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This study found that human follicular papilla cells in the scalp produce leptin and express functional leptin receptors, suggesting leptin's significant role in hair biology.

In this study, researchers found that substance P triggered premature catagen development and immune changes in human scalp hair follicles, providing a possible biological link between stress and hair loss conditions like telogen effluvium and alopecia areata.

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 review discusses rodent models of alopecia areata and highlights genetic and epigenetic factors influencing its development, but reports no new experimental results.

Anti-PD-L1 immunotherapy can cause hair loss and unexpected hair color change, but treatment can restore hair growth and color.

This study found that patients with alopecia areata had significantly lower frequencies of IL-10 producing CD19+CD24hiCD38hi regulatory B cells compared to healthy volunteers, suggesting a potential role for these cells in the autoimmune response seen in the condition.

In this study, researchers observed that dysregulated innate lymphoid cells type 1, alongside CD8+ T cells, may contribute to the pathogenesis of alopecia areata by affecting hair follicle health.

Recent discoveries have improved our understanding of hair loss, but challenges in treatment and knowledge among specialists still exist.

This article discusses the role of neurohormones and neuropeptides in hair follicle pigmentation and outlines promising neuroendocrinological strategies to address greying and damage, but reports no new clinical results.

This article reviews recent findings on alopecia areata, highlighting genetic and immune factors in its pathogenesis but reporting no new clinical results; the authors emphasize the need for quality evidence on treatment efficacy.

This study suggests that SOCS3 treatment may effectively inhibit alopecia areata by suppressing CD8+ T cell activity and IFN-γ production.

This article reports a case of rapidly progressive alopecia areata totalis in a COVID-19 patient that did not respond to treatment with tofacitinib; no new clinical results are discussed.

This review discusses the complex role of immune disturbances and the JAK-STAT pathway in alopecia areata, noting the success of JAK inhibitors in treatment, while highlighting ongoing debates and challenges in targeting other pathways like IL-17 and TNF-α.

In vivo using the C3H mouse model, this study observed that BST2 expression occurs before hair loss in alopecia areata and is followed by an increase in epidermal γδ T cell numbers.

This review discusses various factors influencing alopecia areata and explores newer therapeutic options like biologics and regenerative techniques, but it reports no new clinical trial results.

This review article discusses recent advances in stem cell-based therapies for Alopecia Areata, noting preliminary clinical trials show significant hair regrowth, but emphasizes the need for thorough evaluation of long-term safety and efficacy.

This article discusses the role of regulatory T cells in alopecia areata, where their deficiency in hair follicles may lead to impaired local immunity and suggests potential therapies like CAR-T reg cells and low-dose IL-2 to alleviate autoimmunity and promote hair regeneration in affected individuals.

This case report discusses a new onset of alopecia areata following reinfection with COVID-19, suggesting a potential link between COVID-19 infection and this hair loss condition.

This study found that innate lymphoid cells-type 1 (ILC1) can induce alopecia areata by disrupting hair follicle immune privilege without the involvement of classical CD8+ T cells.

This study found that innate lymphoid cells-type 1 (ILC1lc) can induce alopecia areata (AA) by disrupting hair follicle immune privilege and causing hair follicle dystrophy and regression in both ex vivo and in vivo settings.

This study found significant upregulation of IDO-1 and IDO-2 in human basal cell carcinomas, suggesting that IDO production may confer immune privilege characteristics to the tumors, potentially impacting their growth.

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 mathematical model of alopecia areata illustrates how inflammatory autoimmune responses interrupt the anagen phase of hair growth, and may help evaluate treatments and identify new therapeutic targets.

This study found that the nail immune system is similar to the hair follicle immune system, with both showing a relative "immune privilege" that may protect against autoimmunity.

This study introduces stem cell activity as a key factor influencing the effects of IFN-γ and TGF-β1 on autoimmune disease dynamics, showing that varying cytokine levels can modulate stem cell activity and immune privilege, impacting tissue regeneration and disease flares.

This study explored the diversity of melanocyte stem cell subpopulations in the hair follicles of adult female mice and identified novel groups with distinct immune privilege regulation, suggesting a heterogeneous landscape that future research should consider.

This review explores the emerging roles of NK cells in various diseases, including allergies and skin conditions, and reports no new clinical results while indicating NK cell involvement in immune processes.

This study used a mouse model to enhance understanding of alopecia pathogenesis and suggested a therapeutic strategy for managing inflammation in EGFR-inhibitor therapy-induced folliculitis and cicatricial alopecia.

This study suggests that adult hair follicle stem cells can survive and potentially differentiate into neuronal cells after being transplanted in a mouse model of traumatic brain injury, indicating promise for TBI therapy.

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.