Hughes Bethany K, Bishop Cleo L
Barts and the London Faculty of Medicine and Dentistry, Blizard Institute, Queen Mary University of London, 4, Newark Street, London E1 2AT, UK.
Biomedicines. 2022 Dec 2;10(12):3111. doi: 10.3390/biomedicines10123111.
Melanocytes reside within the basal epidermis of human skin, and function to protect the skin from ultraviolet light through the production of melanin. Prolonged exposure of the skin to UV light can induce irreparable DNA damage and drive cells into senescence, a sustained cell cycle arrest that prevents the propagation of this damage. Senescent cells can also be detrimental and contribute to skin ageing phenotypes through their senescence-associated secretory phenotype. Senescent cells can act in both an autocrine and paracrine manner to produce widespread tissue inflammation and skin ageing. Recently, melanocytes have been identified as the main senescent cell population within the epidermis and have been linked to a variety of skin ageing phenotypes, such as epidermal thinning and the presence of wrinkles. However, the literature surrounding melanocyte senescence is limited and tends to focus on the role of senescence in the prevention of melanoma. Therefore, this review aims to explore the current understanding of the contribution of senescent melanocytes to human skin ageing.
黑素细胞位于人类皮肤的基底层,其功能是通过产生黑色素来保护皮肤免受紫外线伤害。皮肤长期暴露于紫外线下会导致不可修复的DNA损伤,并促使细胞进入衰老状态,即一种持续的细胞周期停滞,可防止这种损伤的传播。衰老细胞也可能有害,并通过其衰老相关分泌表型导致皮肤老化表型。衰老细胞可以以自分泌和旁分泌的方式发挥作用,从而引发广泛的组织炎症和皮肤老化。最近,黑素细胞已被确定为表皮内主要的衰老细胞群体,并与多种皮肤老化表型有关,如表皮变薄和皱纹的出现。然而,关于黑素细胞衰老的文献有限,且往往侧重于衰老在预防黑色素瘤中的作用。因此,本综述旨在探讨目前对衰老黑素细胞在人类皮肤老化中所起作用的理解。