Background
Gastric inhibitory peptide 1 (GIP-1) (3-42) is a peptide fragment of the incretin hormone GIP and a GIP receptor antagonist.1 It is formed from GIP by serum dipeptidyl peptidase 4 (DDP-4). GIP-1 (3-42) (100 nM) reduces insulin secretion from BRIN-BD11 pancreatic cells. It increases plasma glucose levels and decreases plasma insulin levels in an ob/ob mouse model of diabetes when administered at a dose of 25 nmol/kg.
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