March 2024 in “International journal of molecular sciences” In a mouse model study, transcutaneous auricular vagus nerve stimulation (taVNS) significantly reduced depigmentation in vitiligo, potentially through mechanisms that regulate oxidative stress and inflammation, indicating taVNS's promise as a therapeutic approach for this skin disorder.
March 2024 in “International Journal of Cosmetic Science” This study observed that dandruff-affected scalp skin has increased T-cell infiltration in the epidermis and a reduction in the hair follicle's physiological immune privilege, particularly in the suprabulbar outer root sheath area, indicating a distinct immune microenvironment compared to healthy scalp.
February 2024 in “Veterinary sciences” This study found that canine pemphigus foliaceus skin lesions exhibit a distinct immune signature, with upregulated pro-inflammatory and Th17-related genes, showing similarities to human pemphigus. Further research using advanced sequencing is needed to better understand the disease's pathogenesis.
February 2024 in “Skin research and technology” The researchers in this study identified molecular mechanisms involved in frontal fibrosis alopecia, highlighting immune response and fatty acid metabolism, and developed a four-gene diagnostic model showing high accuracy in distinguishing affected individuals from controls.
January 2024 in “Elsevier eBooks” The authors concluded that increasing regulatory T cells in patients with alopecia areata may improve hair follicle regeneration by reducing autoimmune responses, suggesting a potential new therapeutic approach since current treatments are often ineffective with high relapse rates.
January 2024 in “International journal of homoeopathic sciences” This abstract discusses alopecia areata, highlighting its complex autoimmune pathogenesis involving immune cells and signaling molecules, and underscores the importance of accurate diagnosis and tailored management strategies, noting the need for further research to improve treatments.
In this case report, a woman developed severe alopecia areata approximately one year after starting belimumab for systemic lupus erythematosus, with hair loss improving upon discontinuation of the drug, suggesting a possible connection between belimumab and immune-mediated hair loss.
December 2023 in “Journal of Investigative Dermatology” A specific type of immune cell plays a key role in causing alopecia areata and could be a target for treatment.
November 2023 in “The journal of investigative dermatology/Journal of investigative dermatology” In this study, researchers used a mouse model of alopecia areata to demonstrate that both ruxolitinib and baricitinib, oral JAK inhibitors, reduced hair loss, CD8+ cell infiltration, and expression of disease-related markers, with baricitinib showing greater effectiveness.
October 2023 in “bioRxiv (Cold Spring Harbor Laboratory)” This study demonstrated that disrupting EGFR signaling in mice leads to immune sensitivity compromising the hair follicle's protective environment, but JAK1/2 inhibition can restore this immune privilege and stimulate hair growth, suggesting a potential therapy for scarring hair loss diseases like cicatricial alopecia.
July 2023 in “The journal of investigative dermatology/Journal of investigative dermatology” This study by Refat et al. found that the level of CD8+ T cell infiltrates in vitiligo lesions before surgical treatment can predict the likelihood of successful repigmentation, suggesting a potential new method for identifying patients who may benefit the most from surgical interventions.
July 2023 in “Nature Immunology” CD8+ virtual memory T cells may cause hair loss in alopecia areata.
July 2023 in “The Egyptian Journal of Hospital Medicine ” 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.
June 2023 in “Research Square (Research Square)” 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.
May 2023 in “Surgical Case Reports” This case report describes a rare instance of thymoma associated with alopecia areata in a 60-year-old woman who had no signs of myasthenia gravis, highlighting the need for thoracic surgeons to consider alopecia in such cases due to its impact on quality of life.
April 2023 in “Journal of Investigative Dermatology” This study suggests that linalool, a common allergen in personal care products, may contribute to frontal fibrosing alopecia pathogenesis by triggering immune responses and depleting hair follicle stem cells, especially in sensitized individuals.
April 2023 in “Journal of Investigative Dermatology” In this study, a mouse model of scarring alopecia demonstrated significantly reduced CD200R expression in affected skin, which may contribute to immune attacks on hair follicles.
April 2023 in “The journal of investigative dermatology/Journal of investigative dermatology” This study analyzed blood samples from individuals with alopecia areata and found that NKG2D+ immune cells, particularly memory-like NK cells, may better correlate with disease activity compared to CD8+ cells, though significant variability among individuals complicates these findings.
April 2023 in “The journal of investigative dermatology/Journal of investigative dermatology” This study revealed distinct cellular and transcriptomic differences among various subtypes of cutaneous T-cell lymphoma, particularly highlighting characteristics unique to folliculotropic mycosis fungoides.
April 2023 in “The journal of investigative dermatology/Journal of investigative dermatology” This study reports that CD200R expression is significantly reduced in an experimental mouse model of scarring alopecia, suggesting a potential role for this pathway in immune regulation and hair follicle protection.
April 2023 in “The journal of investigative dermatology/Journal of investigative dermatology” This study shows that IKZF1 and the protein IKAROS may play a role in the development of alopecia areata, based on findings from both mouse models and human scalp tissues.
April 2023 in “IP Indian journal of clinical and experimental dermatology” This article reviews the pathogenesis, complications, and management of lichen planus, especially its persistent oral form, and highlights the need for further prospective studies.
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.
November 2022 in “Journal of Investigative Dermatology” This study observed that dandruff is linked to a weakened immunoprivilege in hair follicles, with reduced Langerhans cells and increased epidermal CD4+ and CD8+ T cell infiltration.
November 2022 in “The journal of investigative dermatology/Journal of investigative dermatology” This study suggests that allergens like linalool found in personal care products may contribute to the pathobiology of frontal fibrosing alopecia by affecting immune responses and stem cell function in hair follicles.
November 2022 in “The journal of investigative dermatology/Journal of investigative dermatology” This study found that Imaging Mass Cytometry effectively visualizes multiple biomarkers in alopecia areata, enhancing analysis of immune cell and tissue interactions in hair pathology.
November 2022 in “Journal of Investigative Dermatology” This study found that ILC1-like cells can induce alopecia areata in healthy human hair follicles, challenging the traditional belief that the disease is primarily driven by CD8+ T cells.
November 2022 in “Journal of Investigative Dermatology” This study found that innate lymphoid cells-type 1 can induce alopecia areata characteristics in human hair follicles both ex vivo and in vivo, challenging the view of it as solely an autoimmune disease driven by CD8+ T cells.
November 2022 in “Journal of Investigative Dermatology” This study provides evidence that ILC1-like cells can induce alopecia areata in previously healthy human hair follicles, challenging the view that it is solely an autoantigen-dependent autoimmune disease.
This study found that ILC1-like cells can induce alopecia areata symptoms in both ex vivo human hair follicles and in vivo mouse models, challenging the view that alopecia areata is solely CD8+ T cell-driven.