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2012 Fiscal Year Annual Research Report

蛋白相互作用阻害によるWNKキナーゼ阻害薬の効率的スクリーニング

Research Project

Project/Area Number 23659439
Research InstitutionTokyo Medical and Dental University

Principal Investigator

内田 信一  東京医科歯科大学, 医歯(薬)学総合研究科, 准教授 (50262184)

Keywordsリン酸化酵素 / ケミカルライブラリー / 高血圧
Research Abstract

腎臓膜輸送体分子の新たな制御法を模索するため、輸送体分子を制御する細胞内シグナル伝達分子の阻害をその方法論として掲げた。実際にはシグナル分子間の蛋白-蛋白結合を阻害する事で、シグナルカスケード全体を阻害する試みを、遺伝性の高血圧症である偽性低アルドステロン症II型の病態に関わっているWNK-OSR1/SPAK-NCCシグナル系にて行った。
まず、in vitroで蛍光相関分光法により、2分子の結合を効率よく探索する方法を確立した。実際には、オリンパス社製のFluoropoint Lightという機器を使用し、TAMRA蛍光ラベルしたWNK4由来ペプチドと、そのWNK4の部分と結合することが判明しているSPAKのCCTドメインをGST結合蛋白として用意し、両者の結合により蛍光ペプチドの分子のゆらぎが減少するという現象を利用してスクリーニング系を立ち上げた。その後、この新規スクリーニング法を用いて、WNKキナーゼとSPAKキナーゼの結合阻害物質を、東京医科歯科大学ケミカルライブラリーセンター所蔵の1万7千の化合物ライブラリーからスクリーニングを行った。その結果、再現性を持って両者の結合を阻害するシード化合物を11種同定し、その後培養細胞系にてシグナル伝達遮断を確認できたものは3種あった。うち、2種について化合物修飾により、毒性の低下、可溶性の増加、効果の増強をめざし、シード最適化を行っており、生体内でも目的とした効果が得られる化合物を探索中である。

  • Research Products

    (24 results)

All 2013 2012 Other

All Journal Article (13 results) (of which Peer Reviewed: 13 results) Presentation (10 results) (of which Invited: 2 results) Remarks (1 results)

  • [Journal Article] Characterization of AQP-2 gene mutation (R254Q) in a family with dominant nephrogenic DI..2013

    • Author(s)
      Shida Y
    • Journal Title

      Pediatr Int.

      Volume: 55 Pages: 105-107

    • DOI

      doi: 10.1111/j.1442-200X.2012.03614.x.

    • Peer Reviewed
  • [Journal Article] Impaired KLHL3-mediated ubiquitination of WNK4 causes human hypertension.2013

    • Author(s)
      Wakabayashi M
    • Journal Title

      Cell Rep.

      Volume: 3 Pages: 858-868

    • DOI

      doi: 10.1016/j.celrep.

    • Peer Reviewed
  • [Journal Article] Involvement of aquaporin-7 in the cutaneous primary immune response through modulation of antigen uptake and migration in dendritic cells.2012

    • Author(s)
      Hara-Chikuma M
    • Journal Title

      FASEB J

      Volume: 26 Pages: 211-218

    • DOI

      doi: 10.1096/fj.11-186627.

    • Peer Reviewed
  • [Journal Article] Phosphorylation of Na-Cl cotransporter by OSR1 and SPAK kinases regulates its ubiquitination.2012

    • Author(s)
      Hossain Khan MZ
    • Journal Title

      Biochem. Biophys. Res. Commun.

      Volume: 425 Pages: 456-461

    • DOI

      doi: 10.1016/j.bbrc.2012.07.124

    • Peer Reviewed
  • [Journal Article] A new role for aquaporin 7 in insulin secretion.2012

    • Author(s)
      Louchami K
    • Journal Title

      Cell Physiol. Biochem.

      Volume: 29 Pages: 65-74

    • DOI

      doi: 10.1159/000337588.

    • Peer Reviewed
  • [Journal Article] ASK3 responds to osmotic stress and regulates blood pressure by suppressing WNK1-SPAK/OSR1 signaling in the kidney.2012

    • Author(s)
      Naguro I
    • Journal Title

      Nat. Commun.

      Volume: 3 Pages: 1285

    • DOI

      doi: 10.1038/ncomms2283.

    • Peer Reviewed
  • [Journal Article] Phosphatidylinositol 3-kinase/Akt signaling pathway activates the WNK-OSR1/SPAK-NCC phosphorylation cascade in hyperinsulinemic db/db mice.2012

    • Author(s)
      Nishida H
    • Journal Title

      Hypertension

      Volume: 60 Pages: 981-990

    • DOI

      doi: 10.1161/HYPERTENSIONAHA.112.201509.

    • Peer Reviewed
  • [Journal Article] Severe hyperparathyroidism in a pre-dialysis chronic kidney disease patient treated with a very low protein diet.2012

    • Author(s)
      Ohta E
    • Journal Title

      J. Bone Miner.Metab.

      Volume: 30 Pages: 238-242

    • DOI

      doi: 10.1007/s00774-011-0320-6

    • Peer Reviewed
  • [Journal Article] Accumulation of autofluorescent storage material in brain is accelerated by ischemia in chloride channel 3 gene-deficient mice.2012

    • Author(s)
      Ohtaki H
    • Journal Title

      J. Neurosci. Res.

      Volume: 90 Pages: 2163-2172

    • DOI

      doi: 10.1002/jnr.23110

    • Peer Reviewed
  • [Journal Article] A minor role of WNK3 in regulating phosphorylation of renal NKCC2 and NCC co-transporters in vivo.2012

    • Author(s)
      Oi K
    • Journal Title

      Biol.Open.

      Volume: 1 Pages: 120-127

    • DOI

      doi: 10.1242/bio.2011048.

    • Peer Reviewed
  • [Journal Article] Effect of heterozygous deletion of WNK1 on the WNK-OSR1/ SPAK-NCC/NKCC1/NKCC2 signal cascade in the kidney and blood vessels.2012

    • Author(s)
      Susa K
    • Journal Title

      Clin. Exp. Nephrol.

      Volume: 16 Pages: 530-538

    • Peer Reviewed
  • [Journal Article] WNK-OSR1/SPAK-NCC signal cascade has circadian rhythm dependent on aldosterone.2012

    • Author(s)
      Susa K
    • Journal Title

      Biochem. Biophys. Res. Commun.

      Volume: 427 Pages: 743-747

    • DOI

      doi: 10.1016/j.bbrc.2012.09.130.

    • Peer Reviewed
  • [Journal Article] Does a β2-adrenergic receptor-WNK4-Na-Cl co-transporter signal cascade exist in the in vivo kidney?2012

    • Author(s)
      Uchida S
    • Journal Title

      Nat. Med.

      Volume: 18 Pages: 1324-1325

    • DOI

      doi: 10.1038/nm.2809.

    • Peer Reviewed
  • [Presentation] Role of WNK kinases in the blood pressure regulation.2012

    • Author(s)
      Uchida S
    • Organizer
      Taiwan Society of Nephrology 2012
    • Place of Presentation
      China Medical University
    • Year and Date
      20121208-20121209
    • Invited
  • [Presentation] Phosphorylation of Na-Cl cotransporter by OSR1 and SPAK kinases regulates its ubiquitination.2012

    • Author(s)
      Hossain Khan MZ
    • Organizer
      The 45th Annual Meeting of American Society of Nephrology
    • Place of Presentation
      San Diego Convention Center
    • Year and Date
      20121030-20121104
  • [Presentation] Impaired trafficking of polycystin-1 may be a key mechanism of cyst formation in the aquaporin-11 knockout mouse.2012

    • Author(s)
      Inoue Y
    • Organizer
      The 45th Annual Meeting of American Society of Nephrology
    • Place of Presentation
      San Diego Convention Center
    • Year and Date
      20121030-20121104
  • [Presentation] Development of sandwich enzyme linked immunosorbent assay (ELISA) for measurement of urinary total and phosphorylated Na-Clcotransporter (NCC) protein.2012

    • Author(s)
      Isobe K
    • Organizer
      The 45th Annual Meeting of American Society of Nephrology
    • Place of Presentation
      San Diego Convention Center
    • Year and Date
      20121030-20121104
  • [Presentation] Chemical library screening for direct SPAK inhibitors by a newly developed ELISA system.2012

    • Author(s)
      Kikuchi E
    • Organizer
      The 45th Annual Meeting of American Society of Nephrology
    • Place of Presentation
      San Diego Convention Center
    • Year and Date
      20121030-20121104
  • [Presentation] Generation and analysis of WT-WNK4 transgenic mice revealed the physiological role of WNK4.2012

    • Author(s)
      Mori T
    • Organizer
      The 45th Annual Meeting of American Society of Nephrology
    • Place of Presentation
      San Diego Convention Center
    • Year and Date
      20121030-20121104
  • [Presentation] Hereditary nephrogenic diabetes insipidus (NDI) in Japanese patients: Analysis of 73 families.2012

    • Author(s)
      Sasaki S
    • Organizer
      The 45th Annual Meeting of American Society of Nephrology
    • Place of Presentation
      San Diego Convention Center
    • Year and Date
      20121030-20121104
  • [Presentation] WNK4-OSR1/SPAK-NCC signal cascade has circadian rhythm dependent on aldosterone.2012

    • Author(s)
      Susa K
    • Organizer
      The 45th Annual Meeting of American Society of Nephrology
    • Place of Presentation
      San Diego Convention Center
    • Year and Date
      20121030-20121104
  • [Presentation] Dietary salt intake and angiotensin II regulates WNK-SPAK-NKCC1 phosphorylation cascade in mouse aorta.2012

    • Author(s)
      Zeniya M
    • Organizer
      The 45th Annual Meeting of American Society of Nephrology
    • Place of Presentation
      San Diego Convention Center
    • Year and Date
      20121030-20121104
  • [Presentation] Chemical library screening for drugs to correct intracellular mislocalization of R8L mutant barttin.2012

    • Author(s)
      Uchida S
    • Organizer
      2012 International Ion Channel Conference.
    • Place of Presentation
      the Shilla Hotel
    • Year and Date
      20120824-20120827
    • Invited
  • [Remarks] 東京医科歯科大学腎臓内科学ホームページ

    • URL

      http://www.tmd.ac.jp/grad/kid/kid-J.htm

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Published: 2014-07-24  

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