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Glucose-regulated insulin production from genetically engineered human non-beta cells

机译:基因工程人类非β细胞的葡萄糖调节胰岛素生产

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In this report we describe development and characterization of four human cell lines that are able to secrete insulin and C-peptide in response to higher concentrations of glucose. These cell lines have been developed by stably and constitutively expressing human proinsulin with a furincleavable site, whereas expression of furin is regulated by glucose concentration. These cell lines have been cloned and, therefore, the transgene in each cell is located in an identical location of the genome leading to a uniform expression. Cloning has also allowed us to identify cell lines with more desirable properties such as higher basal insulin secretion and/or better glucose responsiveness. We have further shown that the insulin produced by these cells is biologically active and induces normoglycemia when injected in diabetic animals. Our objective in initiating these studies was to identify a cell line that could serve as a surrogate beta cell line for therapeutic intervention in type I diabetic patients. (c) 2007 Elsevier Inc. All rights reserved.
机译:在本报告中,我们描述了四种人细胞系的发展和特征,它们能够响应较高浓度的葡萄糖而分泌胰岛素和C肽。这些细胞系是通过稳定且组成性表达具有可呋喃切割位点的人胰岛素原而开发的,而弗林蛋白酶的表达则受葡萄糖浓度的调节。这些细胞系已被克隆,因此,每个细胞中的转基因位于基因组的相同位置,从而导致均匀表达。克隆也使我们能够鉴定出具有更理想特性的细胞系,例如更高的基础胰岛素分泌和/或更好的葡萄糖反应性。我们进一步表明,由这些细胞产生的胰岛素具有生物活性,当注射到糖尿病动物体内时会诱导正常血糖。我们启动这些研究的目的是确定一种可以充当I型糖尿病患者治疗干预的替代β细胞系的细胞系。 (c)2007 Elsevier Inc.保留所有权利。

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