[Monoamine oxidase activity and brain levels of histamine and polyamines in various extreme exposures].

The activity and kinetic properties of monoaminoxidase, the level of histamine and polyamines are studied under three extreme factors--hyperoxia, hypoxia and cold stress. The similarity of the metabolic responses of the organism to the investigated extreme factors is shown. All studied parameters indicate that the selected regime of hyperoxia has the most negative effect on the organism; hypoxia has the slightest effect and cold stress takes an intermediate position.