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Whole body Knockout of PC-TP (Pctp-/-), Hepatic whole RNAseq comparing Wild Type (WT) and knock out mic (KO) as well as Chow Fed and Methionine and choline depleted (MCD) fed mice.

ABSTRACT: Previous studies have used this model to show that PC-TP has a protective effect when challenged with a methionine and choline depleted diet, known to induce NAFLD. We performed transcription factor binding experiments and show that PPARs are dysregulated in the contect of PC-TP depletion We then performed gene expression profiling analysis using data obtained from RNA-seq of 3 Mice for WT and KO fed either normal chow or methionine and choline depleted chow.

ORGANISM(S): Mus musculus

PROVIDER: GSE224877 | GEO | 2023/02/12

REPOSITORIES: GEO

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Whole body Knockout of PC-TP (Pctp-/-), Hepatic whole RNAseq comparing Wild Type (WT) and knock out mic (KO) as well as Chow Fed and Methionine and choline depleted (MCD) fed mice.

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Project description:Phosphatidylcholine transfer protein (PC-TP, a.k.a StarD2) is abundantly expressed in liver and is regulated by PPARα. When fed the synthetic PPARα ligand fenofibrate, Pctp-/- mice exhibited altered lipid and glucose homeostasis. Microarray profiling of liver from fenofibrate fed wild type and Pctp-/- mice revealed differential expression of a broad array of metabolic genes, as well as their regulatory transcription factors. Because its expression controlled the transcriptional activities of both PPARα and HNF4α in cell culture, the broader impact of PC-TP on nutrient metabolism is most likely secondary to its role in fatty acid metabolism. 6 livers collected from PC-TP knockout mice fed a fenobrate-supplemented diet were used as the experimental group. 6 livers collected from wild type mice fed a fenofibrate-supplemented diet were used as the control group. RNA prepared from one liver was used to hybridize one GeneChip, so that there were 6 experimental GeneChips and 6 control GeneChips.

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Project description:This study aimed to investigate the effects and underlying mechanisms of sarsasapogenin (SAR) on dietary methionine choline deficiency induced non-alcoholic fatty liver disease in mice, The differentially expressed genes in liver tissue in “Normal VS model ”and “Model VS SAR” were identified by RNA-seq.

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Project description:Choline supplies methyl groups for regeneration of methionine and the methyl donor S-adenosylmethionine in the liver. Here we demonstrate that the catabolism of membrane phosphatidylcholine (PC) into water-soluble glycerophosphocholine (GPC) by the phospholipase/lysophospholipase PNPLA8-PNPLA7 axis enables endogenous choline stored in hepatic PC to be utilized in methyl metabolism. PNPLA7-deficient mice show marked decreases in hepatic GPC, choline, and several metabolites related to the methionine cycle, accompanied by various signs of methionine insufficiency including growth retardation, hypoglycemia, hypolipidemia, increased energy consumption, reduced adiposity, increased FGF21, and an altered epigenetic methylation landscape. Moreover, PNPLA8-deficient mice recapitulate most of these phenotypes. In contrast to wild-type mice fed a methionine/choline-deficient diet, both knockout strains display a decreased hepatic triglyceride likely via reductions of lipogenesis and GPC-derived glycerol flux. Collectively, our findings highlight the biological importance of phospholipid catabolism driven by PNPLA8/PNPLA7 in methyl group flux and triglyceride synthesis in the liver.

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Project description:Choline supplies methyl groups for regeneration of methionine and the methyl donor S-adenosylmethionine in the liver. Here we demonstrate that the catabolism of membrane phosphatidylcholine (PC) into water-soluble glycerophosphocholine (GPC) by the phospholipase/lysophospholipase PNPLA8-PNPLA7 axis enables endogenous choline stored in hepatic PC to be utilized in methyl metabolism. PNPLA7-deficient mice show marked decreases in hepatic GPC, choline, and several metabolites related to the methionine cycle, accompanied by various signs of methionine insufficiency including growth retardation, hypoglycemia, hypolipidemia, increased energy consumption, reduced adiposity, increased FGF21, and an altered histone/DNA methylation landscape. Moreover, PNPLA8-deficient mice recapitulate most of these phenotypes. In contrast to wild-type mice fed a methionine/choline-deficient diet, both knockout strains display a decreased hepatic triglyceride likely via reductions of lipogenesis and GPC-derived glycerol flux. Collectively, our findings highlight the biological importance of phospholipid catabolism driven by PNPLA8/PNPLA7 in methyl group flux and triglyceride synthesis in the liver.

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