Makoto Mayumi

Overview

Best Publications

• A novel DNA virus (TTV) associated with elevated transaminase levels in posttransfusion hepatitis of unknown etiology.

  Tsutomu Nishizawa;Hiroaki Okamoto;Keiko Konishi;Hiroshi Yoshizawa

  1978
  Citations

• Typing Hepatitis B Virus by Homology in Nucleotide Sequence: Comparison of Surface Antigen Subtypes

  Hiroaki Okamoto;Fumio Tsuda;Hiroshi Sakugawa;Retno I. Sastrosoewignjo

  1618
  Citations

• Typing hepatitis C virus by polymerase chain reaction with type-specific primers: application to clinical surveys and tracing infectious sources.

  Hiroaki Okamoto;Yasushi Sugiyama;Shunichi Okada;Kiyohiko Kurai

  1564
  Citations

• Molecular cloning and characterization of a novel DNA virus (TTV) associated with posttransfusion hepatitis of unknown etiology

  Hiroaki Okamoto;Tsutomu Nishizawa;Naomi Kato;Masato Ukita

  1007
  Citations

• E Antigen and Anti-E in the Serum of Asymptomatic Carrier Mothers as Indicators of Positive and Negative Transmission of Hepatitis B Virus to Their Infants

  Kiyshi Okada;Ichiro Kamiyama;Minako Inomata;Mitsunobu Imai

  937
  Citations

• Hepatitis B virus with mutations in the core promoter for an e antigen-negative phenotype in carriers with antibody to e antigen.

  H Okamoto;F Tsuda;Y Akahane;Y Sugai

  717
  Citations

• Hepatitis B viruses with precore region defects prevail in persistently infected hosts along with seroconversion to the antibody against e antigen.

  H Okamoto;S Yotsumoto;Y Akahane;T Yamanaka

  616
  Citations

• Nucleotide sequence of the genomic RNA of hepatitis C virus isolated from a human carrier: comparison with reported isolates for conserved and divergent regions.

  Hiroaki Okamoto;Shunichi Okada;Yasushi Sugiyama;Kiyohiko Kurai

  575
  Citations

• Infection with Hepatitis GB Virus C in Patients on Maintenance Hemodialysis

  Kazuo Masuko;Takehiro Mitsui;Keiko Iwano;Chikao Yamazaki

  558
  Citations

• Fecal excretion of a nonenveloped DNA virus (TTV) associated with posttransfusion non-A-G hepatitis

  Hiroaki Okamoto;Yoshihiro Akahane;Masato Ukita;Masako Fukuda

  465
  Citations

• Hepatitis B virus strains with mutations in the core promoter in patients with fulminant hepatitis.

  Shunichi Sato;Kazuyuki Suzuki;Yoshihiro Akahane;Koichi Akamatsu

  456
  Citations

• Serological detection of hepatitis B virus genotypes by ELISA with monoclonal antibodies to type-specific epitopes in the preS2-region product.

  Sadakazu Usuda;Hiroaki Okamoto;Hiroko Iwanari;Kiyoshi Baba

  400
  Citations

• Naturally occurring escape mutants of hepatitis B virus with various mutations in the S gene in carriers seropositive for antibody to hepatitis B surface antigen.

  K Yamamoto;M Horikita;F Tsuda;K Itoh

  387
  Citations

• Marked genomic heterogeneity and frequent mixed infection of TT virus demonstrated by PCR with primers from coding and noncoding regions.

  Hiroaki Okamoto;Masaharu Takahashi;Tsutomu Nishizawa;Masato Ukita

  363
  Citations

• Fulminant hepatitis B: Induction by hepatitis B virus mutants defective in the precore region and incapable of encoding E antigen

  Yoshitane Kosaka;Kohjiro Takase;Mineo Kojima;Masaru Shimizu

  363
  Citations

• Hepatitis B e Antigen and Infectivity of Hepatitis B Virus

  T. Shikata;T. Karasawa;K. Abe;T. Uzawa

  357
  Citations

• Genotypes and titers of hepatitis C virus for predicting response to interferon in patients with chronic hepatitis C.

  Kunihiko Hino;Shigehiko Sainokami;Kazumi Shimoda;Shiro Iino

  338
  Citations

• A synthetic peptide vaccine involving the product of the pre-S(2) region of hepatitis B virus DNA: protective efficacy in chimpanzees

  Yukio Itoh;Emiko Takai;Hitoshi Ohnuma;Kohji Kitajima

  319
  Citations

• Point mutation in the S gene of hepatitis B virus for a d/y or w/r subtypic change in two blood donors carrying a surface antigen of compound subtype adyr or adwr.

  H Okamoto;M Imai;F Tsuda;T Tanaka

  314
  Citations

• Hepatitis C virus variants from Vietnam are classifiable into the seventh, eighth, and ninth major genetic groups.

  Hajime Tokita;Hiroaki Okamoto;Fumio Tsuda;Pham Song

  286
  Citations