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Cell competition regulates thymocyte turnover

ABSTRACT: Wild type thymi were transplanted into a competitive (wild type hosts), or non-competitive (Rag2-/-γc-/-KitW/Wv hosts) environment. Triple negative 2 and 3 (TN2/3) stages were sorted 14 days afetr transplantation and separated for cells of host or donor origin.

ORGANISM(S): Mus musculus

PROVIDER: GSE56418 | GEO | 2014/05/16

SECONDARY ACCESSION(S): PRJNA243283

REPOSITORIES: GEO

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Cell competition regulates thymocyte turnover

Project description:Wild type thymi were transplanted into a competitive (wild type hosts), or non-competitive (Rag2-/-γc-/-KitW/Wv hosts) environment. Triple negative 2 and 3 (TN2/3) stages were sorted 14 days afetr transplantation and separated for cells of host or donor origin. Global gene expression data for TN2/3 cells, that were young, old with, and old without competition were compared.

2014-05-16 | E-GEOD-56418 | biostudies-arrayexpress

Next generation sequencing facilliates quantitative analysis of Wild type and KitW/Wv Smooth muscle cells transcriptomes

Project description:We extracted RNA from primary smooth muscle cells from five KitW/WV mice and five Wild type mice and used next generation RNA sequenceing to compare the difference in gene expression profiles

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Bulk RNAseq analysis of CD4 CD8 double negative 3 (DN3) and CD4 CD8 double positive (DP) thymocytes in thymus autonomy and turnover

Project description:Wild type thymi were transplanted into wild recipients (turnover) or Rag2-/-gc-/- mice (autonomy) and, after 28 days of transplant, DN3 and DP thymocytes were sorted and their transcriptomes analyzed.

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Single cell RNAseq coupled with TCR repertoire analysis of thymocytes in thymus autonomy and turnover

Project description:Wild type thymi were transplanted into wild recipients (turnover) or Rag2-/-gc-/- mice (autonomy) and, after 28 days of transplant, thymocytes (double negative 3 and 4, immature CD8 single positive and CD4 CD8 double positive) were sorted and single cell RNAseq and TCR repertoire analysis performed

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Project description:This dataset consists of single-cell RNA-seq (Drop-seq) data from thymi of day 14.5 mouse embryos. The sample includes the whole thymus, including mesenchyme, endothelium, epithelium, thymocytes, and other lymphocytes. The mouse is a Rag2-/- knockout.

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Project description:Microarray experiment with whole thymi from genetically enginereed mice, with purified thymocyte samples and with cell lines.

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Project description:Thymus samples were obtained as surgical tissue discards from 3 pediatric patients (age from 7 days to 6 months) undergoing cardiac surgery at the New York Presbyterian Hospital. RNA was excracted and processed for expression analysis from 7 isolated T-Cell populations. Gene expression analysis of 7 T-Cell populations isolated from surgical samples of 3 human thymi

2011-11-05 | E-GEOD-33470 | biostudies-arrayexpress

An anti-silencer- and SATB1-dependent chromatin hub regulates Rag1 and Rag2 gene expression during thymocyte development

Project description:Rag1 and Rag2 gene expression in CD4+CD8+ double positive (DP) thymocytes depends on the activity of a distant anti-silencer element (ASE) that counteracts the activity of an intergenic silencer. However, the mechanistic basis for ASE activity is unknown. Here we show that the ASE physically interacts with the distant Rag1 and Rag2 gene promoters in DP thymocytes, bringing the two promoters together to form an active chromatin hub. Moreover, we show that the ASE functions as a classical enhancer that can potently activate these promoters in the absence of the silencer or other locus elements. In thymocytes lacking the chromatin organizer SATB1, we identified a partial defect in Tcra gene rearrangement that was associated with reduced expression of Rag1 and Rag2 at the DP stage. SATB1 binds to the ASE and Rag promoters, facilitating inclusion of Rag2 in the chromatin hub and the loading of RNA polymerase II to both the Rag1 and Rag2 promoters. Our results provide a novel framework for understanding ASE function and demonstrate a novel role for SATB1 as a regulator of Rag locus organization and gene expression in DP thymocytes. Sequencing of Satb1-ChIP and input control from 6 wk old thymus

2015-02-25 | E-GEOD-66248 | biostudies-arrayexpress

An anti-silencer- and SATB1-dependent chromatin hub regulates Rag1 and Rag2 gene expression during thymocyte development

2015-02-25 | GSE66248 | GEO

The HDAC inhibitor panobinostat (LBH589) inhibits Acute Lymphoblastic leukemia (ALL) in vitro and in vivo in a new characterized human ALL mice model (ALL-B and ALL-T)

Project description:Histone deacetylases (HDACs) have been identified as therapeutic targets due to regulatory function in DNA structure and organization. We have analyzed the role of the LBH589, a novel pan inhibitor of class I and II HDACs, in Acute Lymphoblastic Leukemia. In vitro, LBH589 was shown to induce a dose dependent antiproliferative and apoptotic effect which was associated with an increase in the acetylation of H3 and H4 histone acetylation which was uniformly in every genetic subgroup of ALL. In vivo administration of LBH589 in BALB/c-RAG2-/-γc-/- mice in which T and B-cell leukemic cell lines were injected induced a significant reduction in tumor growth (TOM-1, p<0.01 and MOLT-4 p<0.05). Leukemic cells from patients were employed to establish a xenograft model of human leukemia in BALB/c-RAG2-/-γc-/- mice and further transplanted in consecutive generations of mice. Treatment of these xenografts with LBH589 induced an increase in the acetylation of H3 and H4 and prolonged the survival of mice in comparison with the animals treated with Vincristine and Dexametasone (p<0.05) and this effect was significantly higher when LBH589 was combined with Vincristine and Dexametasone (p<0.001). Our results that the use of LBH589 in combination with standard chemotherapy represents an attractive option for treatment of patients with ALL. Two primary samples of ALL (one ALL-B and one ALL-T) and two samples of each leukemia after passages in immunodeficient mice.

2012-04-17 | E-GEOD-26789 | biostudies-arrayexpress

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