Antibodies to quetiapine haptens and use thereof

<u>Field of the Invention</u>

0001The present invention relates to the field of immunoassays, and in particular to antibodies that bind to quetiapine which can be used in immunoassays for detection of quetiapine.

<u>Background</u>

0002Schizophrenia is a chronic and debilitating psychiatric disorder affecting approximately 0.45-1 % of the world's population (<nplcit id="ncit0001" npl-type="s"><text>van Os, J.; Kapur, S. "Schizophrenia" Lancet 2009, 374, 635-645</text></nplcit>). The principal goals of treatment are to achieve sustained remission from psychotic symptoms, reduce the risk and consequences of relapse, and improve patient functioning and overall quality of life. While many patients with schizophrenia are able to achieve symptom stability with the available antipsychotic medications, poor adherence to medication is a common reason for relapse with daily administered oral medications. Several studies (<nplcit id="ncit0002" npl-type="s"><text>Abdel-Baki, A.; Ouellet-Plamondon, C.; Malla, A. "Pharmacotherapy Challenges in Patients with First-Episode Psychosis" Journal of Affective Disorders 2012, 138, S3-S14</text></nplcit>) investigating the outcomes of non-compliance have shown that patients with schizophrenia who do not take their medication as prescribed have higher rates of relapse, hospital admission and suicide as well as increased mortality. It is estimated that 40 to 75% of patients with schizophrenia have difficulty adhering to a daily oral treatment regimen (<nplcit id="ncit0003" npl-type="s"><text>Lieberman, J. A.; Stroup, T. S.; McEvoy, J. P.; Swartz, M. S.; Rosenheck, R. A.; Perkins, D. O.; Keefe, R. S. E.; Davis, S. M.; Davis, C. E.; Lebowitz, B. D.; Severe, J.; Hsiao, J. K. "Effectiveness of Antipyschotic Drugs in Patients with Chronic Schizophrenia" New England Journal of Medicine 2005, 353(12), 1209-1223</text></nplcit>).

0003Therapeutic drug monitoring (TDM) is the quantification of serum or plasma concentrations of drugs, including anti-psychotic drugs, for treatment monitoring and optimization. Such monitoring permits, for example, the identification of patients that are not adhering to their medication regimen, that are not achieving therapeutic doses, that are non-responsive at therapeutic doses, that have suboptimal tolerability, that have pharmacokinetic drug-drug interactions, or that have abnormal metabolism resulting in inappropriate plasma concentrations. Considerable individual variability exists in the patient's ability to absorb, distribute, metabolize, and excrete anti-psychotic drugs. Such differences can be caused by concurrent disease, age, concomitant medication or genetic peculiarities. Different drug formulations can also influence the metabolism of anti-psychotic drugs. TDM permits dose optimization for individual patients, improving therapeutic and functional outcomes. TDM further permits a prescribing clinician to ensure compliance with prescribed dosages and achievement of effective serum concentrations.

0004To date, methods for determining the levels of serum or plasma concentrations of anti-psychotic drugs involve the use of liquid chromatography (LC) with UV or mass spectrometry detection, and radioimmunoassays (see, for example, <nplcit id="ncit0004" npl-type="s"><text>Woestenborghs et al., 1990 "On the selectivity of some recently developed RIA's" in Methodological Surveys in Biochemistry and Analysis 20:241-246</text></nplcit>. Analysis of Drugs and Metabolites, Including Anti-infective Agents; <nplcit id="ncit0005" npl-type="s"><text>Heykants et al., 1994 "The Pharmacokinetics of Risperidone in Humans: A Summary", J Clin Psychiatry 55/5, suppl:13-17</text></nplcit>; <nplcit id="ncit0006" npl-type="s"><text>Huang et al., 1993 "Pharmacokinetics of the novel anti-psychotic agent risperidone and the prolactin response in healthy subjects", Clin Pharmacol Ther 54:257-268</text></nplcit>). Radioimmunoassays detect one or both of risperidone and paliperidone. Salamone et al. in <patcit id="pcit0001" dnum="US8088594B"><text>US Patent No. 8,088,594</text></patcit> disclose a competitive immunoassay for risperidone using antibodies that detect both risperidone and paliperidone but not pharmacologically inactive metabolites. The antibodies used in the competitive immunoassay are developed against a particular immunogen. ID Labs Inc. (London, Ontario, Canada) markets an ELISA for olanzapine, another anti-psychotic drug, which also utilizes a competitive format. The Instructions For Use indicate that the assay is designed for screening purposes and intended for forensic or research use, and is specifically not intended for therapeutic use. The Instructions recommend that all positive samples should be confirmed with gas chromatography/mass spectrometry (GC-MS), and indicate that the antibody used detects olanzapine and clozapine (see ID Labs Inc., "Instructions For Use Data Sheet IDEL-F083", Rev. Date Aug. 8, 2011). Some of these methods, namely HPLC and GC/MS, can be expensive and labor-intensive, and are generally only performed in large or specialty labs having the appropriate equipment.

0005A need exists for other methods for determining the levels of anti-psychotic drugs, particularly methods that can be performed in a prescribing clinician's office (where the treatment for an individual patient can be adjusted accordingly in a much more timely manner) and in other medical settings lacking LC or GC/MS equipment or requiring rapid test results.

0006<patcit id="pcit0002" dnum="WO2011082076A"><text>WO 2011/082076</text></patcit> describes the synthesis and use of conjugates of quetiapine with standard, non-standard or synthetic amino acids. <patcit id="pcit0003" dnum="US2011223207A"><text>US 2011/223207</text></patcit> describes the synthesis of conjugates of quetiapine with fatty acids. <patcit id="pcit0004" dnum="WO2011115733A"><text>WO 2011/115733</text></patcit> describes conjugates and immunogens derived from risperidone or paliperidone, and methods of producing antibodies that selectively bind to paliperidone and risperidone and not to other metabolites.

0007Quetiapine is: <chemistry id="chem0001" num="0001"><img file="EP3663317B1_D0001.tif" /></chemistry>

<u>Summary of the Invention</u>

0008The present invention is directed to an isolated antibody or a binding fragment thereof, which specifically binds to quetiapine, and which is generated in response to a conjugate of a compound of Formula I and an immunogenic carrier, <chemistry id="chem0002" num="0002"><img file="EP3663317B1_D0002.tif" /></chemistry> wherein: R¹ is H, <chemistry id="chem0003" num="0003"><img file="EP3663317B1_D0003.tif" /></chemistry> R² is H, <chemistry id="chem0004" num="0004"><img file="EP3663317B1_D0004.tif" /></chemistry> R³ is H, <ul id="ul0001" list-style="none" compact="compact"><li>m is 1, 2, 3, 4, or 5; and</li><li>n is 1, 2, 3, 4, or 5, wherein either R¹ or R² is H, and wherein the immunogenic carrier is conjugated to the compound of Formula I at R¹ when R¹ is not H, or at R² when R² is not H.</li></ul>

0009The antibodies designated 11, 89-3, 89-5, and 89-13 were generated against the compound having Formula II. Another suitable immunogen is the compound having Formula III. <chemistry id="chem0005" num="0005"><img file="EP3663317B1_D0005.tif" /></chemistry><chemistry id="chem0006" num="0006"><img file="EP3663317B1_D0006.tif" /></chemistry>

0010The antibodies of the subject invention can be provided in assay kits and assay devices, with a presently preferred device being a lateral flow assay device which provides for point-of-care analysis.

0011The antibodies of the invention can be used in a method of producing an antibody which binds to quetiapine, the method comprising: (i) selecting a host cell for antibody production; and (ii) inoculating the host with a conjugate of a compound of Formula I and an immunogenic carrier, wherein the host produces an antibody which binds to quetiapine. Further provided is a method of producing a hybridoma cell line capable of producing a monoclonal antibody which binds to quetiapine. The method comprises: (i) selecting a host for antibody production; (ii) inoculating the host with a conjugate of a compound of Formula I and an immunogenic carrier; (iii) fusing a cell line from the inoculated host with a continuously dividing cell to create a fused cell capable of producing a monoclonal antibody which binds to quetiapine; and (iv) cloning the fused cell so as to obtain a hybridoma cell line.

0012The antibodies of the invention can be used in a method of detecting quetiapine in a sample. The method comprises: (i) contacting a sample with an antibody according to the subject invention which is labeled with a detectable marker, wherein the labeled antibody and quetiapine present in the sample form a labeled complex; and (ii) detecting the labeled complex so as to detect quetiapine in the sample.

0013The antibodies of the invention can be used in a competitive immunoassay method for detecting quetiapine in a sample. The method comprises: (i) contacting a sample with an antibody according to the subject invention, and with quetiapine or a competitive binding partner of quetiapine, wherein one of the antibody and the quetiapine or competitive binding partner thereof is labeled with a detectable marker, and wherein sample quetiapine competes with the quetiapine or competitive binding partner thereof for binding to the antibody; and (ii) detecting the label so as to detect sample quetiapine.

0014Further objects, features and advantages of the present invention will be apparent to those skilled in the art from detailed consideration of the preferred embodiments that follow.

<u>Brief Description of the Drawings</u>

0015<ul id="ul0002" list-style="none" compact="compact"><li><figref idref="f0001">Figs. 1 and 2</figref> show Competitive ELISA results generated with various hybridomas;</li><li><figref idref="f0002">Fig. 3</figref> shows the competitive immunoassay format used on a lateral flow assay device;</li><li><figref idref="f0002">Fig. 4</figref> shows a typical dose response curve generated with quetiapine subclones 89-3, 89-13, and 89-5;</li><li><figref idref="f0003">Fig. 5</figref> shows the chip design of a lateral flow assay device according to the subject invention;</li><li><figref idref="f0003">Fig. 6</figref> shows a typical dose response curve for an aripiprazole positive control generated with antibody 5C7 and a labeled aripiprazole competitive binding partner;</li><li><figref idref="f0004">Fig. 7</figref> shows a typical dose response curve for an olanzapine positive control generated with antibody 4G9-1 and a labeled olanzapine competitive binding partner;</li><li><figref idref="f0004">Fig. 8</figref> shows a typical dose response curve for a quetiapine positive control generated with antibody 11 and a labeled quetiapine competitive binding partner;</li><li><figref idref="f0005">Fig. 9</figref> shows a typical dose response curve for a risperidone positive control generated with antibody 5-9 and a labeled risperidone competitive binding partner;</li><li><figref idref="f0005">Fig. 10</figref> shows a typical dose response curve for a sample containing aripiprazole generated with aripiprazole antibody 5C7 in the presence of labeled aripiprazole competitive binding partner, with no dose response curve for olanzapine, quetiapine, or risperidone in the presence of a labeled competitive binding partner for each;</li><li><figref idref="f0006">Fig. 11</figref> shows a typical dose response curve for a sample containing olanzapine generated with olanzapine antibody 4G9-1 in the presence of a labeled olanzapine competitive binding partner, with no dose response curve for aripiprazole, quetiapine, or risperidone in the presence of a labeled competitive binding partner for each;</li><li><figref idref="f0006">Fig. 12</figref> shows a typical dose response curve for a sample containing quetiapine generated with quetiapine antibody 11 in the presence of a labeled quetiapine competitive binding partner, with no dose response curve for aripiprazole, olanzapine, or risperidone in the presence of a labeled competitive binding partner for each;</li><li><figref idref="f0007">Fig. 13</figref> shows a typical dose response curve for a sample containing risperidone generated with risperidone antibody 5-9 in the presence of a labeled risperidone competitive binding partner, with no dose response curve for aripiprazole, olanzapine, or quetiapine in the presence of a labeled competitive binding partner for each;</li><li><figref idref="f0007">Fig. 14</figref> shows a typical dose response curve for a sample containing aripiprazole generated with aripiprazole antibody 5C7 in the presence of a labeled aripiprazole competitive binding partner, with no dose response curve for olanzapine, quetiapine, or risperidone in the presence of antibody and labeled competitive binding partner for each;</li><li><figref idref="f0008">Fig. 15</figref> shows a typical dose response curve for a sample containing olanzapine generated with olanzapine antibody 4G9-1 in the presence of a labeled olanzapine competitive binding partner, with no dose response curve for aripiprazole, quetiapine, or risperidone in the presence of antibody and labeled competitive binding partner for each;</li><li><figref idref="f0008">Fig. 16</figref> shows a typical dose response curve for a sample containing quetiapine generated with quetiapine antibody 11 in the presence of labeled quetiapine competitive binding partner, with no dose response curve for aripiprazole, olanzapine, or risperidone in the presence of antibody and labeled competitive binding partner for each;</li><li><figref idref="f0009">Fig. 17</figref> shows a typical dose response curve for a sample containing risperidone generated with risperidone antibody 5-9 in the presence of a labeled risperidone competitive binding partner, with no dose response curve for aripiprazole, olanzapine, or quetiapine in the presence of antibody and labeled competitive binding partner for each;</li><li><figref idref="f0009">Fig. 18</figref> shows a comparison of the aripiprazole dose response curve generated as a positive control to the aripiprazole dose response curve generated in the multiplex format;</li><li><figref idref="f0010">Fig. 19</figref> shows a comparison of the olanzapine dose response curve generated as a positive control to the olanzapine dose response curve generated in the multiplex format;</li><li><figref idref="f0010">Fig. 20</figref> shows a comparison of the quetiapine dose response curve generated as a positive control to the quetiapine dose response curve generated in the multiplex format; and</li><li><figref idref="f0011">Fig. 21</figref> shows a comparison of the risperidone dose response curve generated as a positive control to the risperidone dose response curve generated in the multiplex format.</li></ul>

<u>Detailed Description of Preferred Embodiments</u>

0016The invention provides an isolated antibody which binds to quetiapine. The invention further provides an assay kit and an assay device comprising the antibody. Also disclosed are methods of producing the antibody and of producing a hybridoma cell line capable of producing the antibody. Also disclosed is a method of detecting quetiapine in a sample, including a competitive immunoassay method.

0017In one instance, the present disclosure is directed to an isolated antibody or a binding fragment thereof, which binds to quetiapine and which: (i) is generated in response to a conjugate of a compound of Formula I and an immunogenic carrier; or (ii) competes for an epitope which is the same as an epitope bound by the antibody of (i). <chemistry id="chem0007" num="0007"><img file="EP3663317B1_D0007.tif" /></chemistry> wherein: R¹ is H, <chemistry id="chem0008" num="0008"><img file="EP3663317B1_D0008.tif" /></chemistry><chemistry id="chem0009" num="0009"><img file="EP3663317B1_D0009.tif" /></chemistry> CH₂NH₂, or CH₂NHC(O)(CH₂)_mCO₂H, or Z-(Y)_p-G; R² is H, <chemistry id="chem0010" num="0010"><img file="EP3663317B1_D0010.tif" /></chemistry><chemistry id="chem0011" num="0011"><img file="EP3663317B1_D0011.tif" /></chemistry> CH₂NH₂, or CH₂NHC(O)(CH₂)_mCO₂H, <ul id="ul0003" list-style="none" compact="compact"><li>or, Z-(Y)_p-G;</li><li>R³ is H, or W-(Y)_p-G; provided that two of R¹, R², R³ must be H, and further provided that R¹, R² and R³ may not all be H simultaneously;</li><li>wherein: Z is selected from the group consisting of: <ul id="ul0004" list-style="none" compact="compact"><li>-N(R⁴)-, -O-, -S-, -alkyl-, -aminoalkyl-, -thioalkyl-, -heteroalkyl-, -alkylcarbonyl-, <chemistry id="chem0012" num="0012"><img file="EP3663317B1_D0012.tif" /></chemistry></li><li>R⁴ is H, an alkyl group, cycloalkyl group, aralkyl group or substituted or unsubstituted aryl group;</li><li>wherein: W is selected from the group consisting of: <ul id="ul0005" list-style="none" compact="compact"><li>-C(O)-, alkyl-, -aminoalkyl-, -thioalkyl-, -heteroalkyl-, -alkylcarbonyl-;</li><li>Y is an organic spacer group;</li><li>G is a functional linking group capable of binding to a carrier;</li><li>p is 0, or 1;</li><li>m is 1, 2, 3, 4, or 5;</li><li>n is 1, 2, 3, 4, or 5.</li></ul></li></ul></li></ul>

0018In a further instance, the present disclosure is directed to an isolated antibody or a binding fragment thereof, which binds to quetiapine and which: (i) is generated in response to a conjugate of a compound of Formula I and an immunogenic carrier; or (ii) competes for an epitope which is the same as an epitope bound by the antibody of (i); wherein: R¹ is H, <chemistry id="chem0013" num="0013"><img file="EP3663317B1_D0013.tif" /></chemistry><chemistry id="chem0014" num="0014"><img file="EP3663317B1_D0014.tif" /></chemistry> CH₂NH₂, or CH₂NHC(O)(CH₂)_mCO₂H, or Z(Y)_pG; R² is H, <chemistry id="chem0015" num="0015"><img file="EP3663317B1_D0015.tif" /></chemistry><chemistry id="chem0016" num="0016"><img file="EP3663317B1_D0016.tif" /></chemistry> CH₂NH₂, or CH₂NHC(O)(CH₂)_mCO₂H, <ul id="ul0006" list-style="none" compact="compact"><li>or, Z-(Y)_p-G;</li><li>R³ is H, provided that either R¹ or R² must be H, and further provided that both R¹ and R² may not be H simultaneously;</li><li>wherein: Z is selected from the group consisting of: -N(R⁴)-, -O-, -S-, -alkyl-, -aminoalkyl-, -thioalkyl-, -heteroalkyl-, -alkylcarbonyl-, <chemistry id="chem0017" num="0017"><img file="EP3663317B1_D0017.tif" /></chemistry> R⁴ is H, an alkyl group, cycloalkyl group, aralkyl group or substituted or unsubstituted aryl group; <ul id="ul0007" list-style="none" compact="compact"><li>Y is an organic spacer group;</li><li>G is a functional linking group capable of binding to a carrier;</li><li>p is 0, or 1;</li><li>m is 1, 2, 3, 4, or 5;</li><li>n is 1, 2, 3, 4, or 5.</li></ul></li></ul>

0019In a further instance, the present disclosure is directed to an isolated antibody or a binding fragment thereof, which binds to quetiapine and which: (i) is generated in response to a conjugate of a compound of Formula I and an immunogenic carrier; or (ii) competes for an epitope which is the same as an epitope bound by the antibody of (i); wherein: <ul id="ul0008" list-style="none" compact="compact"><li>R¹ is H, or CH₂NH-(Y)_p-G;</li><li>R² is H, or CH₂NH-(Y)_p-G; provided that either R¹ or R² must be H, and further provided that both R¹ and R² may not be H simultaneously;</li><li>R³ is H;</li><li>wherein: <ul id="ul0009" list-style="none" compact="compact"><li>Y is an organic spacer group;</li><li>G is a functional linking group capable of binding to a carrier;</li><li>p is 1.</li></ul></li></ul>

0020In a further instance, the present disclosure is directed to an isolated antibody or a binding fragment thereof, which binds to quetiapine and which: (i) is generated in response to a conjugate of a compound of Formula I and an immunogenic carrier; or (ii) competes for an epitope which is the same as an epitope bound by the antibody of (i); wherein: R¹ is H, <chemistry id="chem0018" num="0018"><img file="EP3663317B1_D0018.tif" /></chemistry><chemistry id="chem0019" num="0019"><img file="EP3663317B1_D0019.tif" /></chemistry> CH₂NH₂, or CH₂NHC(O)(CH₂)_mCO₂H; R² is H, <chemistry id="chem0020" num="0020"><img file="EP3663317B1_D0020.tif" /></chemistry><chemistry id="chem0021" num="0021"><img file="EP3663317B1_D0021.tif" /></chemistry> CH₂NH₂, or CH₂NHC(O)(CH₂)_mCO₂H; provided that either R¹ or R² must be H, and further provided that both R¹ and R² may not be H simultaneously; <ul id="ul0010" list-style="none" compact="compact"><li>R³ is H;</li><li>m is 1, 2, 3, 4, or 5;</li><li>n is 1, 2, 3, 4, or 5.</li></ul>

0021In a further instance, the present disclosure is directed to an isolated antibody or a binding fragment thereof, which binds to quetiapine and which: (i) is generated in response to a conjugate of a compound of Formula I and an immunogenic carrier; or (ii) competes for an epitope which is the same as an epitope bound by the antibody of (i); wherein: R¹ is H, <chemistry id="chem0022" num="0022"><img file="EP3663317B1_D0022.tif" /></chemistry> or CH₂NH₂; R² is H, <chemistry id="chem0023" num="0023"><img file="EP3663317B1_D0023.tif" /></chemistry> , or CH₂NH₂; provided that either R¹ or R² must be H, and further provided that both R¹ and R² may not be H simultaneously; <ul id="ul0011" list-style="none" compact="compact"><li>R³ is H;</li><li>m is 1, 2, 3, 4, or 5;</li><li>n is 1, 2, 3, 4, or 5.</li></ul>

0022In a preferred instance, the present disclosure is directed to an isolated antibody or a binding fragment thereof, which binds to quetiapine and which: (i) is generated in response to a conjugate of a compound of Formula IV and an immunogenic carrier; or (ii) competes for an epitope which is the same as an epitope bound by the antibody of (i). <chemistry id="chem0024" num="0024"><img file="EP3663317B1_D0024.tif" /></chemistry>

0023In a preferred instance, the present disclosure is directed to an isolated antibody or a binding fragment thereof, which binds to quetiapine and which: (i) is generated in response to a conjugate of a compound of Formula V and an immunogenic carrier; or (ii) competes for an epitope which is the same as an epitope bound by the antibody of (i). <chemistry id="chem0025" num="0025"><img file="EP3663317B1_D0025.tif" /></chemistry>

0024In a preferred instance, the present disclosure is directed to an isolated antibody or a binding fragment thereof, which binds to quetiapine and which: (i) is generated in response to a conjugate of a compound of Formula VI and an immunogenic carrier; or (ii) competes for an epitope which is the same as an epitope bound by the antibody of (i). <chemistry id="chem0026" num="0026"><img file="EP3663317B1_D0026.tif" /></chemistry>

0025In a preferred instance, the present disclosure is directed to an isolated antibody or a binding fragment thereof, which binds to quetiapine and which: (i) is generated in response to a conjugate of a compound of Formula VII and an immunogenic carrier; or (ii) competes for an epitope which is the same as an epitope bound by the antibody of (i). <chemistry id="chem0027" num="0027"><img file="EP3663317B1_D0027.tif" /></chemistry>

0026Preferably, the antibody of the present disclosure is generated in response to a conjugate of a compound selected from the compounds of: Formula I, Formula IV, Formula V, Formula VI, and Formula VII; and an immunogenic carrier.

0027Further details of the compounds described by the formulas above and the conjugates formed by the compounds and an immunogenic carrier are provided in the section below entitled "Compounds, Conjugates and Immunogens".

0028Further details of the antibodies of the subject invention are provided in the section below entitled "Antibodies".

0029The subject invention further provides an assay kit comprising the antibody, as well as an assay device comprising the antibody. Preferably, the assay device is a lateral flow assay device. Further details of the assay kits and assay devices are provided below in the section entitled "Assay Kits and Devices".

0030The antibodies of the invention can be used in a method of producing an antibody which binds to quetiapine, the method comprising: (i) selecting a host cell for antibody production; and (ii) inoculating the host with a conjugate of a compound of Formula I and an immunogenic carrier, wherein the host produces an antibody which binds to quetiapine. In additional embodiments, the conjugate used in the method can be a conjugate of a compound selected from the compounds of: Formula IV, Formula V, Formula VI, and Formula VII; and an immunogenic carrier. Further details on the production of the antibodies of the subject invention are provided in the section below entitled "Antibodies".

0031Further provided is a method of producing a hybridoma cell line capable of producing a monoclonal antibody which binds to quetiapine. The method comprises: (i) selecting a host for antibody production; (ii) inoculating the host with a conjugate of a compound of Formula I and an immunogenic carrier; (iii) fusing a cell line from the inoculated host with a continuously dividing cell to create a fused cell capable of producing a monoclonal antibody which binds to quetiapine; and (iv) cloning the fused cell so as to obtain a hybridoma cell line. In additional embodiments, the conjugate used in the method can be a conjugate of a compound selected from the compounds of: Formula IV, Formula V, Formula VI, and Formula VII; and an immunogenic carrier. Further details of the production of hybridomas capable of producing an antibody of the invention are provided in the section below entitled "Antibodies".

0032The antibodies of the invention can be used in a method of detecting quetiapine in a sample. The method comprises: (i) contacting a sample with an antibody according to the subject invention which is labeled with a detectable marker, wherein the labeled antibody and quetiapine present in the sample form a labeled complex; and (ii) detecting the labeled complex so as to detect quetiapine in the sample. Further details of the method of detecting quetiapine using an antibody of the invention are provided in the section below entitled "Immunoassays".

0033The antibodies of the invention can be used in a competitive immunoassay method for detecting quetiapine in a sample. The method comprises: (i) contacting a sample with an antibody according to the subject invention, and with quetiapine or a competitive binding partner of quetiapine, wherein one of the antibody and the quetiapine or competitive binding partner thereof is labeled with a detectable marker, and wherein sample quetiapine competes with the quetiapine or competitive binding partner thereof for binding to the antibody; and (ii) detecting the label so as to detect sample quetiapine. Further details of the competitive immunoassay method of detecting quetiapine using an antibody of the invention are provided in the section below entitled "Immunoassays".

0034In a preferred embodiment using antibodies of the invention, the detection of quetiapine is accompanied by the detection of one or more analytes in addition to quetiapine. Preferably the one or more additional analytes are anti-psychotic drugs other than quetiapine, and more preferably the anti-psychotic drugs other than quetiapine are selected from the group consisting of: aripiprazole, risperidone, paliperidone, olanzapine, and metabolites thereof.

0035As discussed above, the antibodies of the subject invention can be used in assays to detect the presence and/or amount of the anti-psychotic drug in patient samples. Such detection permits therapeutic drug monitoring enabling all of the benefits thereof. Detection of levels of anti-psychotic drugs may be useful for many purposes including: determination of patient adherence or compliance with prescribed therapy; use as a decision tool to determine whether a patient should be converted from an oral anti-psychotic regimen to a long-acting injectable anti-psychotic regimen; use as a decision tool to determine if the dose level or dosing interval of oral or injectable anti-psychotics should be increased or decreased to ensure attainment or maintenance of efficacious or safe drug levels; use as an aid in the initiation of anti-psychotic drug therapy by providing evidence of the attainment of minimum pK levels; use to determine bioequivalence of anti-psychotic drug in multiple formulations or from multiple sources; use to assess the impact of polypharmacy and potential drug-drug interactions; and use as an indication that a patient should be excluded from or included in a clinical trial and as an aid in the subsequent monitoring of adherence to clinical trial medication requirements.

COMPOUNDS, CONJUGATES AND IMMUNOGENS

0036In relation to the compounds and conjugates and immunogens, the following abbreviations are used: AMAS is N-(α-maleimidoacetoxy) succinimide ester; BINAP is 2,2'-bis(diphenylphosphino)-1,1'-binapthyl; Boc or BOC is <i>tert-</i>butoxycarbonyl; BTG is bovine thyroglobulin; Bu₃N is tributylamine; DCC is dicyclohexylcarbodiimide; DCM is dichloromethane; DIEA is diisopropylethylamine; DMF is N,N-dimethylformamide; EDCI or EDC is 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride; EDTA is ethylenediaminetetraaceticacid; HOBT or HOBt is 1-hydroxybenzotriazole hydrate; KLH is keyhole limpet hemocyanin; Pd₂(dba)₃ is tris(dibenzylideneacetone) dipalladium(0); SATA is N-succinimidyl S-acetylthioacetate; TEA or Et3N is triethylamine; THF is tetrahydrofuran; TFA is trifluoroacetic acid; r.t. is room temperature; DEAD is diethylazodicarboxylate; DIC is diisopropylcarbodiimide; NHS is N-hydroxysuccinimide; TFP is Tetrafluorophenyl; PNP is p-nitrophenyl; TBTU is O-(Benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate; DEPBT is 3-(diethoxyphosphoryloxy)-1,2,3-benzotrazin-4(3H)-one; BOP-CI is Bis(2-oxo-3-oxazolidinyl)phosphonic chloride; DTT is dithioerythritol.

0037The term "conjugate" refers to any substance formed from the joining together of separate parts. Representative conjugates include those formed by the joining together of a small molecule, such as the compounds of Formula I, and a large molecule, such as a carrier or a polyamine polymer, particularly a protein. In the conjugate the small molecule may be joined at one or more active sites on the large molecule.

0038The term "hapten" refers to a partial or incomplete antigen. A hapten is a protein-free substance, which is not capable of stimulating antibody formation, but which does react with antibodies. The antibodies are formed by coupling a hapten to a high molecular weight immunogenic carrier, and then injecting this coupled product, i.e., an immunogen, into an human or animal subject.

0039The term "immunogen" refers to a substance capable of eliciting, producing, or generating an immune response in an organism.

0040An "immunogenic carrier," as used herein, is an immunogenic substance, commonly a protein, that can join at one or more positions with haptens, thereby enabling the production of antibodies that can bind with these haptens. Examples of immunogenic carrier substances include, but are not limited to, proteins, glycoproteins, complex polyamino-polysaccharides, particles, and nucleic acids that are recognized as foreign and thereby elicit an immunologic response from the host. The polyamino-polysaccharides may be prepared from polysaccharides using any of the conventional means known for this preparation.

0041Various protein types may be employed as immunogenic carriers, including without limitation, albumins, serum proteins, lipoproteins, etc. Illustrative proteins include bovine serum albumin, keyhole limpet hemocyanin, egg ovalbumin, bovine thyroglobulin, fraction V human serum albumin, rabbit albumin, pumpkin seed globulin, diphtheria toxoid, tetanus toxoid, botilinus toxin, succinylated proteins, and synthetic poly(aminoacids) such as polylysine.

0042Immunogenic carriers can also include poly amino-polysaccharides, which are a high molecular weight polymers built up by repeated condensations of monosaccharides. Examples of polysaccharides are starches, glycogen, cellulose, carbohydrate gums such as gum arabic, agar, and so forth. The polysaccharide also contains poly(amino acid) residues and/or lipid residues.

0043The immunogenic carrier can also be a poly(nucleic acid) either alone or conjugated to one of the above mentioned poly(amino acids) or polysaccharides.

0044The immunogenic carrier can also include solid particles. The particles are generally at least about 0.02 microns (µm) and not more than about 100 µm, and usually about 0.05 µm to 10 µm in diameter. The particle can be organic or inorganic, swellable or non-swellable, porous or non-porous, optimally of a density approximating water, generally from about 0.7 to 1.5 g/mL, and composed of material that can be transparent, partially transparent, or opaque. The particles can be biological materials such as cells and microorganisms, including non-limiting examples such as erythrocytes, leukocytes, lymphocytes, hybridomas, Streptococcus, Staphylococcus aureus, E. coli, and viruses. The particles can also be comprised of organic and inorganic polymers, liposomes, latex, phospholipid vesicles, or lipoproteins.

0045The term "derivative" refers to a chemical compound or molecule made from a parent compound by one or more chemical reactions.

0046The term "analogue" of a chemical compound refers to a chemical compound that contains a chain of carbon atoms and the same particular functional groups as a reference compound, but the carbon chain of the analogue is longer or shorter than that of the reference compound.

0047A "label," "detector molecule," "reporter" or "detectable marker" is any molecule which produces, or can be induced to produce, a detectable signal. The label can be conjugated to an analyte, immunogen, antibody, or to another molecule such as a receptor or a molecule that can bind to a receptor such as a ligand, particularly a hapten or antibody. A label can be attached directly or indirectly by means of a linking or bridging moiety. Non-limiting examples of labels include radioactive isotopes (e.g., ¹²⁵I), enzymes (e.g. β-galactosidase, peroxidase), enzyme fragments, enzyme substrates, enzyme inhibitors, coenzymes, catalysts, fluorophores (e.g., rhodamine, fluorescein isothiocyanate or FITC, or Dylight 649), dyes, chemiluminescers and luminescers (e.g., dioxetanes, luciferin), or sensitizers.

0048As used herein, a "spacer" refers to a portion of a chemical structure which connects two or more substructures such as haptens, carriers, immunogens, labels or binding partners through a functional linking group. These spacer groups are composed of the atoms typically present and assembled in ways typically found in organic compounds and so may be referred to as "organic spacing groups". The chemical building blocks used to assemble the spacers will be described hereinafter in this application. Among the preferred spacers are straight or branched, saturated or unsaturated carbon chains. These carbon chains may also include one or more heteroatoms within the chain, one or more heteroatoms replacing one or more hydrogens of any carbon atom in the chain, or at the termini of the chains. By "heteroatoms" is meant atoms other than carbon which are chosen from the group consisting of oxygen, nitrogen, phosphorous and sulfur, wherein the nitrogen, phosphorous and sulfur atoms may exist in any oxidation state and may have carbon or other heteroatoms bonded to them. The spacer may also include cyclic or aromatic groups as part of the chain or as a substitution on one of the atoms in the chain.

0049The number of atoms in the spacing group is determined by counting the atoms other than hydrogen. The number of atoms in a chain within a spacing group is determined by counting the number of atoms other than hydrogen along the shortest route between the substructures being connected. Preferred chain lengths are between 1 to 20 atoms.

0050A "functional linking group" refers to a reactive group that is present on a hapten and may be used to provide an available reactive site through which the hapten portion may be coupled to another moiety through formation of a covalent chemical bond to produce a conjugate of a hapten with another moiety (such as a label or carrier). The hapten may be linked in this way to a moiety such as biotin to form a competitive binding partner.

0051Spacer groups may be used to link the hapten to the carrier. Spacers of different lengths allow one to attach the hapten with differing distances from the carrier for presentation to the immune system of the animal or human being immunized for optimization of the antibody formation process. Attachment to different positions in the hapten molecule allows the opportunity to present specific sites on the hapten to the immune system to influence antibody recognition. The spacer may contain hydrophilic solubilizing groups to make the hapten derivative more soluble in aqueous media. Examples of hydrophilic solubilizing groups include but are not limited to polyoxyalkyloxy groups, for example, polyethylene glycol chains; hydroxyl, carboxylate and sulfonate groups.

0052The term "nucleophilic group" or "nucleophile" refers to a species that donates an electron-pair to form a chemical bond in a reaction. The term "electrophilic group" or "electrophile" refers to a species that accepts an electron-pair from a nucleophile to form a chemical bond in a reaction.

0053The term "substituted" refers to substitution of an atom or group of atoms in place of a hydrogen atom on a carbon atom in any position on the parent molecule. Non limiting examples of substituents include halogen atoms, amino, hydroxy, carboxy, alkyl, aryl, heteroalkyl, heteroaryl, cyano, alkoxy, nitro, aldehyde and ketone groups.

0054The term "alkyl" refers to saturated or unsaturated linear and branched chain radicals of up to 12 carbon atoms, unless otherwise indicated, and is specifically intended to include radicals having any degree or level of saturation. Alkyl includes, but is not limited to, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, <i>tert</i>-butyl, pentyl, isopentyl, hexyl, isohexyl, heptyl, octyl, 2,2,4-trimethylpentyl, nonyl, decyl, undecyl and dodecyl.

0055The term "cycloalkyl" refers to a saturated or partially unsaturated monocyclic or bicyclic hydrocarbon ring radical composed of from 3 to 10 carbon atoms. Alkyl substituents may optionally be present on the ring. Examples include cyclopropyl, 1,1-dimethyl cyclobutyl, 1,2,3-trimethylcyclopentyl, cyclohexyl and cyclohexenyl.

0056The term "heteroalkyl" refers to an alkyl group that includes one or more heteroatoms within the chain, one or more heteroatoms replacing one or more hydrogens of any carbon atom in the chain, or at termini of the chains.

0057The term "aminoalkyl" refers to at least one primary or secondary amino group bonded to any carbon atom along an alkyl chain.

0058The term "alkoxy" refers to straight or branched chain radicals of up to 12 carbon atoms, unless otherwise indicated, bonded to an oxygen atom. Examples include but are not limited to methoxy, ethoxy, propoxy, isopropoxy and butoxy.

0059The term "alkoxyalkyl" refers to at least one alkoxy group bonded to any carbon atom along an alkyl chain.

0060The term "thioalkyl" refers to at least one sulfur group bonded to any carbon atom along an alkyl chain. The sulfur group may be at any oxidation state and includes sulfoxides, sulfones and sulfates.

0061The term "carboxylate group" includes carboxylic acids and alkyl, cycloalkyl, aryl or aralkyl carboxylate esters.

0062The term "alkylcarbonyl" refers to a group that has a carbonyl group bonded to any carbon atom along an alkyl chain.

0063The term "heteroaryl" refers to 5- to 7-membered mono- or 8- to 10-membered bicyclic aromatic ring radicals, any ring of which may consist of from one to four heteroatoms selected from N, O or S where the nitrogen and sulfur atoms can exist in any allowed oxidation state. Examples include benzimidazolyl, benzothiazolyl, benzothienyl, benzoxazolyl, furyl, imidazolyl, isothiazolyl, isoxazolyl, oxazolyl, pyrazinyl, pyrazolyl, pyridyl, pyrimidinyl, pyrrolyl, quinolinyl, thiazolyl and thienyl.

0064The term "aryl" refers to monocyclic or bicyclic aromatic ring radicals containing from 6 to 12 carbons in the ring. Alkyl substituents may optionally be present on the ring. Examples include phenyl, biphenyl and napththalene.

0065The term "aralkyl" refers to a C_1-6 alkyl group containing an aryl substituent. Examples include benzyl, phenylethyl or 2-naphthylmethyl.

0066The term "acyl" refers to the group -C(O)R_a, where R_a is hydrogen, alkyl, cycloalkyl, heteroalkyl, aryl, aralkyl and heteroaryl. An "acylating agent" adds the - C(O)R_a group to a molecule.

0067The term "sulfonyl" refers to the group -S(O)₂R_b, where R_b is hydrogen, alkyl, cycloalkyl, heteroalkyl, haloalkyl, aryl, aralkyl and heteroaryl . A "sulfonylating agent" adds the -S(O)₂R_a group to a molecule.

0068Spacers bearing reactive functional linking groups for the attachment of haptens to carrier moieties may be prepared by a wide variety of methods. The spacer may be formed using a molecule that is differentially functionalized or activated with groups at either end to allow selective sequential reaction with the hapten and the carrier, but the same reactive moiety may also be used at both ends. The groups selected for reaction with the hapten and the functional linking group to be bound to the carrier are determined by the type of functionality on the hapten and the carrier that the hapten is to be bonded with. Spacers and methods of attachment to haptens and carriers include but are not limited to those described by <nplcit id="ncit0007" npl-type="s"><text>Brinkley, M., A., Bioconjugate Chem. 1992, 3:2-13</text></nplcit>, <nplcit id="ncit0008" npl-type="b"><text>Hermanson, Greg T., Bioconjugate Techniques,.Academic Press, London, Amsterdam, Burlington, MA, USA, 2008 </text></nplcit>and <nplcit id="ncit0009" npl-type="b"><text>Thermo Scientific Pierce Crosslinking Technical Handbook</text></nplcit><i>;</i> available for download or hard copy request from <b>Thermo Scientific</b> 3747 N Meridian Rd, Rockford, IL USA 61101, ph 800-874-3723 or at: http://www.piercenet.com/ and references within. Many differentially activated molecules for formation of spacer groups are commercially available from vendors, for example <b>Thermo Scientific.</b>

0069For haptens bearing an amino group, modes of attachment of the spacer to the hapten include reaction of the amine on the hapten with a spacer building block bearing an acyl halide or active ester. "Active esters" are defined as esters that undergo reaction with a nucleophilic group, for example an amino group, under mild conditions to form a stable linkage. A stable linkage is defined as one that remains intact under conditions of further use, for example subsequent synthetic steps, use as an immunogen, or in a biochemical assay. A preferred example of a stable linkage is an amide bond. Active esters and methods of formation are described by Benoiton, N.L., in Houben-Weyl, <i>Methods of Organic Chemistry,</i> Thieme Stuttgart, New York, vol E22 section 3.2:443 and Benoiton, N.L., <i>Chemistry of Peptide Synthesis,</i> Taylor and Francis, NY, <b>2006.</b> Preferred active esters include p-nitrophenyl ester (PNP), N-hydroxysuccinimide ester (NHS) and tetrafluorophenyl ester (TFP). Acyl halides may be prepared by many methods known to one skilled in the art for example, reaction of the carboxylic acid with thionyl chloride or oxalyl chloride, see: Fieser, L.F. and Fieser, M. <i>Reagents for Organic Synthesis,</i> John Wiley and Sons, NY, <b>1967</b> and references within. These may be converted to other active esters such as p-nitrophenyl esters (PNP) which may also be used in active bi-functional spacers as described by <nplcit id="ncit0010" npl-type="s"><text>Wu et.al, Organic Letters, 2004 ,6 (24):4407</text></nplcit>. N-hydroxysuccinimide (NHS) esters may be prepared by reaction of N,N-disuccinimidyl carbonate (<nplcit id="ncit0011" npl-type="c"><text>CAS 74124-79-1</text></nplcit>) with the carboxylic acid of a compound in the presence of an organic base such as triethylamine or diisopropylethylamine in an aprotic solvent under anhydrous conditions as described in Example 35 of <patcit id="pcit0005" dnum="WO2012012595A"><text>WO2012012595</text></patcit> or by using N-hydroxysuccinimide and dicyclohexylcarbodiimide (DCC) or other dehydrating agent, under anhydrous conditions. Tetrafluorophenyl esters (TFP) may be prepared by reaction of carboxylic acids with 2,3,5,6-tetrafluorophenyltrifluoroacetate in the presence of an organic base such as triethylamine or diisopropylethylamine in an aprotic solvent under anhydrous conditions as reported by<nplcit id="ncit0012" npl-type="s"><text> Wilbur, et.al, Bioconjugate Chem., 2004,15(1):203</text></nplcit>. One skilled in the art will recognize that spacers shown in Table 1, among others, can be obtained using known methods and attached to amino-bearing haptens utilizing routine optimization of reaction conditions. These spacers allow attachment of the hapten to a thiol group on a carrier. <tables id="tabl0001" num="0001"><table frame="all"><title>Table 1</title><tgroup cols="2"><colspec colnum="1" colname="col1" colwidth="80mm" /><colspec colnum="2" colname="col2" colwidth="79mm" /><tbody><row><entry><chemistry id="chem0028" num="0028"><img file="EP3663317B1_D0028.tif" /></chemistry></entry><entry><chemistry id="chem0029" num="0029"><img file="EP3663317B1_D0029.tif" /></chemistry></entry></row><row><entry><chemistry id="chem0030" num="0030"><img file="EP3663317B1_D0030.tif" /></chemistry></entry><entry><chemistry id="chem0031" num="0031"><img file="EP3663317B1_D0031.tif" /></chemistry></entry></row><row><entry><chemistry id="chem0032" num="0032"><img file="EP3663317B1_D0032.tif" /></chemistry></entry><entry><chemistry id="chem0033" num="0033"><img file="EP3663317B1_D0033.tif" /></chemistry></entry></row><row><entry><chemistry id="chem0034" num="0034"><img file="EP3663317B1_D0034.tif" /></chemistry></entry><entry><chemistry id="chem0035" num="0035"><img file="EP3663317B1_D0035.tif" /></chemistry></entry></row><row><entry><chemistry id="chem0036" num="0036"><img file="EP3663317B1_D0036.tif" /></chemistry></entry><entry><chemistry id="chem0037" num="0037"><img file="EP3663317B1_D0037.tif" /></chemistry></entry></row><row><entry><chemistry id="chem0038" num="0038"><img file="EP3663317B1_D0038.tif" /></chemistry></entry><entry>Reasonable values for m and n are between 1 and 10</entry></row></tbody></tgroup></table></tables>

0070Direct coupling of the amine on the hapten and a carboxylic acid functionality on the spacer building block in the presence of a coupling agent may also be used as a mode of attachment. Preferred reagents are those typically used in peptide synthesis. Peptide coupling reagents include but are not limited to O-(Benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate (TBTU, <nplcit id="ncit0013" npl-type="c"><text>CAS #125700-67-6</text></nplcit>), see: <nplcit id="ncit0014" npl-type="s"><text>Pruhs, S., Org. Process. Res. Dev. 2006, 10:441</text></nplcit>; N-Hydroxybenzotriazole (HOBT, <nplcit id="ncit0015" npl-type="c"><text>CAS #2592-95-2</text></nplcit>) with a carbodiimide dehydrating agent, for example N-N-dicyclohexylcarbodiimide (DCC), diisopropylcarbodiimide (DIC), or 1-ethyl-3(3-dimethylaminopropyl)carbodiimidehydrochloride (EDC), see: <nplcit id="ncit0016" npl-type="s"><text>König W., Geiger, R. Chem. Ber., 1970, 103(3)-788 </text></nplcit>; 3-(diethoxyphosphoryloxy)-1,2,3-benzotrazin-4(3H)-one (DEPBT, <nplcit id="ncit0017" npl-type="c"><text>CAS#165534-43-0</text></nplcit>), see: <nplcit id="ncit0018" npl-type="s"><text>Liu, H. et.al., Chinese Chemical Letters, 2002, 13(7):601</text></nplcit>; Bis(2-oxo-3-oxazolidinyl)phosphonic chloride; (BOP-Cl, <nplcit id="ncit0019" npl-type="c"><text>CAS# 68641-49-6</text></nplcit>), see: <nplcit id="ncit0020" npl-type="s"><text>Diago-Meseguer, J et.al. Synthesis, 1980, 7:547-51 </text></nplcit> and others described in detail by <nplcit id="ncit0021" npl-type="b"><text>Benoiton in Chemistry of Peptide Synthesis, CRC Press, Boca Raton, FL, 2005, Chapter 2</text></nplcit>, and the technical bulletin provided by <b>Advanced Automated Peptide Protein Technologies</b> (aapptec), 6309 Shepardsville Rd., Louisville KY 40228, ph 888 692 9111; www.aapptec.com, and references within. These methods create a stable amide linkage attaching the hapten to the spacer. Examples of spacers that can be obtained using known methods and attached to amino-bearing haptens utilizing routine optimization of reaction conditions employing the methods described and cited above are shown, but not limited to those in Table 2. These spacers allow attachment of the hapten to a thiol group on a carrier. <tables id="tabl0002" num="0002"><table frame="all"><title>Table 2</title><tgroup cols="3" rowsep="0"><colspec colnum="1" colname="col1" colwidth="87mm" /><colspec colnum="2" colname="col2" colwidth="40mm" /><colspec colnum="3" colname="col3" colwidth="40mm" /><tbody><row rowsep="1"><entry><chemistry id="chem0039" num="0039"><img file="EP3663317B1_D0039.tif" /></chemistry> reasonable range for n is between 1-10</entry><entry><chemistry id="chem0040" num="0040"><img file="EP3663317B1_D0040.tif" /></chemistry></entry><entry><chemistry id="chem0041" num="0041"><img file="EP3663317B1_D0041.tif" /></chemistry></entry></row></tbody></tgroup></table></tables>

0071Spacers may also be constructed in a step-wise fashion by sequential attachment of appropriate chemical groups to the hapten including the step of forming the functional linking group that is capable of binding to the carrier. See illustrative examples under General Reaction Schemes.

0072Additionally, when the hapten has a nucleophilic group, for example a thiol group, an amino group or a hydroxyl group which will become the point of attachment of the spacer, the spacer may also be constructed by alkylation of the thiol, amine or hydroxyl group. Any alkyl group that is appropriately substituted with a moiety capable of undergoing a substitution reaction, for example, an alkyl halide, or sulfonic acid ester such as p-Toluenesulfonate, may be used to attach the spacer. Many examples of alkylation reactions are known to one skilled in the art and specific examples may be found in the general chemical literature and optimized through routine experimentation. A discussion of alkylation reactions with many references can be found in <nplcit id="ncit0022" npl-type="b"><text>Chapter 10 of March's Advanced Organic Chemistry, Smith, M.B., and March, J., John Wiley &amp; sons, Inc. NY, 2001</text></nplcit><b>.</b> Other linkages may also be employed such as reaction of the nucleophilic moiety, for example an amine, on the hapten with an isocyanate to form a urea or reaction with an isothiocyanate to form a thiourea linkage, see: <nplcit id="ncit0023" npl-type="s"><text>Li, Z., et.al., Phosphorus, Sulfur and Silicon and the Related Elements, 2003, 178(2):293-297</text></nplcit>. Spacers may be attached to haptens bearing hydroxyl groups via reaction with isocyanate groups to form carbamate or urethane linkages. The spacer may be differentially activated with the isocyanate functional group on one end and a functional linking group capable of reacting with the carrier, see: <nplcit id="ncit0024" npl-type="s"><text>Annunziato, M.E., Patel, U.S., Ranade, M. and Palumbo, P.S., Bioconjugate Chem., 1993, 4:212-218</text></nplcit>.

0073For haptens bearing a carboxylic acid group, modes of attachment of a spacer portion to the hapten include activation of the carboxylic acid group as an acyl halide or active ester, examples of which are shown in Table 3, preparation of which are described previously, followed by reaction with an amino (-NH₂-), hydrazino (-NH-NH₂-), hydrazido (-C(O)-NH-NH₂-) or hydroxyl group (-OH) on the spacer portion to form an amide, hydrazide, diacylhydrazine or ester linkage, or direct coupling of the carboxylic acid group with an amino group on the spacer portion or directly on the carrier with a peptide coupling reagent and/or carbodiimide dehydrating reagent, described previously, examples of which are shown in Tables 4 and 5. Procedures found in references cited previously for formation of activated esters and use of peptide coupling agents may be employed for attachment of carboxylic acid-bearing haptens to spacer building blocks and protein carriers with available amino groups utilizing routine optimization of reaction conditions. <tables id="tabl0003" num="0003"><table frame="all"><title>Table 3</title><tgroup cols="4" rowsep="0"><colspec colnum="1" colname="col1" colwidth="103mm" /><colspec colnum="2" colname="col2" colwidth="34mm" /><colspec colnum="3" colname="col3" colwidth="46mm" /><colspec colnum="4" colname="col4" colwidth="43mm" /><tbody><row rowsep="1"><entry><chemistry id="chem0042" num="0042"><img file="EP3663317B1_D0042.tif" /></chemistry> Sulfo NHS and NHS</entry><entry><chemistry id="chem0043" num="0043"><img file="EP3663317B1_D0043.tif" /></chemistry> TFP</entry><entry>—co₂x X=Cl, Br Acyl chloride</entry><entry><chemistry id="chem0044" num="0044"><img file="EP3663317B1_D0044.tif" /></chemistry></entry></row></tbody></tgroup></table></tables><tables id="tabl0004" num="0004"><table frame="all"><title>Table 4</title><tgroup cols="4" rowsep="0"><colspec colnum="1" colname="col1" colwidth="38mm" /><colspec colnum="2" colname="col2" colwidth="53mm" /><colspec colnum="3" colname="col3" colwidth="49mm" /><colspec colnum="4" colname="col4" colwidth="54mm" /><tbody><row rowsep="1"><entry><chemistry id="chem0045" num="0045"><img file="EP3663317B1_D0045.tif" /></chemistry> HOBT</entry><entry><chemistry id="chem0046" num="0046"><img file="EP3663317B1_D0046.tif" /></chemistry> DEPT</entry><entry><chemistry id="chem0047" num="0047"><img file="EP3663317B1_D0047.tif" /></chemistry> BOP-CI</entry><entry><chemistry id="chem0048" num="0048"><img file="EP3663317B1_D0048.tif" /></chemistry> TBTU</entry></row></tbody></tgroup></table></tables><tables id="tabl0005" num="0005"><table frame="all"><title>Table 5</title><tgroup cols="3" rowsep="0"><colspec colnum="1" colname="col1" colwidth="67mm" /><colspec colnum="2" colname="col2" colwidth="89mm" /><colspec colnum="3" colname="col3" colwidth="86mm" /><tbody><row rowsep="1"><entry><chemistry id="chem0049" num="0049"><img file="EP3663317B1_D0049.tif" /></chemistry> diisopropylcarbodiimide (DIC)</entry><entry><chemistry id="chem0050" num="0050"><img file="EP3663317B1_D0050.tif" /></chemistry> Dicyclohexylcarbodiimide (DCC)</entry><entry><chemistry id="chem0051" num="0051"><img file="EP3663317B1_D0051.tif" /></chemistry> 1-ethyl-3(3-dimethylaminopropyl)carbodiimide.HCl (EDC)</entry></row></tbody></tgroup></table></tables>

0074Other electrophilic groups may be present on the hapten to attach the spacer, for example, a sulfonyl halide <chemistry id="chem0052" num="0052"><img file="EP3663317B1_D0052.tif" /></chemistry> or electrophilic phosphorous group, for example: <chemistry id="chem0053" num="0053"><img file="EP3663317B1_D0053.tif" /></chemistry> See: <nplcit id="ncit0025" npl-type="s"><text>Malachowski, William P., Coward, James K., Journal of Organic Chemistry, 1994, 59(25):7616 </text></nplcit> or: <chemistry id="chem0054" num="0054"><img file="EP3663317B1_D0054.tif" /></chemistry> R_c is alkyl, cycloalkyl, aryl, substituted aryl, aralkyl.

0075See: <nplcit id="ncit0026" npl-type="s"><text>Aliouane, L., et.al, Tetrahedron Letters, 2011, 52(28):8681</text></nplcit>.

0076Haptens that bear aldehyde or ketone groups may be attached to spacers using methods including but not limited to reaction with a hydrazide group H₂N-NH-C(O)- on the spacer to form an acylhydrazone, see: <nplcit id="ncit0027" npl-type="s"><text>Chamow, S.M., Kogan, T.P., Peers, D.H., Hastings, R.C., Byrn, R.A. and Askenaszi, A., J. Biol. Chem., 1992, 267(22): 15916</text></nplcit>. Examples of bifunctional hydrazide spacer groups that allow attachment to a thiol group on the carrier are shown in Table 6. <tables id="tabl0006" num="0006"><img file="EP3663317B1_D0055.tif" /></tables>

0077Haptens may also contain thiol groups which may be reacted with the carrier provided that the carrier has been modified to provide a group that may react with the thiol. Carrier groups may be modified by methods including but not limited to attachment of a group containing a maleimide functional group by reaction of an amino group on the carrier with N-Succinimidyl maleimidoacetate, (AMAS, <nplcit id="ncit0028" npl-type="c"><text>CAS #55750-61-3</text></nplcit>), Succinimidyl iodoacetate (<nplcit id="ncit0029" npl-type="c"><text>CAS# 151199-81-4</text></nplcit>), or any of the bifunctional spacer groups shown in Table 1 to introduce a group which may undergo a reaction resulting in attachment of the hapten to the carrier.

0078The functional linking group capable of forming a bond with the carrier may be any group capable of forming a stable linkage and may be reactive to a number of different groups on the carrier. The functional linking group may preferably react with an amino group, a carboxylic acid group or a thiol group on the carrier, or derivative thereof. Non-limiting examples of the functional linking group are a carboxylic acid group, acyl halide, active ester (as defined previously), isocyanate, isothiocyanate, alkyl halide, amino group, thiol group, maleimide group, acrylate group (H₂C=CH-C(O)-) or vinyl sulfone group H₂C=CH-SO₂-) See: <nplcit id="ncit0030" npl-type="s"><text>Park, J.W., et.al., Bioconjugate Chem., 2012, 23(3): 350</text></nplcit>. The functional linking group may be present as part of a differentially activated spacer building block that may be reacted stepwise with the hapten and the resulting hapten derivative may then be reacted with the carrier. Alternatively, the hapten may be derivatized with a spacer that bears a precursor group that may be transformed into the functional linking group by a subsequent reaction. When the functional linking group on the spacer is an amine or a carboxylic acid group, the coupling reaction with the carboxylic acid group or amine on the carrier may be carried out directly through the use of peptide coupling reagents according to procedures in the references cited above for these reagents.

0079Particular disulfide groups, for example, pyridyldisulfides, may be used as the functional linking group on the spacer which may undergo exchange with a thiol group on the carrier to from a mixed disulfide linkage, see: <nplcit id="ncit0031" npl-type="s"><text>Ghetie, V., et al., Bioconjugate Chem., 1990, 1:24-31</text></nplcit>. These spacers may be attached by reaction of the amine-bearing hapten with an active ester which is attached to a spacer bearing the pyridyldisulfide group, examples of which include but are not limited to those shown in Table 7. <tables id="tabl0007" num="0007"><img file="EP3663317B1_D0056.tif" /></tables>

0080Most often the carrier is a protein and the ε-amino groups of the lysine residues may be used for attachment, either directly by reaction with an amine-reactive functional linking group or after derivitization with a thiol-containing group, including <i>N-</i>Succinimidyl S-Acetylthioacetate, (SATA, <nplcit id="ncit0032" npl-type="c"><text>CAS 76931-93-6</text></nplcit>), or an analogue thereof, followed by cleavage of the actetate group with hydroxylamine to expose the thiol group for reaction with the functional linking group on the hapten. Thiol groups may also be introduced into the carrier by reduction of disulfide bonds within protein carriers with mild reducing reagents including but not limited to 2-mercaptoethylamine, see: <nplcit id="ncit0033" npl-type="s"><text>Bilah, M., et.al., Bioelectrochemistry, 2010, 80(1):49</text></nplcit>, phosphine reagents, see: <nplcit id="ncit0034" npl-type="s"><text>Kirley, T.L., Analytical Biochemistry, 1989, 180(2):231 </text></nplcit>or dithioerythritol (DTT, <nplcit id="ncit0035" npl-type="c"><text>CAS 3483-12-3</text></nplcit>) <nplcit id="ncit0036" npl-type="s"><text>Cleland, W.,Biochemistry, 1964, 3:480-482</text></nplcit>.

GENERAL REACTION SCHEMES

0081Compounds useful for producing antibodies according to the subject invention can be synthesized in accordance with the general synthetic methods described below. Compounds of Formula (I) can be prepared by methods known to those who are skilled in the art. The following reaction schemes are only meant to represent examples of the invention and are in no way meant to be a limit of the invention.

0082Derivatives of quetiapine may be prepared by a number of methods. The primary hydroxyl group in quetiapine, the starting compound (R₁ and R₂ = H) shown in Scheme 1, may be acylated using, for example, succinic anhydride and the method described by <nplcit id="ncit0037" npl-type="s"><text>Fiedler, H., et.al., Langmuir, 1994, 10:3959</text></nplcit>. The resulting acid may be further functionalized as described elsewhere within this disclosure or attached directly to a carrier using any number of aforementioned methods including those shown in the subsequent examples. <chemistry id="chem0055" num="0055"><img file="EP3663317B1_D0057.tif" /></chemistry>

0083The Primary hydroxyl group of quetiapine may also be alkylated to form an ether according to the procedure of <patcit id="pcit0006" dnum="US20100069356A"><text>US20100069356</text></patcit>, as shown in Scheme 2, using an alkyl halide or a sulfonate ester, such as 4-bromomethylpentanoate in the presence of tetrabutylamonium hydrogensulfate and aqueous sodium hydroxide to provide an acid which may be used as described above. <chemistry id="chem0056" num="0056"><img file="EP3663317B1_D0058.tif" /></chemistry><chemistry id="chem0057" num="0057"><img file="EP3663317B1_D0059.tif" /></chemistry>

0084Compounds of Formula I where R² is CH₂NHC(O)(CH₂)_mCO₂H may be made according to Scheme 3. Reaction of 2-(2-(2-(aminomethyl)-4-(dibenzo[b,f][1,4]thiazepin-11-yl)piperazin-1-yl)ethoxy)ethanol, prepared as described in Example 1, proceeds with a cyclic anhydride compound, such as succinic anhydride or glutaric anhydride, in a solvent such as pyridine, at temperatures ranging from room temperature to 60 °C, for about 48 hours. Those skilled in the art will recognize that the same chemistry may be used to create compounds of Formula I where R¹ is CH₂NHC(O)(CH₂)_mCO₂H. <chemistry id="chem0058" num="0058"><img file="EP3663317B1_D0060.tif" /></chemistry>

0085Compounds of Formula I where R² is <chemistry id="chem0059" num="0059"><img file="EP3663317B1_D0061.tif" /></chemistry> may be made according to Scheme 4. Compounds of Formula I, where R² is CH₂NHC(O)(CH₂)_mCO₂H, prepared as described in scheme 1, are treated with <i>N-t-</i>butoxycarbonylpiperazine, diethyl cyanophosphonate, and a base, such as diisopropylethylamine. The reaction is carried out in a solvent, such as dichloromethane, for about 2 hours at room temperature. Deprotection of the piperazinyl group is accomplished with trifluoroacetic anhydride as described in Scheme 4, followed by reaction with an appropriate anhydride, such as succinic anhydride or maleic anhydride, in the presence of a suitable base such as diisopropylethylamine. Those skilled in the art will recognize that the same chemistry may be used to create compounds of Formula I where R¹ is <chemistry id="chem0060" num="0060"><img file="EP3663317B1_D0062.tif" /></chemistry><chemistry id="chem0061" num="0061"><img file="EP3663317B1_D0063.tif" /></chemistry>

0086Compounds of Formula I where R¹ is <chemistry id="chem0062" num="0062"><img file="EP3663317B1_D0064.tif" /></chemistry> may be made according to Scheme 5. The maleimide may be introduced by any method known in the art. Maleimide functionalizing groups such as 2,5-dioxopyrrolidin-1-yl 2-(2,5-dioxo-2,5-dihydro-1H-pyrrol-1-yl)acetate where m is 1, may be used in a solvent such as DMF or CH₂Cl₂, and a base, such as tributylamine or triethylamine. Alternatively, the deprotected piperazinyl group described in Scheme 4 may be elaborated with a maleimide functionality, as described in Scheme 5 to give compounds of Formula I where R¹ is <chemistry id="chem0063" num="0063"><img file="EP3663317B1_D0065.tif" /></chemistry> . Those skilled in the art will recognize that the same chemistry may be used to create compounds of Formula I where R² is <chemistry id="chem0064" num="0064"><img file="EP3663317B1_D0066.tif" /></chemistry><chemistry id="chem0065" num="0065"><img file="EP3663317B1_D0067.tif" /></chemistry>

0087Maleimide functionalized haptens wherein R¹ or R² is <chemistry id="chem0066" num="0066"><img file="EP3663317B1_D0068.tif" /></chemistry> may be conjugated to proteins according to the method shown in Scheme 6. Activation of protein lysine residues by acylation of the epsilon-nitrogen with N-succinimidyl S-acetylthioacetate (SATA), followed by subsequent hydrolysis of the S-acetyl group with hydroxylamine produces a nucleophilic sulfhydryl group. Conjugation of the sulfhydryl activated protein with the maleimide derivatized hapten (prepared as described in general scheme 3) proceeds via a Michael addition reaction. Suitable proteins are known to those skilled in the art and include keyhole limpet hemocyanin, bovine thyroglobulin, and ovalbumin. The same methodology may be used to conjugate proteins to maleimide functionalized haptens where R¹ or R² is <chemistry id="chem0067" num="0067"><img file="EP3663317B1_D0069.tif" /></chemistry><chemistry id="chem0068" num="0068"><img file="EP3663317B1_D0070.tif" /></chemistry>

0088Carboxylic acid functionalized haptens, wherein R¹ or R² is CH₂NHC(O)(CH₂)_mCO₂H, may be conjugated to proteins according to the method shown in Scheme 7. Reaction with N-hydroxysuccinimide and a suitable coupling agent, such as dicyclohexylcarbodiimide, and a base, such as tributyl amine, in a solvent such as DMF, at a temperature of about 20 °C, for about 18 hrs activates the carboxylic acid with the hydroxypyrrolidine-2,5-dione leaving group. The activated linker and hapten may then be conjugated to a protein in a solvent, such as a pH 7.5 phosphate buffer, at about 20 °C, for about 2.5 hours. Suitable proteins are known to those skilled in the art and include keyhole limpet hemocyanin, bovine thyroglobulin, and ovalbumin. The same methodology may be used to conjugate proteins to carboxylic acid functionalized haptens where R¹ or R² is <chemistry id="chem0069" num="0069"><img file="EP3663317B1_D0071.tif" /></chemistry>

ANTIBODIES

0089The present invention is directed to an isolated antibody or a binding fragment thereof, which specifcally binds to quetiapine, and which is generated in response to a conjugate of a compound of Formula I and an immunogenic carrier. The term "antibody" refers to a specific protein capable of binding an antigen or portion thereof (in accordance with this invention, capable of specifically binding to quetiapine). An antibody is produced in response to an immunogen which may have been introduced into a host, e.g., an animal or a human, by injection. The generic term "antibody" includes polyclonal antibodies, monoclonal antibodies, and antibody fragments.

0090"Antibody" or "antigen-binding antibody fragment" refers to an intact antibody, or a fragment thereof, that competes with the intact antibody for binding. Generally speaking, an antibody or antigen-binding antibody fragment, is said to specifically bind an antigen when the dissociation constant is less than or equal to 1 µM, preferably less than or equal to 100 nM and most preferably less than or equal to 10 nM. Binding can be measured by methods know to those skilled in the art, an example being the use of a BIAcore^™ instrument.

0091Antibody fragments comprise a portion of an intact antibody, preferably the antigen binding or variable region of the intact antibody. Binding fragments include Fab, Fab', F(ab')₂, and Fv fragments; diabodies; linear antibodies; single-chain antibody molecules; and multispecific antibodies formed from antibody fragments. An antibody other than a "bispecific" or "bifunctional" antibody is understood to have each of its binding sites identical.

0092As used herein, "epitope" includes any protein determinant capable of specific binding to an immunoglobulin or T-cell receptor. Epitopic determinants usually consist of chemically active surface groupings of molecules such as amino acids or sugar side chains and usually have specific three dimensional structural characteristics, as well as specific charge characteristics. Two antibodies are said to "bind the same epitope" if one antibody is shown to compete with the second antibody in a competitive binding assay, by any of the methods well known to those skilled in the art (such as the BIAcore^™ method referred to above). In reference to a hapten (such as quetiapine or other anti-psychotic drug), an antibody can be generated against the non-antigenic hapten molecule by conjugating the hapten to an immunogenic carrier. An antibody is then generated which recognizes an "epitope" defined by the hapten.

0093"Isolated" when used in the context of an antibody means altered "by the hand of man" from any natural state; i.e., that, if it occurs in nature, it has been changed or removed from its original environment, or both. For example, a naturally occurring antibody naturally present in a living animal in its natural state is not "isolated", but the same antibody separated from the coexisting materials of its natural state is "isolated", as the term is employed herein. Antibodies may occur in a composition, such as an immunoassay reagent, which are not naturally occurring compositions, and therein remain isolated antibodies within the meaning of that term as it is employed herein.

0094"Cross-reactivity" refers to the reaction of an antibody with an antigen that was not used to induce that antibody.

0095Preferably, the antibody of the subject invention will bind to the drug and any desired pharmacologically active metabolites. By altering the location of the attachment of the immunogenic carrier to the compounds of the invention, selectivity and cross-reactivity with metabolites can be engineered into the antibodies. For quetiapine, cross-reactivity with quetiapine metabolites such as N-desalkylquetiapine (norquetiapine), quatiapine sulfoxide, O-desalkylquetiapine or 7-hydroxy quetiapine may or may not be desirable. Antibodies may be generated that detect multiple ones of these drugs and/or metabolites, or antibodies may be generated that detect each separately (thus defining the antibody "specific binding" properties). An antibody specifically binds one or more compounds when its binding of the one or more compounds is equimolar or substantially equimolar.

0096Methods of producing such antibodies comprise inoculating a host with the conjugate described herein. Suitable hosts include, but are not limited to, mice, rats, hamsters, guinea pigs, rabbits, chickens, donkeys, horses, monkeys, chimpanzees, orangutans, gorillas, humans, and any species capable of mounting a mature immune response. The immunization procedures are well established in the art and are set forth in numerous treatises and publications including <i>"</i><nplcit id="ncit0038" npl-type="b"><text>The Immunoassay Handbook', 2nd Edition, edited by David Wild (Nature Publishing Group, 2000</text></nplcit>) and the references cited therein.

0097Preferably, an immunogen embodying features of the present invention is administered to a host subject, e.g., an animal or human, in combination with an adjuvant. Suitable adjuvants include, but are not limited to, Freund's adjuvant, powdered aluminum hydroxide (alum), aluminum hydroxide together with <i>Bordetella pertussis,</i> and monophosphoryl lipid A-synthetic trehalose dicorynomycolate (MPL-TDM).

0098Typically, an immunogen or a combination of an immunogen and an adjuvant is injected into a mammalian host by one or multiple subcutaneous or intraperitoneal injections. Preferably, the immunization program is carried out over at least one week, and more preferably, over two or more weeks. Polyclonal antibodies produced in this manner can be isolated and purified utilizing methods well know in the art.

0099Monoclonal antibodies can be produced by the well-established hybridoma methods of <nplcit id="ncit0039" npl-type="s"><text>Kohler and Milstein, e.g., Nature 256:495-497 (1975</text></nplcit>). Hybridoma methods typically involve immunizing a host or lymphocytes from a host, harvesting the monoclonal antibody secreting or having the potential to secrete lymphocytes, fusing the lymphocytes to immortalized cells, and selecting cells that secrete the desired monoclonal antibody.

0100A host can be immunized to elicit lymphocytes that produce or are capable of producing antibodies specific for an immunogen. Alternatively, the lymphocytes can be immunized <i>in vitro.</i> If human cells are desired, peripheral blood lymphocytes can be used, although spleen cells or lymphocytes from other mammalian sources are preferred.

0101The lymphocytes can be fused with an immortalized cell line to form hybridoma cells, a process which can be facilitated by the use of a fusing agent, e.g., polyethylene glycol. By way of illustration, mutant rodent, bovine, or human myeloma cells immortalized by transformation can be used. Substantially pure populations of hybridoma cells, as opposed to unfused immortalized cells, are preferred. Thus, following fusion, the cells can be grown in a suitable medium that inhibits the growh or survival of unfused, immortalized cells, for example, by using mutant myeloma cells that lack the enzyme hypoxanthine guanine phosphoribosyl transferase (HGPRT). In such an instance, hypoxanthine, aminopterin, and thymidine can be added to the medium (HAT medium) to prevent the growth of HGPRT-deficient cells while permitting hybridomas to grow.

0102Preferably, immortalized cells fuse efficiently, can be isolated from mixed populations by selection in a medium such as HAT, and support stable and high-level expression of antibody following fusion. Preferred immortalized cell lines include myeloma cell lines available from the American Type Culture Collection, Manassas, VA.

0103Because hybridoma cells typically secrete antibody extracellularly, the culture media can be assayed for the presence of monoclonal antibodies specific for the anti-psychotic drug. Immunoprecipitation of <i>in vitro</i> binding assays, for example, radiioimmunoassay (RIA) or enzyme-linked immunosorbent assay (ELISA), can be used to measure the binding specificity of monoclonal antibodies.

0104Monoclonal antibody-secreting hybridoma cells can be isolated as single clones by limiting dilution procedures and sub-cultured. Suitable culture media include, but are not limited to, Dulbecco's Modified Eagle's Medium, RPMI-1640, and polypeptide-free, polypeptide-reduced, or serum-free media, e.g., Ultra DOMA PF or HL-1, available from Biowhittaker, Walkersville, MD. Alternatively, the hybridoma cells can be grown <i>in vivo</i> as ascites.

0105Monoclonal antibodies can be isolated and/or purified from a culture medium or ascites fluid by conventional immunoglobulin (Ig) purification procedures including, but not limited to, polypeptide A-SEPHAROSE, hydroxylapatite chromatography, gel electrophoresis, dialysis, ammonium sulfate precipitation, and affinity chromatography.

0106Monoclonal antibodies can also be produced by recombinant methods such as are described in <patcit id="pcit0007" dnum="US4166452A"><text>U.S. Patent No. 4,166,452</text></patcit>. DNA encoding monoclonal antibodies can be isolated and sequenced using conventional procedures, e.g., using oligonucleotide probes that specifically bind to murine heavy and light antibody chain genes, preferably to probe DNA isolated from monoclonal antibody hybridoma cells lines secreting antibodies specific for anti-psychotic drugs.

0107Antibody fragments which contain specific binding sites for the anti-psychotic drug may also be generated. Such fragments include, but are not limited to, the F(ab')₂ fragments which can be produced by pepsin digestion of the antibody molecule and the Fab fragments which can be generated by reducing the disulfide bridges of the F(ab')₂ fragments. Alternatively, Fab expression libraries may be constructed to allow rapid and easy identification of monoclonal Fab fragments with the desired specificity (<nplcit id="ncit0040" npl-type="s"><text>Huse et al., Science 256:1270-1281 (1989</text></nplcit>)). Fab, Fv and ScFv antibody fragments can all be expressed in and secreted from <i>Escherichia coli,</i> allowing for the production of large amounts of these fragments. Alternatively, Fab'-SH fragments can be directly recovered from E. <i>coli</i> and chemically coupled to form F(ab')₂ fragments (<nplcit id="ncit0041" npl-type="s"><text>Carter et al., BioTechnology 10:163-167 (1992</text></nplcit>)). Other techniques for the production of antibody fragments are known to those skilled in the art. Single chain Fv fragments (scFv) are also envisioned (see <patcit id="pcit0008" dnum="US5761894A"><text>U.S. Patent Nos. 5,761,894</text></patcit> and <patcit id="pcit0009" dnum="US5587458A"><text>5,587,458</text></patcit>). Fv and sFv fragments are the only species with intact combining sites that are devoid of constant regions; thus, they are likely to show reduced non-specific binding. The antibody fragment may also be a "linear antibody" e.g., as described in <patcit id="pcit0010" dnum="US5642870A"><text>U.S. Patent No. 5,642,870</text></patcit>, for example. Such linear antibody fragments may be monospecific or bispecific.

ASSAY KITS AND DEVICES

0108An assay kit (also referred to as a reagent kit) can also be provided comprising an antibody as described above. A representative reagent kit may comprise an antibody that binds to the anti-psychotic drug, quetiapine, a complex comprising an analog of an anti-psychotic drug or a derivative thereof coupled to a labeling moiety, and may optionally also comprise one or more calibrators comprising a known amount of an anti-psychotic drug or a related standard.

0109The phrase "assay kit" refers to an assembly of materials and reagents that is used in performing an assay. The reagents can be provided in packaged combination in the same or in separate containers, depending on their cross-reactivities and stabilities, and in liquid or in lyophilized form. The amounts and proportions of reagents provided in the kit can be selected so as to provide optimum results for a particular application. An assay kit embodying features of the present invention comprises antibodies which specifically bind quetiapine. The kit may further comprise competitive binding partners of quetiapine and calibration and control materials.

0110The phrase "calibration and control material" refers to any standard or reference material containing a known amount of an analyte. A sample suspected of containing an analyte and the corresponding calibration material are assayed under similar conditions. The concentration of analyte is calculated by comparing the results obtained for the unknown specimen with the results obtained for the standard. This is commonly done by constructing a calibration curve.

0111Antibodies embodying features of the present invention can be included in a kit, container, pack, or dispenser together with instructions for their utilization. When the antibodies are supplied in a kit, the different components of the immunoassay may be packaged in separate containers and admixed prior to use. Such packaging of the components separately may permit long-term storage without substantially diminishing the functioning of the active components. Furthermore, reagents can be packaged under inert environments, e.g., under a positive pressure of nitrogen gas, argon gas, or the like, which is especially preferred for reagents that are sensitive to air and/or moisture.

0112Reagents included in kits embodying features of the present invention can be supplied in all manner of containers such that the activities of the different components are substantially preserved while the components themselves are not substantially adsorbed or altered by the materials of the container. Suitable containers include, but are not limited to, ampules, bottles, test tubes, vials, flasks, syringes, envelopes, e.g., foil-lined, and the like. The containers may be comprised of any suitable material including, but not limited to, glass, organic polymers, e.g., polycarbonate, polystyrene, polyethylene, etc., ceramic, metal, e.g., aluminum, metal alloys, e.g., steel, cork, and the like. In addition, the containers may comprise one or more sterile access ports, e.g., for access via a needle, such as may be provided by a septum. Preferred materials for septa include rubber and polytetrafluoroethylene of the type sold under the trade name TEFLON by DuPont (Wilmington, DE). In addition, the containers may comprise two or more compartments separated by partitions or membranes that can be removed to allow mixing of the components.

0113Reagent kits embodying features of the present invention may also be supplied with instructional materials. Instructions may be printed, e.g., on paper and/or supplied in an electronically-readable medium. Alternatively, instructions may be provided by directing a user to an internet website, e.g., specified by the manufacturer or distributor of the kit and/or via electronic mail.

0114The antibody may also be provided as part of an assay device. Such assay devices include lateral flow assay devices. A common type of disposable lateral flow assay device includes a zone or area for receiving the liquid sample, a conjugate zone, and a reaction zone. These assay devices are commonly known as lateral flow test strips. They employ a porous material, e.g., nitrocellulose, defining a path for fluid flow capable of supporting capillary flow. Examples include those shown in <patcit id="pcit0011" dnum="US5559041A"><text>US Patent Nos. 5,559,041</text></patcit>, <patcit id="pcit0012" dnum="US5714389A"><text>5,714,389</text></patcit>, <patcit id="pcit0013" dnum="US5120643A"><text>5,120,643</text></patcit>, and<patcit id="pcit0014" dnum="US6228660B"><text> 6,228,660</text></patcit>.

0115Another type of assay device is a non-porous assay device having projections to induce capillary flow. Examples of such assay devices include the open lateral flow device as disclosed in <patcit id="pcit0015" dnum="WO2003103835A"><text>PCT International Publication Nos. WO 2003/103835</text></patcit>, <patcit id="pcit0016" dnum="WO2005089082A"><text>WO 2005/089082</text></patcit>, <patcit id="pcit0017" dnum="WO2005118139A"><text>WO 2005/118139</text></patcit>, and <patcit id="pcit0018" dnum="WO2006137785A"><text>WO 2006/137785</text></patcit>.

0116In a non-porous assay device, the assay device generally has at least one sample addition zone, at least one conjugate zone, at least one reaction zone, and at least one wicking zone. The zones form a flow path by which sample flows from the sample addition zone to the wicking zone. Also included are capture elements, such as antibodies, in the reaction zone, capable of binding to the analyte, optionally deposited on the device (such as by coating); and a labeled conjugate material also capable of participating in reactions that will enable determination of the concentration of the analyte, deposited on the device in the conjugate zone, wherein the labeled conjugate material carries a label for detection in the reaction zone. The conjugate material is dissolved as the sample flows through the conjugate zone forming a conjugate plume of dissolved labeled conjugate material and sample that flows downstream to the reaction zone. As the conjugate plume flows into the reaction zone, the conjugated material will be captured by the capture elements such as via a complex of conjugated material and analyte (as in a "sandwich" assay) or directly (as in a "competitive" assay). Unbound dissolved conjugate material will be swept past the reaction zone into the at least one wicking zone. Such devices can include projections or micropillars in the flow path.

0117An instrument such as that disclosed in US Patent Publication Nos. <patcit id="pcit0019" dnum="US20060289787A1"><text>US20060289787A1</text></patcit> and <patcit id="pcit0020" dnum="US20070231883A1"><text>US 20070231883A1</text></patcit>, and <patcit id="pcit0021" dnum="US7416700B"><text>US Patent Nos. 7,416,700</text></patcit> and <patcit id="pcit0022" dnum="US6139800A"><text>6,139,800</text></patcit>, is able to detect the bound conjugated material in the reaction zone. Common labels include fluorescent dyes that can be detected by instruments which excite the fluorescent dyes and incorporate a detector capable of detecting the fluorescent dyes.

IMMUNOASSAYS

0118The antibodies thus produced can be used in immunoassays to recognize/bind to the anti-psychotic drug, thereby detecting the presence and/or amount of the drug in a patient sample. Preferably, the assay format is a competitive immunoassay format. Such an assay format and other assays are described, among other places, in <nplcit id="ncit0042" npl-type="b"><text>Hampton et al. (Serological Methods, A Laboratory Manual, APS Press, St. Paul, MN 1990</text></nplcit>) and <nplcit id="ncit0043" npl-type="s"><text>Maddox et al. (J. Exp. Med. 158:12111, 1983</text></nplcit>).

0119The term "analyte" refers to any substance or group of substances, the presence or amount of which is to be determined. Representative anti-psychotic drug analytes include, but are not limited to, risperidone, paliperidone, olanzapine, aripiprazole, and quetiapine.

0120The term "competitive binding partner" refers to a substance or group of substances, such as may be employed in a competitive immunoassay, which behave similarly to an analyte with respect to binding affinity to an antibody. Representative competitive binding partners include, but are not limited to, anti-psychotic drug derivatives and the like.

0121The term "detecting" when used with an analyte refers to any quantitative, semi-quantitative, or qualitative method as well as to all other methods for determining an analyte in general, and an anti-psychotic drug in particular. For example, a method that merely detects the presence or absence of an anti-psychotic drug in a sample lies within the scope of the present invention, as do methods that provide data as to the amount or concentration of the anti-psychotic drug in the sample. The terms "detecting", "determining", "identifying", and the like are used synonymously herein, and all lie within the scope of the present invention.

0122The antibodies of the invention can be used in a competitive immunoassay wherein antibodies which bind the anti-psychotic drug, or the drug or competitive binding partner thereof, are attached to a solid support (such as the reaction zone in a lateral flow assay device) and labeled drug or competitive binding partner thereof, or labeled antibody, respectively, and a sample derived from the host are passed over the solid support and the amount of label detected attached to the solid support can be correlated to a quantity of drug in the sample.

0123Any sample that is suspected of containing an analyte, e.g., an anti-psychotic drug, can be analyzed in accordance with the methods of the presently preferred embodiments. The sample can be pretreated if desired and can be prepared in any convenient medium that does not interfere with the assay. Preferably, the sample comprises an aqueous medium such as a body fluid from a host, most preferably plasma or serum.

0124It is to be understood that all manner of immunoassays employing antibodies are contemplated for use in accordance with the presently preferred embodiments, including assays in which antibodies are bound to solid phases and assays in which antibodies are in liquid media. Methods of immunoassays that can be used to detect analytes using antibodies embodying features of the present invention include, but are not limited to, competitive (reagent limited) assays wherein labeled analyte (analyte analog) and analyte in a sample compete for antibodies and single-site immunometric assays wherein the antibody is labeled; and the like.

0125The present invention is further described by the following examples. The examples are provided solely to illustrate the invention by reference to specific embodiments.

0126All examples were carried out using standard techniques, which are well known and routine to those of skill in the art, except where otherwise described in detail. Routine molecular biology techniques of the following examples can be carried out as described in standard laboratory manuals, such as <nplcit id="ncit0044" npl-type="b"><text>Sambrook et al., Molecular Cloning: A Laboratory Manual, 2nd Ed., Cold Spring Habor Laboratory Press, Cold Spring Harbor, NY (1989</text></nplcit>).

0127Copending applications entitled "Haptens of Aripiprazole" (Attorney Docket No. PRD3265USPSP, <patcit id="pcit0023" dnum="US61691450" dnum-type="L"><text>US Provisional Patent Appl. No. 61/691,450, filed August 21, 2012</text></patcit>), "Haptens of Olanzapine" (Attorney Docket No. PRD3266USPSP, <patcit id="pcit0024" dnum="US61691454" dnum-type="L"><text>US Provisional Patent Appl. No. 61/691,454, filed August 21, 2012</text></patcit>), "Haptens of Paliperidone" (Attorney Docket No. PRD3267USPSP, <patcit id="pcit0025" dnum="US61691459" dnum-type="L"><text>US Provisional Patent Appl. No. 61/691,459, filed August 21, 2012</text></patcit>), "Haptens of Quetiapine" (Attorney Docket No. PRD3268USPSP, <patcit id="pcit0026" dnum="US61691462" dnum-type="L"><text>US Provisional Patent Appl. No. 61/691,462, filed August 21, 2012</text></patcit>), "Haptens of Risperidone and Paliperidone" (Attorney Docket No. PRD3269USPSP, <patcit id="pcit0027" dnum="US61691469" dnum-type="L"><text>US Provisional Patent Appl. No. 61/691,469, filed August 21, 2012</text></patcit>), "Antibodies to Aripiprazole Haptens and Use Thereof" (Attorney Docket No. CDS5128USPSP, <patcit id="pcit0028" dnum="US61691544" dnum-type="L"><text>US Provisional Patent Appl. No. 61/691,544, filed August 21, 2012</text></patcit>), "Antibodies to Olanzapine Haptens and Use Thereof" (Attorney Docket No. CDS5132USPSP, <patcit id="pcit0029" dnum="US61691572" dnum-type="L"><text>US Provisional Patent Appl. No. 61/691,572, filed August 21, 2012</text></patcit>), "Antibodies to Paliperidone Haptens and Use Thereof" (Attorney Docket No. CDS5126USPSP, <patcit id="pcit0030" dnum="US61691634" dnum-type="L"><text>US Provisional Patent Appl. No. 61/691,634, filed August 21, 2012</text></patcit>), "Antibodies to Risperidone Haptens and Use Thereof" (Attorney Docket No. CDS5130USPSP, <patcit id="pcit0031" dnum="US61691615" dnum-type="L"><text>US Provisional Patent Appl. No. 61/691,615, filed August 21, 2012</text></patcit>), "Antibodies to Aripiprazole and Use Thereof" (Attorney Docket No. CDS5129USPSP, <patcit id="pcit0032" dnum="US61691522" dnum-type="L"><text>US Provisional Patent Appl. No. 61/691,522, filed August 21, 2012</text></patcit>), "Antibodies to Olanzapine and Use Thereof" (Attorney Docket No. CDS5133USPSP, <patcit id="pcit0033" dnum="US61691645" dnum-type="L"><text>US Provisional Patent Appl. No. 61/691,645, filed August 21, 2012</text></patcit>), "Antibodies to Paliperidone and Use Thereof" (Attorney Docket No. CDS5127USPSP, <patcit id="pcit0034" dnum="US61691692" dnum-type="L"><text>US Provisional Patent Appl. No. 61/691,692, filed August 21, 2012</text></patcit>), "Antibodies to Quetiapine and Use Thereof" (Attorney Docket No. CDS5135USPSP, <patcit id="pcit0035" dnum="US61691659" dnum-type="L"><text>US Provisional Patent Appl. No. 61/691,659, filed August 21, 2012</text></patcit>), "Antibodies to Risperidone and Use Thereof" (Attorney Docket No. CDS5131USPSP, <patcit id="pcit0036" dnum="US61691675" dnum-type="L"><text>US Provisional Patent Appl. No. 61/691,675, filed August 21, 2012</text></patcit>), and "Antibodies to Risperidone and Use Thereof" (Attorney Docket No. CDS5145USPSP, <patcit id="pcit0037" dnum="US61790880" dnum-type="L"><text>US Provisional Patent Appl. No. 61/790,880, filed March 15, 2013</text></patcit>).

EXAMPLE 1

2-(2-(2-(aminomethyl)-4-(dibenzo[b,f][1,4]thiazepin-11-yl)piperazin-1-yl)ethoxy)ethanol

Step A

Piperazine-2-carbonitrile

0128<chemistry id="chem0070" num="0070"><img file="EP3663317B1_D0072.tif" /></chemistry>

0129A stirred solution of tetrahydrofuran (300 mL) and ethylenediamine (108.2 g) at 30 °C was treated dropwise with 2-chloroacrylonitrile (105.0 g) over a period of 2 hours and stirred for 6 additional hours at 30 °C. The reaction mixture was cooled to 20 °C and a precipitate formed. The reaction was filtered, and the filtrate was adjust pH to 4 by adding 35% hydrochloric acid. The resulting precipitate was collected by filtration. The combined precipitates were dissolved in 20% hydrochloric acid solution and then poured into THF solution to precipitate the title compound, which was dried under reduced pressure and used in the next reaction without additional purification. ¹H NMR: (D₂O, 400 MHz): δ (ppm) 5.00-4.97 (m, 1H), 3.79 (d, J=4.8 Hz, 2H), 3.62-3.44 (m, 4H).

Step B

tert-Butyl 3-cyanopiperazine-1-carboxylate

0130<chemistry id="chem0071" num="0071"><img file="EP3663317B1_D0073.tif" /></chemistry>

0131To a solution of compound piperazine-2-carbonitrile, prepared as described in the previous step, (90.6 g, 0.492 mol) was added triethylamine (206 mL, 1.476 mol) and Boc₂O (117 g, 0.542 mol). The reaction mixture was stirred at room temperature overnight, and then concentrated. The residue was purified by silica gel chromatography to provide the title compound.

0132¹H NMR: (CDCl₃, 400 MHz): δ (ppm) 4.06-3.91 (m, 3H), 3.28-2.83 (m, 4H), 1.47 (s, 9H).

Step C

tert-Butyl 3-cyano-4-(2-(2-hydroxyethoxy)etlyl)piperazine-1-carboxylate

0133<chemistry id="chem0072" num="0072"><img file="EP3663317B1_D0074.tif" /></chemistry>

0134A solution of tert-butyl 3-cyanopiperazine-1-carboxylate, prepared as described in the previous step, (10 g, 0.047 mol) and 2-(2-hydroxyethoxy)acetaldehyde (14.8 g) (see: <nplcit id="ncit0045" npl-type="s"><text>Bodin, A.,Contact Dermatitis, 2001,44:207</text></nplcit>) in dichloromethane was treated with formic acid (12.7 g), and the reaction mixture was stirred at room temperature overnight. Sodium cyanoborohydride (7.2 g, 0.118mol) was added in portions. The reaction mixture was stirred at room temperature for 3 hours followed by the addition of water and extraction with dichloromethane. The organic layer was washed with brine, dried over sodium sulfate, filtered, and concentrated. The crude product was purified by column chromatography to provide the product.

0135¹H NMR: (CDCl₃, 400 MHz): δ (ppm) 4.15 (s, 1H), 3.69-3.63 (m, 4H), 3.58 (d, J=4.4 Hz, 2H), 3.47-3.44 (m, 4H), 2.61 (d, J=5.2 Hz, 2H), 2.51-2.48 (m, 4H), 1.43 (s, 9H).

Step D

tert-Butyl 3-(aminomethyl)-4-(2-(2-hydroxyethoxy)ethyl)piperazine-1-carboxylate

0136<chemistry id="chem0073" num="0073"><img file="EP3663317B1_D0075.tif" /></chemistry>

0137To a solution of tert-butyl 3-cyano-4-(2-(2-hydroxyethoxy)ethyl)piperazine-1-carboxylate, prepared as described in the previous step, (9.9 g, 33.1 mmol) in methanol (20 mL) was added Raney Ni (15 g). The reaction solution was stirred at room temperature overnight under hydrogen atmosphere (50 psi). The mixture was filtered and concentrated to provide the product, which was used in the next step without additional purification,

0138ESI-MS (M+1): 304 calc. for C₁₄H₂₉N₃O₄ 303.

Step E

tert-Butyl 4-(2-(2-hydroxyethoxy)ethyl)-3-((2,2,2-trifluoroacetamido)methyl)piperazine-1-carboxylate

0139<chemistry id="chem0074" num="0074"><img file="EP3663317B1_D0076.tif" /></chemistry>

0140To a solution of tert-butyl 3-(aminomethyl)-4-(2-(2-hydroxyethoxy)ethyl)piperazine-1-carboxylate, prepared as described in the previous step (8.8 g) in dichloromethane (100 mL) was added triethylamine (8.8 g, 87.0 mmol) and trifluoroacetic anhydride (6.1 g, 29.0 mmol). The reaction mixture was stirred at room temperature for 12h, diluted with dichlorornethane and washed with water. The organic layer was washed with brine, dried over sodium sulfate, filtered, and concentrated to give the crude product which was purified by column chromatography to provide the title compound.

0141ESI-MS (M+1): 400 calc. for C₁₆H₂₈F₃N₃O₅ 399.

Step F

2,2,2-Trifluoro-N-((1-(2-(2-hydroxyethoxy)ethyl)piperazin-2-yl)methyl)acetamide

0142<chemistry id="chem0075" num="0075"><img file="EP3663317B1_D0077.tif" /></chemistry>

0143A solution of tert-butyl 4-(2-(2-hydroxyethoxy)ethyl)-3-((2,2,2-trifluoroacetamido)methyl)piperazine-1-carboxylate, prepared as described in the previous step, (8.6 g, crude) in methanolic hydrogen chloride (20 mL) was stirred at room temperature for 1 hour, followed by concentration to provide the title compound which was used without further purification.

0144ESI-MS (M+1): 300 calc. for C₁₁H₂₀F₃N₃O₃ 299.

Step G

2-((2-Nitrophenyl)thio)benzoic acid

0145<chemistry id="chem0076" num="0076"><img file="EP3663317B1_D0078.tif" /></chemistry>

0146To a solution of 2-mercapto-benzoic acid (30 g, 0.195 mol) in isopropanol (500 mL) at room temperature were added 1-fluoro-2-nitro-benzene (30.2 g, 0.214 mol), water (100 ml) and potassium hydroxide (31.1 g, 0.555 mol). The reaction mixture was stirred at room temperature overnight, quenched with water and diluted with ethyl acetate. The aqueous phase was extracted with ethyl acetate (3 x 400 mL) and the combined organic extracts were washed with saturated aqueous sodium chloride (500 mL), dried over magnesium sulfate, filtered, and concentrated. The crude residue was purified by flash column chromatography on silica gel to give the title compound. ESI-MS (M+1): 276 calc. for C₁₃H₉NO₄S 275. ¹H NMR: (CDCl₃, 400 MHz): δ (ppm) 8.12-8.07 (m, 2H), 7.54-7.43 (m, 2H), 7.42-7.39 (m, 2H), 7.35-7.31 (m, 1H), 7.12-7.09 (m, 1 H).

Step H

2-((2-Aminophenyi)thio)benzoic acid

0147<chemistry id="chem0077" num="0077"><img file="EP3663317B1_D0079.tif" /></chemistry>

0148To a solution of 2-((2-nitrophenyl)thio)benzoic acid, prepared as described in the previous step, (43.3 g, 0.157 mol) in ethyl acetate (500 mL) was added Pd/C (8 g). The reaction solution was stirred at room temperature overnight under hydrogen gas atmosphere. The mixture was filtered and concentrated to provide the title compound. ESI-MS (M+1): 246 calc. for C₁₃H₁₁NO₂S 245. ¹H NMR: (CDCl₃, 400 MHz): δ (ppm) 8.20-8.17 (m, 1H), 7.51-7.48 (m, 1H), 7.36-7.30 (m, 2H), 7.21-7.17 (m, 1H), 6.88-6.80 (m, 3H).

Step I

Dibenzo[b,fl[1,4]thiazepin-11(10H)-one

0149<chemistry id="chem0078" num="0078"><img file="EP3663317B1_D0080.tif" /></chemistry>

0150To a solution of 2-((2-aminophenyl)thio)benzoic acid, prepared as described in the previous step, (30 g, 0.122mol) in dichloromethane (300 mL) was added EDCl (35.2 g, 0.183 mol), triethylamine (51 mL, 0.366 mol) and HOBT (24.7 g, 0.183 mol). The reaction mixture was stirred at room temperature for 12 hours, washed with 1M aq.HCl, saturated aqueous sodium bicarbonate, saturated aqueous sodium chloride, and dried over MgSO₄. The solution was filtered, concentrated, and purified by column chromatography to provide the title compound. ESI-MS (M+1): 228 calc. for C₁₃H₉NOS 227. ¹H NMR: (CDCl₃, 400 MHz): δ (ppm) 7.70-7.67 (m, 1H), 7.58-7.52 (m, 2H), 7.50-7.42 (m, 2H), 7.39-7.35 (m, 1H), 7.24-7.22 (m, 1H), 7.17-7.13 (m, 1H).

Step J

11-Chlorodibenzo[b,f][1,4]thiazepine

0151<chemistry id="chem0079" num="0079"><img file="EP3663317B1_D0081.tif" /></chemistry>

0152A solution of dibenzo[b,f][1,4]thiazepin-11(10H)-one, prepared as described in the previous step, (14.6 g, 64 mmol) in phosphorus oxychloride (20 mL) was heated to reflux for 2 hours. The mixture was concentrated to provide the crude product which was used directly without further purification. ESI-MS (M+1): 246 calc. for C₁₃H₈ClNS 245.

Step K

N-((4-(Dibenzo[b,f][1,4]thiazepin-11-yl)-1-(2-(2-hydroxyethoxy)ethyl)piperazin-2-yl)metliyl)-2,2,2-trifluoroacetamide

0153<chemistry id="chem0080" num="0080"><img file="EP3663317B1_D0082.tif" /></chemistry>

0154To a solution of 11-chlorodibenzo[b,f][1,4]thiazepine, prepared as described in the previous step, (2 g, crude) in dioxane (20 mL) was added Pd₂(dba)₃ (327 mg, 0.357 mmol), BINAP (225 mg, 0.357 mmol), triethylamine (6 mL, 42.9 mmol) and 2,2,2-trifluoro-N-((1-(2-(2-hydroxyethoxy)ethyl)piperazin-2-yl)methyl)acetamide, prepared as described as Step F, (2.4 g, crude). The resulting mixture was heated to reflux overnight under nitrogen atmosphere, filtered through CELITE^™, and concentrated. The residue was purified by silica gel chromatography to provide the title compound. ESI-MS (M+1): 509 calc. for C₂₄H₂₇F₃N₄O₃S 508.

Step L

2-(2-(2-(Aminomethyl)-4-(dibenzo[b,f][1,4]thiazepin-11-yl)piperazin-1-yl)ethoxy)ethanol

0155<chemistry id="chem0081" num="0081"><img file="EP3663317B1_D0083.tif" /></chemistry>

0156A mixture of N-((4-(dibenzo[b,f][1,4]thiazepin-11-yl)-1-(2-(2-hydroxyethoxy)ethyl)piperazin-2-yl)methyl)-2,2,2-trifluoroacetamide, prepared as described in the previous step, (2.0 g) and aqueous potassium carbonate (5%) (15 mL) in methanol (20 mL) was stirred at room temperature for 18 hours and extracted with ethyl acetate. The organic layers were washed with saturated aqueous sodium chloride, dried over sodium sulfate, filtered, evaporated to give the crude product which was purified by column chromatography, and followed by prep-HPLC to provide the title compound as a yellow solid. ESI-MS (M+1): 413 calc. for C₂₂H₂₈N₄O₂S 412. ¹H NMR: (CDCl₃, 400 MHz): δ (ppm) 7.52-7.50 (m, 1H), 7.41-7.31 (m, 4H), 7.17-7.12 (m, 1H), 7.02-7.00 (m, 1H), 6.89-6.84 (m, 1H), 3.66-3.59 (m, 5H), 3.54-3.51 (m, 2H), 3.49-3.38 (m, 1H), 3.19-3.12 (m, 1H), 3.03-2.88 (m, 2H), 2.79-2.53 (m, 5H).

EXAMPLE 2

N-((4-(Dibenzo[b,f][1,4]thiazepin-11-yl)-1-(2-(2-hydroxyethoxy)ethyl)piperazin-2-yl)methyl)-2-(2,5-dioxo-2,5-diliydro-1H-pyrrol-1-yl)acetamide

0157<chemistry id="chem0082" num="0082"><img file="EP3663317B1_D0084.tif" /></chemistry>

0158To a solution of 2-(2-(2-(aminomethyl)-4-(dibenzo[b,f][1,4]thiazepin-11-yl)piperazin-1-yl)ethoxy)ethanol, prepared as described in Example 1, (7.8 mg, 19.0 µmoles) in 410 µL of DMF and 8.9 µL of tributylamine was added 480 µL of a DMF solution of N-(α-maleimidoacetoxy) succinimide ester (AMAS, 10 mg/mL, 4.8 mg, 19.0 µmoles). The resulting solution was allowed to stir for 60 minutes at 20 °C, then used as such in conjugation reaction with thiol-activated protein.

EXAMPLE 3

2-12-[4-(3-Aminomethyl-dibenzo[b,f][1,4]thiazepin-11-yl)-piperazin-1-yl]-ethoxyl-ethanol

0159<chemistry id="chem0083" num="0083"><img file="EP3663317B1_D0085.tif" /></chemistry>

Step A

11-Oxo-10, 11-dihydrodibenzo[b,f][1,4]thiazephe-3-carboxylic acid

0160<chemistry id="chem0084" num="0084"><img file="EP3663317B1_D0086.tif" /></chemistry>

0161A mixture of 2-amino-benzenethiol (1.34 mL, 12.5 mmol), 2-bromo-terephthalic acid (1.54 g, 6.3 mmol), cuprous oxide (0.50 g, 3.5 mmol), quinoline (6.3 mL), and pyridine (0.63 mL) was heated in a 180 °C oil bath under nitrogen for 20 hours, then cooled to room temperature. Concentrated hydrochloric acid (20 mL) was added slowly while cooling in cold water, with stirring. The resulting precipitate was filtered, washed with water, and dried to give crude title compound (2 g). LC-MS: m/z 270 (M-1).

Step B

11-Chloro-dibenzo[b,f][1,4]thiazepine-3-carbonyl chloride

0162<chemistry id="chem0085" num="0085"><img file="EP3663317B1_D0087.tif" /></chemistry>

0163To a suspension of 11-oxo-10,11-dihydrodibenzo[b,f][1,4]thiazepine-3-carboxylic acid, prepared as described in the previous step, (0.41 g) in toluene (6.5 mL) was added DMF (0.125 mL) and thionyl chloride (6.5 mL). The mixture was heated in an 80 °C oil bath under nitrogen over night. The resulting solution was concentrated to dryness. The crude product was used for next step.

Step C

11-Chloro-dibenzo[b,f][1,4]thiazepine-3-carboxylic acid amide

0164<chemistry id="chem0086" num="0086"><img file="EP3663317B1_D0088.tif" /></chemistry>

0165A solution of 11-chloro-dibenzo[b,f][1,4]thiazepine-3-carbonyl chloride, prepared as described in the previous step, ( ca 1.5 mmol) in dichloromethane (10 mL) was treated with a 1,4-dioxane solution of ammonia (0.5 M, 9 mL) under ice bath. The resulting suspension was stirred at room temperature for 1 hour, and the reaction was quenched with water (10 mL). The resulting precipitate was filtered, washed with water and dichloromethane, and dried. The organic layer of the filtrate was washed with saturated aqueous sodium bicarbonate solution and concentrated to additional off white product, which was used in the next step without additional purification. LC-MS: m/z 289 (M+1). ¹H NMR (DMSO-d₆, 400 MHz): δ (ppm) 8.19 (br, 1H), 8.00-7.96 (m, 2H), 7.90 (d, 1H), 7.64 (br, 1H), 7.56 (m, 1H), 7.47 (m, 1 H), 7.31 (m, 2H).

Step D

11-{4-[2-(2-Hydroxy-ethoxy)-ethyl]-piperazin-1-yl}-dibenzo[b,f][1,4]thiazepine-3-carboxylic acid amide

0166<chemistry id="chem0087" num="0087"><img file="EP3663317B1_D0089.tif" /></chemistry>

0167To a solution of 11-chloro-diberizo[b,f][1,4]thiazepine-3-carboxylic acid amide, prepared as described in the previous step, (0.40 g) in DMF (1.5 mL) and toluene (1.5 mL) was added 2-(2-piperazin-1-yl-ethoxy)-ethanol (0. 50 g, 2.9 mmol). The solution was heated in a 110 °C oil bath under nitrogen for 5 hours, concentrated, and purified (silica gel, 2-5% methanol-dichloromethane containing ammonia eluent) to give the title compound as an off white solid. LC-MS: m/z 427 (M+1).

Step E

2-{2-[4-(3-Aminomethyl-dibenzo[b,f][1,4]thiazepin-11-yl)-piperazin-1-yl]-ethoxy}-ethanol

0168<chemistry id="chem0088" num="0088"><img file="EP3663317B1_D0090.tif" /></chemistry>

0169To a solution of 2-{2-[4-(3-aminomethyl-dibenzo[b,f][1,4]thiazepin-11-yl)-piperazin-1-yl]-ethoxy}-ethanol, prepared as described in the previous step, (0.24 g, 0.56 mmol) in THF (15 mL) was added 1M lithium aluminum hydride THF solution (6 mL, 6 mmol). The white suspension was heated in a 70 °C oil bath under nitrogen for 2 hours. The reaction suspension was quenched with slow addition of saturated aqueous sodium sulfate solution under ice bath. The solution phase was separated, and solid was extracted with THF (5 X 10 mL). The combined organic phases were concentrated and purified (silica gel, 2-5% methanol-dichloromethane containing ammonia eluent) to give the title compound as an off white solid. LC-MS: m/z 413 (M+1). ¹H NMR (CDCl₃, 400 MHz) δ (ppm) 7.47 (s, 1H), 7.38 (m, 1H), 7.26 (m, 2H, overlapped with solvent), 7.17 (m, 1H), 7.06 (m, 1H), 6.88 (m, 1H), 3.85 (s, 2H), 3.76-3.46 (m, 11H, containing exchangeable protons), 2.66-2.57 (m, 8H).

EXAMPLE 4

2-(2,5-dioxo-2,5-dihydro-1H-pyrrol-1-yl)-N-((11-(4-(2-(2-hydroxyethoxy)ethyl)piperazin-1-yl)dibenzo[b,f][1,4]thiazepin-3-yl)methyl)acetamide

0170<chemistry id="chem0089" num="0089"><img file="EP3663317B1_D0091.tif" /></chemistry>

0171To a solution of 2-{2-[4-(3-aminomethyl-dibenzo[b,f][1,4]thiazepin-11-yl)-piperazin-1-yl]-ethoxy}-ethanol, prepared as described in Example 3, (5.6 mg, 13.6 µmoles) in 295 µL of DMF and 6.4 µL of tributylarnine was added 340 µL of a DMF solution of N-(α-maleimidoacetoxy)succinimide ester (AMAS, 10 mg/mL, 3.4 mg, 13.6 µmoles). The resulting solution was allowed to stir for 60 minutes at 20 °C, then used as such in conjugation reaction with thiol-activated protein.

EXAMPLE 5

N-((4-(dibenzo[b,f][1,4]thiazepin-11-yl)-1-(2-(2-hydroxyethoxy)ethyl)piperazin-2-yl)methyl)-2-(2,5-dioxo-2,5-dihydro-1H-pyrrol-1-yl)acetamide-bovine thyroglobulin-conjugate

Step A

Bovine Thyroglobulin (BTG) reaction with SATA:

0172To 3.0 mL of a solution of bovine thyroglobulin (BTG, 20.0 mg, 0.03 µmoles) in 100 mM phosphate buffer pH 7.5 was added 276.0 µL of a DMF solution of N-succinimidyl-S-acetylthioacetate (SATA, 25 mg/mL, 6.9 mg, 30.0 µmoles). The resulting solution was incubated at 20 °C for 1 hour on a roller mixer. The reaction was purified on a Sephadex G-25 column using 100 mM phosphate buffer, 5 mM EDTA, at pH 6.0. To 6.0 mL of BTG-SATA (18.0 mg, 0.027 µmoles ) was added 600 µL of 2.5 M hydroxylamine, 50 mM EDTA, pH 7.0. The resulting solution was incubated at 20 °C for 1 hour on a roller mixer.

Step B

0173To an aliquot of BTG-SH solution, prepared as described in the previous step, 6.6mL, 0.027 µmoles) was added an aliquot of the solution prepared in Example 2 (898.9 µL, 19.0 µmοles). The resulting cloudy mixture was incubated for 3 hours at 20 °C on a roller mixer. The reaction was filtered through a 0.45 µm syringe filter, then purified on a Sephadex G-25 column using 100 mM phosphate buffer, 0.14M sodium chloride, at pH 7.4.

EXAMPLE 6

2-(2,5-dioxo-2,5-dihydro-1H-pyrrol-1-yl)-N-((11-(4-(2-(2-hydroxyethoxy)ethyl)piperazin-1-yl)dibenzo[b,f][1,4]thiazepin-3-yl)methyl)acetamide-bovine thyroglobulin-conjugate

0174To an aliquot of BTG-SH solution, prepared as described in Example 5 Step A, (3.4mL, 0.014 µmoles) was added 641.4 µL of 2-(2,5-dioxo-2,5-dihydro-1H-pyrrol-1-yl)-N-((11-(4-(2-(2-hydroxyethoxy)ethyl)piperazin-1-yl)dibenzo[b,f][1,4]thiazepin-3-yl)methyl)acetamide, prepared as described in Example 4, (13.6 µmoles). The resulting cloudy mixture was incubated for 3 hours at 20 °C on a roller mixer. The reaction was purified on a Sephadex G-25 column using 100 mM phosphate buffer, 0.14M sodium chloride, at pH 7.4.

EXAMPLE 7

N-((4-(dibenzo[b,f][1,4]thiazepin-11-yl)-1-(2-(2-hydroxyethoxy)ethyl)piperazin-2-yl)methyl)-2-(2,5-dioxo-2,5-dihydro-1H-pyrrol-1-yl)acetamide-keyhole limpet hemocyanin-conjugate

Step A

Keyhole Limpet Hemocyanin (KLH) reaction with SATA

0175To a 3.18 mL solution of keyhole limpet hemocyanin (KLH, 15.6 mg, 0.156 µmoles) in 100 mM phosphate buffer, 0.46M sodium chloride, at pH 7.4 was added 72.1 µL of a DMF solution of N-succinimidyl-S-acetylthioacetate (SATA, 25 mg/mL, 1.8 mg, 7.80 µmoles). The resulting solution was incubated at 20 °C for 1 hour on a roller mixer. The reaction was purified on a Sephadex G-25 column using 100 mM phosphate buffer, 0.46 M sodium chloride, 5 mM EDTA, at pH 6.0. To 6.27 mL of the resulting KLH-SATA solution (13.3 mg, 0.133 µmοles) was added 627 µL of 2.5M hydroxylamine, 50 mM EDTA, at pH 7.0. The resulting solution was incubated at 20 °C for 1 hour on a roller mixer. The reaction was used as such in conjugation reaction with maleimide-activated hapten.

Step B

0176To an aliquot of KLH-SH solution, prepared as described in the previous step, (6.9mL, 0.133 µmoles) was added an aliquot of the solution prepared in Example 2, (624.3 µL, 13.3 µmoles). The resulting cloudy mixture was incubated for 3 hours at 20 °C on a roller mixer. The reaction was filtered through a 0.45 µm syringe filter then purified on a Sephadex G-25 column using 100 mM phosphate buffer, 0.46M sodium chloride, at pH 7.4.

EXAMPLE 8

2-(2,5-dioxo-2,5-dihydro-1H-pyrrol-1-yl)-N-((11-(4-(2-(2-hydroxyethoxy)ethyl)piperazin-1-yl)dibenzo[b,f][1,4]thiazepin-3-yl)methyl)acetamide-keyhole limpet hemocyanin-conjugate

0177To an aliquot of the KLH-SH solution, prepared as described in Example 7 Step A (3.2mL, 0.061 µmoles) was added an aliquot of the solution prepared in Example 4 (283.0 µL, 6.10 µmoles). The resulting cloudy mixture was incubated for 3 hours at 20 °C on a roller mixer. The reaction was purified on a Sephadex G-25 column using 100 mM phosphate buffer, 0.46M sodium chloride, at pH 7.4.

EXAMPLE 9

0178Competitive Immunoassays for Quetiapine and Multiplex Competitive Immunoassay for Aripiprazole, Olanzapine, Quetiapine, and Risperidone/Paliperidone

0179Following a series of immunizations with quetiapine immunogens, mouse tail bleeds were tested for reactivity using an ELISA. Hybridoma supernatants were also tested, and the ELISA data shown in Tables 8 and 9 below shows reactivity of several hybridomas (fusion partner was NSO cells). <tables id="tabl0008" num="0008"><table frame="all"><title>Table 8</title><tgroup cols="6"><colspec colnum="1" colname="col1" colwidth="23mm" /><colspec colnum="2" colname="col2" colwidth="15mm" /><colspec colnum="3" colname="col3" colwidth="15mm" /><colspec colnum="4" colname="col4" colwidth="15mm" /><colspec colnum="5" colname="col5" colwidth="15mm" /><colspec colnum="6" colname="col6" colwidth="18mm" /><tbody valign="middle"><row><entry /><entry /><entry /><entry /><entry /><entry /></row></tbody></tgroup><tgroup cols="6"><colspec colnum="1" colname="col1" colwidth="23mm" /><colspec colnum="2" colname="col2" colwidth="15mm" /><colspec colnum="3" colname="col3" colwidth="15mm" /><colspec colnum="4" colname="col4" colwidth="15mm" /><colspec colnum="5" colname="col5" colwidth="15mm" /><colspec colnum="6" colname="col6" colwidth="18mm" /><thead valign="middle"><row><entry align="right">Dilution</entry><entry align="center">9</entry><entry align="center">10</entry><entry align="center">11</entry><entry align="center">12</entry><entry align="center" /></row></thead><tbody valign="middle"><row rowsep="0"><entry align="right">400</entry><entry morerows="7" rowsep="1" align="center">79</entry><entry morerows="7" rowsep="1" align="center">89</entry><entry morerows="7" rowsep="1" align="center">90</entry><entry morerows="7" rowsep="1" align="center">95</entry><entry morerows="7" rowsep="1" align="center">Cmpd # 9</entry></row><row><entry align="right">400</entry></row><row><entry align="right">1200</entry></row><row rowsep="0"><entry align="right">1200</entry></row><row><entry align="right">3600</entry></row><row><entry align="right">3600</entry></row><row rowsep="0"><entry align="right">10800 10800</entry></row><row><entry rowsep="0" align="right">10800</entry></row><row><entry /><entry /><entry /><entry /><entry /><entry /></row><row><entry>BI Sub</entry><entry align="right">1.5858</entry><entry align="right">1.3168</entry><entry align="right">1.4302</entry><entry align="right">0.0533</entry><entry morerows="7" align="center">Cmpd # 9</entry></row><row><entry /><entry align="right">1.5111</entry><entry align="right">1.0627</entry><entry align="right">1.2186</entry><entry align="right">0.0427</entry></row><row><entry /><entry align="right">0.5578</entry><entry align="right">0.4213</entry><entry align="right">0.598</entry><entry align="right">0.0219</entry></row><row><entry /><entry align="right">0.554</entry><entry align="right">0.4447</entry><entry align="right">0.5353</entry><entry align="right">0.0233</entry></row><row><entry /><entry align="right">0.1932</entry><entry align="right">0.1582</entry><entry align="right">0.1868</entry><entry align="right">0.0154</entry></row><row rowsep="0"><entry /><entry align="right">0.171</entry><entry align="right">0.2111</entry><entry align="right">0.1838</entry><entry align="right">0.0132</entry></row><row><entry /><entry align="right">0.0736</entry><entry align="right">0.0722</entry><entry align="right">0.0733</entry><entry align="right">0.0107</entry></row><row><entry /><entry align="right">0.0884</entry><entry align="right">0.0774</entry><entry align="right">0.086</entry><entry align="right">0.0107</entry></row></tbody></tgroup></table></tables><tables id="tabl0009" num="0009"><img file="EP3663317B1_D0092.tif" /></tables>

0180Supernatant was then tested by competition ELISA to determine if the signals were specific to quetiapine. <figref idref="f0001">Figs. 1 and 2</figref> show the results from representative hybridomas. Data shows specific reactivity to quetiapine.

0181<figref idref="f0002">Fig. 3</figref> shows the competitive immunoassay format used on a lateral flow assay device in which the capture antibody, a quetiapine clone, was deposited on a chip along with a detection conjugate consisting of quetiapine conjugated to a fluorophore. In this competitive format as show in <figref idref="f0002">Fig. 3</figref>, a low level of analyte (quetiapine) results in high signal, whereas a high level of analyte (quetiapine) results in low signal. The amount of quetiapine in the sample can be calculated from the loss of fluorescence compared to a control sample with no drug present. A typical dose response curve generated with quetiapine sub-clones 89-3, 89-13, and 89-5 is shown in <figref idref="f0002">Fig. 4</figref>.

0182<figref idref="f0003">Fig. 5</figref> shows the chip design of a lateral flow assay device according to one embodiment of the subject invention. The device includes a zone or area for receiving the sample, a conjugate zone (which contains desired labeled competitive binding partner(s)), and a reaction zone (eight areas within the reaction zone are indicated; each area can contain a separate desired antibody). Sample flows from the sample zone through the conjugate zone and to the reaction zone.

0183<figref idref="f0003 f0004 f0005">Figs. 6-9</figref> show typical dose response curves for an aripiprazole positive control (sample containing aripiprazole) generated with antibody 5C7 deposited in reaction zone 2 and a labeled aripiprazole competitive binding partner in the conjugate zone (<figref idref="f0003">Fig. 6</figref>), an olanzapine positive control (sample containing olanzapine) generated with antibody 4G9-1 deposited in reaction zone 4 and a labeled olanzapine competitive binding partner in the conjugate zone (<figref idref="f0004">Fig. 7</figref>), a quetiapine positive control (sample containing quetiapine) generated with antibody 11 deposited in reaction zone 6 and a labeled quetiapine competitive binding partner in the conjugate zone (<figref idref="f0004">Fig. 8</figref>), and a risperidone positive control (sample containing risperidone) generated with antibody 5-9 deposited in reaction zone 8 and a labeled risperidone competitive binding partner in the conjugate zone (<figref idref="f0005">Fig. 9</figref>). The labeled competitive binding partners in the conjugate zone compete with the drugs present in the samples for binding to the antibodies. The amount of label is detected and is an indication of the amount of drug present in the sample (the amount of signal being inversely proportional to the amount of drug in the sample - see <figref idref="f0002">Fig. 3</figref>).

0184In order to confirm that conjugates of labeled competitive binding partners do not bind to antibodies deposited in the reaction zones, negative controls were conducted by using samples containing no drugs. Referring to Table 10, a sample containing no aripiprazole is deposited in the sample zone and moves by capillary action through the conjugate zone (this time containing labeled olanzapine, labeled quetiapine, and labeled risperidone, but no labeled aripiprazole) and to the reaction zone. The reaction zone again contains aripiprazole antibody (5C7) in reaction zone 2. Table 10 below shows the results, confirming that there is no dose response and the olanzapine, quetiapine, and risperidone conjugates that move by capillary action through the reaction zone do not bind to the aripiprazole antibody. <tables id="tabl0010" num="0010"><img file="EP3663317B1_D0093.tif" /></tables>

0185Referring to Table 11, a sample containing no olanzapine is deposited in the sample zone and moves by capillary action through the conjugate zone (this time containing labeled aripiprazole, labeled quetiapine, and labeled risperidone, but no labeled olanzapine) and to the reaction zone. The reaction zone again contains olanzapine antibody (4G9-1) in reaction zone 4. Table 11 below shows the results, confirming that there is no dose response and the aripiprazole, quetiapine, and risperidone conjugates that move by capillary action through the reaction zone do not bind to the olanzapine antibody. <tables id="tabl0011" num="0011"><img file="EP3663317B1_D0094.tif" /></tables>

0186Referring to Table 12, a sample containing no quetiapine is deposited in the sample zone and moves by capillary action through the conjugate zone (this time containing labeled aripiprazole, labeled olanzapine, and labeled risperidone, but no labeled quetiapine) and to the reaction zone. The reaction zone again contains quetiapine antibody (11) in reaction zone 6. Table 12 below shows the results, confirming that there is no dose response and the aripiprazole, olanzapine, and risperidone conjugates that move by capillary action through the reaction zone do not bind to the quetiapine antibody. <tables id="tabl0012" num="0012"><img file="EP3663317B1_D0095.tif" /></tables>

0187Referring to Table 13, a sample containing no risperidone is deposited in the sample zone and moves by capillary action through the conjugate zone (this time containing labeled aripiprazole, labeled olanzapine, and labeled quetiapine, but no labeled risperidone) and to the reaction zone. The reaction zone again contains risperidone antibody (5-9) in reaction zone 8. Table 13 below shows the results, confirming that there is no dose response and the aripiprazole, olanzapine, and quetiapine conjugates that move by capillary action through the reaction zone do not bind to the risperidone antibody. <tables id="tabl0013" num="0013"><img file="EP3663317B1_D0096.tif" /></tables>

0188In order to confirm that conjugates of labeled competitive binding partners bind only to their respective antibodies deposited in the reaction zones, additional negative controls were conducted by again using samples containing no drugs. Referring to Table 14, a sample containing no aripiprazole is deposited in the sample zone and moves by capillary action through the conjugate zone (this time containing labeled aripiprazole) and to the reaction zone. The reaction zone again contains aripiprazole antibody (5C7) in reaction zone 2, as well as olanzapine antibody (4G9-1) in reaction zone 4, quetiapine antibody (11) in reaction zone 6, and risperidone antibody (5-9) in reaction zone 8. Table 14 below shows the results, confirming that there is no dose response except to the aripiprazole antibody 5C7 (in reaction zone 2). <tables id="tabl0014" num="0014"><img file="EP3663317B1_D0097.tif" /></tables>

0189Referring to Table 15, a sample containing no olanzapine is deposited in the sample zone and moves by capillary action through the conjugate zone (this time containing labeled olanzapine) and to the reaction zone. The reaction zone again contains aripiprazole antibody (5C7) in reaction zone 2, as well as olanzapine antibody (4G9-1) in reaction zone 4, quetiapine antibody (11) in reaction zone 6, and risperidone antibody (5-9) in reaction zone 8. Table 15 below shows the results, confirming that there is no dose response except to the olanzapine antibody 4G9-1 (in reaction zone 4). <tables id="tabl0015" num="0015"><img file="EP3663317B1_D0098.tif" /></tables>

0190Referring to Table 16, a sample containing no quetiapine is deposited in the sample zone and moves by capillary action through the conjugate zone (this time containing labeled quetiapine) and to the reaction zone. The reaction zone again contains aripiprazole antibody (5C7) in reaction zone 2, as well as olanzapine antibody (4G9-1) in reaction zone 4, quetiapine antibody (11) in reaction zone 6, and risperidone antibody (5-9) in reaction zone 8. Table 16 below shows the results, confirming that there is no dose response except to the quetiapine antibody 11 (in reaction zone 6). <tables id="tabl0016" num="0016"><img file="EP3663317B1_D0099.tif" /></tables>

0191Referring to Table 17, a sample containing no risperidone is deposited in the sample zone and moves by capillary action through the conjugate zone (this time containing labeled risperidone) and to the reaction zone. The reaction zone again contains aripiprazole antibody (5C7) in reaction zone 2, as well as olanzapine antibody (4G9-1) in reaction zone 4, quetiapine antibody (11) in reaction zone 6, and risperidone antibody (5-9) in reaction zone 8. Table 17 below shows the results, confirming that there is no dose response except to the risperidone antibody 5-9 (in reaction zone 8). <tables id="tabl0017" num="0017"><img file="EP3663317B1_D0100.tif" /></tables>

0192The results shown above confirm that conjugates of labeled competitive binding partners bind only to their respective antibodies in the reaction zone.

0193<figref idref="f0005 f0006 f0007">Figs. 10-13</figref> show typical dose response curves in specific antibody reaction zones, and proof of dose response low/high concentration for each specific assay in the presence of other conjugates. In <figref idref="f0005">Fig. 10</figref>, a sample containing aripiprazole is deposited in the sample zone and moves by capillary action through the conjugate zone (this time containing labeled aripiprazole, labeled olanzapine, labeled quetiapine, and labeled risperidone) and to the reaction zone. The reaction zone again contains aripiprazole antibody (5C7) in reaction zone 2. A typical dose response curve was generated as is shown in <figref idref="f0005">Fig. 10</figref> only for aripiprazole, and not for olanzapine, quetiapine, or risperidone.

0194In <figref idref="f0006">Fig. 11</figref>, a sample containing olanzapine is deposited in the sample zone and moves by capillary action through the conjugate zone (this time containing labeled aripiprazole, labeled olanzapine, labeled quetiapine, and labeled risperidone) and to the reaction zone. The reaction zone again contains olanzapine antibody (4G9-1) in reaction zone 4. A typical dose response curve was generated as is shown in <figref idref="f0006">Fig. 11</figref> only for olanzapine, and not for aripiprazole, quetiapine, or risperidone.

0195In <figref idref="f0006">Fig. 12</figref>, a sample containing quetiapine is deposited in the sample zone and moves by capillary action through the conjugate zone (this time containing labeled aripiprazole, labeled olanzapine, labeled quetiapine, and labeled risperidone) and to the reaction zone. The reaction zone again contains quetiapine antibody (11) in reaction zone 6. A typical dose response curve was generated as is shown in <figref idref="f0006">Fig. 12</figref> only for quetiapine, and not for aripiprazole, olanzapine, or risperidone.

0196In <figref idref="f0007">Fig. 13</figref>, a sample containing risperidone is deposited in the sample zone and moves by capillary action through the conjugate zone (this time containing labeled aripiprazole, labeled olanzapine, labeled quetiapine, and labeled risperidone) and to the reaction zone. The reaction zone again contains risperidone antibody (5-9) in reaction zone 8. A typical dose response curve was generated as is shown in <figref idref="f0007">Fig. 13</figref> only for risperidone, and not for aripiprazole, olanzapine, or quetiapine.

0197<figref idref="f0007 f0008 f0009">Figs. 14-17</figref> show typical dose response curves for each assay in the presence of other conjugates and antibodies. In <figref idref="f0007">Fig. 14</figref>, a sample containing aripiprazole is deposited in the sample zone and moves by capillary action through the conjugate zone (again containing labeled aripiprazole, labeled olanzapine, labeled quetiapine, and labeled risperidone) and to the reaction zone. The reaction zone again contains aripiprazole antibody (5C7) in reaction zone 2, as well as olanzapine antibody (4G9-1) in reaction zone 4, quetiapine antibody (11) in reaction zone 6, and risperidone antibody (5-9) in reaction zone 8. A typical dose response curve was generated for aripiprazole, as is shown in <figref idref="f0007">Fig. 14</figref>. When a sample containing olanzapine was deposited in the sample zone of this chip, a typical dose response curve was generated for olanzapine as shown in <figref idref="f0008">Fig. 15</figref>. When a sample containing quetiapine was deposited in the sample zone of this chip, a typical dose response curve for quetiapine was generated as shown in <figref idref="f0008">Fig. 16</figref>. When a sample containing risperidone was deposited in the sample zone of this chip, a typical dose response curve for risperidone was generated as shown in <figref idref="f0009">Fig. 17</figref>.

0198<figref idref="f0009 f0010 f0011">Figs. 18-21</figref> show comparisons of dose response curves generated as positive controls (<figref idref="f0003 f0004 f0005">Figs. 6-9</figref>) to dose response curves generated in the multiplex format (<figref idref="f0007 f0008 f0009">Figs. 14-17</figref>). The comparison for aripiprazole is shown in <figref idref="f0009">Fig. 18</figref>; for olanzapine in <figref idref="f0010">Fig. 19</figref>; for quetiapine in <figref idref="f0010">Fig. 20</figref>; and for risperidone in <figref idref="f0011">Fig. 21</figref>. These figures show that the positive control curves are similar to the multiplex curves.

0199These data show that a lateral flow assay device of the subject invention can be used to detect multiple anti-psychotic drugs using a single sample from a patient on one portable, point-of-care device.