Extracellular matrix (Dermal) (ECM)

The dermal extracellular matrix (ECM) is a complex, three-dimensional network of macromolecules, including collagen, elastin, and glycosaminoglycans, that provides structural and biochemical support to skin cells (StatPearls, 2023). In the context of chronic wounds, the dermal matrix is pathologically altered, characterized by excessive degradation by matrix metalloproteinases (MMPs) and a failure to support normal cellular activities such as migration and proliferation (Schultz & Wysocki, 2009). This degradation creates a hostile microenvironment that prevents the wound from progressing through the normal stages of healing (Nunan et al., 2014). Therapeutic strategies targeting the chronic wound dermal matrix involve the use of enzymatic debriding agents like collagenase to remove damaged tissue, growth factors like becaplermin to stimulate repair, or acellular dermal matrices to provide a fresh scaffold for tissue regeneration (FDA, 1997; Nunan et al., 2014). By restoring the integrity and function of the matrix, these interventions aim to facilitate the recruitment of fibroblasts and keratinocytes, ultimately leading to successful wound closure and tissue remodeling.

Other names

Dermal extracellular matrixWound bed matrixDermal scaffoldChronic wound environmentAcellular dermal matrix

Providing a structural scaffold for cellular migration and proliferation, sequestering and protecting endogenous growth factors from proteolytic degradation, and modulating the inflammatory microenvironment to promote the transition from the inflammatory to the proliferative phase of healing.