Human skin cell membrane

The human skin cell membrane is a complex biological structure that serves as the primary protective barrier between the internal environment and external stressors. It consists of the plasma membranes of various skin cells, most notably keratinocytes, and the specialized lipid matrix of the stratum corneum [1]. Its primary biological functions include regulating water loss, preventing the entry of pathogens, and facilitating cell-to-cell communication through specialized junctions such as desmosomes [2]. In clinical contexts, the membrane is often viewed as a barrier to be overcome for transdermal drug delivery or a structure to be repaired in inflammatory skin conditions like atopic dermatitis [3]. While not a single molecular target, its lipid and protein components are the focus of treatments involving emollients, penetration enhancers, and barrier-repairing formulations [4]. Understanding its composition is vital for optimizing the efficacy and safety of topical dermatological therapies [5]. [1] Proksch, E., et al. (2008). "The skin: an indispensable barrier." Experimental Dermatology. [2] Elias, P. M. (2005). "Stratum corneum barrier function: indications and mechanisms of action." Journal of Investigative Dermatology. [3] Bouwstra, J. A., & Ponec, M. (2006). "The skin barrier in healthy and diseased state." Biochimica et Biophysica Acta (BBA) - Biomembranes. [4] Trommer, H., & Neubert, R. H. (2006). "Overcoming the stratum corneum: the modulation of skin penetration." Skin Pharmacology and Physiology. [5] Prausnitz, M. R., & Langer, R. (2008). "Transdermal drug delivery." Nature Biotechnology.

Other names

Keratinocyte plasma membraneDermal cell membraneEpidermal cell membraneStratum corneum lipid bilayer

Drugs typically interact with skin cell membranes by altering lipid bilayer fluidity, disrupting desmosomal proteins to increase permeability, or replenishing essential lipids to restore barrier integrity [4, 5].