Effect of fibulin-3 knockdown on malignant mesothelioma cells
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ABSTRACT:
PROVIDER: PRJNA553155 | ENA |
REPOSITORIES: ENA
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Project description:Whole transcriptome comparison of mesothelioma cells transfected with control vs Fibulin-3 (EFEMP1) siRNAs. Mesothelioma cells H-226 (ATCC) and H-2595 (Harvey Pass, New York University) were transfected with two fibulin-3 or control siRNAs and collected 48h after transfection. Gene expression was quantified by RNAseq using standard procedures. The results suggest that downregulation of fibulin-3 negatively affects a PI3K/AKT-dependent gene signature involved in cell growth, adhesion, and association with the extracellular matrix.
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Project description:Malignant Peritoneal Mesothelioma (PeM) is a rare but frequently fatal cancer that originates from the peritoneal lining of the abdomen. Standard treatment of PeM is limited to cytoreductive surgery and/or chemotherapy, and no targeted therapies for PeM yet exist. This study performs comprehensive integrative analysis of genome, transcriptome, and proteome of treatment-naïve PeM tumors with the aim of identifying mesothelioma-related molecular alterations and potentially identifying novel treatment strategies.
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Project description:Malignant mesothelioma (MM) is an asbestos-related malignancy and largely unresponsive to conventional chemotherapy or radiotherapy. Novel, more effective therapeutic strategies are needed for this fatal disease. We performed microarray analysis of MM using Affymetrix Human U133 Plus 2.0 array. Aberrant expression of the genes participating in semaphorin signaling were detected in malignant mesothelioma cells. All MM cells downregulated the expression of more than one gene for SEMA3B, 3F, and 3G when compared with Met5a, a normal pleura-derived cell line. In 12 of 14 epithelioid MM cells, the expression level of SEMA3A was lower than that in Met5a. An augmented expression of VEGFA was detected in half of the MM cells. The expression ratio of VEGFA/SEMA3A was significantly higher in the epithelioid MMs than in Met5a and the non-epithelioid MMs. Next, gene expression profiling for the polycomb and trithorax group genes revealed that expression of BAP1, the catalytic subunit of the polycomb repressive deubiquitinase complex, and many trithorax group genes was downregulated in MMs compared with the expression of the same genes in Met5a cells. Perturbation of the polycomb–trithorax balance plays a significant role in the pathogenesis of malignant mesothelioma.
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Project description:CD26 is a prognostic factor in many cancers and implicated as therapeutic target. Knockdown of CD26 on mesothelioma cells H226 and JMN inhibit tumor progression. In order to elucidate CD26-mediated pathway for tumor progression, CD26 was knocked down on H226 and JMN cells, and RNAs from these cells were subjected to Microarray analysis.
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Project description:Malignant mesothelioma (MM) is an asbestos-related malignancy. Discrimination between MM and reactive mesothelial hyperplasia (RM) is often difficult. MM cells have a broad histological spectrum, and consist mainly of epithelioid, sarcomatoid, and biphasic cell types. The prognosis of MM is generally poor, but better prognosis has been reported with the epithelioid type of MM than the non-epithelioid type. We applied a genome-wide analysis to the identification of new markers that may aid in differentiating the epithelioid type of MM from other histological types and from RM cells. Array-based comparative genomic hybridization analysis was performed on malignant mesothelioma (MM) primary cell cultures, reactive mesothelial hyperplasia (RM) primary cell cultures; early passage of in vitro primary cell cultures to minimize acquisition of additional genomic changes. If available, matched peripheral blood was applied to analysis.
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Project description:We investigate the dependence of human malignant mesothelioma on functional TEAD transcription factors to maintain fully established tumors in vivo. We show that TEAD inhibitor K-975 stops tumor growth in vivo, eventually causing tumor regression, by downregulating TEAD activity and altering, thus, TEAD-dependent transcription in a dysfunctional Hippo genetic background. Our data validate the concept of inhibiting an activated YAP1/TEAD complex for the treatment of malignant pleural mesothelioma patients.
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