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2013 Fiscal Year Annual Research Report

ウイルスー宿主攻防の数理科学解析

Planned Research

Project AreaMolecular basis of host cell competency in virus infection
Project/Area Number 24115008
Research InstitutionThe Graduate University for Advanced Studies

Principal Investigator

佐々木 顕  総合研究大学院大学, 先導科学研究科, 教授 (90211937)

Co-Investigator(Kenkyū-buntansha) 小柳 義夫  京都大学, ウイルス研究所, 教授 (80215417)
Project Period (FY) 2012-06-28 – 2017-03-31
Keywordsウイルス / 免疫 / 数理モデル / 感染過程 / 共進化
Research Abstract

・ヒトの対レトロウイルス防御タンパク質であるAPOBECK3Gと、それに対するHIVの抵抗タンパク質Vifの共進化動態がウイルス突然変異率とVif/A3G発現量の共進化サイクルをもたらすことを理論的に示した(ESMTB 2014, Gothenberg)
・季節性インフルエンザの新系統について、出現時期と流行時期が1年遅れることが期待されることを理論的に明らかにした(J Theor Biol. 239:32-38, 2013)
・新型インフルエンザなどの首都圏交通ネットワーク上での流行確率が、最初の感染者の居住地と勤務地の集団サイズでほぼ決まることなどを解明した(PLOS ONE, in press)
・エンテロウイルス71の感染細胞の半減期(Log2/a)、ウイルスのバーストサイズ(k/a、1個の感染細胞が生存する間に放出するウイルス粒子数)、基本再生産数(R0 = βkq/ar、一つの感染細胞から次に新たに感染 細胞となるその数)を表出するモデルを構築した(J Virol. 87:701-705, 2013)
・HIV-1感染ヒト化マウスのウイルス学的時系列解析より、急性感染期においては制御性T細胞(Treg)がHIV-1の主たる増殖の場となっていること、ウイルスアクセサリ蛋白質であるVprはその細胞周期G2/M期停止とアポトーシス誘導作用によりTregへの感染とその枯渇を促進する役割を担っていることがわかった(PLoS Pathog, 10.1371, 2013)
・HIVを抑制する宿主因子であるAPOBEC3GのHIV-1制御のなかでC-to-U mutationによるものは99.3%も達するが、 同じHIVを抑制する宿主因子であるAPOBEC3FのC-to-U mutation活性以 外よる抑制は30.2%もあることがそれぞれの変異体のデータを基にBliss independence解析モデルを用いた数理解析手法よりわかった(J Virol. 88:5881-5887, 2014)

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

・SIV/HIVとヒトの攻防を巡る解析は理論、および実験系の解析ともに順調に進行している。
・植物ウイルスの感染多重度の進化や、プラス鎖・マイナス鎖RNAウイルスの増殖を効果的に抑えるために、RNAiが標的とすべき鎖に関する研究などが新学術領域内の共同研究として既に始まっている。
・今後はこれらの共同研究を発展させ、成果にしていくと同時に、さらに領域内共同研究の幅を広げる必要がある。

Strategy for Future Research Activity

・ヒトとレトロウイルスの複製をめぐる攻防のプロセスと宿主域の進化について、現在とりくんでいるA3GとVifの共進化系の解析をさらに発展させると共に、ゲノムデータをもとに動的な進化の軌跡の解明に取り組む。
・レトロウイルとヒトについては他の宿主因子とウイルス因子との攻防についても理論化を進める。
・植物ウイルスにおける感染ゲノムの多重度(Multiplicity Of Infection, MOI)の進化を、「裏切り者」の除去というウイルスにとっての適応的観点から進め、進化実験系を用いた検証を行う。

  • Research Products

    (29 results)

All 2014 2013

All Journal Article (17 results) (of which Peer Reviewed: 17 results) Presentation (10 results) (of which Invited: 9 results) Book (2 results)

  • [Journal Article] Epidemic dynamics of a vector-borne disease on a village-and-city star network with commuters2014

    • Author(s)
      Emmanuel A. Mpolya, Kenta Yashima, Hisashi Ohtsuki, Akira Sasaki
    • Journal Title

      Journal of Theoretical Biology

      Volume: 343 Pages: 120-126

    • DOI

      doi:10.1016/j.jtbi.2013.11.024

    • Peer Reviewed
  • [Journal Article] Epidemic process over the commute network in a metropolitan area2014

    • Author(s)
      Kenta Yashima and Akira Sasaki
    • Journal Title

      PLOS ONE (in press)

      Volume: NA Pages: NA

    • Peer Reviewed
  • [Journal Article] Timing and propagule size of invasion determine its success by a time-varying threshold of demographic regime shift2014

    • Author(s)
      Masato Yamamichi, Takehito Yoshida, Akira Sasaki
    • Journal Title

      Ecology (in press)

      Volume: NA Pages: NA

    • Peer Reviewed
  • [Journal Article] CKIP-1 is an intrinsic negative regulator of T-cell activation through an interaction with CARMA12014

    • Author(s)
      Sakamoto T, Kobayashi M,Tada K, Shinohara M, Io K, Arai Y, Yamashita K, Shindo K, Kadowaki N, Koyanagi Y, Takaori-Kondo A
    • Journal Title

      PLoS One

      Volume: 9 Pages: e85762

    • DOI

      doi: 10.1371/journal.pone.0085762

    • Peer Reviewed
  • [Journal Article] EFdA, a Reverse Transcriptase Inhibitor, Potently Blocks HIV-1 Ex Vivo Infection of Langerhans Cells within Epithelium.2014

    • Author(s)
      Matsuzawa T, Kawamura T, Ogawa Y, Maeda K, Nakata H, Moriishi K, Koyanagi Y, Gatanaga H, Shimada S, Mitsuya H.
    • Journal Title

      J Invest Dermatol.

      Volume: 134 Pages: 1158-1161

    • DOI

      doi: 10.1038/jid.2013.467

    • Peer Reviewed
  • [Journal Article] Quantification of deaminase activity-dependent and -independent restriction of HIV-1 replication mediated by APOBEC3F and APOBEC3G through experimental-mathematical investigation.2014

    • Author(s)
      Kobayashi T, Koizumi Y, Takeuchi J, Misawa N, Kimura Y, Morita S, Aihara K, Koyanagi Y, Iwami S, Sato K
    • Journal Title

      J Virol.

      Volume: 88 Pages: 5881-5887

    • DOI

      doi: 10.1128/JVI.00062-14

    • Peer Reviewed
  • [Journal Article] Lack of Association between Intact/Deletion Polymorphisms of the APOBEC3B Gene and HIV-1 Risk2014

    • Author(s)
      Imahashi M, Izumi T, Watanabe D, Imamura J, Matsuoka K, Ode H, Masaoka T, Sato K, Kaneko N, Ichikawa S, Koyanagi Y, Takaori-Kondo A, Utsumi M, Yokomaku Y, Shirasaka T, Sugiura W, Iwatani Y, Naoe T.
    • Journal Title

      PLoS One

      Volume: 9 Pages: e92861

    • DOI

      doi: 10.1371/journal.pone.0092861

    • Peer Reviewed
  • [Journal Article] Limiting similarity, species packing, and the shape of competition kernels2013

    • Author(s)
      Olof Leimar, Akira Sasaki, Michael Doebeli, Ulf Dieckmann
    • Journal Title

      Journal of Theoretical Biology

      Volume: 339 Pages: 3-13

    • DOI

      10.1016/j.jtbi.2013.08.005

    • Peer Reviewed
  • [Journal Article] Timing of the emergence of new successful viral strains in seasonal influenza2013

    • Author(s)
      Ryosuke Omori, Akira Sasaki
    • Journal Title

      Journal of Theoretical Biology

      Volume: 329 Pages: 32-38

    • DOI

      10.1016/j.jtbi.2013.03.027

    • Peer Reviewed
  • [Journal Article] Single-gene speciation with pleiotropy: Effects of allele dominance, population size, and delayed inheritance2013

    • Author(s)
      Masato Yamamichi, Akira Sasaki
    • Journal Title

      Evolution

      Volume: 67 Pages: 2011-2023

    • DOI

      10.1111/evo.12068

    • Peer Reviewed
  • [Journal Article] Quantification of the dynamics of enterovirus 71 infection by experimental-mathematical investigation.2013

    • Author(s)
      Ebina H, Kanemura Y, Suzuki Y, Urata K, Koyanagi Y.
    • Journal Title

      J Virol

      Volume: 87:, 2013 Pages: 701-705

    • DOI

      doi: 10.1128/JVI.01453-12

    • Peer Reviewed
  • [Journal Article] Antimicrobial peptide LL-37 produced by HSV-2-infected keratinocytes enhances HIV infection of Langerhans cells2013

    • Author(s)
      Ogawa Y, Kawamura T, Matsuzawa T, Aoki R, Gee P, Yamashita A, Moriishi K, Yamasaki K, Koyanagi Y, Blauvelt A, Shimada S.
    • Journal Title

      Cell Host Microbe

      Volume: 13 Pages: 77-86

    • DOI

      doi: 10.1016/j.chom.2012.12.00

    • Peer Reviewed
  • [Journal Article] Oral administration of the CCR5 inhibitor, maraviroc, blocks HIV ex vivo infection of Langerhans cells within epithelium.2013

    • Author(s)
      Matsuzawa T, Kawamura T, Ogawa Y, Takahashi M, Aoki R, Moriishi K, Koyanagi Y, Gatanaga H, Blauvelt A, Shimada S.
    • Journal Title

      J. Invest. Dermatol.

      Volume: 133 Pages: 2803-2805

    • DOI

      doi: 10.1038/jid.2013.215

    • Peer Reviewed
  • [Journal Article] Host factor SAMHD1 restricts DNA viruses in non-dividing myeloid cells.2013

    • Author(s)
      Hollenbaugh JA, Gee P, Baker J, Daly MB, Amie S, Kasai N, Kanemura Y, Ward BM, Koyanagi Y, Kim B
    • Journal Title

      PLoS Pathog.

      Volume: 9 Pages: e1003481

    • DOI

      doi: 10.1371/journal.ppat.1003481

    • Peer Reviewed
  • [Journal Article] Harnessing the CRISPR/Cas9 system to disrupt latent HIV-1 provirus.2013

    • Author(s)
      Ebina H, Misawa N, Kanemura Y, Koyanagi Y.
    • Journal Title

      Sci. Rep.

      Volume: 3 Pages: 2510

    • DOI

      doi: 10.1038/srep02510

    • Peer Reviewed
  • [Journal Article] Functional antagonism of rhesus macaque and chimpanzee BST-2 by HIV-1 vpu is mediated by cytoplasmic domain interactions.2013

    • Author(s)
      Yoshida T, Koyanagi Y, Strebel K.
    • Journal Title

      J Virol.

      Volume: 87 Pages: 13825-13836,

    • DOI

      doi: 10.1128/JVI.02567-13

    • Peer Reviewed
  • [Journal Article] HIV-1 Vpr accelerates viral replication during acute infection by exploitation of proliferating CD4+ T cells in vivo2013

    • Author(s)
      Sato, K, Misawa N, Iwami S, Satou Y, Matsuoka M, Ishizaka Y, Ito M, Aihara K, An DS, Koyanagi Y.
    • Journal Title

      PLoS Pathog.

      Volume: 9 Pages: e1003812

    • DOI

      doi: 10.1128/JVI.07062-11

    • Peer Reviewed
  • [Presentation] Evolution of Mullerian/Batesian mimicry on a two-dimensional trait space of waring signal and unpalatability.2014

    • Author(s)
      Akira Sasaki
    • Organizer
      JSMB/SMB 2014 Osaka. Minisymposium: "Understanding mimicry -- evolutionary and developmental dynamics of signal sharing
    • Place of Presentation
      Osaka International Convention Center
    • Year and Date
      20140728-20140801
    • Invited
  • [Presentation] Theories of arms race on complex genotype-phenotype mappings2014

    • Author(s)
      Akira Sasaki
    • Organizer
      JSMB/SMB 2014 Osaka. Minisymposium: "Dynamics of experimental evolution -- arms race and self-organization
    • Place of Presentation
      Osaka International Convention Center
    • Year and Date
      20140728-20140801
    • Invited
  • [Presentation] The coevolution of human antiviral protein APOBEC3G and HIV protein Vif: A theoretical study2014

    • Author(s)
      Akira Sasaki
    • Organizer
      The 11th Conference of European Society for Mathematical and Theoretical Biology (ESMTB 2014)
    • Place of Presentation
      The European Conference Center in Gothenberg, Gothenberg, Sweden
    • Year and Date
      20140616-20140619
    • Invited
  • [Presentation] Invasion threshold and evolution in spatially heterogeneous epidemic models2014

    • Author(s)
      Akira Sasaki
    • Organizer
      Workshop "Spatial evolutionary epidemiology" (Organizers: Sébastien Lion and Sylvain Gandon)
    • Place of Presentation
      Le hameau de l'Etoile, Montpelier, France
    • Year and Date
      20140603-20140607
    • Invited
  • [Presentation] 遺伝子対遺伝子相互作用で駆動されるイネいもち病菌レース頻度変動(新潟県、1965-2004)の進化時系列解析2014

    • Author(s)
      佐々木顕・中林潤
    • Organizer
      第61回日本生態学会
    • Place of Presentation
      広島国際会議場
    • Year and Date
      20140318-20140318
  • [Presentation] HIV strategy for acceleration of viral replication in vivo and eradication approach of HIV proviral DNA2013

    • Author(s)
      Koyanagi, Y. Misawa N, Sato K, Ebina H.
    • Organizer
      Japan-Russia International Workshop
    • Place of Presentation
      Kyoto, Japa
    • Year and Date
      20131030-20131031
    • Invited
  • [Presentation] Strategy of disrupting latent form of HIV-1 proviral DNA2013

    • Author(s)
      Koyanagi, Y.
    • Organizer
      14th Kumamoto AIDS Seminar
    • Place of Presentation
      Kumamoto
    • Year and Date
      20131028-20131030
    • Invited
  • [Presentation] Projecting evolutionary trajectory of influenza A virus: Multidimensional scaling and individual based antigenic drift model2013

    • Author(s)
      Akira Sasaki
    • Organizer
      Tsukuba Global Science Week 2013: International Life Science Workshop -- Systems Biology
    • Place of Presentation
      Tsukuba International Convention Center
    • Year and Date
      20131003-20131003
    • Invited
  • [Presentation] ウイルス複製機構とその進化を数理モデルでとらえる2013

    • Author(s)
      佐々木顕
    • Organizer
      第23回日本数理生物学会シンポジウム「計算ウイルス学の新局面」
    • Place of Presentation
      静岡大学、浜松
    • Year and Date
      20130913-20130913
    • Invited
  • [Presentation] ntrinsic cellular defenses against retroviruses and DNA viruses.2013

    • Author(s)
      Koyanagi, Y.
    • Organizer
      The 12th Awaji International Forum on Infection and Immunity (AIFII 12)
    • Place of Presentation
      Awaji, Japan
    • Year and Date
      20130910-20130913
    • Invited
  • [Book] 病原体と宿主の進化.『感染症の生態学』第9章(分担執筆・印刷中)2014

    • Author(s)
      加茂将史・佐々木顕
    • Total Pages
      NA
    • Publisher
      共立出版
  • [Book] 「寄生」「寄生者」.行動学事典(分担執筆)2013

    • Author(s)
      佐々木顕
    • Total Pages
      NA
    • Publisher
      東京化学同人

URL: 

Published: 2015-05-28  

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