January 2015 in “Turkiye Klinikleri Journal of Dermatology” Peripilar keratin casts are a helpful sign for diagnosing traction alopecia.
5 citations
,
January 2022 in “Scientific reports” The research identified two types of keratinocytes in chicken scales: one for hard scales and another for soft skin, with similarities to human skin differentiation.
11 citations
,
January 1977 in “Archives of dermatological research” Mouse tail skin has different keratinization near hair follicles and scales.
100 citations
,
December 2002 in “Journal of biological chemistry/The Journal of biological chemistry” Researchers mapped and categorized specific keratin-associated protein genes on human chromosome 21q22.1.
4 citations
,
August 2017 in “Cosmetics” The extract reduced sebum production and promoted hair growth.
1 citations
,
April 2016 in “Journal of Investigative Dermatology” Targeting specific T cells may help treat alopecia areata.
November 2022 in “Journal of Investigative Dermatology” Growth hormone-releasing hormone (GHRH) boosts hair growth and human scalp hair follicles have their own growth hormone system.
49 citations
,
April 2010 in “International Journal of Cosmetic Science” Hair ages as the cuticle wears down, especially beyond 1 meter from the root, affecting its strength and shine.
22 citations
,
January 2020 in “PeerJ” Keratin peptides in hair might help identify gender and ethnicity.
June 2025 in “Advances in Clinical and Experimental Medicine” Keratin biomaterials could help heal wounds and regenerate tissue, but more testing is needed.
June 2020 in “Journal of Investigative Dermatology” Scientists successfully grew mini hair follicles using human skin cells, which could help treat baldness.
14 citations
,
October 2020 in “Scientific reports” Hair greying is linked to reduced ATM protein in hair cells, which protects against stress and damage.
36 citations
,
July 1988 in “Archives of Dermatological Research” Pili annulati is caused by a protein metabolism disorder affecting hair structure.
July 2022 in “The journal of investigative dermatology/Journal of investigative dermatology” Blocking mTORC1 activity with rapamycin could help increase hair pigmentation and growth, potentially reversing gray hair.
April 2016 in “Journal of Investigative Dermatology” Autophagy, a cell recycling process, is crucial for prolonged hair growth and could be a potential target for treating hair growth disorders.
August 2021 in “Journal of Investigative Dermatology” Platelet-rich plasma (PRP) helps regrow hair in male pattern baldness.
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.
April 2023 in “Journal of Investigative Dermatology” IL-9/IL-9R signaling can negatively affect human hair growth and may be a target for treating hair loss conditions.
July 2022 in “Journal of Investigative Dermatology” IL-15 helps maintain hair growth and protects the immune status of hair follicles.
Some factors can either promote or inhibit hair growth.
2 citations
,
June 2001 in “Medical Electron Microscopy” Trichilemmal cysts may form from hair follicle outer root sheath growth.
June 2021 in “Research Square (Research Square)” Using fat-derived cells to treat hair loss increased hair density and thickness without side effects.
22 citations
,
June 2012 in “Journal of Investigative Dermatology” Adiponectin may stimulate hair growth and could be a potential treatment for promoting hair growth.
16 citations
,
November 2009 in “Experimental dermatology” Ionizing radiation damages human hair follicles by stopping cell growth, causing cell death, disrupting color, and increasing stress and damage markers.
9 citations
,
June 1959 in “Archives of dermatology” Hair can darken after inflammation and then return to its original color.
6 citations
,
August 2012 in “The Journal of Pediatrics” A 12-year-old girl was diagnosed with monilethrix, a genetic condition causing fragile, beaded hair that breaks easily, with no effective treatment available.
4 citations
,
January 2019 in “Micron” Fetal hair follicles have melanocytes with melanosomes at different stages, which are broken down into pigment particles in keratinocytes.
2 citations
,
January 2018 Diffuse alopecia areata causes widespread hair thinning due to an autoimmune response.
January 2025 in “Dermatology Online Journal” The man's hair loss and skin papules were diagnosed as atrichia with papular lesions, not alopecia areata universalis.
April 2018 in “Journal of Investigative Dermatology” Both Th1 and Th2 immune responses are increased in alopecia areata, with Th2 response more strongly linked to how severe the disease is.