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We have investigated the cytotoxic and chemotactic potencies of malondialdehyde (MDA), hexanal, 4-hydroxyhexenal (HHE), 4-hydroxynonenal (HNE) and 4-hydroxyoctenal (HOE), which are aldehydes found in oxidised low density lipoprotein (LDL), for human monocyte-macrophages. They were toxic in the following order: hexanal < HHE = HOE < HNE. HNE was toxic at 20 μM and chemotactic at 2.5 μM. The...
Human monocyte-macrophages were incubated for 24 h with low-density lipoprotein (LDL) which had been previously oxidized for varying periods up to 24 h with copper ions, in the presence or absence of dl-α-tocopherol or probucol. The release of radioactivity from cells preloaded with tritiated adenine was used as an assay of toxicity. Toxicity of oxidized LDL increased with duration of copper oxidation...
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