A Simple Method for the Assessment of Macrophage Scavenger Receptor-Ligand Interaction : Adherence of Erythrocytes Coated with Oxidized Low Density Lipoprotein and Modified Albumin to Macrophages
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概要
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A simple method is described for the assessment of the binding of macrophage scavenger receptor and its ligands such as oxidized low density lipoprotein (ox-LDL) and maleylated bovine serum albumin (m-BSA). In this method, the binding of ox-LDL or m-BSA to macrophages is observed as the adherence of erythrocytes precoated with ox-LDL or m-BSA under phase-contrast microscopy. Erythrocytes were coated with native LDL or ox-LDL simply by incubating mouse erythrocytes with LDL. The ox-LDL-coated erythrocytes attached to the monolayer of mouse peritoneal macrophages without phagocytosis at 37℃, while native LDL-coated erythrocytes did not. The extent of the adherence of the ox-LDL-coated erythrocytes to the macrophages was conveniently expressed as the proportion of the macrophages binding the coated erythrocytes. An optimal concentration of ox-LDL for erythrocyte coating giving maximum erythrocyte adherence to macrophages was 10 μg/ml as protein at an erythrocyte concentration of 2%. The binding of the ox-LDL-coated erythrocytes to the macrophages could be inhibited by ligands for scavenger receptor, and reflected the extent of LDL oxidation. Mouse erythrocytes were successfully coated with m-BSA using chromium(III) ion as adsorbent. The m-BSA-coated erythrocytes attached to the macrophages, while native BSA-coated erythrocytes did not. The adherence was inhibitable with ligands for scavenger receptor, and reflected the extent of maleylation. The method would be useful particularly for measurement of the ligand-binding activity of the receptor, and the receptor-binding activity of the ligands.
- 社団法人日本薬学会の論文
- 1994-01-15
著者
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別府 正敏
Tokyo College of Pharmacy
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菊川 清見
Tokyo College of Pharmacy
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別府 正敏
東京薬大 公衆衛生学
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別府 正敏
東京薬科大学
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別府 正敏
東京医科大学 小児科学
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洞 昌千代
Tokyo College of Pharmacy
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Beppu M
Tokyo College Of Pharmacy
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Beppu Masatoshi
School Of Pharmacy Tokyo University Of Pharmacy And Life Sciences
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