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Τρίτη 21 Αυγούστου 2018

Epidemiology of and Risk Factors for BK Polyomavirus Replication and Nephropathy in Pediatric Renal Transplant Recipients: An International CERTAIN Registry Study

Background BK polyomavirus-associated nephropathy (BKPyVAN) constitutes a serious cause of kidney allograft failure, but large-scale data in pediatric renal transplant recipients and a comprehensive analysis of specific risk factors are lacking. Methods We analyzed data of 313 patients in the Cooperative European Paediatric Renal Transplant Initiative (CERTAIN) registry, with an observation period of 3.3 years (range, 1 – 5). The net state of immunosuppressive therapy was assessed by the modified Vasudev score. Results Presumptive BKPyVAN (defined as sustained (>3 weeks) high-level BK viremia >104 copies/mL) within 5 years posttransplant occurred in 49/311 (15.8%) of patients, and biopsy-proven BKPyVAN in 14/313 (4.5%). BKPyV viremia was observed in 115/311 patients (36.7%), of whom 11 of 115 (9.6%) developed viremia late, ie, after the second year posttransplant. In 6/48 patients (12.5%) with high-level viremia and in 3/14 (21.4%) with BKPyVAN this respective event occurred late. According to multivariable analysis, BKPyV viremia and/or BKPyVAN were associated with a higher net state of immunosuppression (OR 1.3, p

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