Autophagy-Mediated Cellular Remodeling During Terminal Differentiation of Keratinocytes in the Epidermis and Skin Appendages

October 2024 in “ Cells ”

Leopold Eckhart, Флориан Грубер, Supawadee Sukseree

autophagy keratinocytes epidermis skin appendages lysosome-dependent degradation cellular remodeling programmed cell death epithelial differentiation

Studysummary The researchers reported that autophagy, a lysosome-dependent degradation mechanism, plays a significant role in the cellular remodeling of keratinocyte differentiation in the skin, affecting the properties of the differentiation products by altering cellular components during this process. Our plain-language summary of this paper — not a Tressless recommendation.

The document explores the critical role of autophagy in the terminal differentiation of keratinocytes, essential for forming the epidermis and skin appendages like hair and nails. Autophagy, a lysosome-dependent degradation process, facilitates the breakdown of organelles and proteins, crucial for remodeling keratinocytes into metabolically inactive structures. Studies using Atg7-deficient mice show that inhibiting autophagy leads to the accumulation of organelles and proteins, resulting in abnormalities such as thickened skin layers and impaired hair growth. The research highlights the interplay between autophagy and other degradation mechanisms, emphasizing its importance in maintaining normal skin structure and function, particularly under stress or aging conditions.

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