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Elucidation of Mechanism of Acute Coronary Syndrome in The Process of Coronary

Research Project

Project/Area Number 10470166
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Circulatory organs internal medicine
Research InstitutionKagawa Medical University

Principal Investigator

MATSUO Hirohide  Kagawa Medical University Professor, 医学部, 教授 (90028514)

Co-Investigator(Kenkyū-buntansha) SAKAMOTO Seiji  Kagawa Medical University Associate Professor, 医学部・附属病院, 講師 (60253267)
MIZUSHIGE Katsufumi  Kagawa Medical University Associate Professor, 医学部, 助教授 (90166009)
SENDA Shoichi  Kagawa Medical University Professor, 医学部附属病院, 教授 (30145049)
NOZAKI Shiro  Kagawa Medical University Assistant Professor, 医学部・附属病院, 助手 (80243773)
Project Period (FY) 1998 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥12,200,000 (Direct Cost: ¥12,200,000)
Fiscal Year 1999: ¥2,700,000 (Direct Cost: ¥2,700,000)
Fiscal Year 1998: ¥9,500,000 (Direct Cost: ¥9,500,000)
KeywordsAtherosclerosis / Diabetes Mellitus / Intravascular Ultrasound / Coronary Artery Tonus / Autonomic Nervous System / 血管内エコー法 / 冠動脈硬化 / 冠動脈スパスム / 血管内エコー
Research Abstract

1) Arterial Wall Distensibility During Prestage of Type 11 Diabetes Mellitus in Rats
Aortic damage during prestage of diabetes mellitus (DM) was investigated in Otsuka Long-Evans Tokushima Fatty (OLETF) rats, as an animal model of type 11 DM. Methods : In 30 OLETF and 30 nonDM rats, an oral glucose tolerance test was performed at 10, 20 and 30 weeks of age. At 15 and 30 weeks, intravascular ultrasound images and aortic pressure were recorded. Aortic diameter was measured on the largest and the smallest images during the cardiac cycle and the stiffness parameter β was calculated. The aortic walls were excised for histopathology and the measurement of hydroxyproline at 5, 15 and 30 weeks. At 10 weeks, blood glucose (mg/dl) levels of the OLETF (baseline; 115 ± 7, 2 hrs ; 168 ± 30) were higher than those of the nonDM rats (baseline ; 87 ± 5, 2 hrs ; 118 ± 15 ; p=.02), and plasma insulin concentrations (ng/ml) were higher in the OLETF rats (2 hrs ; 0.82 ± 0.15) than those in the nonDM rats ( … More 2 hrs ; 0. 16 ± 0.64 ; p=.003). At the prediabetic stage (15 weeks), P in OLETF rats (2.5 ± 0.9) was larger than in nonDM rats (1.4 ± 0.4; p=.0006), and the collagen (hydroxyproline) content /dry weight (mg/g) of the aortic wall was significantly higher in the OLETF rats (33.5 ± 3.1) than in the nonDM rats (28.7 ± 3.5 ; p<.05). Histopathological examination showed that from 15 weeks medial wall thickness increased gradually. Hyperinsulinemia may induce changes in the extracellular matrix and impair aortic wall distensibility prior to the development of type II DM..
2) Coronary Arterial Tone and Autonomic Nerve System
The purpose of this study was to assess the role of the autonomic nervous system in the regulation of basal coronary artery tone in normal and atheromatous segments using intravascular ultrasound in humans. In each of twenty two patients, one site of coronary artery was evaluated by means of a 3.2 F, 30-MHz intravascular ultrasound before and after intracoronary administration of 2 mg isosorbide dinitrate (ISDN). We identified the perimeter of the vessel wall with normal or atherosclerotic plaque on ultrasound image. Segmental perimeter for each normal or plaque segment at eccentric plaque site and circumferential perimeter at normal or concentric plaque site and circumferential perimeter at normal or concentric plaque site were measured, and percent change in each perimeter produced by ISDN was calculated. Using heart rate variability analysis on 512 seconds recorded immediately before ISDN administration, cardiac sympathetic and vagal activities were evaluated as the integrated power of the low-frequency (LF : 0.04 to 0.15 Hz ), and high-frequency (HF : 0.15 to 0.4 Hz) spectral components, respectively. ISDN produced increase in the perimeter of the vessel wall in all of 22 sites. A significant correlation of the increase in perimeter by ISDN to the power of HF (r=0.749, p<.001) was observed at 16 normal segments despite no significant correlation to LF. At 13 atheromatous segments, no significant correlation between the morphology and autonomic nerve activity was observed. Basal tone of normal coronary segments by ultrasound are regulated by parasympathetic nerve at rest, whereas the regulation is impaired in mild atherosclerotic segment. Less

Report

(3 results)
  • 1999 Annual Research Report   Final Research Report Summary
  • 1998 Annual Research Report
  • Research Products

    (24 results)

All Other

All Publications (24 results)

  • [Publications] Fukui T,Mizushige K, et al: "Dietary troglitazone dicreases oxidative stress in early stage type II diabetic rats"Life Sci. (in press).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Seki M,Mizushiga K,et al: "Efrect of olprinone phosphodiesterase III inhibitor,on arterial with distensibility:differentiation between aorta and common carotid artery"Heart Vessels. (in press).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Mizushige K,Maatsuo H,et al: "Effects of troglitazone on collagen accumulation and distensibility of aortic wall in prestage of non-insulin dependent diabetes mellitus of OLETF Rats"J Cardiovasc Pharmacol. (in press).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Mizushige K,Maatsuo H,et al: "Alteration in left ventricular diastolic filling and accumulation of myocardial collagen at insulin resistant stage of type II diabetic rats"Circulation. (in press).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Noma T,Mizushige K,et al: "Alteration in aortic wall stiffness and accumlation of collagen during prestage of type II diabetes mellitus in rats"Jpn Circ J. 63. 988-993 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Tokudome T,Mizushige K,et al: "Neurogenic regulation of basal coronary artery tone in human;A two-dimensional intravascular ultrasound study assessed by transesophageal echocardiography"Angioloby. 50. 989-996 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 松尾裕英 他: "内科学"文光堂. 2233 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 松尾裕英 他: "内科学"朝倉書店. 2110 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Fukui T, Noma T, Mizushige K, Aki Y, Kimura S, Abe Y: "Dietary troglitazone decreases oxidative stress in early stage type II diabetic rats."Life Sci.. in press.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Seki M, Mizushige K, Ueda T, Kitadai M, Matsuo H: "Effect of olprinone, phosphodiesterase III inhibitor, on arterial wall distensibility : differentiation between aorta and common carotid artery"Heart Vessels. in press.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Mizushige K, Noma T, Yao L, Yu Y, Kiyomoto H, Hosomi N Fukui T, Kimura S, Abe Y, Matsuo H: "Effects of troglitazone on collagen accumulation and distensibility of aortic wall in prestage of non-insulin dependent diabetes mellitus of Otsuka Long-Evans Tokushima Fatty Rats"J Cardiovace Pharmacol. in press.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Mizushige K, Yao L, Noma T, Kiyomoto H, Yu Y. Hosomi N, Ohmori K, Matsuo H: "Alteration in left ventricular diastolic filling and accumulation of myocardial collagen at insulin resistant prediabetic stage of a type II diabetic rats"Circulation. in press.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Noma T, Mizushige K, Yao L, Yu Y, Kiyomoto H, Hosomi N, Kimura S, Abe Y, Ohmori K, Matsuo H: "Alteration in aortic wall stiffness and accumulation of collagen during prestage of type II diabetes mellitus in rats"Jpn Circ J. 63-12. 988-993 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Tokudome T, Mizushigp K. Ohmori K, Watanabe K, Takagi Y, Takano Y, Matsuo H: "Neurogenic regulation of basal coronary artery tone in human ; A two-dimensional intravascular ultrasound study assessed by transesophageal echocardiography"Angiology. 50-12. 989-996 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Fukui T,Mizushige K,et al: "Dietary troglitazone decreases oxidative stress in early stage type II diabetic rats"Life Sci,. (in press).

    • Related Report
      1999 Annual Research Report
  • [Publications] Seki M,Mizushige K,et al: "Effect of olprinone,phosphodiesterase III inhibitor,on arterial wall distensibility:differentiation between aorta and common carotid artery"Heart Vessels,. (in press).

    • Related Report
      1999 Annual Research Report
  • [Publications] Mizushige K,Matsuo H,et al: "Efects of troglitazone on collagen accumulation and distensibility of aortic wall in prestage of non-insulin dependent diabetes mellitus of OLETF Rats"J Cardiovasc Pharmacol,. (in press).

    • Related Report
      1999 Annual Research Report
  • [Publications] Noma T,Mizushige K,et al: "Alteration in aortic wall stiffness and accumulation of collagen during prestage of type II diabetes mellitus in rats"Jpn Circ J. 63. 988-993 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Tokudome T,Mizushige K,et al: "Neurogenic regulation of basal coronary artery tone in human;A two-dimensional intravascular ultrasound study assessed by transesophageal echocardiography"Angiology. 50. 989-996 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 松尾裕英 他: "内科学"文光堂. 2233 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 松尾裕英 他: "内科学"朝倉書店. 2110 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 徳留 健: "冠動脈トーヌスに対する自立神経活性の影響-血管内エコーを用いた検討-" Jpn Circ J. 63(Suppl)(in press).

    • Related Report
      1998 Annual Research Report
  • [Publications] 徳留 健: "冠動脈トーヌスに対する自律神経支配様式の血管内エコーと心拍変動解析による検討;同一部位でのプラーク部と健常部の比較" Jpn Circ J. 63(Suppl)(in press).

    • Related Report
      1998 Annual Research Report
  • [Publications] 水重 克文: "インターベンションを活かす" 文光堂, 2 (1998)

    • Related Report
      1998 Annual Research Report

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Published: 1998-04-01   Modified: 2016-04-21  

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