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This review discusses current and potential treatments for alopecia areata, focusing on immunosuppressive and immunomodulatory approaches, but provides no new clinical results.

Alopecia areata patients have more activated T cells in their blood, which may help in developing treatments.

This study showed that in C3H/HeJ mice, focal follicular inflammation starts before overt hair loss, with inflammation severity possibly reaching a threshold causing hair follicle dystrophy prior to visible hair loss.

This study identified dynamic changes in DNA methylation associated with different growth stages in Tan sheep, which may offer insights to retain their valuable curly fleece as they age.

This review discusses the role of immune responses, especially Th1 cytokines, in alopecia areata pathogenesis and reports no new research findings.

This study presents case reports of four patients with alopecia areata or alopecia universalis, highlighting varied responses to treatments like prednisone, intralesional triamcinolone, and squaric acid dibutyl ester.

This study found that T-regulatory cells, specifically the FOXP3 CD39 subset, were significantly reduced in both circulation and hair follicles of alopecia areata patients compared to healthy subjects, suggesting potential therapeutic targets.

This study identified specific markers that can distinguish between stem cells in different regions of human scalp hair follicles, offering potential strategies for cell sorting and purification based on these markers.

In this study using genetic mouse models, researchers discovered that senescent melanocytes in nevi secrete osteopontin, which activates hair stem cells, enhancing hair growth; this process is mirrored in human hairy nevi, suggesting a potential therapeutic target for regenerative disorders.

In this study, single-cell sequencing revealed clonal expansions of CD4+ and CD8+ T cells in murine and human alopecia areata, supporting the development of predictive models for human disease.

This study provides evidence that human sweat gland myoepithelial cells contain stem cells capable of self-renewal and differentiating into sweat gland luminal cells.

In this study, treating refractory alopecia universalis with low-dose cyclosporine A and prednisolone improved symptoms, with no recurring alopecia six months post-treatment and enhancements in immunologic function.

Developing human skin has immune cells with memory-like features.

This study describes a new mouse model for vitiligo that mimics key clinical features such as skin depigmentation and CD8 + T cell infiltration, providing a useful tool for in-depth research and drug discovery.

This review explores the role of regulatory T cells in autoimmune skin disorders like alopecia areata and vitiligo, emphasizing unanswered questions and reporting no new experimental results.

This review discusses the role of natural killer cells in the pathogenesis of blistering diseases and proposes further research on their interaction with the skin, reporting no new clinical results.

In this study using a mouse model and human data, researchers found that CD8+ T cells are central to driving alopecia areata, while regulatory T cells offer some protection, highlighting CD8+ T cells as key targets for future therapy development.

This study found that KLF4 expression in mouse hair follicle stem cells is important for effective cutaneous wound healing, with its knockdown leading to reduced stem cell populations and delayed healing.

This study found that alopecia in captive Rhesus macaques may be linked to chronic hypersensitivity dermatitis with CD4+ cell inflammation, possibly influenced by altered housing and reduced pathogen exposure.

This study found a significant reduction in Treg cell frequency in alopecia areata compared to other autoimmune and non-autoimmune skin diseases using immunohistochemical staining.

This study suggests that statins may help treat acute alopecia areata, with animal experiments showing increased regulatory T cell populations after statin treatment in mice with the condition.

This review discusses how recent studies use models and experiments to understand immune system signaling, but it reports no new clinical findings; the authors suggest strategies for improving these models.

This study reported that applying a cream with 5% vitamin C reduced dermatoporosis-related purpura, suggesting the condition may be linked to vitamin C deficiency.

This study found that IFN-γ plays a critical role in T cell activation and the pathogenesis of alopecia areata in C3H/HeJ mice.

This study suggests that long-term treatment with the contact sensitizer SADBE in mice may reduce leucocyte traffic in alopecia areata through impaired leucocyte extravasation.

This study suggests that cyclosporine may directly affect epithelial cell growth, potentially leading to broader use of its nonimmunosuppressive analogues in treating hyperproliferative epidermal diseases.

This study found that mechlorethamine restored hair growth in mice with alopecia-areata-like disease by eliminating infiltrated lymphocytes and inhibiting certain pro-inflammatory cytokines in treated skin areas.

This study characterized human Wharton's Jelly Mesenchymal Stem Cells (hWJ-MSCs) isolated from umbilical cords using explant and enzymatic methods, finding both methods yielded high-purity cells capable of differentiating into adipocyte, chondrocyte, and osteocyte lineages, showing promise for regenerative medicine applications.

This study found that Th17 lymphocytes may play a more crucial role than cytotoxic T cells in the development of alopecia areata due to their infiltration around the hair bulb/bulge, which exacerbates hair loss as histopathological grade worsens.

This study found that selectively targeting HDAC4 and HDAC7 in mice can reduce Th17 cell-mediated intestinal inflammation, suggesting a potential treatment approach for Th17-related inflammatory diseases like ulcerative colitis.