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Current Pharmaceutical Biotechnology


ISSN (Print): 1389-2010
ISSN (Online): 1873-4316

Research Article

Characterization of Optimized Functional-Complementary Dual Insulinotorpic Peptide rolGG

Author(s): Yaofang Zhang, Li Du, Yanling Xu, Lin Tian, Peipei Tu* and Minggang Li*

Volume 18 , Issue 10 , 2017

Page: [840 - 848] Pages: 9

DOI: 10.2174/1389201019666171204111908

Price: $65


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.

Keywords: GLP-1, GIP, diabetes, expression, purification, primers.

Graphical Abstract

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