Research Article: Alterations of Autophagy Modify Lipids in Epidermal Keratinocytes
Abstract:
The human skin is composed of multiple barriers, among which the skin permeability barrier composed of lipids is one of the most important barrier functions. Changes in lipid content, structure and composition affect the skin condition. The lipids can be divided into sebaceous gland lipids or intercellular lipids. Sebaceous gland lipids mainly include squalene, triglycerides, cholesterol and cholesterol esters, while intercellular lipids mainly include ceramide, free fatty acids, cholesterol, etc. Lamellar bodies (LBs) in the epidermis are secretory organelles formed during the differentiation of keratinocytes (KCs) in the upper spinous layer and granular layer. It can deliver a variety of contents, including lipid precursors and enzymes related to the permeability barrier and antimicrobial peptides related to the antimicrobial barrier. Loss or dysfunction of LBs can result in a disruption of the skin barrier homeostasis and lead to various skin disorders.,,
Introduction:
The human skin is composed of multiple barriers, among which the skin permeability barrier composed of lipids is one of the most important barrier functions. Changes in lipid content, structure and composition affect the skin condition. The lipids can be divided into sebaceous gland lipids or intercellular lipids. Sebaceous gland lipids mainly include squalene, triglycerides, cholesterol and cholesterol esters, while intercellular lipids mainly include ceramide, free fatty acids, cholesterol, etc. Lamellar bodies…
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