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Comprehensive analysis of HBV genes in pediatric HBV carriers

Research Project

Project/Area Number 16K10070
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Pediatrics
Research InstitutionNagoya City University

Principal Investigator

Ito Koichi  名古屋市立大学, 大学院医学研究科, 助教 (00444977)

Co-Investigator(Kenkyū-buntansha) 齋藤 伸治  名古屋市立大学, 大学院医学研究科, 教授 (00281824)
杉浦 時雄  名古屋市立大学, 大学院医学研究科, 研究員 (10381881)
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: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords小児 / B型肝炎 / 遺伝子変異 / エスケープ変異 / B型肝炎ウイルス / 遺伝子 / 母子感染 / HBV / ワクチン / ワクチンエスケープ変異 / B型慢性肝炎 / B型肝炎
Outline of Final Research Achievements

HBV gene analysis was performed on pediatric HBV carriers with confirmed HBe Seroconversion (SC). Mutation of the precore region (G1896A) was observed in 2 of 8 cases (25%). No mutation was found in the core promoter region. All patients became asymptomatic carriers after SC. In addition, HBV gene analysis was performed in one family (3 cases: mother, sister, younger brother) suspected to be infected within the family by the HBs antibody escape mutant. In all three cases, G145R and P120Q mutations were found in the HBV gene, and it was confirmed that this was an infection with the HBs antibody escape mutant.

Academic Significance and Societal Importance of the Research Achievements

少数での解析であるが、小児のHBVキャリアにおいてはコア領域、コアプロモータ領域の変異の頻度は、成人より少ない。成人と小児におけるこの差はホストの免疫状態の違いによると考えられた。日本国内において、HBs抗体エスケープ変異株による家族内感染の存在がされた。HBs抗体エスケープ変異株は通常の母子感染予防処置プロトコールでは感染予防・診断が困難と考えられ、その対策が必要である。

Report

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

    (20 results)

All 2018 2017 2016

All Journal Article (8 results) (of which Peer Reviewed: 6 results) Presentation (12 results) (of which Int'l Joint Research: 5 results)

  • [Journal Article] 【産婦人科医が身につけたい新生児の診察法】 母児感染2018

    • Author(s)
      伊藤孝一
    • Journal Title

      周産期医学

      Volume: 48 Pages: 991-994

    • Related Report
      2018 Annual Research Report
  • [Journal Article] Antiviral therapy for hepatitis B virus during second pregnancies2018

    • Author(s)
      Wakano Y, Sugiura T, Endo T, Ito K, Suzuki M, Tajiri H, Tanaka Y, Saitoh S.
    • Journal Title

      J Obstet Gynaecol Res

      Volume: 44 Issue: 3 Pages: 566-569

    • DOI

      10.1111/jog.13540

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Effects of 4-phenylbutyrate therapy in a preterm infant with cholestasis and liver fibrosis2016

    • Author(s)
      Ito S, Hayashi H, Sugiura T, Ito K, Ueda H, Togawa T, Endo T, Tanikawa K, Kage M, Kusuhara H, Saitoh S.
    • Journal Title

      Pediatr Int.

      Volume: Feb 4 Issue: 6 Pages: 506-509

    • DOI

      10.1111/ped.12839

    • Related Report
      2016 Research-status Report
    • Peer Reviewed
  • [Journal Article] Single nucleotide polymorphisms in AGTR1, TFAP2B, and TRAF1 are not associated with the incidence of patent ductus arteriosus in Japanese preterm infants.2016

    • Author(s)
      Kawase K, Sugiura T, Nagaya Y, Yamada T, Sugimoto M, Ito K, Togawa T, Nagasaki R, Kato T, Kouwaki M, Koyama N, Saitoh S.
    • Journal Title

      Pediatr Int.

      Volume: Nov 30 Issue: 6 Pages: 461-466

    • DOI

      10.1111/ped.12861

    • Related Report
      2016 Research-status Report
    • Peer Reviewed
  • [Journal Article] Molecular Genetic Dissection and Neonatal/Infantile Intrahepatic Cholestasis Using Targeted Next-Generation Sequencing2016

    • Author(s)
      Togawa T, Sugiura T, Ito K, Endo T, Aoyama K, Ohashi K, Negishi Y, Kudo T, Ito R, Kikuchi A, Arai-Ichinoi N, Kure S, Saitoh S.
    • Journal Title

      J Pediatr.

      Volume: 171 Pages: 171-177

    • DOI

      10.1016/j.jpeds.2016.01.006

    • Related Report
      2016 Research-status Report
    • Peer Reviewed
  • [Journal Article] B型肝炎ウイルス母子感染予防の新方式は周知されているか?2016

    • Author(s)
      河嵜 翔太, 杉浦 時雄, 遠藤 剛, 伊藤 孝一, 加藤 丈典, 齋藤 伸治
    • Journal Title

      日本周産期・新生児医学会雑誌

      Volume: 52 Pages: 874-878

    • Related Report
      2016 Research-status Report
    • Peer Reviewed
  • [Journal Article] 高ウイルス量妊婦へのテノホビル投与によるB型肝炎ウイルス母子感染予防2016

    • Author(s)
      大江 雅美子, 杉浦 時雄, 遠藤 剛, 伊藤 孝一, 齋藤 伸治
    • Journal Title

      日本周産期・新生児医学会雑誌

      Volume: 52 Pages: 165-168

    • Related Report
      2016 Research-status Report
    • Peer Reviewed
  • [Journal Article] 【周産期医学必修知識第8版】 新生児編 高直接ビリルビン血症2016

    • Author(s)
      伊藤 孝一
    • Journal Title

      周産期医学

      Volume: 46巻増刊 Pages: 728-731

    • Related Report
      2016 Research-status Report
  • [Presentation] 先天性心疾患児における生後早期の胆汁うっ滞2018

    • Author(s)
      伊藤孝一
    • Organizer
      第121回日本小児科学会学術集会
    • Related Report
      2018 Annual Research Report
  • [Presentation] DIRECT HYPERBILIRUBINEMIA SHORTLY AFTER BIRTH IS ASSOCIATED WITH CONGENITAL HEART DISEASE2018

    • Author(s)
      Koichi Ito
    • Organizer
      North American Society for Pediatric Gastroenterology, Hepatology and Nutrition 2018
    • Related Report
      2018 Annual Research Report
  • [Presentation] 2歳で診断された HBs抗体エスケープ変異株によるHBV母子感染の一例2018

    • Author(s)
      太田隆徳, 伊藤孝一
    • Organizer
      第35回 日本小児肝臓研究会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 高ウイルス量妊婦への核酸アナログ投与によるB型肝炎ウイルス母子感染予防2018

    • Author(s)
      杉浦時雄、伊藤孝一、齋藤伸治、田中靖人、他
    • Organizer
      第272回日本小児科学会東海地方会
    • Related Report
      2017 Research-status Report
  • [Presentation] ANTIVIRAL THERAPY DURING PREGNANCY SUCCESSFULLY PREVENTED MOTHER-TO-CHILD TRANSMISSION OF HEPATITIS B VIRUS INFECTION2017

    • Author(s)
      T. Sugiura,K. Ito, S. Saitoh,et al.
    • Organizer
      North American Society for Pediatric Gastroenterology, Hepatology and Nutrition Annual Meeting
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] OCCULT HEPATITIS B VIRUS INFECTION IN CHILDREN BORN TO HEPATITIS B VIRUS MOTHERS AFTER PASSIVE-ACTIVE IMMUNOPROPHYLAXIS IN JAPAN2017

    • Author(s)
      Shogo Ito, Koichi Ito, Takeshi Endo, Tokio Sugiura, Yasuhito Tanaka, Shinji Saitoh.
    • Organizer
      North American Society for Pediatric Gastroenterology, Hepatology and Nutrition Annual Meeting
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Bilateral hypoplasia of the internal carotid artery in two Japanese patients with Alagille syndrome2016

    • Author(s)
      Koichi Ito, Shigeru Honda, Takeshi Endo, Takao Togawa, Tokio Sugiura, Shinji Saitoh
    • Organizer
      The 5th World Congress of Pediatric Gastroenterology, Hepatology and Nutrition
    • Place of Presentation
      Montreal, Canada
    • Year and Date
      2016-10-05
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Implementation of a new protocol to prevent mother-to-child transmission of hepatitis B virus infection in Japan2016

    • Author(s)
      Tokio Sugiura, Shota Kawasaki, Takeshi Endo, Koichi Ito, Takenori Kato, Shinji Saitoh
    • Organizer
      The 5th World Congress of Pediatric Gastroenterology, Hepatology and Nutrition
    • Place of Presentation
      Montreal, Canada
    • Year and Date
      2016-10-05
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Successful pegylated interferon therapy for chronic hepatitis B in 5-year-old child patient2016

    • Author(s)
      Shota Kawasaki, Koichi Ito, Takeshi Endo, Tokio Sugiura, Yoshishige Miyake, Shinji Saitoh
    • Organizer
      The 5th World Congress of Pediatric Gastroenterology, Hepatology and Nutrition
    • Place of Presentation
      Montreal, Canada
    • Year and Date
      2016-10-05
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] 高ウイルス量妊婦への核酸アナログ投与によるB型肝炎ウイルス母子感染予防2016

    • Author(s)
      若野 泰宏, 杉浦 時雄, 遠藤 剛, 伊藤 孝一, 齋藤 伸治, 田中 靖人, 高野 智子, 田尻 仁, 鈴木 光幸
    • Organizer
      第43回日本小児栄養消化器肝臓学会
    • Place of Presentation
      つくば国際会議場(茨城県・つくば市)
    • Year and Date
      2016-09-16
    • Related Report
      2016 Research-status Report
  • [Presentation] B型肝炎ウイルス母子感染予防の新方式は周知されているか?2016

    • Author(s)
      河崎 翔太, 杉浦 時雄, 遠藤 剛, 伊藤 孝一, 加藤 丈典, 齋藤 伸治
    • Organizer
      第43回日本小児栄養消化器肝臓学会
    • Place of Presentation
      つくば国際会議場(茨城県・つくば市)
    • Year and Date
      2016-09-16
    • Related Report
      2016 Research-status Report
  • [Presentation] ペグインターフェロン治療中にHBe抗原セロコンバージョンが得られたB型慢性肝炎5歳例2016

    • Author(s)
      伊藤 孝一, 遠藤 剛, 戸川 貴夫, 杉浦 時雄, 三宅 能成, 斎藤 伸治
    • Organizer
      第119回日本小児科学会学術集会
    • Place of Presentation
      ロイトン札幌(北海道・札幌市)
    • Year and Date
      2016-05-13
    • Related Report
      2016 Research-status Report

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

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