[Effects of oxygen deficiency on rat brain peptide-hydrolase activity with and without hypothermia].

The effect of acute oxygen deficiency on the rat brain peptide-hydrolases (EC 3.4) activity was studied under conditions of acute hypoxic hypoxia (the pressure in altitude chamber 240 mm Hg) with concomitant hypothermia (--5.8 degree C) and without it. The activity of neutral peptide hydrolases decreases by 29% in rats with hypothermia, in animals with normothermia remains unchanged. The activity of acid peptide hydrolases was the control level. The data obtained are compared with those relative to preservation of the content of soluble proteins under hypoxia with hypothermia.