Apoptosis regulatory proteins in cardiomyocytes

Apoptosis regulatory proteins in cardiomyocytes represent a broad class of molecules that govern programmed cell death within the heart muscle. This group includes pro-apoptotic members such as Bax, Bak, and Caspases, as well as anti-apoptotic factors like Bcl-2 and Bcl-xL, which collectively maintain the balance between cell survival and death (PubMed: 29434357). In the context of cardiovascular diseases like myocardial infarction and heart failure, the activation of these proteins leads to the irreversible loss of cardiomyocytes, which have limited regenerative capacity, ultimately resulting in cardiac remodeling and pump failure (NIH: PMC5648600). Therapeutic strategies often focus on inhibiting pro-apoptotic pathways or enhancing survival signals to preserve myocardial function. While many cardiovascular drugs like beta-blockers and ACE inhibitors indirectly influence these proteins by reducing cellular stress, specific direct-acting small molecules are still largely in the experimental phase due to the risk of systemic toxicity (StatPearls: Cardiomyopathy).

Other names

Cardiac apoptotic regulatorsCardiomyocyte apoptosis signaling moleculesBcl-2 family proteins in heartCaspase-dependent signaling in cardiomyocytes

Drugs typically modulate these proteins indirectly by reducing oxidative stress, inhibiting pro-apoptotic signaling pathways (e.g., RAAS inhibition), or stabilizing mitochondrial membranes to prevent the release of cytochrome c.