Progression of Coronary Atherosclerosis Relates to the Onset of Myocardial Infarction in an Animal Model of Spontaneous Myocardial Infarction (WHHLMI Rabbits)
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概要
- 論文の詳細を見る
Recently, we developed myocardial infarction-prone WHHLMI rabbits from coronary atherosclerosis-prone WHHL rabbits (WHHLCA rabbits) by selective breeding. In this study, we examined the relation of atherosclerotic plaques to the onset of myocardial infarction. We examined myocardial lesions of 378 WHHL rabbits born between 1992 and 2000, and atherosclerosis lesions of 93 WHHLCA and 82 WHHLMI rabbits. The aortic lesions were evaluated as percent surface lesion area. The coronary lesions were evaluated as cross sectional narrowing using sections prepared at 500 or 1,000 μm intervals. Serum lipid levels were assayed with enzymatic methods. The cumulative incidence of fatal myocardial infarction between 11 and 35 months old was 90% in WHHLMI rabbits and 21% in WHHLCA rabbits, respectively. Selective breeding increased the serum cholesterol levels by about 200 mg/dl despite there being no changes in triglyceride levels. Aortic and coronary atherosclerosis progressed markedly in WHHLMI rabbits compared to WHHLCA rabbits. Especially, WHHLMI rabbits over 15 months old showed more than 90% cross sectional narrowing of the left circumflex arteries, main stem of the left coronary artery, and the origin portion of the right coronary artery. In addition, there were no gender differences in atherosclerotic lesions of both aortas and coronary arteries. In conclusion, the present study showed that marked progression of coronary atherosclerosis was probably associated with spontaneous development of myocardial infarction in WHHLMI rabbits.
- 社団法人 日本実験動物学会の論文
著者
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Shiomi Masashi
Institute for experimental animals, Kobe University School of Medicine
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Shiomi Masashi
Institute For Experimental Animals Kobe University School Of Medicine
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ITO Takashi
Institute for Experimental Animals, Kobe University School of Medicine
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Shiomi M
Kobe Univ. School Of Medicine Kobe Jpn
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Shiomi Masashi
Institute For Experimental Animals Kobe University Graduate School Of Medicine
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YAMADA Satoshi
Institute for Experimental Animals, Kobe University School of Medicine
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Yamada Satoshi
Institute For Experimental Animals Kobe University School Of Medicine
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Yamada Satoshi
Laboratory Of Plant Nutrition Faculty Of Agriculture Hokkaido University
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Yamada Satoshi
Faculty Of Agriculture Tottori University
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Shiomi M
Institute For Experimental Animals Kobe University School Of Medicine
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Yamada S
Fac. Agr. Tottori Univ.
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