Abstract
This systematic review and meta-analysis were conducted to investigate the association between methylenetetrahydrofolate reductase (MTHFR) C677T and A1298C polymorphisms with breast cancer (BC) in Asians. Systematic searches were conducted in PubMed, EMBASE, Web of Science, and Scopus by May 2020. Inter-study heterogeneity was also assessed with a Q test, along with I2 statistics. Random-effects models were applied to pooled crude ORs with corresponding 95% CIs for the genetic models. A total of 1097 identified results, along with 36 qualified studies were included: for MTHFR C677T polymorphism, a total of 36 studies was comprised of 11,261 cases and 13,318 controls and for MTHFR A1298C polymorphism, a number of 19 studies contained 7424 cases and 8204 controls. Likewise, for C677T polymorphism, an increased risk of BC was seen for the allelic (OR 1.21, 95% CI 1.09–1.33, P < 0.01, I2 = 78.9%), dominant (OR 1.17, 95% CI 1.05–1.30, P < 0.01, I2 = 71.8%), recessive (OR 1.43, 95% CI 1.23–1.67, P < 0.01, I2 = 55.8%), and homozygous models (OR 1.48, 95% CI 1.25–1.75, P < 0.01, I2 59.9%) among BC patients compared to controls. Also, in terms of A1298C polymorphism, an association was found between the allelic (OR 1.15, 95% CI 1.04–1.28, P < 0.01, I2 70.4%) and homozygous models (OR 1.38, 95% CI 1.15–1.66, P < 0.01, I2 44.2%) with the risk of BC. In conclusion, findings revealed that MTHFR C677T variant might be a factor that predisposes BC in Asians. Furthermore, it was found that A1298C variant acts as a BC risk factor, particularly in a Western Asia population.
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The current study was funded by a Grant Number (#22963) from the Vice-chancellor for Research, Shiraz University of Medical Sciences, Shiraz, Iran.
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Rezaee, M., Akbari, H., Momeni-Moghaddam, M.A. et al. Association of C677T (rs1081133) and A1298C (rs1801131) Methylenetetrahydrofolate Reductase Variants with Breast Cancer Susceptibility Among Asians: A Systematic Review and Meta-Analysis. Biochem Genet 59, 367–397 (2021). https://doi.org/10.1007/s10528-020-10020-z
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DOI: https://doi.org/10.1007/s10528-020-10020-z