Role of MicroRNAs in regulating sarcoplasmic reticulum calcium handling and their implications for cardiomyocyte function and heart disease.

The regulation of calcium signaling within cardiomyocytes is pivotal for maintaining cardiac function, with disruptions in sarcoplasmic reticulum (SR) calcium handling linked to various heart diseases. This review explores the emerging role of microRNAs (miRNAs) in modulating SR calcium dynamics, highlighting their influence on cardiomyocyte maturation, function, and disease progression. We present a comprehensive overview of the mechanisms by which specific miRNAs, such as miR-1, miR-24, and miR-22, regulate key components of calcium handling, including ryanodine receptors, SERCA, and NCX. Notably, we identify critical research gaps, particularly the inconsistent findings regarding miRNA expression in heart disease and the need for standardized experimental conditions. Furthermore, we emphasize the potential of miRNAs as therapeutic targets, given their ability to influence calcium handling pathways and cardiac remodeling. The review also discusses the challenges in translating miRNA research into clinical applications, including the need for safe and effective delivery methods. By synthesizing current knowledge and identifying areas for future investigation, this review aims to provide insights into the therapeutic potential of miRNAs in diagnosing and treating heart diseases, ultimately contributing to improved patient outcomes.