Abstract
The stratum corneum is viewed currently as a layer of protein-enriched corneocytes embedded in a lipid-enriched, intercellular matrix [1], the so-called bricks and mortar model. The “bricks” are corneocytes surrounded by a cornified cell envelope made up of proteins, mainly loricrin, filaggrin, and involucrin, and covalently bound to the hydroxyceramide molecules of a lipid envelope. These “bricks” are embedded in a “mortar” of lipid bilayers [2–4]. The so-called mortar contains a variety of intercellular lipids including, ceramides, free sterols and sterolesters, cholesterolsulfate, and free fatty acids. The stratum corneum continually renews itself, and there is a steady state between the proliferation and differentiation process of keratinocytes and desquamation of corneocytes.
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Berardesca, E., Fluhr, J. (2010). Corneocyte Size and Cell Renewal: Effects of Aging and Sex Hormones. In: Farage, M.A., Miller, K.W., Maibach, H.I. (eds) Textbook of Aging Skin. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-89656-2_36
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DOI: https://doi.org/10.1007/978-3-540-89656-2_36
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