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Elucidation of the characteristics of genetic changes in hepatitis B and C viruses and their relationship with clinical conditions

Research Project

Project/Area Number 21K07980
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 53010:Gastroenterology-related
Research InstitutionKobe University

Principal Investigator

Ueda Yoshihide  神戸大学, 医学研究科, 特命教授 (90378662)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
KeywordsC型肝炎ウイルス / B型肝炎ウイルス / 遺伝子変異 / 遺伝子構造変化
Outline of Research at the Start

本研究の目的は、C型肝炎ウイルス(HCV)ならびにB型肝炎ウイルス(HBV)の感染患者体内で生じている遺伝子変異バイアスを明らかにするとともに、遺伝子構造変化も含めた遺伝子変化と病態との関連を解明することである。本研究では、HCVならびにHBV感染患者の病態の変化に応じて経時的に採取した血清検体を用い、1分子リアルタイム・シーケンサーにてウイルス遺伝子解析を行う。各ウイルスの遺伝子変異バイアスを同定し、そのバイアスとは異なる変異を中心に各病態に関連する遺伝子変化を明らかにする。さらに、同定された遺伝子変化の意義をin vitro研究にて解明する。

Outline of Final Research Achievements

We identified HCV genome sequences in the serum of patients with chronic hepatitis C and recurrent hepatitis C after liver transplantation before and after anti-HCV treatment, using a single-molecule real-time sequencer and next-generation sequencer. We conducted a molecular phylogenetic tree analysis of changes in HCV gene sequences and found that transition mutations occur frequently as a characteristic of HCV gene mutation bias, and that A→G and U→C mutations are particularly frequent. On the other hand, known drug resistance mutations were also caused by transversion mutations.
As a result of similar analysis of the HBV gene sequences of chronic hepatitis B patients, structural changes in HBV including deletions in the HBV preS/S region and C region were found in many cases, and the relationship with clinical course was clarified.

Academic Significance and Societal Importance of the Research Achievements

本研究では、C型ならびにB型肝炎ウイルスの感染患者体内で生じている遺伝子変異バイアスを明らかにし、遺伝子構造変化も含めた遺伝子変化と病態との関連を解明した。これらの遺伝子配列の変化が臨床経過と関連していることから、臨床像の予測や個々の症例に最適な治療法の検討へと繋がることが期待できる。また、近年問題となった新型コロナウイルス感染症(COVID-19)のように、社会的に問題となり早急な対策が必要となる新規ウイルス感染症の遺伝子変異の解析にも応用できる解析手法を確立したため、様々なウイルスの遺伝子変化と病態との関係を解明する研究法として今後の学術的な発展が期待できる。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (5 results)

All 2023 2022

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (1 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results) Book (2 results)

  • [Journal Article] Evolutional transition of HBV genome during the persistent infection determined by single-molecule real-time sequencing2023

    • Author(s)
      Arasawa Soichi、Takeda Haruhiko、Takai Atsushi、Iguchi Eriko、Eso Yuji、Shimizu Takahiro、Takahashi Ken、Yamashita Taiki、Ueda Yoshihide、Marusawa Hiroyuki、Seno Hiroshi
    • Journal Title

      Hepatology Communications

      Volume: 7 Issue: 3 Pages: e0047-e0047

    • DOI

      10.1097/hc9.0000000000000047

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Mutational spectrum of hepatitis C virus in patients with chronic hepatitis C determined by single molecule real-time sequencing2022

    • Author(s)
      Nakamura Fumiyasu、Takeda Haruhiko、Ueda Yoshihide、Takai Atsushi、Takahashi Ken、Eso Yuji、Arasawa Soichi、Iguchi Eriko、Shimizu Takahiro、Mishima Masako、Kumagai Ken、Yamashita Taiki、Uemoto Shinji、Kato Nobuyuki、Marusawa Hiroyuki、Sekine Akihiro、Seno Hiroshi
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1 Pages: 7083-7083

    • DOI

      10.1038/s41598-022-11151-6

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Current State of the Art in Liver Transplantation in the Japan. Management of Post-Transplant HBV and HCV2023

    • Author(s)
      Yoshihide Ueda
    • Organizer
      AASLD. The Liver Meeting
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Book] ウイルス性肝炎学2023―最新の病態・診断・治療情報-2023

    • Author(s)
      上田 佳秀
    • Total Pages
      6
    • Publisher
      株式会社 日本臨床
    • Related Report
      2023 Annual Research Report
  • [Book] 必携 内科医のための 臓器移植診療ハンドブック2023

    • Author(s)
      一般財団法人日本移植学会Transplant Physician委員会
    • Total Pages
      266
    • Publisher
      ぱーそん書房
    • ISBN
      9784907095796
    • Related Report
      2022 Research-status Report

URL: 

Published: 2021-04-28   Modified: 2025-01-30  

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