Th1 Effector CD4 T Cells Rely on IFN-γ Production to Induce Alopecia Areata

May 2025

Samuel Connell, Sydney B. Crotts, Ryan J. Reis, Maddison Lensing, P. Kahl, Nicholas Henderson, Otgonzaya Ayush, Zhaowen Zhu, Luana dos Santos Ortolan, John T. Harty, Joan Goverman, Ali Jabbari

alopecia areata CD4 T cells Th1 effector IFN-γ autoimmune disease CD8 T cells AA interferon gamma

TLDR CD4 T cells need IFN-γ to cause hair loss in alopecia areata.

This study investigates the role of CD4 T cells in alopecia areata (AA), an autoimmune disease characterized by hair loss. The researchers found that CD4 T cells from the skin draining lymph nodes of AA mice could transfer the disease to recipient mice, exhibiting a Th1 effector profile. The pathogenic activity of these CD4 T cells required the presence of endogenous CD8 T cells and host IFN-γ responsiveness. Importantly, deleting IFN-γ production in CD4 T cells prevented disease transfer. These findings enhance the understanding of AA development and suggest potential new therapeutic strategies for human patients.

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Research cited in this study

17 / 17 results

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The Contributory Roles of Th17 Lymphocyte and Cytotoxic T Lymphocyte at the Hair Bulge Region and Hair Bulb Area in Chronic Alopecia Areata Patients

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