Haruhiko Murata

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Three SV40 escape mutants were identified by selection in the presence of monoclonal antibodies with neutralizing activity. The VP1 amino acid alterations in these mutants were: (1) K73-->E (in loop BC); (2) D77-->E (in loop BC); (3) K171-->R (in loop EF); and (4) Q175-->H (in loop EF). These residues are clustered in close proximity to each other on the(More)
We present in this paper a new image stabilization technology to address motion blurs from camera shake with a regular- and short-exposure image pair taken consecutively. The proposed motion estimation process in this technology adopts a Wiener filter to estimate motion blur using few selected feature corresponding points in the image pair. To obtain a more(More)
MicroRNAs (miRNAs) are small noncoding RNAs that negatively regulate gene expression post-transcriptionally. They play a critical role in developmental and physiological processes and have been implicated in the pathogenesis of several diseases including cancer. To identify miRNA signatures associated with different stages of neoplastic development, we(More)
Polyomaviruses are nonenveloped viruses with capsids composed primarily of 72 pentamers of the viral VP1 protein, which forms the outer shell of the capsid and binds to cell surface oligosaccharide receptors. Highly conserved VP1 proteins from closely related polyomaviruses recognize different oligosaccharides. To determine whether amino acid changes(More)
From stocks of adenovirus and poliovirus prepared in primary rhesus macaque kidney cells and dating from 1956 to 1961, the time when SV40 contaminated some poliovirus vaccine lots, we have recovered ten isolates of SV40. Of these ten isolates, based on the C-terminal region of T antigen, five novel strains of SV40 have been identified. Additionally, three(More)
A plaque variant of SV40 that was first isolated in the 1960s, designated SV40-LP(KT), was molecularly cloned and subjected to sequence analysis. The genome of SV40-LP(KT) was found to be nearly identical to the previously described isolate known as 777. However, SV40-LP(KT) contained a mutation in the VP1 coding region resulting in a change of histidine(More)
The nucleoprotein of respiratory syncytial virus (RSV-N) is immunogenic and elicits an IgG response following infection. The RSV-N gene was cloned into a mammalian expression vector, pREN2, and the expressed luciferase-tagged protein (Ruc-N) detected anti-RSV-N-specific IgG antibodies using a high-throughput immunoprecipitation method (the luciferase(More)
A neutralization assay incorporating a quantitative SYBR Green PCR endpoint has been developed for SV40. The present study demonstrates that crude virus samples can serve as suitable amplification templates for quantitative PCR without the need for nucleic acid extraction. The denaturation temperature of thermocycling appears to be sufficient to release the(More)
Crude cell lysates are increasingly used as input for direct analysis by reverse transcription quantitative PCR (RT-qPCR), particularly for high-throughput applications. We previously demonstrated that a simple buffer containing a non-ionic detergent can serve as an inexpensive alternative to commercial cell-lysis reagents for the preparation of(More)
Sample nucleic acid purification can often be rate-limiting for conventional quantitative PCR (qPCR) workflows. We recently developed high-throughput virus microneutralization assays using an endpoint assessment approach based on reverse transcription qPCR (RT-qPCR). The need for cumbersome RNA purification is circumvented in our assays by making use of a(More)