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           Search results for: CMV antibody, Monoclonal Antibodies, Host Mouse, Isotype IgG1   

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#8940203   1997/01/08 Save this To Up

Human cytomegalovirus induces an Fc gamma receptor (Fc gammaR) in endothelial cells and fibroblasts that is distinct from the human cellular Fc gammaRs.

The expression of a trypsin-sensitive receptor for the Fc portion of IgG (Fc gammaR) was demonstrated by flow cytometry on the surface of human umbilical vein endothelial cells and fibroblasts infected with human cytomegalovirus (CMV). Double-labeling experiments showed strong expression of the CMV Fc gammaR in a perinuclear region of infected cells but not in bystander uninfected cells. The CMV Fc gammaR did not react with a panel of murine monoclonal antibodies directed against the known human IgG Fc receptors, Fc gammaRI, Fc gammaRII, and Fc gammaRIII. The cytoplasmic form but not the cell surface form of CMV Fc gammaR bound murine IgG3 moderately and murine IgG1 more weakly, while both forms bound rabbit IgG almost as strongly as human IgG. The function of CMV Fc gammaR is unclear, but it may allow CMV to evade host antibody responses. However, the binding of immune complexes to infected endothelium might also contribute to immunopathology.

1043 related Products with: Human cytomegalovirus induces an Fc gamma receptor (Fc gammaR) in endothelial cells and fibroblasts that is distinct from the human cellular Fc gammaRs.

Mouse anti Human IgG anti Mouse Anti-Human IgG-Fc Mouse Anti-Human IgG-Fc Sheep Anti-Human IgG (Fc) interleukin 17 receptor C Mouse Anti-Human Fc epsil Mouse Anti-Human Fc epsil Mouse Anti-Human IgD (Fc) Mouse Anti-Human IgG (Fc) Mouse Anti-Human IgG1 (Fc Goat Anti-Human CD32 FCGR Goat Anti Human IgA (FC),

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#8610387   1996/05/24 Save this To Up

CD13-specific autoimmunity in cytomegalovirus-infected immunocompromised patients.

Cytomegalovirus (CMV) infection has been suggested to be associated with various autoimmune manifestations, such as hemolytic anemia, granulocytopenia, and the formation of autoantibodies. Earlier we found that CMV is associated with a human protein, CD13 (aminopeptidase N), emanating from CMV-infected cells and serving an important function during CMV infection of susceptible cells. We hypothesized that CD13 might become immunogenic if presented to the immune system as a part of the CMV virion. The presence of CD13-specific antibodies was tested using a microcytotoxicity assay against CD13-positive human monocytes, or by flow cytometric assays against mouse cells transfected with human CD13; specificity was assessed by specific blocking with monoclonal antibodies. CD13 reactivity was also demonstrated in immunoprecipitation experiments. CD13-specific antibodies were identified in 15 of 33 bone marrow transplant patients, but exclusively in patients who had experienced either CMV disease (9/10) or CMV viremia (6/9), and appeared at the time of CMV detection. None of the remaining 14 patients without signs of CMV infection were positive for CD13 antibodies (P<0.0001). No antibody of this specificity was found in any of the control individuals (0/24), including patients with various autoimmune diseases, CMV-seropositive or -seronegative healthy individuals, and patients with acute EBV or HSV-1 infections. Thus, the CMV-associated autoantigen CD13 is immunogenic during CMV infection in bone marrow transplant patients. A specific response against autoantigens associated with infectious virus particles is suggested as a new and general mechanism to explain virus-induced autoimmune manifestations in man.

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anti HSV (II) gB IgG1 (mo anti HCMV IE pp65 IgG1 (m anti HCMV gB IgG1 (monocl CAL-101 Mechanisms: PI3K- BYL-719 Mechanisms: PI3K- GSK-2636771 Mechanisms: P IPI-145 (INK-1197) Mechan Apoptosis antibody array Cell cycle antibody array Cytokine antibody array i Signal transduction antib AKT Phospho-Specific Arra

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#2169440   1990/10/19 Save this To Up

Characterization of human anti-cytomegalovirus monoclonal antibody as biologics.

Human anti-cytomegalovirus (CMV) monoclonal antibody designated C23 was purified from the culture fluid of hybridoma cells which were generated by cell fusion of human lymphocytes and mouse myeloma cells. The purified C23 was found to be identical to human gammaglobulin (HGG) in sodium dodecyl sulfate-polyacrylamide gel electrophoresis under both reducing and non-reducing conditions and in gel filtration chromatography. C23 was not contaminated with either aggregated IgG molecules or mouse immunoglobulin chains. In addition, the formulated C23 preparation showed an anti-complement activity low enough to permit its use as a biologic. A virus neutralization titer of C23 was about 1,000 times higher than the titers of HGG preparations. All the tested CMV strains were susceptible to neutralization by C23 and this neutralization was not affected by addition of either beta 2 microglobulin or fresh human serum. These results suggest that human monoclonal antibody C23 is as safe as conventional HGG preparations which have been used in humans, and much more effective in providing host protection against CMV infection.

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anti CD16 monoclonal anti Anti C Reactive Protein A Anti AGO2 Human, Monoclon Anti AGO2 Human, Monoclon Anti AGO2 Human, Monoclon Anti AGO2 Human, Monoclon Anti AGO2 Human, Monoclon Anti AGO2 Human, Monoclon Anti Human AGO3, Monoclon anti CD20 monoclonal anti anti CD54 IgG2b k monoclo anti CD66e IgG1 monoclona

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