Unraveling Mechanisms of Scarring Alopecia in Discoid Lupus: Insights from Spatial Transcriptomics
July 2024
in “
Journal of Investigative Dermatology
”
scarring alopecia Discoid Lupus Erythematosus DLE Spatial Transcriptomics CD8+ T cells epithelial hair follicle stem cells fibrosis hair loss Cellular response Extracellular matrix formation Keratinization Collagen formation perifollicular dermis Flow cytometry CD34 CD62L T cell regions CD34+ stem cells scarring hair loss lupus hair follicle stem cells skin fibrosis hair thinning cell response matrix formation skin keratin collagen skin dermis stem cell therapy
TLDR CD8+ T cells attack hair follicle stem cells, causing scarring and hair loss in Discoid Lupus.
This study investigates the mechanisms of scarring alopecia in Discoid Lupus Erythematosus (DLE) using Spatial Transcriptomics on skin biopsies from mice and humans. The research highlights the role of CD8+ T cells in targeting epithelial hair follicle stem cells, leading to fibrosis and hair loss. In a lupus-prone mouse model, pathways such as 'Cellular response' and 'Extracellular matrix formation' were upregulated in diseased hair follicles. Genes related to 'Keratinization' and 'Collagen formation' were enriched in the perifollicular dermis. Flow cytometry revealed decreased CD34 in lesional skin, while CD62L was upregulated in T cell regions. Blocking CD62L in vitro increased CD34+ stem cells, suggesting potential therapeutic targets for scarring alopecia. Future studies aim to develop effective treatments for these disorders.
