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. 2003 Jul 18;301(5631):370-3.
doi: 10.1126/science.1084073.

Allosteric activators of glucokinase: potential role in diabetes therapy

Joseph Grimsby  1 , Ramakanth Sarabu, Wendy L Corbett, Nancy-Ellen Haynes, Fred T Bizzarro, John W Coffey, Kevin R Guertin, Darryl W Hilliard, Robert F Kester, Paige E Mahaney, Linda Marcus, Lida Qi, Cheryl L Spence, John Tengi, Mark A Magnuson, Chang An Chu, Mark T Dvorozniak, Franz M Matschinsky, Joseph F Grippo
Affiliations

Allosteric activators of glucokinase: potential role in diabetes therapy

Joseph Grimsby et al. Science. .

Abstract

Glucokinase (GK) plays a key role in whole-body glucose homeostasis by catalyzing the phosphorylation of glucose in cells that express this enzyme, such as pancreatic beta cells and hepatocytes. We describe a class of antidiabetic agents that act as nonessential, mixed-type GK activators (GKAs) that increase the glucose affinity and maximum velocity (Vmax) of GK. GKAs augment both hepatic glucose metabolism and glucose-induced insulin secretion from isolated rodent pancreatic islets, consistent with the expression and function of GK in both cell types. In several rodent models of type 2 diabetes mellitus, GKAs lowered blood glucose levels, improved the results of glucose tolerance tests, and increased hepatic glucose uptake. These findings may lead to the development of new drug therapies for diabetes.

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