Insulin response of components of whole-body and muscle carbohydrate metabolism in humans
- 1 February 1988
- journal article
- research article
- Published by American Physiological Society in American Journal of Physiology-Endocrinology and Metabolism
- Vol. 254 (2), E231-E236
- https://doi.org/10.1152/ajpendo.1988.254.2.e231
Abstract
We measured total body insulin-mediated glucose uptake, carbohydrate oxidation, storage (nonoxidative disposal), muscle glycogen synthase activity, and muscle glucose 6-phosphate (G-6-P) content in response to five levels of insulinemia (means 16, 52, 152, 573, and 5,550 microU/ml) in 16 male glucose-tolerant volunteers. Insulin dissociation constants (KDs) for disposal, storage, and synthase activity (but not for oxidation) are coincident, suggesting that storage via glycogen synthesis could be a major determinant of glucose disposal. Increases in glucose disposal were associated with decreases in muscle G-6-P concentration. These data suggest that the principal control over carbohydrate disposal is exerted after G-6-P. The coincidence of insulin sensitivities for disposal, storage, and synthase activity suggest that storage via glycogen synthesis could be a major determinant of glucose disposal.This publication has 24 references indexed in Scilit:
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