Biomaterial Database

Antibody-dependent induction of type I interferons by poliovirus in human mononuclear blood cells requires the type II fcgamma receptor (CD32). 2000

P Palmer, and B Charley, and B Rombaut, and M Daëron, and P Lebon

Laboratoire de Virologie, Hôpital Saint-Vincent-de-Paul, Université Paris V, 82 avenue Denfert-Rochereau, Paris Cedex 14, 75674, France.

The induction of type I interferons (IFNs) in peripheral blood mononuclear cells (PBMCs) can be triggered by viral infection or exposure to viral glycoproteins. Here we show that the IFN-alpha-inducing capacity of attenuated poliovirus vaccine strains is dramatically enhanced in the presence of human polyvalent immunoglobulin G (IgG). The transcription of both IFN-alpha and IFN-beta genes was detected by RT-PCR in stimulated cells. This antibody-dependent activation of type I IFNs genes was also observed with Formalin-inactivated or UV-inactivated poliovirus, but not with empty poliovirus capsids. The ability of poliovirus-antibody complexes to induce IFN-alpha was specifically inhibited when PBMCs were preincubated with an excess of the Fc fragment of IgG. Monoclonal antibodies directed to FcgammaRII (CD32) were also inhibitory, whereas antibodies to the two other classes of Fcgamma receptors, CD16 and CD64, were not. Also, aggregation of FcgammaRII by anti-CD32 antibodies alone failed to induce IFN-alpha production. Our results suggest that induction of type I interferons by poliovirus-antibody complexes depends on CD32-mediated phagocytosis of RNA-containing viral particles. As suggested by the results of an ELISPOT analysis, only a fraction of the IFN-alpha-producing cells are able to synthesize IFN-alpha in response to poliovirus-IgG complexes.

UI	MeSH Term	Description	Entries
D007074	Immunoglobulin G	The major immunoglobulin isotype class in normal human serum. There are several isotype subclasses of IgG, for example, IgG1, IgG2A, and IgG2B.	Gamma Globulin, 7S,IgG,IgG Antibody,Allerglobuline,IgG(T),IgG1,IgG2,IgG2A,IgG2B,IgG3,IgG4,Immunoglobulin GT,Polyglobin,7S Gamma Globulin,Antibody, IgG,GT, Immunoglobulin
D007370	Interferon Type I	Interferon secreted by leukocytes, fibroblasts, or lymphoblasts in response to viruses or interferon inducers other than mitogens, antigens, or allo-antigens. They include alpha- and beta-interferons (INTERFERON-ALPHA and INTERFERON-BETA).	Interferons Type I,Type I Interferon,Type I Interferons,Interferon, Type I,Interferons, Type I
D007963	Leukocytes, Mononuclear	Mature LYMPHOCYTES and MONOCYTES transported by the blood to the body's extravascular space. They are morphologically distinguishable from mature granulocytic leukocytes by their large, non-lobed nuclei and lack of coarse, heavily stained cytoplasmic granules.	Mononuclear Leukocyte,Mononuclear Leukocytes,PBMC Peripheral Blood Mononuclear Cells,Peripheral Blood Human Mononuclear Cells,Peripheral Blood Mononuclear Cell,Peripheral Blood Mononuclear Cells,Leukocyte, Mononuclear
D011055	Poliovirus Vaccine, Oral	A live vaccine containing attenuated poliovirus, types I, II, and III, grown in monkey kidney cell tissue culture, used for routine immunization of children against polio. This vaccine induces long-lasting intestinal and humoral immunity. Killed vaccine induces only humoral immunity. Oral poliovirus vaccine should not be administered to immunocompromised individuals or their household contacts. (Dorland, 28th ed)	Sabin Vaccine,Oral Poliovirus Vaccine,Vaccine, Oral Poliovirus,Vaccine, Sabin
D002213	Capsid	The outer protein protective shell of a virus, which protects the viral nucleic acid. Capsids are composed of repeating units (capsomers or capsomeres) of CAPSID PROTEINS which when assembled together form either an icosahedral or helical shape.	Procapsid,Prohead,Capsids,Procapsids,Proheads
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000914	Antibodies, Viral	Immunoglobulins produced in response to VIRAL ANTIGENS.	Viral Antibodies
D012333	RNA, Messenger	RNA sequences that serve as templates for protein synthesis. Bacterial mRNAs are generally primary transcripts in that they do not require post-transcriptional processing. Eukaryotic mRNA is synthesized in the nucleus and must be exported to the cytoplasm for translation. Most eukaryotic mRNAs have a sequence of polyadenylic acid at the 3' end, referred to as the poly(A) tail. The function of this tail is not known for certain, but it may play a role in the export of mature mRNA from the nucleus as well as in helping stabilize some mRNA molecules by retarding their degradation in the cytoplasm.	Messenger RNA,Messenger RNA, Polyadenylated,Poly(A) Tail,Poly(A)+ RNA,Poly(A)+ mRNA,RNA, Messenger, Polyadenylated,RNA, Polyadenylated,mRNA,mRNA, Non-Polyadenylated,mRNA, Polyadenylated,Non-Polyadenylated mRNA,Poly(A) RNA,Polyadenylated mRNA,Non Polyadenylated mRNA,Polyadenylated Messenger RNA,Polyadenylated RNA,RNA, Polyadenylated Messenger,mRNA, Non Polyadenylated
D012367	RNA, Viral	Ribonucleic acid that makes up the genetic material of viruses.	Viral RNA
D016898	Interferon-alpha	One of the type I interferons produced by peripheral blood leukocytes or lymphoblastoid cells. In addition to antiviral activity, it activates NATURAL KILLER CELLS and B-LYMPHOCYTES, and down-regulates VASCULAR ENDOTHELIAL GROWTH FACTOR expression through PI-3 KINASE and MAPK KINASES signaling pathways.	Interferon Alfa,Interferon, Leukocyte,Interferon, Lymphoblast,alpha-Interferon,IFN-alpha D,IFN-alpha5,Interferon alpha-1,Interferon alpha-17,Interferon alpha-4,Interferon alpha-5,Interferon alpha-7,Interferon alpha-88,Interferon alpha-J,Interferon alpha-T,Interferon alpha4,Interferon alpha5,Interferon, Lymphoblastoid,Interferon, alpha,LeIF I,LeIF J,Leif D,IFN alpha D,IFN alpha5,Interferon alpha,Interferon alpha 1,Interferon alpha 17,Interferon alpha 4,Interferon alpha 5,Interferon alpha 7,Interferon alpha 88,Interferon alpha J,Interferon alpha T,Leukocyte Interferon,Lymphoblast Interferon,Lymphoblastoid Interferon,alpha Interferon