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  • Title: Flow cytometry-detected IgG is not a contraindication to renal transplantation: IgM may be beneficial to outcome.
    Author: Kerman RH, Susskind B, Buyse I, Pryzbylowski P, Ruth J, Warnell S, Gruber SA, Katz S, Van Buren CT, Kahan BD.
    Journal: Transplantation; 1999 Dec 27; 68(12):1855-8. PubMed ID: 10628764.
    Abstract:
    BACKGROUND: At our transplant center, primary recipients of either a haplo-identical (haplo-ID) living related (LRD) or a cadaveric (CAD) donor renal allograft are transplanted after a negative donor-specific IgG anti-human globulin (AHG) cross-match (XM). Testing included the historically highest panel-reactive antibody and the immediate (0-7 days) pretransplant sera. A positive donor specific IgM-AHG XM has not been a contraindication to transplant. Reports suggest that donor-specific flow cytometry cross-matches (FCXM) may be more clinically informative than the AHG-XM. METHODS: We therefore evaluated the impact of a positive FCXM (IgG or IgM) on the rejection frequency (0-12 months after transplant) and 1-year graft survival for cyclosporine-prednisone-treated primary (haplo-ID and CAD) renal allograft recipients. All transplants were performed after a negative donor-specific IgG AHG-XM regardless of the IgM-AHG XM status. RESULTS: Rejection frequencies (26% vs. 31%, P = NS) and 1-year graft survivals (92% vs. 89%, P = NS) were comparable for haplo-ID LRD FCXM-negative and IgG-FCXM-positive recipients. However, IgM-FCXM-positive LRD recipients experienced significantly fewer rejections (13% vs. 26% P<0.02) and an improved 1-year graft survival (100% vs. 92%, P<0.02) than FCXM-negative LRD recipients. Similar results were observed for primary CAD recipients. Rejection frequencies (40% vs. 44%, P = NS) and 1-year graft survivals (83% vs. 81%, P = NS) were comparable for primary CAD FCXM-negative and IgG-FCXM-positive recipients. Again, IgM-FCXM-positive primary CAD recipients experienced significantly fewer rejections (22% vs. 40%, P<0.02) and improved 1-year graft survivals (89% vs. 83%, P<0.05) than FCXM-negative recipients. CONCLUSION: These data suggest that, after a negative donor-specific IgG-AHG XM, an IgG-positive FCXM is not a contraindication to transplantation. The presence of IgM may be beneficial in reducing the occurrence of rejection episodes and improving graft survivals.
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