Project description:Murine bone marrow derived macrophages were treated with Immne complex for 4 hours after which transcriptional changes were assessed by microarray.
Project description:Conditioned medium (CM) from bone marrow derived macrophages untreated or treated with LPS was collected and filtered through a 0.22-μm filter. The filtered CM was sequentially fractionated with 50-kDa and 100-kDa Amicon filters. The 50–100 kDa fraction of CM was analyzed by mass spectrometry.
Project description:We investigated the molecular mechanisms by which GABA regulates host defense in macrophages. To examine this, we performed global gene expression analysis of bone marrow-derived macrophages (BMDMs) after GABA treatment.
Project description:To identify factors that could explain why mice transplanted with Vim deficient bone marrow display decreased atherosclerosis despite increased inflammation, we performed global gene expression profiling of bone-marrow derived macrophages from vimentin-deficient or wild-type littermates on C57BL/6 background. We elucidated the role of vimentin in atherogenic low-density receptorâ deficient mice after bone marrow transplantation from vimentin-deficient mice.
Project description:Comparative genomic analysis of basal and LPS-induced expression patterns of bone marrow derived macrophages and bone marrow resident macrophages demonstrates completely divergent transcriptome profile and indicates/confirms the existance of two distinct monocyte/macrophage populations in murine bone marrow. Most resident tissue macrophages descent from embryonic precursors of the yolk sac but inflammatory and bone marrow (BM) macrophages are considered to develop from hematopoietic stem cells (HSCs) in the BM. We now identified a novel subpopulation of resident CD163+ macrophages in the BM which were phenotypically and functionally distinct from classical BM-derived macrophages. Bioinformatics analysis of transcriptoms indicated a unique immune-modulatory phenotype of CD163+ macrophages. Cell fate studies in Csf1rMer-iCre-Mer;RosaLSL-GFP mice demonstrated that resident CD163+ macrophages of the BM do not develop from HSCs but descent from embryonic progenitors in the yolk sac strictly dependent on transcription factor IRF8. In contrast to other yolk sac derived tissue macrophages CD163+ cells seem to play a relevant role in infections and sterile inflammation. IRF8-/- mice lacking this population are highly sensible to S. aureus infections. Thus, CD163 defines a macrophage population resident in the bone marrow but originating from yolk sac progenitors which exhibits immune-modulatory properties under different inflammatory conditions. We used quantitative RNA-seq to perform whole transcriptome analysis and compare the transcriptomes of resident CD163+ BM macrophages and classical CD163- BMDM in steady state and after LPS stimulation.
Project description:Macrophages are important immune cells operating at the forefront of innate immunity by taking up foreign particles and microbes through phagocytosis. The RAW 264.7 cell line is commonly used for experiments in the macrophage and phagocytosis field. However, little is known how its functions compare to primary macrophages. Here, we have performed an in-depth proteomics characterisation of phagosomes from RAW 264.7 and bone marrow-derived macrophages by quantifying more than 2500 phagosomal proteins. Our data indicates that there are significant differences for a large number of proteins including important receptors such as mannose receptor 1 and Siglec-1.
Project description:To identify factors that could explain why mice transplanted with Vim deficient bone marrow display decreased atherosclerosis despite increased inflammation, we performed global gene expression profiling of bone-marrow derived macrophages from vimentin-deficient or wild-type littermates on C57BL/6 background.