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Transcriptome modulation analysis of cytomegalovirus-infected immature monocyte-derived dendritic cells

ABSTRACT: Analysis of dendritic cells (DCs) at 6h and 48h after infection with cytomegalovirus (CMV) versus non infected. CMV tends to induce immunosuppression followed by lasting immunity. DCs appear to play a role in this effect. Results provide insights into CMV/DC interactions and suggest mechanisms for CMV-regulated early immune response. Keywords: gene expression array-based, count

ORGANISM(S): Homo sapiens

PROVIDER: GSE14490 | GEO | 2009/01/22

SECONDARY ACCESSION(S): PRJNA111545

REPOSITORIES: GEO

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Transcriptome modulation analysis of cytomegalovirus-infected immature monocyte-derived dendritic cells

Project description:Analysis of dendritic cells (DCs) at 6h and 48h after infection with cytomegalovirus (CMV) versus non infected. CMV tends to induce immunosuppression followed by lasting immunity. DCs appear to play a role in this effect. Results provide insights into CMV/DC interactions and suggest mechanisms for CMV-regulated early immune response. Keywords: gene expression array-based, count In the present study, immature monocyte-derived dendritic cells were generated from CMV neg healthy blood donors and infected or not with an endotheliotropic CMV strain. Gene expression modulation by the CMV infection was studied in a time course assay (non-infected - NI - vs 6h or 48h post-infection. Patient C has no 48h sample

2009-01-22 | E-GEOD-14490 | biostudies-arrayexpress

Dual-Sequencing of dendritic cells infected with cytomegalovirus

Project description:Dendritic cells were infected with human cytomegalovirus (CMV) for 4, 8 or 12 hours. Single-cultures of dendritic cells serve as controls. RNA was isolated and processed for next generation sequencing.

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Transcription profiling of human fetal gammadelta T cells from that cytomegalovirus (CMV) positive or negative

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Transcriptomics of Kidney Transplant Recipients after Cytomegalovirus DNAemia

Project description:To study the gene expression dynamics in cytomegalovirus (CMV) DNAemic patients after kidney transplantation, we performed RNA sequencing (RNAseq) on 31 DNAemic patients at 4 timepoints (baseline, 1 week post-DNAemia, 1 month post-DNAemia, and a long-term timepoint 9-18 months post-DNAemia) matched with 31 non-DNAemic patients at 2 timepoints (baseline and long-term).

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Human plasmacytoid dendritic cells mount a distinct antiviral response to virus-infected cells

Project description:Plasmacytoid dendritic cells (pDCs) can rapidly produce interferons and other soluble factors in response to extracellular viruses or virus mimics such as CpG-containing DNA. pDCs can also recognize live cells infected with certain RNA viruses, but the relevance and functional consequences of such recognition remain unclear. We studied the response of primary DCs to the prototypical persistent DNA virus, the human cytomegalovirus (CMV). Human pDCs responded poorly to free CMV but strongly to live CMV-infected fibroblasts, in a process that involved integrin-mediated adhesion, transfer of viral DNA to pDCs and its recognition through TLR9. Compared to transient polyfunctional responses to CpG or free influenza virus, pDC response to CMV-infected cells was long-lasting, dominated by the production of type I (IFN-I) and type III (IFN-III) interferons, and lacked diversification into functionally distinct populations. Similarly, pDC activation by influenza-infected lung epithelial cells was highly efficient, prolonged and dominated by interferon production. Prolonged pDC activation by CMV-infected cells facilitated the activation of natural killer cells that are critical for CMV control. Finally, patients with CMV viremia harbored phenotypically activated pDCs and increased levels of IFN-I and IFN-III in circulation. Thus, recognition of live infected cells is a common mechanism of virus detection by pDCs that elicits a unique antiviral response program.

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Engineered receptors for human cytomegalovirus that are orthogonal to normal human biology

Project description:A trimeric glycoprotein complex on the surface of human cytomegalovirus (CMV) binds to platelet-derived growth factor (PDGF) receptor α (PDGFRα) to mediate host cell recognition and fusion of the viral and cellular membranes. Soluble PDGFRα potently neutralizes CMV in tissue culture, and its potential use as an antiviral therapeutic has the benefit that any escape mutants will likely be attenuated. However, PDGFRα binds multiple PDGF ligands in the human body as part of developmental programs in embryogenesis and continuing through adulthood. Any therapies with soluble receptor therefore come with serious efficacy and safety concerns, especially for the treatment of congenital CMV. Soluble virus receptors that are orthogonal to human biology would reduce safety and efficacy concerns. This engineering problem is solved by deep mutational scanning on the D2-D3 domains of PDGFRα to identify variants that maintain interactions with the CMV glycoprotein trimer in the presence of competing PDGF ligands.

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CMV infection induces a rapid and sustained change in the expression of Natural Killer Cell Receptors on CD8+ T Cells

Project description:The CD8+ T cell compartment of human cytomegalovirus (CMV) seropositive individuals characteristically contains a high proportion of cells that expresses Natural Killer Cell Receptors (NKR) which may contribute to the surveillance of virus-infected cells. To test if this enhanced expression is a direct and immediate result of CMV infection we used DNA microarrays to analyse putative changes in RNA-expression level of 39 NKRs in CMV-specific CD8+ T cells of renal transplant recipients experiencing primary CMV infection. Already in the acute phase of infection 29 NKRs were induced of which 19 remained high 1 year after cessation of viral replication. Activating and inhibitory NKRs were induced to a similar extent. Detailed longitudinal flowcytometric analyses confirmed NKR changes at the protein level. Strikingly, a strong induction of CD94 on CD3+ T cells was observed with surface expression of activating CD94dimNKG2C dimers appearing before inhibitory CD94brightNKG2A ones. After the acute phase of infection, the balance between inhibitory and activating receptors did not change. Thus, CMV infection induces a rapid and lasting change in the expression of NK receptors on human CD8+ T cells. Keywords: primary cytomegalovirus infection, human, CD8+ T cells, NKR, latent infection, chronic infection CMV-specific CD8+ T cells were isolated at three different stages (peak, 1 year p.i, latent) from three CMV seropositive individuals. Total RNA for each stage was pooled and compared with pooled RNA of naive CD8+ T-cells from healthy controls. For quality control naive CD8+ T-cells were compared with naive CD8+ T-cells. The experiment was performed in dye-swap.

2008-08-28 | E-GEOD-12589 | biostudies-arrayexpress

CMV infection induces a rapid and sustained change in the expression of Natural Killer Cell Receptors on CD8+ T Cells

2008-08-28 | GSE12589 | GEO

PERFORMANCE OF STOOL AND SERUM CYTOMEGALOVIRUS REAL-TIME POLYMERASE CHAIN REACTION AND THEIR COMBINATION IN DIAGNOSING CMV COLITIS

Project description:Interventions: Patients with the detection of either cytomegalic cells or IHC-CMV cells were diagnosed with CMV colitis.,Patients older than 18 years with clinical suspicion of CMV colitis but negative biopsy for CMV.,Asymptomatic patients underwent colonoscopy for screening.;Diagnostic,Diagnostic,Diagnostic;CMV colitis,Non-CMV colitis ,Healthy volunteers Primary outcome(s): Diagnostic performance After colonoscopy Sensitivity, Specificity

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Immune Response of Immature Dendritic Cells after Infection with Human Cytomegalovirus Strain TB40E

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