September 2001 in “Connective tissue” Type XII and XIV collagens help maintain hair follicle structure in bovine skin.
May 2023 in “bioRxiv (Cold Spring Harbor Laboratory)” Telocytes, cells with long extensions, are vital for hair growth because they produce Wnt signals, which are necessary for hair follicle regeneration.
March 2025 in “International Journal of Trichology” Injecting stem cells from a patient's own fat can improve hair growth in women with hair loss.
3 citations
,
February 2021 in “bioRxiv (Cold Spring Harbor Laboratory)” Adult esophageal cells can start to become like skin cells, with a key pathway influencing this change.
142 citations
,
September 2020 in “Journal of neurophysiology” Young adults have about 230,000 tactile nerve fibers, decreasing 5-8% per decade with age.
January 2023 in “Springer eBooks” Most older adults experience pattern hair loss due to shrinking hair follicles, with men and women showing different balding patterns.
43 citations
,
January 2012 in “Biological Research” The origins of many adult skin stem cells are still mostly unknown.
5 citations
,
January 2024 in “Science Advances” Touch dome keratinocytes in adult skin have traits of different skin cell types.
April 2017 in “Plastic and reconstructive surgery. Global open” Baby and adult skin cells are different, with baby cells having more active pathways that could help grow new hair follicles.
47 citations
,
April 1978 in “Journal of Cutaneous Pathology” Basal cell epithelioma resembles fetal hair follicles, not adult or fetal skin.
24 citations
,
September 1997 in “PubMed” Loose anagen hair can appear at any age and may improve over time.
5 citations
,
January 2019 in “Elsevier eBooks” Current therapies cannot fully regenerate adult skin without scars; more research is needed for scar-free healing.
July 2023 in “Veterinary pathology” White-tailed deer can get a hair loss condition that might make them more vulnerable to environmental threats.
September 2023 in “Çukurova medical journal (Online)/Çukurova medical journal” EZH2 levels decrease as fetuses develop and are higher in adult skin, which may affect skin growth and repair.
58 citations
,
June 2006 in “Plastic and Reconstructive Surgery” Mice healed without scars as fetuses but developed scars as adults, suggesting scarless healing might be replicated with further research.
10 citations
,
April 1995 in “Animal Science/Animal science” Melatonin implants can change the seasonal prolactin levels and hair growth in adult cashmere goats but not in juveniles, and don't delay spring moult for better fiber harvesting.
1 citations
,
June 2020 in “bioRxiv (Cold Spring Harbor Laboratory)” Fetal skin has unique immune cells different from adult skin.
September 2025 in “Cureus” GLP-1 receptor agonists may cause hair loss, but more research is needed.
April 2017 in “Plastic and reconstructive surgery. Global open” Fetal scalp cells have more regenerative genes than adult cells, and decellularized muscle matrix is better for muscle repair than commercial alternatives.
Rat skin develops from a single layer to adult-like skin with hair follicles by day 21.
7 citations
,
January 1992 in “Adolescent and pediatric gynecology” Early diagnosis and treatment of PCOS in teenagers can help prevent more severe adult PCOS.
June 2012 in “Expert Review of Dermatology” Japanese researchers created new hair follicles from human cells that grew hair when put into mice, and other findings showed a link between eye disease severity and corneal thickness, gene mutations affecting hearing and touch, and the safety of the shingles vaccine for adults over 50.
January 2012 in “Journal of Investigative Dermatology” Small molecule DMF improves psoriasis and multiple sclerosis, adult skin cells can be made to grow new hair, certain skin cells initiate hair growth, IL-17C controls gut health and can cause skin inflammation, and skin cells produce IL-17 that can lead to psoriasis.
16 citations
,
September 2022 in “Cold Spring Harbor Perspectives in Biology” Wound healing can potentially regrow hair and aid in hair loss treatments.
1 citations
,
November 2015 Silver nanoparticles might speed up wound healing and muscle repair by stimulating adult stem cells.
December 2014 in “TDX (Tesis Doctorals en Xarxa)” Cellular senescence is crucial for normal embryonic development but contributes to aging in adults.
13 citations
,
May 2005 in “Seminars in Plastic Surgery” Follicular Cell Implantation might become a new treatment for hair loss and could lead to advances in organ regeneration.
1 citations
,
September 2019 in “Journal of Investigative Dermatology” Human hair matrix cells and dermal papilla fibroblasts can form early hair follicle structures but don't produce hair shafts yet.
29 citations
,
July 2004 in “The journal of investigative dermatology/Journal of investigative dermatology” The enzymes Aldh1a2 and Aldh1a3 are involved in making retinoic acid in hair follicles and have different roles in hair growth.
15 citations
,
August 1991 in “Histochemistry and Cell Biology” Enhancing Factor is found in growing tissues like young mouse intestines and skin but not in adults.