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内皮・平滑筋・繊維芽細胞の三次元共培養による血管構築を摸した血管モデルの作製

Research Project

Project/Area Number 14657174
Research Category

Grant-in-Aid for Exploratory Research

Allocation TypeSingle-year Grants
Research Field Circulatory organs internal medicine
Research InstitutionKyushu University

Principal Investigator

金出 英夫  九州大学, 大学院・医学研究院, 教授 (80038851)

Co-Investigator(Kenkyū-buntansha) 平野 勝也  九州大学, 大学院・医学研究院, 講師 (80291516)
西村 淳二  九州大学, 大学院・医学研究院, 助教授 (90237727)
Project Period (FY) 2002 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 2003: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 2002: ¥2,000,000 (Direct Cost: ¥2,000,000)
Keywords線維芽細胞 / 血管モデル / NIH3T3細胞 / Rho-kinase / Protein inase C / CPI-17 / GF10920X / 血管内皮細胞 / 血管リモデリング / 血管平滑筋細胞 / Protein kinase A / 血管拘縮
Research Abstract

動脈硬化や血管形成術後の血管局所では、収縮性の亢進・攣縮を認めることがある。病変局所の平滑筋細胞や浸潤・増殖細胞において、収縮性亢進に関係する種々の酵素・蛋白質の発現変化が起こっている、と一般に考えられているが、その直接証拠は少ない。人工血管を作製し、これらの酵素・蛋白質の遺伝子を人工血管壁構成細胞に発現させることによって、収縮性の亢進・攣縮におけるその役割の直接証明が可能となる筈である。
本年度は線維芽細胞のcell lineであるNIH3T3細胞を用いる事によって、等尺性収縮を測定可能な人工血管中膜モデルを作成した。さらにNIH3T3細胞に高効率に遺伝子導入できるベクターを開発し、CPI-17の過剰発現による線維芽細胞の収縮性の変化を検討した。CPI-17を過剰発現させた細胞とコラーゲンゲルを用いて作製した血管中膜モデルのリング標本は、PKCの活性化剤であるPDBuの投与により、10%FBSによる収縮の2-3倍の張力を発生した。一方、ベクターだけを発現させたコントロールではPDBuの投与により、むしろ基線以下に弛緩した。また、PKCによるリン酸化部位である38番目のThrをAlaあるはGluに変異させたCPI(CPI38AおよびCPI38E)では、PDBuによる収縮は得られず、コントロールと同様に弛緩した。CPI-17を過剰発現させた細胞のPDBuによる収縮は、PKC inhibitorであるGF109203Xにより抑制されたが、Rho kinase inhibtorであるY27632では抑制されなかった。線維芽細胞を中膜構成細胞として作製した人工血管モデルにおいては、PKCの活性化は本来は弛緩を起こすが、CPI-17を発現させると収縮に転じることが明らかになった。

Report

(2 results)
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • Research Products

    (17 results)

All Other

All Publications (17 results)

  • [Publications] Nakayama T: "Unproductive cleavage and inactivation of protease-activated receptor-1 by trypsin in vascular endotheial cells."Br J Pharmacol. 138. 121-130 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Fukuyama K: "Down regulation of vascular angiorensin II type 1 receptor by thyroid hormone."Hypertension. 41. 598-603 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Takahashi R: "The modulation of Ca^<2+> sensitivity regulates contractility of rabbit corpus cavernosum smooth muscle."J Urology. 169. 2412-2416 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Hirano K: "Sequence requirement for nuclear localization and growth inhibition of p27^<Kip1R>, a degradation-resistant isoform of p27^<KiP1>."J Cell Biochem. 89. 191-202 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Yamanaka J: "An important role for the Na^<+>-Ca^<2+> exchanger in the decrease in cytosolic Ca^<2+> concentration induced by isoprenaline in the porcine coronary artery."J Physiol. 549. 553-562 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Eto W: "Intracellular alkalinization induces Ca^<2+> influx via non-voltage-operated Ca^<2+> channels in the rat aortic smooth muscle cells."Cell Calcium 34 : 477-484, 2003. 34. 477-484 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Maeda Y: "Rho-kinase inhibitor inhibits both myosin phosphorylation-dependent and -independent enhancement of myofilament Ca^<2+> sensitivity in bovine middle cerebral artery."Br J Pharmacol. 140. 871-880 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Ise S: "Theophylline attenuates Ca^<2+> sensitivity and modulates BK channels in porcine tracheal smooth muscle."Br J Pharmacol. 140. 939-947 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Kanaide H: "Cellular mechanism of vasoconstriction induced by angiotensin II : It remains to be determined."Cir Res. 93. 1015-1017 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Hirano K: "Transduction of the N-terminal fragments of MYPT1 enhances myofilament Ca^<2+> sensitivity in an intact coronary artery."Athersclerosis Thromb Vasc Biol. (in press).

    • Related Report
      2003 Annual Research Report
  • [Publications] Nakayama T: "Inactivation of protease activated receptor-1 due to a proteolytic removal of the tethered ilgand by thrombin and trypsin in the human umbilical vein endothelial cells."Biochem Pharmacol. (in press).

    • Related Report
      2003 Annual Research Report
  • [Publications] Koga M: "The long-term deficiency of estrogen enhances the contractile response without affecting the Ca^<2+> - sensitivity of the contractile apparatus in arterial smooth muscle of the female rabbit."J Soc Gynecol Invest. (in press).

    • Related Report
      2003 Annual Research Report
  • [Publications] Ihara E: "Mechanism of down-regulation of L-type Ca^<2+> channel in the proliferating smooth muscle cells of rat aorta"J Cell Biochem. 87. 353-251 (2000)

    • Related Report
      2002 Annual Research Report
  • [Publications] Takahashi R: "The mechanisms for tachykinin-induced contractions of the rabbit corpus cavernosum"Br J Pharmacol. 137. 845-854 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Nakayama T: "Unproductive cleavage an inactivation of protease-activated receptor-1 by trypsin in vascular endotheial cells"Br J Pharmacol. 138. 121-130 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Takahashi R: "The modulation of Ca^<2+> sensitivity regulates contractility of rabbit corpus cavernosum smooth muscle"J Urology. (in press).

    • Related Report
      2002 Annual Research Report
  • [Publications] Hirano K: "Sequence requirement for nuclear localization and growth inhibition of p27^<Kip1R>, a degradation-resistant isofform of p27^<Kip1>"J Cell Biochem. (in press).

    • Related Report
      2002 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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