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N Westmoreland

Publications and source records attributed to N Westmoreland.

11 recordsLinked to original sources
PubMed1982

Dietary effects on metabolism of Yucatan miniature swine selected for low and high glucose utilization.

Yucatan miniature swine have been selected for increased (high K) or decreased (low K) ability to utilize glucose based on an intravenous glucose tolerance test (IVGTT). In this study we tested the effect of obesity in conjunction with ad libitum, high sucrose or high starch diets on IVGTT and the insulin response to glucose in these two lines of animals. Either diet caused increased glucose utilization and an increased insulin response in the low K animals. Neither diet caused a change in these parameters in the high K pigs. There were no differences in either line of animals due to sucrose vs starch diets. During an insulin impedance test both the mean steady state plasma glucose and plasma serum insulin concentration were significantly higher in the high K animals (P less than 0.01).

Animals↗
PubMed1982

Yucatan miniature swine as a model for the study of human diabetes mellitus.

Two lines of Yucatan miniature swine have been developed by genetic selection for decreased and increased glucose clearance during an i.v. glucose tolerance test. The decreased glucose clearance is due to low peripheral insulin levels usually from a decrease in insulin secretion. In two pigs the decreased peripheral insulin resulted from increased hepatic uptake of insulin. During gestation and lactation, an increased insulin resistance and a diabetic-like state occurs in some animals. When fed a low fiber diet that contains 40% of calories from saturated fat (a typical American diet), Yucatan swine become more glucose intolerant. Seven to ten animals on the diet from the glucose intolerant line showed a glucose tolerance curve that would have been classified as diabetic if they were humans utilizing both intravenous and oral glucose tolerance tests. Miniature swine from this line are available to interested researchers.

Animals↗
PubMed1976

Metabolic influences in experimental thrombosis.

Studies presented in this report demonstrate that intravascular coagulation and thrombosis in the whole animal can be greatly influenced by noncoagulation factors, such as metabolic, endocrinologic, and nutritional states. Injection of a partially purified human serum procoagulant fraction produced no significant clotting abnormalities in normal fed rats; however, injection of an identical preparation in fasted, diabetic, and obese rats produced hypercoagulability of blood, thrombosis, and hemorrhage. Glucose injection in fasted rats and insulin injection in diabetic rats reversed their susceptibility to thrombosis. The concentrations of serum free fatty acids were shown to be elevated in the susceptible animals; however, they returned to normal in fasted and diabetic rats after injections of glucose and insulin, respectively. Infusion of free fatty acid-albumin preparations in normal fed rats rendered the animals susceptible to thrombosis when challenged with the serum procoagulant fraction.

Animals↗