90 citations
,
August 2004 in “Physiological Genomics” Dermal papilla cells help skin stem cells grow into hair.
The method effectively measures hair elasticity and could be useful in forensics.
April 2023 in “Journal of Investigative Dermatology” 3D ultrasound can detect hair follicle changes and disease phases in alopecia areata.
338 citations
,
July 2009 in “Development” Sox2-positive cells determine specific hair follicle types in mammals.
4 citations
,
April 2019 in “Cosmetics” Hair stiffness is higher when it has more para-like cortical cells.
4 citations
,
May 2006 in “médecine/sciences” The hairless gene is crucial for hair health, and its mutations cause hair loss.
April 2018 in “Journal of Investigative Dermatology” Hair follicle stem cells can change their role to ensure proper hair development.
3 citations
,
June 2013 in “Genes & development” CaV1.2 helps activate hair follicle stem cells without calcium flux.
31 citations
,
September 1996 in “Differentiation” The upper dermal sheath can regenerate hair in rats.
2 citations
,
September 2002 in “Dermatologic Surgery” Each group of hair follicles on the scalp shares one muscle that helps control hair movement.
115 citations
,
November 2008 in “Proceedings of the National Academy of Sciences” Reptiles have genes similar to hair proteins, suggesting hair's genetic origins predate mammals.
22 citations
,
January 1985 Water makes hair more flexible, especially the outer layer.
Hair feels different when touched and rubs together in various ways.
1 citations
,
March 2014 in “Journal of Innovative Optical Health Sciences” Hair structure worsens as tumors grow in mice.
February 2018 in “bioRxiv (Cold Spring Harbor Laboratory)” Rodent spiny hair traits are due to genetic factors other than the Edar gene.
April 2023 in “The journal of investigative dermatology/Journal of investigative dermatology” Developing hair follicles form from ring-shaped patterns, with future stem cells originating from the outer ring, not the upper layers, as previously thought.
Human hair affects millimeter radiowaves due to its keratin content.
15 citations
,
October 2004 in “Colloids and surfaces. B, Biointerfaces” Holes in mature hair are likely caused by the removal of substances during hair care.
Understanding hair follicle interactions can help treat male pattern baldness.
254 citations
,
January 2007 in “Chemical Society Reviews” Hair is a complex protein fiber with unique properties useful for developing hair products.
April 2015 in “Journal of Evolution of Medical and Dental Sciences” People with autoimmune skin diseases often have hearing problems and should get their hearing checked early.
165 citations
,
June 2007 in “European Journal of Cell Biology” Hair follicle stem cells are key for hair and skin regeneration, can be reprogrammed, and have potential therapeutic uses, but also carry a risk of cancer.
1 citations
,
June 1998 in “Journal of Forestry Research” Mammalian hair scales change from smooth to wavy due to friction.
December 2010 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” New cells join the hair's dermal papilla during the growth phase, possibly affecting hair thickness.
3 citations
,
August 2018 in “Zenodo (CERN European Organization for Nuclear Research)” Human hair follicles have a natural biomagnetic field.
50 citations
,
February 2013 in “BMC evolutionary biology” Cetaceans lost hair due to changes in the Hr and FGF5 genes.
10 citations
,
January 2002 in “Nihon Keshouhin Gijutsushakaishi/Journal of S C C./Nihon Keshouhin Gijutsushakai kaishi” The cuticle significantly contributes to hair stiffness, making up about 60% of the total bending stress.
23 citations
,
February 2019 in “International Journal of Molecular Sciences” Activin B can boost hair growth by promoting cell proliferation and cell cycle progression.
1 citations
,
September 2021 in “International journal of research - granthaalayah” Human hair has bipolar electrical charges because of a gap in the hair follicle's electromagnetic field.