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In this study, nearly 5% of anti-TNF-treated patients with IBD developed psoriasiform skin lesions, with smoking identified as a main risk factor, and ustekinumab proved highly effective in severe cases.

This study found that dysregulation of systemic Th1, Th2, and Th17 cytokines is associated with alopecia areata, with specific cytokines linked to disease activity and treatment response.

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.

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.

In this case study, the progression of alopecia universalis in a Japanese man was linked to the involvement of Th1 and Th17 cells, suggesting an autoimmune mechanism.

This study found that patients with alopecia areata and their healthy family members had elevated levels of Th1- and Th17-related cytokines, suggesting a genetic link in cytokine dysregulation.

In this study, researchers found that using a 5-α reductase inhibitor may reduce inflammation-related cytokines associated with T-helper cell 1 and T-helper cell 2 in prostate tissues after surgery, but it did not affect those related to Th17 cells.

This study evaluated interleukin-26's antimicrobial activity in Hidradenitis Suppurativa and explored its potential role in chronic skin inflammation.

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 study characterized two siblings with hereditary vitamin D resistant rickets and a mutation in the vitamin D receptor, finding no immune-related disorders despite a defective T cell response to vitamin D.

This study found that administering gingerol improved survival and reduced organ damage in mouse models of chronic graft-versus-host disease by modulating T cell differentiation and inflammatory cytokines, suggesting a novel therapeutic approach for steroid-refractory cases.

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.

This study identified a distinct cytokine activation signature in alopecia areata, involving TH2, TH1, IL-23, and IL-9/TH9 pathways, suggesting potential targeting strategies similar to those in psoriasis and atopic dermatitis.

This study summarizes how the IL-23/IL-17 axis contributes to inflammatory skin diseases like psoriasis and highlights that biologics targeting this pathway, including monoclonal antibodies against IL-23 and IL-17, have shown efficacy in clinical trials for these conditions.

This article offers a viewpoint on hidradenitis suppurativa pathogenesis, suggesting that impaired Notch signalling from γ-secretase mutations may drive inflammation and link the condition to other Th17-driven diseases.

This article reviews the role of perifollicular regulatory T cells in maintaining hair follicle integrity in the context of hidradenitis suppurativa and calls attention to inflammatory mechanisms without reporting new clinical results.

This study found that patients with alopecia areata had higher levels of Th17 cells and lower levels of regulatory T cells compared to healthy controls, suggesting an immune imbalance in these patients.

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 review discusses the genetic, autoinflammatory, and keratinization factors involved in hidradenitis suppurativa and presents the concept of classifying it as an autoinflammatory keratinization disease, but reports no new clinical results.

This study found that EGFR-targeted cancer therapy can cause skin toxicities by disrupting epidermal signaling, allowing microbiota invasion and inflammation, but identified a potential treatment approach using FGF7 or SOS expression to restore barrier integrity.

This review discusses potential immune therapies targeting regulatory T cells for age-related diseases and emphasizes the need for further research to translate these therapies into clinical practice.

This study suggests that targeting specific immune pathways, such as IL-12/23 and Th2 cytokines, may offer new treatment options for alopecia areata, a T-cell-mediated disease without current mechanism-specific therapies.

This report describes two cases where patients developed alopecia while undergoing treatment for psoriasis with IL-17 inhibitors, suggesting an unexpected paradoxical reaction.

This study observed significant differences in immune cell infiltration and gene expression across different skin sites, with the back displaying higher tolerance-promoting immune mechanisms, which may enhance epicutaneous immunotherapy outcomes.

This review discusses common skin eruptions caused by biologics in treating inflammatory bowel disease and proposes tailored therapeutic approaches for managing these adverse reactions.

This study observed that Epigallocatechin-3-gallate (EGCG) can inhibit phosphorylation of STAT1 and reduce a specific subset of immune cells in vitro and ex vivo, suggesting a potential role in maintaining immune privilege in alopecia areata.

This study found that intracellular Toll-like receptors were significantly up-regulated in peripheral blood mononuclear cells of alopecia areata patients, suggesting a potential role in inflammatory signaling and pathogenesis.

This review discusses the evolution of alopecia areata treatments towards more targeted therapies and reports no new clinical results, emphasizing cooperation between clinicians and scientists in understanding the disease's pathophysiology.

This case report describes a patient with Crohn's disease developing alopecia and psoriasiform skin lesions while on adalimumab treatment.