We used real-time polymerase chain reaction (PCR) technology to detect BK virus (BKV) in H and E-stained kidney biopsy sections, using laser capture microdissection. Renal allograft biopsy specimens from 4 patients with the histopathologic diagnosis of BKV-associated nephropathy (BKVAN; group 1) and 3 patients suspected to have BKVAN but without diagnostic histologic features (group 2) were ret...

BK virus (BKV) is the causative agent for polyomavirus-associated nephropathy, a severe disease found in renal transplant patients due to reactivation of a persistent BKV infection. BKV replication relies on the interactions of BKV with many nuclear components, and subnuclear structures such as promyelocytic leukemia nuclear bodies (PML-NBs) are known to play regulatory roles during a number of...

Genomic sequences of the human polyomaviruses, JC virus (JCV) and BK virus (BKV), and simian virus 40 (SV40) have been reported from several types of human brain tumors, but there have been no population-based seroepidemiologic studies to evaluate the association between polyomavirus infection and brain tumors. We conducted a case-control study, nested within a prospective cohort, to investigat...

Hybrid viral genomes were used to investigate the influence of specific polyomavirus sequences on the transforming behavior of JC virus (JCV). One set of chimeric DNAs was made by exchanging the regulatory regions between JCV and simian virus 40 (SV40) or JCV and BK virus (BKV). A second set of constructs was produced that expressed hybrid JCV-BKV T proteins under the control of either JCV or B...

OBJECTIVE To evaluate value of quantitative and qualitative detection of BK virus (BKV) and JC virus (JCV) in timely diagnosing polyomavirus-associated nephropathy (PVAN) occurring inrenal transplantation recipients. METHODS We collected 306 cases of urine specimen and 310 cases of blood specimen from 306 patients who underwent renal transplant. Levels of BKV and JCV in blood and urine were d...

The localization of both the large T and small t tumor (T) antigens in cultured cells (Vn 12 cells) of hamster brain tumors induced with BK virus (BKV), a new human papovavirus, was studied by an enzyme labelled antibody method at both the light and electron microscopic levels. Under the light microscope, BKV T antigen was observed in the nucleus, except for the nucleoli, of cells in interphase...

BACKGROUND BK virus (BKV) belongs to the human Polyomaviridae and the primary BKV infection is occurred during childhood then the virus could be latent through life, especially in the kidneys and urinary system. It became reactive after an immunocompromised status, such as pregnancy or transplantation. Isolated BKV from different locations of the world is grouped into four subtypes using serolo...

BACKGROUND BK virus (BKV) is ubiquitous in human beings. Virus reactivation may occur in immunocompromised settings. The aim of this study was to compare BKV excretion in acquired immunocompromised children (kidney transplant recipients and steroid resistant nephrotic syndrome) with normal population. MATERIALS AND METHODS One hundred and thirty one participants less than 20 years were recrui...

We have analyzed the cis-acting sequence elements and properties of the origin of DNA replication of human papovavirus BK (BKV). The precise boundaries of the origin varied, depending on the cell type and the viral T antigen used for assay. The BKV minimal origin of replication consisted of an inverted repeat, T-antigen-binding site II, and a 20-base-pair AT block when assayed in monkey kidney ...

Two plaque morphology BK virus (BKV) mutants (pm526 and pm527) rescued from a hamster pineocytoma cell line Pc13 were characterized and compared with a similarly rescued and previously characterized mutant (pm522), its derivatives (tr530, tr531, and tr532), and the wild type (501) for their biological activities and for the structures of their transcriptional control regions. The two mutants gr...