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Nuclear receptor PXR-mediated hepatocyte proliferation: understanding of its mechanism and human relevance

Research Project

Project/Area Number 17K08418
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Medical pharmacy
Research InstitutionUniversity of Shizuoka

Principal Investigator

Yoshinari Kouichi  静岡県立大学, 薬学部, 教授 (60343399)

Co-Investigator(Kenkyū-buntansha) 佐々木 崇光  静岡県立大学, 薬学部, 客員共同研究員 (20382674)
保坂 卓臣  静岡県立大学, 薬学部, 助教 (30611579)
志津 怜太  静岡県立大学, 薬学部, 助教 (50803912)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords肝毒性 / 肝細胞増殖 / 化学発がん / 肝がん / 核内受容体 / 医薬品副作用 / 抗炎症 / 分子間相互作用 / PXR / CAR / 転写調節 / 肝臓 / 細胞増殖 / 化学物質 / 肝 / 肝細胞 / 肝再生 / 種差
Outline of Final Research Achievements

In this study, we investigated the influences of PXR activation on the chemical-induced hepatocarcinogenesis and the association of PXR with inflammatory signals by using in vivo and in vitro experiments. Mammalian two-hybrid assays showed that PXR did not interact with YAP, a key transcriptional co-factor of hepatocyte proliferation. In a mouse hepatocyte model, the knock-down of YAP did not affect PXR-mediated enhancement of mouse hepatocyte proliferation. In a mouse carcinogenesis model with diethylnitrosamine as an initiator, the CAR activator phenobarbital induced liver tumors (adenoma and/or carcinoma) but the murine PXR activator PCN did not. Interestingly, cotreatment with PCN reduced the size and multiplicity of the phenobarbital-induced liver tumors. Using in vitro reporter gene assays and in vivo liver injury model mice, PXR activation was suggested to suppress the functions of NF-κB and AP-1, which are key inflammation-related transcription factors.

Academic Significance and Societal Importance of the Research Achievements

核内受容体PXRは人々が日常的に摂取する医薬品や食品成分など多種多様な化学物質により活性化される。我々のこれまでの研究成果から、PXRの活性化は、肝障害からの回復を促進する一方で化学物質による肝発がんの感受性を増強する可能性が考えられた。そこで本研究ではこれらの可能性を検討した。その結果、既知の肝化学発がんモデルにおいて、PXRの活性化自体は肝がんを惹起せず、むしろ肝がんの悪性化を抑制する可能性が示された。また、PXRは炎症関連転写因子の機能を抑制することが示唆された。今後、分子機序やヒト外挿性を明らかにする必要はあるが、本研究成果より、PXR活性化物質は抗腫瘍効果を有する可能性が示された。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (26 results)

All 2020 2019 2018 2017

All Journal Article (6 results) (of which Peer Reviewed: 5 results,  Open Access: 1 results) Presentation (20 results) (of which Int'l Joint Research: 7 results,  Invited: 8 results)

  • [Journal Article] Nuclear receptor CAR-mediated liver cancer and its species differences2020

    • Author(s)
      Shizu Ryota、Yoshinari Kouichi
    • Journal Title

      Expert Opinion on Drug Metabolism & Toxicology

      Volume: 16 Issue: 4 Pages: 343-351

    • DOI

      10.1080/17425255.2020.1746268

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Role of Nuclear Receptors PXR and CAR in Xenobiotic-Induced Hepatocyte Proliferation and Chemical Carcinogenesis2019

    • Author(s)
      Yoshinari Kouichi
    • Journal Title

      Biological and Pharmaceutical Bulletin

      Volume: 42 Issue: 8 Pages: 1243-1252

    • DOI

      10.1248/bpb.b19-00267

    • NAID

      130007686697

    • ISSN
      0918-6158, 1347-5215
    • Year and Date
      2019-08-01
    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Functional interaction between PXR and YAP in xenobiotic-dependent liver hypertrophy and drug metabolism.2019

    • Author(s)
      Abe, T., Shizu, R., Sasaki, T., Shimizu, Y., Hosaka, T., Kodama, S., Matsuzawa, A., Yoshinari, K.
    • Journal Title

      J. Pharmacol. Exp. Ther.

      Volume: 371 Issue: 3 Pages: 590-601

    • DOI

      10.1124/jpet.119.258632

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Possible involvement of the competition for the transcriptional coactivator glucocorticoid receptor-interacting protein 1 in the inflammatory signal-dependent suppression of PXR-mediated CYP3A induction in?vitro2019

    • Author(s)
      Okamura Maya、Shizu Ryota、Hosaka Takuomi、Sasaki Takamitsu、Yoshinari Kouichi
    • Journal Title

      Drug Metabolism and Pharmacokinetics

      Volume: 34 Issue: 4 Pages: 272-279

    • DOI

      10.1016/j.dmpk.2019.04.005

    • NAID

      50014558515

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Screening of Industrial and Agricultural Chemicals for Searching a Mouse PXR Activator Using Cell-Based Reporter Gene Assays2018

    • Author(s)
      Ryota Shizu, Makoto Kano, Taiki Abe, Saki Tsuchiya, Yuki Shimizu, Michiko Watanabe, Takuomi Hosaka, Takamitsu Sasaki, Kouichi Yoshinari
    • Journal Title

      BPB Reports

      Volume: 1 Pages: 11-19

    • NAID

      130007938427

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Acceleration of murine hepatocyte proliferation by imazalil through the activation of nuclear receptor PXR2018

    • Author(s)
      Shohei Yoshimaru, Ryota Shizu, Satoshi Tsuruta, Yuto Amaike, Makoto Kano, Takuomi Hosaka, Takamitsu Sasak, Kouichi Yoshinari
    • Journal Title

      J Toxicol Sci

      Volume: 印刷中

    • NAID

      50014469406

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] CYP3A4誘導:分子機序の理解と創薬における予測2019

    • Author(s)
      吉成浩一
    • Organizer
      医療薬学フォーラム2019・第27回クリニカルファーマシーシンポジウム
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] 化学物質応答性核内受容体 CAR を介した肝発がん2019

    • Author(s)
      吉成浩一
    • Organizer
      静岡大学グリーン科学技術研究所シンポジウム
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] 毒性発現機序を考慮したインビトロ試験による化学物質の肝毒性予測2019

    • Author(s)
      吉成浩一
    • Organizer
      日本動物実験代替法学会第32回大会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] The role of YAP in CAR dependent hepatocyte proliferation2019

    • Author(s)
      Ryota Shizu, Kouichi Yoshinari
    • Organizer
      フォーラム2019衛生薬学・環境トキシコロジー
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Interaction between CAR and YAP is a possible underlying mechanism of phenobarbital-dependent hepatocarcinogenesis and its species difference2019

    • Author(s)
      Ryota Shizu, Taiki Abe, Keichiro Sobe, Mai Ishimura, Yuto Amaike, Takuomi Hosaka, Takamitsu Sasaki, Kouichi Yoshinari
    • Organizer
      Cold Spring Harbor Asia meeting on Liver, Biology, Diseases & Cancer
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Interaction with YAP is a possible underlying mechanism for CAR-dependent hepatocarcinogenesis2019

    • Author(s)
      Ryota Shizu, Taiki Abe, Keiichiro Sobe, Mai Ishimura, Takuomi Hosaka, Takamitsu Sasakim Kouichi Yoshinari
    • Organizer
      The 12th International Meeting of the International Society for the Study of Xenobiotics
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] マウスにおける核内受容体PXR活性化薬長期間投与の肝発がんへの影響2019

    • Author(s)
      石村麻衣、志津怜太、吉成浩一
    • Organizer
      令和元年度内外環境応答・代謝酵素研究会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 核内受容体CARはPPARα依存的な脂質代謝調節を抑制する2019

    • Author(s)
      志津怜太、江崎加奈子、吉成浩一
    • Organizer
      令和元年度内外環境応答・代謝酵素研究会
    • Related Report
      2019 Annual Research Report
  • [Presentation] フェノバルビタールによる肝発がんへのPXR活性化の影響2019

    • Author(s)
      石村麻衣、志津怜太、曽部圭一郎、江崎香奈子、保坂卓臣、佐々木崇光、吉成浩一
    • Organizer
      フォーラム2019衛生薬学・環境トキシコロジー
    • Related Report
      2019 Annual Research Report
  • [Presentation] Hepatocyte proliferation mediated by nuclear receptor CAR and PXR.2018

    • Author(s)
      Kouichi Yoshinari
    • Organizer
      2018 International Meeting on 22nd Microsomal Drug Oxidation and 33rd Japanese Society for the Study of Xenobiotics.
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Imazalil activates the nuclear receptor PXR to accelerate CAR-mediated hepatocyte proliferation in mice.2018

    • Author(s)
      Shohei Yoshimaru, Ryota Shizu, Satoshi Tsuruta, Yuto Amaike, Makoto Kano, Takuomi Hosaka, Takamitsu Sasaki, Kouichi Yoshinari
    • Organizer
      The 8th international congress of Asian Society of Toxicology (ASIATOX)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Acceleration of murine hepatocyte proliferation by imazaril through the activation of nuclear receptor PXR2018

    • Author(s)
      Shohei Yoshimaru, Ryota Shizu, Satoshi Tsuruta, Yuto Amaike, Makoto Kano, Takuomi Hosaka, Takamitsu Sasaki, Kouichi Yoshinari
    • Organizer
      The 22nd North American Meeting of the International Society for the Study of Xenobiotics
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] A possible involvement of transcriptional coactivators in the inflammation-dependent downregulation of PXR-mediated CYP3A induction.2018

    • Author(s)
      Maya Okamura, Ryota Shizu, Takuomi Hosaka, Takamitsu Sasaki, Kouichi Yoshinari
    • Organizer
      2018 International Meeting on 22nd Microsomal Drug Oxidation and 33rd Japanese Society for the Study of Xenobiotics
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 遺伝子発現調節機構の解明を基盤とした薬物代謝及び安全性研究2018

    • Author(s)
      吉成浩一
    • Organizer
      日本薬学会第138年会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 核内受容体CARおよびPXRによる肝細胞増殖調節におけるYAPの関与2018

    • Author(s)
      石村麻衣、天池優斗、阿部太紀、志津怜太、保坂卓臣、佐々木崇光、吉成浩一
    • Organizer
      日本薬学会第138年会
    • Related Report
      2017 Research-status Report
  • [Presentation] Influence of food additives on nuclear receptor PXR2017

    • Author(s)
      吉丸祥平、志津怜太、保坂卓臣、佐々木崇光、吉成浩一
    • Organizer
      第22回静岡健康・長寿学術フォーラム
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 核内受容体CAR依存的な肝細胞増殖へのYAPの関与2017

    • Author(s)
      天池優斗、阿部太紀、志津怜太、保坂卓臣、佐々木崇光、松沢 厚、吉成浩一
    • Organizer
      フォーラム2017衛生薬学・環境トキシコロジー
    • Related Report
      2017 Research-status Report
  • [Presentation] 異物応答性核内受容体による肝細胞増殖制御2017

    • Author(s)
      吉成浩一
    • Organizer
      フォーラム2017衛生薬学・環境トキシコロジー
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 薬物代謝及び核内受容体研究を基盤とした化学物質の肝毒性発現機序解明と評価予測系開発2017

    • Author(s)
      吉成浩一
    • Organizer
      2017年日化協LRI研究報告会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 核内受容体CARを介した肝細胞増殖のインビトロ評価系の構築と機序解析2017

    • Author(s)
      吉成浩一、阿部太紀、天池優斗、志津怜太、保坂卓臣、佐々木崇光
    • Organizer
      第24回肝細胞研究会
    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2021-02-19  

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