Effects of Cellular Cardiomyoplasty on Ventricular Remodeling Assessed by Doppler Echocardiography and Topographic Immunohistochemistry

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概要

• 論文の詳細を見る

• Background Myocardial infarction (MI) promotes deleterious remodeling of the myocardium, resulting in ventricular dilation and pump dysfunction. Supplementing infarcted myocardium with neonatal myocyte would attenuate deleterious remodeling and so the present study used Doppler echocardiography and histology to analyze the cardiac function and histological regeneration of the damaged myocardium after cellular cardiomyoplasty. Methods and Results Experimental MI was induced by 24-h coronary ligation followed by reperfusion in adult male Lewis rats and neonatal myocytes were injected directly into the infarct and peri-infarct regions. Three groups of animals were studied at 4 weeks after cellular cardiomyoplasty: noninfarcted control (control), MI plus sham injection (MI), and MI plus cell injection (MI+cell). Ventricular remodeling and cardiac performance were assessed by Doppler echocardiography or contrast echocardiography. At 4 weeks after cellular cardiomyoplasty, MI + cell hearts exhibited attenuation of global ventricular dilation and cardiac function compared with MI hearts not receiving cellular cardiomyoplasty. Immunohistochemically, connexin-43-positive small cells were observed in the vicinity of the infarction in MI+cell heart. By electron microscopy, these cells contained myofilaments with Z-bands and poorly developed intercalated disks, suggesting neonatal myocardial cells. Furthermore, the myocardial cells were often making close contact with interstitial cells. Conclusions Implanted neonatal myocytes form viable grafts after MI, resulting in attenuated ventricular dilation and enhanced contractile function. Echocardiography, electron microscopy, and immunohistochemistry are useful methods for assessing the functional and histological regeneration of the damaged myocardium.

• 社団法人日本循環器学会の論文
• 2004-05-20

著者

• YOSHIYAMA Minoru

  Departments of Internal Medicine and Cardiology, Osaka City University Graduate School of Medicine

• Yoshikawa Junichi

  Department of Internal Medicine and Cardiology, Osaka City University School of Medicine

• Yoshiyama M

  Department Of Internal Medicine And Cardiology Osaka City University Medical School

• Yamaguchi Junichi

  Division Of Cardiology Saitama Prefecture Cardiovascular And Respiratory Center

• Hayashi Tetsuya

  Third Department of Internal Medicine, Osaka Medical College

• Kitaura Yasushi

  3rd Division, Department of Internal Medicine, Osaka Medical College

• Hayashi T

  Third Dep. Of Medicine Osaka Medical Coll. Jpn

• Hayashi Tetsuya

  大阪医科大学 薬理学教室

• Yoshiyama Minoru

  Department Of Internal Medicine And Cardiology Graduate School Of Medicine Osaka City University

• Matsumoto Ryo

  Department of Cardiology, Osaka City University Graduate School of Medicine

• Takeuchi Kazuhide

  Department of Internal Medicine and Cardiology, Osaka City University Graduate School of Medicine

• Ozaki Takeshi

  Bell land general hospital

• Takeuchi Kazuhide

  大阪市立大学 医学部循環器病態内科学

• Takeuchi Kazuhide

  大阪市立大学 医学研究科循環器病態内科学

• Takeuchi Kazuhide

  The First Department Of Internal Medicine Osaka City University Medical School

• Kitaura Yasushi

  Third Department Of Internal Medicine Osaka Medical College

• Muro Takashi

  大阪市立大学 医学部薬理学

• Muro Takashi

  Actmce1

• Muro Takashi

  大阪市立大学 医学部循環器病態内科学

• Muro Takashi

  大阪市立大学 医研究 循環器病態内科

• IZUMI Yasukatsu

  Department of Pharmacology, Osaka City University Medical School

• Kitaura Yasushi

  Department Of Internal Medicine Iii Osaka Medical College

• Matsumoto Ryo

  Department Of Cardiology Osaka City University Graduate School Of Medicine

• Matsumoto Ryo

  Osaka City Univ.

• Matsumoto Ryo

  Department Of Bioengineering Faculty Of Engineering Kagoshima University

• Takeuchi Kazuhide

  Department Of Internal Medicine And Cardiology Osaka City University Medical School

• Kadohira Tadayuki

  千葉大学 医学研究院循環病態医科学

• Nakamura Yasuhiro

  Department Of Internal Medicine And Cardiology Osaka City University Medical School

• Omura Takashi

  Department of Internal Medicine and Cardiology, Osaka City University Medical School

• Yoshikawa Junichi

  Department Of Cardiology Osaka City University Medical School

• Izumi Yasukatsu

  Pharmacology, Graduate School of Medicine, Osaka City University

• Nakamura Yasuhiro

  Department Of Health Administration School Of Allied Health Sciences Kitasato University

• Omura Takashi

  Department Of Cardiology Yamada Red Cross Hospital

• Izumi Yasukatsu

  Department Of Pharmacology Osaka City University Graduate School Of Medicine

• Hayashi Tetsuya

  Third Department Of Internal Medicine Osaka Medical College

• Hanafusa Toshiaki

  Third Department Of Medicine Osaka Medical College

• Izumi Yuko

  Department Of Pharmacology Osaka City University Medical School

• Izumi Yasukatsu

  Department Of Pharmacology Osaka City University Medical School

• Nakamura Yasuhiro

  Department Cardiology Baba Memorial Hospital

• Yoshiyama Minoru

  Department Of Cardiology And Internal Medicine Medical School Osaka City University

• Kawakami Yoshihide

  Department Of Cardiology Institute Of Clinical Medicine University Of Tsukuba

• YOSHIYAMA Minoru

  Department Internal Medicine and Cardiology, Osaka City University School of Medicine

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