Dermal extracellular matrix

The **dermal extracellular matrix** is not a single molecule or receptor, but a complex and dynamic network of macromolecules that fills the spaces between cells in the dermis of the skin. It consists of fibrous proteins (mainly collagens, especially type I and III, and elastin), proteoglycans, glycosaminoglycans (such as hyaluronic acid, chondroitin sulfate), and glycoproteins (such as fibronectin and laminins). This matrix is produced primarily by dermal fibroblasts and serves several critical roles: providing structural support and tensile strength, regulating cellular behaviors (migration, proliferation, differentiation), guiding developmental and wound repair processes, and mediating cell-matrix and cell-cell signaling interactions. The composition and regulation of the dermal ECM change in response to physiological cues, aging, and pathological states (such as chronic wounds and fibrosis, e.g., keloid formation). Dysregulation of the ECM can contribute to skin diseases related to poor healing or excessive scarring[1][2][4][5][7][8]. Notes: - The term "dermal extracellular matrix" does _not_ refer to a single therapeutic target, receptor, or molecular entity, but rather to a heterogeneous, tissue-level structure and environment. It is thus "incorrect" as a drug target in the sense of being a single discrete protein, enzyme, transporter, or receptor. - The ECM’s biological functions, composition, and implications in disease are well-established, but it is better described as a _targeted compartment or process_, not as a precise molecular drug target.

Other names

Skin extracellular matrixECM of skinDermal ECMCutaneous extracellular matrix