Multiple cell types and signaling pathways via paracrine cargo delivery

Multiple cell types and signaling pathways via paracrine cargo delivery refers to a sophisticated mode of intercellular communication where a donor cell secretes bioactive molecules to alter the function of nearby recipient cells. This process is primarily mediated through the release of the secretome, which includes soluble factors and extracellular vesicles (EVs) such as exosomes (Source: Nature Reviews Molecular Cell Biology, 2018). These vesicles carry a diverse cargo of proteins, lipids, and nucleic acids, including microRNAs, which can simultaneously activate multiple signaling pathways across different cell types (Source: Stem Cell Research & Therapy, 2021). In regenerative medicine, this mechanism is the primary way Mesenchymal Stem Cells (MSCs) promote tissue repair and immunomodulation without the need for direct cell engraftment. Conversely, in oncology, tumor-derived paracrine cargo can reprogram the tumor microenvironment to facilitate metastasis and drug resistance (Source: Journal of Hematology & Oncology, 2017). Because it involves a collective of molecules rather than a single entity, it is characterized as a biological process or therapeutic mechanism rather than a discrete molecular target. Therapeutic strategies often aim to either inhibit these pathways in disease states or engineer synthetic vesicles to mimic this delivery system for drug transport.

Other names

Paracrine signalingExtracellular vesicle-mediated communicationExosome-mediated cargo deliverySecretome-based signalingIntercellular communication

Intercellular transfer of bioactive cargo (proteins, RNAs, lipids) via extracellular vesicles or direct secretion to modulate recipient cell behavior across multiple signaling pathways.