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2017 Fiscal Year Annual Research Report

Mathematical foundations and applications in dissipative models arising in life science

Research Project

Project/Area Number 26287025
Research InstitutionRyukoku University

Principal Investigator

森田 善久  龍谷大学, 理工学部, 教授 (10192783)

Co-Investigator(Kenkyū-buntansha) 坂元 国望  広島大学, 理学研究科, 教授 (40243547)
村川 秀樹  九州大学, 数理学研究院, 助教 (40432116)
四ツ谷 晶二  龍谷大学, 理工学部, 教授 (60128361)
神保 秀一  北海道大学, 理学研究院, 教授 (80201565)
岩見 真吾  九州大学, 理学研究院, 准教授 (90518119)
Project Period (FY) 2014-04-01 – 2018-03-31
Keywords反応拡散系 / 非線形境界条件 / 安定性解析 / パターン形成 / 感染症モデル / 分岐構造 / 細胞極性モデル
Outline of Annual Research Achievements

1)研究代表者の森田は、細胞質と細胞膜の間で物質のやりとりを想定して、細胞質内に相当する領域で2種の物質が拡散、細胞膜に相当する境界ではこれらの物質間の交換が行なわれるモデル方程式を研究した。研究分担者の坂元と定常解の安定性と具体的な例について分岐が起こる条件を導くことに成功した。
2)四ツ谷は、質量保存の反応拡散方程式の定常問題で、未知関数の定積分を非線形項に含む1次元 Allen-Cahn 方程式で表される場合について研究をおこなった。定数解から1次分岐分岐した点対称解からさらに2次分岐し、2次分岐以降の分岐曲線のつながり具合と、拡散係数が零に近づけたときにどのような収束をするのかという問題に対する数学的な解答を、共同研究者と与えた。
3)村川は、細胞接着モデルの数値計算に関連する非線形拡散問題に対する数値解法の研究をおこなった。実装が容易で、高速で精度の良い数値解を得ることができる線形数値解法を提案し、数値実験によって計算効率は既存の解法と比べて100倍程度良いことが確かめられた。また、線形解法の誤差解析を行い、最適な誤差評価を得た。
4)岩見は、共同研究者と生命現象の実験および臨床データを定量的に解析するための数理モデルを構築した。特に、PDEで記述された数理モデルを用いたデータ解析では、パラメータ推定の際、計算時間が相当なものになる。数学的に同値な変形を行う事で、飛躍的に計算時間を短縮する数理モデルを導出する方法を提案した。

Research Progress Status

29年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

29年度が最終年度であるため、記入しない。

Causes of Carryover

29年度が最終年度であるため、記入しない。

Expenditure Plan for Carryover Budget

29年度が最終年度であるため、記入しない。

  • Research Products

    (39 results)

All 2018 2017 Other

All Int'l Joint Research (2 results) Journal Article (19 results) (of which Int'l Joint Research: 9 results,  Peer Reviewed: 19 results,  Open Access: 6 results) Presentation (18 results) (of which Int'l Joint Research: 15 results,  Invited: 18 results)

  • [Int'l Joint Research] Paris-Sud University(France)

    • Country Name
      France
    • Counterpart Institution
      Paris-Sud University
  • [Int'l Joint Research] National Central University(Taiwan)

    • Country Name
      その他の国・地域
    • Counterpart Institution
      National Central University
  • [Journal Article] Stability and Spectral Comparison of a Reaction-Diffusion System with Mass Conservation2018

    • Author(s)
      E. Latos Evangelos, Y. Morita, T. Suzuki
    • Journal Title

      J. Dynam. Differential Equations

      Volume: 印刷中 Pages: 印刷中

    • DOI

      10.1007/s10884-018-9650-6

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] A diffusion model for cell polarization with interactions on the membrane2018

    • Author(s)
      Y. Morita, K. Sakamoto
    • Journal Title

      Japan J. Indust. Appl. Math.

      Volume: 35 Pages: 261~276

    • DOI

      doi.org/10.1007/s13160-017-0290-8

    • Peer Reviewed
  • [Journal Article] Asymptotic behavior of equilibrium states of reaction-diffusion systems with mass conservation2018

    • Author(s)
      J.-L. Chern, Y. Morita, T.-T. Shieh
    • Journal Title

      J. Differential Equations

      Volume: 264 Pages: 550~574

    • DOI

      10.1016/j.jde.2017.09.015

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] An efficient linear scheme to approximate nonlinear diffusion problems2018

    • Author(s)
      H. Murakawa
    • Journal Title

      Jpn. J. Ind. Appl. Math.

      Volume: 35 Pages: 71-101

    • DOI

      10.1007/s13160-017-0279-3

    • Peer Reviewed
  • [Journal Article] A PDE multiscale model of hepatitis C virus infection can be transformed to a system of ODEs2018

    • Author(s)
      K. Kitagawa, S. Nakaoka, Y. Asai, K.Watashi, S. Iwami
    • Journal Title

      Journal of Theoretical Biology

      Volume: 448 Pages: 80~85

    • DOI

      10.1016/j.jtbi.2018.04.006

    • Peer Reviewed / Open Access
  • [Journal Article] Sporadic on/off switching of HTLV-1 Tax expression is crucial to maintain the whole population of virus-induced leukemic cells2018

    • Author(s)
      M. Mahgoub, J. Yasunaga, S. Iwami, S. Nakaoka, Y. Koizumi, K. Shimura, M. Matsuoka
    • Journal Title

      Proceedings of the National Academy of Sciences

      Volume: 115 Pages: E1269~E1278

    • DOI

      10.1073/pnas.1715724115

    • Peer Reviewed
  • [Journal Article] Human-Specific Adaptations in Vpu Conferring Anti-tetherin Activity Are Critical for Efficient Early HIV-1 Replication In?Vivo2018

    • Author(s)
      E. Yamada, S. Nakaoka, L. Klein, E. Reith, S. Langer, K. Hopfensperger, S. Iwami, G. Schreiber, F. Kirchhoff, Y. Koyanagi, D. Sauter, K. Sato
    • Journal Title

      Cell Host & Microbe

      Volume: 23 Pages: 110~120.e7

    • DOI

      10.1016/j.chom.2017.12.009

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Nonlocal eigenvalue problems arising in a generalized phase-field-type system2017

    • Author(s)
      S. Jimbo, Y. Morita
    • Journal Title

      Japan J. Indust. Appl. Math.

      Volume: 34 Pages: 555~584

    • DOI

      10.1007/s13160-017-0254-z

    • Peer Reviewed
  • [Journal Article] An efficient linear numerical scheme for the Stefan problem, the porous medium equation and nonlinear cross-diffusion systems2017

    • Author(s)
      M. Molati, H. Murakawa
    • Journal Title

      Proceedings of Equadiff 2017 Conference

      Volume: 1 Pages: 305-314

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Carbon-nanotube geometries as optimal configurations2017

    • Author(s)
      E. Mainini,H. Murakawa,P. Piovano, U. Stefanelli
    • Journal Title

      Multiscale Modeling and Simulation: A SIAM Interdisciplinary Journal

      Volume: 15 Pages: 1448-1471

    • DOI

      10.1137/16M1087862

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Immovable,moving and vanishing interfaces in fast reaction limit2017

    • Author(s)
      M. Iida,H. Monobe,H. Murakawa, H. Ninomiya
    • Journal Title

      J. Differential Equations

      Volume: 263(5) Pages: 2715-2735

    • DOI

      10.1016/j.jde.2017.04.009

    • Peer Reviewed
  • [Journal Article] A linear finite volume method for nonlinear cross-diffusion systems2017

    • Author(s)
      H. Murakawa
    • Journal Title

      Numer. Math.

      Volume: 136 Pages: 1-26

    • DOI

      10.1007/s00211-016-0832-z

    • Peer Reviewed
  • [Journal Article] Number of infection events per cell during HIV-1 cell-free infection2017

    • Author(s)
      Y. Ito, A. Remion, A. Tauzin, K. Ejima, S. Nakaoka, Y. Iwasa, S. Iwami, F. Mammano
    • Journal Title

      Scientific Reports

      Volume: 7 Pages: 6559~6559

    • DOI

      10.1038/s41598-017-03954-9

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Reply to Padmanabhan and Dixit: Hepatitis C virus entry inhibitors for optimally boosting direct-acting antiviral-based treatments2017

    • Author(s)
      H. Ohashi, Y. Koizumi, K. Fukano, T. Wakita, A.S. Perelson, S. Iwami, K. Watashi
    • Journal Title

      Proceedings of the National Academy of Sciences

      Volume: 114 Pages: E4527~E4529

    • DOI

      10.1073/pnas.1705234114

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] HIV-1 competition experiments in humanized mice show that APOBEC3H imposes selective pressure and promotes virus adaptation2017

    • Author(s)
      Y. Nakano, N. Misawa, G. Juarez-Fernandez, M. Moriwaki, S. Nakaoka, T. Funo, E. Yamada, A. Soper, R. Yoshikawa, D. Ebrahimi, Y. Tachiki, S. Iwami, R.S. Harris, Y. Koyanagi, K. Sato
    • Journal Title

      PLOS Pathogens

      Volume: 13 Pages: e1006348~348

    • DOI

      10.1371/journal.ppat.1006348

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A highly pathogenic simian/human immunodeficiency virus effectively produces infectious virions compared with a less pathogenic virus in cell culture2017

    • Author(s)
      S. Iwanami, Y. Kakizoe, S. Morita, T. Miura, S. Nakaoka, S. Iwami
    • Journal Title

      Theoretical Biology and Medical Modelling

      Volume: 14 Pages: 9~9

    • DOI

      10.1186/s12976-017-0055-8

    • Peer Reviewed / Open Access
  • [Journal Article] A heart-brain-kidney network controls adaptation to cardiac stress through tissue macrophage activation2017

    • Author(s)
      K. Fujiu, M. Shibata, Y. Nakayama, F. Ogata, S. Matsumoto, K. Noshita, S. Iwami, S. Nakae, I. Komuro,R. Nagai, I. Manabe
    • Journal Title

      Nature Medicine

      Volume: 23 Pages: 611~622

    • DOI

      10.1038/nm.4326

    • Peer Reviewed
  • [Journal Article] Secondary bifurcation for a nonlocal Allen?Cahn equation2017

    • Author(s)
      K. Kuto, T. Mori, T. Tsujikawa, S. Yotsutani
    • Journal Title

      Journal of Differential Equations

      Volume: 263 Pages: 2687~2714

    • DOI

      10.1016/j.jde.2017.04.010

    • Peer Reviewed
  • [Journal Article] A Note on the Uniqueness and Structure of Solutions to the Dirichlet Problem for Some Elliptic Systems2017

    • Author(s)
      J.-L. Chern, S. Yotsutani, N. Kawano
    • Journal Title

      Proceedings of EQUADIFF 2017 Conference

      Volume: - Pages: 283-286

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Turing-type instability of diffusion equations with mass transport through the boundary2018

    • Author(s)
      Y. Morita
    • Organizer
      The Third International Conference on the Dynamics and Differential Equations: Fundamentals and Developments
    • Int'l Joint Research / Invited
  • [Presentation] Entire solutions to a reaction-diffusion equation in multiple semi-infinite intervals with a junction2018

    • Author(s)
      Y. Morita
    • Organizer
      International Conference on Nonlinear Analysis and its Applications
    • Int'l Joint Research / Invited
  • [Presentation] Y-shaped graph and time entire solutions of a semilinear parabolic equation2018

    • Author(s)
      S. Jimbo
    • Organizer
      Differential Equations and Networks
    • Int'l Joint Research / Invited
  • [Presentation] Eigenvalue problem of the Laplacian in a domain with a thin tubular hole2018

    • Author(s)
      S. Jimbo
    • Organizer
      The Third International Conference on the Dynamics and Differential Equations: Fundamentals and Developments-In Memory of Professor Jack K. Hale-
    • Int'l Joint Research / Invited
  • [Presentation] 細胞間接着の数理モデル2018

    • Author(s)
      村川秀樹
    • Organizer
      自己組織化研究会
    • Invited
  • [Presentation] Modeling virus infection in cell culture2018

    • Author(s)
      S. Iwami
    • Organizer
      Simons Semester on Mathematical Biology in Warsaw, Epi-workshop
    • Int'l Joint Research / Invited
  • [Presentation] Dynamical law of weakly interacting fronts in the FitzHugh-Nagumo system2017

    • Author(s)
      Y. Morita
    • Organizer
      International Workshop on Nonlinear Analysis and Reaction-Diffusion Equations
    • Int'l Joint Research / Invited
  • [Presentation] Weakly interacting fronts and standing waves in the FitzHugh-Nagumo system2017

    • Author(s)
      Y. Morita
    • Organizer
      Equadiff2017
    • Int'l Joint Research / Invited
  • [Presentation] Localized patterns in a reaction-diffusion system with mass conservation2017

    • Author(s)
      Y. Morita
    • Organizer
      Equadiff2017
    • Int'l Joint Research / Invited
  • [Presentation] Fast reaction limit : classification and analysis2017

    • Author(s)
      H. Murakawa
    • Organizer
      ReaDiNet 2017: International Conference on Mathematical Biology
    • Int'l Joint Research / Invited
  • [Presentation] Modeling of cell-cell adhesion and its application2017

    • Author(s)
      H. Murakawa
    • Organizer
      Reaction-Diffusion Systems and Mathematical Modelling in Biology
    • Int'l Joint Research / Invited
  • [Presentation] Classification and analysis of fast reaction limit problems2017

    • Author(s)
      H. Murakawa
    • Organizer
      Ito Workshop on Partial Differential Equations
    • Int'l Joint Research / Invited
  • [Presentation] An efficient linear scheme for the Stefan problem,the porous medium equation and nonlinear cross-diffusion systems2017

    • Author(s)
      H. Murakawa
    • Organizer
      Equadiff2017
    • Int'l Joint Research / Invited
  • [Presentation] Numerical analysis for nonlinear diffusion problems2017

    • Author(s)
      村川秀樹
    • Organizer
      RIMS共同研究 数値解析学の最前線 - 理論・方法・応用 -
    • Invited
  • [Presentation] 急速反応極限問題の分類と解析2017

    • Author(s)
      村川秀樹
    • Organizer
      RIMS共同研究 非線形現象と反応拡散方程式
    • Invited
  • [Presentation] Quantification of virus infection in cell culture2017

    • Author(s)
      S. Iwami
    • Organizer
      A3-NIMS joint workshop on mathematical biology
    • Int'l Joint Research / Invited
  • [Presentation] Quantifying antiviral activity optimizes drug combinations against HCV infection2017

    • Author(s)
      S. Iwami
    • Organizer
      The 18th RIES-HOKUDAI international symposium
    • Int'l Joint Research / Invited
  • [Presentation] HCV entry inhibitors for optimally boosting direct-acting antiviral-based treatments2017

    • Author(s)
      S. Iwami
    • Organizer
      Innovative Mathematical Modeling for the Analysis of Infectious Disease Data
    • Int'l Joint Research / Invited

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Published: 2018-12-17   Modified: 2022-02-22  

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