Differential Distribution of ecNOS and iNOS mRNA in Rat Heart after Endotoxin Administration.
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概要
- 論文の詳細を見る
To evaluate the relationship between cardiovascular injury and the pathological significance of endothelial constitutive nitric oxide synthase (ecNOS) and inducible nitric oxide synthase (iNOS) in endotoxic shock, Wistar rats were injected intraperitoneally with 10mg/kg Escherichia coli endotoxin and the resulting cardiovascular changes observed using immunohistochemistry, immunoelectron microscopy, the reverse transcription polymerase chain reaction (RT-PCR) and in situ hybridization at 4, 6, 8 and 10h after endotoxin administration. Immunohistochemical and electron microscopic observations showed that ecNOS was localized in the cytoplasmic vesicles and rough endoplasmic reticulum of the endothelium of coronary arteries and intermyocardial capillaries in both control and endotoxin-treated rats. iNOS was localized in the cytoplasmic vesicles and endoplasmic reticulum of vascular endothelial cells, vascular smooth muscle cells and cardiomyocytes after endotoxin administration. The RT-PCR study confirmed the expression of ecNOS and iNOS mRNA in the heart tissues of all animals including controls. In situ hybridiza-tion showed that ecNOS mRNA was expressed in the cytoplasm of vascular endothelial cells in control and endotoxintreated rats. After endotoxin administration, iNOS mRNA was strongly expressed in vascular endothelial cells, vascular smooth muscle cells, cardiomyocytes and a small number of macroph-ages. Bacterial lipopoly-saccharide induces rapid release of nitric oxide in the microvasculature and cardiomyocytes resulting in the depression of cardiomyocyte contraction. These findings may describe the cardiac response after endotoxin treatment.
- International Heart Journal刊行会の論文
著者
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ASANO Goro
Department of Pathology, Nippon Medical School
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Asano Goro
Department Of Pathology Nippon Medical School
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Naito Zenya
Department Of Pathology
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GUO Fang
Department of Pathology, Nippon Medical School
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Ishiwata Toshiyuki
Department Of Integrative Pathology (second Department Of Pathology) Graduate School Of Medicine Nip
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Nishigaki Ryutaro
First Department Of Internal Medicine Nippon Medical School
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Guo Fang
Department Of Pathology Nippon Medical School
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ISHIWATA Toshiyuki
Department of Pathology, Nippon Medical School
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NAITO Zenya
Department of Integrative Pathology, Nippon Medical School
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