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

Insulin resistance in the liver in fasting and diabetes mellitus: the failure of insulin to stimulate the release of a chemical modulator of pyruvate dehydrogenase.

To further define the mechanism(s) of insulin resistance in the liver associated with diabetes and fasting, we evaluated the ability of insulin to release an activator of pyruvate dehydrogenase activity from a liver particulate fraction. Insulin reproduceably and significantly enhanced the release of mediator from the liver particulate fraction of control animals. The particulate fractions from fasted and diabetic animals were resistant to this effect of insulin. Refeeding and insulin treatment, respectively, restored responsiveness to insulin. These data support the concept that alterations at or near the plasma membrane can be responsible for or accompany the insulin resistance observed in the liver in fasting and diabetes mellitus.[1]


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