Evaluation of Keratinocyte Proliferation and Differentiation in Vitamin D Receptor Knockout Mice

June 2000 in “ Endocrinology ”

Yoshiyuki Sakai

vitamin D receptor VDR keratinocyte alopecia hair cycle VDR knockout mice

Studysummary This study suggests that alopecia in vitamin D receptor null mice is due to impaired initiation of the hair cycle rather than defects in keratinocyte proliferation or differentiation.

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The study investigated the role of the vitamin D receptor (VDR) in keratinocyte function and its link to alopecia in VDR knockout mice. Despite VDR ablation causing alopecia, the research found no significant differences in keratinocyte proliferation or differentiation between VDR null and wild-type mice, both in vitro and in vivo. However, VDR null mice exhibited a significant impairment in initiating the hair cycle after depilation, suggesting that the alopecia observed was due to a defect in hair cycle initiation rather than keratinocyte abnormalities.

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