Canine Follicle Stem Cell Candidates Reside in the Bulge and Share Characteristic Features with Human Bulge Cells

April 2010 in “ The journal of investigative dermatology/Journal of investigative dermatology ”

Tetsuro Kobayashi, Tadaaki Iwasaki, Masayuki Amagai, Manabu Ohyama

hair follicles stem cell candidates bulge cells label-retaining cells LRCs biomarkers CD200 DIO2 keratinocytes proliferative capacity pilosebaceous structures in vitro in vivo stem cells

Studysummary This study found that canine bulge-derived keratinocytes are highly proliferative and can reconstitute pilosebaceous structures, indicating their potential utility in studying human stem cell biology and hair disorders.

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The study identified and characterized stem cell candidates in canine hair follicles, finding that these cells shared many features with human bulge cells, including the location of label-retaining cells (LRCs) and the expression of biomarkers like CD200 and DIO2. Canine bulge cell-enriched keratinocytes demonstrated high proliferative capacity in vitro and could regenerate pilosebaceous structures in vivo. The findings suggested that canine bulge cells could serve as a valuable model for studying human hair follicle biology and related disorders, despite the small sample size (n=3 to n=9) indicating preliminary findings that need further validation.

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