Abstract
The effects of dietary protein level on fire cucture of rat liver parenchymal cells were studied in correlation with metabolic changes. With a high protein diet, active gluconeogenesis and ureogenesis were associated with a marked increase in the number of mitochondrial profiles in all regions of the hepatic lobule. This mitochondrial proliferation was reflected by a parallel rise in the activity of mitochondrial cytochrome oxidase in liver homogenates, and could be related to elevated glucagonemia Such adaptation might afford an enhanced overall activity of constitutive mitochondrial enzymes and of mitochondrial translocases. Furthermore, the present data may provide a useful model for studies on mitochondrial biogenesis.
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