Abstract
Transforming growth factor β (TGF-β) is a cytokine. The TGF-β signaling pathway plays an important role in controlling cell proliferation and differentiation involved in colorectal carcinogenesis. In mammalian cells, TGFB1 is the most abundant subtype of TGF-β. The 509 C/T polymorphism in TGFB1 has been implicated in colorectal cancer risk. However, published data remain conflicting. To derive a more precise estimation of the relationship, a meta-analysis of 994 cases and 2,335 controls from five published case–control studies was performed. Overall, significantly increased colorectal cancer risks were found for CC versus TT (OR = 1.62; 95% CI: 1.30–2.02; P heterogeneity = 0.118), TC + CC versus TT (OR = 1.30; 95% CI: 1.08–1.58; P heterogeneity = 0.259) and CC versus TC + TT (OR = 1.48; 95% CI: 1.26–1.75; P heterogeneity = 0.244). In the subgroup analysis by ethnicity, significantly increased risks were also found among Asians for CC versus TT (OR = 1.77; 95% CI: 1.40–2.24; P heterogeneity = 0.519), TC + CC versus TT (OR = 1.38; 95% CI: 1.13–1.68; P heterogeneity = 0.679) and CC versus TC + TT (OR = 1.58; 95% CI: 1.31–1.89; P heterogeneity = 0.340). However, no significant associations were found among Europeans for all genetic models. This meta-analysis showed that TGFB1 509 C allele is a risk factor for developing colorectal cancer in Asians.
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Fang, F., Yu, L., Zhong, Y. et al. TGFB1 509 C/T polymorphism and colorectal cancer risk: a meta-analysis. Med Oncol 27, 1324–1328 (2010). https://doi.org/10.1007/s12032-009-9383-9
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DOI: https://doi.org/10.1007/s12032-009-9383-9