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Mesothelioma xenografts in nude mice: PBS treated versus pirfenidone treated

ABSTRACT: Mesothelioma xenografts in nude mice: PBS treated versus pirfenidone treated

PROVIDER: PRJNA454010 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR7075030.fastq.gz	Fastqsanger.gz
	SRR7075031.fastq.gz	Fastqsanger.gz
	SRR7075032.fastq.gz	Fastqsanger.gz
	SRR7075033.fastq.gz	Fastqsanger.gz
	SRR7075026.fastq.gz	Fastqsanger.gz

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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.

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Project description:Idiopathic Pulmonary Fibrosis (IPF) is a progressive chronic lung disease characterized by excess deposition of extracellular matrix (ECM) proteins in the lung. TGFα is a is a ligand for the epidermal growth factor receptor, and found elevated in several fibrotic lung diseases including IPF. Notably, lung-specific overexpression of TGFα alone in adult mice can cause progressive and extensive adventitial and subpleural fibrosis similar to IPF. Pirfenidone, an FDA approved drug has been shown to improve the decline in lung function in IPF patients. However, the mechanism of action of pirfenidone largely unknown. In the current study, we investigated the effects of pirfenidone using a mouse model of TGFα-induced pulmonary fibrosis and fibroblasts isolated from IPF lungs. Total lung transcriptome analysis suggest a significant overlap in dysregulated gene transcripts between TGFα model and IPF. In vivo studies demonstrate a significant improvement in lung function with pirfenidone therapy compared to vehicle-treated TGFα mice on Dox for six wks. However, pirfenidone treatment did not affect fibroproliferation, myofibroblast transformation, and ECM deposition during TGFα-induced pulmonary fibrosis. In summary, pirfenidone treatment improved lung function but had a limited or no effect on the expression of collagen, ECM genes, fibroproliferation and migration of lung-resident fibroblasts.

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