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rs1217691063
|
|
|
0.100 |
GeneticVariation |
BEFREE |
677 C>T substitution does not affect breast cancer risk in the Indo-European and Dravidian populations of India.
|
25803740 |
2015 |
|
rs1217691063
|
|
|
0.100 |
GeneticVariation |
BEFREE |
A reduced activity of methylenetetrahydrofolate reductase (MTHFR) due to frequent C677T polymorphism affects DNA synthesis, repair and methylation and may be implicated in breast cancer risk.
|
17260091 |
2007 |
|
rs1217691063
|
|
|
0.100 |
GeneticVariation |
BEFREE |
After adjusting for age of menarche, parity, alcohol intake and total fat intake we observed reductions in odds ratios for breast cancer risk comparing the highest with the lowest quartiles of serum folate concentrations of 0.23 (95% confidence interval (CI) 0.09, 0.54) for the entire group, 0.27 (CI 0.09, 0.80) for the wild-type and 0.08 (CI 0.01, 0.52) for the heterozygous C677T genotype.
|
15110890 |
2004 |
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rs1217691063
|
|
|
0.100 |
GeneticVariation |
BEFREE |
Although the authors first determined whether genotypes of drug-metabolizing enzymes and transporters--glutathione S-transferase (GST) genes, GSTM1 positive/null, GSTT1 positive/null and GSTP1 A313G, methylenetetrahydrofolate reductase (MTHFR) C677T, reduced folate carrier 1 (RFC1) G80A, and breast cancer resistant protein (BCRP) C421A--were associated with hepatotoxicity for 24 patients, no significant difference was detected for genotype and allelic frequencies between the patients with and those without severe treatment-related hepatotoxicity.
|
20670164 |
2010 |
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rs1217691063
|
|
|
0.100 |
GeneticVariation |
BEFREE |
Associations between the combined MTHFR C677T-A1298C polymorphism and breast cancer are possible from this study.
|
22901194 |
2012 |
|
rs1217691063
|
|
|
0.100 |
GeneticVariation |
BEFREE |
Based on the hypothesis that variants of the cSHMT C1420T together with methionine synthase (MS A2756G) and 5,10-methylenetetrahydrofolate reductase (MTHFR C677T and A1298C) are associated with breast cancer, we performed a multigenic case-control study of the effects to breast cancer risk of four polymorphisms of folate-metabolizing genes against duration of estrogen exposure.
|
17896178 |
2008 |
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rs1217691063
|
|
|
0.100 |
GeneticVariation |
BEFREE |
Crude ORs with 95% CIs were used to assess the strength of association between the MTHFR C677T polymorphism and breast cancer risk.
|
20143151 |
2010 |
|
rs1217691063
|
|
|
0.100 |
GeneticVariation |
BEFREE |
Effect of the methylenetetrahydrofolate reductase C677T polymorphism on chemosensitivity of colon and breast cancer cells to 5-fluorouracil and methotrexate.
|
14734703 |
2004 |
|
rs1217691063
|
|
|
0.100 |
GeneticVariation |
BEFREE |
Encouraged by recent studies on the MTHFR 677C>T polymorphism and breast cancer risk that suggested an association of the 677 TT genotype with increased breast cancer susceptibility in premenopausal women, we performed an analysis of the relationship between breast cancer risk and the MTHFR 677C>T polymorphism in 210 premenopausal breast cancer patients and sex- and agematched healthy control subjects.
|
17453338 |
2008 |
|
rs1217691063
|
|
|
0.100 |
GeneticVariation |
BEFREE |
Folate intake, vitamin B12 intake and variants of MTHFR C677T and MTHFR A1298C demonstrated no association with risk of breast cancer.
|
24175799 |
2013 |
|
rs1217691063
|
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|
0.100 |
GeneticVariation |
BEFREE |
Furthermore, it has been shown in patients with breast cancer a risk of presenting with an aggressive biophenotype about twice or three times higher in the presence of the C677T and A1298C polymorphisms, respectively.
|
31523170 |
2019 |
|
rs1217691063
|
|
|
0.100 |
GeneticVariation |
BEFREE |
Genetic polymorphism of MTHFR C677T may modulate the risk of breast cancer especially in the 41-60 year age group.
|
26163632 |
2015 |
|
rs1217691063
|
|
|
0.100 |
GeneticVariation |
BEFREE |
Genetic polymorphisms of glutathione S-transferase (GST) genes including GSTT1 positive/null, GSTM1 positive/null, and GSTP1 A313G, and genes for reduced folate carrier 1 G80A (RFC1 G80A), methylenetetrahydrofolate reductase C677T (MTHFR C677T), and breast cancer resistant protein C421A (BCRP C421A) were determined for 26 patients by the polymerase chain reaction (PCR) method or by direct sequencing.
|
17180579 |
2007 |
|
rs1217691063
|
|
|
0.100 |
GeneticVariation |
BEFREE |
Homozygosity for the low-activity C677T genotype (TT) may represent a genetic determinant increasing breast cancer risk.
|
16097444 |
2005 |
|
rs1217691063
|
|
|
0.100 |
GeneticVariation |
BEFREE |
However, a meta-analysis of the 6 association studies carried out in Turkish populations with 707 patients and 880 controls showed a significant association between breast cancer and the MTHFR gene C677T polymorphism.
|
27614738 |
2016 |
|
rs1217691063
|
|
|
0.100 |
GeneticVariation |
BEFREE |
However, among postmenopausal women, there was an increase in breast cancer risk for women who were homozygote TT for MTHFR C677T and had high lifetime alcohol intake (>or=1,161.84 oz; OR, 1.92; 95% CI, 1.13-3.28) and for those who had a high number of drinks per drinking day (>1.91 drinks/day; OR, 1.80; 95% CI, 1.03-3.28) compared with nondrinkers who were homozygote CC.
|
19706843 |
2009 |
|
rs1217691063
|
|
|
0.100 |
GeneticVariation |
BEFREE |
In a nested case-control study of 380 women with incident breast cancer and 662 controls within the Singapore Chinese Health Study, we found no association between either green tea intake or gene polymorphisms of MTHFR (C677T and A1298C) and TYMS (1494 ins/del) and breast cancer risk.
|
18669903 |
2008 |
|
rs1217691063
|
|
|
0.100 |
GeneticVariation |
BEFREE |
In addition, females carrying MTHFR C</span>677T CT or TT genotypes had a higher odds ratio of 1.21 (95% confidence interval=1.03-1.42, p=1.85E-5) for breast cancer, especially before the age of 45.4 years (odds ratio=1.51 and 95% confidence interval=1.20-1.90).
|
25075036 |
2014 |
|
rs1217691063
|
|
|
0.100 |
GeneticVariation |
BEFREE |
In addition, individuals with the TT genotype of MTHFR 677C/T were associated with increased risk of breast cancer by logistic regression analysis; the adjusted odds ratio (95%CI) was 3.05 (1.17-8.87).
|
26662439 |
2015 |
|
rs1217691063
|
|
|
0.100 |
GeneticVariation |
BEFREE |
In conclusion, our study demonstrated that MTHFR C677T polymorphism and folate are associated with risk of breast cancer.
|
25078601 |
2014 |
|
rs1217691063
|
|
|
0.100 |
GeneticVariation |
BEFREE |
In contrast, there was no statistically significant association between the risk of breast cancer and the MTHFR C677T genotype.
|
15736423 |
2005 |
|
rs1217691063
|
|
|
0.100 |
GeneticVariation |
BEFREE |
In summary, during this meta-analysis, we found that MTHFR C677T polymorphism was significantly associated with breast cancer risk in the Chinese population.
|
24078451 |
2014 |
|
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 |
|
rs1217691063
|
|
|
0.100 |
GeneticVariation |
BEFREE |
In this case-control study, we investigated the association between MTHFR C677T and A1298C, TYMS 5'-UTR, MTR A2756G and cSHMT C1420T and also the folate carrier (RFC1 G80A) and breast cancer risk in a northeastern Brazilian population.
|
22134752 |
2012 |
|
rs1217691063
|
|
|
0.100 |
GeneticVariation |
BEFREE |
Increased breast cancer risk has been observed with both low folate status and a functional polymorphism in methylenetetrahydrofolate reductase (MTHFR 677C --> T).
|
19707223 |
2010 |