Acetyl-coenzyme a carboxylase 2 as a target in fat...

C - Chemistry – Metallurgy – 12 – N

Patent

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C12N 9/00 (2006.01) A01K 67/027 (2006.01) A61K 38/43 (2006.01) A61K 39/395 (2006.01) A61K 45/00 (2006.01) A61P 3/04 (2006.01) A61P 3/06 (2006.01) A61P 3/10 (2006.01) C12N 5/10 (2006.01) C12P 21/00 (2006.01) C12P 21/08 (2006.01) C12Q 1/00 (2006.01) C12Q 1/02 (2006.01) G01N 33/50 (2006.01)

Patent

CA 2432415

The present invention highlights the role of acetyl-CoA carboxylase through its product malonyl-CoA in regulating fatty acid oxidation and synthesis, glucose metabolism and energy homeostasis. It discloses transgenic mice with inactivating mutations in the endogenous gene for the acetyl-CoA carboxylase 2 isoform of acetyl-CoA caboxylase. Inactivation of acetyl-CoA caroxylase 2 results in mice exhibiting a phenotype of reduced malonyl-CoA levels in skeletal muscle and heart, unrestricted fat oxidation, and reduced fat accumulation in the liver and fat storage cells. As a result, the mice consume more food but accumulate less fat and remain leaner than wild-type mice fed the same diet. These results demonstrate that inhibition of ACC2 acetyl-CoA carboxylase could be used to regulate fat oxidation and accumulation for purposes of weight control. The instant invention provides a useful animal model to regulate malonyl-CoA production by ACC2 in the regulation of fatty acid oxidation by muscle, heart, liver and other tissues. They also identify potential inhibitors for studying the mechanisms of fat metabolism and weight control.

L'invention concerne le rôle de l'acétyl-CoA carboxylase, via son produit le malonyl-CoA, dans la régulation de l'oxydation et de la synthèse des acides gras, le métabolisme du glucose et l'homéostasie de l'énergie. L'invention concerne également des souris transgéniques comportant, dans le gène endogène, des mutations inactivantes vis à vis de l'isoforme d'acétyl-CoA carboxylase 2 de l'acétyl-CoA caboxylase. L'inactivation de l'acétyl-CoA carboxylase 2 entraîne l'apparition, chez les souris, d'un phénotype à taux réduit en malonyl-CoA dans les muscles squelettiques et le coeur, l'oxydation non restreinte de graisses, et le stockage réduit de graisses dans le foie et les cellules de stockage de graisses. Par conséquent, les souris consomment plus d'aliments mais stockent moins de graisses et demeurent plus maigres que les souris de type sauvage soumises au même régime alimentaire. Ces résultats démontrent que l'inhibition de ACC2 acétyl-CoA carboxylase peut être utilisée pour réguler l'oxydation et le stockage de graisses à des fins de contrôle du poids. Par ailleurs, l'invention concerne un modèle animal utilisé pour réguler la production de malonyl-CoA par ACC2 dans la régulation de l'oxydation d'acides gras dans les muscles, le coeur, le foie et d'autres tissus. L'invention identifie également les inhibiteurs potentiels permettant d'étudier les mécanismes du métabolisme des graisses et du contrôle du poids.

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