The PD-1/PD-L1 pathway in murine hair cycle transition: a potential anagen phase regulator

The PD-1/PD-L1 pathway in murine hair cycle transition: a potential anagen phase regulator
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小鼠毛发周期转变中的 PD-1/PD-L1 通路:潜在的毛发生长初期调节剂

DOI:
10.1007/s00403-020-02169-9
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发表时间:
2021-01
影响因子:
3
通讯作者:
Qinping Yang
Qinping Yang
中科院分区:
医学3区
文献类型:
--
作者:
Lijuan Zhou;Liang Wen;Youyu Sheng;Jianghao Lu;Ruiming Hu;Xuchao Wang;Zhongfa Lu;Qinping Yang

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程序性细胞死亡蛋白-1 (PD-1)主要被认为是一种参与免疫耐受调节的抑制受体。然而,最近的研究表明,PD-1/PD-L1信号也可以调节非免疫细胞的功能,并可能参与调节毛发生物学。在这项研究中,我们在脱毛诱导的毛发循环小鼠模型中发现,PD-1/PD-L1在小鼠表皮和毛囊(HF)中以毛发周期依赖的方式表达。在HF形态发生过程中,PD-1的表达在生长期明显低于衰竭期和休止期。与生长期和休止期相比,衰退期PD-L1表达增强。此外,直接阻断PD-L1不仅可以加速毛发生长期的开始,还可以延缓毛发生长的进程。总之,我们的研究结果表明,PD-1/PD-L1信号可能在头发周期转变中起负调控作用。因此,抗pd -1/PD-L1治疗可能是治疗生长素减少的脱发的一种有希望的策略。
Programmed cell death protein-1 (PD-1) is primarily recognized as an inhibitory receptor involved in the regulation of immunological tolerance. However, recent studies have indicated that PD-1/PD-L1 signaling could also regulate the functions of nonimmune cells and may be involved in regulating hair biology. In this study, we showed in a mouse model of depilation-induced hair cycling that PD-1/PD-L1 are expressed in the murine epidermis and hair follicle (HF) in a hair cycle-dependent manner. During HF morphogenesis, PD-1 expression was strongly decreased during the anagen phase compared with the catagen and telogen phases. PD-L1 expression was enhanced during the catagen phase compared with the anagen and telogen phases. Moreover, direct blockade of PD-L1 not only accelerated hair anagen phase onset but also delayed catagen progression. In conclusion, our findings indicated that PD-1/PD-L1 signaling may act as a negative regulator of hair cycle transition. Anti-PD-1/PD-L1 therapy may thus be a promising strategy for treating anagen-reduced hair loss.
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