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Basic and Clinical Study on Regression of Cardiac Hypertrophy

Research Project

Project/Area Number 02454262
Research Category

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

Allocation TypeSingle-year Grants
Research Field Circulatory organs internal medicine
Research InstitutionOsaka Medical College

Principal Investigator

KAWAMURA Keishiro  Osaka Medical College, Professor, 医学部, 教授 (00026832)

Co-Investigator(Kenkyū-buntansha) KOIDE Hisashi  Osaka Medical College, Assistant, 医学部, 助手 (40195649)
YAMAMOTO Shouji  Osaka Medical College, Assistant, 医学部, 助手 (00148397)
NISHIMURA Hikaru  Osaka Medical College, Assistant, 医学部, 助手 (40172697)
SUWA Michihiro  OsaKa Medical College, Assistant, 医学部, 助手 (00140145)
Project Period (FY) 1990 – 1991
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥6,700,000 (Direct Cost: ¥6,700,000)
Fiscal Year 1991: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1990: ¥5,700,000 (Direct Cost: ¥5,700,000)
KeywordsRegression of cardiac hypertrophy / Cardiac function / Atrial natriuretic peptides / Cardiocyte architecture / Intracelular organelles of cardiocytes / Spontaneously hypertensive rat / Nifedipine / Lisinopril
Research Abstract

Basic study. In 15-week-old male spontaneously hypertensive rats b (SHR), nifedipine (20mg/kg body weight/ day) (SHR-N) or lisinopril (5mg/kg body weight/day) (SHR-L) was given orally for 20 weeks and cardiac hypertrophy regressed with a significant decrease in hypertension. At 35 weeks of age, left ventricular (LV) function, blood neurohumoral factors and cellular architecture of LV wall were compared among SHR-N, SHR-L, and age-and sex-matched control SHR (SHR-C) and Wistar Kyoto rats (WKY). The animals were anesthetized with pentobarbital, a catheter was introduced into LV eavity via right carotid artery and LV pressure, its dp/dt and time constant T were recorded. Cardiac output was determined by the thermodilution method. Cardiac functional indexes at rest and during LV volume overloading were similar among SHR-N, L and C. Compared with SHR-C, plasma atrial natriuretic peptides and renin activity were significantly decreased in SHR-L and N, respectively. Scanning electron microsco … More py revealed that, in SHR-C, cardiocytes were thickened and elongated ; their lateral branches (LBs) multiplied and side-to-side junctions (SJs) were diminished in number. In SHR-N, cell width and LB number reduced with a mild blood pressure (BP) suppression, where as in SHR-L, cell width and length were diminished with a moderate BP supression, LBs were fewer and step-to-step junctions were more in number than in SHR-C. Cell size and junctions were comparable to those in 15week-old baseline SHR. Transmission electron microscopy revealed that, in SHR-C, intracellular volume fraction of myofibrils (Vmf) was decreased, mitochondria underwent degeneration and interstitial fibrosis was prominent. In both SHR-N and L, Vmf was similar to that in WKY, mitochondrial changes and interstitial fibrosis were apparently much less prominent than in SHR-C. These results suggest that in addition to antihypertensive effect, cardioprotective mechanisms of Ca-channel blocking with nifedipine and ACE inhibition with lisinopril may play a role for regression of cardiac hypertrophy and cellular remodeling.
Clinical study. LV mass was estimated by MRI and UCG method in patients with normal hearts and those with hypertrophied hearts. UCG method tended to overestimate left ventricular mass in both groups of the patients. MRI method seems to be relatively convenient and accurate to estimate cardiac mass, so that this method may be useful to evaluate regression of myocardial hypertrophy in human subjects. Less

Report

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

    (33 results)

All Other

All Publications (33 results)

  • [Publications] 金原 稔幸: "高血圧自然発症ラットにおける肥大心筋のNifedipine投与による退縮の微細構造" 心筋の構造と代謝. 13. 401-408 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Toshiyuki Kimpara: "Regression of left ventricular hypertrophy by nifedipine in adult spontaneously hypertensive rats:an electron microscopy" J.Clin.Electron Microscopy. 23. 597-598 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Makoto Okabe: "Cellular architecture of hypertrophied myocardium of spontaneously hypertensive rats and its regression with nifedipine treatment:a scanning electron microscope study" Jpn.Heart J.32. 591 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Ken-ichi Sawada: "Architecture of myocardial cells in human cardiac ventricles with concentric and eccentric hypertrophy as demonstrated by quantitative scanning electron microscopy" Heart Vessels. 6. 129-142 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Hikaru Nishimura: "Nifedipine in divided doses does not reverse left ventricular hypertrophy in spontaneously hypertensive rats." Jpn Circ J. 56. 255-261 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Hikaru Nishimura: "Effects of lisinopril on cardiac hypertrophy,central and peripheral hemodynamics and neurohumoral factors in spontaneously hypertensive rats." J Hypertens. (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 河村 慧四郎(分担): "心臓病学,細田瑳一,杉本 恒明編集" 南江堂, 1579 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Hikaru NISHIMURA: "Effects of betaxolol on left ventricular function and hypertrophy in spontaneously hypertensive rats (in Japanese)" Cardiac Structure and Metabolism. 11. 829-838 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Makoto OKABE: "Scanning electron microscopic (SEM) study of hypertrophied myocardium of spontaneously hypertensive rats : regression with long-term nifedipine treatment" J. Clin. Electron Microscopy. 22. 691-692 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Hikaru NISHIMURA: "Effect of arotinolol on left ventricular (LV) function and LV hypertrophy in SHR." Jpn. Heart J.30. 588 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Keishiro KAWAMURA: "Architecture of myocardial cells in hyprtrophied ventricules and those with regression : scanning and transmission electron microscopy (in Japanese)" Protein, Nucleic Acid and Enzyme. 35. No. 10. 1767-1777 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Hikaru NISHIMURA: "Effect of bunazosin on cardiac and renal henodynamics in adult SHR." Jpn. Heart J.31. 560 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Toshiyuki KIMPARA: "Electron microscopic study on regression of left ventricular hypertrophy by nifedipine in adult spontaneously hypertensive rats." Cardiac structure and metabolism. 13. 401-408 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Toshiyuki KIMPARA: "Regression of left ventricular hypertrophy by nifedipine in adult spontaneously hypertensive rats : an electron microscopy" J. Clin. Electron. Microscopy. 23. 597-598 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Hikaru NISHIMURA: "Effect of lisinopril on regression of left ventricular hypertrophy, cardiorenal hemodynamics and neurohumoral factors in SHR" Jpn. Heart J.32. 564 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Makoto OKABE: "Cellular architecture of hypertrophied myocardium of spontaneously hypertensive rats and its regression with nifedipine traeatment : a scanning electron microscope study" Jpn. Heart J.32. 591 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Ken-ichi SAWADA: "Architecture of myocardial cells in human cardiac ventricles with concentric and eccentric hypertrophy as demonstrated by quantitative scanning electron microscopy" Heart Vessels. 6. 129-142 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Hikaru NISHIMURA: "Nifedipine in divided doses dose not reverse left ventricular hypertrophy in spontaneously hypertensive rats" Jpn Circ J. 56. 255-261 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Hikaru NISHIMURA: "Effects of lisinopril on cardiac hypertrophy, central and peripheral hemodynamics and neurohumoral factors in spontaneously hypertensive rats" J Hypertens. (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Makoto OKABE: "Scanning electron microscopic study of myocardium in an autopsy case of restrictive cardiomyopathy" J. Clin. Electron Microscopy. (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Keishiro KAWAMURA: "Structure and function of cardiocytes." Cardiovascular Medicine, S. Hosoda, T. Sugimoto, eds.Nankodo. 2-12 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Makoto OKABE: "Cellular architecture of hypertrophied myocardium of spontaneously hypertensive rats and its regression with nifedipine treatment:a scanning electron microscope study" Jpn.Heart J.32. 591 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 金原 稔幸: "高血圧自然発症ラットにおける肥大心筋の退縮の微細構造" 心筋の構造と代謝. 13. 401-408 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Toshiyuki KIMPARA: "REGRESSION OF LEFT VENTRICULAR HYPERTROPHY BY NIFEDIPINE IN ADULT SPONTANEOUSLY HYPERTENSIVE RATS:AN ELECTRON MICROSCOPY" J.Clin.Electron Microscopy. 23. 597-598 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Hikaru NISHIMURA: "Effects of lisinopril on cardiac hypertrophy,central and peripheral hemodynamics and neurohumoral factors in spontaneously hypertensive rats" J.Hypertens. (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] Makoto OKABE: "Scanning electron microscopic study of the myocardium in an autopsy case of restrictive cardiomyopathy" J.Clin.Electron Microscopy. (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] 河村 慧四郎(分担)(細田 瑳一,杉本 恒明編集): "心臓病学" 南江堂, 1579 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 河村 慧四郎: "心肥大ならびに退縮した肥大心の心筋微細構築" 蛋白核酸酵素. 35. 1767-1777 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Hikaru NISHIMURA: "Effects of Bunazosin on Cardiac and Renal Hemodynamics in Adult SHR" Jpn.Heart J.31. 560 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Makoto OKABE: "SCANNING ELECTRON MICROSCOPIC (SEM) STUDY OF HYPERTROPHIED MYOCARDIUM OF SPONTANEOUSLY HYPERTENSIVE RAYS:REGRESSION WITH A LONGーTERM NIFEDIPINE TREATMENT" J.Clin.Electron Microscopy. 22. 691-692 (1989)

    • Related Report
      1990 Annual Research Report
  • [Publications] 金原 稔幸: "高血圧自然発症ラットにおける肥大心筋の退縮の微細構造" 心筋の構造と代謝. 13. (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] Toshiyuki KIMPARA: "REGRESSION OF LEFT VENTRICULAR HYPERTROPHY BY NIFEDIPINE IN ADULT SPONTANEOUSLY HYPERTENSIVE RATS:AN ELECTRON MICROSCOPY" J.Clin.Electron Microscopy. (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] Hikaru NISHIMURA: "Effects of Lisinopril on Regression of Left Ventricular Hypertrophy,Cardiorenal Hemodynamics and Neurohumoral Factors in SHR" Jpn.Heart J.(1991)

    • Related Report
      1990 Annual Research Report

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

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