Masashi Mizokami

Analysis of HCV genotypes from blood donors shows three new HCV type 6 subgroups exist in Myanmar. (2006)

Shinji, Toshiyuki, Kyaw, Yi Yi, Gokan, Katsunori, Tanaka, Yasuhito, Ochi, Koji, Kusano, Nobuchika, ...

The prevalence of hepatitis C virus (HCV) genotypes in Myanmar in comparison with the rest of Southeast Asia is not well known. Serum samples were obtained from 201 HCV antibody-positive volunteer...

Journal of General Virology (2005), 86, 2047–2056 DOI 10.1099/vir.0.80922-0 Correspondence (2005)

Masashi Mizokami

According to the World Health Organization, hepatitis B virus (HBV) infection is one of the major global public health problems. Of the two billion people who have been infected with HBV worldwide,...

Role of hepatitis B virus genotypes Ba and C, core promoter and precore mutationson hepatocellular carcinoma: a case control study (2004)

Yuen, Man-Fung, Tanaka, Yasuhito, Mizokami, Masashi, Yuen, John Chi-Hang, Wong, Danny Ka-Ho, Yuan, He-Jun, ...

The role of hepatitis B virus (HBV) genotypes, core promoter (CP) and precore mutants on hepatocellular carcinoma (HCC) is still controversial. We aimed to determine their role on the development and...

Role of hepatitis B virus genotypes Ba and C, core promoter and precore mutations on hepatocellular carcinoma: a case control study (2004)

Yuen, Man-Fung, Tanaka, Yasuhito, Mizokami, Masashi, Yuen, John Chi-Hang, Wong, Danny Ka-Ho, Yuan, He-Jun, ...

The role of hepatitis B virus (HBV) genotypes, core promoter (CP) and precore mutants on hepatocellular carcinoma (HCC) is still controversial. We aimed to determine their role on the development and...

Evaluation of Accumulation of Hepatitis C Virus Mutations in a Chronically Infected Chimpanzee: Comparison of (2000)

The Core, Nsb Regions, Ling Lu, Tatsunori Nakano, Etsuro Orito, Masashi Mizokami, ...

Four hepatitis C virus genome regions (the core, E1, HVR1, and NS5b) were amplified and sequenced from yearly samples obtained from a chronically infected chimpanzee over a 12-year span. Nucleotide...

Development of a TT Virus DNA Quantification System Using Real-Time Detection PCR

Kato, Takanobu, Mizokami, Masashi, Mukaide, Motokazu, Orito, Etsuro, Ohno, Tomoyoshi, Nakano, Tatsunori, ...

Although TT virus (TTV) was isolated from a cryptogenic posttransfusion hepatitis patient, its pathogenic role remains unclear. It has been reported that the majority of the healthy population is...

Evaluation of Accumulation of Hepatitis C Virus Mutations in a Chronically Infected Chimpanzee: Comparison of the Core, E1, HVR1, and NS5b Regions

Lu, Ling, Nakano, Tatsunori, Orito, Etsuro, Mizokami, Masashi, Robertson, Betty H.

Four hepatitis C virus genome regions (the core, E1, HVR1, and NS5b) were amplified and sequenced from yearly samples obtained from a chronically infected chimpanzee over a 12-year span. Nucleotide...

Characteristics of Hepatitis B Virus Isolates of Genotype G and Their Phylogenetic Differences from the Other Six Genotypes (A through F)

Kato, Hideaki, Orito, Etsuro, Gish, Robert G., Sugauchi, Fuminaka, Suzuki, Seiji, Ueda, Ryuzo, ...

Eight hepatitis B virus (HBV) isolates of genotype G were recovered from patients and sequenced over the entire genome. Six of them had a genomic length of 3,248 bp and two had genomic lengths of...

Hepatitis B Virus of Genotype B with or without Recombination with Genotype C over the Precore Region plus the Core Gene

Sugauchi, Fuminaka, Orito, Etsuro, Ichida, Takafumi, Kato, Hideaki, Sakugawa, Hiroshi, Kakumu, Shinichi, ...

The entire nucleotide sequences of 70 hepatitis B virus (HBV) isolates of genotype B (HBV/B), including 38 newly determined and 32 retrieved from the international DNA database (DDBJ/EMBL/GenBank),...

A comparison of the molecular clock of hepatitis C virus in the United States and Japan predicts that hepatocellular carcinoma incidence in the United States will increase over the next two decades

Tanaka, Yasuhito, Hanada, Kousuke, Mizokami, Masashi, Yeo, Anthony E. T., Shih, J. Wai-Kuo, Gojobori, Takashi, ...

The prevalence of hepatitis C virus (HCV)-related hepatocellular carcinoma (HCC) is considerably lower in the U.S. than in Japan. To elucidate this difference, we determined the time origin of the...

Novel Hepatitis B Virus Genotype A Subtyping Assay That Distinguishes Subtype Aa from Ae and Its Application in Epidemiological Studies

Hasegawa, Izumi, Tanaka, Yasuhito, Kramvis, Anna, Kato, Takanobu, Sugauchi, Fuminaka, Acharya, Subrat K., ...

The eight genotypes of hepatitis B virus (HBV) have different geographical distributions, virological characteristics, and clinical manifestations. A unique subtype of HBV genotype A (HBV/A) was...

Longitudinal Study of Hepatitis Activity and Viral Replication before and after HBeAg Seroconversion in Chronic Hepatitis B Patients Infected with Genotypes B and C

Yuen, Man-Fung, Fung, Scott K., Tanaka, Yasuhito, Kato, Takanobu, Mizokami, Masashi, Yuen, John Chi-Hang, ...

The aims of this study were to compare chronic hepatitis B (CHB) patients with genotypes B and C for the probability of HBeAg seroconversion, hepatitis activity, and viral replication before and...

Nonhepatic Cell Lines HeLa and 293 Support Efficient Replication of the Hepatitis C Virus Genotype 2a Subgenomic Replicon

Kato, Takanobu, Date, Tomoko, Miyamoto, Michiko, Zhao, Zijiang, Mizokami, Masashi, Wakita, Takaji

The hepatitis C virus (HCV) genotype 2a subgenomic replicon can replicate in two human non-hepatocyte-derived cell lines, HeLa and 293, with in vitro-transcribed replicon RNA. Sequencing analysis...

Novel Type of Hepatitis B Virus Mutation: Replacement Mutation Involving a Hepatocyte Nuclear Factor 1 Binding Site Tandem Repeat in Chronic Hepatitis B Virus Genotype E

Fujiwara, Kei, Tanaka, Yasuhito, Paulon, Emma, Orito, Etsuro, Sugiyama, Masaya, Ito, Kiyoaki, ...

The genetic diversity of hepatitis B virus (HBV) strains has evolved through mutations such as point mutations, deletions or insertions, and recombination. We identified and characterized a novel...

Detection of Anti-Hepatitis C Virus Effects of Interferon and Ribavirin by a Sensitive Replicon System

Kato, Takanobu, Date, Tomoko, Miyamoto, Michiko, Sugiyama, Masaya, Tanaka, Yasuhito, Orito, Etsuro, ...

Although combination therapy with interferon and ribavirin has improved the treatment for chronic hepatitis C virus (HCV) infection, the detailed anti-HCV effect of ribavirin in clinical...

Development of a TT Virus DNA Quantification System Using Real-Time Detection PCR

Kato, Takanobu, Mizokami, Masashi, Mukaide, Motokazu, Orito, Etsuro, Ohno, Tomoyoshi, Nakano, Tatsunori, ...

Although TT virus (TTV) was isolated from a cryptogenic posttransfusion hepatitis patient, its pathogenic role remains unclear. It has been reported that the majority of the healthy population is...

Evaluation of Accumulation of Hepatitis C Virus Mutations in a Chronically Infected Chimpanzee: Comparison of the Core, E1, HVR1, and NS5b Regions

Lu, Ling, Nakano, Tatsunori, Orito, Etsuro, Mizokami, Masashi, Robertson, Betty H.

Four hepatitis C virus genome regions (the core, E1, HVR1, and NS5b) were amplified and sequenced from yearly samples obtained from a chronically infected chimpanzee over a 12-year span. Nucleotide...

Characteristics of Hepatitis B Virus Isolates of Genotype G and Their Phylogenetic Differences from the Other Six Genotypes (A through F)

Kato, Hideaki, Orito, Etsuro, Gish, Robert G., Sugauchi, Fuminaka, Suzuki, Seiji, Ueda, Ryuzo, ...

Eight hepatitis B virus (HBV) isolates of genotype G were recovered from patients and sequenced over the entire genome. Six of them had a genomic length of 3,248 bp and two had genomic lengths of...

Hepatitis B Virus of Genotype B with or without Recombination with Genotype C over the Precore Region plus the Core Gene

Sugauchi, Fuminaka, Orito, Etsuro, Ichida, Takafumi, Kato, Hideaki, Sakugawa, Hiroshi, Kakumu, Shinichi, ...

The entire nucleotide sequences of 70 hepatitis B virus (HBV) isolates of genotype B (HBV/B), including 38 newly determined and 32 retrieved from the international DNA database (DDBJ/EMBL/GenBank),...

A comparison of the molecular clock of hepatitis C virus in the United States and Japan predicts that hepatocellular carcinoma incidence in the United States will increase over the next two decades

Tanaka, Yasuhito, Hanada, Kousuke, Mizokami, Masashi, Yeo, Anthony E. T., Shih, J. Wai-Kuo, Gojobori, Takashi, ...

The prevalence of hepatitis C virus (HCV)-related hepatocellular carcinoma (HCC) is considerably lower in the U.S. than in Japan. To elucidate this difference, we determined the time origin of the...

Novel Hepatitis B Virus Genotype A Subtyping Assay That Distinguishes Subtype Aa from Ae and Its Application in Epidemiological Studies

Hasegawa, Izumi, Tanaka, Yasuhito, Kramvis, Anna, Kato, Takanobu, Sugauchi, Fuminaka, Acharya, Subrat K., ...

The eight genotypes of hepatitis B virus (HBV) have different geographical distributions, virological characteristics, and clinical manifestations. A unique subtype of HBV genotype A (HBV/A) was...

Longitudinal Study of Hepatitis Activity and Viral Replication before and after HBeAg Seroconversion in Chronic Hepatitis B Patients Infected with Genotypes B and C

Yuen, Man-Fung, Fung, Scott K., Tanaka, Yasuhito, Kato, Takanobu, Mizokami, Masashi, Yuen, John Chi-Hang, ...

The aims of this study were to compare chronic hepatitis B (CHB) patients with genotypes B and C for the probability of HBeAg seroconversion, hepatitis activity, and viral replication before and...

Nonhepatic Cell Lines HeLa and 293 Support Efficient Replication of the Hepatitis C Virus Genotype 2a Subgenomic Replicon

Kato, Takanobu, Date, Tomoko, Miyamoto, Michiko, Zhao, Zijiang, Mizokami, Masashi, Wakita, Takaji

The hepatitis C virus (HCV) genotype 2a subgenomic replicon can replicate in two human non-hepatocyte-derived cell lines, HeLa and 293, with in vitro-transcribed replicon RNA. Sequencing analysis...

Novel Type of Hepatitis B Virus Mutation: Replacement Mutation Involving a Hepatocyte Nuclear Factor 1 Binding Site Tandem Repeat in Chronic Hepatitis B Virus Genotype E

Fujiwara, Kei, Tanaka, Yasuhito, Paulon, Emma, Orito, Etsuro, Sugiyama, Masaya, Ito, Kiyoaki, ...

The genetic diversity of hepatitis B virus (HBV) strains has evolved through mutations such as point mutations, deletions or insertions, and recombination. We identified and characterized a novel...

Detection of Anti-Hepatitis C Virus Effects of Interferon and Ribavirin by a Sensitive Replicon System

Kato, Takanobu, Date, Tomoko, Miyamoto, Michiko, Sugiyama, Masaya, Tanaka, Yasuhito, Orito, Etsuro, ...

Although combination therapy with interferon and ribavirin has improved the treatment for chronic hepatitis C virus (HCV) infection, the detailed anti-HCV effect of ribavirin in clinical...

Molecular Evolution of Hepatitis B Virus over 25 Years

Osiowy, Carla, Giles, Elizabeth, Tanaka, Yasuhito, Mizokami, Masashi, Minuk, Gerald Y.

Determining the longitudinal molecular evolution of hepatitis B virus (HBV) is difficult due to HBV's genomic complexity and the need to study paired samples collected over long periods of time. In...

Simultaneous Quantification and Genotyping of Hepatitis B Virus for Genotypes A to G by Real-Time PCR and Two-Step Melting Curve Analysis▿

Liu, Wen-Chun, Mizokami, Masashi, Buti, Maria, Lindh, Magnus, Young, Kung-Chia, Sun, Koun-Tem, ...

Both the viral titer and the genotype significantly determine clinical outcomes and responses to antiviral treatment in chronic hepatitis B virus (HBV) infection. A method was developed for...

Clinical and Virological Characteristics of Hepatitis B Virus Subgenotypes Ba, C1, and C2 in China▿

Wang, Zhanhui, Tanaka, Yasuhito, Huang, Yuehua, Kurbanov, Fuat, Chen, Jinjun, Zeng, Guobing, ...

Hepatitis B virus (HBV) subgenotypes Ba, C1 (Cs), and C2 (Ce) are the most prevalent HBV variants in China. To investigate the virological characteristics of these subgenotypes and their clinical...

Antiviral drug-resistant HBV: Standardization of nomenclature and assays and recommendations for management

Lok, Anna S., Zoulim, Fabien, Locarnini, Stephen, Bartholomeusz, Angeline, Ghany, Marc G., Pawlotsky, Jean-Michel, ...

Substantial advances have been made in the treatment of chronic hepatitis B in the past decade. Approved treatments for chronic hepatitis B include 2 formulations of interferon and 4 nucleos(t)ide...

The NS3 Helicase and NS5B-to-3′X Regions Are Important for Efficient Hepatitis C Virus Strain JFH-1 Replication in Huh7 Cells▿

Murayama, Asako, Date, Tomoko, Morikawa, Kenichi, Akazawa, Daisuke, Miyamoto, Michiko, Kaga, Minako, ...

The JFH-1 strain of hepatitis C virus (HCV) is a genotype 2a strain that can replicate autonomously in Huh7 cells. The J6 strain is also a genotype 2a strain, but its full genomic RNA does not...

Influence of Hepatitis B Virus X and Core Promoter Mutations on Hepatocellular Carcinoma among Patients Infected with Subgenotype C2▿

Shinkai, Noboru, Tanaka, Yasuhito, Ito, Kiyoaki, Mukaide, Motokazu, Hasegawa, Izumi, Asahina, Yasuhiro, ...

Hepatitis B virus (HBV) genotypes/subgenotypes and their related mutations in the HBV genome have been reported to be associated with hepatocellular carcinoma (HCC). To determine the HCC-associated...

Hepatitis B Virus Core-Related Antigens as Markers for Monitoring Chronic Hepatitis B Infection▿

Wong, Danny Ka-Ho, Tanaka, Yasuhito, Lai, Ching-Lung, Mizokami, Masashi, Fung, James, Yuen, Man-Fung

A sensitive chemiluminescence enzyme immunoassay has been developed for hepatitis B virus (HBV) core-related antigen (HBcrAg) detection. We aimed to investigate the usefulness of HBcrAg measurement...

Abbott RealTime Hepatitis C Virus (HCV) and Roche Cobas AmpliPrep/Cobas TaqMan HCV Assays for Prediction of Sustained Virological Response to Pegylated Interferon and Ribavirin in Chronic Hepatitis C Patients ▿

Matsuura, Kentaro, Tanaka, Yasuhito, Hasegawa, Izumi, Ohno, Tomoyoshi, Tokuda, Hiroshi, Kurbanov, Fuat, ...

Two commercial real-time PCR assays are currently available for sensitive hepatitis C virus (HCV) RNA quantification: the Abbott RealTime HCV assay (ART) and Roche Cobas AmpliPrep/Cobas TaqMan HCV...

Distribution of Hepatitis B Virus Genotypes among Patients with Chronic Infection in Japan Shifting toward an Increase of Genotype A▿

Matsuura, Kentaro, Tanaka, Yasuhito, Hige, Shuhei, Yamada, Gotaro, Murawaki, Yoshikazu, Komatsu, Masafumi, ...

Acute hepatitis B virus (HBV) infection has been increasing through promiscuous sexual contacts, and HBV genotype A (HBV/A) is frequent in patients with acute hepatitis B (AHB) in Japan. To compare...

Hepatitis B Virus Genotype C Prevails Among Chronic Carriers of the Virus in Korea

Bae, Si Hyun, Yoon, Seung Kew, Jang, Jeong Won, Kim, Chang Wook, Nam, Soon Woo, Choi, Jong Young, ...

Hepatitis B virus (HBV) is one of the major causative agents of chronic liver diseases in Korea. HBV has been classified into 8 genotypes by a divergence of >8% in the entire genomic sequence, and...