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ROR훾t directs upregulation of RAG gene expression in DP thymocytes and serves as a multi-faceted regulator of the Tcra repertoire.

ABSTRACT: ROR훾t directs upregulation of RAG gene expression in DP thymocytes and serves as a multi-faceted regulator of the Tcra repertoire.

PROVIDER: PRJNA936847 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR23557358_1.fastq.gz	Fastqsanger.gz
	SRR23557358_2.fastq.gz	Fastqsanger.gz
	SRR23557359_1.fastq.gz	Fastqsanger.gz
	SRR23557359_2.fastq.gz	Fastqsanger.gz
	SRR23557360_1.fastq.gz	Fastqsanger.gz

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ROR t directs upregulation of RAG gene expression in DP thymocytes and serves as a multi-faceted regulator of the Tcra repertoire.

Project description:Naik et al. show that RAG gene upregulation in DP Thymocytes is controlled by DPASE, a DP-specific open chromatin region in RAG locus. Reduced RAG expression in DPASE KO mice result delayed and incomplete Tcra recombination. Transcription factor RORyt binds to DPASE and Tcra enhancer to regulate Tcra recombination in DP thymocytes.

2023-02-20 | GSE225627 | GEO

Expression profile of bcl11b-/- preselected DP thymocytes

Project description:Review on the role of Bcl11b in thymus and periphery and impact on diseases RNA was extracted from DP thymocytes of bcl11bf/fCd4cre/tcra-/- and tcra-/- mice. Tcra-/- mice only have preselected DP thymocytes. Such mice were used to determine the role of Bcl11b before selection, considering the defective positive selection in bcl11bf/fcd4cre mice. RNA was isolated and submitted for library generation and microarray analysis to determine expression profile of bcl11b-/- preselected DP thymocytes.

2014-04-12 | E-GEOD-56714 | biostudies-arrayexpress

Expression data from BDC2.5 TCR Tg, preselected Rag-/-.B6 and Rag-/-.NOD.H2b thymocytes upon antigenic stimulation

Project description:The aim of this study was to quantify the impact of NOD genetic vatiation on thymic negative selection transcriptional programs. Pre-selected BDC2.5 TCR Tg DP thymocytes from non-selecting B6 and NOD.H2b backgrounds were purified (Dynal CD8 FlowComp), mixed in a 1:1 ratio and stimulated with BDC mimotope-loaded TCRa-/-/NOD splenocytes for indicated periods of time and double sorted by FACS as Thy1.2+Dump-CD4+CD8+; Dump includes CD19, Gr1, CD11b, CD11c, CD49b. Following cell sorting into trizol, RNA was purified, labeled and hybridized to Affymetrix arrays. experiment type: unstimulated versus stimulated BDC/B6.Rag-/- and BDC/NOD.H2b.Rag-/- DP thymocytes

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Effect of c-Myb deficiency on pre-selection DP thymocytes

Project description:Comparing the mRNA expression profiles of c-Myb deficient and c-Myb sufficient Tcra-/- DP thymocytes. Results provide insight into the role of c-Myb in the regulation of survival and differentiation during the pre-selection DP stage where c-Myb expression is abundant during T cell development. DP thymocytes were purified from four c-Myb deficient and four c-Myb sufficient mice over magnetic columns. RNA from each biological replicate was individually hybridized onto a total of eight MOE430 2.0 Chips.

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Tcrd rearrangement redirects a processive Tcra recombination program to expand the Tcra repertoire

Project description:The Tcra-Tcrd locus undergoes Tcrd rearrangement in DN thymocytes followed by primary and secondary Tcra rearrangements in DP thymocytes. Here we reveal the mechanisms underpinning combinatorial diversity in the Tcra repertoire. We show that V-alpha and J-alpha segments on individual Tcra alleles are used in stepwise and coordinated proximal-to-distal progressions during primary and secondary rearrangements, substantially constraining combinatorial diversity. Notably, Tcrd recombination in DN thymocytes diversifies the Tcra repertoire by truncating the V-alpha array to permit otherwise disfavored V-J combinations. Such diversification is important, because Trav1-Traj33+ mucosa-associated invariant T cells are depleted when Tcrd rearrangement is impaired. Our results reveal an important biological advantage conferred by the nested organization of Tcrd and Tcra gene segments.

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murine DP thymocytes transcriptome

Project description:murine DP thymocytes transcriptome

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Loss of Zfp335 triggers cGAS/STING-dependent apoptosis of post-B-selection pre-T cells [TCRa-seq]

Project description:The transcription factor Zfp335 is esstential for the survival of post-B-selection DN4 thymocytes. We utilized TCRa repertoire sequencing to assess alterations to survival duration for Zfp335-deficient DP thymocytes.

2022-09-13 | GSE205323 | GEO

E protein binding at the Tcra enhancer promotes Tcra repertoire diversity

Project description:The Tcra gene enhancer (Eα) is required for Tcra rearrangment. Our study assesses the role of E protein binding at Eα. Tcra repertoire sequencing was used to determine whether loss of Eα E protein binding sites alters recombination at Tcra.

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Project description:T cell-specific deletion of PTEN induces premalignancy in CD4+ CD8+ (DP) immature T cells in the thymus, which progresses to the development of mature CD4+ T cell lymphomas in the lymph nodes and spleen. As part of a screen to identify factors that inhibit progression to malignancy, we compared miRNA expression in premalignant PTEN-deficient DP thymocytes versus wild-type controls.

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