Multiple cytokines and growth factor pathways via paracrine cellular modulation

Multiple cytokines and growth factor pathways via paracrine cellular modulation refers to a complex therapeutic mechanism rather than a single molecular target. This process involves the secretion of a broad spectrum of bioactive molecules—including anti-inflammatory cytokines (e.g., IL-10), pro-angiogenic factors (e.g., VEGF), and various growth factors—by administered cells, most commonly mesenchymal stem cells (MSCs) (Caplan & Correa, 2011). These secreted factors act on neighboring cells within the local microenvironment to suppress pathological immune responses, stimulate tissue regeneration, and promote angiogenesis (Galipeau & Sensébé, 2018). Unlike traditional drugs that target a specific receptor or enzyme, this approach leverages the bystander effect to modulate multiple signaling pathways simultaneously (Vizoso et al., 2017). It is primarily utilized in the treatment of inflammatory and degenerative conditions such as graft-versus-host disease (GvHD) and Crohn's disease (Liang et al., 2014). Because this term encompasses a broad network of interactions rather than a discrete protein, it is classified as a mechanism of action or a physiological process rather than a conventional drug target.

Other names

Paracrine signalingMSC secretome-mediated modulationBystander effectCellular paracrine modulation

Modulation of the local microenvironment through the coordinated secretion of multiple bioactive factors—including cytokines, chemokines, and growth factors—that act on adjacent cells to restore homeostasis and promote tissue repair (Caplan & Correa, 2011).