FAM83H-AS1 silencing in MCF7 breast cancer cells
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ABSTRACT:
PROVIDER: PRJNA558978 | ENA |
REPOSITORIES: ENA
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Project description:We silenced FAM83H-AS1 shRNAs in cell line MCF7 carried a ~75% silencing compared to thenegative control (NC). We evaluated the role of FAM83H-AS1 on oncogenic phenotypes in the MCF7 breast cancer cell line model. The knockdown of FAM83H-AS1 was achieved with ~75% of silencing efficiency. A complete transcriptomic analysis after silencing of FAM83H-AS1 revealed an impact on the global expression.
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Project description:Long non-coding Rnas (lncRNAs) can act as oncogenes or tumor suppressors to regulate cancer development. We found that CYP1B1-AS1 was down-regulated in breast cancer tissues and correlated with the prognosis of patients. Lentiviral vectors were used to overexpress CYP1B1-AS1 in MCF7 cells, and the target proteins bound to CYP1B1-AS1 were detected by pulldown assay and mass spectrometry. The function of CYP1B1-AS1 is unknown. Our study revealed the molecular mechanism of CYP1B1-AS1 inhibiting breast cancer proliferation in breast cancer, and provided a new strategy for the treatment of breast cancer targeting lncRNA.
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Project description:Effect of PBX1 silencing on global gene expression of MCF7 cells stimulated with EGF. The hypothesis tested was that PBX1 is essential for EGF signaling in ERa positive breast cancer cells.
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Project description:The MCF7 cell line represents a typical epithelial cell line and corresponds to luminal A breast cancer (estrogen-responsive). Overexpression of HAX1 was demonstrated in MCF7 cell line as well as in breast cancer samples, suggesting a role of HAX1 in breast cancer progression. HAX1 is a 32-kDa protein of unknown structure, involved in the regulation of apoptosis, cell migration and calcium homeostasis. It was also shown to bind mRNA. Scarcity of structural elements and the presence of a disordered region, inferred from HAX1 sequence, suggests that HAX1 is intrinsically disordered, and may have many protein-protein interactions. So far about 40 different proteins were characterized as HAX1 protein partners. In the present work, applying immunoaffinity chromatography coupled with mass spectrometry, we identified new candidates for HAX1 binding partners in breast cancer cells. Newly identified proteins may be divided into three, partially overlapping groups: cytoskeleton-associated proteins, GTP-ase associated proteins and RNA-binding proteins. These results imply that HAX1 has more protein partners than hitherto described. Subsequent analysis of these interactions may shed some light into molecular mechanisms of HAX1 functions.
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Project description:Gene expression from MCF7 breast cancer cells at different times of TNFa incubation:pcs2 and 14-3-3 transduced cells Keywords: Expression Profiling by array We analyzed 2 arrays from each condition:MCF7-control tnf 0, MCF7-control tnf 20min, MCF-control tnf 90min, MCF7-14-3-3 tnf 0, MCF7-14-3-3 tnf 20min, MCF7-14-3-3 tnf 90min
2012-04-12 | E-GEOD-37139 | biostudies-arrayexpress
Project description:In previous studies, we identified a distantly related rhomboid homologue gene known as RHBDD2 (Rhomboid domain containing 2) to be markedly overexpressed in the advanced stages of the breast and colorectal cancer diseases. In order to identify RHBDD2 modulated pathways, we analyzed two breast cancer cell lines (MCF7 and T47D) from control and RHBDD2-siRNA transient gene silencing followed by gene expression profiling analysis using the whole genome Toray 3D-GeneTM Human Oligo Chip. Statistical analysis of the Toray's 3D gene expression profiling data identified 566 commonly differentially expressed genes in association to the RHBDD2 knockdown in both breast cancer cell lines. Among the statistically significant over-represented biological process, we found the apoptosis, cell cycle and response to DNA damage process related genes. In addition, categories of genes found in the ubiquitin-proteasome and oxidative phosphorylation were also highly enriched related genes in the commonly deregulated gene list. We further used a lentivirus-based system (shRNA-pLKO.1) for stable silencing of RHBDD2 mRNA in the T47D breast cancer cell line. Using a staurosporine-induced apoptosis model, we demonstrate that RHBDD2 abrogation resulted in an apoptosis-resistant phenotype of T47D breast cancer cell line. These data are in line with a recent study, suggesting that RHBDD2 expression could be up-modulated in response to 5FU-induced apoptosis in colorectal cancer cells. Taken together, these data suggest that RHBDD2 could be involved in the modulation of the programmed cell death in cancer cells. In order to analyze differential gene expression profiling of RHBDD2 silencing and control cells, total RNA was isolated from replicate experiments from two breast cancer cell lines (MCF7 and T47D) derived from the negative control-siRNA and the RHBDD2-siRNA treatments in duplicate experiments.
2013-04-10 | E-GEOD-43015 | biostudies-arrayexpress
Project description:Effect of PBX1 silencing on global gene expression of MCF7 cells stimulated with EGF. The hypothesis tested was that PBX1 is essential for EGF signaling in ERa positive breast cancer cells. Total RNA was obtained from MCF7 cells treated with siRNA directed at PBX1 or an siControl for 72h. Cells were then stimulated with estradiol (EGF) for 3h prior to RNA extraction.
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