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Global transcriptional profiling changes upon knockout of USP22 in human Non-small cell lung cancer cells

ABSTRACT: The experiment was designed to display differential gene expression profiling changes in two human non-small cell lung cancer cells A549 and H1299 upon knockout of USP22 gene, by using RNAseq technology.

ORGANISM(S): Homo sapiens

PROVIDER: GSE131934 | GEO | 2019/10/01

REPOSITORIES: GEO

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Gene expression profiling associated with knockdown of RNF20 in human normal and malignant lung epithelial cell lines

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Changes in Treg gene expression upon deletion of Usp22 and Usp21

Project description:Usp22 and Usp21 are important for Foxp3 stability. We used RNA sequencing to determine the broad changes upon Usp22 and Usp21 deletionWe then performed gene expression profiling analysis using data obtained from RNA-seq and compared to each other

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Transcriptional profiling of Usp22-WT and Usp22-KO pancreatic tumor cells

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Global transcriptional profiling changes upon knockdown of LKB1 in human glioblastoma cell lines

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ACC-MESO1 cells: Control shRNA vs USP22 shRNA

Project description:USP22 plays oncogenic role and in order to study molecular mechanism of USP22 to promote tumorigenesis, microarray analysis was performed on USP22 knockdowned cells.

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USP22 controls necroptosis by regulating receptor interacting protein kinase 3 ubiquitination

Project description:Dynamic control of ubiquitination by deubiquitinating enzymes is essential for almost all biological processes. Ubiquitin-specific peptidase 22 (USP22) is part of the SAGA complex and catalyzes the removal of monoubiquitination from histone H2B, thereby regulating gene transcription. However, novel roles for USP22 have recently emerged, such as tumor development and cell death. Apart from apoptosis, the relevance of USP22 in other programmed cell death pathways still remains unclear. Here, we describe a novel role for USP22 in controlling necroptotic cell death in a variety of tumor cell lines. Loss of USP22 expression significantly delays TNF/Smac mimetic/zVAD.fmk (TBZ)-induced necroptosis, without affecting TNF-mediated NF-B activation or extrinsic apoptosis. Mass-spectrometric ubiquitin remnant profiling identified lysine 518 of Receptor-interacting protein kinase 3 (RIPK3) as USP22-dependent ubiquitination target during necroptosis induction. Mutation of K518 in RIPK3 reduced necroptosisassociated RIPK3 ubiquitination and amplified necrosome formation and necroptotic cell death. In conclusion, we identify a novel role of USP22 in necroptosis and further elucidate the relevance of ubiquitination as crucial regulator of necroptotic cell death.

2021-05-03 | PXD020909 | Pride

Usp22 depletion in E14 mouse ESCs

Project description:Mouse ESCs depleted of the epigenetic modifying enzyme Usp22 fail to differentiate properly. Ectopic expresison of Usp22 results in spontaneous differnetiation. In order to understand the transcriptional program underlying this biological defect, whole genome expression analysis was performed. E14 mESCs were infected with lentivirus containing shRNA targeting Usp22 or control (Luc). RNA was extracted from both samples and subjected to expression analysis by affymetrix array.

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Investigating the role of USP22 in reprogramming

Project description:Somatic cells can be reprogrammed to induced pluripotent stem cells (iPSCs) by overexpressing OCT4, SOX2, KLF4 and MYC. Although this cell fate transition is a slow and inefficient process, inhibiting several epigenetic barriers has shown to facilitate it. A previously employed epigenetic focused CRISPR-Cas9-mediated knockout screen during reprogramming uncovered novel human somatic cell reprogramming barriers. Here, I showed that USP22, target for gRNAs that were enriched in iPSCs from the screen, is a barrier for reprogramming and its loss is compatible with iPSC generation. Overexpressing wild-type or deubiquitinase mutant (C185A) USP22 in knockout background could rescue the phenotype. Additionally, knocking out other SAGA deubiquitinase subunits, ENY2 and ATXN7L3 did not increase the reprogramming efficiency. Mechanistically, we showed that USP22 loss upregulates an important pluripotency-related transcription factor, SOX2, expression even as early as 3 days after OSKM expression. We hypothesized that USP22 downregulates pluripotency-related gene expression during reprogramming independent from its SAGA integration and deubiquitinase activity. To address this, I will repeat rescuing USP22 knockout phenotype in reprogramming by overexpressing mutant versions of USP22 including K129R (acetyl inhibited) and HHAA (deubiqutinase). Additionally, I will check the expression of pluripotency-related genes at early time points of reprogramming upon USP22 knockout by transcriptome profiling. Lastly, I will generate USP22 knockout iPSC lines to force them to differentiation to observe if they have any problem with pluripotency exit. This work will establish a mechanistic understanding for the role USP22 play on both human somatic cell reprogramming, pluripotency and differentiation.

2023-07-31 | GSE225151 | GEO

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