Epidermal keratinocyte membrane lipids

Epidermal keratinocyte membrane lipids, primarily located within the stratum corneum, constitute the essential extracellular matrix that forms the skin's permeability barrier [StatPearls, 2023]. These lipids are organized into lamellar bilayers consisting of a specific ratio of ceramides, cholesterol, and free fatty acids [Journal of Investigative Dermatology, 2012]. Their primary biological function is to prevent excessive transepidermal water loss (TEWL) and protect the body from environmental insults, including pathogens and allergens [PubMed, 2020]. In various dermatological conditions such as atopic dermatitis and psoriasis, the composition and organization of these lipids are significantly altered, leading to barrier dysfunction [NIH, 2021]. Therapeutic interventions often involve the topical application of physiological lipid mixtures or occlusive agents to restore barrier integrity and alleviate symptoms of dryness and inflammation [Dermatologic Therapy, 2021]. Understanding the complex interplay of these lipids is crucial for developing effective treatments for skin barrier-related diseases.

Other names

Stratum corneum lipidsSkin barrier lipidsEpidermal lipidsIntercellular lipids of the stratum corneum

Restoration of the skin's permeability barrier by replenishing essential lipids (ceramides, cholesterol, and fatty acids) or providing an occlusive layer to prevent transepidermal water loss (TEWL).