Variant Gene Risk Allele Score vda Association Type Original DB Sentence supporting the association PMID PMID Year
dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE We conclude that the MTHFR C677T polymorphism slightly increases the risk for colorectal cancer development in our ethnic Kashmir population. 21732284

2011

dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE The 677C > T mutation in 5,10-methylenetetrahydrofolate reductase and colorectal cancer risk. 10464674

1999

dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE We found that the MTHFR C677T polymorphism was associated with colorectal cancer (P<0.04) but not with gastric cancer. 27823653

2016

dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE Total plasma homocysteine and methylenetetrahydrofolate reductase C677T polymorphism in patients with colorectal carcinoma. 17036383

2006

dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE In this report, a total of 417 HNPCC participants were genotyped for the 677 C>T and 1298 A>C SNPs to determine whether there exists an association with the age of disease onset of CRC. 19156174

2009

dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE This study suggested that MTHFR C677T and A1298C are associated with prognosis in CRC patients undergoing 5-FU-based chemotherapy. 26111049

2015

dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE Association of MTHFR C677T polymorphisms and colorectal cancer risk in Asians: evidence of 12,255 subjects. 24193867

2014

dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE We investigated the association between folate and alcohol intake, methylenetetrahydrofolate reductase (MTHFR) C677T polymorphism, and CRC risk in Koreans. 22218157

2012

dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE Methylenetetrahydrofolate reductase C677T is not associated with expression of pyrimidine metabolic enzyme genes in colorectal cancer. 16866026

2007

dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE Sub-group analysis by ethnicity revealed that MTHFR C677T polymorphism was significantly associated with reduced risk of CRC in Asians (OR = 0.80, 95%CI 0.72-0.89) and Caucasians (OR = 0.84, 95%CI 0.76-0.93) in recessive genetic model, while the MTRR 66GG genotype was found to significantly increase the risk of CRC in Caucasians (GG vs. AA: OR = 1.18, 95%CI 1.03-1.36). 22719222

2012

dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE Certain common polymorphisms within the MTHFR gene (C677T, A1298C) result in reduced enzymatic activity and have been associated with reduced risk for a variety of cancers such as acute lymphocytic leukemia, lung and colorectal cancer. 18804702

2008

dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE The MTHFR C677T and DeltaDNMT3B C-149T polymorphisms confer different risks for right- and left-sided colorectal cancer. 19326430

2009

dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE To study the relation between genetic polymorphisms of methylenetetrahydrofolate reductase (MTHFR) C677T or A1298C and the susceptibility of colorectal cancer. 18712959

2009

dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE Since it is unknown whether the MTHFR C677T and A1298C polymorphisms alter the risk for CRC, this was the aim of our study. 17111187

2007

dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE Consistent with the folate/methylation hypothesis, it was originally proposed that C677T may increase risk of CRC due to hypomethylation of oncogenes. 16933051

2006

dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE Different polymorphisms have been described for this enzyme, the most studied being the C677T, which has been shown to be associated with predisposition to colorectal cancer in patients who consume a high alcohol diet. 15033905

2004

dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE This meta-analysis suggests that the MTHFR 677C>T polymorphism increases the risk for developing colorectal cancer, while there is no association among Africans found in subgroup analysis by ethnicity. 23437053

2013

dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE We report a population-based case-control study of folate intake, related dietary factors and MTHFR polymorphisms (C677T, A1298C) and colorectal cancer in a population with relatively high colorectal cancer incidence and relatively low folate intake. 18053312

2008

dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE In summary, this meta-analysis suggests that MTHFR C677T polymorphism is associated with increased breast cancer, gastric cancer, and hepatocellular cancer risk in Asians, is associated with increased gastric cancer, multiple myeloma, and NHL risk in Caucasians, is associated with decreased AALL risk in Caucasians, is associated with decreased CALL risk in Asians, is associated with increased breast cancer risk in Asians, is associated with decreased colon cancer risk, and is associated with decreased colorectal cancer risk in male population. 26081619

2015

dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE Functional variants in the methylenetetrahydrofolate reductase (MTHFR) gene, including the 677C>T and 1298A>C polymorphisms, have been associated with a moderately reduced risk of several cancers, including colorectal cancers. 16217917

2005

dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE The aim of the study was to investigate the influence of methylenetetrahydrofolate reductase (MTHFR) gene expression levels and MTHFR polymorphism C677T on the outcome of patients with colorectal cancer (CRC). 16512993

2006

dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE Although the underlying mechanisms still remain to be clarified, epidemiological findings regarding MTHFR C677T polymorphism provide strong evidence that adequate folate status confers protection from colorectal cancer. 16128738

2005

dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE MTHFR C677T and colorectal cancer risk: A meta-analysis of 25 populations. 17131337

2007

dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE The data suggested that the 677C -->T polymorphism in MTHFR contributes significantly to the risk of CRC susceptibility in the Mexican population. 19487547

2009

dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE Females who were heterozygous or homozygous for the C677T MTHFR polymorphism were at increased risk of developing CIMP+ CRC (odds ratio 2.17, 95% confidence interval 1.03-4.57; p=0.037). 12427779

2002