Alopecia areata is reversible because hair follicles can regenerate due to stem cells.
139 citations
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October 2005 in “Journal of Investigative Dermatology” The nail matrix has a reduced immune response, protecting it from autoimmunity.
3 citations
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April 2019 in “The journal of investigative dermatology/Journal of investigative dermatology” ILC1 cells contribute to hair loss in alopecia areata.
150 citations
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October 2010 in “The American Journal of Pathology” The document concludes that more research is needed to better understand and treat primary cicatricial alopecias, and suggests a possible reclassification based on molecular pathways.
25 citations
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March 2014 in “Experimental Dermatology” Leptin helps start the growth phase of hair.