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Analysis of factors associated with global spread of enterovirus D68

Research Project

Project/Area Number 19K22733
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 58:Society medicine, nursing, and related fields
Research InstitutionTohoku University

Principal Investigator

Oshitani Hitoshi  東北大学, 医学系研究科, 教授 (80419994)

Project Period (FY) 2019-06-28 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2020: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2019: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
KeywordsエンテロウイルスD68 / EVD68 / フィリピン / 呼吸器感染症 / EV-D68 / 遺伝子解析 / エンテロウイルス / インフルエンザ / RSウイルス / EVーD68 / 世界的流行
Outline of Research at the Start

エンテロウイルスD68(EV-D68)は、ウイルス学的にはエンテロウイルスに分類されていながら、主に呼吸器感染を起こすウイルスである。以前は、非常にまれにしか検出されないウイルスと位置づけられていたが、2000年代後半から世界的にその報告数が急増しており、2014年には北米およびヨーロッパで、さらに2015年には日本でこれまでにない大規模な流行が起きた。本研究では、フィリピンのデータを用いてEV-D68の世界的な増加は、新しい遺伝子型であるClade Bの出現による病原性あるいは感染性の変化が原因ではないかという仮説を検証する。

Outline of Final Research Achievements

Enterovirus D68(EV-D68)caused a significant global outbreak from 2014-2015. However, the exact mechanism for such a global outbreak was unknown. We analyzed EV-D68 detected in the Philippines, including molecular analysis, antigenic analysis, and clinical severity. We found that the outbreak in 2015 was caused by clade switch from clade D to clade B. Also, some antigenic difference between clade B and clade D was observed. However, there was no difference in clinical severity between these two clades. These results suggest that the outbreak in 2015 was mainly caused by the emergence of antigenically different clade, clade B.

Academic Significance and Societal Importance of the Research Achievements

エンテロウイルスD68(EV-D68)は2014年~2015年に世界的流行を起こしたウイルスで、その際には呼吸器感染症の重症例だけではなく急性弛緩性麻痺例も世界各地で数多く報告された。なぜそのようなことが起きたかというメカニズムを解明することは、今後の新興感染症の流行の予知や予防にとって重要なものである。COVID-19の原因ウイルスであるSARS-CoV-2も変異を繰り返すことで流行が継続しているが、EV-D68も同じようなメカニズムで流行が起きている可能性を示せたことは、重要な意義があると考えられる。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (10 results)

All 2021 2020 2019 Other

All Int'l Joint Research (6 results) Journal Article (4 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 4 results,  Open Access: 3 results)

  • [Int'l Joint Research] Research Institute for Tropical Medicine(フィリピン)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] University Teaching Hospital(ザンビア)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Research Institute of Tropical Medicine(フィリピン)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] The University Teaching Hospital(ザンビア)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Research Institute of Tropical Medicine(フィリピン)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Research Institute of Tropical Medicine(フィリピン)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Complete Genome Sequences of Enterovirus D68 Clade A and D Strains in the Philippines.2021

    • Author(s)
      Okamoto M, Sakamoto M, Dapat C, Saito M, Saito-Obata M, Tamaki R, Lupisan SP, Quiambao BP, Oshitani H.
    • Journal Title

      Microbiol Resour Announc.

      Volume: 10(39) Issue: 39

    • DOI

      10.1128/mra.00709-21

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Receptor-Binding Assays of Enterovirus D68.2020

    • Author(s)
      Imamura T, Okamoto M, Oshitani H.
    • Journal Title

      Methods Mol Biol

      Volume: 2132 Pages: 629-639

    • DOI

      10.1007/978-1-0716-0430-4_54

    • ISBN
      9781071604298, 9781071604304
    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Fluctuations in Antibody Titers against Enterovirus D68 in Pediatric Sera Collected in a Community before, during, and after a Possible Outbreak.2020

    • Author(s)
      Kadji FMN, Nishimura H, Okamoto M, Sato K, Ohmiya S, Ito H, Suzuki A, Nagai Y, Oshitani H.
    • Journal Title

      Japanese Journal of Infectious Diseases

      Volume: 73(1) Pages: 55-57

    • NAID

      130007789150

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Evolutionary and Functional Diversity of the 5' Untranslated Region of Enterovirus D68: Increased Activity of the Internal Ribosome Entry Site of Viral Strains during the 2010s.2019

    • Author(s)
      Furuse Y, Chaimongkol N, Okamoto M, Oshitani H.
    • Journal Title

      Viruses

      Volume: 11(7) Issue: 7 Pages: 626-626

    • DOI

      10.3390/v11070626

    • NAID

      120006784468

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research

URL: 

Published: 2019-07-04   Modified: 2024-01-30  

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