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MRNA-seq data for DDX3 knockdown in murine hepatocytes in vivo and in vitro

ABSTRACT: mRNA-seq data for DDX3 knockdown in murine hepatocytes in vivo and in vitro

PROVIDER: PRJNA739730 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR14872600.fastq.gz	Fastqsanger.gz
	SRR14872601.fastq.gz	Fastqsanger.gz
	SRR14872602.fastq.gz	Fastqsanger.gz
	SRR14872603.fastq.gz	Fastqsanger.gz
	SRR14872604.fastq.gz	Fastqsanger.gz

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mRNA-seq data for DDX3 knockdown in murine hepatocytes in vivo and in vitro

Project description:A transcriptome analysis was performed to estimate a primary response of the hepatocytes to depletion of DDX3 RNA helicase both in vitro and in vivo. We used two siRNAs with different efficacy and demonstrated protein level-dependent effects on DDX3 RNA helicase depletion in the murine liver. We found that strong reduction of DDX3 protein (>85%) leads to similar changes in vitro and in vivo – we observed deregulation of cell cycle, Wnt and cadherin pathways. However, more modest downregulation of DDX3 protein (60-65%) resulted in discordant results between gene expression in vitro and in vivo – in vitro data were close to those under strong reduction, while in vivo phenotype was weak. These results demonstrate that the level of active DDX3 protein can dramatically influence on the phenotype in vivo, which should be taken into account during drug development.

2021-06-29 | GSE178618 | GEO

Level of Murine DDX3 RNA Helicase Determines Phenotype Changes of Hepatocytes In Vitro and In Vivo.

Project description:DDX3 RNA helicase is intensively studied as a therapeutic target due to participation in the replication of some viruses and involvement in cancer progression. Here we used transcriptome analysis to estimate the primary response of hepatocytes to different levels of RNAi-mediated knockdown of DDX3 RNA helicase both in vitro and in vivo. We found that a strong reduction of DDX3 protein (>85%) led to similar changes in vitro and in vivo-deregulation of the cell cycle and Wnt and cadherin pathways. Also, we observed the appearance of dead hepatocytes in the healthy liver and a decrease of cell viability in vitro after prolonged treatment. However, more modest downregulation of the DDX3 protein (60-65%) showed discordant results in vitro and in vivo-similar changes in vitro as in the case of strong knockdown and a different phenotype in vivo. These results demonstrate that the level of DDX3 protein can dramatically influence the cell phenotype in vivo and the decrease of DDX3, for more than 85% leads to cell death in normal tissues, which should be taken into account during the drug development of DDX3 inhibitors.

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Genome wide analysis of mRNA expression and polysome profiling in DDX3 knockdown SAS cells

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Effect of DDX3 inhibitors on CD4+ T cells

Project description:An innovative approach to eliminate HIV-1-infected cells emerging out of latency, the major hurdle to HIV-1 cure, is to pharmacologically reactivate viral expression and concomitantly trigger intracellular pro-apoptotic pathways in order to selectively induce cell death (ICD) of infected cells, without reliance on the extracellular immune system. In this work we demonstrate the effect of DEAD-box polypeptide 3, X-Linked (DDX3) inhibitors on selectively inducing cell death in latent HIV-1-infected cell lines, primary CD4+ T cells and in CD4+ T cells from cART-suppressed people living with HIV-1 (PLWHIV). RNA sequencing analysis revealed that while overall gene expression was minimally dysregulated, DDX3 inhibition in independent donor CD4+ T cells led to significant downregulation of BIRC5 and HSPB1A, genes critical to cell survival during HIV-1 infection. We used single-cell FISH-Flow technology to characterise latency reversal and the contribution of viral RNA to inducing cell death; pharmacological targeting of DDX3 induced HIV-1 RNA expression, resulting in phosphorylation of IRF3, upregulation of IFNβ and selective induction of apoptosis in viral RNA-expressing CD4+ T cells from PLWHIV but not bystander cells. DDX3 inhibitor treatment of CD4+ T cells from PLWHIV in an in vitro culture model over five days resulted in an approximately 50% reduction of the inducible latent HIV-1 reservoir as determined by quantitation of CA HIV-1 RNA, by TILDA, as well as by FISH-Flow technology. Our data support the translation of DDX3 inhibitor class compounds into HIV-1 curative strategies and provide proof of concept for pharmacological reversal of latency coupled to induction of apoptosis towards elimination of the inducible reservoir.

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