[Effect of thyroxin on the functional state of the respiratory chain in liver mitochondria of the carp Cyprinus carpio during acclimatization to changes in water temperature].
It has been demonstrated that oxidative phosphorylation in liver mitochondria of the carps which were kept within a week at 5 and 25 degrees C remains unaffected by the addition of 0.5 micron thyroxin to the incubation medium. Addition of thyroxin (0.5 micron) to mitochondrial suspension prepared from the liver of carps acclimated within a week at 20 and especially 25 degrees C, resulted in uncoupling of respiration and phosphorylation. Daily injections of thyroxin within a week (2 mu kg per 1 g of body weight) to carps at 20 and 25 degrees C resulted in the increase of the rate of non-phosphorylating oxidation and the decrease of oxidative phosphorylation in liver mitochondria. The increase of temperature of water from 5 to 30 degrees C decreases triiodthyronine content of the blood serum in the carp.
D000064:Acclimatization; D000818:Animals; D002347:Carps / Q000378:metabolism / Q000502:physiology*; D003530:Cyprinidae / Q000502:physiology*; D004579:Electron Transport; D008930:Mitochondria, Liver / Q000378:metabolism*; D010085:Oxidative Phosphorylation; D010101:Oxygen Consumption; D013696:Temperature; D013974:Thyroxine / Q000502:physiology*
D013974:Thyroxine
Vliianie tiroksina na funktsional'noe sostoianie dykhatel'noĭ tsepi mitokhondriĭ pecheni karpa Cyprinus carpio pri akklimatsii k izmeneniiu temperatury vodnoĭ sredy.