Center of Animal Biotechnology and Gene Therapy, Universitat Autònoma de Barcelona, Bellaterra, Spain.
Department of Biochemistry and Molecular Biology, Universitat Autònoma de Barcelona, Bellaterra, Spain.
Diabetes. 2020 May;69(5):927-939. doi: 10.2337/db19-0757. Epub 2020 Feb 21.
Vitamin D deficiency has been associated with increased incidence of diabetes, both in humans and in animal models. In addition, an association between vitamin D receptor (VDR) gene polymorphisms and diabetes has also been described. However, the involvement of VDR in the development of diabetes, specifically in pancreatic β-cells, has not been elucidated yet. Here, we aimed to study the role of VDR in β-cells in the pathophysiology of diabetes. Our results indicate that expression was modulated by glucose in healthy islets and decreased in islets from both type 1 diabetes and type 2 diabetes mouse models. In addition, transgenic mice overexpressing VDR in β-cells were protected against streptozotocin-induced diabetes and presented a preserved β-cell mass and a reduction in islet inflammation. Altogether, these results suggest that sustained VDR levels in β-cells may preserve β-cell mass and β-cell function and protect against diabetes.
维生素 D 缺乏与糖尿病的发病率增加有关,无论是在人类还是在动物模型中。此外,维生素 D 受体 (VDR) 基因多态性与糖尿病之间也存在关联。然而,VDR 在糖尿病的发展中,特别是在胰岛β细胞中的作用尚未阐明。在这里,我们旨在研究 VDR 在糖尿病病理生理学中β细胞中的作用。我们的结果表明,在健康胰岛中,葡萄糖调节 VDR 的表达,而在 1 型和 2 型糖尿病小鼠模型的胰岛中则减少。此外,过表达 VDR 的转基因小鼠对链脲佐菌素诱导的糖尿病具有保护作用,β细胞的质量和胰岛炎症减少。总之,这些结果表明,β细胞中持续的 VDR 水平可能有助于维持β细胞的质量和功能,并预防糖尿病。