CA2863040C

Gene expression profile algorithm and test for determining prognosis of prostate cancer

Abstract

The present invention provides algorithm-based molecular assays that involve measurement of expression levels of genes, or their co-expressed genes, from a biological sample obtained from a prostate cancer patient. The genes may be grouped into functional gene subsets for calculating a quantitative score useful to predict a likelihood of a clinical outcome for a prostate cancer patient.

CA2863040C, drawing sheet 1
Sheet 1 of 47

Term

7.8 yearsleft in the term

Expires 28 July 2034.

  1. Priority
  2. Filed
  3. Granted
  4. Today
  5. Expires

52 claims: 35 independent, 17 dependent

  1. 1
    A method of predicting a likelihood of a clinical outcome for a patient with prostate cancer, comprising:(a) measuring levels of RNA transcripts of each of genes FAM13C, KLK2, AZGP1, and SRD5A2 in a biological sample containing cancer cells obtained from the patient;(b) normalizing the levels of the RNA transcripts to obtain normalized RNA expression levels;(c) calculating an androgen group score for the patient from the normalized RNA expression levels, wherein the androgen group score is calculated from the sum of the normalized RNA expression levels of each of genes FAM13C, KLK2, AZGP1, and SRD5A2;and (d) predicting the likelihood of a clinical outcome for the patient based on the androgen group score, wherein decreased normalized RNA expression of each of FAM13C, KLK2, AZGP1, and SRD5A2 correlates with an increased likelihood of a negative clinical outcome, wherein the clinical outcome is upgrading of prostate cancer, upstaging of prostate cancer, recurrence of prostate cancer, non-organ-confined disease, or adverse pathology.
  2. 5
    The method of any one of claims 1-4, wherein the levels of the RNA transcripts of FAM13C, KLK2, AZGP1, and SRD5A2 are normalized relative to the levels of the RNA transcripts of ARF1, ATP5E, CLTC, GPS1, and PGK1.
  3. 6
    The method of any one of claims 1-5, wherein the clinical outcome is upgrading of prostate cancer.
  4. 7
    The method of any one of claims 1-5, wherein the clinical outcome is upstaging of prostate cancer.
  5. 8
    The method of any one of claims 1-5, wherein the clinical outcome is recurrence of prostate cancer.
  6. 9
    The method of any one of claims 1-5, wherein the clinical outcome is non-organconfined disease.
  7. 10
    The method of any one of claims 1-5, wherein the clinical outcome is adverse pathology.
  8. 11
    The method of any one of claims 1-10, wherein the levels of the RNA transcripts are measured by a method comprising quantitative polymerase chain reaction.
  9. 12
    The method of any one of claims 1-11, further comprising creating a report summarizing the likelihood of a clinical outcome. 105 Date Reçue/Date Received 2021-02-01
  10. 13
    The method of any one of claims 1-12, wherein the biological sample containing cancer cells is fixed, paraffin-embedded, or fresh, or frozen.
  11. 14
    The method of any one of claims 1-12, wherein part (d) comprises predicting the likelihood of a clinical outcome for the patient based on the androgen group score of the sample as compared to androgen group scores for reference prostate cancer samples.
  12. 15
    A method of predicting a likelihood of a clinical outcome for a patient with prostate cancer, comprising:(a) measuring levels of RNA transcripts of genes FAM13C, KLK2, AZGP1, and SRD5A2;at least one of genes BGN, COL 1 Al, and SFRP4;and at least one of genes FLNC, GSN, GSTM2, and TPM2 in a biological sample comprising cancer cells obtained from die patient;(b) normalizing the levels of the RNA transcripts to obtain normalized RNA expression levels;(c) calculating a stromal response group, a cellular organization group, and an androgen group score for the patient from the normalized RNA expression levels, wherein the genes are grouped into stromal response, cellular organization, and androgen groups as follows: a) stromal response group: BGN, COL1A1, and SFRP4, b) cellular organization group: FLNC, GSN, GSTM2, and TPM2, and c) androgen group: FAM13C, KLK2, AZGP1, and SRD5A2;and (d) predicting the likelihood of a clinical outcome for the patient based on the stromal response group, cellular organization group, and androgen group scores, wherein increased normalized RNA expression levels of BGN, COL 1 Al, and SFRP4 correlate with an increased likelihood of a negative clinical outcome, and wherein decreased normalized RNA expression levels of FLNC, GSN, GSTM2, TPM2, FAM13C, KLK2, AZGP1, and SRD5A2 correlate with an increased likelihood of a negative clinical outcome, wherein the clinical outcome is upgrading of prostate cancer, upstaging of prostate cancer, recurrence of prostate cancer, nonorgan-confined disease, or adverse pathology. 106 Date Reçue/Date Received 2021-02-01
  13. 19
    The method of any one of claims 15-18, comprising measuring levels of RNA transcripts of each of BGN, COL1 Al, and SFRP4, wherein the stromal response group score equals 0.527 x BGN + 0.457 x COL1A1 + 0.156 x SFRP4, wherein the gene symbols in the equation represent the normalized RNA expression levels of the respective genes.
  14. 20
    The method of any one of claims 15-19, comprising measuring levels of RNA transcripts of each of FLNC, GSN, TPM2, and GSTM2, wherein the cellular organization group score equals 0.163 x FLNC + 0.504 x GSN + 0.421 x TPM2 + 0.394 x GSTM2, wherein the gene symbols in the equation represent the normalized RNA expression levels of the respective genes.
  15. 21
    The method of any one of claims 15-20, further comprising determining a normalized TPX2 RNA expression level, wherein the normalized TPX2 RNA expression level is used to 107 Date Reçue/Date Received 2021-02-01 calculate a proliferation group score, and wherein an increased normalized TPX2 RNA expression level correlates with an increased likelihood of a negative clinical outcome.
  16. 23
    The method of any one of claims 15-22, wherein the levels of the RNA transcripts are normalized relative to the levels of the RNA transcripts of ARF1, ATP5E, CLTC, GPS1, and PGK1.
  17. 24
    The method of any one of claims 15-23, wherein the clinical outcome is upgrading of prostate cancer.
  18. 25
    The method of any one of claims 15-23, wherein the clinical outcome is upstaging of prostate cancer.
  19. 26
    The method of any one of claims 15-23, wherein the clinical outcome is recurrence of prostate cancer.
  20. 27
    The method of any one of claims 15-23, wherein the clinical outcome is non-organconfined disease.
  21. 28
    The method of any one of claims 15-23, wherein the clinical outcome is adverse pathology.
  22. 29
    The method of any one of claims 15-28, wherein the levels of the RNA transcripts are measured by a method comprising quantitative polymerase chain reaction. 108 Date Reçue/Date Received 2021-02-01
  23. 30
    The method of any one of claims 15-29, further comprising wearing a report summarizing the likelihood of a clinical outcome.
  24. 31
    The method of any one of claims 15-30, wherein the biological sample containing cancer cells is fixed, paraffin-embedded, or fresh, or frozen.
  25. 32
    The method of any one of claims 21-31, wherein part (d) comprises predicting the likelihood of a clinical outcome for the patient based on the stromal response, cellular organization, androgen group, and proliferation group scores of the sample as compared to stromal response, cellular organization, androgen group, and proliferation group scores for reference prostate cancer samples.
  26. 33
    A method of predicting a likelihood of a clinical outcome for a patient with prostate cancer, comprising:(a) determining levels of RNA transcripts of each of the following genes: BGN, COL1A1, SFRP4, FLNC, GSN, TPM2, GSTM2, FAM13C, KLK2, AZGP1, SRD5A2, and TPX2 in a biological sample containing cancer cells obtained from the patient;(b) normalizing the levels of the RNA transcripts to obtain normalized RNA expression levels;(c) calculating a quantitative score (QS) for the patient, wherein the QS is calculated as follows: QS = 0.735 x stromal response group score -0.368 x cellular organization group score -0.352 x androgen group score + 0,095 x proliferation group score, wherein the stromal response group score = 0.527 x BGN + 0.457 x COL1A1 + 0.156 x SFRP4, the cellular organization group score = 0.163 x FLNC + 0.504 x GSN + 0.421 x TPM2 + 0.394 x GSTM2, the androgen group score = 0.634 x FAM13C + 1.079 x KLK2 + 0.642 x AZGP1 + 0.997 x SRD5A2 Threshold score, 109 Date Reçue/Date Received 2021-02-01 the proliferation score = TPX2 Threshold score, wherein the SRD5A2 Threshold Score = {5.5 if SRD5A2 5.5 and SFD5A2 otherwise}, and the TPX Threshold score = {5.0 if TPX2 5.0 and TPX2 otherwise}, wherein the gene symbols in the equations represent the normalized RNA expression levels of the respective genes;and (d) predicting a likelihood of a clinical outcome for the patient based on the quantitative score, wherein the clinical outcome is upgrading of prostate cancer, upstaging of prostate cancer, recurrence of prostate cancer, non-organ-confmed disease, or adverse pathology.
  27. 39
    The method of any one of claims 33-38, wherein the levels of the RNA transcripts are measured by a method comprising quantitative polymerase chain reaction.
  28. 40
    The method of any one of claims 33-39, further comprising creating a report summarizing the likelihood of a clinical outcome.
  29. 41
    The method of any one of claims 33-40, wherein the biological sample containing cancer cells is fixed, paraffin-embedded, or fresh, or frozen. 110 Date Reçue/Date Received 2021-02-01
  30. 42
    The method of any one of claims 33-41, wherein part (d) comprises predicting the likelihood of a clinical outcome for the patient based on the quantitative score of the sample as compared to quantitative scores for reference prostate cancer samples.
  31. 43
    A method of predicting a likelihood of a clinical outcome for a patient with prostate cancer, comprising:(a) measuring in a biological sample containing cancer cells obtained from the patient levels of RNA transcripts of each of a set of genes of from any one of algorithms RS 17, RS 19, RS20, RS21, RS22, RS23, RS24, RS25, or RS26, shown in Table 4;(b) normalizing the levels of the RNA transcripts to obtain normalized RNA expression levels;(c) calculating a quantitative score for the patient using the normalized RNA expression levels according to any one of algorithms RS 17, RS 19, RS20, RS21, RS22, RS23, RS24, RS25, or RS26, shown in Table 4;and (d) predicting the likelihood of a clinical outcome for the patient based on the quantitative score, wherein the clinical outcome is upgrading of prostate cancer, upstaging of prostate cancer, recurrence of prostate cancer, non-organ-confined disease, or adverse pathology.
  32. 49
    The method of any one of claims 43-48, wherein the levels of the RNA transcripts are measured by a method comprising quantitative polymerase chain reaction.
  33. 50
    The method of any one of claims 43-49, further comprising creating a report summarizing the likelihood of a clinical outcome.
  34. 51
    The method of any one of claims 43-50, wherein the biological sample containing cancer cells is fixed, paraffin-embedded, or fresh, or frozen.
  35. 52
    The method of any one of claims 43-51, wherein part (d) comprises predicting the likelihood of a clinical outcome for the patient based on the quantitative score of the sample as compared to quantitative scores for reference prostate cancer samples.
Independent claims35