Aberrations in epigenetic processes, such as histone methylation, can lead to cancer. Retinoblastoma Binding Protein 2 (RBP2)(also called JARID1A or KDM5A) can demethylate tri- and di-methylated lysine 4 in histone H3, which are epigenetic marks for transcriptionally active chromatin, whereas the MEN1 tumor suppressor promotes H3K4 methylation. Previous studies suggested that inhibition of RBP2 contributed to tumor suppression by pRB. Here we show RBP2 loss promotes cellular differentiation in vitro. We use mouse expression array 430 2.0 array to profile gene expression patterns of Rbp2f/f and Rbp2-/- ES cells in ES cell medium and after 6 days in ES cell medium without LIF.
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Specimen part
View SamplesPeripheral tolerance induction is critical for the maintenance of self-tolerance and can be mediated by immunoregulatory T cells or by direct induction of T cell anergy or deletion. While the molecular processes underlying anergy have been extensively studied, little is known about the molecular basis for peripheral T cell deletion. Here, we determined the gene expression signature of peripheral CD8+ T cells undergoing deletional tolerance, relative to those undergoing immunogenic priming or lymphopenia-induced proliferation. From these data, we report the first detailed molecular signature of cells undergoing deletion.
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View SamplesTissue macrophages from peritoneal cavity, lung, liver, spleen, small intestine and adipose tissue and M-CSF derived bone marrow derived macrophages (BMDMs) were determined for gene expression.
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Sex, Specimen part
View SamplesMicroarray analysis of Myd88-/-Trif-/- and Myd88-/-Rip2-/- macrophage responses to WT or dotA mutant L. pneumophila.
Type IV secretion-dependent activation of host MAP kinases induces an increased proinflammatory cytokine response to Legionella pneumophila.
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View SamplesMicroRNAs comprise 1-3% of all vertebrate genes, but their in vivo functions and mechanisms of action remain largely unknown. Zebrafish miR-430 is expressed at the onset of zygotic transcription and regulates morphogenesis during early development. Using a microarray approach and in vivo target validation, we find that miR-430 directly regulates several hundred target mRNAs. Targets are highly enriched for maternal mRNAs that accumulate in the absence of miR-430. We also show that miR-430 accelerates the deadenylation of target mRNAs. These results suggest that miR-430 facilitates the deadenylation and clearance of maternal mRNAs during early embryogenesis.
Zebrafish MiR-430 promotes deadenylation and clearance of maternal mRNAs.
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View SamplesMemory B cells play essential roles in the maintenance of long-term immunity and may be important in the pathogenesis of autoimmune disease, but how these cells are distinguished from their nave precursors is poorly understood. To address this, it would be important to understand how gene expression differs between memory and naive B cells in order to elucidate memory-specific functions. Using model systems that help overcome the lack of murine memory-specific markers and the low frequency of antigen-specific memory and nave cells, we undertook a global comparison of gene expression between memory B cells and their naive precursors.
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View SamplesMRL/Faslpr mice is a lupus prone strain that exhibits lupus disease features at 12-16 weeks of age, including high-titer circulating anti-DNA antibodies, splenomegaly, lymphadnopathy, skin lesions, and IgG deposits in the kidney. At 16-24 weeks of age, CD4+ B220- CD44+ T cells were sorted into three populations based on the expression of two cell surface molecules, CD62L and PSGL1. CD62Lhi PSGL1hi, CD62Llo PSGL1hi, and CD62Llo PSGL1lo CD4+ T cells were isolated directly ex vivo. There was no treatment given to the animals. Naive (CD62Lhi CD44lo) CD4+ B220- T cells were isolated from young 6-8 week old female mice for comparison.
In vivo regulation of Bcl6 and T follicular helper cell development.
Specimen part
View SamplesGene expressions of murine germinal center and naive B cells on Affymetrix platform
Multiple transcription factor binding sites predict AID targeting in non-Ig genes.
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View SamplesHematopoietic stem cells purified from +/+, +/- and -/- ADAR1 mice were compared with global gene expression analysis.
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View SamplesAt the peak of the CD8 T cell response to acture viral and bacterial infections, expression of the Interleukin-7 Receptor (IL-7R) marks Memory Precursor Effector CD8 T Cells (MPECs) from other Short-Lived Effector CD8 T cells (SLECs), which are IL-7Rlo. This study was designed to determine the gene expression differences between these two subsets of effector CD8 T cells.
Inflammation directs memory precursor and short-lived effector CD8(+) T cell fates via the graded expression of T-bet transcription factor.
Sex, Specimen part
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