Grant Details
Grant Number: |
1R01CA140262-01 Interpret this number |
Primary Investigator: |
Xu, Jianfeng |
Organization: |
Wake Forest University Health Sciences |
Project Title: |
Genetic Profiling in Pcpt: Prostate Cancer Risk, Psa Levels, and Chemoprevention |
Fiscal Year: |
2009 |
Abstract
DESCRIPTION (provided by applicant): More than a dozen SNPs have been found to be associated with prostate cancer (PCa) risk by genome-wide association studies (GWAS). These reported PCa risk associated SNPs, if not driven by PSA detection bias or not completely correlated with PSA, could be used to improve PSA and other existing clinical variables in predicting positive prostate biopsy (i.e. PCa). These two important questions, however, cannot be addressed by most PCa case-control studies because some cases were diagnosed on the basis of elevated PSA levels. Only studies such as the Prostate Cancer Prevention Trial (PCPT) where men at the end of the trial were biopsied regardless of PSA levels can be used to dissect these two questions. The overall hypothesis of the study is that multiple genetic variants, when combined, can be used to predict men at increased risk for PCa. Specifically, we hypothesize that 1) a subset of genetic variants are associated with PCa risk and are not solely due to PSA detection bias, 2) these genetic variants, when combined, are strongly associated with PCa risk, 3) genetic variants can supplement PSA and other existing clinical variables to improve the predictive performance for PCa and aggressive PCa, and 4) the chemoprevention effect of finasteride is different among men with different genetic risks and the reduction in PCa diagnosis by finasteride is larger for men with higher genetic risk. To test these hypotheses, we will use data and samples from the PCPT study, a phase III randomized, double-blind, placebo-controlled trial of finasteride in the prevention of prostate cancer. We have three specific aims. Aim 1 is to test whether reported prostate cancer risk associated variants from GWAS are associated with PCa risk, free of PSA detection bias. Aim 2 is to estimate the joint predictive performance for prostate cancer diagnosis, overall PCa and aggressive PCa, using genetic variants as well as PSA and other existing clinical variables. Aim 3 is to assess the differential chemoprevention effect of finasteride on prostate cancer diagnosis among men with higher or lower genetic risk for PCa. Results from this study may potentially benefit millions men. Men at highest risk for PCa could be identified at an early age for intensive screening and chemoprevention such as finasteride. Genetic variants could also be used in combination with PSA and other existing clinical variables to considerably improve their predictive accuracy for positive prostate biopsy. PUBLIC HEALTH RELEVANCE: Dozens of prostate cancer risk associated variants, when combined, could be used to identify men at highest risk for prostate cancer. Such men could be identified at an early age for intensive screening and chemoprevention. Prostate cancer risk associated variants could also be used in combination with PSA and other existing clinical variables to considerably improve their predictive accuracy for positive prostate biopsy. 1
Publications
Adding Genetic Risk Score To Family History Identifies Twice As Many High-risk Men For Prostate Cancer: Results From The Prostate Cancer Prevention Trial
Authors: Chen H.
, Liu X.
, Brendler C.B.
, Ankerst D.P.
, Leach R.J.
, Goodman P.J.
, Lucia M.S.
, Tangen C.M.
, Wang L.
, Hsu F.C.
, et al.
.
Source: The Prostate, 2016 Sep; 76(12), p. 1120-9.
PMID: 27197965
Related Citations
Impact Of Family History On Prostate Cancer Mortality In White Men Undergoing Prostate Specific Antigen Based Screening
Authors: Liss M.A.
, Chen H.
, Hemal S.
, Krane S.
, Kane C.J.
, Xu J.
, Kader A.K.
.
Source: The Journal Of Urology, 2015 Jan; 193(1), p. 75-9.
PMID: 25066872
Related Citations
Polymorphisms Influencing Prostate-specific Antigen Concentration May Bias Genome-wide Association Studies On Prostate Cancer
Authors: Dluzniewski P.J.
, Xu J.
, Ruczinski I.
, Isaacs W.B.
, Platz E.A.
.
Source: Cancer Epidemiology, Biomarkers & Prevention : A Publication Of The American Association For Cancer Research, Cosponsored By The American Society Of Preventive Oncology, 2015 Jan; 24(1), p. 88-93.
PMID: 25352524
Related Citations
Genetic Score Is An Objective And Better Measurement Of Inherited Risk Of Prostate Cancer Than Family History
Authors: Sun J.
, Na R.
, Hsu F.C.
, Zheng S.L.
, Wiklund F.
, Condreay L.D.
, Trent J.M.
, Xu J.
.
Source: European Urology, 2013 Mar; 63(3), p. 585-7.
PMID: 23245817
Related Citations
Utility Of Genome-wide Association Study Findings: Prostate Cancer As A Translational Research Paradigm
Authors: Turner A.R.
, Kader A.K.
, Xu J.
.
Source: Journal Of Internal Medicine, 2012 Apr; 271(4), p. 344-52.
PMID: 22272820
Related Citations
Association of prostate cancer risk with SNPs in regions containing androgen receptor binding sites captured by ChIP-On-chip analyses.
Authors: Lu Y.
, Sun J.
, Kader A.K.
, Kim S.T.
, Kim J.W.
, Liu W.
, Sun J.
, Lu D.
, Feng J.
, Zhu Y.
, et al.
.
Source: The Prostate, 2012 Mar; 72(4), p. 376-85.
PMID: 21671247
Related Citations
A Comparison Of Bayesian And Frequentist Approaches To Incorporating External Information For The Prediction Of Prostate Cancer Risk
Authors: Newcombe P.J.
, Reck B.H.
, Sun J.
, Platek G.T.
, Verzilli C.
, Kader A.K.
, Kim S.T.
, Hsu F.C.
, Zhang Z.
, Zheng S.L.
, et al.
.
Source: Genetic Epidemiology, 2012 Jan; 36(1), p. 71-83.
PMID: 22890972
Related Citations
Functional annotation of risk loci identified through genome-wide association studies for prostate cancer.
Authors: Lu Y.
, Zhang Z.
, Yu H.
, Zheng S.L.
, Isaacs W.B.
, Xu J.
, Sun J.
.
Source: The Prostate, 2011-06-15 00:00:00.0; 71(9), p. 955-63.
EPub date: 2011-06-15 00:00:00.0.
PMID: 21541972
Related Citations
Inherited genetic markers discovered to date are able to identify a significant number of men at considerably elevated risk for prostate cancer.
Authors: Sun J.
, Kader A.K.
, Hsu F.C.
, Kim S.T.
, Zhu Y.
, Turner A.R.
, Jin T.
, Zhang Z.
, Adolfsson J.
, Wiklund F.
, et al.
.
Source: The Prostate, 2011-03-01 00:00:00.0; 71(4), p. 421-30.
EPub date: 2011-03-01 00:00:00.0.
PMID: 20878950
Related Citations
Prostate cancer risk-associated variants reported from genome-wide association studies: meta-analysis and their contribution to genetic Variation.
Authors: Kim S.T.
, Cheng Y.
, Hsu F.C.
, Jin T.
, Kader A.K.
, Zheng S.L.
, Isaacs W.B.
, Xu J.
, Sun J.
.
Source: The Prostate, 2010-12-01 00:00:00.0; 70(16), p. 1729-38.
PMID: 20564319
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