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  • Title: Prospective Epstein-Barr virus-related post-transplant lymphoproliferative disorder prevention program in pediatric allogeneic hematopoietic stem cell transplant: virological monitoring and first-line treatment.
    Author: Chiereghin A, Prete A, Belotti T, Gibertoni D, Piccirilli G, Gabrielli L, Pession A, Lazzarotto T.
    Journal: Transpl Infect Dis; 2016 Feb; 18(1):44-54. PubMed ID: 26574232.
    Abstract:
    BACKGROUND: In 28 pediatric allogeneic hematopoietic stem cell transplant (allo-HSCT) recipients, we aimed to evaluate: (i) the impact of routine Epstein-Barr virus (EBV) DNA monitoring on the development of EBV-related post-transplant lymphoproliferative disorder (EBV-PTLD); (ii) the incidence of EBV infection and the potential risk factors; and (iii) the suitability of whole blood (WB) as clinical specimen to monitor the risk of patients to develop EBV-PTLD. METHODS: Quantitative real-time polymerase chain reaction assay was performed on WB samples for all patients. EBV DNA quantification also in peripheral blood mononuclear cells (PBMCs) samples was adopted for the patients at higher risk of developing EBV-PTLD (≥ 10,000 copies/mL WB). RESULTS: High EBV DNAemia levels were observed in 37.5% of the actively infected recipients (57.1%). Severe aplastic anemia, matched-unrelated donor transplant, the reduced-intensity conditioning regimen and, to a lesser extent, the in vivo T-cell depletion with anti-thymocyte immunoglobulin were associated with high viral load. A significant correlation between EBV DNA levels in WB and PBMC samples was obtained (r = 0.755, P < 0.001). A similar kinetics of EBV DNA in the 2 blood compartments was observed. Clinically, both specimen types appeared to be equally informative to assess the risk of patients to develop PTLD. On the basis of EBV DNAemia levels, in 3 patients (10.7%) immunosuppressive therapy was reduced and 1 patient (3.5%) received early treatment for probable EBV disease. No patients developed EBV-PTLD. CONCLUSION: WB proved to be a suitable clinical specimen to monitor EBV DNA load after allo-HSCT for the management of EBV infection and PTLD prevention.
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