Epidermal keratinocyte cell membrane integrity disruption

Epidermal keratinocyte cell membrane integrity disruption" refers to pathological loss of the structural barrier formed by keratinocyte plasma membranes in the epidermis. This loss of integrity can be induced by a variety of mechanisms including lytic cell death (such as necroptosis, calcium-influx-dependent lysis via TRPV3, or excessive apoptosis), alterations of membrane lipid domains (especially cholesterol-dependent lipid rafts), and external injuries such as solvent exposure. Disruption leads to impaired barrier function, initiating inflammation, increased permeability to pathogens and environmental irritants, and triggering compensatory keratinocyte proliferation and differentiation. No single molecule or receptor defines this entity; rather, it encompasses a constellation of processes and regulatory pathways central to skin pathology and injury responses [1][2][3][4][5][6].

TRPV3-mediated calcium influx leading to lytic cell death; Cholesterol depletion disrupting lipid rafts and signaling; Loss of apoptosis inhibition (e.g., via cFLIP, IAP inhibition) causing excessive keratinocyte death