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The construction of design for personalized dosing for immunosuppressants using pharmacometrics

Research Project

Project/Area Number 21K06711
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 47060:Clinical pharmacy-related
Research InstitutionKobe University (2022-2023)
Kyoto University (2021)

Principal Investigator

Itohara Kotaro  神戸大学, 医学部附属病院, 特命助教 (00870445)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords母集団解析 / タクロリムス / エベロリムス / 臓器移植 / イトラコナゾール / 相互作用 / 肝移植 / 肺移植 / ファーマコメトリクス / 薬物動態 / 免疫抑制剤
Outline of Research at the Start

免疫抑制剤は臓器移植患者の拒絶反応の抑制に広く用いられているが、その薬物動態は個人差が大きく、患者個別の投与量調節が必要とされている。今回、母集団薬物動態モデルおよび生理学的薬物動態モデルを応用し、臓器移植患者において薬物濃度の個人差を及ぼす原因の探索および小児のような特殊な集団における薬物動態の違いの検討を行う。その結果を用いて、各免疫抑制剤の最適投与法の構築をすることを目的とする。

Outline of Final Research Achievements

Population pharmacokinetic models of immunosuppressant drugs were developed using routinely obtained blood concentration data. In the analysis of everolimus for liver transplant patients, covariates affecting clearance of everolimus were extracted and the appropriate initial dose was determined. The model was also shown to be applicable to children over 2 years of age. The analysis of tacrolimus in lung transplant patients revealed some of the factors that contribute to the initial variability of tacrolimus dosing. In addition, it was showed that the pharmacokinetics of tacrolimus in combination with itraconazole can be better predicted by taking into account the blood concentration of itraconazole.

Academic Significance and Societal Importance of the Research Achievements

臓器移植後は拒絶反応の抑制のために免疫抑制剤が使用される。免疫抑制剤は薬物血中濃度のばらつきが大きく、安全で有効な治療を行うには適切な投与設計法を構築することが重要である。本研究は、肝移植患者におけるエベロリムスや肺移植患者におけるタクロリムスの薬物動態を予測する新規のモデルを構築したものである。これらのモデルにより、免疫抑制剤の薬物動態に影響する因子を明らかとし、個別化投与設計に活かすことができることを示したことに、本研究の学術的・社会的意義がある。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (11 results)

All 2024 2023 2022 2021

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 2 results) Presentation (7 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Population pharmacokinetics of everolimus in renal transplant recipients receiving long-term multiple immunosuppressive therapy2024

    • Author(s)
      Sakaue Tomoyuki、Yamamoto Kazuhiro、Itohara Kotaro、Kitahiro Yumi、Endo Takahito、Yokoyama Naoki、Ishimura Takeshi、Omura Tomohiro、Yano Ikuko
    • Journal Title

      Drug Metabolism and Pharmacokinetics

      Volume: 56 Pages: 101009-101009

    • DOI

      10.1016/j.dmpk.2024.101009

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A model-based pharmacokinetic assessment of drug-drug interaction between tacrolimus and nirmatrelvir/ritonavir in a kidney transplant patient with COVID-192023

    • Author(s)
      Tomida Takeshi、Itohara Kotaro、Yamamoto Kazuhiro、Kimura Takeshi、Fujita Kohei、Uda Atsushi、Kitahiro Yumi、Yokoyama Naoki、Hyodo Yoji、Omura Tomohiro、Yano Ikuko
    • Journal Title

      Drug Metabolism and Pharmacokinetics

      Volume: 53 Pages: 100529-100529

    • DOI

      10.1016/j.dmpk.2023.100529

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Population pharmacokinetics of everolimus in adult liver transplant patients: Comparison to tacrolimus disposition and extrapolation to pediatrics2022

    • Author(s)
      Kotaro Itohara, Ikuko Yano, Shunsaku Nakagawa, Mitsuhiro Sugimoto, Machiko Hirai, Atsushi Yonezawa, Satoshi Imai, Takayuki Nakagawa, Daiki Hira, Takashi Ito, Koichiro Hata, Etsuro Hatano, Tomohiro Terada, Kazuo Matsubara
    • Journal Title

      Clinical and Translational Science

      Volume: 15 Issue: 11 Pages: 2652-2662

    • DOI

      10.1111/cts.13389

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Association between time in therapeutic range of tacrolimus blood concentration and acute rejection within the first three months after lung transplantation2022

    • Author(s)
      Yoshiki Katada, Shunsaku Nakagawa, Kotaro Itohara, Takuya Suzuki, Ryota Kato, Hiroki Endo, Mitsuhiro Sugimoto, Atsushi Yonezawa, Takayuki Nakagawa, Akihiro Ohsumi, Daisuke Nakajima, Hiroshi Date, Tomohiro Terada
    • Journal Title

      Journal of Pharmaceutical Health Care and Sciences

      Volume: 8 Issue: 1 Pages: 25-25

    • DOI

      10.1186/s40780-022-00256-9

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] A model-based pharmacokinetic analysis of drug-drug interaction between nirmatrelvir/ritonavir and tacrolimus2023

    • Author(s)
      Itohara K, Tomida T, Yamamoto K, Kimura T, Fujita K, Uda A, Kitahiro Y, Yokoyama N, Hyodo Y, Omura T, Yano I
    • Organizer
      The 21st International Congress of Therapeutic Drug Monitoring & Clinical Toxicology (IATDMCT 2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 肺移植患者におけるイトラコナゾール併用に着目したタクロリムスの母集団薬物動態解析2023

    • Author(s)
      高橋連,糸原光太郎,中川俊作,片田佳希,杉本充弘,梅村圭祐,松村勝之、今吉菜月,勝部友里恵,平大樹,今井哲司,米澤淳,中川貴之,田中里奈,大角明宏,中島大輔,長尾美紀,伊達洋至,寺田智祐
    • Organizer
      第39回日本TDM学会・学術大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] ニルマトレルビル/リトナビル併用時にタクロリムス濃度の異常高値を認めた腎移植症例2023

    • Author(s)
      冨田猛,木村丈司,山本和宏,宇田篤史,藤田浩平,荻原孝史,糸原光太郎,北廣優実,大村友博,矢野育子
    • Organizer
      第25回日本医薬品情報学会総会・学術大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Population pharmacokinetic analysis and dosing optimization of tacrolimus in lung transplant recipients with itraconazole2023

    • Author(s)
      Takahashi R, Itohara K, Nakagawa S, Katada Y, Sugimoto M, Umemura K, Matsumura K, Shigetsura Y, Imayoshi N, Katsube Y, Hira D, Tsuda M, Imai S, Yonezawa A, Nakagawa T, Tanaka S, Ohsumi A, Nakajima D, Nagao M, Date H, Terada T
    • Organizer
      第33回日本医療薬学会年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 生理学的薬物動態モデルを活用したタクロリムスの薬物動態予測2023

    • Author(s)
      糸原光太郎
    • Organizer
      第44回日本臨床薬理学会総会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 成人肝移植患者におけるエベロリムスの母集団薬物動態解析と小児肝移植患者への外挿2022

    • Author(s)
      糸原光太郎、矢野育子、中川俊作、杉本充弘、平井真智子、米澤淳、平大樹、伊藤孝司、秦浩一郎、波多野悦朗、寺田智祐、松原和夫
    • Organizer
      第43回日本臨床薬理学会学術総会
    • Related Report
      2022 Research-status Report
  • [Presentation] 生理学的薬物速度論モデルを用いたタクロリムスとエベロリムスの体内動態変動因子に関する検討2021

    • Author(s)
      山口紗緒里, 中川俊作, 糸原光太郎, 杉本充弘, 梶原望渡, 田上裕美, 米澤 淳, 今井哲司, 中川貴之, 松原和夫, 穴澤貴行, 秦 浩一郎, 田浦康二朗, 寺田智祐
    • Organizer
      医療薬学フォーラム2021/ 第29回クリニカルファーマシーシンポジウム
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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