Pro-regenerative growth factor receptors

Pro-regenerative growth factor receptors on dermal fibroblasts represent a functional class of cell-surface proteins that mediate signals essential for skin repair and tissue regeneration. This group primarily includes receptor tyrosine kinases (RTKs) such as the platelet-derived growth factor receptors (PDGFRA and PDGFRB), fibroblast growth factor receptors (FGFRs), and the epidermal growth factor receptor (EGFR), as well as the serine/threonine kinase receptors for the transforming growth factor-beta (TGF-beta) family (Kulebyakin et al., 2020). These receptors are expressed on various fibroblast subpopulations, including pro-regenerative papillary fibroblasts, where they respond to ligands released during the wound healing process (Source 5.2.1). Activation of these receptors triggers intracellular signaling cascades, most notably the MAPK/ERK, PI3K/Akt, and SMAD pathways, which collectively drive fibroblast proliferation, chemotaxis, and the synthesis of extracellular matrix (ECM) components like collagen and elastin (Source 5.3.1). In therapeutic contexts, these receptors are targeted to treat chronic, non-healing wounds such as diabetic foot ulcers and pressure sores, where endogenous growth factor signaling is often impaired. For instance, the FDA-approved drug becaplermin is a recombinant PDGF-BB that targets PDGFRs to accelerate wound closure (Source 5.3.1). Conversely, excessive or dysregulated signaling through these receptors can lead to pathological fibrosis and hypertrophic scarring, making them targets for inhibitory strategies in fibrotic diseases (Source 5.3.3). Understanding the specific roles of different receptor isoforms, such as the mesenchymal-specific FGFR2c, is critical for developing targeted regenerative therapies that minimize off-target effects (Source 5.3.1).

Other names

Fibroblast growth factor receptors (FGFR)Platelet-derived growth factor receptors (PDGFR)Transforming growth factor-beta receptors (TGFBR)Epidermal growth factor receptor (EGFR)Insulin-like growth factor 1 receptor (IGF-1R)

Activation of transmembrane receptors (primarily receptor tyrosine kinases) by growth factor ligands, triggering downstream signaling pathways such as MAPK/ERK, PI3K/Akt, and SMAD to promote fibroblast activation, proliferation, and extracellular matrix production.