Association of MicroRNA-155rs767649 Polymorphism with Susceptibility to Preeclampsia

Area of Science:

• Genetics
• Molecular Biology
• Obstetrics

Background:

• Preeclampsia (PE) is a complex pregnancy disorder.
• MicroRNAs (miRNAs) are implicated in the pathogenesis of PE.
• The role of specific miRNA polymorphisms in PE requires further investigation.

Purpose of the Study:

• To investigate the association between the miR-155 rs767649 polymorphism and preeclampsia.
• To evaluate serum expression levels of mature miR-155 in patients with PE.
• To determine if miR-155 genetic variations contribute to PE susceptibility.

Main Methods:

• Case-control study involving 80 PE patients and 80 healthy controls.
• Serum miR-155 expression quantified using real-time PCR.
• miR-155 rs767649 (T/A) polymorphism genotyped via TaqMan SNP genotyping.

Main Results:

• Significantly higher serum miR-155 expression in PE cases compared to controls (P<0.0001).
• The minor allele of rs767649 was significantly associated with an increased risk of PE (OR=5.240, P=0.001).
• Distinct miR-155 expression levels were observed among different genotypes in PE patients, with the TA genotype showing high expression (P<0.0001).

Conclusions:

• miR-155 plays a critical role in the pathogenesis of preeclampsia.
• The minor allele of the miR-155 rs767649 polymorphism may serve as a predisposing factor for PE.
• miR-155 expression levels are significantly altered in preeclampsia and correlate with specific genotypes.