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2014 Fiscal Year Annual Research Report

Non-B HIV-1のEnv立体構造に影響を与える新規侵入阻害剤の開発

Research Project

Project/Area Number 24591485
Research InstitutionNational Institute of Infectious Diseases

Principal Investigator

吉村 和久  国立感染症研究所, その他部局等, その他 (60315306)

Project Period (FY) 2012-04-01 – 2015-03-31
KeywordsHIV-1 / CD4 mimic / 侵入阻害剤 / subtype non-B / gp120
Outline of Annual Research Achievements

平成24-26年度でHIV-1 Subtype Non-B株のCD4 cavityに結合し、侵入を阻害するだけでなく立体構造変化を惹起する可能性の高い低分子化合物の設計、合成を行うことを主たる目的として研究を継続して行った。これまで数多くスクリーニングしてきたNBD骨格とは違うが、Envに結合し同様に侵入阻害および構造変化を起こす化合物の候補としてベツリン酸誘導体(BA誘導体)を試し、Subtype B同様、 C及びBCの感染阻害効果が認められるBA誘導体(IC9564)を確認できた。また、CD4を形成する4つのドメインのうちgp120と結合する1つのドメインのみを用いた蛋白(mD1.22)を得た。一方で、Subtype non-BのHIV-1株を臨床サンプルから分離する試みも進行させた。申請者らは、簡便にしかも確実にR5ウイルスを分離するために、CCR5高発現T細胞株であるPM1/CCR5細胞を用いてウイルス分離を行う方法を確立している。このウイルス分離の系を用いて、現在まで60以上のsubtype B及びnon-Bの臨床分離株を樹立してきた。今回新たに複数のSubtype non-BのHIV-1臨床分離株を樹立し、広い範囲の臨床分離ウイルスパネルの構築が完成しつつある。これらのパネルウイルスを用いて、合成した新規CD4 mimic低分子化合物や蛋白に対する感受性を比較検討し、より広範囲なSubtype non-B株に反応する化合物の選定を行うことが可能となった。

  • Research Products

    (8 results)

All 2015 2014

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Acknowledgement Compliant: 1 results) Presentation (4 results) (of which Invited: 1 results)

  • [Journal Article] Passive transfer of neutralizing monoclonal antibody KD-247 reduces plasma viral load in patients chronically infected with HIV-1.2015

    • Author(s)
      Matsushita S, Yoshimura K, Ramirez K-P, Pisupati J, Jenkins J, Murakami T on behalf of the KD-1002 Study Group
    • Journal Title

      AIDS

      Volume: 29 Pages: 453-462

    • DOI

      10.1097/QAD.0000000000000570.

    • Peer Reviewed
  • [Journal Article] Complementary and synergistic activities of anti-V3, CD4bs and CD4i antibodies derived from a single individual can cover a wide range of HIV-1 strains.2015

    • Author(s)
      Ramirez K-P, Kuwata T, Maruta Y, Tanaka K, Alam M, Yoshimura K, Matsushita S.
    • Journal Title

      Virology

      Volume: 475 Pages: 187-203

    • DOI

      10.1016/j.virol.2014.11.011.

    • Peer Reviewed
  • [Journal Article] Structural basis of clade-specific HIV-1 neutralization by humanized anti-V3 monoclonal antibody KD-247.2015

    • Author(s)
      Kirby KA, Ong YT, Hachiya A, Laughlin TG, Chiang LA, Pan Y, Moran JL, Marchand B, Singh K, Gallazzi F, Quinn TP, Yoshimura K, Murakami T, Matsushita S, Sarafianos SG.
    • Journal Title

      The FASEB Journal

      Volume: 25 Pages: 70-80

    • DOI

      10.1096/fj.14-252262.

    • Peer Reviewed
  • [Journal Article] Impact of maraviroc-resistant and low-CCR5-adapted mutations induced by in vitro passage on sensitivity to anti-envelope neutralizing antibodies.2014

    • Author(s)
      Yoshimura K, Harada S, Boonchawalit S, Kawanami Y, Matsushita S.
    • Journal Title

      Journal of General Virology

      Volume: 95 Pages: 1816-1826

    • DOI

      10.1099/vir.0.062885-0.

    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] Mutations at the bottom of the Phe43 cavity are responsible for cross-resistance to NBD analogues.2015

    • Author(s)
      Shigeyoshi Harada, Yu Irahara, Samatchaya Boonchawalit, Mai Goryo, Hirokazu Tamamura, Tetsuro Matano, Shuzo Matsushita, Kazuhisa Yoshimura.
    • Organizer
      The annual Conference on Retroviruses and Opportunistic Infections (CROI) 2015
    • Place of Presentation
      Seattle (USA)
    • Year and Date
      2015-02-23 – 2015-02-26
  • [Presentation] Impact of the Drug-Escaped HIV Envelope Mutations on Susceptibility to Neutralizing Antibodies.2015

    • Author(s)
      Kazuhisa Yoshimura.
    • Organizer
      17th International Conference on Emerging Infectious Diseases (EID), AIDS Panel Meeting
    • Place of Presentation
      Taipei (Taiwan)
    • Year and Date
      2015-01-28 – 2015-01-29
    • Invited
  • [Presentation] Resistance Profile of CD4 Mimic Small Compounds (CD4MCs) and the Structure Analysis by Molecular Dynamic (MD) Simulation.2014

    • Author(s)
      Shigeyoshi Harada, Masaru Yokoyama, Samatchaya Boonchawalit, Hironori Sato, Shuzo Matsushita, Kazuhisa Yoshimura.
    • Organizer
      HIV Research For Prevention (HIVR4P) 2014
    • Place of Presentation
      Cape Town (South Africa)
    • Year and Date
      2014-10-28 – 2014-10-31
  • [Presentation] Impact of Maraviroc (MVC)-resistant mutations in C1 and C4 regions of gp120 on sensitivity to antibody-mediated neutralization.2014

    • Author(s)
      Samatchaya Boonchawalit, Shigeyoshi Harada, Shuzo Matsushita, Kazuhisa Yoshimura.
    • Organizer
      20th International AIDS Conference
    • Place of Presentation
      Melbourne (Australia)
    • Year and Date
      2014-07-20 – 2014-07-25

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Published: 2016-06-01  

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