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Al-Qur'ān

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Background: BK virus associated nephropathy occurs in 1-10% of kidney transplant recipients and may be a cause of graft loss. This infection is difficult to manage because of the absence of specific therapy. Cidofovir, a DNA polymerase inhibitor approved for the treatment of CMV retinitis, has shown in vitro activity against BK virus and some clinical efficacy when used at low-dose in uncontrolled series. Objective: To assess the efficacy of low-dose Cidofovir in the treatment of BK virus associated nephropathy. Method: Two adult kidney transplant recipients with biopsy-proven BK nephropathy and persistent high viremia (>10,000 copies/ml) despite 3-month reduction of immunosuppressive therapy were treated by Cidofovir 0.5 mg/kg fortnightly for a total of 16 weeks (8 doses). Clinical response was assessed by following BK viremia. Results: No decrease in BK viremia was observed at any point during cidofovir therapy (see figure). Creatinine clearance remained stable during therapy and no side-effects of Cidofovir were observed. Conclusions: Low-dose Cidofovir therapy was not associated with a clearance or with a significant decrease of BK viremia. This pilot study does not confirm previous reports suggesting clinical efficacy of Cidofovir for BK virus associated nephropathy.

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Puteanus

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Colbertinus

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