Active immunisation against gastric inhibitory polypeptide (GIP) improves blood glucose control in an animal model of obesity-diabetes
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Nigel Irwin
Abstract
Recent research suggests that long-term ablation of gastric inhibitory polypeptide (GIP) receptor signalling can reverse or prevent many of the metabolic abnormalities associated with dietary and genetically induced obesity-diabetes. The present study was designed to assess the sub-chronic effects of passive or active immunisation against GIP in ob/ob mice. Initial acute administration of GIP antibody together with oral glucose in ob/ob mice significantly increased the glycaemic excursion compared to controls (p<0.05). This was associated with a significant reduction (p<0.05) in the overall glucose-mediated insulin response. However, sub-chronic passive GIP immunisation was not associated with any changes in body weight, food intake or metabolic control. In contrast, active immunisation against GIP for 56 days in young ob/ob mice resulted in significantly (p<0.05) reduced circulating plasma glucose concentrations on day 56 compared to controls. There was a tendency for decreased circulating insulin in GIP immunised mice. The glycaemic response to intraperitoneal glucose was correspondingly improved (p<0.05) in mice immunised against GIP. Glucose-stimulated insulin levels were not significantly different from controls. Furthermore, insulin sensitivity was similar in mice immunised against GIP and respective controls. Overall, the results reveal that active, as opposed to passive, immunisation against GIP improves blood glucose control ob/ob mice.
©2009 by Walter de Gruyter Berlin New York
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Articles in the same Issue
- Editor's Note
- Editor's Note
- Protein Structure and Function
- Glyceryl ether monooxygenase resembles aromatic amino acid hydroxylases in metal ion and tetrahydrobiopterin dependence
- Biochemical characterization of the catalytic domains of three different clostridial collagenases
- Impact of detergents on the activity of acetylcholinesterase and on the effectiveness of its inhibitors
- The ADP-ribosylating thermozyme from Sulfolobus solfataricus is a DING protein
- Membranes, Lipids, Glycobiology
- Glycosphingolipids from bovine milk and milk fat globule membranes: a comparative study. Adhesion to enterotoxigenic Escherichia coli strains
- Mannose 6-phosphate receptor-dependent endocytosis of lysosomal enzymes is increased in sulfatide-storing kidney cells
- Cell Biology and Signaling
- Heavy metals induce phosphorylation of the Bcl-2 protein by Jun N-terminal kinase
- Fibroblast growth factor 2 (FGF-2) is a novel substrate for arginine methylation by PRMT5
- Differential functions of the Apoer2 intracellular domain in selenium uptake and cell signaling
- Active immunisation against gastric inhibitory polypeptide (GIP) improves blood glucose control in an animal model of obesity-diabetes
- Novel Techniques
- Applicability of superfolder YFP bimolecular fluorescence complementation in vitro
