43 citations
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April 2010 in “Developmental Biology” Sebaceous glands can form new hair follicles when activated, but hair follicle bulges cannot.
34 citations
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June 2005 in “Developmental dynamics” Runx3 helps determine hair shape.
17 citations
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February 1987 in “Journal of the American Academy of Dermatology” The hair cuticle acts as a barrier against fungal infection, which occurs only deep within the hair follicle.
15 citations
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January 1988 Hair follicles have unique proteins that vary by species and are influenced by nutrition.
6 citations
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May 1987 in “Acta dermato-venereologica” Syphilis patients showed abnormal hair root changes, with no difference between primary and secondary stages.
October 2021 in “Dermatology practical & conceptual” A Saudi girl was diagnosed with Loose Anagen Hair Syndrome, a rare condition causing easy hair loss without scarring.
319 citations
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November 2005 in “Proceedings of the National Academy of Sciences” Hair follicle stem cells can help repair damaged nerves.
33 citations
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January 2006 in “Journal of Dermatological Science” A long-acting Vitamin C derivative helps hair grow by stimulating cells and increasing growth factors.
32 citations
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December 1969 in “The Lancet” Children with marasmus have more resting hair follicles and thinner, less pigmented hair, showing long-term malnutrition.
30 citations
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December 1999 in “Journal of Investigative Dermatology Symposium Proceedings” Steroids, particularly estrogens and 5α-reductase inhibitors, affect blood vessel-related hair growth processes in hair follicle cells.
28 citations
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March 1973 in “The Journal of Clinical Endocrinology & Metabolism” Altered DHEA metabolism in hair follicles may be linked to hair loss in balding men.
1 citations
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May 2002 in “Therapeutische Umschau” Children's hair diseases include compulsive hair-pulling, easily plucked hair, scalp fungal infections, and head lice, each requiring specific diagnosis and treatment.
29 citations
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July 2015 in “Journal of Medical Genetics” A genetic variant in the KRT25 gene causes tightly curled hair.
15 citations
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December 2014 in “PLoS ONE” A mutation in the iRhom2 gene causes hairless mice due to abnormal hair follicle development.
4 citations
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January 2011 in “Cell stem cell” Hair follicle stem cells can return to their original niche and help regenerate hair.
1 citations
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June 2024 in “Preprints.org” Dermal sheath cells play a key role in wound healing and could impact fibrosis.
Sodium fluoride can harm hair follicles, but sodium selenite can help protect them.
53 citations
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January 2009 in “Journal of Investigative Dermatology” UVB radiation harms hair growth and health, causing cell death and other changes in human hair follicles.
46 citations
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April 1971 in “American Journal of Clinical Nutrition” Lack of protein causes hair root damage, but it can be reversed by eating protein again.
45 citations
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December 2007 in “The FASEB journal” There are two types of stem cells in rodent hair follicles, each with different keratin proteins.
35 citations
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December 2008 in “PubMed” Trichilemmoma, BCC, and SCC tumors have different stem cell marker expressions.
18 citations
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January 2013 in “Veterinary Dermatology” K15 is a reliable marker for studying stem cells in dog hair follicle tumors.
October 2025 in “Journal of Investigative Dermatology” Hair follicle dermal stem cells help control hair growth timing by regulating signals at the hair germ–dermal papilla interface.
65 citations
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March 2017 in “Experimental Dermatology” Curly hair is influenced by specific genetic variations.
26 citations
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August 2007 in “Annals of Anatomy - Anatomischer Anzeiger” Feathers become harder as they develop due to a change in keratin type.
21 citations
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September 1968 in “Cancer” Citrulline in certain skin tumors suggests they mimic hair growth, helping distinguish them from other cancer types.
19 citations
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January 2019 in “Animals” PDGFA helps activate hair growth in cashmere goats.
November 2022 in “The journal of investigative dermatology/Journal of investigative dermatology” The research identified specific genes that are active in the cells crucial for hair growth.
A 15-year-old boy's smelly, yellow armpit hair improved with clindamycin treatment.
29 citations
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July 2008 in “Journal of Cutaneous Pathology” Hair root sheaths are more common in non-scarring hair loss and help diagnose the type of hair loss.