Histopathology of aging of the hair follicle

被引:36
作者
Fernandez-Flores, Angel [1 ,2 ,3 ]
Saeb-Lima, Marcela [4 ,5 ]
Cassarino, David S. [6 ]
机构
[1] Hosp El Bierzo, Dept Cellular Pathol, Ponferrada, Spain
[2] Biomed Invest Inst A Coruna, SB Res Grp, Dept CellCOM, La Coruna, Spain
[3] Hosp Reina, Dept Cellular Pathol, Ponferrada, Spain
[4] Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Dermatol, Mexico City, DF, Mexico
[5] Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Dept Dermatopathol, Mexico City, DF, Mexico
[6] Southern Calif Kaiser Permanente, LAMC, Dept Pathol, Los Angeles, CA USA
关键词
aging; graying; hair follicle; hair pigmentation; white hair; MELANOCYTE STEM-CELLS; OUTER ROOT SHEATH; ANTI-PD-L1; IMMUNOTHERAPY; SCALP HAIR; SENESCENT ALOPECIA; GROWTH; REPIGMENTATION; SKIN; PIGMENTATION; MELANOGENESIS;
D O I
10.1111/cup.13467
中图分类号
R75 [皮肤病学与性病学];
学科分类号
100206 ;
摘要
Hair follicles experience several changes with aging, the most noticeable of which is graying of the hair shaft due to loss of melanin. Additional changes in the diameter and length of the hair have contributed to the concept of senescent alopecia, which is different from androgenetic alopecia according to most. Graying happens in most individuals, although in different grades and starting at different ages. It is related to a decrease in the number and activity of the melanocytes of the hair bulb, which eventually completely disappear from the bulb of the white hair. Residual non-active melanocytes remain in the outer root sheath and in the bulge, which allows for repigmentation of the hair under certain stimuli or conditions.
引用
收藏
页码:508 / 519
页数:12
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