Hepatic stellate cells regulate liver fatty acid utilization via plasmalemma vesicle-associated protein
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ABSTRACT:
PROVIDER: PRJNA1031260 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR26483733_1.fastq.gz | Fastqsanger.gz | |||
| SRR26483733_2.fastq.gz | Fastqsanger.gz | |||
| SRR26483734_1.fastq.gz | Fastqsanger.gz | |||
| SRR26483734_2.fastq.gz | Fastqsanger.gz | |||
| SRR26483735_1.fastq.gz | Fastqsanger.gz |
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Project description:This SuperSeries is composed of the SubSeries listed below. Summary: The liver is essential for normal fatty acid utilization during fasting. Circulating fatty acids are taken up by hepatocytes and esterified as triacylglycerols for either oxidative metabolization and ketogenesis or export. Whereas the regulation of fatty acid oxidation in hepatocytes is well understood, the uptake and retention of non-esterified fatty acids by hepatocytes is not. Here, we show that murine hepatic stellate cells (HSCs) and their abundantly expressed plasmalemma vesicle-associated protein (PLVAP) control hepatic substrate preference for fasting energy metabolism. HSC-specific ablation of PLVAP in mice elevated hepatic insulin signaling and improved glucose tolerance. Fasted HSC PLVAP knockout mice showed suppressed hepatic fatty acid esterification to di- and triacylglycerols shifting fasting metabolism from fatty acid oxidation to reliance on carbohydrates. By super-resolution microscopy we localized HSC PLVAP to caveolae residing along the sinusoidal lumen supporting a role for HSCs and PLVAP-diaphragmed caveolae in normal fasting metabolism of the liver.
2025-03-04 | GSE246088 | GEO
Project description:The liver is essential for normal fatty acid utilization during fasting. Circulating fatty acids are taken up by hepatocytes and esterified as triacylglycerols for either oxidative metabolization and ketogenesis or export. Whereas the regulation of fatty acid oxidation in hepatocytes is well understood, the uptake and retention of non-esterified fatty acids by hepatocytes is not. Here, we show that murine hepatic stellate cells (HSCs) and their abundantly expressed plasmalemma vesicle-associated protein (PLVAP) control hepatic substrate preference for fasting energy metabolism. HSC-specific ablation of PLVAP in mice elevated hepatic insulin signaling and improved glucose tolerance. Fasted HSC PLVAP knockout mice showed suppressed hepatic fatty acid esterification to di- and triacylglycerols shifting fasting metabolism from fatty acid oxidation to reliance on carbohydrates. By super-resolution microscopy we localized HSC PLVAP to caveolae residing along the sinusoidal lumen supporting a role for HSCs and PLVAP-diaphragmed caveolae in normal fasting metabolism of the liver.
2025-03-04 | GSE246087 | GEO
Project description:The liver is essential for normal fatty acid utilization during fasting. Circulating fatty acids are taken up by hepatocytes and esterified as triacylglycerols for either oxidative metabolization and ketogenesis or export. Whereas the regulation of fatty acid oxidation in hepatocytes is well understood, the uptake and retention of non-esterified fatty acids by hepatocytes is not. Here, we show that murine hepatic stellate cells (HSCs) and their abundantly expressed plasmalemma vesicle-associated protein (PLVAP) control hepatic substrate preference for fasting energy metabolism. HSC-specific ablation of PLVAP in mice elevated hepatic insulin signaling and improved glucose tolerance. Fasted HSC PLVAP knockout mice showed suppressed hepatic fatty acid esterification to di- and triacylglycerols shifting fasting metabolism from fatty acid oxidation to reliance on carbohydrates. By super-resolution microscopy we localized HSC PLVAP to caveolae residing along the sinusoidal lumen supporting a role for HSCs and PLVAP-diaphragmed caveolae in normal fasting metabolism of the liver.
2025-03-04 | GSE246086 | GEO
Project description:The liver is essential for fatty acid utilization during fasting. Fatty acids released by lipolysis from adipose tissue during fasting are taken up from the blood by hepatocytes and esterified as triacylglycerols for oxidative metabolization and ketogenesis. Whereas the regulation of fatty acid oxidation in hepatocytes is well understood, transport of non-esterified fatty acids (NEFAs) from the liver sinusoidal lumen to the hepatocyte is not. Here, we show that murine hepatic stellate cells (HSCs), enveloping the liver sinusoids as pericytes, and their abundantly expressed plasmalemma vesicle-associated protein (PLVAP) control hepatic NEFA uptake during fasting. HSC-specific ablation of PLVAP suppresses hepatocyte fatty acid esterification to di- and triacylglycerols along with fasting fatty acid utilization and ketogenesis. Consistently, single cell-resolved transcriptomics further revealed severe perturbation of hepatocyte gene programs governing normal fatty acid handling, oxidation, and ketogenesis. By super-resolution microscopy we localized HSC PLVAP to caveolae residing along the sinusoidal lumen strongly supporting a role for PLVAP in caveolar transcytosis of NEFAs across HSCs and hence the sinusoid wall as rate-limiting for hepatic fatty acid utilization during fasting. This was supported by a similar decline in neutral lipid droplet formation in livers of fasting Caveolin-1 knockout mice. Altogether, our study shows vital roles for PLVAP and for HSCs in normal fasting metabolism of liver.
2025-03-07 | PXD046745 | Pride
Project description:Hepatic stellate cells regulate liver fatty acid utilization via plasmalemma vesicle-associated protein [snRNA-seq]
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Project description:Hepatic stellate cells regulate liver fatty acid utilization via plasmalemma vesicle-associated protein [bulk RNA-seq]
| PRJNA1031256 | ENA
Project description:Hepatic stellate cell autophagy inhibits extracellular vesicle release to attenuate liver fibrosis. Primary human hepatic stellate cells were treated with PDGF or PDGF + SHP2 inhibitor. RNA was purified and submitted for sequencing to Mayo Clinic Genomics Core. After applying the filters FDR>0.05, Log2(FC)>1 and RPKM>15, we ended up with nearly 300 genes differentially regulated between the two conditions. Ingenuity Pathway Analysis revealed that Ostheoarthritis was the first pathway to be differentially regulated. From this pathway, REDD1 (DDIT4 transcript), an mTOR inhibitor, was further explored, especially in the context of extracellular vesicle release.
2019-11-08 | GSE140110 | GEO
Project description:Gene expression of mouse hepatic stellate cells was characterized under the following conditions: Quiescent (isolated from normal mouse liver) and reverted (isolated from mouse liver treated with 4 injections of carbontetrachloride followed by 45 day rest period) Affymetrix Mouse 1.0ST gene expression measurements were used to characterize the transcriptomic basis in quiescent hepatic stellate cells, isolated from normal liver, and reverted hepatic stellate cells, isolated from liver treated with 4 injections of CCl4 followed by a 45 day rest period. Gene expression of mouse hepatic stellate cells was characterized under the following conditions: A. Quiescent control hepatic stellate cells (n=4). B. Reverted hepatic stellate cells (n=4).
2014-05-05 | E-GEOD-38648 | biostudies-arrayexpress
Project description:Background & Aims: Rapid induction of beta-PDGF receptor (beta-PDGFR) is a core feature of hepatic stellate cell activation, the hallmark of liver fibrogenesis. However, biological consequences of the induction are not well characterized. We aimed to determine the involvement of beta-PDGFR-mediated molecular pathway activation on hepatic stellate cells in liver injury, fibrogenesis, and carcinogenesis in vivo. Methods: Loss and constitutive activation of beta-PDGFR were assessed in mouse models with either a stellate cell-specific beta-PDGFR knockout or the expression of an autoactivating mutation respectively. Liver injury and fibrosis were induced in two mechanistically distinct models: carbontetrachloride (CCl4) treatment and ligation of the common bile duct. Hepatocarcinogenesis with underlying liver injury/fibrosis was assessed by a single dose of diethylnitrosamine (DEN) followed by repeated injections of CCl4. Genome-wide expression profiling was performed isolated stellate cells from these models to determine deregulated pathways. Results: Depletion of beta-PDGFR in hepatic stellate cells led to decreased histological liver injury, serum transaminases, collagen alpha 1(I) and alpha smooth muscle actin expression, and collagen deposition. Stellate cell proliferation was significantly reduced after acute hepatic injury in vivo. In contrast, autoactivation of beta-PDGFR in stellate cells accelerated liver fibrosis, most prominently after 6 weeks of CCl4 induced injury. There was no difference in development of DEN-induced pre-neoplastic loci according to the status of beta-PDGFR. Conclusions: Depletion of beta-PDGFR in hepatic stellate cells attenuated the development of liver injury, fibrosis, and stellate cell proliferation in multiple animal models, whereas the constitutive activation of beta-PDGFR enhanced fibrosis. However, manipulation of beta-PDGFR alone did not reduce development of dysplastic nodules. These findings indicate that titration of receptor beta-PDGFR expression on stellate cells parallels fibrosis and injury, but may not impact the development of hepatic neoplasia alone. Hepatic stellate cells were isolated from liver of beta-PDGFR-wild-type or knockout mice, and treated with beta-PDGF ligand or vehicle control.
2015-02-19 | E-GEOD-52253 | biostudies-arrayexpress
Project description:Analysis of hepatic stellate cells isoltaed from wild-type, TLR4-/-, and CD44-/- mice. TLR4 and CD44 are major hyaluronic acid receptors. Results provide insight into the effects of TLR4 and CD44 loss in hepatic stellate cells.
2020-01-01 | GSE109200 | GEO