Wound-healing pathways via paracrine growth factors and extracellular matrix interactions

Wound healing is a multi-phase biological process—comprising hemostasis, inflammation, proliferation, and remodeling—that relies on the intricate interplay between paracrine growth factors and the extracellular matrix (ECM) (StatPearls, 2023). Paracrine signaling, mediated by factors such as Platelet-Derived Growth Factor (PDGF), Transforming Growth Factor-beta (TGF-beta), and Fibroblast Growth Factor (FGF), coordinates the activities of fibroblasts, endothelial cells, and keratinocytes to restore tissue integrity (NIH, 2021). The ECM acts not only as a physical scaffold but also as a regulatory hub that sequesters growth factors and modulates their activity through interactions with cell-surface receptors like integrins (Nature Reviews Molecular Cell Biology, 2014). Dysregulation of these interactions is a hallmark of chronic wounds, such as diabetic foot ulcers, and fibroproliferative disorders like keloids (PubMed, 2020). Pharmacological interventions, including recombinant growth factors like Becaplermin, aim to supplement deficient signaling environments to jumpstart the healing cascade in stagnant wounds (FDA, 2022). However, therapeutic targeting of these pathways requires precise control to avoid complications such as excessive fibrosis or the promotion of tumor growth due to sustained mitogenic signaling (Journal of Clinical Investigation, 2017). The complexity of these interactions makes them a significant area of research for regenerative medicine and chronic disease management.

Other names

Wound healing cascadeTissue repair signalingGrowth factor-ECM crosstalkParacrine signaling in tissue repair

Activation of receptor tyrosine kinases (RTKs) and integrin-mediated signaling to promote cellular recruitment, extracellular matrix synthesis, and vascularization (StatPearls, 2023).