Host CLIC4 is essential for breast cancer metastatic competence
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ABSTRACT:
PROVIDER: PRJNA767846 | ENA |
REPOSITORIES: ENA
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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.
2022-05-25 | GSE185163 | GEO
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.
2020-11-26 | GSE141057 | GEO
Project description:A polyclonal mouse model of breast tumor heterogeneity using model cell line 4T1 was developed previously. It was shown that 4T1 cells were composed of mixed subpopulations with specializations, including dominating the primary tumor, contributing to metastatic populations, etc. Here in a different angle, we reveal that each 4T1 cells can switch between 2 distinct states, which could be easily misclassified into 2 subpopulations, as the 2 states can be distinguished by distinct patterns of gene expression, dramatic difference of metastatic competence, stem-cell like feature or not, etc. The event for each 4T1 cell to exhibit one state or another is stochastic and the metastatic competence of clones generated from a single 4T1 cell is variable rather than stable. Further, given that metastatic competence of 4T1 cells is not stable, classification of clones based on metastatic competence is highly biased. Similarly, the classification of 4T1 clones based on gene expression profiles is also highly biased. Taken together, our data support that the exhibition of metastatic competence depends on the state of 4T1 cells and do not support the existence of subpopulations with specialization. To the best of our knowledge, no similar work has ever been reported.
2018-03-20 | GSE112038 | GEO
Project description:CLIC4 is essential for host competence for metastasis in murine models of breast cancer and a prognostic indicator for human breast cancer
| PRJNA591906 | ENA
Project description: Not available
| S-EPMC9249210 | biostudies-literature
Project description:Analysis of different proteomics profile in primary tumors of metastatic and non-metastatic breast cancers.
2023-03-09 | PXD037288 | Pride
Project description:Evolutionary resistance of metastatic breast cancer
| PRJNA814378 | ENA
Project description:Evolutionary resistance of metastatic breast cancer
| PRJNA814379 | ENA
Project description:PBMCs from metastatic breast cancer patients
| PRJNA730015 | ENA
Project description:Introduction: The prognosis for patients with breast tumor metastases to brain is extremely poor. Identification of prognostic molecular markers of the metastatic process is critical for designing therapeutic modalities for reducing the occurrence of metastasis. Although ubiquitously present in most human organs, calcium-activated potassium (BK) channel is significantly upregulated in breast cancer cells. In this study we investigated the role of KCNMA1 gene, which encodes α subunit of KCa channels (BK channels) in breast cancer metastasis and invasion. Methods: We performed Global exon array to study the expression of KCNMA1 in metastatic breast cancer in brain, compared its expression in primary breast cancer and breast cancers metastatic to other organs, and validated the findings by RT-PCR. Immunohistochemistry was performed to study the expression and localization of α subunit of KCa channel protein in primary and metastatic breast cancer tissues and breast cancer cell lines. We performed matrigel invasion, transendothelial migration and membrane potential assays in established lines of normal breast cells (MCF-10A), non-metastatic breast cancer (MCF-7), non-brain metastatic breast cancer cells (MDA-MB-231), and brain-specific metastatic breast cancer cells (MDA-MB-361) to study whether KCa channel inhibition attenuates breast tumor invasion and metastasis using KCNMA1 knockdown with siRNA and biochemical inhibition with IBTX (Iberiotoxin). Results: The Global exon array and RT-PCR showed higher KCNMA1 expression in metastatic breast cancer in brain compared to metastatic breast cancers in other organs. Our results clearly show that metastatic breast cancer cells exhibit increased BK channel activity, leading to greater invasiveness and transendothelial migration, both of which could be attenuated by blocking KCNMA1. Conclusion: Determining the relative abundance of BK channel over expression in breast cancer metastatic to brain and the mechanism of its action in brain metastasis will provide a unique opportunity to identify and differentiate between low grade breast tumors that are at high risk for metastasis from those at low risk for metastasis. This distinction would in turn allow for the appropriate and efficient application of effective treatments while sparing patients with low risk for metastasis from the toxic side effects of chemotherapy.
2009-09-09 | GSE17019 | GEO