Induction of mitochondrial aldehyde dehydrogenases in livers of senescent rats.

Senescent rats were administered ethanol by gastric intubation at hourly intervals. After 1 h, there was a rapid increase in the specific activities of two isoenzymes of liver mitochondrial aldehyde dehydrogenase which was sustained for the next 2 h. No further changes were observed during the course of the following 2 h.