Gene expression profiling of human monocytes and monocyte-derived-macrophages
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ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE10220 | GEO | 2008/08/31
SECONDARY ACCESSION(S): PRJNA108281
REPOSITORIES: GEO
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Project description:In this study we analyzed the gene expression profiles of human monocytes and monocyte-dervied-macrophages. Keywords: Gene expression profiling Blood samples were obtained from 86 patients with symptoms of acute coronary syndrome who had undergone coronary angiography at the department of cardiology of the Pitié-Salpêtrière Hospital, Paris and who had on stenosis > 50 % diagnosed in at least one major coronary artery. 48 monocyte and 48 macrophage samples (38 pools of 2 samples and 10 individual samples for each type of RNA) were hybridized to the RNG/MRC platform.
2008-08-31 | E-GEOD-10220 | biostudies-arrayexpress
Project description:Macrophages play a key role in both innate and adaptive immunity, but our knowledge on the changes in transcription regulation that occurs during their differentiation from monocytes is still limited. In this study, we used a meta-analysis followed by a systems biology approach for the identification of differentially expressed genes between monocytes and macrophages and possible regulators of these changes in transcription. Based on the pattern of gene expression change, transcription regulator analysis predicted a decrease in Enhancer of Zeste homolog 2 (EZH2), a histone 3 lysine 27 methyl transferase, activity after differentiation of monocytes into macrophages. This inhibition was validated by a significant decrease in trimethylated H3K27 during differentiation of both human primary monocytes into macrophages and the THP-1 cell line into macrophage-like cells. Overexpressing EZH2 during differentiation of monocytes and THP-1 cells obstructs cellular adhesion, thus preventing the first step in differentiation. Another facet of macrophage differentiation is the cessation of proliferation, and inhibition of EZH2 by the small molecule inhibitor GSK126 in THP-1 cells indeed impedes proliferation. This study shows an important part for epigenetic changes during monocyte differentiation. It highlights the role of EZH2 activity behind the changes needed in adhesion and proliferation mechanisms for macrophage formation. Monocytes isolated from human peripherial mononuclear cells were differentiated in monocyte derived macrophages by M-CSF stimulation
2013-11-22 | E-GEOD-52647 | biostudies-arrayexpress
Project description:microRNA profiling data includes biological replicates of primary monocytes and macrophages from three human donors Dye swap hybridization arrays were performed for total RNA isolated from fresh monocytes and 7-day monocyte-derived macrophages from each of three human donors
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Project description:Comparison of the transcriptome of CD14+ human monocytes and CD14+ human monocyte-derived macrophages generated in the presence of M-CSF (M-MØ) or GM-CSF (GM-MØ).
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Project description:Gene profile of human CD14+ monocytes and monocyte-derived macrophages
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Project description:Macrophages play a key role in both innate and adaptive immunity, but our knowledge on the changes in transcription regulation that occurs during their differentiation from monocytes is still limited. In this study, we used a meta-analysis followed by a systems biology approach for the identification of differentially expressed genes between monocytes and macrophages and possible regulators of these changes in transcription. Based on the pattern of gene expression change, transcription regulator analysis predicted a decrease in Enhancer of Zeste homolog 2 (EZH2), a histone 3 lysine 27 methyl transferase, activity after differentiation of monocytes into macrophages. This inhibition was validated by a significant decrease in trimethylated H3K27 during differentiation of both human primary monocytes into macrophages and the THP-1 cell line into macrophage-like cells. Overexpressing EZH2 during differentiation of monocytes and THP-1 cells obstructs cellular adhesion, thus preventing the first step in differentiation. Another facet of macrophage differentiation is the cessation of proliferation, and inhibition of EZH2 by the small molecule inhibitor GSK126 in THP-1 cells indeed impedes proliferation. This study shows an important part for epigenetic changes during monocyte differentiation. It highlights the role of EZH2 activity behind the changes needed in adhesion and proliferation mechanisms for macrophage formation.
2013-11-22 | GSE52647 | GEO
Project description:Monocytes and monocyte-derived macrophages are myeloid cells that span all tissues and play pivotal roles in tissue homeostasis and tumor progression. Here, we show that these cells express high levels of leukocyte-associated immunoglobulin-like receptor 1 (LAIR1), a known receptor for Collagen. We hypothesized that LAIR1 mediates the interaction between myeloid cells and the collagen-rich extracellular matrix (ECM). First, using a high throughput cell-based platform for membrane protein interactome discovery, we identified Colec12, a protein expressed by non-hematopoietic stromal cells, as a novel high affinity LAIR1 ligand. Global phosphoproteomics was employed to determine the signaling pathways triggered upon LAIR1 engagement by Colec12 and Collagen in monocytes, which suggested a main role in cell survival and cell cycle regulation. Using a combination of genomic, phenotypic and transcriptomics assays, we corroborated the homeostatic role of LAIR1 signaling in mice. Under homeostatic conditions, LAIR1 preferentially restrained proliferation and promoted survival of non-classical monocytes and dysregulation of this pathway led to an increase in classical monocytes and tissue-infiltrating macrophages in lungs. In tumors, LAIR1 deficiency in myeloid cells exacerbated metastasis to lungs in mice. Finally, we confirmed LAIR1 and LAIR1-expressing myeloid cell signatures as positive prognostic factors in human metastatic melanoma. Collectively, our study shows that ECM provides monocytes and monocyte-derived macrophages with important homeostatic signals that are mediated via the immunoreceptor LAIR1. This work illuminates new aspects of ECM-myeloid cell interactions that may be pertinent in cancer, fibrotic diseases and therapeutic development.
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Project description:Microarray analysis was carried out on human monocytes (Mono) and monocyte-derived macrophages (MDM) (n = 4 donors) that were subjected to normoxic (N) or hypoxic (H) conditions. Purified human monocytes and their MDM were cultured for 24 h in CSF-1 (5000U/ml) under normoxic or hypoxic conditions.
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Project description:Excessive alcohol consumption adversely affects the immune system and triggers the activation of peripheral blood (PB) monocytes and tissue macrophages, contributing to alcohol- related organ damage. This study aimed to analyze the M1/M2 and inflammatory phenotypes of circulating monocytes and macrophage-derived monocytes (MDMs). This single-center cross- sectional study included 20 excessive alcohol drinkers (EADs) and 22 healthy controls. PB samples were collected under fasting conditions for isolation of CD14+ monocytes and short-term culture without stimulation, LPS/IFNγ, or IL4/IL13. These conditions were also used to polarize monocyte-derived macrophages (MDMs) into M0, M1, or M2 phenotypes. Cytokine production was assessed in the blood samples and supernatants. M1/M2 related markers in PB monocytes and MDMs were analyzed using mRNA expression and surface marker analyses. In addition, the miRNA profile was analyzed in CD14+ monocytes. PB samples from EADs exhibited increased levels of pro-inflammatory cytokines.
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Project description:Macrophages adopt an alternatively activated phenotype (AAM) when activated by IL-4. While these AAMs can be derived from local proliferation of resident tissue macrophages or recruited inflammatory monocytes, it is not known whether these different AAMs are phenotypically and functionally distinct. Using microarray analysis of gene expression, we demonstrated that while both monocyte- and tissue-derived AAM expressed high levels of Arg1, Chi3l3 and Retnla, only monocyte-derived AAM upregulated Raldh2 and PD-L2. The distinction between monocyte- and tissue-derived macrophages can, therefore, be made using different phenotypic markers. Gene expression profiling analysis with whole genome microarray of tissue-derived and monocyte-derived macrophages, induced using IL-4c and/or 4% thioglycollate.
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