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Plasticity between Epithelial and Mesenchymal States Unlinks EMT from Metastasis-Enhancing Stem Cell Capacity

ABSTRACT: In this study we studied the presence of tumor cells that underwent epithelial-to-mesenchymal transition within polyoma middle T antigen (PyMT) breast tumors. For this we dissociated tumors and isolated Ecad positive tumor cells by FACS sorting. We confirmed that PyMT tumors contain a small set of tumor cells that have undergone EMT in the primary tumor and that E-cadherin can be used as a marker on single cell level for mesenchymal status in this model.

ORGANISM(S): Mus musculus

PROVIDER: GSE77107 | GEO | 2016/03/09

SECONDARY ACCESSION(S): PRJNA309444

REPOSITORIES: GEO

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Single-cell RNA-seq of Ecad positive PyMT bulk tumor cells

Project description:In this study we studied the presence of tumor cells that underwent epithelial-to-mesenchymal transition within polyoma middle T antigen (PyMT) breast tumors. For this we dissociated tumors and isolated Ecad positive tumor cells by FACS sorting. We confirmed that PyMT tumors contain a small set of tumor cells that have undergone EMT in the primary tumor and that E-cadherin can be used as a marker on single cell level for mesenchymal status in this model. We isolated primary tumors from mice, dissociated the tumors and FACS-sorted for single Ecad positive tumor cells, after this we performed single cell sequencing of the cells.

2016-03-09 | E-GEOD-77107 | biostudies-arrayexpress

Gene expression of polyoma middle T antigen induced mammary tumors

Project description:This SuperSeries is composed of the following subset Series: GSE30864: Gene expression of polyoma middle T antigen induced mammary tumors [AKXD x PyMT] GSE30865: Gene expression of polyoma middle T antigen induced mammary tumors [NZB x PyMT] GSE31223: Gene expression of polyoma middle T antigen induced mammary tumors [RNA_Seq : MOLF x PyMT] Refer to individual Series

2011-07-21 | E-GEOD-30866 | biostudies-arrayexpress

Consequences of sEH deletion in the polyoma middle T (PyMT) breast cancer tumor proteome

Project description:The aim of this investigation was to study the consequences of interfering with soluble epoxide hydrolase (sEH) expression on tumor growth and metastasis in genetically modified animals that spontaneously generate tumors without the exogenous application of high concentrations of epoxide mediators or inhibitors. Therefore, breast cancer development was studied in mice expressing the polyoma middle T oncogene (PyMT) under the control of the mouse mammary tumor virus promoter, to induce spontaneous mammary tumors. To facilitate the study of endogenous sEH activity in tumor growth, PyMT mice were then crossed with sEH-/- mice to generate sEH-deficient mice that spontaneously generate breast tumors (so called PyMTsEH mice). For these analyses, primary tumors were removed from 20 week old mice.

2021-09-14 | PXD026214 | Pride

Plasticity between Epithelial and Mesenchymal States Unlinks EMT from Metastasis-Enhancing Stem Cell Capacity

Project description:mRNA sequencing of PyMT primary tumor cells with and without E-cadherin

| PRJEB5939 | ENA

Analysis of differentiation therapeutic approaches on murine breast cancer organoids

Project description:In this experiment, we have tested the effect of microRNA-203 as a potential differentiation inducer in breast cancer organoids, derived from the PyMT mouse model. MMTV-PyVT transgenic mice express the Polyoma Virus middle T antigen under the direction of the mouse mammary tumor virus promoter/enhancer. Hemizygous MMTV-PyMT females develop palpable mammary tumors which metastasize to the lung. These mice have high penetrance of early onset of mammary cancer compared to other mammary tumor models. PyMT mice were crossed with miR-203 knock-in mice, where miR-203 expression is induced upon DOX treatment. Thus, organoids derived from the mammary gland tumors of such mouse model where evaluated in vitro. miR-203 expression was therefore induced by Doxycycline in vitro, and compared to other well-defined differentiation media for breast cancer tissue, such as the mammary epithelial cell culture media and kit (CC-2551B; Lonza).

2023-08-09 | GSE202831 | GEO

Differential expression of GFP+ and RFP+ TriPyMT cells

2015-09-01 | GSE72480 | GEO

Expression data of MMTV-PyMT mice mammary tumor with or without JAM-A

Project description:Junction Adhesion Molecule-A (JAM-A) is present on leukocytes and platelets where it promotes cell adhesion and motility. We are interested in an interaction between JAM-A and tumor progression/metastases. To address this point, we mated JAM-A-/- mice and mouse mammary tumor model MMTV-PyMT mice which, which express polyoma middle T antigen under the control of mouse mammary tumor virus. MMTV-PyMT mice show 100% penetration of mammary tumor and highly metastases to lung. MMTV-PyMT mice without JAM-A show less primary tumor progression, therefore JAM-A enhance primary tumor progression. Then we are addressing the molecular mechanism of this phenomenon by in vivo. Furthermore, we would like to examine JAM-A deficient MMTV tumor signature. Each 3 MMTV-PyMT JAm-A+/+ (JamA+) and 3 MMTV JAM-A-/- (JamA-) mammary tumor were resected at early stages of tumor development for RNA extraction and hybridization on Affymetrix microarrays.

2010-10-01 | E-GEOD-22555 | biostudies-arrayexpress

Differential expression of GFP+ and RFP+ TriPyMT cells

Project description:Tri-PyMT cell is a breast tumor cell line established from Tri-PyMT (MMTV-PyMT/fsp1-Cre/Rosa26-RGFP) primary breast tumors. The cells switch from RFP+ to GFP+ during epithelial to mesenchymal transition (EMT). Differential expressed genes between EMT and non-EMT tumor cells will reveal interesting targets for anti-EMT approaches. Tri-PyMT cells were culture in medium with serum (10%FBS). Cells were treated with or without 4-hydroperoxy-cyclophosphamide (4µM) for 7 days and sorted by flow cytometry into RFP+ and GFP+ subpopulations for RNA extraction and subsequent RNA-Seq analysis.

2015-09-01 | E-GEOD-72480 | biostudies-arrayexpress

Expression array of carcinoma cell Mmp14-targeted MMTV-PyMT mammary tumors

Project description:Breast carcinoma cell invasion is thought to depend on the mobilization of the membrane-anchored matrix metalloproteinase, Mmp14/MT1-MMP, to drive the remodeling of extracellular matrix and trigger associated signaling cascades. However, the roles that this proteinase plays during breast tumor progression and invasion in vivo remain undefined. A highly penetrant syngeneic mouse model for luminal B breast cancer driven by the polyoma middle T (PyMT) antigen, in tandem with recently developed Mmp14-floxed mice and MMTV-Cre transgenics that express Cre recombinase throughout the mammary epithelial cell compartment, were used to characterize the impact of conditional Mmp14-targeting on breast carcinoma cell invasion programs in vivo. Transcriptome profiling of intact MMTV-PyMT carcinoma tumors was used to investigate the functional roles of carcinoma cell-derived MT1-MMP in MMTV-PyMT tumor progression and invasion in an unbiased fashion

2018-12-01 | GSE118466 | GEO

Expression data of MMTV-PyMT mice mammary tumor with or without JAM-A

2010-10-01 | GSE22555 | GEO

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