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Significance of myocardial bridge upon atherosclerosis in The LAD coronary artery

Research Project

Project/Area Number 02807037
Research Category

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

Allocation TypeSingle-year Grants
Research Field Human pathology
Research InstitutionTokyo Medical College

Principal Investigator

ISHII Toshiharu  Assoc.Prof, Dept Pathol, Tokyo Medical College, 医学部, 助教授 (30101893)

Co-Investigator(Kenkyū-buntansha) ASUWA Noriko  Instructor of Pathol, Tokyo Medical College, 医学部, 助手 (00074641)
MASUDA Shigeru  Asist.Prof, Dept Pathol, Tokyo Medical College, 医学部, 講師 (00074667)
Project Period (FY) 1990 – 1992
Project Status Completed (Fiscal Year 1992)
Budget Amount *help
¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1992: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1991: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1990: ¥600,000 (Direct Cost: ¥600,000)
KeywordsCoronary artery / Myocardial bridge / Atherosclerosis / Endothelial cell / Shear stress / 内皮細胞 / ずり応力
Research Abstract

A part of the left anterior descending coronary artery running in the epicardial adipose tissue is often covered by myocardial tissue. This condition is designated as myocardial bridge (MB). We have previously noticed that the intima of the LAD covered by MB is never affected by atherosclerotic process. We investigate such protective effect of MB against atherosclerosis by immunohistochemical and electron microscopy. The intimal thickness beneath MB is remarkably thin in comparison with that before the entrance of MB and after the exit of MB. It consists of only few layers of smooth muscle cell with few collagen fibers and little matrix. All of the smooth muscle cells there show contractile form. In addition, not only there is no lipid deposition, but both types of foam cells derived from either macrophage or smooth muscle cells are absent. By scanning electron microscopy, the spindle-shaped endothelial cells are axially and regularly arranged along the course of the coronary artery. This denotes that the blood flow alternates into the condition of high shear stress under the MB.

Report

(4 results)
  • 1992 Annual Research Report   Final Research Report Summary
  • 1991 Annual Research Report
  • 1990 Annual Research Report
  • Research Products

    (21 results)

All Other

All Publications (21 results)

  • [Publications] Ishii T: "Variations with age and serum cholesterol levels in topographic distribution of macroscopic aortic atherosclerotic lesions as assessed by image analysis methods." Mod Pathol. 3. 713-719 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Ishii T: "Earlobe crease and atherosclerosis.Anautopsy study." J Am Geriater Soc,. 38. 871-876 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Ishii T: "Atherosclerosis suppression in the left anterior descending coronary artery by the Presence of myocardial brige:An ultrastructural study." Mod Pathol. 4. 424-431 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Tracy RE,: "Renal microvascular features of hypertension in Japan,Guatemala,and the United States." Arch Pathol Lab Med. 116. 50-55 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Ishii T, Malcom GT, Osaka T, Masuda S, Asuwa N, Guzman MA, Shimada K, Strong JP: "Variations with age and serum cholesterol levels in topographic distribution of macroscopic aortic atherosclerotic lesions as assessed by image analysis methods" Mod Pathol. 3(6). 713-719 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Ishii T, Asuwa N, Masuda S, Ishikawa Y, Shimada K, Takemoto S: "Earlobe crease and atherosclerosis . Anautopsy study" J Am Geriater Soc. 38(7). 871-876 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Ishii T, Asuwa N, Masuda S, Ishikawa Y, Kiguchi H: "Atherosclerosis suppression in the left anterior descending coronary artery by the presence of myocardial bridge : An ultrastructural study" Mod Pathol. 4(3). 424-431 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Tracy RE, Malcom GT, Oalman MC, Qureshi U, Ishii T, Veles-Duran M: "Renal microvascular features of hypertension in Japan, Guatemala, and the United States" Arch Pathol Lab Med. 116. 50-55 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Takei I,Asaba,Y, Kasatani T,Maruyama T Watanabe K,Ishit: "Suppression of development of diabetes in NOD mice by lactate dehydrogenase Uirus infection" J Autoimmunity. 5. 665-673 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 木口 英子,増田 茂,足羽 紀子,石川 由記雄 石井 嘉晴: "自家古弁移植部の一次創傷治癒における細動脈吻合の意義" 脈管学. 32. 1207-1213 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 金井 弥栄,石井 壽晴,島田 直樹,森永 正二郎 松岡 健市,細田 泰弘: "東京地区における大動脈弼状硬化症の現況.214剖検例の検討" 脈管学. 32. 1259-1266 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] Ishikawa Y,Ishii T Asawa N,Masuda S Kiguchi H: "Sportaneous rupture of aortic arch through an atheromatous plague in pseudoaneurysm" Acta Pathol Jpn. 42. 740-744 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] Ishikawa Y,Ishii T,Masuda S,Asuwa N,Kiguchi H: "Multiple regenersting colonic ulcers in secondary amyloidosis caused by rheumatoid avthritis" Acta Pathol Jpn. 43. 59-64 (1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] 石井 壽治 共訳: "イラスト病理学,細田 孝弘 監訳" 文光堂(東京), 909 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] Ishii T,Asuwa N,Masuda S,et al.: "Atherosclerosis Suppresion of the Left Anterior Descending Coronary Avtery by the Presence of Myocardial Bridge" Mod.Pathol.4. 424-431 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Tracy RE,Malcom GT,Ishii T et al.: "Renal Microvascular Features of Hypertention in Japan,Guatemala,and the United States" Arch Pathol Lab Med. 116. 50-55 (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] Hayashi JN,Ito H,Kanayasu T,Ishii T et al.: "Effects of glucose on migration ,proliferation and tube formation by vascular endothelial cells" Virchows Archiv B.Cell Pathology. 60. 245-252 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Ishii T,Asuwa N,Matuda S,et 21.: "Earーlobe Crease Ahorosclerosis" J Am Geriatr Soc. 39. 36 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 石井 壽晴,足羽 紀子: "血管の機能と障害,動脈硬化の病理" 藤田企画出版, 20-35 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Ishii,T.,Asuwa,N.,Masuda,S.,Ishikawa,Y.,Shimada,K.: "Atherosclerosis suppression in the LAD by the presence of myocardial bridge.An ultrastracturd study." Modern Pathology.

    • Related Report
      1990 Annual Research Report
  • [Publications] Ishii,T.,Makom,GT,.Osaka,T.,Masuda,S.,Asuwa,N.: "Variations with age and serum choleoterol level in the topographic distnbution of macroscopic aortic atherosclerotic lesions as assessed by image analysis methods." Modern Pathology. 3. 713-719 (1990)

    • Related Report
      1990 Annual Research Report

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Published: 1990-04-01   Modified: 2016-04-21  

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