期刊
ACTA BIOCHIMICA ET BIOPHYSICA SINICA
卷 55, 期 8, 页码 1213-1221出版社
SCIENCE PRESS
DOI: 10.3724/abbs.2023112
关键词
roof plate-specific spondin 1 (RSPO1); hair follicle stem cells; hair regeneration; Wnt/beta-catenin signaling pathway; mice
In this study, it was found that treatment with rRSPO1 can activate hair follicle stem cells in mice and accelerate hair regeneration. rRSPO1 improves hair follicle development and promotes hair growth by activating the Wnt/β-catenin signaling pathway.
Roof plate-specific spondin 1 (R-spondin1, RSPO1) is a Wnt/beta-catenin signaling pathway activator that binds with Wnt ligands to stimulate the Wnt/beta-catenin signaling pathway, which is key to hair regeneration. However, it is not clear whether recombinant RSPO1 (rRSPO1) affects hair regeneration. Here, we treat C57BL/6 male mice with rRSPO1 and investigate the expression of the Wnt/beta-catenin signaling pathway and the activation of hair follicle stem cells in the dorsal skin. The mouse skin color score and hair-covered area are determined to describe hair growth, and the skin samples are subjected to H&E staining, western blot analysis and immunofluorescence staining to evaluate hair follicle development and the expressions of Wnt/beta-catenin signaling pathway-related proteins. We find that rRSPO1 activates mouse hair follicle stem cells (mHFSCs) and accelerates hair regeneration. rRSPO1 increases the hair-covered area, the number of hair follicles, and the hair follicle diameter and length. Moreover, rRSPO1 enhances the activity of Wnt/beta-catenin signaling pathway-related proteins and the expressions of HFSC markers, as well as mHFSC viability. These results indicate that subcutaneous injection of rRSPO1 can improve hair follicle development by activating the Wnt/beta-catenin signaling pathway, thereby promoting hair regeneration. This study demonstrates that rRSPO1 has the potential to treat hair loss by activating the Wnt/beta-catenin signaling pathway.
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