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In this study, researchers observed significantly higher CD8+ T cell levels in Iraqi patients with Alopecia areata compared to healthy controls, alongside concluding that the condition is more prevalent in men.

This study found that pro-inflammatory cytokines and apoptotic mechanisms, specifically involving granzyme B and Fas pathways, are associated with chronic alopecia areata, indicating their potential role in the disease's persistence.

This research explored the roles of various T cell types in chronic alopecia areata, finding that increased severity of lesions and hair loss may be linked to decreased lesional Foxp3+ Tregs, with a notable role for IL-17 and Th17 lymphocytes in the pathological process.

This case study suggests that autoimmunity involving cytotoxic CD8+ T cells may link alopecia areata and human T-cell lymphotropic virus-1-associated myelopathy in adult T-cell leukemia/lymphoma patients.

This study found that JAK inhibitors promote hair regrowth in both mice and human alopecia areata cases by blocking key immune pathways involved in disease development.

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.

People with acne have more CD4+ immune cells in their skin than healthy people.

In this study, researchers observed that follicular damage and stem cell loss in frontal fibrosing alopecia may be mediated by immune attacks at the bulge region, suggesting potential for JAK/STAT-targeting treatments to prevent progression.

This study found that chronic UVR exposure in mice and humans leads to a permanent loss of papillary fibroblasts in the upper dermis, which is associated with changes in the extracellular matrix.

This study suggests that IL-17 may play a more significant role than IFN-γ in the pathogenesis of chronic alopecia areata, with increasing severity linked to Th17 lymphocytes and cytotoxic T lymphocyte infiltration.

In this study using the C3H/HeJ mouse model of alopecia areata, researchers found that hyperexpanded CD8⁺ T cell clones were sufficient to initiate disease, establishing a causal link between T cell clonality and pathogenicity.

This review identifies shared interferon gamma-driven immune pathways in vitiligo and alopecia areata, revealing potential targets for new treatments, but reports no clinical results.

This manuscript reviews the latest understanding of alopecia areata's pathogenesis, highlighting the roles of genetic, immunological, and environmental factors, with a focus on immune responses involving IFN-γ and cytotoxic CD8+ T-cells as key contributors to hair follicle inflammation and function disruption without follicle destruction.

This review outlines the proposed theories behind the development of alopecia areata, emphasizing the autoimmune process involving lost immune privilege in hair follicles, and stresses the need to pinpoint specific pathogenic mechanisms for potential treatments.

This review explores the shared pathogenesis of alopecia areata and vitiligo and compares treatment responses, noting that hair regrowth in alopecia areata occurs more rapidly than skin re-pigmentation in vitiligo, possibly due to differences in stem cell biology and treatment effects on melanocytes.

Ritlecitinib effectively treats severe Alopecia Areata by reducing harmful immune activity in the skin.

This review discusses progress in targeted therapies for vitiligo, focusing on Janus kinase inhibitors and the potential of mesenchymal stem cells, but reports no new clinical results.

This review discusses various potential treatments for alopecia areata, highlighting the promise of Janus kinase inhibitors but reports no new clinical results.

This review discusses the pathophysiology of alopecia areata, highlighting the role of CD8 cytotoxic T cells and the upregulation of JAK signaling pathways; it reports no new experimental results.

This review discusses recent advancements in targeted therapies for vitiligo, including JAK inhibitors and mesenchymal stem cells, and highlights the need for further research.

This case study reports a rare co-occurrence of alopecia areata and vitiligo in a 13-year-old female, suggesting a potential pathogenic link between the two autoimmune skin diseases.

This review discusses recent advancements in targeted therapies for vitiligo, highlighting the therapeutic potential of JAK inhibitors and mesenchymal stem cell-derived extracellular vesicles, and reports no new clinical results.

This paper discusses two preclinical models for studying alopecia areata and finds that testing new therapeutic agents should involve both the C3H/HeJ mouse model and the humanized mouse model for comprehensive insights.

This study suggests that CD8+ cytotoxic T lymphocytes play a crucial role in the development of alopecia areata, based on observations in rodent models that mimic human autoimmune disease.

This article hypothesizes that thymoma with aplastic anemia may result from abnormal autoimmune CD8⁺ T lymphocytes produced by the thymoma, potentially leading to other cytotoxic T-cell-mediated autoimmune diseases.

This review discusses the immune-mediated mechanism behind alopecia areata, highlighting similarities between the condition in humans and animals, and reports no new clinical results.

This study observed that expanding regulatory T cells in the skin of mice with alopecia areata did not reverse the condition, indicating that additional immunotherapy may be necessary.

A man was diagnosed with a rare form of lupus after showing unique skin symptoms that responded well to treatment.

This study found significantly higher levels of the protein ULBP3 in patients with alopecia areata incognita compared to other hair loss conditions and healthy controls, suggesting ULBP3's potential as a diagnostic marker for AAI.

This study observed that in human scalp hair follicles, BTNL2 expression is lower in stressed conditions, which correlates with increased cytotoxic activity by gamma/delta and CD8+ T cells, suggesting a possible role for BTNL2 in controlling immune responses relevant to alopecia areata.