The roles of coenzyme Q10 and vitamin E on the peroxidation of human low density lipoprotein subfractions.

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Abstract
The aim of our study was to investigate the relationships between the levels of coenzyme Q10 (CoQ10) and vitamin E and the levels of hydroperoxide in three subfractions of low density lipoproteins (LDL) that were isolated from healthy donors. LDL3, the densest of the three subfractions, has shown statistically significant lower levels of CoQ10 and vitamin E, which were associated with higher hydroperoxide levels when compared with the lighter counterparts. After CoQ10 supplementation, all three LDL subfractions had significantly increased CoQ10 levels. In particular, LDL3 showed the highest CoQ10 increase when compared with LDL1 and LDL2 and was associated with a significant decrease in hydroperoxide level. These results support the hypothesis that the CoQ10 endowment in subfractions of LDL affects their oxidizability, and they have important implications for the treatment of disease.

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