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  • Title: Clearance of C4d deposition after successful treatment of acute humoral rejection in follow-up biopsies: a report of three cases.
    Author: Koller H, Steurer W, Mark W, Margreiter R, Lhotta K, Mayer G, Rosenkranz AR.
    Journal: Transpl Int; 2004 May; 17(4):177-81. PubMed ID: 15114439.
    Abstract:
    Acute humoral rejection (AHR) is currently perceived as an immunological reaction against donor antigens mediated by complement-binding antibodies. C4d, a split product of complement activation and bound to endothelial cells of the peritubular capillaries, is used as a diagnostic marker for AHR. We report on three patients with biopsy-proven acute humoral rejection who were treated initially with plasmapheresis (PS). As two of the patients did not recover renal function, and biopsy showed persistent C4d staining after PS, immunoadsorption (IAS) was additionally performed on them. In all patients, renal function recovered, and follow-up biopsies in two patients showed complete disappearance of C4d, 29 days and 58 days after transplantation and only minimal residual C4d deposits in one patient 48 days after transplantation. We conclude that successful treatment of AHR is followed by complete resolution of serological and histological markers of AHR, displayed by the disappearance of C4d.
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