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CLIC4 is essential for host competence for metastasis in murine models of breast cancer and a prognostic indicator for human breast cancer

ABSTRACT: CLIC4 is essential for host competence for metastasis in murine models of breast cancer and a prognostic indicator for human breast cancer

PROVIDER: PRJNA591906 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR10534637_1.fastq.gz	Fastqsanger.gz
	SRR10534637_2.fastq.gz	Fastqsanger.gz
	SRR10534638_1.fastq.gz	Fastqsanger.gz
	SRR10534638_2.fastq.gz	Fastqsanger.gz
	SRR10534639_1.fastq.gz	Fastqsanger.gz

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CLIC4 is essential for host competence for metastasis in murine models of breast cancer and a prognostic indicator for human breast cancer

Project description:CLIC4 belongs to a family of highly conserved metamorphic proteins of the glutathione‐S‐transferase superfamily and dysregulation is implicated in pulmonary arterial hypertension, asthma, and ovarian cancer. We show that genetic ablation of host Clic4 eliminated the establishment of breast cancer lung metastases in two independent mouse models while Clic4 null tumor cells retained metastatic capability. TCGA and METABRIC data indicated that CLIC4 is elevated in human breast cancers from young women, those with poor prognosis and those with early stage metastatic disease. Experimentally, the essential Clic4 host contributions for metastatic competence depended on circulating levels of pro‐ metastatic mediators, neoangiogenesis, tumor cell attachment to lung tissue, myofibroblast differentiation, and leukocyte migration. CLIC4 was abundant in circulating extracellular vesicles (EVs) from tumor‐bearing wildtype mice but absent in EVs from tumor‐bearing Clic4 null hosts or wildtype hosts bearing Clic4 null‐tumors suggesting cross‐talk between host and tumor cells is required to deposit CLIC4 in EVs. These results illuminate CLIC4 as a critical host factor for metastatic competence, a potential prognostic marker for breast cancer patients and a target for anti‐metastatic therapy.

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Host CLIC4 is essential for breast cancer metastatic competence

Project description:Chloride Intracellular Channel 4 (CLIC4) expression is elevated in the stroma of many cancers. We show that CLIC4 expression is higher in breast cancers from younger women and early stage metastatic disease, portends poor prognosis, and is linked to TGF-β expression. Two murine breast cancer models with lung metastases revealed that ablation of host Clic4 nearly eliminated lung metastases without reducing primary tumor size while Clic4 null tumor cells retained metastatic capability. Thus, CLIC4 is required for host metastatic competence. Deficiencies in circulating pro-metastatic soluble factors were detected in CLIC4 deficient hosts bearing primary tumors. Necrosis and vascular abnormalities were more abundant in primary tumors from CLIC4 deficient hosts than from CLIC4 proficient control hosts. Transcriptional profiles of lungs and primary tumors prior to the onset of metastases indicated that loss of host CLIC4 enhances an inflammatory microenvironment. Thus, CLIC4 expression in human breast cancers may serve as a prognostic biomarker, and targeting host CLIC4 could reduce metastatic competence.

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