Integrated analysis of mRNA and microRNA expression profiles reveals differential transcriptome signature in...

Area of Science:

• Cardiovascular Biology
• Molecular Medicine
• Genomics

Background:

• Cardiac remodelling is a hallmark of heart failure (HF), impacting conditions like ischemic cardiomyopathy (ICM) and dilated cardiomyopathy (DCM).
• MicroRNAs (miRNAs) and messenger RNAs (mRNAs) are implicated as diagnostic and therapeutic targets in HF, but their joint regulatory mechanisms remain poorly understood.
• Understanding these molecular interactions is crucial for developing effective treatments for HF.

Purpose of the Study:

• To investigate the mechanisms of microRNA-mRNA joint regulation in heart failure.
• To identify key genes and pathways involved in ICM and DCM-induced HF.
• To discover novel diagnostic and therapeutic targets for HF.

Main Methods:

• Analysis of three gene expression profiles from patients with and without HF.
• Weighted Gene Co-Expression Network Analysis (WGCNA) to identify key genes in ICM and DCM.
• MicroRNA-mRNA interaction network analysis and pathway analysis.

Main Results:

• Shared differentially expressed miRNAs and mRNAs with significant biological functions were identified.
• The study pinpointed miR-542-3p and its target gene CILP as potentially involved in the TGF-β signaling pathway in ICM-induced HF.
• A novel mechanism involving miR-542-3p-CILP in the TGF-β signaling pathway was proposed for mediating ICM-induced HF.

Conclusions:

• The miR-542-3p-CILP interaction within the TGF-β signaling pathway represents a potential novel mechanism in ICM-induced HF.
• This study provides novel molecular targets for the diagnosis and therapeutic treatment of ICM- and DCM-induced HF.
• Further research into these identified targets could lead to improved management of heart failure.