173 citations
,
July 1995 in “Biochemical and biophysical research communications” Male hormones promote hair cell growth by using a growth factor from nearby skin cells.
5 citations
,
May 2009 in “American Journal of Dermatopathology” A rare hair follicle tumor showed unusual high levels of mucin.
50 citations
,
September 2012 in “Developmental Biology” Sprouty and FGF balance is crucial for normal feather shape and size.
January 2015 in “Faculty of 1000 Research Ltd” Androgenetic alopecia may be irreversible due to the detachment of a muscle from hair follicles.
94 citations
,
October 1994 in “The Journal of Cell Biology” Too much keratin 16 in mice skin causes abnormal skin thickening and structure.
Vogt–Koyanagi–Harada disease can cause rare hair growth on normally hairless thumb skin.
October 2025 in “EMJ Dermatology” Histopathology is crucial for accurately diagnosing eruptive vellus hair cysts.
34 citations
,
August 1966 in “Experimental cell research” Keratin fibrils in hair form and stop growing at specific points in the follicle.
48 citations
,
April 1995 in “PubMed” Testosterone helps beard and axillary hair cells grow by releasing growth factors from dermal papilla cells.
Hair dysplasias involve various hair disorders causing fragility, breakage, and poor hair adhesion.
31 citations
,
February 2007 in “Molecular Carcinogenesis” Overexpressing ATF3 in mice's epithelial cells may lead to oral cancer.
135 citations
,
January 1996 in “Journal of Investigative Dermatology” March 2021 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” Fat tissue around hair follicles releases a growth factor that helps hair grow and develop color.
Genetic factors might cause fibrosing alopecia linked to hair shaft abnormalities.
April 2019 in “The journal of investigative dermatology/Journal of investigative dermatology” A specific mutation in the TRPV3 gene causes hair follicle cells to develop improperly, leading to hair loss.
13 citations
,
January 2012 in “International journal of trichology” The study found that hair fragility in Pili annulati may be caused by cavities and damage within the hair shafts.
3 citations
,
March 2017 in “Pediatric Dermatology” FOXN1 duplication can cause excessive hair growth.
48 citations
,
December 2004 in “Differentiation” Tooth papilla cells can help regenerate hair follicles and grow hair.
7 citations
,
January 2017 in “Sub-cellular biochemistry/Subcellular biochemistry”
9 citations
,
July 2008 in “Oncology Reports” HPV16-transformed cells can change human skin cell properties, aiding tumor growth.
5 citations
,
March 1981 in “PubMed” A girl grew extra hair in areas where she had insect bites.
February 2001 in “Chinese Journal of Dermatology” Epidermal growth factor (EGF) boosts the growth of hair follicle cells.
1 citations
,
August 2016 in “Dermatology - Open Journal” Mitochondria change shape to meet energy needs during cell movement.
October 2025 in “Folia Morphologica” Lymph vessels in airways vary by location, with the most in the upper pharynx and changes after birth.
1 citations
,
January 2012 in “International journal of trichology” Sheep hair follicle cells can grow a lot but need the dermal papilla to do so.
11 citations
,
June 1974 in “Journal of Cutaneous Pathology” Follicular mucinosis causes significant damage to hair follicle cells.
September 2009 in “International Journal of Dermatology and Venereology” Dermal papilla cells play a key role in hair growth and health.
28 citations
,
June 1995 in “The Journal of Dermatology” The flaky skin mouse mutation is a natural model for studying human psoriasis.
1 citations
,
January 2022 in “Anais brasileiros de dermatologia/Anais Brasileiros de Dermatologia” Reflectance confocal microscopy may help diagnose trichofolliculoma by showing specific skin features.
1 citations
,
April 2018 in “Turkish Journal of Dermatology” Childhood hypertrichosis is excessive hair growth not linked to hormones, with types based on location and origin.