Phagocytosis of IgA Immune Complexes by Human U937 Cells-中国期刊网

摘要 InordertostudyFcαRⅠmediatedphagocytosisotlgAimmunecomplexesbyU937cells,antigen8.9NIP/BSAwaslabeledwithFITCandreactedwithanti-NIPIgAoranti-NIPIgGantibodytoformimmunecomplexes(ICs).Theywerethenincubatedwithphorbol12-myristateB-acetate(PMA)stimulatedU937cells.ThephagocytosedICswerequantifiedbyflowcytometry.TheresultswasthattheexpressionofFcαRⅠonU937cellswashigherthanthatofFcγRⅠ,FcyRⅡandFcγRⅢ.AfterstimulationbyPMA,expressionofFcαRⅠonU937cellswasmarkedlyupregulatedandthephagocytosisofIgAICswasenhanced.FcαRⅠmediatedspecificIgAphagocytosiswasstrongerthanFcγRⅠandFcγRⅡmediatedIgGphagocytosis.Complementreceptors,CR1andCR3,enhancedU937cellphagocytosisofIgAICs.ItconcludesthatFcγRⅠmediatedstrongphagocytosisofIgAICs.

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Phagocytosis of IgA Immune Complexes by Human U937 Cells

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Phagocytosis of IgA Immune Complexes by Human U937 Cells

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