T-lymphocytes and broader immune cell populations modulated by UC-MSC secretome

T-lymphocytes and broader immune cell populations modulated by the UC-MSC secretome represent a complex biological system rather than a single molecular target. Umbilical cord-derived mesenchymal stem cells (UC-MSCs) exert potent immunomodulatory effects by releasing a diverse array of bioactive molecules, including cytokines, chemokines, and extracellular vesicles, collectively known as the secretome (Guillén et al., 2021, Guillén et al., 2021). This secretome interacts with various immune cells, such as T-lymphocytes, B-lymphocytes, natural killer (NK) cells, and macrophages, to suppress excessive inflammatory responses and promote immune tolerance (Aggarwal & Pittenger, 2005, Aggarwal & Pittenger, 2005). Specifically, the secretome can inhibit the proliferation of effector T-cells and induce the differentiation of regulatory T-cells (Tregs), which are crucial for maintaining self-tolerance (Song et al., 2020, Song et al., 2020). These interactions are being explored for therapeutic applications in treating autoimmune diseases, graft-versus-host disease (GvHD), and chronic inflammatory conditions (Le Blanc et al., 2008, Le Blanc et al., 2008). Because this target encompasses an entire cellular network and its paracrine signaling environment, it does not fit the definition of a discrete therapeutic receptor or enzyme.

Other names

UC-MSC-modulated immune cellsMesenchymal stem cell-responsive immune cell populationsImmune cells affected by umbilical cord MSC paracrine factors

Paracrine modulation of immune cell activity via secretion of anti-inflammatory cytokines (e.g., IL-10, TGF-beta), metabolic enzymes (e.g., IDO), and extracellular vesicles that inhibit pro-inflammatory T-cell activation and promote Treg expansion (Aggarwal & Pittenger, 2005; Guillén et al., 2021).