Abnormal expression of long non-coding RNAs in myocardial infarction

Area of Science:

• Cardiovascular Biology
• Molecular Genetics
• Gene Expression Profiling

Background:

• Myocardial infarction (MI) remains a primary global cause of mortality.
• Understanding the molecular underpinnings of MI is crucial for developing effective treatments.

Purpose of the Study:

• To investigate dysregulated long non-coding RNAs (lncRNAs) in myocardial infarction (MI).
• To elucidate the underlying mechanisms of lncRNA involvement in MI pathogenesis.

Main Methods:

• Microarray analysis of lncRNA and mRNA expression in left ventricular tissues of MI and sham mice.
• Differential expression analysis, co-expression network construction, Gene Ontology (GO), and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis.
• Quantitative real-time polymerase chain reaction (qRT-PCR) for validation of differentially expressed lncRNAs.

Main Results:

• Identified 168 differentially expressed lncRNAs (DELs) and 126 differentially expressed mRNAs (DEMs) in MI.
• Constructed a co-expression network involving 219 nodes and 1775 edges.
• Validated specific lncRNAs (ENSMUST00000124047, AK166279, ENSMUST00000121611, NR_015515) with altered expression in MI.

Conclusions:

• The study identified a comprehensive profile of dysregulated lncRNAs and mRNAs in myocardial infarction.
• Enriched signaling pathways in MI include complement and coagulation cascades, and cytokine-cytokine receptor interactions.
• These findings contribute to understanding MI pathogenesis and may guide future therapeutic strategies.