Effects of Type of Diet and Salinomycin Supplementation on Insulin Secretory Response and Action in Sheep

Abstract

Hyperglycemic clamp and hyperinsulinemic euglycemic clamp techniques were used to investigate the effects of type of diet and salinomycin supplementation on the insulin secretory response to glucose and tissue responsiveness to insulin in adult sheep. The sheep were fed a high-roughage and a high-concentrate diet at equal energy intakes with or without 20ppm of salinomycin for 3 weeks. Basal plasma glucose concentrations were unaffected by type of diet or salinomycin supplementation in both glucose clamp experiments. The ratio of plasma insulin increments to glucose infusion rates in the hyperglycemic clamp experiment and the glucose infusion rate in the hyperinsulinemic euglycemic clamp experiment were unaffected by type of diet or salinomycin supplementation. Although the number of data was small in the present study, these results suggest that in sheep salinomycin supplementation has no significant effects on either the insulin secretory response to glucose or on insulin action, regardless of type of diet.