August 2024 in “International Journal of Molecular Sciences” The study investigated immune cell patterns around the hair follicle infundibulum in androgenetic alopecia, revealing significant differences in immune signatures between patients with AGA and control donors, specifically noting an enrichment of CD4 cells in the patient group.
July 2024 in “International Journal of Molecular Sciences” Hemp seed biomaterials may reduce hair loss and improve hair growth.
July 2024 in “Clinical Cosmetic and Investigational Dermatology” Certain immune cells are linked to non-scarring hair loss, suggesting potential for immune-targeted treatments.
June 2024 in “Current Developments in Nutrition” This study found that a dietary intervention in dogs alleviated atopic dermatitis symptoms by modulating immune responses and skin microbiome composition compared to baseline, but with similar non-significant trends when compared with a positive control diet.
This study found that germinated hemp seeds extract and exosomes from their calli can prevent androgenetic alopecia by modulating genetic, cellular, and immune responses in hair follicle dermal papilla stem cells and CD8+ T cells, with exosomes being more effective.
May 2024 in “Deleted Journal” This study reports that chemotherapy-induced hair loss affects up to 65% of patients, typically within 1 to 3 weeks of treatment, while scalp cooling may help prevent severe hair loss with taxane-based therapies.
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.
April 2024 in “Vestnik dermatologii i venerologii” This review highlights the diagnostic potential and therapeutic prospects of exosomes, discussing their use in managing chronic immune-mediated skin conditions, alopecia, and wound healing through their capacity to deliver regulatory molecules between cells.
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.
March 2024 in “medRxiv (Cold Spring Harbor Laboratory)” This study found that faster algorithms for inferring ancestry in genomic data can better capture historical and functional insights into genome variation than traditional methods in large datasets like the UK Biobank.
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.
This study investigated how different 3D bioprinted scaffold structures affect immune responses and hair growth in mice, finding that moderate immune response induced by certain structures stimulates hair growth, while excessive immune response can hinder hair follicle development.
This study found that the succinate receptor, GPR91, plays a crucial role in the progression of androgenetic alopecia by affecting the immune system and hair follicle biology, and targeting it may offer new therapeutic strategies.
November 2023 in “The journal of investigative dermatology/Journal of investigative dermatology” This study found that in mice, hyper-activated JAK-STAT1 signaling due to EGFR inhibitor treatment leads to scarring alopecia, but JAK1/2 inhibition can restore hair follicle immune privilege and promote new hair growth.
November 2023 in “Journal of Investigative Dermatology” Removing GRK2 in skin cells causes hair loss similar to immune-related alopecia.
October 2023 in “Microorganisms” This study reported that COVID-19 patients treated with nirmatrelvir/ritonavir had lower anti-spike IgG levels and different cytokine patterns compared to those not receiving antiviral treatment, suggesting early antiviral use may alter immune response by reducing viral load and antigen presentation.
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.
October 2023 in “bioRxiv (Cold Spring Harbor Laboratory)” This study constructed a comprehensive atlas of prenatal human skin, revealing that innate immune cells, such as macrophages, play a crucial role in skin morphogenesis by interacting with non-immune cells, influencing hair follicle formation and angiogenesis beyond their traditional immune functions.
September 2023 in “Nature Communications” In this animal study, the researchers found that biodegradable extracellular matrix scaffolds accelerated wound healing and enhanced hair follicle neogenesis in mice, suggesting a role for immune systems in tissue regeneration.
September 2023 in “Medicine” This study found increased infiltration of specific immune cells, such as γδ T cells and CD8+ T cells, in the bald scalp of male androgenetic alopecia patients, and identified four key immune-related genes potentially involved in hair loss development through interferon-γ signaling pathways.
September 2023 in “Research Square (Research Square)” This study found that TNC + fibroblasts are crucial in neuro-immune interactions in various skin diseases, particularly inflammation and tumors, by engaging extensively with immune cells and overexpressing inflammatory genes, suggesting their significant role in skin abnormalities.
September 2023 in “Nature Biotechnology” This source reports that JAK inhibitors, commonly used in rheumatology, are being explored as new treatment options for autoimmune-driven hair loss, while new understanding of mechanisms is aiding research into androgenic alopecia.
August 2023 in “Research Square (Research Square)” In this study, researchers observed that Melan A, a melanocytic marker, was significantly expressed in hair follicles of alopecia areata patients and correlated with immune infiltrates, suggesting melanocytes might contribute to the autoimmune response in this condition.
This research observed that EGFR activity appears to maintain hair follicle quiescence and immune privilege, and its inhibition may lead to stem cell apoptosis and scarring alopecia during inflammation.
This study found that in an ex vivo model simulating alopecia areata, the DHODH inhibitor farudodstat reduced T-cell proliferation and MHC protein expression in hair follicles, suggesting it may protect against immune privilege collapse without cytotoxic effects.
April 2023 in “The journal of investigative dermatology/Journal of investigative dermatology” This study reported that in mouse models, deletion of EGFR resulted in stem cell hyper-proliferation followed by apoptosis, leading to scarring alopecia, and implicated EGFR's role in maintaining hair follicle quiescence and immune privilege during inflammation.
April 2023 in “The journal of investigative dermatology/Journal of investigative dermatology” This study found that deleting Ube2n in adult mouse skin leads to inflammation and other skin changes, and identifies IRAK1/4 as potential treatment targets for inflammatory skin disorders.
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 “Journal of Investigative Dermatology” 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.
April 2023 in “Journal of Investigative Dermatology” In ex vivo organ culture of human scalp hair follicles, this study found that IL-9 signaling inhibits hair growth, reduces progenitor cell generation, and disrupts immune privilege.