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Tumor-entrained neutrophils inhibit seeding in the pre-metastatic lung

ABSTRACT: Tumor-entrained neutrophils inhibit seeding in the pre-metastatic lung

PROVIDER: PRJNA144243 | ENA |

REPOSITORIES: ENA

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Tumor-entrained neutrophils inhibit seeding in the pre-metastatic lung

Project description:This SuperSeries is composed of the SubSeries listed below.

2011-07-25 | GSE30888 | GEO

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Pre-metastatic expression array day 7

Project description:Primary tumors have been shown to prepare distal organs for later colonization of metastatic cells by stimulating organ-specific infiltration of bone marrow-derived cells. Here we demonstrate that neutrophils accumulate in the lung prior to the arrival of metastatic cells in mouse models of breast cancer. Tumor-entrained neutrophils (TENs) inhibit metastatic seeding in the lungs by generating H2O2, and tumor-secreted CCL2 is a critical mediator of optimal anti-metastatic entrainment of G-CSF-stimulated neutrophils. TENs are present in the peripheral blood of breast cancer patients prior to surgical resection but not in healthy individuals. Thus, while tumor-secreted factors contribute to tumor progression at the primary site, they concomitantly induce a neutrophil-mediated inhibitory process at the metastatic site. To follow the earliest transcriptional changes in pre-metastatic tissues, we orthotopically injected 4T1 cells into the mammary fat pad of female nude mice. Control mice were orthotopically injected with PBS. 7 days post tumor engraftment, the mice were sacrificed and thoroughly perfused with ice cold PBS, and lung and liver samples were flash frozen in liquid nitrogen. Following RNA extraction, the lung and liver RNA samples were analyzed on MOE430A2 Affymetrix arrays using R/Bioconductor software.

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Project description:We herein examine the transciptioal alteration of a single cell derived MDA-MB-231 subline,SCP21. By retrieving tumor cells inoculated in different sites, we generated multiple mammary fat pad tumor, lung metastases or bone metastasis derived SCP21 sublines. RNA-sequencing uncovered the decreased expression of EZH2 target genes in bone metastases derived cells compared other organ entrained and parental SCP21 cells , suggesting enhanced EZH2 activity. Moreover, such phenotype is reversible upon in vitro culture. As a positive control, bone derived cells were also treated with EZH2 inhibitor, EPZ011989, to confirm the decreased level of EZH2 target genes upon EZH2 inhibition.

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Hepato-entrained B220+CD11c+NK1.1+ cells regulate pre-metastatic niche formation in the lung

Project description: Not available

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Global circadian transcript profile of mouse heart entrained by inverted feeding

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