November 2025 in “Frontiers in Immunology” This review discusses the role of immune cells in the pathogenesis of alopecia areata and highlights emerging immunomodulatory strategies and novel therapeutic targets aimed at offering more effective and durable treatments for this autoimmune hair loss disorder.
39 citations
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April 2019 in “The journal of immunology/The Journal of immunology” This study found that Malt1, particularly its protease activity, plays a crucial role in maintaining Treg cell function and homeostasis, with its inactivation leading to autoimmune diseases and altered immune responses in mice.
60 citations
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September 2015 in “Expert Review of Clinical Immunology” 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.
74 citations
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May 2016 in “Current opinion in pediatrics, with evaluated MEDLINE/Current opinion in pediatrics” 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.
46 citations
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October 2018 in “JCI insight” In this study, the researchers found that treatment with the JAK inhibitor tofacitinib in alopecia areata patients may reduce clonal CD8+ T cell expansions but does not eliminate them entirely, which could contribute to disease relapse.
13 citations
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September 2022 in “Frontiers in immunology” This study found that Ifidancitinib, a JAK1/3 inhibitor, significantly promoted hair regrowth and reduced inflammation in a mouse model of alopecia areata by decreasing pathogenic T cell activity and inducing T cell exhaustion.
4 citations
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June 2025 in “Cell Reports” 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.
8 citations
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February 2015 in “Cellular immunology” This study found that deleting Snai2 and Snai3 genes in mice disrupts immune cell development, resulting in severe autoimmunity and early death due to the loss of immune tolerance.
October 2025 in “Cell Reports” This study found that regulatory T cells accumulate in hair follicle epithelium via the Cxcr4-Cxcl12 axis, partially influenced by glucocorticoid receptor signaling, promoting hair regeneration; similar mechanisms were observed in human and murine skin.
March 2021 in “Research Square (Research Square)” This study found that patients with RASopathies demonstrated lower levels of serum IgA and CD8 T cells compared to controls, potentially indicating an increased risk of developing autoimmune disorders.
59 citations
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June 2023 in “Nature Aging” This study observed that in aged mouse skin, there was an increase in IL-17-expressing T helper cells, γδ T cells, and innate lymphoid cells, and blocking IL-17 signaling reduced skin inflammation and delayed age-related changes, suggesting it as a potential target to mitigate skin aging.
3 citations
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March 2024 in “Viruses” This study found that γδ T cells in the skin contribute to wound healing after vaccinia virus infection by promoting cytokine and growth factor induction, without affecting virus replication control.
1 citations
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April 2019 in “The journal of investigative dermatology/Journal of investigative dermatology” This study found that anagen stage protein homogenates and specific epitopes from melanogenesis proteins activated CD8 T cells, suggesting alopecia areata is an anagen-specific disease.
April 2024 in “Frontiers in physiology” This review article examines recent studies on the role of diverse immune cells in forming an active niche for hair follicles, offering new insights into hair growth and related diseases.
21 citations
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January 2024 in “Science Immunology” This study developed a technique to limit genetic recombination to regulatory T cells to investigate whether self-tolerance is maintained in non-lymphoid tissues, an area previously not well understood.
August 2024 in “Cell Death and Disease” This study found that toll-like receptor 9 plays a previously unrecognized role in sensing skin injury and influencing tissue repair and regeneration in adult mice by modulating γδT cell migration.
5 citations
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June 2022 in “Frontiers in immunology” 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.
1 citations
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January 2025 in “Genes & Diseases” This review highlights that T cells are crucial in regulating hair follicle regeneration and their disruption can lead to alopecia, providing insights into hair disorders related to T cell immune balance and hair follicle regeneration.
May 2018 in “White Rose eTheses Online (University of Leeds, The University of Sheffield, University of York)” In this study, researchers found that alopecia areata patients show a significant reduction in suppressive regulatory T-cells and an increase in inflammatory T-cell populations, suggesting an immunological imbalance contributing to the disease.
31 citations
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February 2014 in “Inflammation Research” This study found that reduced expression of CD200R1 on monocyte-derived macrophages in rheumatoid arthritis patients was significantly associated with higher disease severity and an imbalance in Th17/Treg cells.
23 citations
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April 2021 in “Journal of Clinical Medicine” This review compiles existing data on frontal fibrosing alopecia and highlights the promise of 5-alpha reductase inhibitors as a treatment option, while noting the need for clarity on its cause and progression.
23 citations
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January 2016 in “Frontiers in immunology” This review discusses the potential of combining low-dose IL-2 with islet antigens to enhance antigen-specific Treg function in type 1 diabetes, but reports no new clinical results.
421 citations
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April 2012 in “The New England Journal of Medicine” Alopecia Areata is an autoimmune condition causing hair loss with no cure and treatments that often don't work well.
306 citations
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April 2019 in “International Journal of Molecular Sciences” This review discusses the protective roles of skin-resident immune cells in maintaining tissue homeostasis and facilitating wound healing, but reports no new experimental findings.
290 citations
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December 2017 in “Journal of The American Academy of Dermatology” This article reviews the epidemiology, clinical evaluation, and pathogenesis of alopecia areata and highlights recent advancements, but it does not report new clinical findings.
5 citations
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January 2022 in “PloS one” This study found that lineage-restricted loss of p63 in murine thymic epithelial cells resulted in severe thymic hypoplasia and absence of hair follicles, indicating p63's critical role in thymic and hair follicle development.
1 citations
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January 2019 in “Springer eBooks” Hidradenitis Suppurativa is a chronic skin condition best treated early with surgery for better outcomes and less recurrence.
August 2019 in “International journal of dermatology and venereology” This review discusses the calcineurin/NFAT pathway's role in cutaneous squamous cell carcinoma, noting its involvement in tumor development, skin cell behavior, and the tumor microenvironment; it reports no new results.
In this study, researchers found that alopecia areata is linked to immune cell activation against hair follicle autoantigens and is associated with heart changes and cardiac marker alterations in humans and mice.
1 citations
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May 2025 in “The Journal of Dermatology” In this study, increased Treg cell activity indicated by IL-10 and IL-15 was identified as a feature of ADTA, distinguishing it from AA and potentially explaining ADTA's more favorable prognosis.