GIP Receptor Antagonist Studies in Humans

Aim: To evaluate the GIP receptor antagonizing effect of peptide-based competitive GIP receptor antagonist GIP-A (vs. saline (placebo)) in 10 healthy subjects during 1 hour hyperglycaemic clamps with and without concomitant iv infusion of GIP\[1-42\]. The intention is to establish GIP-A as a tool to eliminate glucose-dependent insulinotropic GIP signalling. The study consists of four experimental days (A-D) with assessment of beta cell function during 12 mM-hyperglycaemic clamps with concomitant infusions of A) GIP\[1-42\], B) GIP-A, C) GIP\[1-42\] + GIP-A, or D) saline (placebo).