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RNA-seq data from double positive thymocyte and CD4 or CD8 single positive spleen T cell

ABSTRACT: RNA-seq data from double positive thymocyte and CD4 or CD8 single positive spleen T cell

PROVIDER: PRJNA448448 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR6927752.fastq.gz	Fastqsanger.gz
	SRR6927753.fastq.gz	Fastqsanger.gz
	SRR6927754.fastq.gz	Fastqsanger.gz
	SRR6927755.fastq.gz	Fastqsanger.gz
	SRR6927756.fastq.gz	Fastqsanger.gz

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RNA-seq data from double positive thymocyte and CD4 or CD8 single positive spleen T cell

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Project description:The lifespan of double-positive (DP) thymocytes is critical for intrathymic development and shaping the peripheral T cell repertoire. However, the molecular mechanisms that control DP thymocyte survival remain poorly understood. Paxbp1 is a conserved nuclear protein that has been reported to play important roles in cell growth and development. Its high expression in T cells suggests a possible role in T cell development. Here, we observed that deletion of Paxbp1 resulted in thymic atrophy in mice lacking Paxbp1 in the early stages of T cell development. Conditional loss of Paxbp1 resulted in fewer CD4+CD8+ DP T cells, CD4 and CD8 single positive (SP) T cells in the thymus, and fewer T cells in the periphery. Meanwhile, Paxbp1 deficiency had limited effects on the CD4-CD8- double negative (DN) or immature single-positive (ISP) cell populations. Instead, we observed a significant increase in the susceptibility of Paxbp1-deficient DP thymocytes to apoptosis. Consistent with this, RNA-Seq analysis revealed a significant enrichment of the apoptotic pathway within differentially expressed genes in Paxbp1-deficient DP cells compared to control DP cells. Together, our results suggest a new function for Paxbp1, which is an important mediator of DP thymocyte survival and critical for proper thymic development.

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Project description:Here we utilized a conditional knock-out mouse model to investigate the role of Smarca5, an ISWI subfamily chromatin remodeling ATPase, during thymocyte development using hCD2-iCre transgene. We did transcriptional profiling of FACS-sorted CD4/CD8 double-positive thymocytes as this thymic population was persistent yet strongly underrepresented in adult 6-week mutant thymi. Controls included age-matched CD4/CD8 double-positive thymocytes from wild-type and tumor suppressor protein Trp53-null mice. For comparison, the Smarca5/Trp53-double-deficient thymocytes included in the experiment were partially rescued upon loss of Trp53.

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