Ischemia-Induced Norepinephrine Release, but not Norepinephrine-Derived Free Radicals, Contributes to Myocardial Ischemia : Reperfusion Injury
スポンサーリンク
概要
- 論文の詳細を見る
Background Norepinephrine (NE)-derived free radicals may contribute to myocyte injury after ischemia-reperfusion, so the influence of sympathetic denervation on myocardial ischemia-reperfusion injury was investigated in the present study. Methods and Results Cardiac sympathetic denervation was produced in Wistar rats by a solution of 10% phenol 1 week before ischemia. Atenolol (0.5mg/kg) was intravenously administered 10 min before the coronary occlusion. The left coronary artery was occluded for 30 min and thereafter reperfused. Cardiac interstitial fluid was collected by a microdialysis probe and free radicals in dialysate were determined by electron paramagnetic resonance (EPR) spin trapping, using 5, 5-dimethyl-l-pyrroline-N-oxide as a spin trap. The ratio of infarct size to the ischemic area at risk (I/R) was decreased in both the phenol and atenolol groups compared with control (28.5±11.3,31.8±10.7 vs 50.6±14.7%, p<0.05). During the coronary occlusion, concentrations of interstitial NE increased markedly in the control and atenolol groups, but was unchanged in the phenol group. EPR signal intensity (relative value to internal standard) was maximal at 1 h after reperfusion and was similar in the phenol and control groups (0.32±0.15 vs 0.45±0.19). Conclusions Cardiac denervation protected myocyte against ischemia-reperfusion injury through decreasing direct NE toxicity, but not through decreasing NE-derived free radicals.
- 社団法人日本循環器学会の論文
- 2005-04-20
著者
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IGARASHI Norio
Second Department of Internal Medicine, Graduate School of Medicine, University of Toyama
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FUJII Nozomu
Second Department of Internal Medicine, Graduate School of Medicine, University of Toyama
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IGAWA Akihiko
Second Department of Internal Medicine, Graduate School of Medicine, University of Toyama
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Inoue Hiroshi
The Second Department of Internal Medicine, University of Toyama
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Matsuki Akira
Second Department Of Internal Medicine Graduate School Of Medicine University Of Toyama
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Kondo Takashi
Department Of Radiological Sciences Graduate School Of Medicine And Pharmaceutical Sciences Universi
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Fujii Nozomu
Second Department Of Internal Medicine Graduate School Of Medicine University Of Toyama
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Igawa Akihiko
Second Department Of Internal Medicine Graduate School Of Medicine University Of Toyama
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Igawa Akihiko
富山医科薬科大学 第2内科
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Igarashi Norio
富山大学 医学薬学研究部第2内科
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Igarashi Norio
Second Department Of Internal Medicine Graduate School Of Medicine University Of Toyama
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Inoue Hiroki
Department Of Chemistry Faculty Of Science Kyushu University
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Nakadate Teruo
Second Department Of Internal Medicine University Of Toyama
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Nakadate Teruo
The Second Department of Internal Medicine, University of Toyama
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Matsuki Akira
The Second Department of Internal Medicine, University of Toyama
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Nozawa Takashi
The Second Department of Internal Medicine, University of Toyama
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Nonomura Makoto
The Second Department of Internal Medicine, Toyama Medical and Pharmaceutical University
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Igarashi Norio
The Second Department of Internal Medicine, Toyama Medical and Pharmaceutical University
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Fujii Nozomu
The Second Department of Internal Medicine,Toyama Medical and Pharmaceutical University
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Igawa Akihiko
The Second Department of Internal Medicine, Toyama Medical and Pharmaceutical University
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Asanoi Hidetsugu
The Second Department of Internal Medicine, Toyama Medical and Pharmaceutical University
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Katoh Bunichi
Imuzu Municipal Hospital
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Matsuki Akira
Second Department Of Internal Medicine Toyama University Hospital
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Asanoi Hidetsugu
Imizu Municipal Hospital
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Asanoi Hidetsugu
The Second Department Of Internal Medicine Toyama Medical & Pharmaceutical University
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Kato Bunichi
The Second Department of Internal Medicine
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Igawa Akihiko
The Second Department Of Internal Medicine Toyama Medical And Pharmaceutical University
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Igawa Akihiko
The 2nd Department Of Internal Medicine Toyama Medical And Pharmaceutical University
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Kondo Takashi
Department Of Diagnostic Radiology Tohoku University School Of Medicine
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Kato Bunichi
Imuzu municipal hospital
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Nonomura Makoto
The Second Department Of Internal Medicine University Of Toyama School Of Medicine
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Igarashi Noriko
The 2nd Department Of Internal Medicine Toyama University
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Inoue Hiroshi
The Second Department Of Internal Medicine University Of Tokyo
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Asanoi Hidetsugu
The 2nd Department Of Internal Medicine And Department Of Radiology Toyama Medical And Pharmaceutica
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Asanoi Hidetsugu
The 2nd Department Of Internal Medicine And Department Of Radiology Toyama Medical And Pharmaceutica
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Kondo Takashi
Department Of Chemical Engineering Waseda University
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Kondo Takashi
Department Of Applied Physics Faculty Of Engineering The University Of Tokyo
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Kondo Takashi
Department Of Radiological Sciences Toyama Medical And Pharmaceutical University
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Inoue Hiroshi
The Second Department Of Internal Medicine Toyama Medical Phermaceutical University
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Inoue Hiroshi
The Second Department Of Internal Medicine
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Kondo Takashi
Department Of Agricultural Chemistry The University Of Tokyo
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