Generation and Characterization of two Monoclonal Self‐Associating IgG Rheumatoid Factors from a Rheumatoid Synovium

Abstract
Objective. To study IgG rheumatoid factor (RF) from rheumatoid synovium.Methods. We fused the K6H6/B5 human—mouse heterohybridoma with unstimulated rheumatoid synovial B cells to generate IgG‐RF—secreting hybridomas.Results. The RFs from 2 such hybridomas bound specifically to the Fc fragment of human IgG and self‐associated to form immune complexes. Such immune complexes are a major characteristic of the pathogenic IgG‐RFs in rheumatoid synovium.Conclusion. IgG‐RF—secreting hybridomas have been obtained. Analyses may reveal the underlying mechanisms of the induction of IgG‐RF.

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