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Gene expression by high-throughput sequencing of T47D-MTVL human breast cancer cells upon H1.2 knock-down

ABSTRACT: Gene expression of T47D-MTVL human breast cancer cells expressing Dox-inducible shRNAs against histone H1.2 (H1.2sh).

ORGANISM(S): Homo sapiens

PROVIDER: GSE190158 | GEO | 2023/12/08

REPOSITORIES: GEO

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Gene expression of T47D-MTVL human breast cancer cells upon H1X knock-down

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Project description:Gene expression of T47D-MTVL human breast cancer cells expressing Dox-inducible shRNAs against histone H1X Stable breast cancer-derived cell lines expressing an shRNA against the histone H1X isoforms in response to doxycycline (Dox) were grown for six days in the presence or absence of Dox, and serum-starved for the last 48h for synchronization in G1, in duplicate, and RNA extracted for microarray hybridization. Cell lines used: inducible shRNA against H1X, and random shRNA-expression vector as a control.

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T47D_MTVL_H1.2sh or T47D_MTVL_controlsh

Project description:H1.2 (and control) knock-down cell lines were established from T47D-MTVL cells: Human breast cancer cell line T47D modified to contain one stably integrated copy of Luciferase reporter gene driven by the Mouse Mammary Tumor Virus promoter, named T47D-MTVL (Truss, M., J. Bartsch, A. Schelbert, R. J. Hache, and M. Beato. 1995). Initially, a cell line expressing the Dox-responsive KRAB repressor and RedFP (ptTR-KRAB-Red) was generated. Then, this cell line was infected with viruses for expression of the different H1 variants shRNAs (pLVTHM). The inducible knocked-down cell lines were sorted in a FACSvantageSE (Becton Dickinson) for RedFP-positive and GFP-positive fluorescence after 3 days of Dox treatment. Then cells were amplified in the absence of Dox until an experiment was performed. Plasmids for the lentivirus vector-mediated drug-inducible RNA interference system (pLVTHM, ptTR-KRAB-Red, pCMC-R8.91 and pMD.G) were provided by D. Trono (University of Geneva) (Wiznerowicz M & Trono D (2003) Conditional suppression of cellular genes: lentivirus vector-mediated drug-inducible RNA interference. J Virol 77: 8957-8961). Keywords: Gene expression - T47D-MTVL-control sh/sh H1.2 +/- Dox induction

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Gene expression by high-throughput sequencing of T47D-MTVL human breast cancer cells upon H1.2 knock-down

Project description:Gene expression by high-throughput sequencing of T47D-MTVL human breast cancer cells upon H1.2 knock-down

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Genome-wide profiling of histone H1 variants and H3K9me3 in T47D-MTVL cells upon multiple H1 depletion

Project description:Human somatic cells may contain up to seven members of the histone H1 family contributing to chromatin compaction and regulation of nuclear processes, apparently with certain subtype specificities. In breast cancer cells, the combined depletion of H1.2 and H1.4 has a strong deleterious effect, deregulates many genes, promotes the appearance of accessibility sites genome-wide, and triggers an interferon response via activation of heterochromatic repeats. We have further analyzed the consequences of multiple H1 variants depletion by profiling the occupancy of five somatic histone H1 variants and H3K9me3 post-translational modification in T47D-MTVL cancer cells. Specifically, stable breast cancer-derived cell lines expressing an shRNA against multiple histone H1 isoforms in response to doxycycline (Dox) were grown for six days in the presence or absence of Dox. ChIP-Seq experiments were subsequently performed to analyze the genome-wide localization of histone H1 variants and H3K9me3.

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