Association between miR-146a C > G, miR-149 T > C, miR-196a2 T > C, and miR-499 A > G polymorphisms and susceptibility to idiopathic recurrent pregnancy loss
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A growing body of evidence suggests that microRNAs play fundamental regulatory roles in embryo implantation and maintenance of pregnancy. The aim of this study was to investigate the possible association between miR-146a C > G, miR-149 T > C, miR-196a2 T > C, and miR-499 A > G polymorphisms and genetic susceptibility to recurrent pregnancy loss (RPL).
Material and methods
One hundred and twenty women with a history of two or more unexplained consecutive miscarriages and 90 ethnically matched healthy women with a history of at least two successful pregnancy outcomes and without a history of miscarriage were enrolled in a case-control study. Genotyping was performed using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method.
Our findings showed that the prevalence of miR-149 T > C polymorphism in RPL patients was significantly higher than those in healthy controls (p < 0.05). We also found that the presence of miR-149 C and miR-499 G alleles was significantly associated with susceptibility to RPL (p < 0.05). The miR-146a CC/miR-499 GG, miR-149 TC/miR-499 AG, and miR-196a2 TT/miR-499 GG combined genotypes were associated with the high risk of RPL (p < 0.05).
This study suggests that miR-149 T > C polymorphism and the presence of miR-149 C, and miR-499 G alleles are a genetic determinant for the risk of idiopathic RPL.
KeywordsmiR-146a C > G miR-149 T > C miR-196a2 T > C miR-499 A > G Polymorphism Recurrent pregnancy loss
Authors would like to express their sincerest appreciation to all subjects for participating in this study.
Compliance with ethical standards
This project was approved by faculty of sciences, Islamic Azad University of Tabriz branch, Tabriz, Iran on 2016-05-12. the questionnaires were taken by research committee of faculty of sciences and then they were reviewed in accordance with research ethical standards to provide ethical code and finally they were archived there confidential, so we don't access to them now.
Conflict of interest
The authors declare that they have no conflicts of interest.
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