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- W2076397765 abstract "Phosphoenolpyruvate carboxykinase (PEPCK; EC 4.1.1.32) is the rate-controlling enzyme in gluconeogenesis. In diabetic individuals, altered rates of gluconeogenesis are responsible for increased hepatic glucose output and sustained hyperglycemia. Liver-specific inhibition of PEPCK has not been assessed to date as a treatment for diabetes. We have designed a therapeutic, vector-based RNAi approach to induce posttranscriptional gene silencing of hepatic PEPCK using nonviral gene delivery. A transient reduction of PEPCK enzymatic activity (7.6 +/- 0.6 vs 9.7 +/- 1.1 mU/mg, P < 0.05) that correlated with decreased protein content of up to 50% was achieved using this strategy in diabetic mice. PEPCK partial silencing was sufficient to demonstrate lowered blood glucose (218 +/- 26 vs 364 +/- 33 mg/dl, P < 0.001) and improved glucose tolerance together with decreased circulating FFA (0.89 +/- 0.10 vs 1.44 +/- 0.11 mEq/dl, P < 0.001) and TAG (65 +/- 11 vs 102 +/- 16 mg/dl, P < 0.01), in the absence of liver steatosis or lactic acidosis. SREBP1c was down-regulated in PEPCK-silenced animals, suggesting a role for this pathway in the alterations of lipid metabolism. These data reinforce the significance of PEPCK in sustaining diabetes-induced hyperglycemia and validate liver-specific intervention at the level of PEPCK for diabetes gene therapy." @default.
- W2076397765 created "2016-06-24" @default.
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- W2076397765 date "2006-02-01" @default.
- W2076397765 modified "2023-10-09" @default.
- W2076397765 title "Overcoming Diabetes-Induced Hyperglycemia through Inhibition of Hepatic Phosphoenolpyruvate Carboxykinase (GTP) with RNAi" @default.
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- W2076397765 doi "https://doi.org/10.1016/j.ymthe.2005.08.026" @default.
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