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Next Generation Sequencing Facilitates Quantitative Analysis of WT and Il2ra mut/mut memory OT-I cell transcriptomes

ABSTRACT: Next Generation Sequencing Facilitates Quantitative Analysis of WT and Il2ra mut/mut memory OT-I cell transcriptomes

PROVIDER: PRJNA639159 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR12005450_1.fastq.gz	Fastqsanger.gz
	SRR12005450_2.fastq.gz	Fastqsanger.gz
	SRR12005451_1.fastq.gz	Fastqsanger.gz
	SRR12005451_2.fastq.gz	Fastqsanger.gz
	SRR12005452_1.fastq.gz	Fastqsanger.gz

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Next Generation Sequencing Facilitates Quantitative Analysis of WT and Il2ra mut/mut memory OT-I cell transcriptomes

Project description:Cognate antigen signals control CD8+ T cell priming, expansion size and effector versus memory cell fates, however, it is not clear whether they can also modulate the functional features of memory CD8+ T cells. We observed that OT-I cells that were primed with weak cognate antigen signals incorporate more cytokine signals, leading to a hypothesis that CD8+ T cells that receive weak TCR signals require cytokine signals to form functional memory. Using a previously described mouse model in which IL-2 signaling via its high affinity receptor CD25 is selectively impaired, the “Il2ramut/mut” mouse, we conducted a comparative analysis of gene expression and epigenetic landscape of Il2ramut/mut and WT OT-I memory cells that were primed with strong (Lm-Ova N4) versus weak (Lm-Ova T4). RNA seq data showed that both TCR and IL-2 priming signals have minimal effect on gene expression in resting memory CD8 T cells, but they significantly modify the epigenetic landscape of the memory CD8 T cells. These findings have important contributions to the current understanding of how priming signals program memory CD8 T cells in vivo.

2020-09-30 | GSE152393 | GEO

Genome wide analysis of Open Chromatin Regions in memory OT-I cells

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Effects of IL2RA non-coding and coding sequence edits on IL2RA expression in primary human T cells.

Project description:We edited an intronic IL2RA enhancer or exon in primary human naïve T cells. Electroporated cells were activated and sorted on IL2RA expression over three days. Amplicon sequencing was used to assess the effects on sequence edits on IL2RA expression.

2017-07-30 | GSE88960 | GEO

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Transcriptome-wide analysis of IL2RA enhancer activation by CRISPRa

Project description:We previously performed a tiling CRISPR activation (CRISPRa) screen in Jurkat T cells to discover enhancers controlling IL2RA expression. This screen identified six regions where recruitment of dCas9-VP64 was sufficient to drive increased expression of IL2RA. We named these putative enhancers CRISPRa Responsive Elements (CaREs). To examine transcriptome-wide consequences of dCas9-VP64 recruitment to IL2RA CaREs, we performed RNA-Seq on HuT78 cells stably expressing dCas9-VP64 and gRNAs targeting the IL2RA TSS, CaRE3, or CaRE4, or stimulated with anti-CD3/CD28 antibodies.

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Next-generation sequencing of three memory OT-I cell subsets from mice infected with Listeria monocytogenes

Project description:Purpose: RNA-seq analysis of three memory OT-I cell subsets (from a Klrg1-Cre fate reporter mouse model) isolated from the spleen of C57BL/6 mice infected with Listeria monocytogenes. The hypothesis tested in the present study was that KLRG1+ effector CD8 T lymphocytes differentiate into KLRG1- memory CD8 T lymphocytes and provide long-lasting immunity against infectious diseases and malignancies. Methods: Total RNA was obtained from FACS-purified OT-I cell subsets isolated from spleen 104 (experiment 1) and 110 days post infection (experiment 2) with ovalbumin-expressing Listeria monocytogenes (LM-OVA). Results: Using RNA-seq technology, we performed genome-wide transcriptional profiling of three memory OT-I cells (KLRG1+ Reporter+, KLRG1- Reporter+ (exKLRG1) and KLRG1- Reporter-) and identified 36 genes differentially expressed (> 1.5-fold) between exKLRG1 and KLRG1- Reporter- memory OT-I cells, and 132 differentially expressed genes between exKLRG1 and KLRG1+ Reporter+ memory OT-I cells. We then confirmed the expression of 15 genes/molecules by qRT-PCR and/or flow cytometry. Conclusions: Our study represents the first fate mapping analysis of KLRG1+ effector OT-I cells, demonstrates that KLRG1+ effector OT-I cells differentiate into all memory T cell lineages thereby promoting protective immunity. RNA-seq also identified CX3CR1 as a marker of circulating exKLRG1 early memory OT-I cells.

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Next-generation sequencing of three memory OT-I cell subsets from mice infected with vesicular stomatitis virus

Project description:Purpose: RNA-seq analysis of three memory OT-I cell subsets (from a Klrg1-Cre fate reporter mouse model) isolated from the spleen of C57BL/6 mice infected with vesicular stomatitis virus. The hypothesis tested in the present study was that KLRG1+ effector CD8 T lymphocytes differentiate into KLRG1- memory CD8 T lymphocytes and provide long-lasting immunity against infectious diseases and malignancies. Methods: Total RNA was obtained from FACS-purified OT-I cell subsets isolated from spleen 70 days post infection with ovalbumin-expressing vesicular stomatitis virus (VSV-OVA) (experiment 3). Results: Using RNA-seq technology, we performed genome-wide transcriptional profiling of three memory OT-I cells (KLRG1+ Reporter+, KLRG1- Reporter+ (exKLRG1) and KLRG1- Reporter-) and identified 36 genes differentially expressed (> 1.5-fold) between exKLRG1 and KLRG1- Reporter- memory OT-I cells, and 132 differentially expressed genes between exKLRG1 and KLRG1+ Reporter+ memory OT-I cells. We then confirmed the expression of 15 genes/molecules by qRT-PCR and/or flow cytometry. Conclusions: Our study represents the first fate mapping analysis of KLRG1+ effector OT-I cells, demonstrates that KLRG1+ effector OT-I cells differentiate into all memory T cell lineages thereby promoting protective immunity. RNA-seq also identified CX3CR1 as a marker of circulating exKLRG1 early memory OT-I cells.

2018-03-01 | GSE110706 | GEO

Aquipseudomonas alcaligenes OT 69 strain:OT 69

Project description:Aquipseudomonas alcaligenes OT 69 strain:OT 69 Genome sequencing and assembly

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