Does Mitochondrial Dysfunction of Hair Follicle Epithelial Stem Cells Play a Role in the Pathobiology of Lichen Planopilaris?

Br J Dermatol. 2020 May 29. doi: 10.1111/bjd.19259. Online ahead of print.


Lichen planopilaris (LPP) is a difficult to treat condition leading to permanent hair loss and scarring. Pathobiologically, LPP shows T- cell mediated interferon-γ driven loss of keratin 15 (K15) positive hair follicle (HF) epithelial stem cells (eHFSCs) due to immune privilege (IP) collapse and pathological epithelial-mesenchymal transition (EMT). This exhausts the eHFSC pool; impacting the HF's capacity to regenerate and cycle and ultimately resulting in HF destruction, fibrosis and scarring.

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