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

Inhibition of glucagon-stimulated cAMP accumulation and fatty acid oxidation by E-series prostaglandins in isolated rat hepatocytes.

E-series prostaglandins have been shown to inhibit hepatic glucagon-stimulated glycogenolysis without inhibiting glycogenolysis stimulated by cAMP analogs. In the present studies, prostaglandin E2 and 16,16-dimethylprostaglandin E2 inhibited glucagon-stimulated cAMP accumulation in isolated rat hepatocytes by 25% and 46%, respectively, without affecting basal cAMP levels. Half-maximal inhibition of glucagon-stimulated cAMP accumulation occurred at approx. 10(-7) M 16,16-dimethylprostaglandin E2. 16,16-Dimethylprostaglandin E2 inhibited glucagon-stimulated palmitate oxidation in intact hepatocytes without affecting basal rates of palmitate oxidation. 16,16-Dimethylprostaglandin E2 had no effect on palmitate oxidation in a liver homogenate system. These studies demonstrate that prostaglandin E antagonizes the effects of glucagon on hepatic metabolism by inhibiting glucagon-stimulated cAMP accumulation.[1]


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