Expression of human and mouse breast cancer cell lines
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ABSTRACT:
ORGANISM(S): Mus musculus Homo sapiens
PROVIDER: GSE25972 | GEO | 2011/01/15
SECONDARY ACCESSION(S): PRJNA135447
REPOSITORIES: GEO
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Project description:Multiple breast cancer cell lines with different metastatic capabilities The goal of this study is to identify metastasis related genes in breast cancer We obtained RNA from each cell line using regular Trizol and RNA purification kit. Keywords: Expression profiling by array Multiple breast cancer cell lines with different metastatic capabilities
2011-01-15 | E-GEOD-25972 | biostudies-arrayexpress
Project description:In advanced malignancies, cancer cells have acquired capabilities to resist a variety of stress-inducing insults. We show that c-Jun N-terminal kinase (JNK) stress signaling is highly active in cancer cells from patients with late stage breast cancer and promotes tumor growth and metastasis in mouse models. Transcriptomic analysis revealed that JNK activity induces genes associated with extracellular matrix (ECM), wound healing and mammary stem cells. The ECM proteins and niche components osteopontin (SPP1) and tenascin C (TNC) are induced by JNK signaling and promote metastatic colonization of the lungs. Notably, treatment with chemotherapeutic drugs induces JNK activity in breast cancer cells, reinforcing the production of SPP1 and TNC. Inhibition of JNK or reduction of SPP1 or TNC expression sensitizes primary tumors and metastases in mice to chemotherapy. We used Affymetrix microarrays to investigate gene expression changes upon culturing metastatic breast cancer cells as oncospheres, in ultra-low adhesive plates in the absence of serum, in contrast to regular monolayer culture conditions.
2018-08-26 | GSE98239 | GEO
Project description:We used comparative RNA hybridization (Affymetrix) analysis between Bone metastatic derivatives isolated in vivo and parental cells and focused on changes affecting the expression of potential bone metastasis genes. Total RNA from biological and technical replicates of parental MCF7 and BoM2 bone metastasis derivatives grown for 48 hours in regular media (see growth protocol) was isolated from in vitro cultured control and MAF expressing MCF7 parental cells. Total RNA was extracted using the TRIzolM-BM-. Plus RNA Purification Kit (Life Technologies).
2014-10-01 | E-GEOD-51232 | biostudies-arrayexpress
Project description:Breast cancer is the leading type of cancer in women. Breast cancer brain metastasis is considered as an essential issue in breast cancer patients. Membrane proteins play important roles in breast cancer brain metastasis that contributes to the cell adhesion and penetration of blood-brain barrier. To achieve a deeper insight of the mechanism of breast cancer brain metastasis, liquid chromatography tandem mass spectrometry (LC-MS/MS) was performed to analyze the enriched membrane proteomes from six different breast cancer cell lines. Quantitative proteomic data of all cell lines were compared with MDA-MB-231BR which has the specific brain metastasis capacity. 1239 proteins were identified and 990 were quantified with more than 70% of membrane proteins in all cell lines. Each cell line can be separated apart from others in PCA. Ingenuity pathway analysis (IPA) supported the high brain metastatic ability of 231BR and suggested importance of the up-regulation of integrin proteins and down-regulation of EPHA in brain metastasis. 28 proteins were observed unique expression alteration in 231BR. The up-regulation of NPM1, hnRNP Q, hnRNP K and eIF3l and the down-regulation of TUBB4B and TUBB were observed to be associated with the brain metastasis cell line and may contributes to the breast cancer brain metastasis.
2017-05-23 | PXD005719 | Pride
Project description:High Arid4b promotes mammary tumor growth and metastasis in mouse model systems, and is associated with poor metastasis-free survival in human breast cancer patients. Through shRNA-mediated knockdown, we demonstrated that loss of Arid4b significantly inhibits the ability of mouse breast cancer cells to metastasize to the lungs. We performed microarray expression and subsequent network analysis to identify genes diferentially regulated as a consequence of Arid4b knockdown. The highly metastatic mouse breast cancer cell line 6DT1 was transduced with lentiviral shRNAs targeting Arid4b (RMM4534-NM_194262, Open Biosystems) or scrambled control in the same pLKO.1 vector backbone. Stably transduced cells were selected with puromycin, then total RNA was isolated from pooled clones.
2012-04-23 | E-GEOD-35731 | biostudies-arrayexpress
Project description:Mass-spectrum profiling of secretory proteins of breast cancer cells with varied capabilities of metastasis to lungs and bone.
2017-10-04 | PXD007227 | Pride
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
Project description:Abstract:
Accumulating experimental and clinical evidence suggest that the immune response to cancer is not exclusively anti-tumor. Indeed, the pro-tumor roles of the immune system - as suppliers of growth and pro-angiogenic factors or defenses against cytotoxic immune attacks, for example - have been long appreciated, but relatively few theoretical works have considered their effects. Inspired by the recently proposed "immune-mediated" theory of metastasis, we develop a mathematical model for tumor-immune interactions at two anatomically distant sites, which includes both anti- and pro-tumor immune effects, and the experimentally observed tumor-induced phenotypic plasticity of immune cells (tumor "education" of the immune cells). Upon confrontation of our model to experimental data, we use it to evaluate the implications of the immune-mediated theory of metastasis. We find that tumor education of immune cells may explain the relatively poor performance of immunotherapies, and that many metastatic phenomena, including metastatic blow-up, dormancy, and metastasis to sites of injury, can be explained by the immune-mediated theory of metastasis. Our results suggest that further work is warranted to fully elucidate the pro-tumor effects of the immune system in metastatic cancer.
2020-03-28 | BIOMD0000000926 | BioModels
Project description:Purpose: Advanced breast cancer leads to significantly higher mortality due to metastasis. The goal of this work is to screen and study the deregulated epigenetic regulators to identify the novel targets for the treatment of metastatic breast cancer. Methods:RNA-Seq analysis of matched primary and metastatic breast samples to detect the deregulated epigenetic regulators. Live imaging system was applied to modulate metastatic tumor growth in vivo. Results: we identified that deregulated CECR2 was associated with breast cancer metastasis by RNA sequencing analysis of the matched primary and metastatic breast cancer samples from 13 patients. CECR2 knockout significantly decreased breast cancer metastasis in both immunocompromised and immunocompetent mice models. RNA-seq analysis showed that gene set "response to NF-κB signaling" was significantly decreased by CECR2 depletion in breast cancer cells. Mechanistically, CECR2 formed a complex with RELA on NF-κB target gene promoters to activate target gene expression. Furthermore, CECR2 played a key role in tumor associated macrophage recruitment and polarization, which regulates the antitumor immunity in microenvironment. Conclusions: our work identified and characterized a novel epigenetic regulator CECR2 in regulating breast cancer metastasis, and can serve as a potential target for the treatment of metastatic breast cancer.
2021-12-31 | GSE147995 | GEO
Project description:Purpose: Advanced breast cancer leads to significantly higher mortality due to metastasis. The goal of this work is to screen and study the deregulated epigenetic regulators to identify the novel targets for the treatment of metastatic breast cancer. Methods:RNA-Seq analysis of matched primary and metastatic breast samples to detect the deregulated epigenetic regulators. Live imaging system was applied to modulate metastatic tumor growth in vivo. Results: we identified that deregulated CECR2 was associated with breast cancer metastasis by RNA sequencing analysis of the matched primary and metastatic breast cancer samples from 13 patients. CECR2 knockout significantly decreased breast cancer metastasis in both immunocompromised and immunocompetent mice models. RNA-seq analysis showed that gene set "response to NF-κB signaling" was significantly decreased by CECR2 depletion in breast cancer cells. Mechanistically, CECR2 formed a complex with RELA on NF-κB target gene promoters to activate target gene expression. Furthermore, CECR2 played a key role in tumor associated macrophage recruitment and polarization, which regulates the antitumor immunity in microenvironment. Conclusions: our work identified and characterized a novel epigenetic regulator CECR2 in regulating breast cancer metastasis, and can serve as a potential target for the treatment of metastatic breast cancer.
2021-12-31 | GSE147993 | GEO