Insulin Access to Skeletal Muscle is Preserved in Obesity Induced by Polyunsaturated Diet
| Autor: | Malini S. Iyer, Isaac Asare Bediako, Rebecca L. Paszkiewicz, Richard N. Bergman, Josiane L. Broussard, Cathryn M. Kolka |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
medicine.medical_specialty
Endocrinology Diabetes and Metabolism medicine.medical_treatment Saturated fat Medicine (miscellaneous) 030209 endocrinology & metabolism Type 2 diabetes 030204 cardiovascular system & hematology 03 medical and health sciences Polyunsaturated fat 0302 clinical medicine Endocrinology Insulin resistance Internal medicine medicine Hyperinsulinemia 2. Zero hunger Nutrition and Dietetics biology business.industry Insulin Skeletal muscle medicine.disease Insulin receptor medicine.anatomical_structure biology.protein business |
| Zdroj: | Obesity. 26:119-125 |
| ISSN: | 1930-7381 |
| DOI: | 10.1002/oby.22057 |
| Popis: | OBJECTIVE Diets high in saturated fat induce obesity and insulin resistance and impair insulin access to skeletal muscle, leading to reduced insulin levels at the muscle cell surface available to bind insulin receptors and induce glucose uptake. In contrast, diets supplemented with polyunsaturated fat improve insulin sensitivity (SI) and reduce the risk for type 2 diabetes. It was hypothesized that a diet high in polyunsaturated fat would preserve SI and insulin access to muscle, as compared with a diet high in saturated fat. METHODS After 12 weeks of control, saturated (LARD), or polyunsaturated (salmon oil [SO]) high-fat diet feeding, muscle SI and insulin access to skeletal muscle were measured by using lymph, a surrogate of skeletal muscle interstitial fluid. RESULTS Both high-fat diets induced similar weight gain, yet only LARD impaired SI. Hyperinsulinemia in the LARD group did not induce an increase in basal interstitial insulin, suggesting reduced insulin access to muscle after LARD, but not after SO. CONCLUSIONS A diet high in polyunsaturated fat does not impair insulin access to muscle interstitium or induce insulin resistance as observed with a saturated fat diet, despite similar weight gain. Future studies should determine whether dietary SO supplementation improves impairments in insulin access to skeletal muscle. |
| Databáze: | OpenAIRE |
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