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AgRP Neurons Require Carnitine Acetyltransferase to Regulate Metabolic Flexibility and Peripheral Nutrient Partitioning
Abstract : AgRP neurons control peripheral substrate utilization and nutrient partitioning during conditions of energy deficit and nutrient replenishment, although the molecular mechanism is unknown. We examined whether carnitine acetyltransferase (Crat) in AgRP neurons affects peripheral nutrient partitioning. Crat deletion in AgRP neurons reduced food intake and feeding behavior and increased glycerol supply to the liver during fasting, as a gluconeogenic substrate, which was mediated by changes to sympathetic output and peripheral fatty acid metabolism in the liver. Crat deletion in AgRP neurons increased peripheral fatty acid substrate utilization and attenuated the switch to glucose utilization after refeeding, indicating altered nutrient partitioning. Proteomic analysis in AgRP neurons shows that Crat regulates protein acetylation and metabolic processing. Collectively, our studies highlight that AgRP neurons require Crat to provide the metabolic flexibility to optimize nutrient partitioning and regulate peripheral substrate utilization, particularly during fasting and refeeding.
https://hal-cnrs.archives-ouvertes.fr/hal-03105456
Contributor : Colette Orange Connect in order to contact the contributor
Submitted on : Monday, January 11, 2021 - 10:14:50 AM
Last modification on : Wednesday, July 28, 2021 - 9:57:57 AM
Contributor : Colette Orange Connect in order to contact the contributor
Submitted on : Monday, January 11, 2021 - 10:14:50 AM
Last modification on : Wednesday, July 28, 2021 - 9:57:57 AM
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