16 citations
,
July 2013 in “The American Journal of Dermatopathology” Pigmented casts are common in several hair loss conditions and can help diagnose specific types of alopecia.
11 citations
,
May 2012 in “Genesis” Bmpr2 and Acvr2a receptors are crucial for hair retention and color.
The human scalp has different types of pigment cells in hair follicles with varying abilities to produce pigment.
July 2016 in “Indian journal of science and technology” Neonate scalp hair is thinner, lacks a medulla, and has smaller follicles compared to adult hair.
Melanocytes can regenerate around hair follicles in bullous pemphigoid, especially in patients with darker skin.
36 citations
,
November 2019 in “Molecular biology and evolution” Cysteine-rich keratins evolved independently in mammals, reptiles, and birds for hard skin structures like hair, claws, and feathers.
86 citations
,
April 2009 in “Journal of anatomy” Hard skin features like scales, feathers, and hair evolved through specific protein changes in different animal groups.
1 citations
,
January 2012 in “Human health handbooks” Hair color is determined by melanin types and gene activity.
1 citations
,
March 2015 in “Journal of Visualized Experiments” Researchers developed a new, precise method to measure hair loss in mice using image analysis.
June 2010 in “Journal of Veterinary Clinics” The method visualized calcium ions in damaged canine skin, showing potential for studying skin recovery.
3 citations
,
November 2018 in “Journal of osteopathic medicine” A rare scalp condition causing hair loss improved with a specific cream.
92 citations
,
December 2016 in “Scientific Reports” Researchers identified genes linked to coat color, body size, cashmere production, and high altitude adaptation in goats.
28 citations
,
September 2013 in “European Journal of Histochemistry” Keratins in Malayan pangolins vary by region, suggesting scales evolved from the tail towards the head.
46 citations
,
March 2005 in “Endocrinology” Overexpression of the glucocorticoid receptor in mice causes developmental defects similar to ectodermal dysplasia.
2 citations
,
June 2003 in “American Journal of Dermatopathology” A unique case of skin cancer showed unusual calcification, possibly linked to calcium-binding proteins.
January 2016 in “ISBN: 978-84-608-9184-0” November 2021 in “CRC Press eBooks” Hair color is determined by melanin and can be affected by genetic conditions like albinism.
5 citations
,
March 2017 in “Gene” CAP1 decreases the expression of a hair-related protein in young Tan sheep's skin.
29 citations
,
May 2023 in “Cell”
5 citations
,
June 2020 in “Experimental dermatology” Redheaded people may have evolved to efficiently make vitamin D in areas with less sunlight.
1 citations
,
January 2023 in “PubMed”
2 citations
,
November 1995 in “American Journal of Obstetrics and Gynecology” Taking vitamin B6 corrected a pregnant woman's metabolic disorder, which changed her hair color.
June 2025 in “British Journal of Dermatology” Certain hair and scalp features can predict the severity of alopecia areata.
2 citations
,
October 2001 in “Mycoses” A cat had a rare fungal infection caused by Microsporum gypseum.
51 citations
,
November 2005 in “Journal of Medical Primatology” Alopecia in captive rhesus macaques is affected by season, sex, age, housing, and stress, with complex links between stress hormones and hair loss.
August 2018 in “Journal of The American Academy of Dermatology” Older men's scalp damage increases with age and sun exposure, a baby girl in the Philippines has Schimmelpenning syndrome, and thyroid screening is advised for children with hair loss and certain risk factors.
8 citations
,
January 2013 in “BioMed Research International” Age, gender, and hair loss affect scalp characteristics differently in young Caucasian adults.
55 citations
,
December 2021 in “BMC Veterinary Research” Certain genes in Iranian sheep are linked to wool production and heat adaptation.
February 2023 in “Mağallaẗ Tikrīt li-l-ʻulūm al-ṣirfaẗ/Tikrit journal of pure science” Horse skin has a layered epidermis, a dermis with hair follicles, sweat and sebaceous glands, and is supplied by small arteries.
8 citations
,
March 2014 in “Experimental Dermatology” Light and temperature affect the daily skin function rhythms in hairless rats, with temperature influencing water loss but not skin hydration.