Mus musculus
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA172416 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:We used microarrays to look at overall gene expression differences between miR-155-/- and WT dendritic cells under inflammatory conditions. Bone marrow from either wild type or miR-155-/- C57Bl/6 mice was differentiated into dendritic cells by incubating with GM-CSF. These cells were then stimulated with LPS, and gene expression was performed.
2010-08-16 | E-GEOD-23641 | biostudies-arrayexpress
Project description:Kinetics of M-CSF cultured and LPS stimulated WT and miR-155 KO Macrophages.
| PRJNA172417 | ENA
Project description:Toll-like receptor (TLR)-induced maturation of dendritic cells (DCs) leads to the production of proinflammatory cytokines as well as the upregulation of various molecules involved in T cell activation. These are believed to be the critical events that account for the induction of the adaptive immune response. Here, we have examined the role of micro-RNA-155 (miR-155) in DC function and the induction of immunity. Using a model where the transfer of self-antigen-pulsed, TLR-matured DCs can induce a functional CD8 T cell response and autoimmunity, we find that DCs lacking miR-155 have an impaired ability to break immune tolerance. Importantly, transfer of self- antigen-pulsed DCs overexpressing miR-155 was sufficient to break tolerance in the absence of TLR stimuli. Although these unstimulated DCs induced T cell function in vivo, there was no evidence for the upregulation of costimulatory ligands or cytokine secretion. Further analysis showed that miR-155 influenced the level of the phosphatase SHIP1 in DCs, and that the lack of SHIP1 in DCs was sufficient to break T cell tolerance in vivo, again in the absence of TLR induced DC maturation. Our study demonstrates that the overexpression of miR-155 in DCs is a critical event that is alone sufficient to break self tolerance and promote a CD8-mediated autoimmune response in vivo. This process is independent of the induction of conventional DC maturation markers, indicating that miR-155 regulation of SHIP represents a unique axis that regulates DC function in vivo. Dendritic cell culture: Bone marrow was flushed from tibias and femurs of mice with HBSS. Bone marrow cells were cultured at 2x106 cells/ml in 10 ml non-tissue culture treated dishes in RPMI 1640 containing 10% LPS-free FBS, Penicillin:streptomycin glutamine 2-mercaptoethanol (cRPMI), with 40ng/ml murine GM-CSF (Peprotech). On day 3 of cultures 10ml of fresh media was added also containing 40ng/ml GM-CSF. On days 6 and 8, 10ml of media was removed and centrifuged to collect cells, which were resuspended in 10ml fresh media containing GM-CSF and were added back to dishes. Non-adherent cells were isolated on day 9. DCs were plated in 24-well plates at 2x106 cells/ml in 1ml of cRPMI with or without the class B CpG ODN1826 (ACGT DNA Technologies corporation, Toronto, ON, Canada) at 10?M final concentration overnight. Array analysis of mi-RNA expression: BMDCs from WT mice were either stimulated with CpG or left in media alone overnight. Whole RNA was isolated using mirVana miRNA isolation kit following the manufacturers instructions. RNA samples were labeled and hybridized to Agilent mouse miRNA 8x15K arrays (Agilent). Data was generated from 8 individual samples (4 unstimulated and 4 CpG-treated).
2015-09-04 | E-GEOD-72716 | biostudies-arrayexpress
Project description:We identify a panel of microRNAs that are differentially expressed during both spontaneous and LPS-induced DC maturation and show the M-CSF receptor (M-CSFR) as a key target for microRNA-mediated regulation. MicroRNA-22, -34a and -155 are up-regulated in mature GM-CSF-generated DC and mediate M-CSFR mRNA and protein down-regulation.
2013-11-04 | E-MEXP-3311 | biostudies-arrayexpress
Project description:Human monocyte-derived DC were cultured at a density of 0.5x10E6 cells/ml in RPMI-1640 supplemented with 10% FCS, 1% Pen/Strep, 10 ng/ml GM-CSF and 10 ng/ml IL4. At day 7, they were stimulated or not with 500 ng/ml LPS. Cells were collected at day 10.
Whole cell lystaes from 2x10E8 cells were used for immunoprecipiation with PU.1 (T-21 SantaCruz) antibody. IgG was used as control.
2018-11-30 | MSV000083175 | MassIVE
Project description:Mammalian microRNAs (miRNAs) are emerging as key regulators of the development and function of the immune system. Here, we report a strong but transient induction of miR-155 in mouse bone marrow after injection of bacterial lipopolysaccharide (LPS) correlated with granulocyte/monocyte (GM) expansion. Demonstrating the sufficiency of miR-155 to drive GM expansion, enforced expression in mouse bone marrow cells caused GM proliferation in a manner reminiscent of LPS treatment. However, the mir-155-induced GM populations displayed pathological features characteristic of myeloid neoplasia. Extending possible relevance to human disease, miR-155 was overexpressed in the bone marrow of patients with acute myeloid leukemia (AML). Furthermore, miR-155 repressed a subset of genes implicated in hematopoietic development and disease. These data implicate miR-155 as a contributor to physiological GM expansion during inflammation and to certain pathological features associated with AML, emphasizing the importance of proper miR-155 regulation in developing myeloid cells during times of inflammatory stress. Keywords: genetic modification
2008-03-24 | GSE10467 | GEO
Project description:Purpose: The goals of this study are to compare NGS-derived GM-CSF-cultured bone marrow derived cells transcriptome profiling (RNA-seq) normalized counts and differential expression of genes between different stimulations (untreated, Beauvericin, LPS or Beauvericin with LPS). Methods: mRNA profiles of GM-CSF-cultured bone marrow derived FACS purified MHCII high CD11c+ cells from wild-type C57BL/6N mice that were left untreated or stimulated with Beauvericin, LPS or Beauvericin with LPS for 4h were generated by deep sequencing, in quadruplicate, using the Illumina NextSeq550 system. DNase digested total RNA samples used for transcriptome analyses were quantified (Qubit RNA HS Assay, Thermo Fisher Scientific) and quality measured by capillary electrophoresis using the Fragment Analyzer and the ‘Total RNA Standard Sensitivity Assay’ Results: The reads of all probes were adapter trimmed (Illumina TruSeq). Mapping was done against the Mus musculus (mm39; GRCm39) (June 24, 2020) genome sequence. After grouping of samples (four biological replicates each) according to their respective experimental condition, multi-group comparisons were made and statistically determined using DESeq2. The Resulting P values were corrected for multiple testing by FDR. A P value of <0.05 was considered significant. Conclusions: Our study represents the first detailed analysis of untreated and Beauvericin stimulated GM-CSF-cultured bone marrow derived cells transcriptomes.Our results show that NGS offers a comprehensive and more accurate quantitative and qualitative evaluation of mRNA content within GM-CSF-cultured bone marrow derived cells. We conclude that Beauvericin activates GM-CSF-cultured bone marrow derived cells inducing inflammatory cytokine,chemokine and Type I IFN production via a TLR4 dependent signaling pathway, but induces a gene expression profile different from LPS.
2022-04-08 | GSE192689 | GEO
Project description:Mammalian microRNAs (miRNAs) are emerging as key regulators of the development and function of the immune system. Here, we report a strong but transient induction of miR-155 in mouse bone marrow after injection of bacterial lipopolysaccharide (LPS) correlated with granulocyte/monocyte (GM) expansion. Demonstrating the sufficiency of miR-155 to drive GM expansion, enforced expression in mouse bone marrow cells caused GM proliferation in a manner reminiscent of LPS treatment. However, the mir-155-induced GM populations displayed pathological features characteristic of myeloid neoplasia. Extending possible relevance to human disease, miR-155 was overexpressed in the bone marrow of patients with acute myeloid leukemia (AML). Furthermore, miR-155 repressed a subset of genes implicated in hematopoietic development and disease. These data implicate miR-155 as a contributor to physiological GM expansion during inflammation and to certain pathological features associated with AML, emphasizing the importance of proper miR-155 regulation in developing myeloid cells during times of inflammatory stress. Experiment Overall Design: Construct stable RAW264.7 mouse macrophage cell lines expressing mir-155 or empty vector. RNA is extracted and global gene expression analysis performed to identify mir-155 regulated mRNAs.
2008-04-04 | E-GEOD-10467 | biostudies-arrayexpress
Project description:Analysis of genes induced in DC precursors and in BM cells and monocytes treated with GM-CSF For progenitor arrays, bone marrow progenitors (CMP, GMP, CDP, and pre-cDC) were harvested from WT C57Bl/6 mice. For culture arrays, BM was cultured in the presence of GM-CSF or M-CSF and adherent and non-adherent cells sorted. For monocyte cultures, sorted BM monocytes were treated with GM-CSF for 0, 24 or 48 hours.
2012-05-20 | E-GEOD-37029 | biostudies-arrayexpress