The vitamin D receptor is a Wnt effector that controls hair follicle differentiation and specifies tumor type in adult epidermis.

The vitamin D receptor is a Wnt effector that controls hair follicle differentiation and specifies tumor type in adult epidermis.
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DOI:
10.1371/journal.pone.0001483
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发表时间:
2008-01-23
期刊:
影响因子:
3.7
通讯作者:
Watt FM
Watt FM
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Pálmer HG;Anjos-Afonso F;Carmeliet G;Takeda H;Watt FM

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我们研究了Wnt和维生素D受体信号如何调节表皮分化。β-catenin诱导的许多表皮基因,包括干细胞标记物角蛋白15,都含有维生素D反应元件(VDREs),其中一些是独立于TCF/Lef诱导的。VDR是β-catenin诱导的成人表皮毛囊形成所必需的,维生素D类似物EB1089与β-catenin协同作用,刺激头发分化。人类毛囊瘤(毛囊肿瘤)的特点是高核β-catenin和VDR,而浸润性基底细胞癌(bcc)具有高核β-catenin和低核VDR水平。在小鼠中,EB1089可以阻止β-catenin诱导的毛滤泡瘤,而在缺乏VDR的情况下,β-catenin诱导类似bcc的肿瘤。我们得出结论,VDR是Wnt通路的TCF/ left独立转录效应物,维生素D类似物在Wnt信号不适当激活的肿瘤中具有治疗潜力。
We have investigated how Wnt and vitamin D receptor signals regulate epidermal differentiation. Many epidermal genes induced by β-catenin, including the stem cell marker keratin 15, contain vitamin D response elements (VDREs) and several are induced independently of TCF/Lef. The VDR is required for β-catenin induced hair follicle formation in adult epidermis, and the vitamin D analog EB1089 synergises with β-catenin to stimulate hair differentiation. Human trichofolliculomas (hair follicle tumours) are characterized by high nuclear β-catenin and VDR, whereas infiltrative basal cell carcinomas (BCCs) have high β-catenin and low VDR levels. In mice, EB1089 prevents β-catenin induced trichofolliculomas, while in the absence of VDR β-catenin induces tumours resembling BCCs. We conclude that VDR is a TCF/Lef-independent transcriptional effector of the Wnt pathway and that vitamin D analogues have therapeutic potential in tumors with inappropriate activation of Wnt signalling.
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