Abstract
Human placenta extract (HPE) has been used to alleviate tiredness and promote wound healing, and for its antiageing functions; however, it has not yet been studied for its effects on hair growth. In the present study, we evaluated the in vitro effect of HPE on hair growth by observing its actions on human dermal papilla cells (DPCs). To define how HPE promotes induction of anagen hair growth during the telogen phase, and to understand the synergistic molecular mechanisms of HPE and minoxidil (MXD) actions on hair growth. We examined the effects of HPE and MXD on C57BL6/J mice using haematoxylin and eosin staining, quantitative histomorphometry, hair growth scoring, immunohistochemistry and immunofluorescence on the dorsal skins of C57BL/6J mice. We found that HPE synergistically augmented the effects of MXD, a promoter of hair growth. In particular, histomorphometric analysis data indicated that subcutaneous injection of HPE induced an earlier anagen phase and prolonged the anagen phase. It also stimulated increases in both the number and size of hair follicles in groups treated with HPE alone and HPE + MXD. From our data, we conclude that HPE increases β-catenin and Wnt3a expression levels. Overall, our findings suggest that H...Continue Reading
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