Abstract: Objective To discuss the relationship between FokI gene polymorphism and colorectal cancer.Method The references that met the inclusive criteria were assessed.The extracted data were summarized in the form of tables.Data were analyzed by heterogeneity test.Meta-analysis was conducted by using fixed effects model or random effects model.Results Fifteen experimental studies were included in this study,including 7,859 colorectal cancer patients and 9,933 controls.The association between VDR gene FokI and colorectal cancer was expressed as the odds ratio(OR)and 95% confidence interval(CI).FokI recessive genetic model,ff versus FF+ Ff,ORrecessive=1.01(95% CI=0.87~1.17,I²=54%,P=0.91),ORdominant=0.94(95% CI=0.83~1.06,I²=64%,P=0.30);allele model,fversus F,OR=0.98(95% CI=0.89~1.08,I²=71%,P=0.72).In subgroup analysis,recessive genetic model,ORCaucasian race=0.95(95% CI=0.86~1.05,I²=0%,P=0.33);ORyellow race=1.12(95% CI=0.77~1.63,I²=72%,P=0.54).In subgroup analysis,dominant gene model,ORCaucasian race=0.95(95% CI=0.86~1.04,I²=27%,P=0.29);ORyellow race=0.89(95% CI=0.65~1.22,I²=78%,P=0.47).In subgroup analysis,allele model,ORCaucasian race=0.97(95% CI=0.90~1.04,I²=31%,P=0.38);ORyellow race=1(95% CI=0.79~1.27,I²=82%,P=1.00).Conclusion Our Results suggested that in VDR gene FokI,F and f alleles were not obviously directly correlated with colorectal cancer.No difference was found between Asian and Caucasian.The Conclusions in other populations should be further identified by extensive experimental studies.

Key words: Colorectal cancer, VDR, Meta-analysis