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  • Title: Isoantibodies in immunoglobulin for intravenous use may cause erythrocyte sequestration.
    Author: Shoham-Kessary H, Gershon H.
    Journal: Vox Sang; 1999; 77(1):33-9. PubMed ID: 10474088.
    Abstract:
    BACKGROUND AND OBJECTIVES: IVIg, while generally a safe therapy for a variety of immunological disorders, can have detrimental effects on erythrocyte (RBC) homeostasis. We studied the mediation of erythrophagocytosis by isoantibodies in IVIg. MATERIALS AND METHODS: RBC were exposed to IVIg and binding of IgG determined by flow cytometry. In vitro phagocytosis of these RBC was assayed. RESULTS: Anti-A and anti-B in IVIg mediate Fc-dependent erythrophagocytosis even in the presence of excess IVIg. Removal of these isoantibodies from IVIg prevents IgG binding and erythrophagocytosis. Complement enhances IVIg-mediated RBC sequestration. CONCLUSION: It may be desirable to remove isoantibodies from IVIg especially for anemic patients or those who respond to the IVIg with a hemolytic episode.
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