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HDAC3 restrains cytokine signaling during thymocyte development for the generation of CD4 T cells (ChIP-Seq)

ABSTRACT: HDAC3 restrains cytokine signaling during thymocyte development for the generation of CD4 T cells (ChIP-Seq)

PROVIDER: PRJNA431334 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR6504930_1.fastq.gz	Fastqsanger.gz
	SRR6504930_2.fastq.gz	Fastqsanger.gz
	SRR6504931_1.fastq.gz	Fastqsanger.gz
	SRR6504931_2.fastq.gz	Fastqsanger.gz
	SRR6504932_1.fastq.gz	Fastqsanger.gz

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HDAC3 restrains cytokine signaling during thymocyte development for the generation of CD4 T cells (RNA-Seq)

Project description:HDAC3 restrains cytokine signaling during thymocyte development for the generation of CD4 T cells (RNA-Seq)

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HDAC3 restrains cytokine signaling during thymocyte development for the generation of CD4 T cells (ChIP-Seq)

Project description:CD4 and CD8 T cells are vital components of the immune system. According to the kinetic signaling model, commitment to the CD4 or CD8 lineage is determined by whether persistent TCR signaling or cytokine signaling predominates, respectively. We found histone deacetylase 3 (HDAC3) is critical for the development of CD4 T cells, as its deletion leads to the generation of only CD8SP thymocytes. In the absence of HDAC3, MHC Class II-restricted OT-II thymocytes are redirected to the CD8 cytotoxic lineage. Analysis of histone acetylation and RNA-seq reveals HDAC3-deficient DP thymocytes are biased towards the CD8 lineage prior to positive selection. In addition, HDAC3-deficient DP thymocytes have increased IL-21R expression and STAT5 activation. As a result, HDAC3 is required to restrain cytokine signaling in DP thymocytes and is required for the generation of CD4 T cells.

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Project description:Mouse thymocytes can be classified into four major subsets based on expression of CD4 and CD8 co-receptors. CD4-CD8- (double negative, DN) cells become CD4+CD8+ (double positive, DP) cells following productive T cell receptor (TCR) beta chain rearrangement. A small proportion of DP cells are selected through interaction of clonal TCRalpha/beta and MHC self peptide complex expressed on thymic stromal cells. DP cell expressing MHC class I-restricted TCR become CD4-CD8+ cells, which will finally differentiate into cytotoxic T cells, while MHC class II restricted selection generates CD4+CD8- helper lineage T cells. We used microarrays to identify genes important for thymocyte differentiation and lineage determination by profiling gene expression in different thymocyte subsets. Mouse thymocytes were divided into four subsets based on CD4, CD8a, and TCRb expression and purified by flw cytometry. FACS purified DN (CD4-CD8a-TCRb-), DP (CD4+CD8a+), CD4SP (CD4+CD8a-TCRbhi) and CD8SP (CD4-CD8a+TCRbhi) populations were lysed in Trizol, and provided to the Genomics Core Facility of the Memorial Sloan-Kettering Cancer Center (MSKCC) for quality control, quantification, reverse transcription, labeling and hybridization to MOE430A 2.0 microarray chips (Affymetrix). Arrays were scanned per the manufacturer’s specifications for the Affymetrix MOE430v2 chip.

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