The CYP1B1 Leu432Val polymorphism and risk of urinary system cancers.
The cytochrome P450 1B1 (CYP1B1) gene plays a key role in the metabolism of various carcinogens. The CYP1B1 Leu432Val polymorphism leads to leucine to valine substitution at codon 432. A lot of studies have shown that the CYP1B1 Leu432Val polymorphism was associated with urinary system cancers, especially prostate cancer. However, the results were still inconclusive. In this meta-analysis, by searching online databases and references of related reviews, we identified 17 eligible studies to assess the relationship between CYP1B1 Leu432Val polymorphism and urinary system cancers, including 7,783 cancer cases and 7,238 controls. By pooling all eligible studies, we found that the CYP1B1 Leu432Val polymorphism was not associated with overall urinary system cancers. However, in subgroup analyses, we found that the variant 432Val allele significantly increased the risk of prostate cancer (Val vs. Leu, odds ratio (OR) = 1.064, 95% confidence interval (CI) 0.981-1.154; Pheterogeneity = 0.002), while no association was found for bladder cancer (Val vs. Leu, OR = 0.942, 95% CI 0.853-1.041; Pheterogeneity = 0.504). No evidence of publication bias was found (Begg's test, P = 0.053; Egger's test, P = 0.073). In conclusion, based on 17 eligible studies, we found that the CYP1B1 Leu432Val polymorphism was associated with an increased risk of prostate cancer, while no association of bladder cancer was observed.
Department of Urology, General Hospital of Jinan Military Command, 25 Shifan Road, Jinan, 250031, China.
Yi
Y
Liu
Chang-sheng
CS
Lin
Ai-min
AM
Zhang
Hua
H
Song
Chang-chun
CC
Fan
D001189:Aryl Hydrocarbon Hydroxylases / Q000235:genetics*; D065633:Cytochrome P-450 CYP1B1; D020022:Genetic Predisposition to Disease; D006801:Humans; D008297:Male; D011110:Polymorphism, Genetic; D011471:Prostatic Neoplasms / Q000235:genetics*; D012306:Risk; D001749:Urinary Bladder Neoplasms / Q000235:genetics*
D001189:Aryl Hydrocarbon Hydroxylases; C585496:CYP1B1 protein, human; D065633:Cytochrome P-450 CYP1B1