Nucleotide sequences derived from the genomes of the retroviruses HIV-1, HIV-2 and SIV, and their application to the amplification of pol sequences in these viral genomes and to the in vitro diagnosis of infections resulting from these viruses
Abstract
Oligonucleotide characterized in that its sequence consists of: i) a specific sequence of the gag or pol gene, and capable of hybridizing at a temperature of 60 ° C to 1 ° C with the genomes of HIV-1 Bru, HIV-1 Mal, HIV-1 Eli viruses , HIV-2 Rod or VIS Mac, or ii) a complementary sequence of a sequence as defined in i.

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13 claims: 3 independent, 10 dependent
- 1ES 2 275 451 T3 REIVINDICACIONES 1. Oligonucleótido específico del gen gag elegido entre:- 5'-TGG CGC CCG AAC AGG GAC-3' - 5'-TGG CGC CTG AAC AGG GAC-3' - 5'-GGC CAG GGG GAA AGA AAA A-3' - 5'-GGC CCG GCG GAA AGA AAA A-3' - 5'-GGC CAG GAG GAA AGA AAA A-3' - 5'-CAT CAA GCA GCC ATGCAA AG-3' - 5'-CAC CAG GCA GCT ATG CAG AG-3' - 5'-AGG GCT GTT GGA AATGTGG-3' - 5'-AGG GCT GTT GGA AGTGTGG-3' - 3'-TGC CCA TAC AAA ATG TTT TA-5” - 3'-TGC CCA CACTAT ATG TTT TA-5' - 3'-TGC ATG GCT GCT TGA TG-5' - 3'-TGC ATA GCT GCC TGG TG-5' - 3'-CTT TGC ATG GCT GCT TGA TG-5' - 3'-CTC TGC ATA GCT GCC TGA TG-5' - 3'-CCA CAT TTC CAG CAT CCC T-5' - 3'-CCA CAT TTC CAG CAG CCC T-5' - 3'-CCA CAT TTC CAG CAC CCC T-5'
- 2Oligonucleótido complementario de un oligonucleótido tal como se define en la reivindicación 1.
- 3Par de cebadores oligonucleotídicos para la puesta en práctica de una amplificación génica del gen gag de virus del tipo VIH-1, VIH-2 y VIS, consistiendo cada uno de los cebadores en:i) una secuencia específica del gen gag, y susceptible de hibridar a una temperatura de 60°C± 1°C con los genomas de los virus VIH-1 Bru, VIH-1 Mal, VIH-1 Eli, VIH-2 Rod o VIS Mac, o ii) una secuencia complementaria de una secuencia tal como se define en i).
- 4Par de cebadores según la reivindicación 3, caracterizado porque la secuencia de al menos un cebador oligonucleotídico está modificada con respecto a la secuencia del gen gag de los virus VIH-1 Bru, VIH-1 Mal, VIH-1 Eli, VIH-2 Rod o VIS Mac y mantiene las propiedades de hibridación con los genomas de los virus VIH-1 Bru, VIH-1 Mal, VIH-1 Eli, VIH-2 Rod y VIS Mac.
- 5Par de cebadores según la reivindicación 3 para la puesta en práctica de una amplificación génica del gen gag de virus de tipo VIH-1, VIH-2 y SIV, consistiendo los cebadores en:i. al menos una mezcla elegida del siguiente grupo de mezclas de secuencias con sentido: Mmy1: mezcla constituida por las secuencias 5'-TGG CGC CCG AAC AGG GAC-3', 5'-TGG CGC CTG AAC AGG GAC-3' ES 2 275 451 T3 MMy2: mezcla constituida por las secuencias 5’-GGC CAG GGG GAA AGA AAA A-3’ 5’-GGC CCG GCG GAA AGA AAA A-3’, 5’-GGC CAG GAG GAA AGA AAA A-3’, MMy4bis: mezcla constituida por las secuencias 5’-CAT CAA GCA GCC AGT CAA AG-3’, 5’-CAC CAG GCA GCT ATG CAG AG-3’, MMy28: mezcla constituida por las secuencias 5’-AGG GCT GTT GGA AAT GTG G-3’, 5’-AGG GCT GTT GGA AGT GTG G-3’, y al menos una mezcla elegida del siguiente grupo de mezclas de secuencias antisentido: MMy3: mezcla constituida por las secuencias 3’-TGC CCA TAC AAA ATG TTT TA-5’, 3’-TGC CCA CAC TAT ATG TTT TA-5’, MMy4: mezcla constituida por las secuencias 3’-TGC ATG GCT GCT TGA TG-5’, 3’-TGC ATA GCT GCC TGG TG-5’, MMy4B: mezcla constituida por las secuencias: 3’-CTT TGC ATG GCT GCT TGA TG-5’, 3’-CTC TGC TGC ATA GCT GCC TGA TG-5’, MMy28bis: mezcla constituida por las secuencias 3’-CCA CAT TTC CAG CAT CCC T-5’, 3’-CCA CAT TTC CAG CAG CCC T-5’, 3’-CCA CAT TTC CAG CAC CCC T-5’.
- 6Par de cebadores según la reivindicación 5 para la puesta en práctica de una amplificación génica del gen gag de virus de tipo VIH-1, VIH-2 o VIS, consistente en:i) MMy1-MMy3:_ 5’-TGG CGC CCG AAC AGG GAC-3’ 5’-TGG CGC CTG AAC AGG GAC-3’ 3’-TGC CCA TAC AAA ATG TTT TA-5” 3’-TGC CCA CAC TAT ATG TTT TA-5’ ES 2 275 451 T3 ii) MMy1-Mmy4:_ 5’-TGG CGC CCG AAC AGG GAC-3’ 5’-TGG CGC CTG AAC AGG GAC-3’ 3’-TGC ATG GCT GCT TGA TG-5’ 3’-TGC ATA GCT GCC TGG TG-5’ iii) MMy2-MMy4:_ 5’-GGC CAG GGG GAA AGA AAA A-3’ 5’-GGC CCG GCG GAA AGA AAA A-3’ 5’-GGC CAG GAG GAA AGA AAA A-3’ 3’-TGC ATG GCT GCT TGA TG-5’ 3’-TGC ATA GCT GCC TGG TG-5’ iv) MMy4Bbis-Mmy28bis:_ 5’-CAT CAA GCA GCC ATG CAA AG-3’ 5’-CAC CAG GCA GCT ATG CAG AG-3’ 3’-CCA CAT TTC CAG CAT CCC T-5’ 3’-CCA CAT TTC CAG CAG CCC T-5’ 3’-CCA CAT TTC CAG CAC CCC T-5’
- 7Oligonucleótido o par de cebadores según una cualquiera de las reivindicaciones 1 a 6, susceptible de hibridar con los genomas de los virus VIH-1 Bru, VIH-1 Mal, VIH-1 Eli, VIH-2 Rod y VIS Mac en un tampón de composición Tris-HCl 50 mM, pH 8,9, (NH 4 ) 2 SO 4 15 mM, MgCl 2 5 mM, β-mercaptoetanol 10 mM, gelatina 0,25 mg/ml.
- 8Procedimiento de amplificación génica de secuencias nucleicas del gen gag de virus de tipo VIH-1 y/o VIH-2 y/o VIS, realizado a partir de una muestra biológica, comprendiendo este procedimiento principalmente las siguientes etapas:a) una etapa de extracción del ácido nucleico que se va a detectar perteneciente al genoma del virus de tipo VIH-1, VIH-2 o VIS, eventualmente presente en la muestra biológica anteriormente citada y, en su caso, una etapa de tratamiento con ayuda de una transcriptasa inversa de dicho ácido nucleico si este último está en forma de ARN, b) un ciclo que comprende las siguientes etapas: - desnaturalización del ácido nucleico bicatenario que se va a detectar, lo que conduce a la formación de un ácido nucleico monocatenario, - hibridación de cada una de las cadenas de ácido nucleico obtenidas en la etapa de desnaturalización precedente con al menos un cebador o un par de cebadores según una de las reivindicaciones 1 a 7, mediante la puesta en contacto de las cadenas anteriormente citadas con al menos un par de los cebadores anteriormente citados, - formación a partir de los cebadores de ADN complementarios con las cadenas con las que hibridan en presencia de una ADN polimerasa y de cuatro trifosfatos de nucleósidos (dNTP) diferentes, lo que conduce a la formación de un número mayor de ácidos nucleicos bicatenarios que no se van a detectar más que en la etapa de desnaturalización precedente, repitiéndose este ciclo un número determinado de veces para obtener dicha secuencia nucleica que se va a detectar eventualmente presente en la muestra biológica en una proporción suficiente para permitir su detección, c) una etapa de detección de la eventual presencia del ácido nucleico que pertenece al genoma del virus de tipo VIH-1, VIH-2 y/o VIS en la muestra biológica. ES 2 275 451 T3
- 9Procedimiento según la reivindicación 8, caracterizado porque la etapa de desnaturalización se realiza en presencia del (o de los) par(es) de cebadores según una de las reivindicaciones 1 a 7.
- 10Procedimiento según la reivindicación 9, caracterizado porque se realiza en las siguientes condiciones:a) hibridación: se ponen los cebadores (1 pl de una solución 40 pmolar de cada cebador) en presencia de matriz de ADN (100 a 300 ng) para la primera etapa de desnaturalización-reasociación;se calienta durante 10 minutos a 100°C, después se sumergen los tubos que contienen esta mezcla de matriz de ADN y de cebadores en agua que contiene hielo. Los cebadores se deben utilizar a una concentración final en la siguiente etapa de amplificación de 0,8 pM cada uno;b) amplificación: se añaden al medio precedente los 4 dNTP, utilizándose cada uno a 0,5 pmolar en la solución final (50 pl), y una unidad de Taq polimerasa para un medio de reacción de 50 pl.
- 11Aplicación del procedimiento según una cualquiera de las reivindicaciones 8 a 10 en el diagnóstico in vitro de infección de un individuo por un virus de tipo VIH-1 y/o VIH-2 o de un animal por al menos uno de los tres virus (VIH-1, VIH-2, VIS).
- 12Kit para la puesta en práctica de un procedimiento de amplificación génica de secuencias nucleicas del gen gag de virus del tipo VIH-1 y/o VIH-2, y/o SIV realizado a partir de una muestra biológica que comprende:i) al menos un cebador o un par de cebadores oligonucleotídicos según una cualquiera de las reivindicaciones 1 a7, ii) reactivos apropiados para la puesta en práctica del ciclo de operaciones de amplificación, especialmente ADN polimerasa, cuatro trifosfatos de nucleótidos diferentes y el tampón 10 x buffer tal como se describe en la reivindicación 10, iii) una (o más) sondas, que puede estar marcada, capaz de hibridar con la(s) secuencia(s) de ácido nucleico amplificada(s) que se van a detectar.
- 13Utilización de al menos un cebador o de un par de cebadores según una cualquiera de las reivindicaciones 1 a 7 para la amplificación génica de secuencias nucleicas del gen gag de virus de tipo VIH-1 y/o VIH-2 y/o VIS.
Independent claims13
214 paragraphs in 46 sections, as filed
ES 2 275 451 T3
DESCRIPTION
Nucleotide sequences from the genome of retroviruses of the HIV-1, HIV-2 and SIV types, and their applications especially for the amplification of the genomes of these retroviruses and for the in vitro diagnosis of infections due to these viruses.
The present invention relates to oligonucleotide sequences that can be used for the application of specific nucleic sequence amplification techniques of human immunodeficiency retrovirus of the HIV type or of the monkey immunodeficiency retrovirus of the SIV type.
The invention relates in particular to the application of these sequences to in vitro diagnostic procedures in humans of the infection of an individual by a retrovirus of the HIV type (currently HIV-1 and / or HIV-2).
The isolation and characterization of retroviruses grouped under the designation HIV-1 and HIV-2 have been described in European patent applications No. 85 / 905,513.9 (HIV-1) and No. 87 / 400,151.4 and EP 0 269 520 (HIV-2). These retroviruses have been isolated in various patients with symptoms of lymphadenopathy or a syndrome of Acquired Immune Deficiency Syndrome (AIDS).
Retroviruses of the VIG-2 type, such as retroviruses of the HIV-1 type, are characterized by a tropism for human T4 lymphocytes and by a cytopathogenic effect with respect to these lymphocytes when they multiply, to then cause generalized and persistent polyadenopathies or AIDS.
Another retrovirus, designated SIV-1, replacing this denomination the previously known denomination of STLV-III, has been isolated in the monkey rhesus macaque (MD DANIEL et al., Science, 228, 1201 (1985); NL LETWIN et al., Science, 230, 71 (1985) under the designation "STLV-IIImac").
Another virus, designated "STLV-III<sub>Agm</sub>”, Or (SIV<sub>Agm</sub>) has been isolated in wild vervet monkeys. But contrary to the viruses present in the rhesus macaque monkey, the presence of STLV-III<sub>Agm</sub> it does not appear to induce an AIDS-like disease in the African green monkey.
For the sake of verbal convenience, these viruses will be designated below only with the expression SIV (the expression SIV is the English abbreviation for "Simian Immunodeficiency Virus" (monkey immunodeficiency virus) possibly followed by an abbreviation that designates the species of monkey from which they come for example "MAC" for the macaque or "AGM" for the African green monkey (Abbreviation of "African Green Monkey").
A strain of the SIV-1mac retrovirus was deposited with the CNCM on February 7, 1986 under the number I-521.
The follow-up of the study of the HIV-1 and HIV-2 retroviruses also led to the obtaining of complementary DNA sequences (cDNA) of the RNAs of their genome. The complete nucleotide sequence of a cDNA of a representative retrovirus of the HIV-2 class (HIV-2 ROD) was deposited with the CNCM on 02/21/1986 under number I522, under the reference name LAV-2-ROD.
Likewise, the complete nucleotide sequence of a cDNA of a representative retrovirus of the HIV-1 class is described in WAIN HONSON; SONIGO, COLE, DANOS and ALIZON in CEII (January 1985).
Also for the sake of verbal convenience, viruses of the type HIV-1 and HIV 2 will sometimes be referred to in this document by the term HIV.
In vitro diagnostic procedures for HIV-1 and HIV-2 virus infections that currently exist, resort to the detection of NATI-HIV-1 OR ANTI-HIV-2 antibodies eventually present in a biological sample (biopsy). or in a biological fluid, for example in a serum obtained, from the patient under study, by putting this biological fluid in contact with extracts or antigens of HIV-1 or HIV-2, under conditions that allow the production of an eventual immunological reaction of these extracts or antigen with these antibodies.
Such diagnostic procedures run the risk of being falsely negative, particularly in the case of a recent infection of an individual with a virus of the HIV type.
Gene amplification techniques are a considerable contribution to the development of particularly sensitive in vitro diagnostic procedures for viral diseases. Among these gene amplification techniques, mention can be made of the PCT (Polymerase Chain Reaction) technique as described in European patent applications No. 86 / 302,298.4 of 03-27-1986 and number 87 / 300,203.4 of 09-01-1987, or also the technique called "Qdreplicase" described in Biotyechnology, vol 6 page 1197 (October 1988) and the one that proceeds with the help of an ARM polymerase (T7RNA polymerase) described in the international patent application number WO89 / 01050. These techniques make it possible to improve the sensitivity of detection of the nucleic acids of the viruses and require the use of specific synthesis primers.
ES 2 275 451 T3
Rayfield et al., (The Journal of Infectious Medicine, 1988, 158 (9): 1170-1176) describes a pair of oligonucleotide primers SK100 and SH104 for the application of a gene amplification of the gag gene of viruses of any HIV-1 and HIV-2, the primers each consisting of a specific sequence of the gag gene capable of hybridizing at a temperature of 60 ° C +/- 1 ° C with the genomes of the HIV-1 and HIV-2 viruses.
For the search for viruses of the HIV type, the choice of primers is problematic. Indeed, due to the great variability of the nucleotide sequences of the viral genome, a primer conforming to the known sequence of a given isolate of a virus of the HIV type may fail to amplify some viral variants of the HIV type. On the other hand, even if a primer is chosen in a conserved region of the genome from one HIV virus to another, its "good performance" is not guaranteed by this fact and may lead to poor amplification yields.
The present invention precisely provides oligonucleotide primers that allow, among others, the amplification, in particular for diagnostic purposes, of the genome of any virus of the HIV and SIV type, with yields considered as maximum in the current state of the art and avoiding above all the presence of numerous non-specific bands.
The primers of the present invention are both specific for group HIV-1 viruses and / or group HIV-2 and SIV viruses, and are sensitive to variations in the genome of these viruses.
The object of the present invention is oligonucleotide primers, of approximately 15 to 30 nucleotides, usable for the genomic amplification of viruses of the HIV-1 type and / or of the HIV-2 and SIV type.
The invention refers to any nucleotide sequence characterized in that its sequence:
- it is either chosen from those that are contained in one of the nucleotide sequences comprised in the gag gene of the HIV-1 Bru, HIV-1 Mal, HIV-1 Eli HIV-2 ROD and SIV MAC viruses, and more particularly from the which are contained in the nucleotide chainings defined below,
- either (especially for longer sequences) it contains one of the aforementioned nucleotide sequences from HIV-1 Bru, HIV-1 Mal, HIV-1 Eli HIV-2 ROD and SIV MAC, or it contains a nucleotide sequence complementary to one of these latter sequences, it being understood that any additional nucleotides that "protrude" from the nucleotide sequence of the type in question, on the side of the 3 'or 5' ends, they preferably coincide with those that are located more on the side of the corresponding 5 'or 3' ends within the complete sequence of the aforementioned HIV-1, HIV-2 or SIV MAC viruses,
- well, if this nucleotide sequence is not identical to one of the aforementioned nucleotide sequences, or is not complementary to one of these sequences, it is nevertheless capable of hybridizing with a nucleotide sequence from HIV-1 Bru viruses, HIV-1 Mal, HIV-1 Eli, and with a nucleotide sequence from the HIV-2 ROD virus and SIV MAC, mentioned above. Hybridization can be carried out at a temperature of 60 ° C +/- 1 ° C (preferably 60 ° C +/- 0.5 ° C), recommended for optimum performance.
The numbering of the nucleotides mentioned above corresponds to that used in the reference manual "Human Retrovirus and AIDS-1989" edited by the "Los Alamos National Laboratory - New Mexico USA".
(The sequences of the HIV-1 Mal viruses, HIV-1 Eli, have been described by MONTAGNIER, SONIGO, WAIN-HOBSON and ALIZON in the European patent application EP 0 253 701 dated 06-23-1986.).
The sequences of the invention were synthesized in a synthesizer commercialized by Applied Biosystems (phosphorous-amidites method, or in any other apparatus that uses a similar procedure.
The invention relates more particularly to oligonucleotide sequences characterized by the following nucleotide chain linkages (represented in the 5 '^ 3' sense; the initials "S" and "AS" indicate whether the oligonucleotide is sense or antisense, that is, whether the oligonucleotide is oriented respectively in the 5'or ^ 3 'direction or in the 3'or ^ 5' direction):
1.-) sequences common to the genomes of the HIV-1, HIV-2 and SIV viruses (the series of figures spaced by a dash indicate the position of the nucleotides in the genomes corresponding respectively to the HIV-1 Bru viruses, HIV-1 Mal, HIV-1 Eli HIV-2 ROD and SIV):
• specific sequences of the gag gene of the genome of the aforementioned viruses (gene encoding a group of antigen specific to the nucleotide of these viruses).
Some variants can be provided in some positions of the nucleotide sequences indicated above, without affecting the hybridization properties of these nucleotide sequences with the genes of the viruses of the HIV and / or SIV type. The nucleotide sequences that comprise these variants
ES 2 275 451 T3 are represented below the initial nucleotide sequences from which they are derived by substitution of one or more bases. The bases modified with respect to those of the initial nucleotide sequences are indicated with all their letters while the bases of the initial sequences that have not been substituted in the sequences comprising these variants are indicated with the aid of dotted lines.
• The synthesis of the primers is done using all the variants simultaneously. It is the mixture of all variants for a given sequence that is used in the assays.
<img file="ES2275451T3_D0001.tif" />
S, 636-653, 635-652, 636-653, 859-876, 834-851
<img file="ES2275451T3_D0002.tif" />
S, 854-872,864-888,848-872,1160-1184, 1124-1148
<img file="ES2275451T3_D0003.tif" />
AS, 900-881, 916-897, 900-881, 1212-1193,1176-1157
<img file="ES2275451T3_D0004.tif" />
AS, 1385-1369,1419-1403,1385-1369,1703-1687,1667-1651
<img file="ES2275451T3_D0005.tif" />
AS, 1388-1369, 1421-1403, 1388-1369, 1706-1687, 1670-1651,
<img file="ES2275451T3_D0006.tif" />
S, 1369-1388, 1403-1421, 1369-1388, 1687-1706, 1651-1670,
<img file="ES2275451T3_D0007.tif" />
S, 2021-2039, 2055-2073, 2024-2042, 2329-2349, 2299-2318,
ES 2 275 451 T3
MMy28bls: CCA CAT TTC CAG CAT CCC T
.............. G .... .............. C ....
AS, 2039-2021, 2073-2055, 2042-2024, 2349-2329, 2318-2299
The application also describes other sequences common to the genomes of the HIV-1, HIV-2 and SIV viruses.
• Specific sequences of the vpr gene
MMy18: GAT AGA TGG AAC AAG CCC CAG S, 5590-5610, 5585-5605, 5554-5574, 6233-6296, 6147-6170, MMy19: TCC ATT TCT TGC TCT CCT CTG T AS, 5870-5849, 5865-5844 , 5834-5813. 6551-6531, 6454-6431, • Specific sequence of the pol gene;
<img file="ES2275451T3_D0008.tif" />
S, 2620-2643, 2615-2638, 2584-2607, 2971-2994, 2887-3010
MMy29bis: TTG GGC CAT CCA TTC CTG GCT TTA
AS, 2643-2620, 2638-2615, 2607-2584, 2994-2971, 3010-2887,
MMy30: TGG ACT GTC AAT GAC ATA CAG AA
.............. T ........
S, 3339-3361, 3334-3356, 3303-3325, 3690-3712, 3606-3628,
<img file="ES2275451T3_D0009.tif" />
AS, 3361-3339, 3356-3334, 3325-3303, 3712-3690, 3628-3606,
MMy31: CAT GGG TAC CAG CAC ACA AAG G
S, 4186-4207, 4181-4202, 4150-4171, 4534-4555, 4450-4471,
MMy31bis: CCT TTG TGT GCT GGT ACC CAT G
AS, 4207-4186, 4202-4181, 4171-4150, 4555-4534, 4471-4450,
MMy32: TGG AAA GGT GAA GGG GCA GT .............. A .....
S, 4992-5011, 4987-5006, 4956-4975, 5340-5359, 5256-5275,
ES 2 275 451 T3
MM / 32bis: ACT GCC CCT TCA CCT TTC CA ........... T ........ ........... c ....... .
AS, 5011-4992, 5006-4987, 4975-4956, 5359-5340, 5275-5256 =
2.-) The application also describes sequences common to the genomes of the HIV-2 and SIV viruses (the series of figures spaced by a dash indicate the position of the nucleotides in the genomes corresponding respectively to the HIV-2 ROD and SIV-MAC).
• Specific sequences of the nef gene (encoding a negative factor of 27 kD)
MMy12: AGA GAC TCT TGC GGG CGC GTG
S, 9165-9185, 9139-9159,
MMy13: ATA TAC TTA GAA AAG GAA GAA GG
S, 9542-9564, 9516-9538,
MMy13bis: CCT TCT TCC TTT TCT AAG TAT AT
AS, 9564-9542, 9538-9516,
MMy14: AGC TGA GAC AGC AGG GAC TTT CCA
AS, 9956-9933, 9893-9870, • vif2 gene specific sequences (encoding a 23 kD infectivity factor)
MMy20: TAT GGA GGA GGA AAA GAG ATG GAT AGT
S, 5424-5450, 5340-5366,
MMy21: TAG CAC TTA TTT CCC TTG CTT T
S, 5754-5775, 5670-5691,
MMy21bis: AAA GCA AGG GAA ATA AGT GCT A
AS, 5775-5754, 5691-5670,
MMy22: CCC TTG TTC ATC ATG CCA GTA T
AS, 6082-6061, 5995-5974, • Specific sequences of the vpx gene (encoding a 12 kD protein)
MMy23: ATG TCA GAT CCC AGG GAG A
S, 5900-5918, 5813-5831,
MMy24: CCT GGA GGG GGA GGA GGA GGA
AS, 6228-6208, 6141-6121,
<td></td><td>ES 2 275 451 T3</td>
3.-) Finally, the application also describes sequences common to the genomes of the HIV-1 Bru, HIV-1 Mal, and HIV-1 Eli viruses (the series of figures spaced by a dash indicate the position of the nucleotides in the genomes corresponding respectively to the viruses HIV-1 Bru, HIV-1 MAl and HIV-1 Eli).
• Specific sequences of the env gene (which codes for envelope proteins)
<td>MMy5:</td><td>CCA ATT CCC ATA CAT TAT TGT GCC CC S, 6905-6930,6903-6928,6860-6885</td>
<td>MMy5bis:</td><td>GGG GCA CAA TAA TGT ATG GGA ATT GG AS, 6930-6905, 6928-6903, 6885-6860,</td>
<td>MMy6:</td><td>AAT GGC AGT CTA GCA GAA GAA GA S, 7055-7077,7053-7075,7010-7032</td>
<td>MMy7:</td><td>ATC CTC AGG AGG GGA CCC AGA AAT T S, 7360-7384, 7349-7373,7306-7330</td>
<td>MMy7bis:</td><td>AAT TTC TGG GTC CCC TCC TGA GGA T AS, 7384-7360,7373-7349,7330-7306</td>
<td>MMy8:</td><td>GTG CTT CCT GCT GCT CCC AAG AAC CC AS, 7857-7832,7846-7821,7800-7775</td>
<td>MMy8bis:</td><td>GGG TTC TTG GGA GCA GCA GGA AGC AC S, 7832-7857, 7821-7846, 7775-7800,</td>
<td>MMy9:</td><td>ATG GGT GGC AAG TGG TCA AAA AGT AG ...........TO.............. S, 8844-8869, 8836-8861, 8787-8812,</td>
<td>MMy9bis:</td><td>CTA CTT TTT GAC CAC TTG CCA CCC AT AS, 8869-8844, 8861-8836, 8812-8787,</td>
<td>MMy78:</td><td>TAT TAA CAA GAG ATG GTG G S, 7629-7647, 7612-7630, 7572-7590,</td>
<td>MMy89:</td><td>CCA GCA AGA AAA GAA TGA A S, 8224-8242, 8213-8231, 8167-8185,</td>
<td>MMy89bis:</td><td>TTC ATT CTT TTC TTG CTG G AS, 8242-8224, 8231-8213, 8185-8167,</td>
ES 2 275 451 T3 • Specific sequences of the nefl gene
<td>MMy10:</td><td>AAA AGA AAA GGG GGG ACT GGA S, 9116-9136, 9117-9137, 9062-9082,</td>
<td>MMy10bis:</td><td>TCC AGT CCC CCC TTT TCT TTT AS, 9136-9116, 9137-9117, 9082-9062,</td>
<td>MMy11:</td><td>AAA GTC CCC AGC GGA AAG TCC C AS, 9503-9483, 9505-9484, 9449-9428,</td>
• Specific sequences of the vifl gene
<td>MMy15:</td><td>GAT TAT GGA AAA CAG ATG GCA GGT GAT S, 5073-5099, 5068-5094, 5037-5063,</td>
<td>MMy16:</td><td>GCA GAC CAA CTA ATT CAT CTG TA S, 5383-5405, 5378-5400, 5347-5369,</td>
<td>MMy16bis:</td><td>TAC AGA TGA ATT AGT TGG TCT GC AS, 5405-5383, 5400-5378, 5369-5347,</td>
<td>MMy17:</td><td>CTT AAG CTC CTC TAA AAG CTC TA AS, 5675-5653, 5670-5648, 5639-5617,</td>
• Specific sequences of the vpu gene
<td>MMy25:</td><td>GTA AGT AGT ACA TGT AAT GCA ACC T S, 6081-6105, 6076-6100, 6045-6069,</td>
<td>MMy26:</td><td>AGC AGA AGA CAG TGG CCA TGA GAG S, 6240-6263, 6238-6261, 6207-6230,</td>
<td>MMy27:</td><td>ACT ACA GAT CAT CAA TAT CCC AA AS, 6343-6321, 6338-6316, 6307-6285,</td>
Another subject of the invention is sequences (or primers) that possess a nucleotide structure complementary to those of the primers defined above.
It also refers to nucleotide sequences that present some mutations with respect to those defined above without modifying the hybridization properties, as defined above, of these sequences. The percentage of nucleotides different from those that constitute the sequences described above, without affecting the hybridization properties of the sequences of the invention, can reach 40%.
In general, in the case of a primer (primer) with sense (S), a greater number of mutations are tolerated on the 5 'side than on the 3' side of the primer, the 3 'side having to hybridize perfectly with a given chain of a nucleic sequence to allow amplification of this sequence. in the case of an antisense primer (AS), tolerance is allowed on the 3 'side.
ES 2 275 451 T3
Another subject of the invention is primers such as those defined above and which comprise a conservation of at least 5 bases on each side, the middle part comprising modifications, without the previous hybridization properties being affected.
One of the characteristics of the oligonucleotide primers of the invention is to provide a clear amplification band, generally devoid of non-specific bands when the technical indications for use described in the present invention are applied. This fact is due to the length of the primers that can reach 27 bases, which increases the specificity of hybridization, as well as the drastic conditions of use that allow the elimination of parasitic associations. The specificity for each type of virus is a function, in addition to the percentage of homology with the reference matrix, of the length of the primers, which can reach, for an acceptable yield, up to 40 bases.
The invention also extends to primers such as those described above linked at their 5 'end to a promoter for the application of a genomic amplification method by synthesis of multiple copies of DNA or RNA as described in the application. European Patent No. 88 / 307,102.9 dated 08-01-1988.
The object of the invention is especially the use of the primers described above for the application of a procedure for gene amplification of nucleic sequences of viruses of the HIV-1 and / or HIV-2 type, and / or SIV, this procedure being able to be applied to the diagnosis in vitro of the potential infection of an individual by a virus of the type HIV-1 and / or HIV-2 or of an animal by at least one of the three viruses (HIV_1, HIV-2, CIV).
This in vitro diagnostic procedure of the invention is carried out from a biological sample (for example a biological fluid such as serum, circulating blood lymphocytes) obtained from a patient under study, and mainly comprises the following steps:
- a step of extraction of the nucleic acid to be detected belonging to the genome of the HIV-1 and / or HIV-2 or SIV type virus, possibly present in the aforementioned biological sample and, if necessary, a treatment step with the aid of a reverse transcriptase of said nucleic acid if the latter is in the form of RNA, to obtain a double-stranded nucleic acid (this last step also being referred to below as the reverse transcriptase step of the viral RNA)
- a cycle comprising the following stages:
• denaturation of the double-stranded nucleic acid to be detected, which leads to the formation of a single-stranded nucleic acid, • hybridization of each of the nucleic acid strands obtained in the preceding denaturation step with at least one primer according to the invention , by contacting the aforementioned strands with at least one pair of the primers according to the invention under the hybridization conditions defined above, • formation from DNA primers complementary to the strands to which they hybridize in the presence of a polymerization agent (DNA polymerase) and four different nucleoside triphosphates (dNTPs), which leads to the formation of a greater number of double-stranded nucleic acids to be detected that in the preceding denaturation step, repeating this cycle a certain number of times to obtain said nucleic sequence to be detected, eventually present in the biological sample in a sufficient proportion to allow its detection,
- a step of detecting the eventual presence of the nucleic acid belonging to the genome of the HIV-1 and / or HIV-2 and / or SIV type virus in the biological sample.
The hybridization step described above is advantageously carried out at 60 ° C for 1 minute and 30 seconds in the "10 X buffer" whose composition (in final use concentration) is indicated below.
The in vitro diagnostic procedure of the invention can be performed either from viral RNA, or from complementary, episomial or integrated DNA.
Indeed, the genomes of the HIV and SIV viruses are presented in the form of RNA or DNA depending on the location of the virus in the body.
When the virus is located inside the cells of the body, especially inside the blood cells, its RNA is copied back into DNA by a reverse transcriptase. In contrast, the genome of HIV-type viruses in extracellular medium, especially in blood, remains in the form of RNA.
The extraction stage according to the invention of the viral DNA contained in the cells of the biological sample recommended by the inventors - in addition to the classical procedure with phenol chloroform - has the following stages:
• suspension of the cellular residue in 0.5 ml of pyrolyzed water in a large piston potter,
ES 2 275 451 T3 • so-called "round trip" trituration of cells, • addition of Triton X100 for 1 final concentration of 0.1% • heat denaturation for 15 to 25 minutes at 100 ° C, • short centrifugation for no remove more than the cellular debris, • precipitation of the DNA overnight at -20 ° C by adding 2.5 volumes of absolute ethanol and 10% of the final volume of 3 molar sodium acetate. The DNA is then recovered and resuspended in the pyrolyzed water after being washed 2 times with ethanol at 70 ° C. It should be emphasized that this procedure allows the joint precipitation of DNA and RNA, which allows the detection of the genomic message of HIV or SIV type viruses by using the procedure called "direct DNA PCR" or by the so-called " PCR-RNA ”.
The viral AARNA extraction step is generally carried out in the conventional manner known to those skilled in the art.
After the extraction of the RNA, it is necessary to carry out an additional stage of transformation of the RNA, single-stranded into double-stranded DNA when the in vitro diagnosis of the invention is carried out from biological samples containing the viruses of the type HIV-1 and / or HIV -2 and / or SIV whose genomes are in RNA form.
This transformation of RNA into DNA is carried out by treating the RNA obtained after extraction of the biological sample, especially serum, in an appropriate medium with the aid of a reverse transcriptase.
• The invention has more particularly inter alia an in vitro diagnostic procedure as defined above, in which the retro-transcription step of the viral RNA is carried out as follows:
- 10 pg of extracted RNA resuspended in water is put in the presence of the pair of primers at a concentration of 40 pM each, in a final volume of 40 µl. The whole is denatured at 100 ° C for 10 minutes and then immersed in ice water,
- Add 10 µl of the following mixture: 5 µl of the buffer "10 buffer" described below + 1 unit of reverse transcriptase of (AMV (Avian Myeloblastosis Virus) or of MuMLV (Moloney Leukemia Virus)) + 1 unit of Taq polymerase +1 µl of the mixture of the 4 dNTPs at 25 mM each + 10 µl CSP water. The final volume is therefore 50 pl.
This reaction is carried out in two stages:
- a) first step: manufacture of the cDNA by the action of reverse transcriptase at 42 ° C for 13 minutes,
- b) second stage: classical gene amplification: it is heated at 95 ° C for 3 minutes to destroy the reverse transcriptase and allow the dehydration / hybridization stage, and then the cycle described above for gene amplification is started.
The object of the invention is more particularly an in vitro diagnostic method such as that described above, in which the denaturation step is carried out in the presence of the primer (s) or (primers) of the invention. Indeed, as specified above, one of the characteristics of the oligonucleotides (or primers) of the invention is to provide a clear amplification band, generally devoid of non-specific bands, when they are used under the following conditions:
- hybridization: the primers (1 µl of a 40 pMolar solution (40 pM) of each primer) are placed in the presence of DNA matrix (100 to 300 ng) for the first denaturation-annealing step; It is heated for 10 minutes at 100 ° C, then the tubes containing this mixture of DNA matrix and primers are immersed in ice-containing water, thereby increasing the rate of DNA matrix / primer annealing. The primers should be used at a final concentration in the next amplification step of 0.8 pM each;
- amplification: the 4 A dNTPs are added to the preceding medium, each one being used at 0.5 pMolar in final solution (50 µl), and one unit of Taq polymerase for a 50 µl reaction medium. This step is carried out in an amplification buffer of the present invention, generally designated by the name "10 X buffer" whose composition (when diluted 1/10) is the following: Tris-HCl, pH 8.9: 50 mM ; (NH<sub>4</sub>)<sub>2</sub>SW<sub>4</sub>: 15 mM; MgCl<sub>2</sub> : 5 mM; β-mercapto-ethanol: 10 mM; gelatin: 0.25 mg / ml. 5 µl of this buffer and water are added qs 50 µl to the previous medium.
ES 2 275 451 T3
The amplification cycles are carried out as follows: 30 to 40 cycles composed of:
• 94 ° C for 10 seconds (denaturation), • 60 ° C for 1 minute (hybridization), • 78 ° C for 1 minute 30 seconds (elongation)
The whole will be followed by a single cycle at 78 ° C for 15 minutes.
The precision of the temperatures indicated at +/- 0.3 ° C approximately, as well as their stability during the different cycles, represent essential conditions for obtaining the maximum yields as well as the absence of nonspecific bands.
The optimal DNA concentration is 100 to 300 ng for genomic DNA extracted from cells (from patients or in culture, from mammals or others).
It is clear that the above conditions represent optimal conditions for a final reaction medium of 50 µl, and that these conditions can be modified as a function of the final volume of the reaction medium.
By way of example of preferred primer pairs usable within the framework of the present invention, the following primer pairs may be mentioned:
- MMy1-MMy4, MMy2-MMy4, MMy1-MMy3, MMy18-MMy19, MMy4bis-MMy28bis, MMy28-MMy29bis, MMy29-MMy30bis, MMy31-MMy32bis, especially for the in vitro diagnosis of the infection of an individual HIV-1 and / or HIV-2.
The polymerization agent used in the cycle elongation step is a thermostable DNA polymerase, especially Taq polymerase, amplifiose from Appligene or any commercially available thermostable DNA polymerase.
In general, the cycle of the in vitro diagnostic procedure of the invention is repeated between 30 and 40 times.
The in vitro diagnostic method of the invention also makes it possible, depending on the nucleotide primer pairs used, to selectively detect the genes of the viruses of the HIV and / or SIV type present in the biological sample.
The primer pairs usable, by way of example, for the above-mentioned gene amplification procedure, are the following:
- MMy1-MMy4, MMy2-MMy4, MMy1-MMy3, MMy4bis-MMy28bis for the gag gene.
The application also describes the following primer pairs:
- MMy18-MMy19 for the vpr gene,
- MMy5-MMy8, MMy6-MMy8, MMy7-MMy8, MMy5-MMy7bis, MMy6-MMy7bis, MMy26-MMy5bis, MMy8bis-MMy9bis, MMy8bis-MMy89, MMy89bis-MMy9bis for the env gene,
- MMy9-MMy11, MMy9-MMy10bis, MMy10-MMy11 for the nef1 gene,
- MMy15-MMy17, MMy15-MMy16bis, MMy16-MMy17, for the vif1 gene,
- MMy20-MMy22, MMy20-MMy21bis, MMy21-MMy22 for the vif 2 gene,
- MMy23-MMy24 for vpx,
- MMy12-MMy14, MMy12-MMy13bis, MMy13-MMy14 for the nef2 gene,
- MMy25-MMy27, MMY26-MMy27 for the vpu gene,
- MMy28-MMy29bis, MMy29-MMy30bis, MMy30-MMy31bis, MMy31-MMy32bis for the pol gene.
However, the primer combinations "S" and "AS" described above are not limiting and can be varied as desired by the user.
ES 2 275 451 T3
The dimensions of the nucleotide fragments synthesized with the aid of the primer pairs mentioned above as examples are indicated in the following tables I to XI:
(The figures indicated in the following tables represent the number of nucleotides of the synthesized fragments, and the "dashes" indicate that the pairs of primers tested do not allow characterizing the corresponding viral strains).
TABLE I
<td colspan="3">gag</td><td colspan="2">gag</td>
<td></td><td>MMy1-MMy3</td><td>MMy1-MMy4</td><td>MMy2-MMy4</td><td>MMy4bis-MMy28bis</td>
<td>HIV1-BRU</td><td> 265</td><td> 750</td><td> 532</td><td> 671</td>
<td>HIV1-MAL</td><td> 282</td><td> 785</td><td> 556</td><td> 671</td>
<td>HIV1-ELI</td><td> 265</td><td> 750</td><td> 538</td><td> 674</td>
<td>HIV2-ROD</td><td> 354</td><td> 845</td><td> 544</td><td> 663</td>
<td>SIV</td><td> 343</td><td> 844</td><td> 544</td><td> 668</td>
TABLE II
<td colspan="3">env</td><td colspan="2">env</td>
<td></td><td>Mmy5-Mmy7 bis</td><td>Mmy5-Mmy8</td><td>Mmy6-Mmy7 bis</td><td>Mmy6-MMy8</td>
<td>HIV1-BRU</td><td> 480</td><td> 953</td><td> 330</td><td> 803</td>
<td>HIV1-MAL</td><td> 471</td><td> 944</td><td> 321</td><td> 794</td>
<td>HIV1-ELI</td><td> 471</td><td> 941</td><td> 321</td><td> 791</td>
<td>HIV2-ROD</td><td> -</td><td> -</td><td> -</td><td> -</td>
<td>SIV</td><td> -</td><td> -</td><td> -</td><td> -</td>
TABLE III
<img file="ES2275451T3_D0010.tif" />
ES 2 275 451 T3
TABLE IV
<img file="ES2275451T3_D0011.tif" />
TABLE V
<img file="ES2275451T3_D0012.tif" />
TABLE VI
<img file="ES2275451T3_D0013.tif" />
ES 2 275 451 T3
TABLE VII
<img file="ES2275451T3_D0014.tif" />
TABLE VII
<img file="ES2275451T3_D0015.tif" />
TABLE IX
<img file="ES2275451T3_D0016.tif" />
ES 2 275 451 T3
TABLE X
<img file="ES2275451T3_D0017.tif" />
TABLE XI pol '“ΓροΤ
<td></td><td>Mmy29-Mmy30bis</td><td>Mmy30-Mmy31bis</td><td>Mmy31-Mmy32bis</td>
<td>HIV1-BRU</td><td> 742</td><td> 869</td><td> 826</td>
<td>HIV1-MAL</td><td> 742</td><td> 869</td><td> 826</td>
<td>HIV1-ELI</td><td> 742</td><td> 869</td><td> 826</td>
<td>HIV2-ROD</td><td> 742</td><td> 869</td><td> 826</td>
<td>SIV</td><td> 742</td><td> 869</td><td> 826</td>
It should be emphasized that thanks to their arrangement in the genome, the primers used for amplification can be combined in such a way that they can be used as a probe, either after labeling with the<sup>32p</sup> by quination, either for the use in the technique of cold probes to verify the specificity of the amplification band observed during an analysis by Southern transfert ”. In addition, during a sequencing analysis of the amplified DNA, these oligonucleotides can be used as a specific primer for DNA polymerase that allows double sequencing in each direction, therefore a double reading of the sequences, thus eliminating any possible ambiguities of interpretation.
Likewise, the primers are described as described above, they are especially radioactively or enzymatically labeled, as well as their use as nucleotide probes, especially within the framework of the in vitro diagnostic procedure as described above.
Oligonucleotides are also described as described above and comprising sugars in the α-conformation. Such oligonucleotides have the characteristic of reversing the sense of the double helix formed with the matrix (virus genome chain), thus passing this double helix from the "S" state to the "AS" state.
The oligonucleotides described above are also described, some of which are methylated and / or comprise one or more sulfur atoms, especially adenines. Such oligonucleotides have the characteristic of increasing the stability of the double helix, and, consequently, of hybridizing better with the DNA strand to be amplified.
The oligonucleotides are also described as described above and are presented in the so-called "modified base" form which comprises nucleotides onto which chromophores (flat aromatic molecules such as acridine orange) are covalently grafted, especially according to the procedure described. in the article by C. Hélene appeared in "la Vie des Sciences", reports, general series, volume 4, n ° 1, p. 17-37. Such oligonucleotides have the characteristic of being easily detectable, especially by fluorescence.
The use of the oligonucleotides described in the present application for the application of an in vitro diagnostic procedure of the infection of monkeys (macaques, mangabeys monkey or green monkey) by the virus of the SIV type is also described, this procedure taking up the main characteristics of the one described above.
ES 2 275 451 T3
Another object of the invention is a kit for the application of the aforementioned gene amplification procedures. by way of example, a kit of the present invention comprises:
- at least one primer or a pair of oligonucleotide primers according to the invention, each pair comprising a primer that hybridizes to one of the strands of the nucleic acid sequence to be detected, and a primer that hybridizes to the complementary strand of this last in the conditions previously defined,
- appropriate reagents for the implementation of the cycle of amplification operations, especially DNA polymerase, four different nucleotide triphosphates and the reaction medium called "10 x buffer" described above,
- one (or more) probes, which can be labeled, especially by radioactivity or by the cold probe technique, capable of specifically hybridizing with the amplified nucleic acid sequence (s) to be detected .
The use of the primers of the invention indicated above for the implementation of a process for the synthesis of proteins encoded by the nucleotide sequences amplified with the aid of these primers is also described.
By way of illustration, this protein synthesis procedure comprises the amplification of nucleotide sequences of the genomes of the viruses of the HIV or SIV type (which encode a specific protein and which have undergone, where appropriate, some modifications of their nucleotides) by putting in contact of said sequences with at least one pair of primers according to the invention under the conditions described above, followed by the translation of these thus amplified sequences into proteins: this last step is carried out in particular by transforming appropriate host cells with the aid of vectors containing said amplified sequences, and recovering the proteins produced in these host cells.
The polypeptides derived from the translation of the nucleotide sequences (or primers) of the invention are also described.
The application also describes the use of antisense oligonucleotide primers as antiviral agents in general, especially in the fight against AIDS, as well as pharmaceutical compositions containing these antisense primers in association with a pharmaceutically acceptable carrier.
Also described are the immunogenic compositions comprising one or more translation products of the nucleotide sequences according to the invention, and / or one or more translation products of the nucleotide sequences amplified according to the procedures described above from the primers defined according to the invention. , these translation products being associated with a pharmaceutically acceptable vehicle.
Antibodies directed against one or more of the translation products described above are described (or in other words, capable of forming an immunological reaction with one or more translation products of the nucleotide sequences according to the invention, or also one or more translation products of the nucleotide sequences amplified from the primers defined according to the invention) and their use for the implementation of in vitro diagnostic procedures of the infection of an individual by a virus of the HIV-type 1 and / or HIV-2, or from an animal by at least one of the three viruses (HIV-1, HIV-2, SIV) according to procedures known to those skilled in the art.
By way of illustration, such an in vitro diagnostic procedure comprises contacting a biological sample (especially serum) from a patient under study, with described antibodies, and detection with the aid of any appropriate procedure (especially with the aid of labeled anti-immunoglobulins) of the immunological complexes formed between the antigens of the viruses of the HIV or SIV type possibly present in the biological sample and said antibodies.
In vitro diagnostic kits are described that comprise the antibodies described, and where appropriate, appropriate reagents for the identification of the immunological reaction formed between said antibodies and the antigens of the HIV or SIV viruses.
A process for the preparation of the aforementioned polypeptides is also described, especially those that correspond according to the universal genetic code to the nucleotide sequences (or primers) described above, this process being characterized in that, preferably starting from the C-terminal amino acid, they are successively condensed from two by two the successive aminocytes in the required order, or aminocylles and fragments previously formed and that already contain various aminocyl residues in the appropriate order, or also various fragments previously prepared in this way, it being understood that care will have been taken to previously protect all reactive functions carried by these aminocylles or fragment with the exception of the amine functions of one and carboxyl of the other or vice versa, which must normally intervene in the formation of peptide bonds, especially after activation of the carboxyl function, according to known procedures in peptide synthesis and so on, progressively, up to the N-terminal amino acid.
ES 2 275 451 T3
For example, the technique of peptide synthesis in homogeneous solution described by Houbenweyl in "Methode der Organischen Chemie" (Method of organic chemistry) edited by E. Wunsch, vol. 15-I and IITHIEME, STUTTGART, 1974, or to that of solid phase peptide synthesis described by RD Merrifield in "Solid Phase Peptide Synthesis" (J.AM. CHEM. SOC., 45.2149-2154).
A procedure for the preparation of the nucleotide sequences (or primers) described above is also described, this procedure comprising the following steps:
- incubation of genomic DNA, isolated from one of the previously mentioned HIV or SIV type viruses, with DNase I, and then addition of EDTA and purification by extraction to the phenol / chloroform / isoamyl alcohol mixture (25-24-1 ) and then ether.
- treatment of the DNA thus extracted by Eco R1 methylase in the presence of DTT, and purification by extraction as described above,
- incubation of the DNA thus purified with the 4 deoxynucleotide triphosphates dATP, dCTP, dGTP and dTTp in the presence of T4 DNA polymerase and DNA ligase from E. coli, and then purification according to the procedure described above,
- cloning of the nucleic acids thus obtained in an appropriate vector and the recovery of the nucleic acid sought with the aid of an appropriate probe.
A particularly advantageous process for preparing the nucleotide sequences of the invention comprises the following steps:
- DNA synthesis using the automated procedure of the //-cynanethyl phosphoramidites described in Bioorganic Chemistry 4; 274-325 (1986),
- the cloning of the nucleic acids thus obtained in an appropriate vector and the recovery of the nucleic acid by hybridization with an appropriate probe.
Another process for preparing the nucleotide sequences of the invention comprises the following steps:
- the assembly of chemically synthesized oligonucleotides, provided at their ends with different restriction sites, the sequences of which are compatible with the amino acid chaining of the natural polypeptide according to the principle described in Proc. Natl. Acad. Sci. USA, 80; 7461-7465, (1983),
- the cloning of the nucleic acids obtained in an appropriate vector and the recovery of the nucleic acid sought by hybridization with an appropriate probe.
Contents46
17 sheets
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Numbers
- Publication
- 2275451
- Publication, DOCDB
- 2275451
- Publication, EPODOC
- ES2275451T
- Application
- 5014676
- Application, DOCDB
- 05014676
- Application, EPODOC
- ES20050014676T
Titles2
- Spanish
- SECUENCIAS NUCLEOTIDICAS PROCEDENTES DEL GENOMA DE LOS RETROVIRUS DEL TIPO VIH-1,VIH-2 Y SIV, Y SUS APLICACIONES ESPECIALMENTE PARA LA AMPLIFICACION DE LOS GENOMAS DE ESTOS RETROVIRUS Y PARA EL DIAGNOSTICO IN VITRO DE LAS INFECCIONES DEBIDAS A ESTOS VIRUS.
- English
- NUCLEOTIDIC SEQUENCES FROM THE GENOMA OF RETROVIRUSES OF HIV-1, HIV-2 AND SIV TYPE, AND THEIR APPLICATIONS ESPECIALLY FOR THE AMPLIFICATION OF THE GENES OF THESE RETROVIRUSES AND FOR THE IN VITRO DIAGNOSIS OF THE INFECTIONS DUE TO THESE.
Classification
- CPC, 10
- C07K14/005
- A61K38/00
- A61K39/00
- C12N2740/15022
- C12N2740/16022
- C12Q1/703
- G01N2333/16
- Y10S435/974
- Y10S435/975
- A61P31/18
- IPC, 15
- C12Q1 70
- A61K39 00
- A61K39 21
- A61K48 00
- A61P31 18
- C07H21 04
- C07K14 00
- C07K14 155
- C07K14 16
- C07K16 00
- C07K16 10
- C12N15 09
- C12N15 49
- C12Q1 68
- G01N33 569