Skin extracellular matrix hydration

"Skin extracellular matrix hydration" is not a discrete molecular target suitable for drug development. Instead, it describes a physiological property or functional outcome of the extracellular matrix (ECM) in skin. Skin hydration is a consequence of specific ECM components, not a target itself. The actual molecular components involved in ECM hydration include proteoglycans and glycosaminoglycans (GAGs), which regulate hydration primarily through their negative charge, attracting sodium ions and subsequently water molecules via osmosis. Key molecules contributing to this process are hyaluronic acid (a chief component of the interstitial gel), versican, decorin, and other glycosaminoglycans. Therapeutic targeting would involve specific molecular components like ECM proteins (e.g., hyaluronic acid, collagen types), enzymes regulating ECM composition (e.g., matrix metalloproteinases, lysyl oxidase), cell surface receptors mediating ECM interactions (e.g., CD44, integrins), or growth factor signaling pathways regulating ECM synthesis (e.g., TGF-β pathway).