SDTラットの膵島障害進展におけるマクロファージの役割
スポンサーリンク
概要
- 論文の詳細を見る
Spontaneously diabetic Torii (SDT) rats were established from Sprague-Dawley (SD) rat and are used as an animal model of type 2 diabetes mellitus. In the present study, the mechanism of the development of injury in the pancreas of these rats was examined focusing on the role of monocytes/macrophages. The number of lymphocytes and monocytes in the circulation of SDT rats increased with age, reaching a plateau at around 9 weeks of age and remaining at that level thereafter. The number of leukocytes in SDT rats was almost twice that of wild-type SD rats. Serum IL-18 levels began to increase at 8 weeks of age, forming a prominent peak at 9 weeks of age. In parallel with this, serum levels of NO2/NO3 showed an abrupt rise and decline. Spleen cells prepared from 9-week-old SDT rats expressed high levels of IFN-γ in response to IL-18, while those from 9-week-old wild-type SD rats did not. Immunohistochemical analysis revealed marked infiltration of CD68+ cells in the islets of SDT rats. Treatment of SDT rats with Cl2MDP-liposomes reduced the number of monocytes as well as levels of NO2/NO3 in the circulation. Consistent with this, the number of infiltrated CD68+ cells in the islets was reduced in SDT rats treated with Cl2MDP-liposomes. These results suggest that macrophages are involved in pancreatic islet injury in SDT rats through excess production of NO induced by IL-18 which increases transitorily at around 9 weeks of age.
- 社団法人 日本実験動物学会の論文
著者
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SHINOHARA Masami
Planning and Development Section, CLEA Japan Inc.
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MIYAGAWA JUN-ICHIRO
Division of Diabetes & Metabolism, Internal Medicine, Hyogo College of Medicine
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OKAMURA Haruki
Institute for Advanced Medical Sciences, Hyogo College of Medicine
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Ueda Haruyasu
Institute for Advance Medical Science, Hyogo College of Medicine
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Okamura Haruki
Institute For Advanced Medical Sciences Hyogo College Of Medicine
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Namba Mitsuyoshi
Division Of Diabetes And Metabolism Department Of Internal Medicine Hyogo College Of Medicine
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井野口 千枝
Division of Diabetes and Metabolism, Department of Internal Medicine, Hyogo College of Medicine
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上田 晴康
Institute for Advanced Medical Sciences and the Department of Emergency and Disaster Medicine, Hyogo
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浜口 朋也
Division of Diabetes and Metabolism, Department of Internal Medicine, Hyogo College of Medicine
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INOKUCHI Chie
Division of Diabetes and Metabolism, Department of Internal Medicine, Hyogo College of Medicine
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HAMAGUCHI Tomoya
Division of Diabetes and Metabolism, Department of Internal Medicine, Hyogo College of Medicine
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Shinohara Masami
Planning And Development Section Clea Japan Inc.
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OKAMURA Haruki
Institute for Advanced Medical Sciences and the Department of Emergency and Disaster Medicine, Hyogo College of Medicine
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UEDA Haruyasu
Institute for Advanced Medical Sciences and the Department of Emergency and Disaster Medicine, Hyogo College of Medicine
関連論文
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