title: Deterioration in carbohydrate metabolism and lipoprotein changes induced by modern, high fat diet in Pima Indians and Caucasians.
abstract: The transition from a high carbohydrate to a high fat diet may explain in part the dramatic increase in the prevalence of noninsulin-dependent diabetes mellitus among Pima Indians over the last century. In this study, 12 Pimas and 12 caucasians, all nondiabetic, were admitted to a metabolic ward and, in random order, fed 2 14-day weight-maintaining diets: a traditional Pima diet (percentage of calories: carbohydrate, 70% fat, 15%; protein, 15%) and a high fat modern diet (carbohydrate, 30%; fat, 50%; protein, 20%). Carbohydrate metabolism was characterized using the modified iv glucose tolerance test (minimal model), the acute insulin responses to arginine during a 3-step glycemic clamp, and the oral glucose tolerance test. Compared with the traditional diet, the modern diet was associated with a decrease in oral glucose tolerance (P less than 0.01) and higher plasma cholesterol concentrations (P less than 0.02). The decline in glucose tolerance was associated with similar insulin-mediated, but 23% lower glucose-mediated (P less than 0.001), glucose disposal, a 17% lower acute insulin response to glucose (P less than 0.03), a 9% lower beta-cell sensitivity to glucose (P less than 0.02), and similar beta-cell capacities. Pimas and caucasians responded similarly, except for larger changes in plasma lipids among the Pimas. Since glucose-mediated glucose disposal, beta-cell function, and glucose tolerance deteriorated on the modern diet, it is likely that diet composition affects the prevalence of noninsulin-dependent diabetes mellitus in both Pimas and caucasians.
authors.affiliation: Clinical Diabetes and Nutrition Section, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Phoenix, Arizona 85016.
authors.forename: B A
authors.initials: BA
authors.lastname: Swinburn
authors.forename: V L
authors.initials: VL
authors.lastname: Boyce
authors.forename: R N
authors.initials: RN
authors.lastname: Bergman
authors.forename: B V
authors.initials: BV
authors.lastname: Howard
authors.forename: C
authors.initials: C
authors.lastname: Bogardus
mesh_terms: D000328:Adult; D001120:Arginine; D001786:Blood Glucose / Q000378:metabolism*; D002784:Cholesterol / Q000097:blood; D004040:Dietary Carbohydrates / Q000008:administration & dosage*; D004041:Dietary Fats / Q000008:administration & dosage*; D004044:Dietary Proteins / Q000008:administration & dosage; D002149:Energy Intake; D005260:Female; D015309:Glucose Clamp Technique; D005951:Glucose Tolerance Test; D006801:Humans; D007198:Indians, North American; D007328:Insulin / Q000097:blood; D008074:Lipoproteins / Q000097:blood*; D008075:Lipoproteins, HDL / Q000097:blood; D008077:Lipoproteins, LDL / Q000097:blood; D008297:Male; D014280:Triglycerides / Q000097:blood; D044465:White People
chemical_list: D001786:Blood Glucose; D004040:Dietary Carbohydrates; D004041:Dietary Fats; D004044:Dietary Proteins; D007328:Insulin; D008074:Lipoproteins; D008075:Lipoproteins, HDL; D008077:Lipoproteins, LDL; D014280:Triglycerides; D001120:Arginine; D002784:Cholesterol