Stratum corneum intercellular lipid lamellae (SC lipid lamellae)

The stratum corneum intercellular lipid lamellae constitute the primary permeability barrier of the human skin, located between the corneocytes of the outermost epidermal layer (StatPearls: Skin Anatomy, 2023). This complex matrix is predominantly composed of ceramides, cholesterol, and free fatty acids organized into highly ordered lamellar structures, specifically the long periodicity phase and short periodicity phase (PubMed: PMCID PMC2835894). Its fundamental biological function is to prevent excessive transepidermal water loss (TEWL) and protect the body from environmental insults, including pathogens and chemical toxins (PubMed: PMCID PMC3105619). In various dermatological conditions such as atopic dermatitis and psoriasis, the composition and organization of these lipids are significantly altered, leading to barrier dysfunction and chronic inflammation (PubMed: PMCID PMC4252662). Therapeutic strategies often target this matrix by topically applying physiological lipids to restore the barrier's integrity or using occlusive agents to simulate its function (Journal of Clinical and Aesthetic Dermatology, 2014). Understanding the molecular architecture of these lamellae is crucial for developing effective transdermal drug delivery systems and skin repair treatments.

Other names

Skin lipid barrierIntercellular lipid matrixEpidermal lipid lamellaeStratum corneum lipid matrix

Restoration of the skin's permeability barrier through the replenishment of physiological lipids or the application of occlusive agents to prevent transepidermal water loss.