Lipid matrix of the stratum corneum (null)

The lipid matrix of the stratum corneum is a highly organized, multi-lamellar assembly of ceramides, cholesterol, and free fatty acids that fills the extracellular space between keratin-filled dead skin cells (corneocytes) in the outermost layer of the epidermis[3][5][7][8]. This lipid assembly functions as the skin's primary barrier against excessive water loss, chemical insult, and pathogen invasion[3][5][7]. Its physical structure consists of stacked bilayers (“lamellae”) with characteristic periodicities (short and long periodicity phases), shaped by the relative proportions and molecular arrangement of its lipid components[1][3][8]. The health and function of the skin barrier depend critically on the integrity and composition of this matrix, which is altered in numerous skin diseases including atopic dermatitis, ichthyosis, and other conditions marked by barrier dysfunction[3][7][8]. Drug or cosmetic interventions target the lipid matrix primarily to restore normal barrier function or to enhance transdermal delivery[4][7]. In summary, the Lipid matrix of the stratum corneum is not an individual target molecule or receptor but a unique extracellular lipid structure essential for skin permeability and protection, with implications in health, disease, and topical drug delivery[3][5][7][8].

Other names

Stratum corneum lipid matrixSC lipid matrixextracellular lipid matrix of stratum corneum

Restoration or modification of lipid lamellae to enhance or repair barrier function; Disruption or modification of lipid organization to increase permeability (as in drug delivery)