NDT Advance Access originally published online on July 26, 2005
Nephrology Dialysis Transplantation 2005 20(11):2548-2551; doi:10.1093/ndt/gfi018
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Successful reintroduction of a different erythropoiesis-stimulating agent after pure red cell aplasia: relapse after successful therapy with prednisone
1 Department of Medicine and 2 Division of Nephrology, University of British Columbia, St Paul's Hospital and 3 Kidney Function Clinic, Vancouver BC, Canada
Correspondence and offprint requests to: A. Levin, MD FRCPC, University of British Columbia, Division of Nephrology, St Paul's Hospital, 1081 Burrard Street Rm 6010A, Vancouver BC, Canada V6Z 1Y8. Email: alevin{at}providencehealth.bc.ca
We report a 3-year case history that describes a 78-year-old woman with recurrent transfusion-dependent pure red cell aplasia (PRCA) secondary to recombinant epoetin use that was responsive to immunosuppressant therapy. The patient had kidney disease of unknown aetiology (estimated glomerular filtration rate of 13 ml/min/1.73 m2) and was not on dialysis. After 16 months of therapy with subcutaneous Eprex, she developed anti-erythropoietin antibody-confirmed PRCA and was started on high dose prednisone (50 mg per day). Within 5 months, the patient's serum was clear of antibodies and, under the cover of low dose prednisone (5–7.5 mg per day), therapy with a different erythropoiesis-stimulating compound (Aranesp) was initiated due to persistent fatigue and anaemia. At 3 months of therapy, the serum anti-erythropoietin antibodies remained negative and, due to the patient's requests, and after discussion, prednisone therapy was discontinued. Unfortunately, 3 months after cessation of prednisone, a recurrence of PRCA was confirmed by the development of profound anaemia and reappearance of anti-erythropoietin antibodies in the patient's serum. High dose prednisone (50 mg per day) was reinstituted, whereupon, 2 months later, antibodies were again confirmed to be negative. This case report demonstrates the responsiveness of PRCA to simple immunosuppressive therapy, and the ability to introduce different erythropoiesis-stimulating agents in the presence of such therapy. It appears that there may be problems associated with discontinuation of immunosuppressive therapy in the presence of sustained erythropoiesis-stimulating agent therapy in those in whom the condition has occurred previously.
Keywords: darbepoetin; erythropoietin; pure red cell aplasia; steroids
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