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  • Title: [Variability in Epstein-Barr virus serological markers in adult kidney transplant recipients].
    Author: Lauzurica R, Frías C, Bayés B, Ausina V, Romero R.
    Journal: Nefrologia; 2005; 25(2):185-90. PubMed ID: 15912656.
    Abstract:
    Epstein-Barr virus (EBV) infection is associated with the development of post-transplant lymphoproliferative disorders (PTLD). However, the clinical relevance and criteria for EBV serological reactivation in EBV-seropositive transplant recipients is unclear. EBV-specific antibodies: viral capsid immunoglobulm G [IgG (VCA)], nuclear antigen (EBNA) IgG, immunoglobulin M [IgM (VCA)] and early antigen IgG (EA) were prospectively analyzed in 71 adult kidney transplant recipients, before starting immunosuppression, when they were uraemic, and after transplantation. A total of 351 serum samples were tested. Relevance of different EBV reactivation-related variables were analyzed using the chi-square test. In 37 of 71 (52.1%) patients IgM (VCA) or IgG (EA) were detected when they were uraemic. EBV reactivation occurred in 25 of 71 (35.2%) patients, with clinical symptoms (fever, leukopenia, kidney function impairment, and increase in transaminases) in nine cases. One of 71 patients developed a PTLD, without detection of serologically EBV reactivation, but with an increase in EBV viral load. Absence of mycophenolate mofetil, that inhibits lymphocyte proliferation and antibody production, in immunosuppression was statistically significantly associated with EBV reactivation (p = 0.015). Serological diagnosis of EBV reactivation should be based on strict criteria (IgM (VCA) seroconversion, four-fold increase in IgM (VCA) or IgG (EA), or four-fold decrease in IgG (EBNA) titers and on analysis of serial samples. Some EBV-seropositive patients at high risk of developing PTLD could benefit from this diagnostic methodology.
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