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  • Title: Wls is expressed in the epidermis and regulates embryonic hair follicle induction in mice.
    Author: Huang S, Zhu X, Liu Y, Tao Y, Feng G, He L, Guo X, Ma G.
    Journal: PLoS One; 2012; 7(9):e45904. PubMed ID: 23029304.
    Abstract:
    Wnt proteins are secreted molecules that play multiple roles during hair follicle development and postnatal hair cycling. Wntless (Wls) is a cargo protein required for the secretion of various Wnt ligands. However, its role during hair follicle development and hair cycling remains unclear. Here, we examined the expression of Wls during hair follicle induction and postnatal hair cycling. We also conditionally deleted Wls with K14-cre to investigate its role in hair follicle induction. K14-cre;Wls(c/c) mice exhibited abnormal hair follicle development, which is possibly caused by impaired canonical Wnt signaling. Meanwhile, Wnt5a is also expressed in embryonic epidermis, but Wnt5a null mice showed no significant defect in embryonic hair follicle morphogenesis. Therefore, Wls may regulate hair follicle induction by mediating the Wnt/β-catenin pathway.
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