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2012 Fiscal Year Annual Research Report

エピジェネティックな低酸素応答の解析による腎臓病の病態生理の解明

Research Project

Project/Area Number 24390213
Research Category

Grant-in-Aid for Scientific Research (B)

Research InstitutionThe University of Tokyo

Principal Investigator

南学 正臣  東京大学, 医学部附属病院, 教授 (90311620)

Co-Investigator(Kenkyū-buntansha) 稲城 玲子  東京大学, 医学部附属病院, 特任研究員 (50232509)
和田 健彦  東京大学, 医学部附属病院, 助教 (90447409)
大瀬 貴元  東京大学, 医学部附属病院, 助教 (10568447)
田中 哲洋  東京大学, 医学部附属病院, 助教 (90508079)
Project Period (FY) 2012-04-01 – 2015-03-31
Keywords低酸素 / HIF / エピジェネティクス / エピゲノム / ヒストン修飾 / 慢性腎臓病 / 腎細胞癌
Research Abstract

本研究は、従来ゲノムの観点のみから解析が行われていた低酸素応答について、エピゲノムの観点を取り入れて詳細な解析を行い、これを腎臓病学の病態生理に応用するものである。まず、培養血管内皮細胞を低酸素で刺激し、ピストン修飾蛋白の発現変動を解析し、その変動に相当するピストン修飾の変化をChIP-seqでゲノムワイドに解析し、種々の分子のhypoxia inducible factor(HIF)結合領域周辺の変化に注目して解析を進めた。なかでも低酸素状態で嫌気的解糖を助けるglucose transporter 3(SLC2A3)においては、低酸素に伴ってHIF依存性に発現が上昇するKDM3Aにより抑制性ピストン修飾の脱メチル化が起こり、更にクロモゾームの高次構造の変化が起こることにより、低酸素での発現上昇が起こることが分かった。また、この研究の過程で低酸素状態でHIFが結合する分子のうち新規HIFターゲット分子としてsperm-associated antigen 4(SPAG4)を同定した。癌細胞の生存には低酸素に対する抵抗性が重要であることが知られているが、SPAG4は通常の腎臓ではあまり発現がみられないが腎細胞癌では高発現し、SPAG4の高発現は腎細胞癌の予後と相関し、更にSPAG4は細胞質分裂の時にintercellular bridgeに局在して分裂を調節する役割を果たしていることを示した。一方、抗癌剤として使用されるanthracycline系の薬剤はHIFの抑制作用があり、これが抗癌剤としての効果の一端をになっているものの、その副作用としての心不全の発症にも寄与していることを示した。

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

血管内皮細胞を使用した解析は順調に進行し、更にそこから派生した様々な研究の派生効果を得ることが出来ている。

Strategy for Future Research Activity

これまでに得られた成果を応用して、尿細管細胞を使用した実験およびモデル動物を使用した実験を進めていき、腎臓病学の病態生理に応用していく。

  • Research Products

    (18 results)

All 2013 2012

All Journal Article (3 results) (of which Peer Reviewed: 3 results) Presentation (15 results)

  • [Journal Article] Sperm-associated antigen 4, a novel hypoxia-inducible factor l target, regulates cytokinesis and its expression correlates with the prognosis of renal cell carcinoma.2013

    • Author(s)
      Shoji K, et al.
    • Journal Title

      Am J Pathol

      Volume: (in press)

    • Peer Reviewed
  • [Journal Article] Anthracycline inhibits recruitment of hypoxia-inducible transcription fact ors and suppresses tumor cell migration and cardiac angiogenic respons e in the host.2012

    • Author(s)
      Tanaka T, et al.
    • Journal Title

      J Biol Chem

      Volume: 287 Pages: 34866-82

    • DOI

      10.1074/jbc.M112.374587.

    • Peer Reviewed
  • [Journal Article] Dynamic change of the chromatin conformation in response to hypoxia enhances the expression of GLUT3 (SLC2A3) by cooperative interaction of HIF1 and KDM3A.2012

    • Author(s)
      Mimura I, et al.
    • Journal Title

      Mol Cell Biol

      Volume: 32 Pages: 3018-32

    • DOI

      10.1128/MCB.06643-11.

    • Peer Reviewed
  • [Presentation] Downregulation of miR-205 Modulates Cell Susceptibility to Oxidative and Endoplasmic Reticulum Stresses in Renal Tubular Cells.2012

    • Author(s)
      Muratsu S, et al.
    • Organizer
      The 45^<th> Annual Meeting of the American Society of Nephrology.
    • Place of Presentation
      California, USA
    • Year and Date
      20121101-20121103
  • [Presentation] Anthracycline Inhibits Recruitment of Hypoxia-Inducible Transcription Factors, Blunts the Induction of Lysyl Oxidase and Suppresses Migration of Renal Cell Carcinoma.2012

    • Author(s)
      Tanaka T, et al.
    • Organizer
      The 45^<th> Annual Meeting of the American Society of Nephrology.
    • Place of Presentation
      California, USA
    • Year and Date
      20121101-20121103
  • [Presentation] Identification and Characterization of a Novel HIF-1 Target that Regulates Cytokinesis as a Defensive Mechanism against Polyploidy.2012

    • Author(s)
      Shoji K, et al.
    • Organizer
      The 45^<th> Annual Meeting of the American Society of Nephrology.
    • Place of Presentation
      California, USA
    • Year and Date
      20121101-20121103
  • [Presentation] Dynamic Change of the Chromatin Conformation in Response to Hypoxia Enhances the Expression of GLUT3 (SLC2A3) by Cooperative Interaction of HIF1 and KDM3A.2012

    • Author(s)
      Mimura l, et al.
    • Organizer
      The 45^<th> Annual Meeting of the American Society of Nephrology.
    • Place of Presentation
      California, USA
    • Year and Date
      20121101-20121103
  • [Presentation] ANGPTL4, a Mediator of Nep!irotic Syndrome, Is Induced through a HIF1 alpha-PPAR beta/delta Axis under Hypoxia.2012

    • Author(s)
      Inoue T, et al.
    • Organizer
      The 45^<th> Annual Meeting of the American Society of Nephrology.
    • Place of Presentation
      California, USA
    • Year and Date
      20121101-20121103
  • [Presentation] Downregulation of miR-205 Modulates Cell Susceptibility t0 Oxidative and Endoplasmic Reticulum Stresses in Renal Tubular Cells.2012

    • Author(s)
      Muratsu S, et al.
    • Organizer
      The 45^<th> Annual Meeting of the American Society of Nephrology.
    • Place of Presentation
      California, USA
    • Year and Date
      20121101-20121103
  • [Presentation] miR-205 modulates cellular senescence state caused by oxidative and endoplasmic reticulum (ER) stresses in renal tubular cells.2012

    • Author(s)
      Muratsu S, et al.
    • Organizer
      Keystone Symposium: Aging and diseases of aging.
    • Place of Presentation
      シェラトン都ホテル、東京
    • Year and Date
      20121022-20121027
  • [Presentation] Synchronous recruitment of two transcription complexes exist under synergistic induction of ANGPTL4 by two different stimuli.2012

    • Author(s)
      Inoue T, et al.
    • Organizer
      Keystone Symposium: Aging and diseases of aging.
    • Place of Presentation
      シェラトン都ホテル、東京
    • Year and Date
      20121022-20121027
  • [Presentation] Glyoxalase I ameliorates age-related endothelial dysfunction.2012

    • Author(s)
      Jo A, et al.
    • Organizer
      Keystone Symposium: Aging and diseases of aging.
    • Place of Presentation
      シェラトン都ホテル、東京
    • Year and Date
      20121022-20121027
  • [Presentation] GLUT3 expression is enhanced by chromatin conformational change in response to hypoxia via cooperative interaction of HIF1 and KDM3A.2012

    • Author(s)
      Mimura I, et al.
    • Organizer
      Keystone Symposium: Aging and diseases of aging.
    • Place of Presentation
      シェラトン都ホテル、東京
    • Year and Date
      20121022-20121027
  • [Presentation] Epigenetic modulation of renal ischemic response.2012

    • Author(s)
      Nangaku M
    • Organizer
      ISN Forefront Systems Biology and the Kidney.
    • Place of Presentation
      Michigan, USA(招待講演)
    • Year and Date
      20120607-20120610
  • [Presentation] ChIP-seq revealed dynamic change of the chromatin conformation of GL UT3 in response to hypoxia via epigenetic modification.2012

    • Author(s)
      Mimura I, et al.
    • Organizer
      ISN Forefront Systems Biology and the Kidney.
    • Place of Presentation
      Michigan, USA
    • Year and Date
      20120607-20120610
  • [Presentation] Activation of a HIF1 alpha-PPAR delta axis underlies the induction of ANGPTL4, a mediator of nephrotic syndrome, under hypoxia.2012

    • Author(s)
      Inoue T, et al.
    • Organizer
      ISN Forefront Systems Biology and the Kidney.
    • Place of Presentation
      Michigan, USA
    • Year and Date
      20120607-20120610
  • [Presentation] 生活習慣病と癌における低酸素とHIFの役割の解明.2012

    • Author(s)
      南学正臣
    • Organizer
      第35回日本分子生物学会年会
    • Place of Presentation
      福岡国際会議場、福岡 Japan(招待講演)
    • Year and Date
      2012-12-12
  • [Presentation] Uremia and hypoxic organ damage: a long-term consequence.2012

    • Author(s)
      Nangaku M
    • Organizer
      30th International Society of Blood Purification.
    • Place of Presentation
      パシフィコ横浜 Japan(招待講演)
    • Year and Date
      2012-09-07

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Published: 2014-07-16  

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