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Estimating Bilateral Atrial Function by Cardiovascular Magnetic Resonance Feature Tracking in Patients with Paroxysmal Atrial Fibrillation
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Identification of microRNA-mRNA dysregulations in paroxysmal atrial fibrillation

David Y Chiang1, Min Zhang2, Niels Voigt3

  • 1Cardiovascular Research Institute, Baylor College of Medicine, Houston, TX, USA; Department of Molecular Physiology & Biophysics, Baylor College of Medicine, Houston, TX, USA.

International Journal of Cardiology
|February 24, 2015
PubMed
Abstract

Insights

This study reveals novel molecular pathways and microRNA-messenger RNA interactions involved in early atrial fibrillation (AF) development. Understanding these epigenetic changes, like miR-199a-5p and FKBP5, is key for future AF therapies.

Area of Science:

  • Cardiovascular Biology
  • Molecular Genetics
  • Epigenetics

Background:

  • The molecular basis of early atrial fibrillation (AF) development, particularly paroxysmal AF (pAF), is not fully understood.
  • Emerging research suggests microRNAs (miRNAs) play a role in pAF pathogenesis through epigenetic modifications.

Purpose of the Study:

  • To identify molecular alterations driving pAF by investigating abnormal miRNA-mRNA interactions.
  • To uncover key molecular changes associated with the early stages of AF.

Main Methods:

  • RNA sequencing and miRNA microarray analysis of atrial biopsies from pAF patients and sinus rhythm (SR) controls.
  • Bioinformatic analysis to identify differentially expressed genes and miRNAs, and predict miRNA-mRNA interactions.
  • Validation of predicted interactions using quantitative real-time PCR (qRT-PCR) and 3'UTR luciferase reporter assays.

Main Results:

  • 113 genes and 49 miRNAs were differentially expressed between pAF and SR groups.
  • Key pathways identified include the gonadotropin releasing hormone receptor and p53 pathways.
  • Confirmed a specific interaction: upregulation of miR-199a-5p and downregulation of FKBP5 in pAF patients.

Conclusions:

  • Combined transcriptomic and miRNA analysis identified novel pathways and miRNA-mRNA regulations potentially involved in pAF development.
  • The gonadotropin releasing hormone receptor and p53 pathways warrant further investigation in AF pathogenesis.
  • This study provides new insights into the molecular mechanisms underlying early AF.
Keywords:
Paroxysmal atrial fibrillationRNA sequencingTranscriptomic studymicroRNA

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