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Transcription profiling of human native lipoprotein-stimulated THP-1 macrophages

ABSTRACT: We previously found that a native lipoprotein mix with a high VLDL+LDL/HDL ratio causes a global de novoDNA methylation in THP-1 macrophages. In the present experiment we assessed the consequences of global lipoprotein-induced de novo DNA methylation on global gene expression in the same cells. Moreover, we sought to use gene expression array data to measure RNA expression levels for candidate factors mediating the epigenetic effects of lipoproteins. Experiment Overall Design: Human native VLDL, LDL and HDL lipoproteins were isolated from buffy coats, fractionated by ultracentrifugation, stored at -80deg., desalted to PBS before usage and kept at 4deg. for a maximum of 7d. THP-1 monocytes were differentiated to macrophages, stimulated for 24h with a mix of 68.8mg/ml VLDL, 32.1mg/ml LDL, 91.1mg/ml HDL or unstimulated (control), in serum-free medium with 2% BSA. Three independently isolated lipoprotein samples were used in triplicate.

ORGANISM(S): Homo sapiens

SUBMITTER: Silvio Zaina

PROVIDER: E-GEOD-9101 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Expression data in native lipoprotein-stimulated human THP-1 macrophages

Project description:We previously found that a native lipoprotein mix with a high VLDL+LDL/HDL ratio causes a global de novoDNA methylation in THP-1 macrophages. In the present experiment we assessed the consequences of global lipoprotein-induced de novo DNA methylation on global gene expression in the same cells. Moreover, we sought to use gene expression array data to measure RNA expression levels for candidate factors mediating the epigenetic effects of lipoproteins. Keywords: comparison treated vs. control

2007-09-19 | GSE9101 | GEO

Lipoprotein profiles of human serum and golden hamster plasma

Project description:The lipoproteins of human serum and golden hamster plasma were deeper profiled by label-free proteomics and the shared proteins in lipoprotein particles from humans and golden hamsters were highlighted. The dynamic shared protein compositions of VLDL, LDL, and HDL from golden hamster plasma under normal and hyperlipidemic states were confirmed and compared by parallel reaction monitoring (PRM)-based targeted proteomics. This study was aimed to determine the relationship between the protein heterogeneity and functions of the three lipoproteins under normal conditions and explore the functional implication of protein dynamic change during the hyperlipidemic state.

2020-08-18 | PXD020963 |

Quantitative profiling of endocannabinoids in lipoproteins by LC–MS/MS

Project description:Endocannabinoids belong to a diverse family of endogenous lipid bioregulators acting as physiological ligands of cannabinoid receptor type 1 and cannabinoid receptor type 2 in the central and peripheral nervous system. They are also present in nmol/l concentrations in human blood plasma; however, their association with possible molecular carriers remains poorly characterized. Here we report on the quantification of 46 endogenous molecular species from five major classes of endocannabinoids and endocannabinoid-related compounds in three lipoprotein fractions of human blood plasma: (VLDL), LDL, HDL, and in the plasma lipoproteinfree fraction. Although sizable quantities of endocannabinoid related molecules are associated with lipoproteins, we identified the lipoprotein-free fraction as a major carrier of endocannabinoids in blood circulation with the exception of 2-acylglycerols, which are markedly abundant in VLDL.

2015-03-11 | MTBLS163 | MetaboLights

MicroRNAs are Transported in Plasma and Delivered to Recipient Cells by High-Density Lipoproteins (Human exosome, LDL, and HDL miRNA Signatures)

Project description:Circulating microRNAs (miRNA) are relatively stable in plasma and are a new class of disease biomarkers. Here we present evidence that human high-density lipoprotein (HDL) transports endogenous miRNAs and delivers them to recipient cells with functional targeting capabilities. Highly-purified fractions of human HDL contain small RNAs, and the HDL-miRNA profile from normal subjects is significantly different than familial hypercholesterolemia subjects. miRNAs were demonstrated to associate with both native and reconstituted HDL particles, and reconstituted HDL injected into mice retrieved distinct miRNA profiles from normal and atherogenic models. Cellular export of miRNAs to HDL was demonstrated to be regulated by neutral sphingomyelinase. HDL-mediated delivery of miRNAs to recipient cells was demonstrated to be scavenger receptor BI-dependent. Furthermore, HDL delivery of both exogenous and endogenous miRNAs resulted in the direct targeting of mRNA reporters. Notably, HDL-miRNA from atherosclerotic subjects induced differential gene expression, with significant loss of conserved mRNA targets in cultured hepatocytes. Collectively, these observations suggest that HDL participates in a novel mechanism of intercellular communication involving the transport and delivery of miRNAs. Human exosome, LDL, and HDL miRNA Signatures Profiled miRNA signatures from exosome, LDL, HDL in same subject

2011-03-23 | E-GEOD-25149 | biostudies-arrayexpress

MicroRNAs are Transported in Plasma and Delivered to Recipient Cells by High-Density Lipoproteins

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2011-04-03 | E-GEOD-25425 | biostudies-arrayexpress

Cross-linking mass spectrometry uncovers interactions between high-density lipoproteins and the SARS-CoV-2 spike glycoprotein

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2023-07-20 | PXD036640 | Pride

Cross-linking mass spectrometry uncovers interactions between high-density lipoproteins and the SARS-CoV-2 spike glycoprotein

2023-07-20 | PXD042625 | Pride

Cross-linking mass spectrometry uncovers interactions between high-density lipoproteins and the SARS-CoV-2 spike glycoprotein

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Cross-linking mass spectrometry uncovers interactions between high-density lipoproteins and the SARS-CoV-2 spike glycoprotein

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