Macrophages actively accumulate malonyldialdehyde-modified but not enzymatically oxidized low density lipoprotein

ArticleinMolecular and Cellular Biochemistry 365(1-2):93-8 · February 2012with4 Reads
Impact Factor: 2.39 · DOI: 10.1007/s11010-012-1247-5 · Source: PubMed

    Abstract

    In this study, we show that low density lipoproteins (LDL) from human blood plasma which was oxidized by animal C-15 lipoxygenase is taken up by cultivated human macrophages with the same effectiveness as with non-oxidized (native) LDL. At the same time malonyldialdehyde-modified LDL is captured by cultivated macrophages very actively. Based on differences in catabolism of LDL with various levels of primary and secondary products of free-radical oxidation, it was offered to discriminate between the oxidized LDL itself (lipohydroperoxide-rich LDL) and the LDL that was chemically modified by free-radical oxidation secondary products of aldehyde nature. In this respect, aldehyde-modified but not oxidized (lipohydroperoxide-containing) LDL is atherogenic.