Skin stratum corneum structural components (SC structural components)

The skin stratum corneum structural components constitute the outermost layer of the epidermis, serving as the primary physical and chemical barrier between the body and the external environment. This structure is characterized by the "brick and mortar" model, where terminally differentiated keratinocytes, known as corneocytes, are embedded in a lipid-rich extracellular matrix consisting of ceramides, cholesterol, and free fatty acids (StatPearls, 2023). Key proteins such as filaggrin, loricrin, and involucrin are essential for the formation of the cornified envelope, which provides mechanical strength and serves as a scaffold for lipid organization (PubMed, PMID: 22435351). The primary biological functions of these components include the prevention of transepidermal water loss (TEWL), protection against microbial pathogens, and defense against environmental stressors like UV radiation (NIH, PMC5967208). Dysregulation or genetic mutations in these structural elements, particularly filaggrin, are strongly linked to the development of atopic dermatitis, psoriasis, and various forms of ichthyosis (PubMed, PMID: 18498517). Therapeutic interventions often involve the topical application of barrier-repairing lipids or humectants to restore skin integrity and alleviate symptoms of xerosis and inflammation (Journal of Clinical Medicine, 2019).

Other names

Skin barrierCornified envelopeEpidermal barrier componentsCorneocyte-lipid matrix

Restoration of the lipid bilayer, enhancement of the cornified envelope integrity, and promotion of natural moisturizing factors (NMF) to reduce transepidermal water loss (TEWL).