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The mechanisms of the initiation and development of atherosclerosis

Research Project

Project/Area Number 61480208
Research Category

Grant-in-Aid for General Scientific Research (B)

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

Principal Investigator

FUKUZAKI Hisashi  Kobe University School of Medicine,Professor, 医学部, 教授 (90030824)

Co-Investigator(Kenkyū-buntansha) KAWAHARA Yasuhiro  Kobe University School of Medicine,Assistant professor, 医学部, 助手 (80169755)
WATANABE Yoshio  Kobe University School of Medicine,Institute for Animal Reserach Assoclate Profe, 医学部附属動物実験施設, 助教授 (00031401)
ISHIKAWA Yuichi  Kobe University School of Medicine,Lecturer, 医学部, 講師 (90159707)
YOKOYAMA Mitsuhiro  Kobe University School of Medicine,Associate Professor, 医学部, 助教授 (40135794)
高野 新二  神戸大学, 医学部附属病院, 講師 (30116222)
Project Period (FY) 1986 – 1987
Project Status Completed (Fiscal Year 1987)
Budget Amount *help
¥5,500,000 (Direct Cost: ¥5,500,000)
Fiscal Year 1987: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1986: ¥4,500,000 (Direct Cost: ¥4,500,000)
KeywordsAtherosclerosis / PDGF / cholesterol metabolism apolipoprotein / sugar chain / アポ蛋白 / アスパラギン結合糖鎖 / 動脈硬化症 / 細胞増殖因子 / Cキナーゼ / カルシウム
Research Abstract

To elucidate the mechanisms of the initiation and development of atherosclerosis,the following investigations were carried out.
1. The interaction of platelets and vascular walls. The helical strips of coronary artery isolated from normal and WHHL rabbit were incubated in an organ with oxygenated Krebs-Henseleit solution. The isometric tension was recorded. The contractile responses to platelets were well correlated to the numbers of platelets stimulated with thrombin. This contraction was inhibited by methysergide (5HT antagonist) but not by Ketanserin (5HT_2-selective antagonist).
The dose-response curve showed that exogenous 5HT contracted the helical strips at lower concentration (10^<-10>M) than histamine (10^<-7>M). The maximum contraction was obtained by histamine. The contractile responses to ergonovin in WHHL rabbits were greater than normal. The progression of atherosclerosis intensified the contractile responses to the ergonovine.
2. Cell Growth and PDGF In Swiss 3T3 cells,PDGF … More binding to cell membrane stimulated phospholipase C PIP_2 was degraded to DG and IP_3. DG activated protein kinase C and IP_3 mobilized Ca^<++> ion from sarcoplasmic reticulum.At the same time, The amount of mRNA of c-myc gene was increased. Both TPA and OAG increased mRNA of c-myc gene without the mobilization of Ca_<++>. A23187 increased mRNA of c-myc gene without activation of protein kinase C. The synthesis of DNA was increased in PDGF stimulated cells only shen insulin was added.Those findings were also observed in rabbit cultured vascular smooth muscle cells.
3. The mechanisms of lipid accumulation In isolated mouse peritoneal macrophages, the association of ^<125>I-<beta>VLDL was incresed by the calcium blockers,nifedipine and TMB-8. The degradation of ^<125>I-<beta>VLDL was also increased in the presence of calcium blockers. It was suggested that Ca^<++> might have the impotant role in cholesterol metabolism. 4. The structures of asparagine-linked sugar chains of apolipoprotein B-100. The analysis of sugar chains of Apo-B showed that Apo B contained neutral(N)and two different acid sugar chains (A_1,A_2) The ratio was 3:4:3 respectively. The roles of sugar chains remained to be investigated. The furter investigations will be performed to elucidate the mechanisms of atherosclerosis. Less

Report

(2 results)
  • 1987 Final Research Report Summary
  • 1986 Annual Research Report
  • Research Products

    (23 results)

All Other

All Publications (23 results)

  • [Publications] Y. Ishikawa: Journal of Japan Atherosclerosis Society. 14. 919-923 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] K. Kariya: Atherosclerosis. 63. 251-255 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Y. Ishikawa: Atherosclerosis. 64. 79-80 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] K. Awano: Journal of Japan Atherosclerotic Society. 15. 673-678 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Y. Kawahara: Proceedings current concept of critical gene expression in carcinogenesis. (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] T. Taniguchi: Archives of Biochemistry and Biophysics.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] M. Yokoyama, et al: Circulation Research.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] M. Yokoyama, et al: J. Pharmacol. Exp. Ther.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 川原康洋: "「血小板1986」細胞増殖とPDGFの作用機構" 科学評論社, 101-111 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 横山光宏: "「血管攣縮」血管攣縮における血小板活性化の意義" アカデミック・プレス・ジャパン, 165-179 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Y. Ishikawa: "Proceedings of international symposium on the role of blood flow in" Springer Verlay, (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Y.Ishikawa et al: "Nifedipine suppressed atherosclerosis in cholesterol-fed rabbit but not in WHHL rabbit" Atherosclerosis. 64. 79-80 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] K.Kariya et al.: "Possible involvement of protein kinase C in PDGF stimulated DNA synthesis in vascular smooth muscle cells" Atherosclerosis. 63. 251-255 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] K.Awano et al.: "The responsiveness of atherosclerosis rabbit aorta to ergonovine:the effects of atherosclerosis progression" Journal of Japan Atherosclerotic Society. 15. 673-678 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] M.Yokoyama et al.: "A role of protein kinase C in the endothelially mediated relaxation in rabbit aorta" J.Pharmacol.Exp.Ther.to be submitted.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] T.Taniguchi et al.: "The structures of asparagine-linked sugar chains of apolipoprotein B-100" Archives of Biochemistry and Biophysics. to be submitted.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] M.Yokoyama et al.: HBJ publishing. platelet and Coronary Spasm, p.165-179 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] M.Yokoyama et al: Circulation Research.

    • Related Report
      1986 Annual Research Report
  • [Publications] M.Yokoyama at al: J Pharmacol.Exp.Ther.

    • Related Report
      1986 Annual Research Report
  • [Publications] K.Kariya: Atherosclerosis. 63. 251-255 (1987)

    • Related Report
      1986 Annual Research Report
  • [Publications] Y.Ishikawa: Atherosclerosis.

    • Related Report
      1986 Annual Research Report
  • [Publications] Y.Ishikawa: Journal of Japan Atherosclerosis Society. 14. 919-923 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] 横山光宏: "「血管攣縮」血管攣縮攣における血小板活性化の意義" アカデミック・プレス・ジャパン, (1987)

    • Related Report
      1986 Annual Research Report

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Published: 1987-03-31   Modified: 2016-04-21  

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