Myocardial tissue paracrine secretome and extracellular vesicles

The myocardial tissue paracrine secretome and extracellular vesicles (EVs) represent a complex signaling milieu rather than a single molecular target. This system facilitates intercellular communication within the heart through the secretion of proteins, lipids, and nucleic acids, often encapsulated in exosomes or microvesicles (PMC6551528). These factors play a pivotal role in cardiac repair following injury, such as myocardial infarction, by promoting angiogenesis, reducing fibrosis, and modulating the immune response (PMC7464845). In drug development, this system is primarily viewed as a therapeutic modality; for instance, cardiosphere-derived cells (CDCs) and their secretome (e.g., CAP-1002) are being investigated for their ability to deliver these regenerative signals to the myocardium (Capricor Therapeutics). Because it involves a heterogeneous mixture of bioactive molecules, the primary challenges involve standardization, potency assays, and understanding the synergistic effects of the various components. Consequently, while it is a focus of regenerative medicine, it does not fit the classical definition of a discrete pharmacological target.

Other names

Cardiac secretomeMyocardial extracellular vesiclesHeart-derived extracellular vesiclesParacrine signaling system of the heart

Paracrine signaling and horizontal transfer of bioactive molecules (miRNAs, proteins, and lipids) to recipient cells to promote tissue repair and cytoprotection.