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RNA-sequencing of human monocytes with high and low expression of SLAMF7

ABSTRACT: This study evaluated transcriptomic differences in cells with high and low expression of SLAMF7 in monocyte populations from blood and synovial fluid.

ORGANISM(S): Homo sapiens

PROVIDER: GSE185508 | GEO | 2022/02/11

REPOSITORIES: GEO

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RNA-sequencing of macrophages after stimulation of SLAMF7

Project description:This study evaluated transcriptomic changes in monocyte-derived macrophages from healthy donors after stimulation with recombinant SLAMF7 or anti-SLAMF7 antibody, compared to macrophages without additional stimulation.

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DNA methylation patterns in monocytes associate and evolve with prognosis in undifferentiated arthritis [MACs]

Project description:Ontogenic origin of monocytic cells in the synovial fluid is currently under discussion. Also, the polarization of these cells have been described to a play a role in the pathogenic joints of arthritis patients. To answer these questions, we analyzed data from blood and SF monocytes and compared them with those of in vitro-generated monocyte-derived macrophages. All conditions were compared, and differences were characterized, considering experimental condition (MO, M-CSF or GM-CSF), compartment (blood or SF) and patient prognosis (good or poor).

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Profiling of CD14+ monocytes from paired rheumatoid arthritis (RA)-patient peripheral blood and synovial fluid samples

Project description:CD14+ monocytes sorted from the synovial fluid or peripheral blood of rheumatoid arthritis patients were analyzed by full transcriptome microarray analysis. Monocytes from healthy control samples (peripheral blood) were also profiled.

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Expression data of bone marrow and blood monocytes from patients with rheumatoid arthritis (RA) and osteoarthritis (OA)

Project description:Rheumatoid arthritis (RA) accompanies infiltration and activation of monocytes in inflamed joints. In this study we investigated dominant alterations of RA monocytes in bone marrow (BM), blood and inflamed joints. CD14+ cells from BM and blood of RA and osteoarthritis (OA) patients were profiled with Affymetrix HG U133 Plus 2.0 Arrays. Detailed functional analysis was performed with reference transcriptomes of BM precursors, monocyte blood subsets, monocyte activation and mobilization. Cytometric profiling determined monocyte subsets of CD14++CD16-, CD14++CD16+ and CD14+CD16+ cells in BM, blood and synovial fluid (SF) and ELISAs quantified the release of activation markers into SF and serum. Investigation of genes differentially expressed between RA and OA monocytes by co-expression analysis with reference transcriptomes revealed gene patterns of early myeloid precursors in RA-BM and late myeloid precursors along with reduced terminal differentiation to CD14+CD16+ monocytes in RA blood. Patterns associated with TNF/LPS stimulation were weak and more pronounced in RA blood than BM. Cytometric phenotyping of cells in BM and blood disclosed differences related to monocyte subsets and confirmed the reduced frequency of terminally differentiated CD14+CD16+ monocytes in RA blood, as suggested by transcriptome data. Monocyte activation in SF was characterized by the predominance of CD14++CD16++CD163+HLA-DR+ cells and elevated concentrations of sCD14, sCD163 and S100P. Accelerated monocytopoiesis, BM egress and migration into inflamed joints characterise increased monocyte turnover in RA. Predominant activation in the joint suggests local and primary stimulants, which may promote also adaptive immune triggering through monocytes, thus indicating their importance for diagnostic and therapeutic strategies.

2017-07-05 | GSE100786 | GEO

Context-specific regulation of monocyte surface IL7R expression and soluble receptor secretion by a common autoimmune risk allele

Project description:IL-7 is a key factor in T-cell immunity and IL7R polymorphisms are implicated in autoimmune pathogenesis. IL7R mRNA is induced in stimulated monocytes in a genetically determined manner. Here we show monocyte surface and soluble IL7R (sIL7R) protein are markedly expressed in response to lipopolysaccharide (LPS). Flow cytometry of synovial fluid-derived monocytes from patients with spondyloarthritis showed an enlarged subset of IL7R+ monocytes. Single-cell RNA sequencing of ex-vivo derived monocytes from the synovial fluid and blood of patients revealed that IL7R+ monocytes at the inflammatory site have a unique transcriptional profile that markedly overlaps that induced by IL-7 in-vitro and shows similarity to the previously described ‘Mono4’ subset. These data demonstrate disease-associated genetic variants at IL7R specifically impact monocyte surface IL7R and sIL7R following innate immune stimulation, suggesting a previously unappreciated key role for monocytes in IL-7 pathway biology and IL7R-associated diseases.

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Conventional DC1 (cDC1) are Strongly Enriched, Quiescent and Relatively Tolerogenic in Local Inflammatory Arthritis

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Effect of T cell supernatants or cytokines on synovial fibroblasts

Project description:To investigate the effects of soluble factors produced by synovial CD8 T cells, we stimulated human rheumatoid arthritis (RA) synovial fibroblasts with supernatants from synovial fluid CD8 T cells, blood CD8 T cells, or synovial fluid CD4 T cells stimulated with anti-CD3/CD28 antibody-coated beads. For comparison, we stimulated RA synovial fibroblasts with recombinant TNF or interferon-gamma or T cell supernatants pre-incubated with TNF-blocking antibodies.

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10x single cell gene expression and V(D)J immune profiling of T cells from the blood, synovial fluid and synovial tissue in psoriatic arthritis patients

Project description:This study shows the pronounced expansion of CD8 T cell clones at sites of active inflammation within the joints of psoriatic arthritis (PsA) patients compared to blood, and characterises the gene expression of expanded clones using droplet based single cell RNA sequencing. Mononuclear cells were separated from freshly acquired paired peripheral blood and synovial fluid samples from 3 PsA patients using density gradient separation, then enriched for CD4 and CD8 T cells using FACS. Additionally, CD45+ leukocytes were enriched by FACS from the cryopreserved synovial tissue of 2 further PsA patients. All cells were then processed using a 10x Chromium Controller and sequenced by Illumina HiSeq 4000 (peripheral blood / synovial fluid) or NovaSeq with S2 flowcell (synovial tissue).

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