Physical barrier of the epidermis

The physical barrier responsible for moisture retention at the wound site is chiefly provided by the stratified structure of the epidermis, with the outermost layer (the stratum corneum) acting as the principal barrier to both water loss and external insults[2][6]. In wound healing, restoration of this barrier involves re-epithelialization—keratinocyte migration and proliferation—leading to new stratified layers that prevent dehydration and infection[1][2][3][7]. Therapeutically, this function can be mimicked or supported by occlusive dressings and topical emollients which create an artificial barrier that maintains moisture (thus facilitating re-epithelialization and reducing desiccation/dehydration), shields the wound from pathogens, and promotes optimal healing conditions[6]. "Physical barrier/moisture retention at wound site" is a clinical goal or strategy rather than a molecular target or receptor in the classical sense. Because there is no single molecule or receptor representing "physical barrier/moisture retention," this entry should be considered incorrect for molecular target curation[2][6]. If you need details on specific molecular mediators of the skin barrier (such as keratins, filaggrin, ceramides, or aquaporins), please specify, and those can be described in canonical target detail.

Other names

Skin barriermoisture barrierepidermal barrierstratum corneum barrierbarrier function

Physical occlusion to prevent water loss; Forming a protective film to restore/moisturize wound surface; Supporting re-epithelialization and barrier restoration