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Renal function and chronic renal failure mechanisms based on biomechanical modeling

Research Project

Project/Area Number 20K04281
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 19010:Fluid engineering-related
Research InstitutionChiba University

Principal Investigator

Tsubota Ken-ichi  千葉大学, 大学院工学研究院, 教授 (10344045)

Co-Investigator(Kenkyū-buntansha) 菅原 路子  千葉大学, 大学院工学研究院, 准教授 (30323041)
中田 敏是  千葉大学, 大学院工学研究院, 准教授 (80793190)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywordsバイオメカニクス / レオロジー / 微小循環 / 腎臓 / 計算機シミュレーション
Outline of Research at the Start

腎臓では,血液のろ過,水分・電解質の再吸収,および尿の分泌によって老廃物が排泄される.この機構を理解することは,腎機能の理解と慢性腎臓病(CKD)の診断と治療に役立つと期待される.本研究では,血液および尿の流体力学的な振る舞いを明らかにすることで,腎機能の発揮および破綻の仕組みの一端を示す.特に,血管網・尿管網系の流れと物質輸送に着目し,連続体力学に基づくバイオメカニクスモデルの構築を通じて,力学量に応じた排泄機能の時空間的な局在化と,それに起因する腎機能の破綻の過程を明らかにする.さらに,構築したモデルの慢性腎臓病(CKD)に対する診断,予防や治療における有用性を検証する.

Outline of Final Research Achievements

Computer simulation of flow in the kidney was performed. First, a renal vascular network geometry was constructed using the vascular bifurcation style (symmetric or asymmetric) and the number of vascular branches. Blood flow calculations using this model revealed that in physiological vascular network structures, flow and pressure are spatially distributed due to asymmetric vascular bifurcations. It was also found that blood cells and blood flow in the vascular network are unevenly distributed in space due to the rotational motion patterns of blood cells and the asymmetry of the vascular branches. Such flow distribution may be related to kidney function and local lesions through the uneven distribution of mass transport and mechanical quantities.

Academic Significance and Societal Importance of the Research Achievements

血管網の非対称な構造ならびに赤血球の回転運動が腎臓内の流量や圧力の時空間的な変動に与える影響の一端を明らかにした.これは,腎臓の生理的および病的な振る舞いに対して,流れの力学が重要な役割を果たすことを示唆する結果であり,腎機能の深い理解とそれに基づくCKDの発症・進展機序の解明において,流れのバイオメカニクス研究の重要性を示すものと考えられる.本研究は,簡易で低コストな高機能診断や発病予測などの高度な医療技術の創造に繋がると期待される.

Report

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

    (12 results)

All 2022 2021 2020 Other

All Journal Article (3 results) (of which Peer Reviewed: 3 results) Presentation (8 results) (of which Int'l Joint Research: 3 results) Remarks (1 results)

  • [Journal Article] Blood cell distribution in small and large vessels: Effects of wall and rotating motion of red blood cells2022

    • Author(s)
      Tsubota, K. and Namioka, K.
    • Journal Title

      Journal of Biomechanics

      Volume: 137 Pages: 111081-111081

    • DOI

      10.1016/j.jbiomech.2022.111081

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Numerical simulation of the vascular structure dependence of blood flow in the kidney2022

    • Author(s)
      Deng, W. and Tsubota, K.
    • Journal Title

      Medical Engineering & Physics

      Volume: 104 Pages: 103809-103809

    • DOI

      10.1016/j.medengphy.2022.103809

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Elongation deformation of a red blood cell under shear flow as stretch testing2021

    • Author(s)
      Tsubota, K.
    • Journal Title

      Journal of the Mechanics and Physics of Solids

      Volume: in press Pages: 104345-104345

    • DOI

      10.1016/j.jmps.2021.104345

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] Analysis of Blood Flow in Microvascular Network with Complex Geometries2022

    • Author(s)
      Tsubota, K.
    • Organizer
      9th World Congress of Biomechanics
    • Related Report
      2022 Annual Research Report
  • [Presentation] Deformation Mechanics of a Red Blood Cell under Shear Flow2022

    • Author(s)
      Tsubota, K.
    • Organizer
      15th World Congress on Computational Mechanics & 8th Asian Pacific Congress on Computational Mechanics
    • Related Report
      2022 Annual Research Report
  • [Presentation] 赤血球の変形運動の力学モデリング2022

    • Author(s)
      坪田健一
    • Organizer
      日本機械学会第34回バイオエンジニアリング講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 赤血球の回転運動が血球分布に与える影響の計算機シミュレーション2022

    • Author(s)
      並岡和希,坪田健一
    • Organizer
      日本機械学会第33回バイオフロンティア講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 活性化した血小板とトロンビンバーストによる血栓形成の計算機シミュレーション2022

    • Author(s)
      得能渉,坪田健一
    • Organizer
      日本機械学会第33回バイオフロンティア講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] The mechanics of elongation deformation of a red blood cell under shear flow2021

    • Author(s)
      Tsubota, K.
    • Organizer
      The 11th Asian-Pacific Conference on Biomechanics
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Numerical simulation of blood cells distribution in small and large vessels2021

    • Author(s)
      Tsubota, K. and Namioka, K.
    • Organizer
      The 11th Asian-Pacific Conference on Biomechanics
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Computer simulation of effects of renal vessel structure on the blood flow2020

    • Author(s)
      Deng, W. and Tsubota, K.
    • Organizer
      The 11th International Conference on Computational Methods (ICCM2020)
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Remarks] 千葉大学・バイオメカニクス研究室

    • URL

      https://www.em.eng.chiba-u.jp/~bml/index.html

    • Related Report
      2022 Annual Research Report

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Published: 2020-04-28   Modified: 2024-01-30  

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