506 citations,
March 2005 in “The Journal of Clinical Endocrinology and Metabolism” Testosterone therapy improves physical function, strength, and body composition in older men with low testosterone levels.
155 citations,
May 2016 in “Nature communications” Memory T cells in the skin balance staying put and moving into the blood, clustering around hair follicles, and increasing in number after infection.
83 citations,
June 2018 in “Frontiers in immunology” Certain types of T cells are essential for healthy skin and play a role in skin diseases, but more research is needed to improve treatments.
69 citations,
February 2008 in “The American journal of pathology” Controlled delivery of specific RNA and IL-4 restored hair growth in mice with autoimmune alopecia.
66 citations,
March 2018 in “British journal of dermatology/British journal of dermatology, Supplement” An imbalance between certain immune cells is linked to a chronic skin condition and may be influenced by obesity, smoking, and autoimmune issues.
62 citations,
June 2015 in “The Journal of Dermatology” People with alopecia areata have more Th17 cells and fewer Treg cells, which may be key to the condition's development.
53 citations,
August 2019 in “American journal of human genetics” FOXN1 gene variants cause low T cells and immune issues from birth.
53 citations,
September 2013 in “Journal of Investigative Dermatology” Hair follicle cells help protect against immune attacks by regulating T-cell activity.
46 citations,
October 2018 in “JCI insight” CD8+ T cells are involved in alopecia areata and may cause disease relapse.
34 citations,
July 2020 in “Frontiers in immunology” Androgens may influence T cells, contributing to higher autoimmune liver disease risk in women.
34 citations,
June 2020 in “British journal of dermatology/British journal of dermatology, Supplement” Frontal fibrosing alopecia is linked to increased immune system activity and reduced stem cells, suggesting early treatment targeting this pathway might prevent hair follicle damage.
34 citations,
November 2010 in “Development” Activating Notch in adult skin causes T cells and neural crest cells to gather, leading to skin issues.
30 citations,
July 2019 in “PloS one” Patients with Alopecia areata have fewer specific immune cells that normally regulate the immune system, which may contribute to the condition.
27 citations,
September 1992 in “The Lancet” ICL is a condition with low CD4+ T cells like AIDS but not caused by HIV, and normal CD4+ T cell counts may vary between men and women.
25 citations,
February 2012 in “The Journal of Allergy and Clinical Immunology” Finasteride caused a rare skin rash in a man, which improved after stopping the medication.
24 citations,
January 2012 in “Indian Journal of Dermatology, Venereology and Leprology” Diffuse alopecia areata involves more inflammation and higher allergy-related antibodies than patchy types.
22 citations,
September 2020 in “The journal of investigative dermatology/Journal of investigative dermatology” The study's results on the effectiveness of low-dose IL-2 for alopecia areata and its impact on immune cells were not provided.
21 citations,
December 2005 in “The journal of investigative dermatology/Journal of investigative dermatology” T-cells in alopecia areata scalp show abnormal regulation, leading to less inflammation.
19 citations,
February 2016 in “Journal of The American Academy of Dermatology” CD3+ T-cell presence is a reliable marker to tell apart alopecia areata from pattern hair loss.
19 citations,
March 1997 in “Journal of Cutaneous Pathology” Alopecia areata involves specific T-cells, unlike androgenetic alopecia.
18 citations,
November 2016 in “Transgenic research” Overexpressing Tβ4 in cashmere goats improves hair fiber traits and increases cashmere yield.
17 citations,
January 2019 in “International journal of biological sciences” Researchers used CRISPR/Cas9 to create a goat with a gene that increased cashmere production by 74.5% without affecting quality.
16 citations,
December 2019 in “Animals” Overexpressing Tβ4 in goats' hair follicles increases cashmere production and hair follicle growth.
16 citations,
October 2014 in “Cell death and disease” FoxN1 overexpression in young mice harms immune cell and skin development.
14 citations,
June 2017 in “Immunity” Special immune cells called Treg cells are important for maintaining and regenerating hair by activating a specific growth signal in hair stem cells.
14 citations,
January 2016 in “Experimental and molecular pathology” Giving immune serum from vaccinated mice to mice without T cells prevents infection and tumor growth.
13 citations,
September 2022 in “Frontiers in immunology” Ifidancitinib, a JAK inhibitor, effectively regrows hair in mice with alopecia by tiring out harmful T cells.
9 citations,
December 2020 in “Journal of The American Academy of Dermatology” Platelet-rich plasma may help restore immune balance in bald patches, but its effectiveness in treating hair loss is limited.
9 citations,
November 2020 in “Medical Hypotheses” Hair loss may link to weaker COVID-19 immunity, suggesting possible need for extra vaccine boost.
8 citations,
October 2016 in “Experimental dermatology” Hair follicles may help teach the immune system to tolerate new self-antigens, but this can sometimes cause hair loss.