Abstract
To determine the concentration of coenzyme Q10 (CoQ10) in the human retina. Eye tissues were lyophilized and exhaustively extracted with heptane. The extracts were analyzed for CoQ10 by high-performance liquid chromatography (HPLC). The average concentration of CoQ10 in the retina was 42+/-11 nanomoles/g dry retina for donors younger than 30 years of age and 24+/-13 nanomoles/g dry retina for donors older than 80 years of age. The average concentrations of CoQ10 in the choroid was 27+/-16 nanomoles/g dry choroid for donors younger than 30 age and 18+/-11 nanomoles/g dry choroid for donors older than 80. CoQ10 levels in the retina can decline by approximately 40% with age. This decline may have two consequences: a decrease in antioxidant ability and a decrease in the rate of ATP synthesis in the retina and, as such, this decline may be linked to the progression of macular degeneration.
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