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Trend and molecular biological analysis of hepatitis B virus genotype distribution

Research Project

Project/Area Number 16K09380
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Gastroenterology
Research InstitutionAichi Medical University

Principal Investigator

Ito Kiyoaki  愛知医科大学, 医学部, 教授 (50551420)

Co-Investigator(Kenkyū-buntansha) 溝上 雅史  国立研究開発法人国立国際医療研究センター, その他部局等, ゲノム医科学プロジェクト長 (40166038)
Research Collaborator Sakamoto Kazumasa  
Inoue Rieko  
Suzuki Sayuri  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
KeywordsB型肝炎ウイルス / 遺伝子型 / ワクチン / 急性肝炎 / 慢性肝炎 / ジェノタイプ / B型肝炎 / エンベロープ / 系統解析 / 分子生物学的検討 / 遺伝子変異 / 糖鎖 / 分子生物学
Outline of Final Research Achievements

In this study, we conducted a national survey of the distribution of hepatitis B virus (HBV) genotype in 2016, five years after the previous survey, to clarify the trend of HBV genotype distribution in acute and chronic hepatitis B virus infection in Japan. We have collected clinical information on 127 cases of acute hepatitis B and 4,350 cases of chronic hepatitis B.
As a result of the final tabulation, there are 61 cases (48.0%) of genotype A in acute hepatitis B, and 177 cases (4.1%) of genotype A in chronic hepatitis B. The proportion of genotype A in acute hepatitis B and chronic hepatitis was almost unchanged since the proportion of genotype A was 47% in acute hepatitis and 4.1% in chronic hepatitis in 2011.

Academic Significance and Societal Importance of the Research Achievements

本研究において、前回調査から5年が経過した2016年度にB型肝炎の全国調査を行うことにより、B型急性および慢性肝炎における遺伝子型分布の変遷を明らかにした。心配されたB型慢性肝炎における遺伝子型Aのさらなる感染の拡大に関しては否定的であった。これは、成人感染のB型急性肝炎の遷延例を慢性肝炎に含めていた可能性や母子感染や幼児期の感染と比較して核酸アナログ製剤によりHBs抗原の消失を認めやすいといった要因が関連しているものと考察された。B型肝炎ワクチンの定期接種が開始された今、今後の遺伝子型の分布や懸念されるワクチンエスケープ変異の増加の有無に関して全国的に調査を続ける必要があると考えられた。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (9 results)

All 2018 2017 2016

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (6 results) (of which Int'l Joint Research: 4 results) Book (1 results)

  • [Journal Article] Virological and Clinical Characteristics of Hepatitis B Virus Genotype A2018

    • Author(s)
      Ito Kiyoaki、Yoneda Masashi、Sakamoto Kazumasa、Mizokami Masashi
    • Journal Title

      Journal of Gastroenterology

      Volume: 53 Issue: 1 Pages: 18-26

    • DOI

      10.1007/s00535-017-1367-5

    • Related Report
      2018 Annual Research Report 2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Serum WFA-M2BP levels predict liver fibrosis, development of hepatocellular carcinoma, and overall survival: A meta-analysis2017

    • Author(s)
      Ito K, Murotani K, Nakade Y, Inoue T, Nakao H, Sumida Y, Kamada Y, Yoneda M
    • Journal Title

      J Gastroenterol Hepatol

      Volume: -

    • Related Report
      2016 Research-status Report
    • Peer Reviewed
  • [Presentation] Investigation of viral factors associated with the development of de novo hepatitis B virus infection by deep sequencing2017

    • Author(s)
      Sakamoto K, Ito K, Umemura T, Okumura A, Tanaka E, Yoneda M
    • Organizer
      2017 International Meeting on Molecular Biology of Hepatitis B Viruses
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Geographic Distribution and Characteristics of Genotype A Hepatitis B Virus Infection in Acute and Chronic Hepatitis B Patients in Japan2017

    • Author(s)
      Ito K, Yotsuyanagi H, Sugiyama M, Yatsuhashi H, Karino Y, Takikawa Y, Kurosaki M, Umemura T, Toyoda H, Yoneda M, Tanaka Y, Mita E, Michitaka K, Maeshiro T
    • Organizer
      2017 International Meeting on Molecular Biology of Hepatitis B Viruses
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Deep sequencingによるde novo B型肝炎発症に関連するウイルス側因子の解析2017

    • Author(s)
      伊藤清顕、梅村武司、田中榮司
    • Organizer
      第25回日本消化器関連学会週間, シンポジウム, 福岡, 2017年10月
    • Related Report
      2017 Research-status Report
  • [Presentation] Development of Novel Anti-viral Agents against Hepatitis B Virus by using an siRNA Screening Panel Targeting the Carbohydrate Synthesis System.2016

    • Author(s)
      Ito K, Yoneda M, Angata K, Watashi K, Wakita T, Iijima S, Tanaka Y, Tong S, Mizokami M, Narimatsu H
    • Organizer
      APDW 2016
    • Place of Presentation
      神戸
    • Year and Date
      2016-11-02
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Development of Novel Anti-viral Agents against Hepatitis B Virus by using an siRNA Screening Panel Targeting the Carbohydrate Synthesis System.2016

    • Author(s)
      Ito K, Yoneda M, Angata K, Watashi K, Wakita T, Iijima S, Tanaka Y, Tong S, Mizokami M, Narimatsu H
    • Organizer
      2016 International Meeting on Molecular Biology of Hepatitis B Viruses
    • Place of Presentation
      Seoul, Korea
    • Year and Date
      2016-09-21
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] 糖鎖機能を標的としたB型肝炎ウイルス排除に向けた取り組み2016

    • Author(s)
      伊藤清顕、米田政志
    • Organizer
      第102回日本消化器病学会総会
    • Place of Presentation
      東京
    • Year and Date
      2016-04-21
    • Related Report
      2016 Research-status Report
  • [Book] 肝線維化評価テキスト2017

    • Author(s)
      伊藤清顕他
    • Total Pages
      5
    • Publisher
      文光堂
    • ISBN
      9784830621000
    • Related Report
      2017 Research-status Report

URL: 

Published: 2016-04-21   Modified: 2020-03-30  

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