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Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Ann+Hematol 1991 ; 62 (2-3): 76-80 Nephropedia Template TP
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Spontaneous interferon-alpha antibodies in a patient with pure red cell aplasia and recurrent cutaneous carcinomas #MMPMID1903312
Prummer O; Frickhofen N; Digel W; Heimpel H; Porzsolt F
Ann Hematol 1991[Feb]; 62 (2-3): 76-80 PMID1903312show ga
High-titered spontaneous interferon (IFN) antibodies were detected in a patient with pure red cell aplasia (PRCA), a benign mediastinal tumor, and recurrent cutaneous carcinomas. The circulating IFN antibodies reacted broadly with various human IFN-alpha subtypes (20-140 x 10(3) neutralizing units/ml serum) but not with IFN-beta or IFN-gamma, and they neutralized the antiviral activity of the patient's endogenous IFN-alpha. The IFN-alpha-binding activity was restricted to the IgG1 subclass in a nonmonoclonal manner. Whereas the PRCA repeatedly responded to immunosuppression with high-dose cyclosporin A (CSA) and CSA plus plasmapheresis, IFN antibody production continued during treatment with cyclophosphamide and CSA. Serological analysis revealed past infection with parvovirus B19 and persistent B19 IgM titers. Antibody-mediated impairment of the IFN-alpha system might have favored the development of both PRCA and the various cutaneous carcinomas in this patient.