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Genome-wide CRISPR/Cas9 Screens Reveal Shared and Bespoke Mechanisms of Resistance to SHP2 Inhibition [RNA-seq]

ABSTRACT: Genome-wide CRISPR/Cas9 Screens Reveal Shared and Bespoke Mechanisms of Resistance to SHP2 Inhibition [RNA-seq]

PROVIDER: PRJNA874681 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR21291969_1.fastq.gz	Fastqsanger.gz
	SRR21291969_2.fastq.gz	Fastqsanger.gz
	SRR21291970_1.fastq.gz	Fastqsanger.gz
	SRR21291970_2.fastq.gz	Fastqsanger.gz
	SRR21291971_1.fastq.gz	Fastqsanger.gz

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Genome-wide CRISPR/Cas9 Screens Reveal Shared and Bespoke Mechanisms of Resistance to SHP2 Inhibition

Project description:Genome-wide CRISPR/Cas9 Screens Reveal Shared and Bespoke Mechanisms of Resistance to SHP2 Inhibition

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Genome-wide CRISPR/Cas9 Screens Reveal Shared and Bespoke Mechanisms of Resistance to SHP2 Inhibition [RNA-seq]

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Project description:Genome-wide CRISPR/Cas9 Screens Reveal Shared and Bespoke Mechanisms of Resistance to SHP2 inhibition [CRISPR genomic screen]

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CRISPR Cas9 screens for drug resistance in AML cell lines

Project description:Acute myeloid leukaemia (AML) continues to have a very high mortality and its treatment hasnot changed for more than 20 years.Here, we propose to apply genomic-wide screens to directly identify therapeutic vulnerabilitiesof AML using AML cells lines with pre-defined somatic mutations. Our studies will be basedon genome-wide CRISPR/CAs9 gRNA screens and will be used to identify drivers of drugresistance to standard chemotherapies.This data is part of a pre-publication release. For information on the proper use of pre-publication data shared by the Wellcome Trust Sanger Institute (including details of any publication moratoria), please see http://www.sanger.ac.uk/datasharing/

2015-02-03 | E-ERAD-335 | biostudies-arrayexpress

MULTIMODAL STIMULATION SCREENS REVEAL UNIQUE AND SHARED GENES LIMITING T-CELL FITNESS

Project description:T-cell dysfunction genes limit antitumor activity and may serve as therapeutic targets. It has not been systematically studied whether there are regulators that either uniquely or broadly contribute to T-cell fitness. We performed genome-scale CRISPR/Cas9 knockout screens in primary CD8 T-cells to uncover genes negatively impacting on fitness upon three modes of stimulation: (1) intense stimulation, triggering activation-induced cell death (AICD); (2) acute stimulation, triggering T-cell expansion; (3) chronic stimulation, causing dysfunction. Besides established regulators, we uncovered genes controlling T-cell fitness either specifically or commonly upon differential stimulation. Dap5 ablation, ranking highly in all three screens, increased translation while enhancing tumor killing. Loss of Icam1-mediated homotypic T-cell clustering amplified T-cell expansion and effector functions after both acute and intense stimulation. Lastly, Ctbp1 inactivation induced functional T-cell persistence exclusively upon chronic stimulation. Our results functionally annotate fitness regulators based on their unique or shared contribution to traits limiting T-cell antitumor activity.

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Genome-wide CRISPR/Cas9 screens reveal shared and cell-specific mechanisms of resistance to SHP2 inhibition.

Project description:SHP2 (PTPN11) acts upstream of SOS1/2 to enable RAS activation. Allosteric SHP2 inhibitors (SHP2i) in the clinic prevent SHP2 activation, block proliferation of RTK- or cycling RAS mutant-driven cancers, and overcome "adaptive resistance." To identify SHP2i resistance mechanisms, we performed genome-wide CRISPR/Cas9 knockout screens on two SHP2i-sensitive cell lines, recovering genes expected to cause resistance (NF1, PTEN, CDKN1B, LZTR1, and RASA2) and novel targets (INPPL1, MAP4K5, epigenetic modifiers). We screened 14 additional lines with a focused CRISPR library targeting common "hits" from the genome-wide screens. LZTR1 deletion conferred resistance in 12/14 lines, followed by MAP4K5 (8/14), SPRED2/STK40 (6/14), and INPPL1 (5/14). INPPL1, MAP4K5, or LZTR1 deletion reactivated ERK signaling. INPPL1-mediated sensitization to SHP2i required its NPXY motif but not lipid phosphatase activity. MAP4K5 acted upstream of MEK through a kinase-dependent target(s); LZTR1 had cell-dependent effects on RIT and RAS stability. INPPL1, MAP4K5, or LZTR1 deletion also conferred SHP2i resistance in vivo. Defining the SHP2i resistance landscape could suggest effective combination approaches.

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Genome-wide CRISPR-Cas9 screens reveal loss of redundancy between PKMYT1 and WEE1 in Glioblastoma stem-like cells

Project description:To identify new therapeutic targets for Glioblastoma (GBM), we performed genome-wide CRISPR-Cas9 "knockout" (KO) screens in patient-derived GBM stem-like cells (GSCs) and human neural stem/progenitors (NSCs), non-neoplastic stem cell controls, for genes required for their in vitro growth. Surprisingly, the vast majority GSC-lethal hits were found outside of molecular networks commonly altered in GBM and GSCs (e.g., oncogenic drivers). In vitro and in vivo validation of GSC-specific targets revealed several strong hits, including the wee1-like kinase, PKMYT1/Myt1. Mechanistic studies demonstrated that PKMYT1 acts redundantly with WEE1 to inhibit Cyclin B-CDK1 activity via CDK1-Tyr15 phosphorylation and to promote timely completion of mitosis in NSCs. However, in GSCs, this redundancy is lost, likely as a result of oncogenic signaling, causing GBM-specific lethality. A whole-genome CRISPR-Cas9 knockout screens targeting over 18,000 genes using the all-in-one LV-sgRNA:Cas9 platform system were performed using a âshot gunâ approach by transducing 2 GBM patient-derived isolates and 2 human neural stem cell isolates with the pool library (2 biological replicates), and cultures were outgrown for ~3 weeks. The end time point of each screen was compared to day 0 in order to determine which sgRNAs were overrepresented or underrepresented in the population.

2016-02-15 | E-GEOD-70038 | biostudies-arrayexpress

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