毛囊内黑素细胞研究进展

Advancements in Melanocytes in Hair Follicle

黑素母细胞,即黑素前体细胞,起源于神经嵴,部分迁移到毛囊,在毛囊内进一步分化成产色素的黑素细胞。毛囊内包含存在于外根鞘的、可作为黑素细胞“贮库”的未分化的黑素母细胞,以及毛球部有活性的黑素细胞。毛囊黑素细胞数目、寿命、黑素生成活性与毛发生长周期紧密结合在一起。灰发是由于毛囊内黑素干细胞不能完全维系所致。

Melanoblasts, the precursors to melanocytes, originate in the neural crest. Some melanoblasts can travel to the hair follicle and further differentiate into pigment melanin-producing melanocytes. Hair follicles contain a pool of undifferentiated melanocyte stem cells （MSCs） , which are sources of differentiated melanocytes, and functional melanocytes exhist in the hair bulb. The volume, life, and activity of melanocytes in a hair follicle is closely related with the growth cycle of follicle. Appearance of gray hair gray results from incomplete MSCs maintenance.