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  • Title: Monitoring of Epstein-Barr virus load and antibody in pediatric renal transplant patients.
    Author: Sato T, Fujieda M, Tanaka E, Miyamura M, Chikamoto H, Hisano M, Akioka Y, Ishiura Y, Dohno S, Maeda A, Hattori M, Wakiguchi H.
    Journal: Pediatr Int; 2008 Aug; 50(4):454-8. PubMed ID: 19143966.
    Abstract:
    BACKGROUND: Epstein-Barr virus (EBV) infection can lead to life-threatening post-transplant lymphoproliferative disorder (PTLD). The aim of the present study was to establish EBV monitoring methods to prevent PTLD. METHODS: EBV-DNA load was investigated, using real-time polymerase chain reaction (PCR) and anti-EBV antibody titers, in peripheral blood mononuclear cells of 21 renal transplant patients (seven recipients who were EBV-seronegative, R[-]; 14 who were EBV-seropositive, R[+]) before grafting. The mean age at entry and the mean follow-up period was 7.8 years of age (range, 3.3-12.0 years) and 1.8 years (range, 0.4-4.0 years), respectively, in the R(-) group, and 12.5 years of age (range, 3.9-17.7 years) and 3.8 years (range, 0.8-8.2 years) in the R(+) group, respectively. RESULTS: The mean maximum load of the EBV genome was 1071 copies/microg DNA (range, 106-20700 copies/microg DNA) in the R(-) group, and 61 copies/microg DNA (range, <50-552 copies/microg DNA) in the R(+) group. During follow up no patient in the R(+) group had any noticeable symptoms that could be related to EBV, but three recipients in the R(-) group developed EBV-related symptoms including adenoid hypertrophy, cervical lymphadenopathy, and PTLD (B cell lymphoma), in one patient each. In the R(-) group the first leukocyte-associated viremia was detected at 30-180 days, and seroconversion at 43-266 days after transplantation. CONCLUSIONS: Viral DNA detection using PCR is a useful tool for EBV surveillance, but the maximum EBV load was not markedly elevated (2474 copies/microg DNA) in a patient with PTLD. Therefore, EBV surveillance using only monitoring of EBV load in peripheral leukocyte may be insufficient. Histology may therefore be necessary to accurately diagnose PTLD.
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