Allergic Skin and Systemic Reactions in a Patient with Pure Red Cell Aplasia and Anti-Erythropoietin Antibodies Challenged with Different Epoetins

Authors:
  • JGJohann Gross
    Johann Gross
  • AKArno Kromminga
    Arno Kromminga
  • HLHans-H. Loew
    Hans-H. Loew
  • KEKai-Uwe Eckardt
    Kai-Uwe Eckardt
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Abstract
Recent concern has arisen about the development of neutralizing anti-erythropoietin (EPO) antibodies during the course of treatment with recombinant EPO. The underlying mechanisms are poorly understood. A patient was observed who developed wheals at the sites of subcutaneous injections of epoetin-α before the manifestation of pure red cell aplasia (PRCA). Intravenous application of different epoetins evoked skin reactions at the sites of former subcutaneous injections, indicating local persistence of sensitized cells, and eventually a systemic anaphylactoid response. Anti-EPO antibodies crossreactive with epoetin-β and darbepoetin-α were demonstrated in patient serum. PRCA gradually improved after treatment with prednisolone.