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RRAD, IL4I1, CDKN1A, and SERPINE1 genes are potentially co-regulated by NF-κB and p53 transcription factors in cells exposed to high doses of ionizing radiation [ChIP-Seq]

ABSTRACT: RRAD, IL4I1, CDKN1A, and SERPINE1 genes are potentially co-regulated by NF-κB and p53 transcription factors in cells exposed to high doses of ionizing radiation [ChIP-Seq]

PROVIDER: PRJNA434584 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR6748786.fastq.gz	Fastqsanger.gz
	SRR6748787.fastq.gz	Fastqsanger.gz
	SRR6748788.fastq.gz	Fastqsanger.gz

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RRAD, IL4I1, CDKN1A, and SERPINE1 genes are potentially co-regulated by NF-κB and p53 transcription factors in cells exposed to high doses of ionizing radiation [ChIP-Seq]

Project description:Cellular response to ionizing radiation involves activation of the p53-dependent pathways and activation of the atypical NF-κB pathway. Mechanisms of the crosstalk between these two transcriptional networks include (co)regulation of common gene targets. Novel genes potentially (co)regulated by p53 and NF-κB were found using high-throughput genomics screening in human osteosarcoma U2-OS cells irradiated with a high dose (4 and 10 Gy). Radiation-induced expression in cells with silenced TP53 or RELA (coding the p65 NF-κB subunit) genes was analyzed by RNA-Seq while radiation-induced binding of p53 and RelA (p65) in putative regulatory regions was analyzed by ChIP-Seq, then selected candidates were validated by qPCR. A subset of radiation-modulated genes whose expression was affected by silencing of both TP53 and RELA, and a subset of radiation-upregulated genes where radiation stimulated binding of both p53 and RelA were identified. Competition for the same transcriptional coactivators of p53 and NF-κB was the most probable mechanism of a frequent antagonistic effect of the TP53 and RELA silencing. However, this mode of regulation was noted for 3 genes where radiation-induced binding of both p53 and RelA was observed, namely IL4I1, SERPINE1, and CDKN1A. This suggested a possibility of a direct antagonistic (co)regulation by both factors: activation by NF-κB and inhibition by p53 of IL4I1, and activation by p53 and inhibition by NF-κB of CDKN1A and SERPINE1. On the other hand, radiation-induced binding of both p53 and RelA was observed in a putative regulatory region of RRAD gene whose expression was downregulated both by TP53 and RELA silencing, which suggested a possibility of direct (co)activation by both factors.

2018-02-19 | GSE110800 | GEO

RRAD, IL4I1, CDKN1A, and SERPINE1 genes are potentially co-regulated by NF-κB and p53 transcription factors in cells exposed to high doses of ionizing radiation [RNA-Seq]

Project description:Cellular response to ionizing radiation involves activation of the p53-dependent pathways and activation of the atypical NF-?B pathway. Mechanisms of the crosstalk between these two transcriptional networks include (co)regulation of common gene targets. Novel genes potentially (co)regulated by p53 and NF-?B were found using high-throughput genomics screening in human osteosarcoma U2-OS cells irradiated with a high dose (4 and 10 Gy). Radiation-induced expression in cells with silenced TP53 or RELA (coding the p65 NF-?B subunit) genes was analyzed by RNA-Seq while radiation-induced binding of p53 and RelA (p65) in putative regulatory regions was analyzed by ChIP-Seq, then selected candidates were validated by qPCR. A subset of radiation-modulated genes whose expression was affected by silencing of both TP53 and RELA, and a subset of radiation-upregulated genes where radiation stimulated binding of both p53 and RelA were identified. Competition for the same transcriptional coactivators of p53 and NF-?B was the most probable mechanism of a frequent antagonistic effect of the TP53 and RELA silencing. However, this mode of regulation was noted for 3 genes where radiation-induced binding of both p53 and RelA was observed, namely IL4I1, SERPINE1, and CDKN1A. This suggested a possibility of a direct antagonistic (co)regulation by both factors: activation by NF-?B and inhibition by p53 of IL4I1, and activation by p53 and inhibition by NF-?B of CDKN1A and SERPINE1. On the other hand, radiation-induced binding of both p53 and RelA was observed in a putative regulatory region of RRAD gene whose expression was downregulated both by TP53 and RELA silencing, which suggested a possibility of direct (co)activation by both factors.

2018-02-17 | GSE110762 | GEO

RRAD, IL4I1, CDKN1A, and SERPINE1 genes are potentially co-regulated by NF-κB and p53 transcription factors in cells exposed to high doses of ionizing radiation [RNA-Seq]

Project description:RRAD, IL4I1, CDKN1A, and SERPINE1 genes are potentially co-regulated by NF-κB and p53 transcription factors in cells exposed to high doses of ionizing radiation [RNA-Seq]

| PRJNA434471 | ENA

RRAD, IL4I1, CDKN1A, and SERPINE1 genes are potentially co-regulated by NF-κB and p53 transcription factors in cells exposed to high doses of ionizing radiation.

Project description:BackgroundThe cellular response to ionizing radiation involves activation of p53-dependent pathways and activation of the atypical NF-κB pathway. The crosstalk between these two transcriptional networks include (co)regulation of common gene targets. Here we looked for novel genes potentially (co)regulated by p53 and NF-κB using integrative genomics screening in human osteosarcoma U2-OS cells irradiated with a high dose (4 and 10 Gy). Radiation-induced expression in cells with silenced TP53 or RELA (coding the p65 NF-κB subunit) genes was analyzed by RNA-Seq while radiation-enhanced binding of p53 and RelA in putative regulatory regions was analyzed by ChIP-Seq, then selected candidates were validated by qPCR.ResultsWe identified a subset of radiation-modulated genes whose expression was affected by silencing of both TP53 and RELA, and a subset of radiation-upregulated genes where radiation stimulated binding of both p53 and RelA. For three genes, namely IL4I1, SERPINE1, and CDKN1A, an antagonistic effect of the TP53 and RELA silencing was consistent with radiation-enhanced binding of both p53 and RelA. This suggested the possibility of a direct antagonistic (co)regulation by both factors: activation by NF-κB and inhibition by p53 of IL4I1, and activation by p53 and inhibition by NF-κB of CDKN1A and SERPINE1. On the other hand, radiation-enhanced binding of both p53 and RelA was observed in a putative regulatory region of the RRAD gene whose expression was downregulated both by TP53 and RELA silencing, which suggested a possibility of direct (co)activation by both factors.ConclusionsFour new candidates for genes directly co-regulated by NF-κB and p53 were revealed.

| S-EPMC6233266 | biostudies-literature

Gene expression profile of IL4I1 knockout CAS-1 glioblastoma cells

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Transcriptome sequencing of Serpine1-overexpression MLE-12 cells

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Project description:This purpose of this experiment was to investigate the transcriptional differences between C57BL6, TIMP1 and Serpine1 knock-out mice infected with SARS MA15 virus. Overview of Experiment: Groups of 20 week old C57BL6, TIMP1 and Serpine1 (PAI1) knock-out mice were infected with SARS MA15 virus. Infections were done at 10^4 PFU or time-matched mock infected. Time points were 4 and 7 d.p.i. There were 2-4 animals/dose/time point. Lung samples were collected for virus load, transcriptional and proteomics analysis. Weight loss and animal survival were also monitored.

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Diverse roles of SERPINE1 in regulating cellular proliferation and invasion

Project description:SERPINE1 is involved in various biological processes, but its roles in promoting or suppressing tumorigenesis remain controversial. To understand the underlying mechanisms, we focused on the effects of SERPINE1 downregulation on cell phenotypes, particularly proliferation and invasion, across three types of tumors. High SERPINE1 levels in breast cancer (BRCA) and low-grade glioma (LGG) were associated with poor prognosis. In contrast, elevated SERPINE1 levels in skin cutaneous melanoma (SKCM) correlated with better outcomes. SERPINE1 knockdown resulted in increased xenograft growth in the melanoma cell line C918. This was characterized by the promotion of the cell cycle through the modulation of minichromosome maintenance protein expression and the activity of p53 and SMAD3. In breast cancer cells (MDA-MB-231) with SERPINE1 knockdown, there was decreased xenograft growth and cell proliferation, attributed to a reduction in the uPAR-mediated ERK/p38 activity ratio. With SERPINE1 knockdown, both C918 and MDA-MB-231 cells demonstrated reduced invasion capabilities, decreased matrix metalloproteinase (MMP) activity, and reduced lung metastasis. In low-grade glioma cells (H4), SERPINE1 knockdown led to decreased cell proliferation due to a reduction in the HSP90-mediated ERK/p38 activity ratio. However, it increased invasion and MMP activity, particularly of MMP-1, regulated by the HSP90-p38 axis. Collectively, our findings reveal that SERPINE1 exerts diverse effects on cell proliferation and invasion through context-dependent mechanisms. These results suggest that targeting SERPINE1 may offer personalized therapeutic strategies to enhance treatment precision and reduce adverse effects.

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