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July 1999 in “Dermatologic Clinics” The document concludes that immune system abnormalities cause alopecia areata, but the exact process is still not completely understood.
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January 2009 in “The Journal of Dermatology” Hair follicle stem cells can turn into various cell types and help repair nerves.
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February 2009 in “Molecular biology of the cell” Disrupting Smad4 in mouse skin causes early hair follicle stem cell activity that leads to their eventual depletion.
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July 2018 in “Advances in Clinical and Experimental Medicine” Different body parts have varying levels of certain hair follicle markers.
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July 2023 in “Journal of developmental biology” Bird foot scales develop differently and can repair but not fully regenerate due to the lack of specialized stem cell areas.
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October 2009 in “Cancer research” Disrupting Stat3 in hair follicle stem cells greatly reduces skin tumor formation.
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October 2013 in “PloS one” Human sweat glands have a type of stem cell that can grow well and turn into different cell types.
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Glycyrrhizic acid and licorice extract can significantly reduce unwanted hair growth.
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