February 2023 in “bioRxiv (Cold Spring Harbor Laboratory)” Merkel cells stabilize nerve endings in the skin, and they change independently of each other.
3 citations
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January 2025 in “动物学研究” The gene GJA1 is important for regulating coarse hair density in goats.
10 citations
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December 2015 in “International Journal of Molecular Sciences” PDCD4 is important for controlling skin cell growth and healing.
66 citations
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July 2007 in “Journal of Molecular Medicine” Stress increases certain chemicals in the skin and nerves, which might worsen skin conditions.
155 citations
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May 2016 in “Nature communications” Memory T cells in the skin balance staying put and moving into the blood, clustering around hair follicles, and increasing in number after infection.
December 2024 in “Skin Appendage Disorders” Traction alopecia reduces hair density and thickness; proper hair care can help prevent it.
15 citations
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December 1972 in “Journal of Investigative Dermatology” December 2022 in “JEADV Clinical Practice” Hair density and thickness decrease in specific scalp areas in people with androgenetic alopecia.
6 citations
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January 2010 in “PubMed” Scalp psoriasis is linked to impaired hair growth with more hair in the resting phase.
1 citations
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May 2016 in “Hair transplant forum international” The best dot density for scalp tattoos gives women with hair loss a natural look and high satisfaction.
24 citations
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September 2012 in “Dermatologic Surgery” The conclusion is that normal scalp hair counts for Taiwanese people were established, showing age-related differences but not sex or scalp location differences.
April 2023 in “Journal of Investigative Dermatology” Higher PD-1 levels are linked to fewer immune cells in hair follicles in alopecia areata.
34 citations
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July 2006 in “The Journal of Comparative Neurology” Increasing neurotrophin 4 in skin boosts nerve endings but not sensory neuron count.
79 citations
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November 2010 in “Journal of Neuroscience” Hair clipping can trigger axon growth and changes in the skin.
2 citations
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March 2009 in “Hair transplant forum international” Men generally have a certain thickness of hair at their hairline.
16 citations
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November 2005 in “Journal of Clinical Pathology” CD1d expression in scalp skin and hair follicles changes with the hair cycle and may help protect against microbes.
September 2022 in “International Journal of Trichology” Trichoscopic measurements help determine the severity of female pattern hair loss.
122 citations
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June 1998 in “PubMed” Neurotrophins regulate nerve growth by balancing promotion and suppression.
10 citations
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January 2013 in “Stem Cells and Development” Scientists identified a unique type of human skin stem cell that could help with tissue repair.
Higher PD-1 levels mean fewer CD8+ T cells in alopecia areata hair follicles.
31 citations
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November 1991 in “Brain Research” Aδ-LTMRs have complex synapses with glycine, while Aβ-LTMRs have simpler ones.
31 citations
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December 2017 in “Skin Appendage Disorders” Caucasians have the highest hair density, followed by Hispanics, with the lowest in individuals of African descent.
1 citations
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May 2025 in “Animal Bioscience” Four genes affect hair follicle density in goats.
211 citations
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April 2013 in “Development” More dermal papilla cells in hair follicles lead to larger, healthier hair, while fewer cells cause hair thinning and loss.
October 2021 in “Journal of Investigative Dermatology” The study concluded that the developed models are effective for studying hair growth mechanisms and testing new treatments.
11 citations
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October 2018 in “The Journal of Dermatology” Decorin helps keep hair follicle stem cells and may prevent age-related hair loss.
April 2025 in “British Journal of Dermatology” Age, sex, BMI, menopause, and specific genes affect hair density in East Asians.
12 citations
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January 1994 in “Dermatology” The patient's hair had unique damage and a lower sulfur-to-nitrogen ratio compared to relatives, but not compared to healthy controls.
6 citations
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June 2016 in “The anatomical record” Dogs have varying numbers of touch-sensitive Merkel cells in different skin areas, with most in the oral mucosa and facial skin, unrelated to age, sex, breed, or color.
June 2024 in “Nature Cell and Science” The Scalp Coverage Scoring method reliably measures hair density from images.