Emerging Role of Dermal White Adipose Tissue in Modulating Hair Follicle Development During Aging

被引:13
|
作者
Chen, Jian [1 ]
Fan, Zhe-Xiang [1 ]
Zhu, De-Cong [1 ]
Guo, Yi-Long [1 ]
Ye, Ke [1 ]
Dai, Damao [1 ]
Guo, Zhi [1 ]
Hu, Zhi-Qi [1 ]
Miao, Yong [1 ]
Qu, Qian [1 ]
机构
[1] Southern Med Univ, Dept Plast & Aesthet Surg, Nanfang Hosp, Guangzhou, Peoples R China
基金
中国国家自然科学基金;
关键词
aging; hair follicle; dermal white adipose tissue; inflamm-aging; microenvironment; STEM-CELL ACTIVATION; VERATRIC ACID; SENESCENT CELLS; GROWTH; EXPRESSION; NICHE; SKIN; APOPTOSIS; ANAGEN; MELANOGENESIS;
D O I
10.3389/fcell.2021.728188
中图分类号
Q2 [细胞生物学];
学科分类号
071009 ; 090102 ;
摘要
Hair follicle stem cells are extensively reprogrammed by the aging process, manifesting as diminished self-renewal and delayed responsiveness to activating cues, orchestrated by both intrinsic microenvironmental and extrinsic macroenvironmental regulators. Dermal white adipose tissue (dWAT) is one of the peripheral tissues directly adjacent to hair follicles (HFs) and acts as a critical macroenvironmental niche of HF. dWAT directly contributes to HF aging by paracrine signal secretion. However, the altered interrelationship between dWAT and HF with aging has not been thoroughly understood. Here, through microdissection, we separated dWAT from the skin of aged mice (18 months) and young mice (2 months) in telogen and depilation-induced anagen for transcriptome comparing. Notably, compared with young dWAT, aberrant inflammatory regulators were recapitulated in aging dWAT in telogen, including substantial overexpressed inflammatory cytokines, matrix metalloproteinases, and prostaglandin members. Nonetheless, with anagen initiation, inflammation programs were mostly abolished in aging dWAT, and instead of which, impaired collagen biosynthesis, angiogenesis, and melanin synthesis were identified. Furthermore, we confirmed the inhibitory effect on hair growth of CXCL1, one of the most significantly upregulated inflammation cytokines in aging dWAT. Besides this, we also identified the under-expressed genes related to Wnt signaling fibroblast growth factor family members and increased BMP signaling in aging dWAT, further unraveling the emerging role of dWAT in aging HFs malfunction. Finally, we proved that relieving inflammation of aging dWAT by injecting high-level veratric acid stimulated HF regenerative behavior in aged mice. Concomitantly, significantly decreased TNF-a, CCL2, IL-5, CSF2, and increased IL10 in dWAT was identified. Overall, the results elaborated on the complex physiological cycling changes of dWAT during aging, providing a basis for the potential regulatory effect of dWAT on aging HFs.
引用
收藏
页数:16
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