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RNA-seq of tumor cells following angiopellosis extravasation

ABSTRACT: RNA-seq of tumor cells following angiopellosis extravasation

PROVIDER: PRJNA545897 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR9180330.fastq.gz	Fastqsanger.gz
	SRR9180331.fastq.gz	Fastqsanger.gz
	SRR9180332.fastq.gz	Fastqsanger.gz
	SRR9180333.fastq.gz	Fastqsanger.gz
	SRR9180324.fastq.gz	Fastqsanger.gz

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RNA-seq of tumor cells following angiopellosis extravasation

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Project description:Metastases, which largely rely on hematogenous dissemination of tumor cells via the vascular system, significantly limit prognosis of patients with solid tumors. To colonize distant sites, circulating tumor cells must destabilize the endothelial barrier and transmigrate across the vessel wall. Here we performed a high-content screen to identify drugs that block tumor cell extravasation by testing 3520 compounds on a transendothelial invasion co-culture assay. Hits were further characterized and validated using a series of in vitro assays, a zebrafish model enabling 3-D visualization of tumor cell extravasation, and mouse models of lung metastasis. The initial screen advanced 38 compounds as potential hits, of which 4 compounds enhanced endothelial barrier stability while concurrently suppressing tumor cell motility. Two compounds: niclosamide and forskolin, significantly reduced tumor cell extravasation in zebrafish and niclosamide drastically impaired metastasis in mice. Because niclosamide had not previously been linked with effects on barrier function, we performed single cell RNA sequencing to reveal mechanistic effects of the drug on both tumor and endothelial cells. Importantly, niclosamide affected homotypic and heterotypic signaling critical to intercellular junctions, cell-matrix interactions, and cytoskeletal regulation. Proteomic analysis indicated that niclosamide-treated mice also showed reduced levels of kininogen, the precursor to the permeability mediator bradykinin. Our findings designate niclosamide as an effective drug that restricts tumor cell extravasation through modulation of signaling pathways, chemokines, and tumor-endothelial cell interactions.

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