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Pooled analysis of phosphatidylinositol 3-kinase pathway variants and risk of prostate cancer.

Abstract：

:The phosphatidylinositol 3-kinase (PI3K) pathway regulates various cellular processes, including cellular proliferation and intracellular trafficking, and may affect prostate carcinogenesis. Thus, we explored the association between single-nucleotide polymorphisms (SNP) in PI3K genes and prostate cancer. Pooled data from the National Cancer Institute Breast and Prostate Cancer Cohort Consortium were examined for associations between 89 SNPs in PI3K genes (PIK3C2B, PIK3AP1, PIK3C2A, PIK3CD, and PIK3R3) and prostate cancer risk in 8,309 cases and 9,286 controls. Odds ratios (OR) and 95% confidence intervals (95% CI) were estimated using logistic regression. SNP rs7556371 in PIK3C2B was significantly associated with prostate cancer risk [OR(per allele), 1.08 (95% CI, 1.03-1.14); P(trend) = 0.0017] after adjustment for multiple testing (P(adj) = 0.024). Simultaneous adjustment of rs7556371 for nearby SNPs strengthened the association [OR(per allele), 1.21 (95% CI, 1.09-1.34); P(trend) = 0.0003]. The adjusted association was stronger for men who were diagnosed before the age of 65 years [OR(per allele), 1.47 (95% CI, 1.20-1.79); P(trend) = 0.0001] or had a family history [OR(per allele) = 1.57 (95% CI, 1.11-2.23); P(trend) = 0.0114], and was strongest in those with both characteristics [OR(per allele) = 2.31 (95% CI, 1.07-5.07), P-interaction = 0.005]. Increased risks were observed among men in the top tertile of circulating insulin-like growth factor-I (IGF-I) levels [OR(per allele) = 1.46 (95% CI, 1.04-2.06); P(trend) = 0.075]. No differences were observed with disease aggressiveness (Gleason grade >or=8 or stage T(3)/T(4) or fatal). In conclusion, we observed a significant association between PIK3C2B and prostate cancer risk, especially for familial, early-onset disease, which may be attributable to IGF-dependent PI3K signaling.

journal_name

Cancer Res

journal_title

Cancer research

authors

Koutros S,Schumacher FR,Hayes RB,Ma J,Huang WY,Albanes D,Canzian F,Chanock SJ,Crawford ED,Diver WR,Feigelson HS,Giovanucci E,Haiman CA,Henderson BE,Hunter DJ,Kaaks R,Kolonel LN,Kraft P,Le Marchand L,Riboli E,Siddi

doi

10.1158/0008-5472.CAN-09-3575

subject

Has Abstract

pub_date

2010-03-15 00:00:00

pages

2389-96

issue

6

eissn

0008-5472

issn

1538-7445

pii

0008-5472.CAN-09-3575

journal_volume

70

pub_type

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