January 1995 in “Skin Cancer” The outer root sheath in hair follicles changes during growth, with different keratinization processes in its layers.
May 2020 in “bioRxiv (Cold Spring Harbor Laboratory)” The study found that certain genes are important for hedgehog skin appendage development and immunity, with spines possibly evolving for protection and infection resistance.
25 citations
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October 1962 in “Journal of Ultrastructure Research” The hair follicle structure is more complex than thought, with new findings on protein formation.
Type II spiral ganglion neurites avoid high concentrations of laminin and fibronectin.
4 citations
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January 2015 in “Sen'i Gakkaishi” Hair and wool strength is affected by the number and type of bonds in their protein structures, with hair having more protein aggregates than wool.
44 citations
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October 1990 in “Archives of Dermatological Research” The connective tissue around hair follicles changes structure throughout the hair cycle.
April 2023 in “Journal of Investigative Dermatology” The research updated the skin cell profile, finding new skin cell markers and showing fibroblasts' key role in skin health.
45 citations
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December 2007 in “The FASEB journal” There are two types of stem cells in rodent hair follicles, each with different keratin proteins.
1 citations
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January 1992 in “Bangladesh Journal of Animal Science” Camel skin has typical mammalian layers, with hair follicles, glands, and muscles, varying by body area.
April 2026 in “Reviews in Medical Virology” Trichodysplasia spinulosa is a rare skin condition linked to weakened immune systems, mostly in organ transplant patients.
4 citations
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September 2015 in “JAAD case reports” Substance P may play a role in the inflammation seen in keratosis follicularis spinulosa decalvans.
46 citations
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August 1977 in “Journal of Morphology” The big-clawed shrew's sinus hair follicles are highly specialized for sensing vibrations.
11 citations
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January 1981 in “Cells Tissues Organs” Human hair cuticle has five cell layers with specific junctions and granules.
89 citations
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May 2005 in “Stem Cells” Mouse skin has special cells in the epidermis that decrease with age and are linked to keratinocyte stem cells.
50 citations
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March 2001 in “Clinics in dermatology” Human hair is complex and grows in cycles starting from embryonic life.
6 citations
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August 1937 in “Journal of the Society of Chemical Industry” 19 citations
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March 2016 in “British journal of dermatology/British journal of dermatology, Supplement” Trichodysplasia spinulosa is a rare skin disease in immunocompromised patients caused by a specific virus targeting hair follicle cells.
17 citations
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May 1969 in “American Journal of Physical Anthropology” The silver marmoset's skin is thin, lacks pigment cells, and has unique features like keratinized spines and specialized glands.
24 citations
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November 2015 in “Scientific reports” Human hair has a new region with ordered filaments and the cuticle contains β-keratin sheets.
2 citations
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April 2019 in “Experimental Dermatology” Hair follicles respond differently to pulling forces in various regions.
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.
745 citations
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February 1992 in “Trends in genetics” Hair follicles create different cell layers and proteins, controlled by various molecules.
4 citations
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September 2012 in “Journal of dermatological science” The hair follicle's connective tissue is a key source of a certain collagen in human scalp skin.
67 citations
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December 1990 in “The journal of cell biology/The Journal of cell biology” Researchers found genes for cysteine-rich proteins that form the protective layer of hair in humans and sheep.
April 2024 in “Indian dermatology online journal” A rare hair follicle disorder can cause itchy, bluish-black bumps on the body.
39 citations
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June 2018 in “Burns” The spiny mouse can fully regenerate skin after burns, unlike the lab mouse.
July 1995 in “Journal of Dermatological Science” 6 citations
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February 2020 in “Journal of Cutaneous Pathology” Nevus psiloliparus lacks mature hair follicles but keeps other skin structures intact.
17 citations
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September 2014 in “PLoS ONE” SK2 channels help control sensory signals in rat muscle spindles and hair follicles.
46 citations
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July 2007 in “Journal of comparative neurology” Manatee whiskers are specially adapted for touch in water.