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  • Title: Plasma levels of soluble CD30 in kidney graft recipients as predictors of acute allograft rejection.
    Author: Ayed K, Abdallah TB, Bardi R, Abderrahim E, Kheder A.
    Journal: Transplant Proc; 2006 Sep; 38(7):2300-2. PubMed ID: 16980071.
    Abstract:
    In renal transplant recipients elevated soluble serum CD30 levels are associated with increased rejection and graft loss. We sought to determine the sCD30 plasma levels before and after kidney transplantation and to assess whether sCD30 was a predictive factor of immunological risk. sCD30 plasma levels were determined by an enzyme-linked immunosorbent assay assay in 52 kidney graft recipients before as well as 7, 15, and 21 days after transplantation. Eighteen patients developed acute allograft rejection (group I) and 34 patients showed uneventful courses (group II). Before transplantation sCD30 plasma levels were elevated in both groups (mean: 162.6 +/- 89.5 U/mL). After transplantation, group I recipients with acute rejection showed higher relative levels of plasma sCD30 on days 7 and 15 (120.8 +/- 74.6 U/mL and 210.6 +/- 108.7 U/mL respectively) compared with group II patients without rejection (95 +/- 45 U/mL and 59.4 +/- 31.6 U/mL), a difference that was significant for group I (P = .0003) and not significant for group II (P = .09). On day 21, sCD30 decreased in the two groups but remained higher among group I patients (120.6 +/- 92.7 U/mL). HLA antibodies were positive in 18 patients (34.6%) with 9 (50%) experiencing at last one episode of acute rejection. Among 34 patients negative for anti-HLA antibodies, nine displayed acute rejection only (26.4%), a difference that was not significant (P > .05). If we consider 100 U/mL as the minimum predictive level for allograft rejection, our results suggested that levels of sCD30 should be taken into consideration with the presence of HLA-antibodies detectable before and after transplantation, especially in patients with more than three HLA mismatches [RR = 3.20 (0.94 < RR < 10.91)]. These data suggested that measurement of plasma sCD30 is a useful procedure for the recognition of rejection in its earliest stages.
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