NDLI: High Frequency and Diversity of Rearrangements in Polyomavirus BK Noncoding Regulatory Regions Cloned from Urine and Plasma of Israeli Renal Transplant Patients and Evidence for a New Genetic Subtype ▿ †

Content Provider	PubMed Central
Author	Perets, Tsachi Tsadok Silberstein, Ilana Jana, Rubinov Sarid, Ronit Mendelson, Ella Shulman, Lester M.
Abstract	Polyomavirus BK (BKV) establishes latent infection in various human tissues, including the kidney. Reactivation following renal transplantation (RT) may cause BKV-associated nephropathy, leading to graft loss. BKV reactivation is often associated with extensive rearrangements in the BKV noncoding regulatory region (NCRR). We explored the formation and predominance of the rearrangements versus the diversity of the rearrangements by cloning and characterizing PCR-amplified NCRR sequences from six Israeli RT patients. We found a high frequency and a high degree of diversity of rearrangements: NCRRs that contained major rearrangements (mrNCRRs), including large insertions and deletions, were detected in 0 to 100% of the clones from individual samples (mean, 50% and 67% in plasma and urine, respectively). In addition, we found a high frequency of mrNCRRs that contained single-nucleotide variations (snvNCRRs) among identical mrNCRRs and archetype clones. mrNCRRs were present in plasma and in concomitantly collected urine samples, but for each patient, only a subset of the mrNCRRs and snvNCRRs were present in both compartments at the same time and/or in subsequent samples from the same compartment. Some mrNCRRs were observed over several months, indicating the continuous replication of the viral genomes carrying them. Phylogenetic analysis based on the snvNCRR in the archetype clones grouped isolates from four of the patients into a new subgroup of genotype IV. Genotypes Ib-1 and Ib-2 were also found. Isolates from two patients had NCRRs from two genotypes, one concurrently with a RT and one after a second RT. Our study prompts further investigation of the functional consequences of NCRR rearrangements to assess their biological significance and their putative role in disease progression and prognosis.
Related Links	http://dx.doi.org/10.1128/jcm.02065-08
Ending Page	1411
Page Count	10
Starting Page	1402
File Format	PDF
ISSN	00951137
e-ISSN	1098660X
Journal	Journal of Clinical Microbiology
Issue Number	5
Volume Number	47
Language	English
Publisher	American Society for Microbiology (ASM)
Publisher Date	2009-05-01
Access Restriction	Open
Rights Holder	American Society for Microbiology (ASM)
Subject Keyword	Microbiology (medical) Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Microbiology (medical)

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