Liang Shi1, Chongyang Zhang2, Dongqiang Zhao3, Kexia Liu1, Tiejun Li1, Hui Tian3. 1. The First Department of General Surgery, Cangzhou Central Hospital of Hebei Province Xinhua West Road No. 16, Xinhua District, Cangzhou 061001, Hebei Province, China. 2. Cangzhou Hospital of Integrated Traditional Chinese Medicine and Western Medicine in Hebei Hebei Province, China. 3. The Second Hospital of Hebei Medical University Hebei Province, China.
Abstract
OBJECTIVE: This study aimed to gain a better insight into the impact of the mir-196a-2 C>T polymorphism on the susceptibility to colorectal cancer (CRC). METHODS: In a meta-analysis of 6 publications with a total of 1,754 cancer cases and 2,430 controls, we summarized the data on the associations between the studied mir-196a-2 C>T polymorphism and CRC risk and conducted subgroup analyses by ethnicity and control sources. RESULTS: We found no overall association between the mir-196a-2 C>T polymorphism and CRC risk. But a significant association was found in the stratified analysis according to ethnicity among Asians (ORCC vs. TT = 1.22, 95% CI = 1.02-1.45, P heterogeneity = 0.718; ORCC vs. TC + TT = 1.22, 95% CI = 1.04-1.44, P heterogeneity = 0.590; ORallele C vs. allele T = 1.10, 95% CI = 1.01-1.20, P heterogeneity = 0.726) rather than Caucasians. CONCLUSIONS: Our results suggested that there was no overall risk of CRC in relation to the mir-196a-2 C>T polymorphism. However, this polymorphism was associated with an increased risk in Asian populations.
OBJECTIVE: This study aimed to gain a better insight into the impact of the mir-196a-2 C>T polymorphism on the susceptibility to colorectal cancer (CRC). METHODS: In a meta-analysis of 6 publications with a total of 1,754 cancer cases and 2,430 controls, we summarized the data on the associations between the studied mir-196a-2 C>T polymorphism and CRC risk and conducted subgroup analyses by ethnicity and control sources. RESULTS: We found no overall association between the mir-196a-2 C>T polymorphism and CRC risk. But a significant association was found in the stratified analysis according to ethnicity among Asians (ORCC vs. TT = 1.22, 95% CI = 1.02-1.45, P heterogeneity = 0.718; ORCC vs. TC + TT = 1.22, 95% CI = 1.04-1.44, P heterogeneity = 0.590; ORallele C vs. allele T = 1.10, 95% CI = 1.01-1.20, P heterogeneity = 0.726) rather than Caucasians. CONCLUSIONS: Our results suggested that there was no overall risk of CRC in relation to the mir-196a-2 C>T polymorphism. However, this polymorphism was associated with an increased risk in Asian populations.