December 2001 in “中華皮膚科醫學雜誌” An 18-year-old boy had a harmless skin nodule near his nose with hair and oil glands inside.
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.
60 citations
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February 1997 in “Journal of Dermatological Science” Liposomes can safely and effectively deliver substances to mouse hair follicles, potentially useful for human hair treatments.
March 2020 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” The dermal sheath's contraction is crucial for hair follicle regression and stem cell relocation.
1 citations
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January 2004 in “Linchuang pifuke zazhi” Substance P helps hair growth by extending the growth phase and affecting certain growth factors.
January 2013 in “프로그램북(구 초록집)” January 2008 in “한국미용학회지” Certain enzymes and a growth factor were higher in mice treated with minoxidil or a peppermint and rosemary oil mix, which may be good indicators of hair growth.
8 citations
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February 1968 in “Australian Journal of Zoology” The southern elephant seal's skin layer helps waterproof the skin by being tightly connected to hair shafts.
July 1995 in “Journal of Dermatological Science”
417 citations
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September 2005 in “PLoS biology” Understanding gene expression in hair follicles can reveal insights into hair growth and disorders.
5 citations
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October 2013 in “Experimental Dermatology” The commentary explains that a balance of HR protein and putrescine is important for normal hair growth.
3 citations
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April 2012 in “Bioinformation” Two specific SNPs in the TRPS1 gene cause excessive hair growth by altering the protein's structure.
24 citations
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January 2018 in “Development” Frizzled 3 and Frizzled 6 together control the orientation of mouse hair follicles.
12 citations
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June 2013 in “International Journal of Dermatology” Seborrheic keratosis shows varied cell differentiation, and keratin analysis helps diagnose skin tumors.
September 2009 in “International Journal of Dermatology and Venereology” Dermal papilla cells play a key role in hair growth and health.
8 citations
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January 2017 in “Stem Cells International” A protein called sFRP4 from skin cells stops the development of pigment-producing cells in hair.
146 citations
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May 2002 in “The American journal of pathology” Cathepsin L is essential for normal hair growth and development.
29 citations
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April 1997 in “Developmental Dynamics” Trypsin slows hair growth and affects color by causing cell death in hair follicles.
January 2009 in “한방재활의학과학회지” Saengbal-eum-2 promotes hair growth and reduces inflammation in mice.
81 citations
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September 2009 in “Birth defects research” Different body areas in mice produce different hair types due to interactions between skin layers.
25 citations
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March 2014 in “Experimental Dermatology” Leptin helps start the growth phase of hair.
64 citations
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February 2008 in “Cancer Research” Inactivating both p53 and Rb genes in mice speeds up aggressive skin cancer development.
333 citations
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March 2000 in “Proceedings of the National Academy of Sciences” Overexpressing GLI-1 in mice skin can cause tumors like human basal cell carcinomas.
Hair growth is maintained by specific cell signals.
September 2025 in “SKINdeep” Sebaceous glands help protect and maintain healthy skin and hair.
109 citations
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November 2005 in “The journal of investigative dermatology. Symposium proceedings/The Journal of investigative dermatology symposium proceedings” Targeting hair follicles can improve skin treatments and reduce side effects.
380 citations
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March 2000 in “Proceedings of the National Academy of Sciences” Overexpressing GLI-1 in mice skin can cause tumors like human basal cell carcinomas.
April 2023 in “The journal of investigative dermatology/Journal of investigative dermatology” DKK2 and SOSTDC1 together are necessary for the normal timing of the first regression phase in the hair growth cycle.
45 citations
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September 2000 in “Archives of dermatology” The study found that the enzyme linked to acne is present in the same areas of both acne-affected and normal skin.
April 2018 in “Journal of Investigative Dermatology”