BACKGROUND: Polyomavirus-associated nephropathy (PVAN) is one of the most common viral disease affecting renal allograft, with BK being the most frequent causal agent and JCV being considered responsible in <3% of the cases. OBJECTIVES: To quantify polyomaviruses BK and JC load by real-time TaqMan PCR in tissue specimens (renal and ureteral) from kidney transplant recipients. STUDY DESIGN AND METHODS: One-hundred-thirty-eight specimens (125 kidneys, 13 ureters) obtained from 109 patients were evaluated by quantitative real-time PCR for the detection of BKV- and JCV-DNA. Demographic, virological, and histopathological data were collected. RESULTS: BKV-DNA was positive in 32 of 109 patients (29.6%) and JCV-DNA in 20 of 109 patients (18.3%). The highest BK viral loads (>10(4) genome equivalents/cell) were found in two renal samples with histopathologically confirmed PVAN; while JC viral load was >10(4) genome equivalents/cell in one ureteral sample. CONCLUSIONS: Although quantitation of viral DNA on renal allograft biopsies could be complementary to histopathological evaluation and the highest viral load are detectable in renal specimens with PVAN, the identification of a diagnostic cut-off should require further studies.

Polyomaviruses BK- And JC-DNA quantitation in kidney allograft biopsies

Costa C.;BERGALLO, Massimiliano;SIDOTI, Francesca;TERLIZZI, Maria Elena;CAVALLO, Rossana
2009

Abstract

BACKGROUND: Polyomavirus-associated nephropathy (PVAN) is one of the most common viral disease affecting renal allograft, with BK being the most frequent causal agent and JCV being considered responsible in <3% of the cases. OBJECTIVES: To quantify polyomaviruses BK and JC load by real-time TaqMan PCR in tissue specimens (renal and ureteral) from kidney transplant recipients. STUDY DESIGN AND METHODS: One-hundred-thirty-eight specimens (125 kidneys, 13 ureters) obtained from 109 patients were evaluated by quantitative real-time PCR for the detection of BKV- and JCV-DNA. Demographic, virological, and histopathological data were collected. RESULTS: BKV-DNA was positive in 32 of 109 patients (29.6%) and JCV-DNA in 20 of 109 patients (18.3%). The highest BK viral loads (>10(4) genome equivalents/cell) were found in two renal samples with histopathologically confirmed PVAN; while JC viral load was >10(4) genome equivalents/cell in one ureteral sample. CONCLUSIONS: Although quantitation of viral DNA on renal allograft biopsies could be complementary to histopathological evaluation and the highest viral load are detectable in renal specimens with PVAN, the identification of a diagnostic cut-off should require further studies.
JOURNAL OF CLINICAL VIROLOGY
44
1
20
23
Kidney transplantation; BKV; JCV; Renal biopsy; Polyomavirus-associated nephropathy; Ureteral stenosis
Costa C.; Bergallo M.; Sidoti F.; Astegiano S.; Terlizzi M.E.; Mazzucco G.; Segoloni G.P.; Cavallo R.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2318/56753
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