tailieunhanh - Báo cáo khoa học: "Insulin Sensitivity of Heifers on Different Diets"

Tuyển tập các báo cáo nghiên cứu về bệnh thú y được đăng trên tạp chí y học General Psychiatry cung cấp cho các bạn kiến thức về ngành thú y đề tài: Insulin Sensitivity of Heifers on Different Diets. | Acta vet. scand. 2002 43 107-114. Insulin Sensitivity of Heifers on Different Diets By K. Sternbauer and J. Luthman Department of Ruminant Medicine and Veterinary Epidemiology Swedish University of Agricultural Science Uppsala Sweden. Sternbauer K Luthman J Insulin sensitivity of heifers on different diets. Acta vet. scand. 2002 43 107-114. - The hyperinsulinemic euglycemic clamp technique was used to investigate the effect on insulin sensitivity of 2 different diets used in practical cattle feeding in calves. Ten 4 to 5-month-old heifer calves were allocated to 2 feeding groups LO or HI to obtain growth rates of400 g day or 900 g day. The heifers were fed and housed individually for 5 weeks. Growth rates close to calculated rates were obtained with the diets used. Weekly blood samples were collected from the jugular vein for analysis of glucose insulin cortisol total serum protein urea cholesterol and non-esterified fatty acids. During week 5 insulin sensitivity was estimated using the hyper-insulinemic euglycemic clamp technique. Insulin sensitivity did not differ between the groups but the plasma glucose levels were higher during weeks 3 and 4 for the HI group compared to the LO group. It may be concluded that the amount of concentrate in the diet was too low to induce changes in either the basal plasma insulin levels or the insulin sensitivity in the HI group. hyperinsulinemic euglycemic clamp insulin glucose feeding cattle ruminants. Introduction Ruminants are generally considered to be less sensitive to insulin than non-ruminants and it has been shown that the insulin mediated glucose disposal is significantly lower in hay-fed sheep than is earlier reported in monogastric animals Janes et al. 1985 . However insulin is of major importance for glucose homeostasis and for the partitioning of nutrients to the different tissues also in ruminants. The tissue sensitivity to insulin is of special interest in lactating animals. The glucose uptake by the udder is .