生物
细胞生物学
泛素连接酶
表皮(动物学)
泛素蛋白连接酶类
毛囊
内分泌学
泛素
解剖
生物化学
基因
作者
Yan‐Hui Lin,Weibo Tang,Peijun Huang,Zhendong Wang,Lian Duan,Changping Jia,Ruizhen Sun,Li Liu,Jingling Shen
摘要
Abstract Background A precise balance between the proliferation and differentiation of epidermal progenitors is required to achieve the barrier function during the development of epidermis. During the entire process of skin development, the newly formed basal layer cells divide, differentiate, and migrate outward to the surface of the skin, which is tightly regulated by a series of events related to cell cycle progression. The CRL4 DTL complex (Cullin 4 RING ligase, in association with the substrate receptor DTL) has long emerged as a master regulator in various cellular processes, which mediates the degradation of key cell cycle proteins. However, the roles of DTL in regulating epidermal morphogenesis during skin development remain unclear. Results We showed that DTL deficiency in epidermal progenitor cells leads to defects in epidermal stratification and loss of hair follicles accompanied by reduced epidermal progenitor cells and disturbed cell cycle progression during skin development. Transcriptome analysis revealed that p53 pathway is activated in DTL‐depleted epidermal progenitor cells. The apoptosis of epidermal cells showed in DTL deficiency mice is rescued by the absence of p53, but the proliferation and differentiation defects were p53‐independent. Conclusion Our findings indicate that DTL plays a vital role in epidermal malformation during skin development.
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