Effect of adrenomedullin on insulin sensitivity in normal Wistar rats / 中华内分泌代谢杂志

ABSTRACT

The effect of adrenomedullin (AM) on insulin sensitivity in normal Wistar rats was investigated by hyperinsulinemic-euglycemic clamp in combination with isotope dilution technique. The infusion rates of AM during the clamp were 0, 0.05, 0.2, 1 ?g?kg~(-1)?min~(-1), rspectively. The glucose disposal rate (GDR) and hepatic glucose output (HGO) were calculated by the plasma 3-~(3)H-glucose specific activity. After AM infusion, the insulin-mediated glucose disposal was reduced in a dose-dependant manner. It indicated that high dose of AM could induce a marked state of insulin resistance, which was mainly characterized by inhibition of the effect of insulin to stimulate peripheral glucose metabolism.