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

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

PROVIDER: PRJNA748893 | ENA |

REPOSITORIES: ENA

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

Project description: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.

2021-11-14 | GSE180618 | GEO

Identification of novel markers for malignant pleural mesothelioma diagnosis

Project description:Diagnosis of malignant pleural mesothelioma (MPM) is difficult, the most common differential diagnosis being benign pleural diseases and metastatic adenocarcinomas. In order to identify novel markers able to improve diagnostic accuracy, we performed a genome-wide gene expression analysis on tumor cells lines established from pleural effusions (13 MPM and 4 lung adenocarcinoma). Our microarray analysis led to the identification of genes encoding novel cellular and soluble markers whose expression was validated by RT-qPCR. Immunohistochemical staining of tumor biopsies with anti-type-III collagen antibodies were positive in mesothelioma cells but not in adenocarcinoma cells. Using ELISA, we showed that the C-C motif chemokine 2 (CCL2) concentration was significantly higher in pleural effusions from patients with mesothelioma (n = 61) than in subjects with adenocarcinoma (n = 25) or with benign pleural effusions (n = 15): median (interquartile range) = 2.99 ng/mL (1.76-6.01) versus 0.99 ng/mL (0.51-1.83) and 1.47 ng/mL (0.80-1.56), respectively, P < 0.0001. Conversely, the galectin-3 concentration was lower in mesothelioma: 11.50 ng/mL (6.73-23.53) versus 24.74 ng/mL (20.42-70.35) and 17.64 ng/mL (14.81-24.68), respectively, P < 0.0001. The AUC for CCL2 were 0.8030 and 0.7716 for differentiating mesothelioma from adenocarcinoma or benign effusions, respectively. Similarly, the AUC obtained for galectin-3 were 0.7980 and 0.6923, respectively. In conclusion, type-III collagen, CCL2 and galectin-3 are promising new diagnostic markers for mesothelioma.

2009-07-25 | GSE17310 | GEO

Intrapleural BG00001 in Treating Patients With Malignant Pleural Mesothelioma or Malignant Pleural Effusions

Project description:RATIONALE: Using BG00001 to insert the gene for interferon-beta into a person’s pleural cavity may improve the body’s ability to fight cancer. PURPOSE: Phase I trial to study the effectiveness of intrapleural BG00001 in treating patients who have malignant pleural mesothelioma or malignant pleural effusions.

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Transcription profiling of human pleural mesothelioma versus parietal and visceral pleura

Project description:Genome-wide profile of pleural mesothelioma versus parietal and visceral pleura

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Chromosomal aberration of malignant pleural mesothelioma cell lines

Project description:To identify regions that display DNA copy number alterations in malignant pleural mesothelioma (MPM), we carried out array comparative genomic hybridization (CGH) analysis with 14 MPM cell lines. Regions of genomic aberrations observed in >20% of individuals were 9p21.3, 13q12.11, 16p13, and 22q12.2 of losses. The most frequent alteration was 9p21.3, which include the p16INK4/p14ARF. The loss of 22q12.2 regions include the NF2 was observed in 3 out of 14 cell lines. In 3 cell lines, loss of 13q12.11 region which contains Large Tumor Suppressor, homolog 2 (LATS2) was detected. Human malignant pleural mesothelioma cell lines were profiled on Agilent 244K aCGH arrays according to manufacturer’s instructions. Pooled normal human genomic DNA was used as the reference.

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Affymetrix OncoScan FFPE Microarray data for Malignant Pleural Mesothelioma Samples

Project description:For establishing a live-cell biobank of Malignant Pleural Mesothelioma (MPM) samples, cultures of two MPM patients were compared to the original tumor tissue using Affymetrix OncoScan Microarrays for genome-wide CNV and LOH detection.

2018-01-18 | GSE109305 | GEO

Gene Expression of Malignant Pleural Mesothelioma Tumor and paired Normal Lung tissue

Project description:In order to discover critical pathways /networks or therapeutic targets in pleural mesothelioma we profiled 55 tumors along with paired normal tissue (for 41 tumors) using Affymetrix U133 plus 2.0 chips

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Genotyping of Malignant Pleural Mesothelioma primary cell lines by SNP array

Project description:SNP array data from 45 cell lines of Malignant Pleural Mesothelioma were used to explore recurrent copy number alterations. This study was part of Cartes d'Identité des Tumeurs (CIT) project from the french Ligue Nationale Contre le Cancer.

2023-12-31 | GSE197288 | GEO

DNA methylation profiling of malignant pleural mesothelioma

Project description:DNA methylation profiling of malignant pleural mesothelioma

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Copy number variations analysis by CytoscanHD array of 33 human pleural mesothelioma cell lines

Project description:We performed a cytoscanHD array to analyze copy number variations in the genome of 33 human pleural mesothelioma cell lines established from patient pleural effusion. We were particularly interested in the analysis of the p21.3 region of chromosome 9 which contains CDKN2A tumor suppressor genes and the gene encoding type I interferons that are often deleted and confer sensitivity to oncolytic Measles virus

2019-07-17 | GSE134349 | GEO

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