[The characteristics of the structural-functional state of the erythrocytes from homoiothermic and heterothermic animals during hypothermic storage].

: Haemoglobin leakage and permeability for 86Rb and K ions during storage at normal and hypothermic conditions have been investigated in the erythrocytes of the ground squirrel Citellus undulatus in hibernating, arousing and awake animals, as well as in rats. During hibernation, stabilization of the barrier properties and a decrease in passive ionic permeability of erythrocyte membrane were observed. Preservation of ionic homeostasis of the erythrocytes in hibernating animals is favoured by activation of Na(+)-pump. By means of radioautography of electrophoregrams of the blood serum proteins, appearance of a rapidly labeling low-molecular protein was noted at the beginning of the baut and its disappearance before arousal. The data obtained are discussed in relation to the role of the blood plasma components in modification of erythrocyte membranes in hibernating animals.