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Brepocitinib reduces interferon signaling in hidradenitis suppurativa patients.

Alopecia areata severity is linked to increased TH1 and TH2 activity.

In this study, IFN-γ-stimulated iPSC-derived mesenchymal stem cell extracellular vesicles improved atopic dermatitis in mice by reducing Th2 cytokine activity, suppressing inflammation, and restoring skin barrier function, as evidenced by decreased itching and inflammatory markers.

This review discusses recent advances in understanding alopecia areata's disease mechanisms and highlights JAK molecules as promising therapeutic targets, but reports no new clinical results; controlled trials are needed.

This study found that valproic acid may interfere with the leucine metabolic pathway by inhibiting 3-methylcrotonyl-CoA carboxylase and biotinidase, which could contribute to side effects like skin rash and hair loss in patients.

In this study, researchers found that crude extracts from Avicennia marina and its component avicequinone C inhibit mechanisms contributing to androgenic alopecia in vitro, including 5α-reductase activity and DHT-AR interactions, potentially promoting hair growth and delaying the catagen phase in human dermal papilla cells.

This study found that mycophenolate may stabilize β-catenin and counteract interferon-γ-induced catagen changes in human dermal papilla cells, which could promote hair growth.

This study identified at least four distinct fibroblast populations in adult human skin, each with unique functional properties, suggesting potential therapeutic applications for wound healing and fibrosis-related diseases.

This study observed that baricitinib treatment led to significant improvement in a patient's alopecia areata symptoms and suggests further clinical trials to explore its potential as a treatment.

This article hypothesizes that apremilast, a phosphodiesterase 4 inhibitor, could be a targeted treatment for alopecia areata due to its ability to suppress interferon-gamma production, but reports no new clinical results.

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.

In this review, researchers found that TNF-α, IL-17, and JAK inhibitors show the most promise for stabilizing and resolving scarring alopecias, with IL-23 and Interferon Alpha Receptor 1 inhibitors also providing some benefits in managing these hair loss conditions.

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 review discusses the current understanding of frontal fibrosing alopecia's pathogenesis, highlighting genetic susceptibility, immune response involvement, and possible links to steroid hormones, but reports no new clinical results.

This report presents a case where multiple steatocystomas appeared in a psoriatic patient during ustekinumab treatment, suggesting the drug may unmask a genetic predisposition to steatocystoma multiplex.

The study suggests that immune privilege collapse in bulge cells and the involvement of pro-inflammatory cytokine interferon-γ contribute to hair follicle stem cell loss in lichen planopilaris.

This study identified shared gene expression changes and immune cell infiltration patterns that may contribute to hair loss in alopecia areata and cutaneous lupus erythematosus, but also highlighted factors that might preserve hair in psoriasis patients.

This study in a murine model of alopecia areata found that IFNg is crucial while perforin is not necessary for CD8 T cell-mediated disease development.

Monocyte-derived dendritic cells play a key role in UVB-induced skin sensitivity and inflammation.

This study found that in a human skin organ culture model of pemphigus vulgaris, split formation led to significant upregulation of IFNγ and TNFα-related genes, indicating secondary effects from mechanical stress, not direct changes from autoantibodies.

Highly active but fewer CD14+CD16- monocytes are found in Alopecia Areata patients, regardless of severity.

This research developed new in vitro models for high-throughput screening of drugs that could protect or restore immune privilege in hair follicles, finding that Tofacitinib was effective in preventing inflammation-related marker upregulation, while Tacrolimus and αMSH worked specifically in outer root sheath keratinocytes.

This study observed that Wnt5a mRNA expression in mice correlates with the hair cycle and inhibits hair follicle growth by antagonizing the Wnts pathway.

This study found that IL-17 expression was significantly higher in perifollicular fibrosis of active Lichen planopilaris lesions, suggesting that targeting IL-17 could impact the disease's progression.

In this study, the PLP2 gene was found to promote secondary hair follicle development in Liaoning cashmere goats, with its expression negatively regulated by melatonin and potentially affecting follicle development via the BMP pathway.

This case report describes a girl with uncombable hair syndrome who showed significant improvement in hair combability and growth rate after two cycles of oral biotin supplementation.

This study found that finasteride reduced opioid self-administration in zebrafish and rats without affecting pain relief, suggesting steroidogenic pathways may offer new treatment avenues for opioid use disorder.

This review discusses the JAK-STAT pathway and the use of FDA-approved JAK inhibitors for autoimmune and inflammatory diseases but reports no new research findings.

This review examines the mechanisms of Janus kinase inhibitors in treating alopecia areata and evaluates their efficacy and safety, but reports no new clinical results.

TGF-β1 increases androgen receptor activity in hair loss, but Hic-5/ARA55 can counter this effect.