Microarray profiling of long non-coding RNA (lncRNA) associated with hypertrophic cardiomyopathy

Area of Science:

• Genomics
• Molecular Biology
• Cardiovascular Research

Background:

• Hypertrophic cardiomyopathy (HCM) is a genetic heart disease with numerous mutations, but underlying molecular mechanisms remain unclear.
• Long non-coding RNAs (lncRNAs), comprising a large portion of the human genome, are implicated in various diseases.
• The role of regulatory lncRNAs in HCM pathogenesis has not been previously investigated.

Purpose of the Study:

• To identify myocardial long non-coding RNAs (lncRNAs) associated with hypertrophic cardiomyopathy (HCM).
• To characterize the functional roles of these lncRNAs in the molecular pathways of HCM.

Main Methods:

• Analysis of lncRNA and mRNA expression profiles in myocardial tissues from HCM patients and healthy controls using lncRNA microarrays.
• Validation of differential gene expression using real-time PCR.
• Gene Ontology (GO) and KEGG pathway analyses to identify biological functions and pathways associated with co-expressed mRNAs.

Main Results:

• Significant aberrant expression of approximately 1426 lncRNAs and 1715 mRNAs in HCM patients compared to controls.
• GO analysis revealed that co-expressed mRNAs are primarily involved in the translational process.
• Pathway analysis highlighted enrichment in ribosome and oxidative phosphorylation pathways for lncRNA-associated mRNAs.

Conclusions:

• Long non-coding RNAs (lncRNAs) play a role in the pathogenesis of hypertrophic cardiomyopathy (HCM).
• These lncRNAs modulate critical pathogenetic pathways, including translation, ribosome function, and oxidative phosphorylation, contributing to HCM development.