Lack of association between the PIN1 promoter -667T>C (rs2233679) polymorphism and cancer risk: Evidence from meta-analysis.

Peptidyl-prolylcis-trans isomerase NIMA-interacting 1 (PIN1) is a critical catalyst involved in multiple oncogenic signaling pathways. The PIN1 promoter -667T>C (rs2233679) polymorphism plays a role in cancer risk. The association between PIN1 (-667T>C) polymorphism and cancer risk has been previously investigated. However, the available results are inconclusive. To derive a more precise estimation, a meta-analysis of seven published case-control studies including 4,524 cases with different tumor types and 4,561 controls was performed. Published literature from PubMed and EMBASE was retrieved. Crude odds ratios (ORs) with 95% confidence intervals (CIs) were calculated to evaluate the strength of the association. Overall, the results did not suggest any associations between the PIN1 promoter (-667T>C) polymorphism and cancer susceptibility (OR=1.04, 95% CI: 0.91-1.18 for CC vs. TT; OR=0.98, 95% CI: 0.89-1.09 for TC vs. TT; OR=1.00, 95% CI: 0.91-1.10 for TC/CC vs. TT; OR=1.07, 95% CI: 0.97-1.18 for CC vs. TC/TT). Further stratified analysis by cancer type, ethnicity and sample size did not reveal any significant associations in the genetic models. The results of the present study demonstrate that the PIN1 promoter (-667T>C; rs2233679) polymorphism is not associated with cancer susceptibility.