Abstract
The aim of our study was to conduct a meta-analysis to assess whether combined evidence shows associations between C677T and A1298C polymorphisms of methylenetetrahydrofolate reductase (MTHFR) and genetic susceptibility to rheumatoid arthritis (RA). A total of 11 articles involving 20 comparisons were included, containing 12 comparisons for the MTHFR C677T polymorphism and 8 comparisons for the MTHFR A1298C polymorphism. Significant evidence was detected for the association of RA susceptibility with the MTHFR C677T polymorphism T allele under allelic contrast and dominant model in Asians (T versus C, OR = 1.300, 95 % CI = 1.104–1.531, p = 0.002; TT + CT versus CC, OR = 1.495, 95 % CI = 1.187–1.882, p = 0.001). Significant association between RA susceptibility and the MTHFR A1298C polymorphism A allele under recessive model was found in the overall meta-analysis (AA versus AC + CC, OR = 1.281, 95 % CI = 1.048–1.565, p = 0.016). Our meta-analysis results demonstrate that the MTHFR C677T polymorphism is involved in the genetic susceptibility of RA in Asians, and the MTHFR A1298C polymorphism is associated with genetic susceptibility to RA in the overall population. Given the paucity of studies, especially in non-Asian populations, further studies with larger sample sizes are required to elucidate the role of MTHFR polymorphisms in the genetic basis of RA in different ethnic populations.
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Acknowledgments
This work was supported by Zhejiang Provincial Key Laboratory of Pathophysiology, Nature Science Foundation of Ningbo city (Grant No. 2015A610205), Ningbo University Talent Project (F01256144702), School Research Foundation of Ningbo University (XKL14D2094, XKL14D2095), and K.C. Wong Magna Fund from Ningbo University.
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Han Cen and Hua Huang contributed equally to this work and should be considered as co-first author.
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Cen, H., Huang, H., Zhang, LN. et al. Associations of methylenetetrahydrofolate reductase (MTHFR) C677T and A1298C polymorphisms with genetic susceptibility to rheumatoid arthritis: a meta-analysis. Clin Rheumatol 36, 287–297 (2017). https://doi.org/10.1007/s10067-016-3348-0
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DOI: https://doi.org/10.1007/s10067-016-3348-0