Effect of aging and acetyl‐l‐carnitine on the activity of cytochrome oxidase and adenine nucleotide translocase in rat heart mitochondria

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Abstract
The effect of aging and treatment with acetyl-l-carnitine on the activity of cytochrome oxidase and adenine nucleotide translocase in rat heart mitochondria was studied. It was found that the activity of both these mitochondrial protein systems was reduced (by around 30%) in aged animals. Treatment of aged rats with acetyl-l-carnitine almost completely reversed this effect. Changes in the mitochondrial cardiolipin content appear to be responsible for these effects of acetyl-l-carnitine.