Stratum corneum proteins and lipid matrix

The stratum corneum proteins and lipid matrix comprises the structural proteins (notably keratin, involucrin, loricrin, filaggrin) that form the cornified envelope and the surrounding highly structured extracellular matrix of lipids (primarily ceramides, cholesterol, and free fatty acids). These components form a lamellar, gel-like barrier that protects against dehydration, chemical and microbial invasion, and mechanical trauma. The matrix's architecture is fundamental to the barrier function of the skin, with disruptions or imbalance contributing to dermatological disease. It is not a discrete molecular entity but rather a complex, dynamic assembly critical for skin physiology.

Other names

Stratum corneum barrierSC lipid-protein matrix

Restoration or enhancement of barrier lipids (e.g., exogenous ceramides replenish physiological SC lipids) Anti-inflammatory effect (topical corticosteroids reduce inflammation and normalize protein/lipid turnover) Softening and hydration (urea and moisturizers draw in or retain water)