Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

PPARα and PPARγ activation is associated with pleural mesothelioma invasion, but therapeutic inhibition is ineffective in preclinical models

ABSTRACT: Mesothelioma is a cancer that typically originates in the pleura of the lungs. It rapidly invades the surrounding tissues, resulting in pain and shortness of breath. We compared mesothelioma cell lines that were injected either subcutaneously or intrapleurally and found that only the latter resulted in invasive and rapid growth. Pleural tumours displayed a transcriptional signature consistent with increased activity of nuclear receptorsPPARα and PPARγ and with an increased abundance of endogenous PPAR-activating ligands. We found that chemical probe GW6471 is a potent dual PPARα/γ antagonist with anti-invasive and anti-proliferative activity in vitro. However, administration of GW6471 at doses that provided sustained plasma exposure levels sufficient for inhibition of PPARα/γ transcriptional activity did not result in significant anti-mesothelioma activity in mice. Lastly, we demonstrate that the in vitro antitumour effect of GW6471 is off-target. We conclude that dual PPARα/γ antagonism alone is not a viable treatment modality for mesothelioma.

ORGANISM(S): Mus musculus

PROVIDER: GSE180618 | GEO | 2021/11/14

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
		Other

Items per page:

1 - 1 of 1

Similar Datasets

RNA-Seq of liver from CLA-exposed mice with/without PPARα antagonist

Project description:We demonstrate that conjugated linoleic acid (CLA), when given to mice as a dietary supplement, induced an enlarged liver and hepatic steatosis. The progression of NAFLD and insulin resistance was reversed by GW6471 a small-molecule antagonist of PPARα. Transcriptional profiling of livers unraveled that genes involved in lipid metabolism core gene programs controlled by PPARα in response to CLA and GW6471.Our findings reveal a novel role of PPARα in the regulation of lipid homeostasis and highlight its druggable nature in NAFLD.

2021-08-27 | GSE159219 | GEO

Next Generation Sequencing Analysis of Pparafl/fl and PparaΔIE intestinal transcriptomes

Project description:Nonalcoholic fatty liver disease (NAFLD) is one of the most common chronic diseases globally and nonalcoholic steatohepatitis is its progressive stage with limited therapeutic options. Here a role for intestinal peroxisome proliferator-activated receptor α (PPARα)-fatty acid binding protein 1 (FABP1) in obesity-associated metabolic syndrome, fatty liver and nonalcoholic steatohepatitis via modulating dietary fat absorption was uncovered. Intestinal PPARα is highly activated accompanied by marked upregulation of FABP1 by high-fat diet (HFD) in mice and obese humans. Intestine-specific PPARα or FABP1 disruption in mice decreases HFD-induced obesity, fatty liver and nonalcoholic steatohepatitis and intestinal PPARα disruption fails to further decrease obesity and NASH. Chemical PPARα antagonism improves metabolic disorders depending on the presence of intestinal PPARα or FABP1. Translationally, GW6471 decreases human PPARα-driven intestinal fatty acid uptake and therapeutically improves obesity in PPARA-humanized, but not Ppara-null, mice. These results suggest that intestinal PPARα-FABP1 axis could be a therapeutic target for NASH.

2022-09-01 | GSE190140 | GEO

RNA-seq data from human SGBS adipocytes differentiated with marine oxohexadecenoic acids

Project description:We recently isolated and identified (7E)-9-oxohexadec-7-enoic acid (1) and (10E)-9-oxohexadec-10-enoic acid (2) from the marine algae Chaetoceros karianus. Synthesis and biological characterization show that these are PPARα/γ dual agonists. Herein we report the gene expression data from human SGBS pre-adipocytes, stimulated to differentiate with 1, 2 or the classical PPARγ agonist rosiglitazone. The transcriptome analysis shows that both compounds induce anti-diabetic gene programs in adipocytes by upregulating insulin-sensitizing adipokines and repressing pro-inflammatory cytokines.

2018-06-26 | GSE115827 | GEO

Comprehensive kinase activity assay of desmoplastic malignant mesothelioma

Project description:Desmoplastic malignant mesothelioma is a rare tumor. Due to the rarity, development of new treatment for desmoplastic malignant mesothelioma is difficult. To develop new treatment strategy using existing anti-cancer drugs, kinase activity profiling has not been thoroughly studied. We used PamChip array to identify the peptide profiles of desmoplastic malignant mesothelioma between the patient-derived cell line and the tumor tissue.

2021-10-01 | GSE185107 | GEO

PPARα and PPARγ activation is associated with pleural mesothelioma invasion, but therapeutic inhibition is ineffective in preclinical models

Project description:PPARα and PPARγ activation is associated with pleural mesothelioma invasion, but therapeutic inhibition is ineffective in preclinical models

| PRJNA748893 | ENA

The nuclear receptors ERRα and PPARα co-ordinately control starvation-induced gene expression in hepatocytes.

Project description:Peroxisome-proliferator activated receptor α (PPARα) activation reprograms liver gene expression to support fatty acid oxidation during fasting. How PPARα engages in transcriptional programs coping with catabolic fasting responses is insufficiently understood. By applying a protein-protein interaction methodology that also captures transient interactions, we revealed the orphan nuclear receptor estrogen-related receptor α (ERRα) as a novel interaction partner of liganded PPARα and found that this interaction is enhanced following cellular nutrient starvation. Among target genes affected by PPARα-ERRα transcriptional crosstalk in fasted murine livers, multiple components of the electron transport chain were identified. Using pharmacological tools to study hepatic gene subsets under dual PPARα and ERRα control and moving from short-term to prolonged nutrient deprivation, we found that ERRα can switch from being a PPARα target gene suppressor to a marked PPARα target gene activator. Mechanistically, ERRα may control PPARα transcriptional activity via binding onto PPARα’s coactivator interaction site and via facilitating cofactor relays. In sum, a variety of crosstalk mechanisms between PPARα and ERRα seems to co-ordinately drive essential gene regulatory changes in the starving hepatocyte.

2024-04-01 | GSE200658 | GEO

The shared PPARα/γ target genes regulate brown adipocyte thermogenic function (ChIP-Seq)

Project description:We report the application of sequencing technology for high-throughput profiling of PPARα/γ in mammalian cells. By obtaining over 3 billion bases of sequence from chromatin immunoprecipitated DNA, we generated genome-wide chromatin-state maps of mouse brown adipose tissue. We find that PPARα binds to a subset of PPARγ sites, suggesting a potential redundancy in which PPARα function may not be necessary in brown adipose tissue.While PPARα may not itself be necessary for BAT function, shared targets regulation by PPARα and PPARγ may nonetheless reveal relevant biology in this tissue.This study provides a framework for the application of comprehensive chromatin profiling towards characterization of PPARα/γ regulation in mouse brown adipose tissue.

2020-01-30 | GSE144488 | GEO

The class 3 PI3K coordinates autophagy and mitochondrial lipid catabolism by controlling nuclear receptor PPARα

Project description:The class 3 phosphoinositide 3-kinase (PI3K) is required for the lysosomal degradation by autophagy and vesicular trafficking, assuring adaptation to energy shortages. Mitochondrial lipid catabolism is another important energy source. Autophagy and mitochondrial metabolism are transcriptionally controlled by nutrient sensing nuclear receptors. However, it is not known whether the class 3 PI3K contributes to this regulation. Here we show that hepatocyte-specific inactivation of Vps15, the essential regulatory subunit of the class 3 PI3K, results in mitochondrial depletion and a failure to oxidize fatty acids. Mechanistically, the transcriptional activity of Peroxisome Proliferator Activated Receptor alpha (PPARα), a nuclear receptor that orchestrates fatty acid catabolism, is blunted in Vps15-deficient livers. We find PPARα transcriptional repressors Histone Deacetylase 3 (Hdac3) and Nuclear receptor co-repressor 1 (NCoR1) accumulated in Vps15-deficient livers due to defective autophagic flux. Pharmacologic activation of PPARα with a synthetic ligand, re-expression of its co-activator Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha (PGC-1α) or inhibition of Hdac3 restored mitochondrial biogenesis and lipid oxidation in Vps15-deficient hepatocytes. These findings reveal a role for the class 3 PI3K and autophagy in transcriptional coordination of mitochondrial metabolism.

2020-02-06 | E-MTAB-7685 | biostudies-arrayexpress

Inactivation of p21-Activated Kinase 2 (Pak2) Inhibits the Development of Nf2-Deficient Tumors by Restricting Downstream Hedgehog and Wnt Signaling

Project description:Since loss of the NF2 tumor suppressor gene results in p21-activated kinase (Pak) activation, PAK inhibitors hold promise for the treatment of NF2-deficient tumors. To test this possibility, we asked if loss of Pak2, a highly expressed group I PAK member, affects the development of malignant mesothelioma in Nf2;Cdkn2a-deficient (NC) mice and the growth properties of NC mesothelioma cells in culture. In vivo, deletion of Pak2 resulted in a markedly decreased incidence and delayed onset of both pleural and peritoneal malignant mesotheliomas in NC mice. In vitro, Pak2 deletion decreased malignant mesothelioma cell viability, migration, clonogenicity, and spheroid formation. RNA-seq analysis demonstrated downregulated expression of Hedgehog and Wnt pathway genes in NC;Pak2-/- mesothelioma cells versus NC;Pak2+/+ mesothelioma cells. Targeting of the Hedgehog signaling component Gli1 or its target gene Myc inhibited cell viability and spheroid formation in NC;P+/+ mesothelioma cells. Kinome profiling uncovered kinase changes indicative of EMT in NC;Pak2-/- mesothelioma cells, suggesting that Pak2-deficient malignant mesotheliomas can adapt by reprogramming their kinome in the absence of Pak activity. The identification of such compensatory pathways offers opportunities for rational combination therapies to circumvent resistance to anti-PAK drugs.

2023-03-10 | PXD030571 | Pride

Mesothelioma xenografts in nude mice: PBS treated versus pirfenidone treated

Project description:Background: Malignant mesothelioma is an aggressive cancer with poor prognosis. It is characterized by prominent extracellular matrix, mesenchymal tumor cell phenotypes and chemoresistance. In this study, the ability of pirfenidone to alter mesothelioma cell proliferation and migration as well as mesothelioma tumor microenvironment was evaluated. Pirfenidone is an anti-fibrotic drug used in the treatment of idiopathic pulmonary fibrosis and has also anti-proliferative activities. Aims: Transcriptional profiling using RNA sequencing of human mesothelioma xenograft tumors treated with PBS or pirfenidone. Aim was to compare extracellular matrix and fibrosis related genes. Results: Treatment of mice harboring mesothelioma xenografts with pirfenidone alone did not reduce tumor proliferation in vivo. However, pirfenidone modified the tumor microenvironment by reducing the expression of extracellular matrix associated genes. In addition, GREM1 expression was downregulated by pirfenidone in vivo. Conclusion: By reducing two major upregulated pathways in mesothelioma and by targeting tumor cells and the microenvironment pirfenidone may present a novel anti-fibrotic and anti-cancer adjuvant therapy for mesothelioma.

2018-12-14 | GSE113803 | GEO

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

Tweets

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data