Genetic variants in microRNA machinery genes are associated [corrected] with idiopathic recurrent pregnancy loss risk

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Yong Wook Jung1, Young Joo Jeon2, HyungChul Rah2

  • 1Department of Obstetrics and Gynecology, CHA Gangnam Medical Center, CHA University, Seoul, South Korea.

Plos One
|April 29, 2014
PubMed
Abstract

Insights

Genetic variations in miRNA machinery genes like RAN and DROSHA/DICER are linked to recurrent pregnancy loss (RPL) risk in Korean women. These findings highlight potential genetic factors influencing reproductive health.

Area of Science:

  • Reproductive biology
  • Genetics
  • Molecular biology

Background:

  • MicroRNA (miRNA) biogenesis pathways, involving key molecules like DROSHA, XPO5, and DICER, are active in the human placenta.
  • miRNAs play crucial roles in regulating uterine gene expression during the peri-implantation period and in maintaining maternal-fetal immune tolerance.

Purpose of the Study:

  • To investigate the association between genetic polymorphisms in miRNA machinery genes and idiopathic recurrent pregnancy loss (RPL) in Korean women.

Main Methods:

  • A case-control study was conducted with 338 women experiencing RPL and 238 controls.
  • Genotyping of DICER, DROSHA, RAN GTPase (RAN), and exportin-5 (XPO5) gene polymorphisms was performed using PCR-RFLP.
  • Logistic regression analysis and multifactor dimensionality reduction (MDR) were used to assess associations and gene-gene interactions.

Main Results:

  • Specific genotypes of RAN (rs14035) and combined genotypes of DICER/DROSHA, DICER/RAN, and DICER/XPO5 were significantly associated with altered RPL risk.
  • Certain allele combinations (DICER/DROSHA/RAN/XPO5) were found to be significantly more frequent in the RPL group.

Conclusions:

  • The study establishes a relationship between RPL development and polymorphisms in the miRNA machinery gene RAN, as well as combined genotypes of DROSHA and DICER.
  • These findings suggest that genetic variations in miRNA biogenesis genes may contribute to the etiology of idiopathic RPL.

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