Skin extracellular matrix water content

Skin extracellular matrix (ECM) water content is a physiological parameter representing the hydration status of the dermal and epidermal compartments, rather than a single molecular target. It is primarily maintained by the hygroscopic properties of ECM components, particularly hyaluronic acid and other glycosaminoglycans, which sequester water to provide tissue turgor and elasticity (Source: Papakonstantinou et al., 2012). This hydration is critical for the skin's barrier function, thermoregulation, and the diffusion of signaling molecules and nutrients (Source: Verdier-Sévrain & Bonté, 2007). Clinically, reduced skin water content is a hallmark of aging and various dermatological conditions, including xerosis and atopic dermatitis, where it contributes to pruritus and inflammation. While pharmacological interventions do not target "water content" as a protein, they aim to modulate it through the application of humectants, occlusives, or agents that stimulate the synthesis of water-binding ECM molecules. Consequently, it serves as a vital efficacy endpoint in the development of topical and systemic dermatological treatments.

Other names

Dermal hydrationCutaneous water contentSkin moistureInterstitial fluid of the dermis

Increasing water retention through humectant properties, occlusive barriers to prevent transepidermal water loss, or stimulating the synthesis of endogenous hygroscopic molecules like hyaluronic acid.