title: Epstein-Barr virus load for early detection of lymphoproliferative disorder in pediatric renal transplant recipients.
abstract: OBJECTIVE
  The aims of this study were to establish a protocol for monitoring Epstein-Barr virus (EBV) infection for identification of pediatric renal transplant recipients with a high risk of developing posttransplant lymphoproliferative disorder (PTLD) and to predict the development of PTLD.
  
  
  METHODS
  Peripheral blood mononuclear cells (PBMCs) and plasma EBV loads were measured by nested PCR (n-PCR) and real-time PCR (r-PCR) every 1 - 3 months after grafting in 17 pediatric recipients who were seronegative for EBV before grafting (4 with EBV-associated symptoms, including 2 with PTLD (Group A); 6 with asymptomatic persistent high EBV loads in PBMCs of > 1,000 copies/µgDNA for over 6 months (Group B); and 7 with neither EBV-associated symptoms nor persistent high EBV loads in PBMCs (Group C)).
  
  
  RESULTS
  n-PCR revealed EBV-DNA in PBMCs from all patients. The EBV genome was present in plasma in 3 (75%), 1 (17%), and 0 (0%) in Groups A, B and C (p < 0.01 for A vs. B and A vs. C). EBV loads detected by r-PCR in PBMCs were significantly higher in Groups A (p < 0.05) and B (p < 0.01) compared to Group C. EBV genomes in plasma were detected by n- and r-PCR in only the 2 cases with PTLD. One patient with lymphadenitis in Group A and 1 patient in Group B had EBV-DNA in plasma based on n-PCR, but the viral loads using r-PCR were < 250 copies/ml.
  
  
  CONCLUSIONS
  EBV loads in PBMCs alone are insufficient for predicting EBV-associated symptoms including PTLD. Plasma EBV loads (over 250 copies/ml) estimated by r-PCR may be useful to distinguish PTLD from other EBV-associated diseases or asymptomatic viremia.
authors: Department of Pediatrics, Kochi Medical School, Kochi University, Kochi, Tokyo, Japan.
authors: M
authors: M
authors: Ishihara
authors: E
authors: E
authors: Tanaka
authors: T
authors: T
authors: Sato
authors: H
authors: H
authors: Chikamoto
authors: M
authors: M
authors: Hisano
authors: Y
authors: Y
authors: Akioka
authors: S
authors: S
authors: Dohno
authors: A
authors: A
authors: Maeda
authors: M
authors: M
authors: Hattori
authors: H
authors: H
authors: Wakiguchi
authors: M
authors: M
authors: Fujieda
mesh_terms: D000293:Adolescent; D000998:Antiviral Agents / Q000627:therapeutic use; D002648:Child; D002675:Child, Preschool; D020031:Epstein-Barr Virus Infections / Q000150:complications* / Q000188:drug therapy; D005260:Female; D004854:Herpesvirus 4, Human / Q000235:genetics / Q000302:isolation & purification*; D006801:Humans; D007166:Immunosuppressive Agents / Q000627:therapeutic use; D016030:Kidney Transplantation / Q000009:adverse effects*; D008232:Lymphoproliferative Disorders / Q000175:diagnosis* / Q000209:etiology / Q000821:virology; D008297:Male; D016133:Polymerase Chain Reaction; D019562:Viral Load
chemical_list: D000998:Antiviral Agents; D007166:Immunosuppressive Agents