Homo sapiens
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA110257 | ENA |
REPOSITORIES: ENA
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Project description:Tet-on and tet-off systems are among the most popular vector systems for inducible transgene expression in mammalian cells. In tet-regulated systems the expression of the transgene depends on the presence or absence of the antibiotic tetracycline or its derivative doxycycline, which are added to the cell culture medium in concentrations considered to be far below cytotoxic levels. Therefore, potential effects on the treated cells, which are exerted by the antibiotic itself and unrelated to transgene expression, are often ignored. We examined the influence of low dose doxycycline on the transcriptional profile of two independent clones of MCF7 human breast carcinoma cells, transfected with tet-off regulator and response plasmids but not harboring any transgene. Treatment with 80 ng/ml doxycycline for 12 days markedly altered gene expression in these cells. Many genes associated with interferon-signaling were up-regulated while cell cycle-associated genes were down-regulated, which was also accompanied by a reduction of cell growth. These results highlight the importance of appropriate controls when working with tet-regulated gene expression systems, to allow distinction between the effects of transgene expression and potential “side effects” of the antibiotic used for its regulation.
2011-05-20 | GSE13926 | GEO
Project description:To identify the target of miR-212, miR-132 and HIC1, we have employed whole genome microarray expression profiling on the human breast cancer MCF7 cells. To generate miR-212/132 or HIC1 inducible MCF7 cells, doxycycline-dependent miR-212/132 or HIC1 gene expression system was used. Either Tet-ON miR-212/132 MCF7 or Tet-ON HIC1 MCF7 were treated with 1μg/ml of Doxycycline for 36 hours with EMEM containing 0.01 mg/ml bovine insulin and 10% FCS. Two independent experiments were performed.
2014-07-29 | E-GEOD-37945 | biostudies-arrayexpress
Project description:MCF7 and MDA-MB-231 breast cancer cell lines were cultured in DMEM-F12 containing 10% FBS (Lonza) 100U/ml penicillin and 100 µg/ml streptomycin (Lonza). Transfecting third generation packaging vectors using Poly-ethylenimine into HEK293T cells generated lentiviral particles (17). MCF7 and MDA-MB-231 cells were stably transduced with lentivirus containing pINDUCER20-FOXO3.A3, allowing doxycycline induced expression of constitutively active FOXO3 (FOXO3.A3). Cells were treated with 20% FBS or 10 µM PI3K inhibitor LY294002 (Selleckchem) for 16 hours to activate and inactivate the endogenous PI3K pathway, respectively. FOXO3.A3 expression was induced by 16 hours treatment with 10 ng/ml doxycycline.
2018-06-06 | GSE113479 | GEO
Project description:Transformed human esophageal keratinocyte cell line EPC2-T (EPC2-hTERT-EGFR-cyclin D1-p53R175H) cells were stimulated with or without 2.5 ng/ml recombinant human TGF-beta1 for 10 days. The above cells were subjected to treatment for 10 days with or without 0.5 µg/ml doxycycline (DOX) to activate tetracycline-inducible (tet-on) ICN1, an active form of Notch1.
2014-12-31 | GSE37994 | GEO
Project description:AGY571 cells engineered to express Dox-inducible GFP or ATG7 were treated with 500 ng/mL or 1 ug/mL Doxycycline for 48 hours. Assessing the effects of ATG7 reexpression in B cell lymphoma.
2016-09-08 | ST000460 | MetabolomicsWorkbench
Project description:RNA sequencing for enteroids treated with different concentrations of IL-17 (0 ng/ml. 1 ng/ml, 10 ng/ml and 100 ng/ml)
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Project description:THP-1 cells: control vs. 50 ng/ml PMA treated for 72 h
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Project description:HeLa cells were stably transfected using the Tet-On® Advanced Cell Line system with Wildtype, G392E and Delta Neuroserpin with neuroserpin expression induced with doxycycline. Gene expression was examined in the absence or presence of 2 ug/ml doxycycline.
2013-04-20 | GSE46230 | GEO
Project description:To investigate the role of tumor epithelial-to-mesenchymal plasticity in CD8+ T cell cytotoxicity, we generated two types of tumor cells with epithelial-like (Epi) or mesenchymal-like (Mes) features through an inducible EMT system. The parental KPC3-OVA cells were transduced with constitutively kinase active ALK5 cDNA (ALK5 CA) in doxycycline-induced system by Nakao et al. and Itoh et al, which initiated TGF-β signaling induced EMT. In this system, we firstly treated cells with TGF-β (5 ng/mL) for 2 days, then removed TGF-β ligands and added doxycycline to sustain cancer cells with mesenchymal feature. We proved the mesenchymal-like phenotype could maintain more than 16 days, which was long enough for all our experiments. Then we performed RNA-seq to investigate the differences between these two types of KPC3-OVA :: Tet-On ALK5 CA cells co-cultured with OT-1 CD8+ T cells or not.
2023-05-16 | GSE215803 | GEO
Project description:Deregulation of Src kinases is associated with cancer. We previously showed that SrcDN conditional expression in MCF7 cells diminished tumorigenesis and causes tumor regression in mice. However, it remained unclear whether SrcDN affected breast cancer stem cell functionality or it reduced tumor mass. Here, we address this question by isolating an enriched population of BCSCs (ESA+-CD44+-CD24-) and the tumor-differentiated cells (ESA+-CD44+-CD24+) from MCF7-Tet-On-SrcDN. ESA+-CD44+-CD24- grew in suspension forming mammospheres, and producing tumors in nude mice, while ESA+-CD44+-CD24+ were poorly/non-tumorigenic. Doxycycline-induction of SrcDN inhibited BCSC tumorigenesis, selfrenewal, and stem-cell markers expression. SrcDN significantly inhibited SFE, and stem-cell markers expression in triple-negative breast cancer (TNBC) MDA-MB-231 and SUM159PT cells. Inducible depletion of c-Src caused similar effects in MDA-MB-231 cells. In MCF7-Tet-On-SrcDN derived mammospheres SrcDN-induction inhibited expression, and activity of hexokinase, pyruvate kinase and lactate dehydrogenase, resulting in diminished glucose consumption and lactate production, which restricted Warburg effect. Thus, c-Src functionality is important for breast cancer stem cell maintenance and renewal, tumorigenicity, and stem cell transcription factor expression, effects linked to glucose metabolism reduction.
2020-07-23 | PXD017789 | Pride