Proteomics

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Proteomic and phosphoproteomic characterization of steatotic liver from diet-induced obese mice in response to dietary fat


ABSTRACT: One of the metabolic consequences of obesity is abnormal lipid accumulation in the liver, or hepatosteatosis, which can develop intomore serious diseases in the non-alcoholic liver disease (NAFLD) spectrum including non-alcoholic steatohepatitis (NASH) and hepatocellular carcinoma. Therefore, it is necessary to understand the metabolic changes that occur in hepatosteatosisin order toprevent disease progression.The liver plays a major role in regulating macronutrient and energy homeostasis in both the fed and fasted states. However, whether hepatosteatosis influences thepostprandial molecularresponse, specifically to dietary fat,has not been investigated.Therefore, the goal of this study was to comparethe proteome and phosphoproteome of steatotic livers from diet-induced obese (DIO) mice and control livers from lean mice in the postprandial response to dietary fat. Using untargeted LC-MS/MS analysis, we identified significant alterations in the levels of proteins involved in macronutrient and energy metabolism in livers of DIO compared to lean mice. In addition, uniquely phosphorylated proteins in livers of DIO andlean mice reflect regulatory mechanisms controlling cellular processes contributingto hepatosteatosis. Theresultsof this studyexpandourknowledge ofthe metabolic consequences that occur duringhepatosteatosisandtheinfluence of dietary fat on NAFLD progression.

INSTRUMENT(S): Orbitrap Fusion Lumos, Q Exactive HF

ORGANISM(S): Mus Musculus (ncbitaxon:10090)

SUBMITTER: Uma K Aryal  

PROVIDER: MSV000085612 | MassIVE | Fri Jun 19 12:08:00 BST 2020

REPOSITORIES: MassIVE

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