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2009 Fiscal Year Annual Research Report

インスリン産生膵β細胞の発生・分化、機能における糖転移酵素EXTL3の関与

Research Project

Project/Area Number 20590312
Research InstitutionIwate Medical University

Principal Investigator

那谷 耕司  Iwate Medical University, 薬学部, 教授 (90202233)

Co-Investigator(Kenkyū-buntansha) 菅原 明  東北大学, 大学院・医学系研究科, 教授 (90270834)
Keywords膵β細胞 / EXTL3 / ヘパラン硫酸 / ノックアウトマウス / 糖転移酵素 / EXTファミリー / 膵ランゲルハンス島 / 遺伝性多発外骨腫
Research Abstract

本研究計画では、ヘパラン硫酸の生合成に関与する糖転移酵素EXTL3遺伝子を膵β細胞特異的に欠失したマウスを作製し、膵β細胞の発生・分化、機能におけるEXTL3の役割を明らかにするとともに、膵β細胞特異的EXTL3欠損マウスを糖尿病モデル動物として開発・利用する。
当該年度では以下の成果が得られた。
1. 膵β細胞特異的EXTL3欠損マウス膵ランゲルハンス島の抗ヘパラン硫酸抗体による免疫染色
膵β細胞特異的EXTL3欠損マウスの膵ランゲルハンス島を抗ヘパラン硫酸抗体と抗Cre-recombinase抗体により二重染色したところ、抗Cre-recombinase抗体で染色される細胞は抗ヘパラン硫酸抗体で染色されなかった。また,Cre-recombinase(+)/ヘパラン硫酸(-)の細胞は抗インスリン抗体で染色されたことから,EXTL3が欠失した膵β細胞ではヘパラン硫酸が合成されていないことが確認された。
2. 膵β細胞特異的EXTL3欠損マウスの膵β細胞機能の解析
膵β細胞特異的EXTL3欠損マウスの血糖値、血中インスリン値を週齢を追って調べたところ,随時血糖値・インスリン値,空腹時血糖値・インスリン値ともにコントロールのマウスと比較して有意な差は認められなかった。
以上の結果を踏まえ,現在膵β細胞特異的EXTL3欠損マウスの耐糖能,膵β細胞特異的EXTL3欠損マウスから分離したランゲルハンス島のインスリン合成能・分泌能,インスリン産生細胞の増殖能について解析を進めている。

  • Research Products

    (18 results)

All 2010 2009

All Journal Article (4 results) (of which Peer Reviewed: 4 results) Presentation (14 results)

  • [Journal Article] Assisting the diagnosis of Graves' hyperthyroidism with Bayesian-type and SOM-type neural networks by making use of a set of three routine tests and their correlation with free T4.2009

    • Author(s)
      Sato, W.
    • Journal Title

      Biomed. Pharmacother. 59

      Pages: 288-293

    • Peer Reviewed
  • [Journal Article] Thiazolidinediones inhibit REG Ia gene transcription in gastrointestinal cancer cells.2009

    • Author(s)
      Yamauchi, A.
    • Journal Title

      Biochem. Biophys. Res.Commun. 379

      Pages: 743-748

    • Peer Reviewed
  • [Journal Article] Important role of heparan sulfate in the morphogenesis, ss-cell proliferation, and insulin secretion of mouse pancreatic islets.2009

    • Author(s)
      Takahashi, I.
    • Journal Title

      Biochem. Biophys. Res.Commun. 383

      Pages: 113-118

    • Peer Reviewed
  • [Journal Article] Peroxisome proliferator-activated receptor gamma (PPAR_Y) in human prostate carcinoma.2009

    • Author(s)
      Nakamura, Y.
    • Journal Title

      Pathol.Int. 59

      Pages: 288-293

    • Peer Reviewed
  • [Presentation] Prostacyclin analogs rapidly stimulates endothelial nitricoxide synthase phosphorylation through cAMP/PKA pathway in vascular endothelial cells.2010

    • Author(s)
      Kudo, M.
    • Organizer
      14th International Congress of Endocrinology.
    • Place of Presentation
      京都
    • Year and Date
      20100326-20100330
  • [Presentation] Measurements of aldosterone in human plasma by liquid chromatography-electrospray ionization tandem mass spectrometry (LC-ESI-MS/MS) : comparison to radioimmunoassays.2010

    • Author(s)
      Kudo, M.
    • Organizer
      14th International Congress of Endocrinology.
    • Place of Presentation
      京都
    • Year and Date
      20100326-20100330
  • [Presentation] Negative regulation of CYP11B2 expression and aldosterone production in adrenocortical carcinoma H295R cells by PPAR_Y.2010

    • Author(s)
      Uruno, A.
    • Organizer
      14th International Congress of Endocrinology.
    • Place of Presentation
      京都
    • Year and Date
      20100326-20100330
  • [Presentation] Role of retinoic acid receptor on ACTH secretion and POMC gene expression in AtT.20 corticotroph cells.2010

    • Author(s)
      Uruno, A.
    • Organizer
      14th International Congress of Endocrinology.
    • Place of Presentation
      京都
    • Year and Date
      20100326-20100330
  • [Presentation] Measurements of aldosterone in human plasma by liquid chromatography-electrospray ionization tandem mass spectrometry (LC-ESI-MS/MS) : comparison to radioimmunoassays.2010

    • Author(s)
      Kudo, M.
    • Organizer
      International Symposium for Aldosterone and Related Substances in Hypertension.
    • Place of Presentation
      仙台
    • Year and Date
      20100323-20100324
  • [Presentation] Autoimmunity against REG family antigens in Japanese diabetes patients.2009

    • Author(s)
      Shervani NJ, Nata K, Noguchi N, Takahashi I, Ikeda T, Yamauchi A, Yoshikawa T, Uruno A, Takasawa S, Okamoto H, Sugawara A
    • Organizer
      The 20th World Diabetes Congress.
    • Place of Presentation
      Montreal
    • Year and Date
      20091018-20091022
  • [Presentation] Autoantibodies to REG family proteins in Japanese diabetes patients.2009

    • Author(s)
      Shervani NJ, Noguchi N, Ikeda T, Takahashi I, Yoshikawa T, Uruno A, Nata K, Takasawa S, Okamoto H, Sugawara A
    • Organizer
      45th Annual Meeting of the European Association for the Study of Diabetes.
    • Place of Presentation
      Vienna
    • Year and Date
      20090929-20091002
  • [Presentation] Retinoic acid receptor-alpha positively regulates ACTH secretion and POMC gene expression in AtT20 corticotroph cells.2009

    • Author(s)
      Uruno, A.
    • Organizer
      The Endocrine Society 91st Annual Meeting.
    • Place of Presentation
      Washington, DC
    • Year and Date
      20090610-20090613
  • [Presentation] PPARgamma suppresses angiotensin II- and potassium-induced CYP11B2 expression and aldosterone production in adrenocortical carcinoma H295 cells.2009

    • Author(s)
      Uruno, A.
    • Organizer
      The 35th International Aldosterone Conference.
    • Place of Presentation
      Washington, DC
    • Year and Date
      20090608-20090609
  • [Presentation] Sera from Japanese diabetes patients show autoimmunity to REG family antigens.2009

    • Author(s)
      Shervani, N.J.
    • Organizer
      第82回 日本生化学会大会
    • Place of Presentation
      神戸
    • Year and Date
      2009-10-23
  • [Presentation] 2型リアノジン受容体遺伝子にはGG-AG配列で切断されるイントロンが存在する2009

    • Author(s)
      池田崇之
    • Organizer
      第82回 日本生化学会大会
    • Place of Presentation
      神戸
    • Year and Date
      2009-10-23
  • [Presentation] Prostacyclin analogs rapidly induce nitric oxide production through endothelial nitric oxide synthase phosphorylation in vascular endothelial cells.2009

    • Author(s)
      Kudo, M.
    • Organizer
      10th International Symposium on Mechanisms of Vasodilatation.
    • Place of Presentation
      松島
    • Year and Date
      2009-06-02
  • [Presentation] Structural characterization of heparan sulfate in conventional and conditional Extl3-deficient mice.2009

    • Author(s)
      Kaneiwa, T.
    • Organizer
      Hokkaido University-Mahidol University Joint Symposium.
    • Place of Presentation
      札幌
    • Year and Date
      2009-05-12
  • [Presentation] Predominant role of REG Ia among the REG gene family in the proliferation of human colorectal adenocarcinoma.2009

    • Author(s)
      Yoshikawa, T.
    • Organizer
      American Association for Cancer Research 100th Annual Meeting 2009.
    • Place of Presentation
      Denver
    • Year and Date
      2009-04-04

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Published: 2011-06-16   Modified: 2016-04-21  

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