Glucocorticoids regulate murine megakaryocyte transcriptome
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ABSTRACT:
PROVIDER: PRJNA817170 | ENA |
REPOSITORIES: ENA
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Project description:Total RNA from in vitro-differentiated murine megakaryocytes incubated for 6hr with 100nM dexamethasone or its vehicle was analyzed using a genome-wide expression microarray using Affymetrix Mouse Transcriptome Array 1.0 arrays.
2023-06-26 | GSE198800 | GEO
Project description:About 10% of Down syndrome (DS) infants are born with a myeloproliferative disorder (DS-TMD) that spontaneously resolves within the first few months of life. About 20-30% of these infants subsequently develop acute megakaryoblastic leukemia (DS-AMKL). In order to understand differences that may exist between fetal and bone marrow megakaryocyte progenitor cell populations we flow sorted megakaryocyte progenitor cells and performed microarray expression analysis. kewywords: Mouse megakaryocyte progenitors Expression data of flow cytometrically isolated murine megakaryocyte progenitor cells (lin-, Sca-1-, c-kit+, CD150+, CD41+) from C57/BL6 murine fetal liver and bone marrow
2013-03-29 | E-GEOD-45618 | biostudies-arrayexpress
Project description:About 10% of Down syndrome (DS) infants are born with a myeloproliferative disorder (DS-TMD) that spontaneously resolves within the first few months of life. About 20-30% of these infants subsequently develop acute megakaryoblastic leukemia (DS-AMKL). In order to understand differences that may exist between fetal and bone marrow megakaryocyte progenitor cell populations we flow sorted megakaryocyte progenitor cells and performed microarray expression analysis. kewywords: Mouse megakaryocyte progenitors Expression data of flow cytometrically isolated murine megakaryocyte progenitor cells (lin-, Sca-1-, c-kit+, CD150+, CD41+) from GATA1s fetal liver and bone marrow
2013-03-29 | E-GEOD-45619 | biostudies-arrayexpress
Project description:MicroRNAs are small non-coding RNAs that regulate cellular development by interfering with mRNA stability and translation. We defined the kinetics of global microRNA expression during the differentiation of murine hematopoietic progenitors into megakaryocytes. Of 435 miRNAs analyzed, 13 were upregulated and 81 were downregulated. Many of these changes are consistent with miRNA profiling studies of human megakaryocytes and platelets, although new patterns also emerged. Among 7 conserved miRNAs that were upregulated most strongly in megakaryocytes, 6 were also induced in the related erythroid lineage. MiR-146a was strongly upregulated during mouse and human megakaryopoiesis, but not erythropoiesis. However, overexpression of miR-146a in mouse bone marrow hematopoietic progenitor populations produced no detectable alterations in megakaryocyte development or platelet production in vivo or in colony assays. Our findings extend the repertoire of differentially regulated miRNAs during murine megakaryopoiesis and provide a useful new dataset for hematopoiesis research. In addition, we show that enforced hematopoietic expression of miR-146a has minimal effects on megakaryopoiesis. These results are compatible with prior studies indicating that miR-146a inhibits megakaryocyte production indirectly by suppressing cytokine production from innate immune cells, but cast doubt on a different study, which suggests that this miRNA inhibits megakaryopoiesis cell-autonomously.
2010-12-07 | GSE22480 | GEO
Project description:MicroRNAs are small non-coding RNAs that regulate cellular development by interfering with mRNA stability and translation. We defined the kinetics of global microRNA expression during the differentiation of murine hematopoietic progenitors into megakaryocytes. Of 435 miRNAs analyzed, 13 were upregulated and 81 were downregulated. Many of these changes are consistent with miRNA profiling studies of human megakaryocytes and platelets, although new patterns also emerged. Among 7 conserved miRNAs that were upregulated most strongly in megakaryocytes, 6 were also induced in the related erythroid lineage. MiR-146a was strongly upregulated during mouse and human megakaryopoiesis, but not erythropoiesis. However, overexpression of miR-146a in mouse bone marrow hematopoietic progenitor populations produced no detectable alterations in megakaryocyte development or platelet production in vivo or in colony assays. Our findings extend the repertoire of differentially regulated miRNAs during murine megakaryopoiesis and provide a useful new dataset for hematopoiesis research. In addition, we show that enforced hematopoietic expression of miR-146a has minimal effects on megakaryopoiesis. These results are compatible with prior studies indicating that miR-146a inhibits megakaryocyte production indirectly by suppressing cytokine production from innate immune cells, but cast doubt on a different study, which suggests that this miRNA inhibits megakaryopoiesis cell-autonomously. Exiqon locked nucleic acid (LNA) microarrays were used to compare microRNA expression in starting populations (ter 119- progenitors) and purified megakaryocytes. Day13.5-14.5 murine fetal livers (strain CD1) were depleted of erythroid cells and cultured with thrombopoietin to generate megakaryocytes. Each total RNA sample (0.5 μg per reaction) was labeled with Hy3 and Hy5 dyes using the Exiqon Power Labeling Kit and automated microarray hybridizations and washes were performed on a Tecan HS4800 station with 20 hr hybridization at 56ºC. Dye-swap pairs of three replicate experiments comparing Ter119- fetal liver cells vs. BSA-purified megakaryocytes were co-hybridized to six arrays. The geometric average of the 532 and 635 measurements after normalization was determined for each sample.
2010-12-07 | E-GEOD-22480 | biostudies-arrayexpress
Project description:This study aims to identify all genes expressed in primary mouse megakaryocytes Keywords: Megakaryocyte, SAGE, transcriptome analysis
2007-02-03 | GSE6940 | GEO
Project description:This study aims to identify all genes expressed in primary mouse megakaryocytes Keywords: Megakaryocyte, SAGE, transcriptome analysis Mouse megakaryocytes were grown in vitro from bone marrow progenitors. Mature, polyploid (approximately 95% 64n and 128n) differentiated megakaryocytes were used to generate RNA for SAGE library construction.
2007-02-02 | E-GEOD-6940 | biostudies-arrayexpress
Project description:G1ME cells are GATA1-deficient murine bipotential megakaryocyte/erythrocyte progenitor cells derived from Gata1-negative murine ES cells. In order to assess the impact of GATA1 on gene regulation and cell differentiation, an expression construct was used to transiently produce high levels of GATA1. Cells transduced with this construct or a vector control were harvested at 18 and 42 hours, and gene expression was analyzed using Affymetrix MOE430 version 2 arrays.
2009-06-10 | GSE14980 | GEO
Project description:Megakaryocyte derived immunoregulatory cells regulate host-defense immunity against bacterial pathogens
| PRJNA706584 | ENA
Project description:Sp1 and Sp3 belong to the Specificity proteins (Sp)/Krüppel-like transcription factor family. They are closely related, ubiquitously expressed and recognize G-rich DNA motifs. They are thought to regulate generic processes such as cell cycle and growth control, metabolic pathways and apoptosis. Ablation of Sp1 or Sp3 in mice is lethal, and combined haploinsufficiency results in hematopoietic defects during the fetal stages. Here, we show that in adult mice conditional ablation of either Sp1 or Sp3 has minimal impact on hematopoiesis, while the simultaneous loss of Sp1 and Sp3 results in severe macrothrombocytopenia and platelet dysfunction. We employed flow cytometry, cell culture and electron microscopy and show that although megakaryocyte numbers are normal in bone marrow and spleen, they display a less compact demarcation membrane system and a striking inability to form proplatelets. Through megakaryocyte transcriptomics and platelet proteomics we identified several cytoskeleton-related proteins and downstream effector kinases, including Mylk, that were downregulated upon Sp1/Sp3 depletion, providing an explanation for the observed defects in megakaryopoiesis. We show that Mylk is required for proplatelet formation and stabilization and for ITAM-receptor mediated platelet aggregation. Our data highlights the specific vs generic role of these ubiquitous transcription factors in the highly specialized megakaryocytic lineage. Megakaryocyte mRNA profiles of Sp1fl/fl::Sp3fl/fl (WTlox) and Pf4-Cre::Sp1fl/fl::Sp3fl/fl (dKO) mice were generated by deep sequencing, in triplicate.
2014-12-18 | E-GEOD-58707 | biostudies-arrayexpress