Hyperglycemia Impairs Acetylcholine-Induced Vasodilation of Retinal Arterioles Through Polyol Pathway–Independent Mechanisms in Rats
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概要
- 論文の詳細を見る
We previously reported that acetylcholine (ACh)–induced vasodilation of retinal arterioles is diminished in diabetic rats; however, the underlying mechanism(s) of this phenomenon has not been fully elucidated. To determine the role of the polyol pathway in the diabetes-induced retinal vascular dysfunction, we investigated the effect of GP-1447, an inhibitor of aldose reductase, on the attenuation of ACh-induced vasodilation of retinal arterioles seen in diabetic rats. Male Wistar rats were treated with streptozotocin (STZ) and experiments were performed 2 weeks later. The STZ-treated animals were given drinking water containing 5% D-glucose to shorten the term for the development of retinal vascular dysfunction. Treatment with GP-1447 was initiated immediately after STZ treatment and continued throughout the 2-week experimental period. The attenuation of retinal vascular responses to ACh were not modified by treatment with GP-1447, whereas the aldose reductase inhibitor completely prevented diabetes-induced thinning of the retina and sorbitol accumulation in the retina and the lens. These results suggest that mechanisms that are independent of the polyol pathway may contribute to the onset of retinal endothelial dysfunction, although the pathway plays an important role in morphological changes of retina and formation of cataracts in diabetic rats.
- 社団法人 日本薬理学会の論文
著者
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Sakamoto Kenji
Department Of Cardiovascular Medicine Graduate School Of Medical Sciences Kumamoto University
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Sakamoto K
National Inst. Materials Sci. Ibaraki Jpn
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MORI ASAMI
Department of Pediatrics, Shiga University Medical Science
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Nakahara Tsutomu
Department of Molecular Pharmacology, School of Pharmaceutical Sciences, Kitasato University
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Ishii Kunio
Department of Molecular Pharmacology, School of Pharmaceutical Sciences, Kitasato University
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Saigo Orie
Department of Molecular Pharmacology, Kitasato University School of Pharmaceutical Sciences, Japan
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Sakamoto Kenji
Research Institute Of Marine Bioresources Fukuyama University
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Mori Asami
Department Of Pediatrics Shiga University Medical Science
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Nakahara Tsutomu
Department Of Developmental Physiology Institute For Comprehensive Medical Sciences Fujita-gakuen Un
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Sakamoto Kenji
Department Of Advanced Material Science Faculty Of Engineering Kagawa University
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Ishii Kunio
Department Of Molecular Pharmacology Kitasato University School Of Pharmaceutical Sciences
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Saigo Orie
Department Of Molecular Pharmacology Kitasato University School Of Pharmaceutical Sciences
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Mori Asami
Department of Molecular Pharmacology, Kitasato University School of Pharmaceutical Sciences, Japan
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Mori Asami
Department of Molecular Pharmacology, Kitasato University School of Pharmaceutical Sciences
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Sakamoto Kenji
Department of Molecular Pharmacology, Kitasato University School of Pharmaceutical Sciences, Japan
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Nakahara Tsutomu
Department of Molecular Pharmacology, Kitasato University School of Pharmaceutical Sciences, Japan
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