Phosphatidylinositol 3-Kinase, but Not p70/p85 Ribosomal S6 Protein Kinase, Is Required for the Regulation of Phosphoenolpyruvate Carboxykinase (PEPCK) Gene Expression by Insulin

Phosphoenolpyruvate carboxykinase (PEPCK) catalyzes the rate-limiting step in hepatic gluconeogenesis. Glucagon (via the second messenger cAMP) and glucocort...