April 2023 in “Journal of Investigative Dermatology” CD8+ T cells attack hair follicle stem cells, causing scarring and hair loss.
July 2025 in “Cell & Bioscience” Specific immune cells and pathways contribute to hair follicle inflammation and hair loss, suggesting potential treatments for lichen planopilaris.
19 citations
,
May 2016 in “Matrix Biology” Deleting a specific protein in skin cells disrupts normal hair growth and development.
16 citations
,
August 1989 in “PubMed” Retinol and L-cystine improve diffuse hair loss without side effects.
128 citations
,
March 2006 in “American Journal of Pathology” Prolactin contributes to hair loss by promoting hair follicle shrinkage and cell death.
July 2024 in “Journal of Investigative Dermatology” Brepocitinib improves cicatricial alopecia and reduces key immune markers.
August 2025 in “Biomaterials” A new therapy using secretions from fetal cartilage cells shows promise for safe and effective hair regrowth.
67 citations
,
August 2007 in “American Journal of Pathology” Overexpressing the mineralocorticoid receptor in mouse skin causes skin thinning, early skin barrier development, eye issues, and hair loss.
April 2023 in “The journal of investigative dermatology/Journal of investigative dermatology” A PTH-based treatment improved hair regrowth better than ruxolitinib in a mouse model of hair loss.
April 2018 in “Journal of Investigative Dermatology” Aging reduces skin cell renewal and defense against germs due to TGFbeta, but blocking TGFbeta could help restore these functions.
January 2024 in “Archives of Dermatological Research” Different types of male pattern baldness have unique inflammation-related protein patterns.
14 citations
,
May 2022 in “Stem cell reports” The study created hair-bearing skin models that lack a key protein for skin layer attachment, limiting their use for certain skin disease research.
4 citations
,
November 2015 in “Journal of Investigative Dermatology” Testosterone may worsen hair loss by affecting hair growth signals, while different prostaglandins can either hinder or promote hair growth.
March 2021 in “bioRxiv (Cold Spring Harbor Laboratory)” Removing a specific gene in certain skin cells causes hair loss on the body by disrupting normal hair development.
14 citations
,
December 2020 in “Journal of Investigative Dermatology” Aging causes changes in the scalp that can affect hair growth and lead to older-looking hair in women.
Taking enzyme food and collagen together improves hair health in middle-aged women more than taking them separately.
April 2023 in “Journal of Investigative Dermatology” IL-24 contributes to skin aging by increasing collagen-degrading enzymes and decreasing collagen production when exposed to air pollution.
December 2022 in “Gastroenterology” A man with Cronkhite-Canada syndrome improved significantly with immunosuppressive therapy.
2 citations
,
July 1999 in “JEADV. Journal of the European Academy of Dermatology and Venereology/Journal of the European Academy of Dermatology and Venereology” Proteolytic enzymes damaged hair follicle stem cells in transgenic mice.
February 2026 in “Journal of Korea Society of Ingrielogy” PDO threads might help with hair loss, but more research is needed.
January 2026 in “Veterinary Sciences” Skin maturation in Dezhou donkey foals involves better barrier function, hair growth, and less collagen production.
73 citations
,
May 2009 in “Proceedings of the National Academy of Sciences” Disrupting the Sox21 gene in mice causes hair loss and regrowth cycles.
12 citations
,
January 1995 in “British Journal of Plastic Surgery” 24 citations
,
December 2011 in “International Journal of Cancer” PTH-CBD agonists may help regrow hair after chemotherapy.
14 citations
,
July 2021 in “Bioscience Reports” Activating Tgr5 may help treat hair loss and bone loss.
November 2024 in “Biochemical and Biophysical Research Communications” Abnormal gene expression related to keratin causes hair loss in certain mice.
Skin ages and changes due to sun, wind, and aging, causing dryness, thinning, and hair loss.
9 citations
,
June 2016 in “Stem cells” Overexpression of sPLA2-IIA in mouse skin reduces hair stem cells and increases cell differentiation through JNK/c-Jun pathway activation.
October 2021 in “Experimental Dermatology” Certain genes and proteins may help diagnose and treat primary cicatricial alopecia.
April 2018 in “Journal of Investigative Dermatology” The research found that a specific skin cell type not only triggers hair growth but also controls hair color, and that aging can lead to hair loss and color changes.