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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Glucokinase gene locus transgenic mice are resistant to the development of obesity-induced type 2 diabetes.

Transgenic mice that overexpress the entire glucokinase (GK) gene locus have been previously shown to be mildly hypoglycemic and to have improved tolerance to glucose. To determine whether increased GK might also prevent or diminish diabetes in diet-induced obese animals, we examined the effect of feeding these mice a high-fat high-simple carbohydrate low-fiber diet (HF diet) for 30 weeks. In response to this diet, both normal and transgenic mice became obese and had similar BMIs (5.3 +/- 0.1 and 5.0 +/- 0.1 kg/m2 in transgenic and non-transgenic mice, respectively). The blood glucose concentration of the control mice increased linearly with time and reached 17.0 +/- 1.3 mmol/l at the 30th week. In contrast, the blood glucose of GK transgenic mice rose to only 9.7 +/- 1.2 mmol/l at the 15th week, after which it returned to 7.6 +/- 1.0 mmol/l by the 30th week. The plasma insulin concentration was also lower in the GK transgenic animals (232 +/- 79 pmol/l) than in the controls (595 +/- 77 pmol/l), but there was no difference in plasma glucagon concentrations. Together, these data indicate that increased GK levels dramatically lessen the development of both hyperglycemia and hyperinsulinemia associated with the feeding of an HF diet.[1]


  1. Glucokinase gene locus transgenic mice are resistant to the development of obesity-induced type 2 diabetes. Shiota, M., Postic, C., Fujimoto, Y., Jetton, T.L., Dixon, K., Pan, D., Grimsby, J., Grippo, J.F., Magnuson, M.A., Cherrington, A.D. Diabetes (2001) [Pubmed]
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