MicroRNA-2861 regulates programmed necrosis in cardiomyocyte by impairing adenine nucleotide translocase 1 expression

Area of Science:

• Cardiovascular Biology
• Molecular Cell Biology
• Genetics and Genomics

Background:

• Programmed necrosis is a critical cell death pathway in cardiac pathologies.
• MicroRNAs (miRNAs) are significant gene regulators, but their role in programmed cardiac necrosis remains unclear.
• Understanding miRNA involvement in cardiac necrosis is crucial for developing new treatments.

Purpose of the Study:

• To investigate the role of miR-2861 and adenine nucleotide translocase 1 (ANT1) in regulating programmed necrotic cell death in the heart.
• To elucidate the molecular mechanism by which miR-2861 and ANT1 interact to influence cardiac necrosis and myocardial infarction.

Main Methods:

• Investigated the effects of ANT1 on H2O2-induced and ischemia/reperfusion (I/R) model-induced cardiac necrosis in vitro and in vivo.
• Utilized molecular biology techniques to demonstrate direct binding of miR-2861 to ANT1 mRNA.
• Assessed the impact of miR-2861 manipulation (overexpression and knockdown) on ANT1 expression and cardiomyocyte necrosis.

Main Results:

• Adenine nucleotide translocase 1 (ANT1) was found to inhibit both H2O2-induced and I/R-induced myocardial necrosis.
• miR-2861 directly targets ANT1, suppressing its mRNA and protein expression, thereby inducing necrotic cell death.
• Knockdown of miR-2861 attenuated H2O2-induced necrosis and protected the heart from I/R injury in vivo.

Conclusions:

• miR-2861 and ANT1 form a regulatory axis controlling programmed cardiomyocyte necrosis and myocardial infarction.
• This axis represents a novel mechanism underlying cardiac cell death in cardiovascular diseases.
• Targeting the miR-2861/ANT1 pathway holds therapeutic potential for treating cardiac diseases characterized by necrosis.