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  • Title: Prevalence and Risk Factors of BK Viremia and Clinical Impact of BK Virus Surveillance on Outcomes in Kidney Transplant Recipients: A Single-Center Cross-Sectional Study.
    Author: Ji J, Feng S, Jiang Y, Wang W, Zhang X.
    Journal: Exp Clin Transplant; 2019 Dec; 17(6):727-731. PubMed ID: 30995893.
    Abstract:
    OBJECTIVES: BK virus is a polyomavirus that can cause nephropathy and graft loss after kidney transplant. The aim of our study was to screen the BK viremia prevalence, to understand the value of the inter-vention for BK virus nephropathy, and to determine the risk factors associated with BK viremia after kidney transplant in our center. MATERIALS AND METHODS: Our retrospective cross-sectional study included 91 adult kidney transplant recipients who were seen between 2015 and 2017 and who had follow-up from 1 month to over 2 years. BK viremia was evaluated by use of plasma quantitative polymerase chain reaction. The prevalence of BK viremia and the clinical treatments and outcomes of BK virus nephropathy were assessed. RESULTS: The prevalence of BK viremia was 5.5% (5/91 patients). BK virus nephropathy was confirmed by allograft biopsy in 4.4% (4/91 patients) of all patients. Delayed graft function was found to be an independent risk factor for BK viremia (P < .001). Patients with BK viremia had significantly higher serum creatinine levels (P = .04). Patients who were diagnosed with BK viremia at 1 to 5 years after kidney transplant had higher serum creatinine (P = .02) and uric acid levels (P = .02). After reduction or discontinuation of calcineurin inhibitor, BK virus was cleared in all patients with BK virus nephropathy, with higher level of serum creatinine but no graft loss. CONCLUSIONS: Delayed graft function was considered as a risk factor for viremia. Early detection of BK viremia replication is important. The strategy of reduction of immunosuppression was effective for BK virus nephropathy and graft function improvement.
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