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Analysis of vertical transmission of herpes simplex virus.

Research Project

Project/Area Number 19K07597
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 49060:Virology-related
Research InstitutionSenri Kinran University

Principal Investigator

Shiraki Kimiyasu  千里金蘭大学, 看護学部, 教授 (50135745)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords単純ヘルペスウイルス / 母子感染 / 細胞トロピズム / 温度感受性 / 遺伝子変異 / 病原性
Outline of Research at the Start

本研究は、HSVの垂直感染にトロピズムが感染に関与するという研究である。2組の母子感染のウイルスのペアを得たことによって、母と児のウイルスの違うという現象を見出し、垂直感染の母子のウイルスのトロピズムを明らかにする。HSV-2が垂直感染するために、母のウイルスと変異して性状変化を起こし、その変化したウイルス集団が選択され、母のウイルスの約5%のみが垂直感染に関与する。すなわち、これまで知られていなかった「ウイルス感染のために、一部のウイルスに酵素遺伝子に変異を起こして、性状変化を起こし、児の細胞・体内での増殖能を得て、新生児に垂直感染する」という新しい感染成立機構の概念が確立できる。

Outline of Final Research Achievements

Herpes simplex virus (HSV) mother-to-child transmission is only 5% even in the presence of HSV in vulva at birth. We obtained two sets of mother's genital genital and neonatal isolates, confirmed the UL13 gene mutation in the mother strain and the infant strain, and had a common difference in cell tropism and temperature sensitivity. UL13 mutations were found in 4 of the 5 strains within 8 days of birth, and no UL13 mutations were found in 12 of the 14 strains thereafter and 27 mothers' genital isolates. Wild-type and mutant UL13 proteins were expressed in HepG2 cells, and proteome analysis identified an elongation factor 1 delta alone as the target protein. As described above, the involvement of UL13 in the mother-to-child transmission of HSV was clarified.

Academic Significance and Societal Importance of the Research Achievements

単純ヘルペスウイルス(HSV)母子感染は新生児の致命的感染症になるため、帝王切開によりそのリスクは回避されている。本研究では、出産時に母体外陰部にウイルスが存在しても、容易に感染しないで、UL13に変異があるウイルスが選択された場合にだけ、母子感染が成立していることを明らかにした。そして、そのUL13は、細胞のトロピズムと温度感受性にかかわり、外陰部の温度と新生児の体温が外陰部株と新生児株と相関しており、生物学的特性と合致する事、および、そのUL13がelongation factor 1 δを標的としていることも明らかにした。

Report

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

    (6 results)

All 2022 2021

All Journal Article (6 results) (of which Peer Reviewed: 6 results,  Open Access: 3 results)

  • [Journal Article] Derivation of optimal strategy based on past antiviral and favipiravir experiences.2022

    • Author(s)
      Shiraki K, Sato N, Sakai K, Matsumoto S, Kaszynski RH, Takemoto M.
    • Journal Title

      Pharmacology & Therapeutics

      Volume: 235 Pages: 108121-108121

    • DOI

      10.1016/j.pharmthera.2022.108121

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effect of universal varicella vaccination and behavioral changes against coronavirus disease 2019 pandemic on the incidence of herpes zoster.2021

    • Author(s)
      Shiraki K, Toyama N, Tanaka K, Ito A, Yamamoto J
    • Journal Title

      J Dermatol Sci.

      Volume: 104 Issue: 3 Pages: 185-192

    • DOI

      10.1016/j.jdermsci.2021.10.007

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Successful treatment with famciclovir for varicella zoster virus infection resistant to acyclovir.2021

    • Author(s)
      Oka T, Hishizawa M, Yamashita K, Shiraki K, Takaori-Kondo A.
    • Journal Title

      J Infect Chemother

      Volume: 27 Issue: 5 Pages: 755-758

    • DOI

      10.1016/j.jiac.2020.12.013

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Emergence of varicella-zoster virus resistance to acyclovir: epidemiology, prevention, and treatment.2021

    • Author(s)
      Shiraki K, Takemoto M, Daikoku T.
    • Journal Title

      Expert Rev Anti Infect Ther.

      Volume: 19 Issue: 11 Pages: 1415-1425

    • DOI

      10.1080/14787210.2021.1917992

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Improvement of acyclovir-resistant herpes zoster infection by amenamevir.2021

    • Author(s)
      Onaka T, Shiraki K, Yonezawa A.
    • Journal Title

      J Dermatol.

      Volume: 48 Issue: 9

    • DOI

      10.1111/1346-8138.16027

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Amenamevir, a Helicase-Primase Inhibitor, for the Optimal Treatment of Herpes Zoster.2021

    • Author(s)
      Shiraki K, Yasumoto S, Toyama N, Fukuda H.
    • Journal Title

      Viruses

      Volume: 13 Issue: 8 Pages: 1547-1547

    • DOI

      10.3390/v13081547

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access

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Published: 2019-04-18   Modified: 2023-01-30  

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