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Characterization of Optimized Functional-Complementary Dual Insulinotorpic Peptide rolGG

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Background: Glucagon-like peptide-1 (GLP-1) and gastric inhibitory polypeptide (GIP) play a similar but complementary role in the regulation of glucose levels in islet β-cells. This study was aimed to develop a fusion peptide, which combines 4 tandem repeated GLP-1 and 4 tandem repeated GIP (4rolGG), and to investigate its therapeutic effect on type 2 diabetes using a diabetic mice model.

Methods: A 4rolGG expression plasmid was constructed and expressed in BL21 (DE3). By inducting with IPTG, 4rolGG was expressed at a high level, which was confirmed by SDS-PAGE electrophoresis and Western Blotting. Subsequently, 4rolGG was purified by Ni-NTA affinity chromatography and the purity of 4rolGG was up to 90%.

Result and Conclusion: After oral administration of 4rolGG for 4 weeks, streptozotocin-induced diabetic mice showed a dramatic reduction in the levels of plasma glucose, GHbA1C, TC and TG, while the insulin levels were increased significantly.
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Keywords: GIP; GLP-1; diabetes; expression; primers; purification

Document Type: Research Article

Publication date: August 1, 2017

This article was made available online on December 11, 2017 as a Fast Track article with title: "Characterization of Optimized Functional-Complementary Dual Insulinotorpic Peptide rolGG".

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  • Current Pharmaceutical Biotechnology aims to cover all the latest and outstanding developments in Pharmaceutical Biotechnology. Each issue of the journal contains a series of timely in-depth reviews written by leaders in the field covering a range of current topics in both pre-clinical and clinical areas of Pharmaceutical Biotechnology. Current Pharmaceutical Biotechnology is an essential journal for academic, clinical, government and pharmaceutical scientists who wish to be kept informed and up-to-date with the latest and most important developments.
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