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Different roles of MTHFR C677T and A1298C polymorphisms in colorectal adenoma and colorectal cancer: a meta-analysis.

Abstract：

:Association studies on the MTHFR polymorphisms (C677T and A1298C) in colorectal cancer (CRC) and colorectal adenoma have shown conflicting results. We performed a meta-analysis to better assess the purported associations. Overall, the 677T allele (10,131 patients and 15,362 controls) showed a small but significant protective effect against CRC compared to the 677C allele [P=0.0003, odds ratio (OR)=0.93; 95% confidence interval (CI) 0.89-0.98, P=0.22 (for heterogeneity)] for a worldwide population. Meta-analyses of other genetic contrasts suggested that the 677T allele is more likely to affect CRC in a recessive genetic model worldwide (P<0.0001, OR=0.86; 95% CI 0.76-0.96, P=0.06) and in Asians (P=0.0005, OR=0.75; 95% CI 0.64-0.88, P=0.71). Similarly, we found a significantly decreased risk of CRC for 1298C polymorphism (4,764 CRC patients and 6,592 controls) for a recessive genetic model worldwide (P=0.005, OR=0.81; 95% CI 0.70-0.94, P=0.40) and in Caucasians (P=0.04, OR=0.75 95% CI 0.57-0.99, P=0.35). No evidence of association of C677T (4,616 patients and 6,338 controls) and A1298C (1,272 patients and 1,684 controls) with colorectal adenoma were found. The evidence accumulated suggests that MTHFR may represent a low-penetrance susceptible gene for CRC, and that the two polymorphisms might protect against colorectal adenoma developing into cancer. A larger single study is required to further evaluate gene-gene and gene-environment interactions for MTHFR polymorphisms and the cancer risk in a specific population.

journal_name

J Hum Genet

journal_title

Journal of human genetics

authors

Huang Y,Han S,Li Y,Mao Y,Xie Y

doi

10.1007/s10038-006-0082-5

subject

Has Abstract

pub_date

2007-01-01 00:00:00

pages

73-85

issue

1

eissn

1434-5161

issn

1435-232X

pii

10.1007/s10038-006-0082-5

journal_volume

52

pub_type

杂志文章,meta分析

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