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This study concluded that the CXCL12–CXCR4 signaling pathway significantly contributes to hair loss in androgenetic alopecia and alopecia areata by promoting inflammation and fibrosis, whereas inhibiting this pathway can restore hair growth and follicle health.

This study found that regulatory T cells accumulate in hair follicle epithelium via the Cxcr4-Cxcl12 axis, partially influenced by glucocorticoid receptor signaling, promoting hair regeneration; similar mechanisms were observed in human and murine skin.

In mouse models, this study showed that transplanted dermal papilla and dermal sheath cells can integrate into hair follicles, promoting hair growth and extended anagen phases, with their effectiveness influenced by factors such as immune response and cell passage number.

This study found that CXCL12 inhibits hair growth via the CXCR4/STAT signaling pathway, suggesting that targeting this pathway could be a promising approach for promoting hair growth.

In this study, blocking the CXCR3 receptor in mice prevented the development of alopecia areata by inhibiting the accumulation of specific T cells in the skin, suggesting a potential therapeutic approach for humans.