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Regulation of nuclear receptor through autophagy-related proteins and other mechanisms

Research Project

Project/Area Number 19K22643
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 54:Internal medicine of the bio-information integration and related fields
Research InstitutionTeikyo University

Principal Investigator

Shibata Shigeru  帝京大学, 医学部, 教授 (60508068)

Co-Investigator(Kenkyū-buntansha) 岡崎 具樹  帝京大学, 医学部, 教授 (60203973)
藤垣 嘉秀  帝京大学, 医学部, 教授 (20283351)
石澤 健一  帝京大学, 医学部, 講師 (10772684)
諏佐 崇生  帝京大学, 医学部, 助教 (20445852)
Project Period (FY) 2019-06-28 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Keywordsミネラルコルチコイド受容体 / pendrin / 食塩感受性 / ビタミンD受容体 / 翻訳後修飾 / ステロイド受容体 / リガンド / 局所制御
Outline of Research at the Start

核内受容体はリガンド依存性転写因子であり、リガンドと核内受容体との結合はシグナル活性化の分子スイッチとみなすことができる。申請者らはこれまでの研究で、ステロイド受容体であるミネラロコルチコイド受容体(MR)の新たな調節機構として、リガンド結合領域のリン酸化がリガンド結合能を制御するという新たなメカニズムを報告した。また、キナーゼ・ライブラリーを用いたスクリーニングアッセイにて、ULKがMRのリン酸化を担う可能性を明らかにしている。本研究では、MRリン酸化の意義および制御メカニズムについて詳細に解析し、核内受容体調節における意義を解明することを目指す。

Outline of Final Research Achievements

MR modulates the activity of transporters and channels in the kidney, regulating fluid homeostasis. We previously reported that pendrin, a Cl/HCO3 exchanger, plays a key role in determining the balance between salt reabsorption and potassium excretion, and also showed that dephosphorylation of MR at the ligand-binding domain by the inactivation of ULK1 through AngII signaling increases pendrin, maximizing salt reabsorption. Using extracellular vesicles (EVs) isolated from urine, we determined the clinical significance of primary aldosteronism (PA), a major form of secondary hypertension. Pendrin in urinary EVs was highly correlated with renal expression, and its abundance was significantly attenuated by therapeutic interventions in PA. As a mechanism that regulates vitamin D receptor (VDR), another nuclear receptor highly present in the renal distal nephron, we showed that 25D3 can stimulate VDR target genes, uncovering an alternative regulation of VDR signaling in renal tubules.

Academic Significance and Societal Importance of the Research Achievements

ミネラルコルチコイド受容体(MR)は腎臓において食塩の再吸収とカリウム排泄のバランスを調節しており、体液のイオン組成や食事の変化に対応して尿細管の働きを柔軟に変化させている。これまでの基礎的・臨床的検討から、Cl/HOC3交換輸送体pendrinの変化がMRの電解質調節作用のスイッチングに関わるキーイベントの一つであることが示されており、食生活習慣と健康の密接な関わり、なかでも食塩による血圧上昇 (食塩感受性高血圧) やカリウム摂取による心血管保護作用の分子基盤が明らかとなってきている。またMRと同様に腎尿細管に高発現するビタミンD受容体の活性化機構について新知見が得られている。

Report

(3 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • Research Products

    (11 results)

All 2021 2020 2019

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (7 results) (of which Int'l Joint Research: 4 results,  Invited: 1 results)

  • [Journal Article] Role of the ubiquitin proteasome system in the regulation of blood pressure: A review2020

    • Author(s)
      Yamazaki Osamu、Hirohama Daigoro、Ishizawa Kenichi、Shibata Shigeru
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 21 Issue: 15 Pages: 1

    • DOI

      10.3390/ijms21155358

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 25(OH)D<sub>3</sub> stimulates the expression of vitamin D target genes in renal tubular cells when Cyp27b1 is abrogated2020

    • Author(s)
      Kikuyama T, Susa T, Tamamori-Adachi M, Iizuka M, Akimoto M, Okinaga H, Fujigaki Y, Uchida S, Shibata S, Okazaki T.
    • Journal Title

      J Steroid Biochem Mol Biol .

      Volume: 199 Pages: 105593-105593

    • DOI

      10.1016/j.jsbmb.2020.105593

    • Related Report
      2020 Annual Research Report 2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Upregulation of renal Na–K–2Cl cotransporter 2 in obese diabetes mellitus via a vasopressin receptor 2-dependent pathway2020

    • Author(s)
      Sakai Kazuhiro、Yamazaki Osamu、Ishizawa Kenichi、Tamura Yoshifuru、Wang Qin、Ueno Masaki、Hayama Yuto、Fujigaki Yoshihide、Shibata Shigeru
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 524 Issue: 3 Pages: 710

    • DOI

      10.1016/j.bbrc.2020.01.142

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Cardio-renal protective effect of the xanthine oxidase inhibitor febuxostat in the 5/6 nephrectomy model with hyperuricemia2020

    • Author(s)
      Hiroki Omizo, Yoshifuru Tamura, Chikayuki Morimoto, Masaki Ueno, Yuto Hayama, Emiko Kuribayashi-Okuma, Shunya Uchida, and Shigeru Shibata
    • Journal Title

      Scientific Reports

      Volume: -

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 原発性アルドステロン症におけるCl/HCO3輸送体pendrinの検討2021

    • Author(s)
      落合文佳、栗林恵美子、石澤健一、浅川信一郎、広浜大五郎、奈倉倫人、新井繁幸、山崎 修、田村好古、藤垣嘉秀、柴田 茂
    • Organizer
      日本腎臓学会総会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Pre- and post-treatment analysis of pendrin in the urinary exosome in primary aldosteronism2020

    • Author(s)
      Fumika Ochiai, Emiko Kuribayashi-Okuma, Kenichi Ishizawa, Yuya Tsurutani, Tetsuo Nishikawa, Shigeru Shibata
    • Organizer
      AHA Hypertension
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] MR拮抗薬と高血圧関連疾患2020

    • Author(s)
      柴田 茂
    • Organizer
      2020年日本腎臓学会学術総会
    • Related Report
      2019 Research-status Report
  • [Presentation] 25(OH)D3 alone stimulates expression of 1,25(OH)2D3-responsive genes, Calbindin-D9K and Megalin, in mpkDCT cells where Cyp27b1 gene was deleted by CRISPR-Cas92019

    • Author(s)
      Takahiro Kikuyama, Takao Susa, Mimi Tamamori-Adachi, Masayoshi Iizuka, Shunya Uchida, Tomoki Okazaki, Shigeru Shibata
    • Organizer
      American Society of Nephrology Kidney Week 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Role of vasopressin V2 receptor signaling in NKCC2 regulation in diabetes mellitus・American Society of Nephrology Kidney Week 20192019

    • Author(s)
      Kazuhiro Sakai, Osamu Yamazaki, Kenichi Ishizawa, Yoshikazu Nemoto, Shinichiro Asakawa, Michito Nagura, Shigeyuki Arai, Yoshifuru Tamura, Yoshihide Fujigaki, Shigeru Shibata
    • Organizer
      American Society of Nephrology Kidney Week 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Disturbed phosphate metabolism facilitates kidney damage in Dahl salt-sensitive hypertensive rats2019

    • Author(s)
      Qin Wang, Kenichi Ishizawa, Yoshikazu Nemoto, Yutaka Miura, Jinping Li, Makoto Kuro-o, Shigeru Shibata
    • Organizer
      American Society of Nephrology Kidney Week 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 尿細管の機能を統合的に理解する ~基礎から最新の知見まで~2019

    • Author(s)
      柴田 茂
    • Organizer
      2019年日本腎臓学会学術総会
    • Related Report
      2019 Research-status Report
    • Invited

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Published: 2019-07-04   Modified: 2022-01-27  

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