[Effect of endogenous oligopeptides and brain-specific proteins on aggressive behavior in the rat].

In experiments on non-bred males of white rats, the effect was studied on their aggressive behaviour of intraventricular injections of brain-specific proteins of S-100 group, gamma-globuline fraction from the serum of rabbits immunized by proteines S-100 (gamma S-100) and non-immunized rabbits (gamma-SNK) as well as of angiotensin, bradikinin and saline. S-100 lowered intermales aggressivity and that connected with pain, and had phasic inhibitory effects on rats emotional reactivity. gamma S-100 increased the aggressivity connected with pain, did not affect the intermales aggressivity and phasically raised (as well as gamma-SNK) the emotional reactivity. gamma-SNK, angiotensin and bradikinin did not change these kinds of aggressivity. None of the administered agents influenced the level of rats predetary aggressivity.