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Sex differences in the expression and function of hepatic very low-density lipoprotein receptor during protein deficiency in mice

ABSTRACT: Sex differences in the expression and function of hepatic very low-density lipoprotein receptor during protein deficiency in mice

PROVIDER: PRJNA1080630 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR28100807_1.fastq.gz	Fastqsanger.gz
	SRR28100807_2.fastq.gz	Fastqsanger.gz
	SRR28100808_1.fastq.gz	Fastqsanger.gz
	SRR28100808_2.fastq.gz	Fastqsanger.gz
	SRR28100809_1.fastq.gz	Fastqsanger.gz

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Sex differences in the expression and function of hepatic very low-density lipoprotein receptor during protein deficiency in mice

Project description:Very low-density lipoprotein (VLDL) receptor (VLDLR), a member of the low-density lipoprotein receptor family, is responsible for VLDL uptake in peripheral tissues. We reported that significant increase in hepatic VLDLR levels following protein restriction in male mice does not contribute to hepatic fat accumulation, indicating that VLDLR may have hitherto unknown functions. Here, we used RNA-sequencing analysis of liver samples to analysis the effects of protein restriction on hepatic VLDLR in male and female mice.

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Project description:A sexually dimorphic hepatic cycle of very low density lipoprotein uptake and assembly

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A sexually dimorphic hepatic cycle of very low density lipoprotein uptake and assembly

Project description:Single-cell transcriptomes can reveal spatiotemporal programmes of liver function on the sublobular scale. However, how sexual dimorphism affects this space-time logic remains poorly understood. To address this, we performed single-cell RNA-seq in the mouse liver, which allowed us to model how lobular position, circadian time and sex shape the transcriptome.

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High-density lipoprotein subpopulation profiles in lipoprotein lipase and hepatic lipase deficiency.

Project description:Background and aimsOur aim was to gain insight into the role that lipoprotein lipase (LPL) and hepatic lipase (HL) plays in HDL metabolism and to better understand LPL- and HL-deficiency states.MethodsWe examined the apolipoprotein (apo) A-I-, A-II-, A-IV-, C-I-, C-III-, and E-containing HDL subpopulation profiles, assessed by native 2-dimensional gel-electrophoresis and immunoblotting, in 6 homozygous and 11 heterozygous LPL-deficient, 6 homozygous and 4 heterozygous HL-deficient, and 50 control subjects.ResultsLPL-deficient homozygotes had marked hypertriglyceridemia and significant decreases in LDL-C, HDL-C, and apoA-I. Their apoA-I-containing HDL subpopulation profile was shifted toward small HDL particles compared to controls. HL-deficient homozygotes had moderate hypertriglyceridemia, modest increases in LDL-C and HDL-C level, but normal apoA-I concentration. HL-deficient homozygotes had a unique distribution of apoA-I-containing HDL particles. The normally apoA-I:A-II, intermediate-size (α-2 and α-3) particles were significantly decreased, while the normally apoA-I only (very large α-1, small α-4, and very small preβ-1) particles were significantly elevated. In contrast to control subjects, the very large α-1 particles of HL-deficient homozygotes were enriched in apoA-II. Homozygous LPL- and HL-deficient subjects also had abnormal distributions of apo C-I, C-III, and E in HDL particles. Values for all measured parameters in LPL- and HL-deficient heterozygotes were closer to values measured in controls than in homozygotes.ConclusionsOur data are consistent with the concept that LPL is important for the maturation of small discoidal HDL particles into large spherical HDL particles, while HL is important for HDL remodeling of very large HDL particles into intermediate-size HDL particles.

| S-EPMC5064856 | biostudies-literature

Scd1 Knockout Mice on very low fat diet

Project description:Stearoyl-CoA desaturase 1-deficient (SCD1-/-) mice have impaired monounsaturated fatty acid (MUFA) synthesis. When maintained on a very low-fat, high-carbohydrate (VLF-HC) diet, SCD1-/- mice develop severe hypercholesterolemia characterized by an increase in apolipoprotein B-containing lipoproteins and the appearance of lipoprotein-X. Additionally, high-density lipoprotein cholesterol is dramatically reduced in VLF-HC SCD1-/- mice. The concomitant presence of elevated plasma bile acids, bilirubin and aminotransferases in the VLF-HC SCD1-/- mouse are indicative of hepatic dysfunction. Supplementation of the VLF-HC diet with unsaturated fat (canola oil), but not saturated fat (coconut oil), prevents these plasma phenotypes. However, dietary oleate was not as effective as canola oil in reducing low-density lipoprotein cholesterol, signifying an additional role for dietary polyunsaturated fatty acid deficiency in the development of this phenotype. These results indicate that lack of SCD1 results in an increased requirement for dietary unsaturated fat to compensate for impaired MUFA synthesis and to prevent hypercholesterolemia and hepatic dysfunction. Keywords: repeat (genotype and diet)

2005-12-23 | GSE3889 | GEO

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