title: Association of a common genetic variant in prostate stem cell antigen with cancer risk.
abstract: BACKGROUND
  Polymorphisms in the prostate stem cell antigen (PSCA) gene have been hypothesized to increase the genetic susceptibility to cancers. The common sequence variation in PSCA rs2294008 (C>T) has been implicated in cancer risk. However, results of the relevant published studies were somewhat underpowered and controversial in general.
  
  
  METHODS
  To evaluate the role of PSCA rs2294008 (C>T) genotype in global cancer, we performed a pooled analysis of all the available published studies involving 22,817 cancer patients and 27,753 control subjects.
  
  
  RESULTS
  The results showed evidence that PSCA rs2294008 (C>T) was associated with increased total cancer risk in the overall comparisons. Stratified analysis by cancer type indicated that PSCA rs2294008 T is associated with increased risk of gastric cancer (OR = 1.24, 95% CI = 1.09-1.42, p heterogeneity < 0.001, I (2) = 88.0%) and bladder cancer (OR = 1.07, 95% CI = 1.04-1.11, p heterogeneity = 0.108, I (2) = 55.0%) by allelic contrast. Furthermore, in stratified analysis by histological types of gastric cancer, this PSCA variant showed significant associations with diffuse type (OR = 1.81, 95% CI = 1.16-2.81, p heterogeneity < 0.001, I (2) = 88.9%) but not intestinal type (OR = 1.29, 95% CI = 0.95-1.74, p heterogeneity < 0.001, I (2) = 85.2%) in a dominant genetic model. Similar results were found in Asian and European descendents and population-based studies.
  
  
  CONCLUSIONS
  In all, our meta-analysis suggests that PSCA rs2294008 (C>T) may play allele-specific roles in cancer development. Further prospective studies with larger numbers of participants worldwide should be performed in different kinds of cancer and other descendents in more detail.
authors.affiliation: Department of Urology, The First Affiliated Hospital of Soochow University, Suzhou, China ; Department of Urology, Changzhou No. 2 People's Hospital Affiliated to Nanjing Medical University, Changzhou, China.
authors.forename: Li
authors.initials: L
authors.lastname: Zuo
authors.affiliation: Department of Urology, Changzhou No. 2 People's Hospital Affiliated to Nanjing Medical University, Changzhou, China.
authors.forename: Li Feng
authors.initials: LF
authors.lastname: Zhang
authors.affiliation: Department of Urology, Changzhou No. 2 People's Hospital Affiliated to Nanjing Medical University, Changzhou, China.
authors.forename: Xiao Peng
authors.initials: XP
authors.lastname: Wu
authors.affiliation: Department of Urology, Changzhou No. 2 People's Hospital Affiliated to Nanjing Medical University, Changzhou, China.
authors.forename: Zhong Xing
authors.initials: ZX
authors.lastname: Zhou
authors.affiliation: Department of Urology, Changzhou No. 2 People's Hospital Affiliated to Nanjing Medical University, Changzhou, China.
authors.forename: Jian Gang
authors.initials: JG
authors.lastname: Zou
authors.affiliation: Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.
authors.forename: Jun
authors.initials: J
authors.lastname: He
authors.affiliation: Department of Urology, The First Affiliated Hospital of Soochow University, Suzhou, China.
authors.forename: Jian Quan
authors.initials: JQ
authors.lastname: Hou
keywords: cancer risk; meta-analysis; polymorphism; prostate stem cell antigen
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