[Myofibrillar protein tropomyosin and allergic cross-reactivity].

Myofibrillar protein tropomyosin (TM) is a normal physiological protein participating in regulation of muscular contraction. It is widely prevalent among living organisms. This explains cross-reactivity of allergic patients to home dust, sea fish, cockroaches, etc.

[Effects of anti-cholinoceptor antibodies on the frog heart].

Research on isolated hearts of Rana temporaria has shown that upon treating them with anti-cholinoreceptor antibodies, there occurs a considerable reduction of inhibition effect on cardiac activity of acetylcholine or carbacholine. A reduction of inhibition effect was noticed after incubation of frog's heart with antibodies against cholinoreceptors obtained from motor-denervated muscles of frogs as well as from muscles of mice Balb/c. Cholinoreceptor protein was obtained and purified by A.

[Effect of anti-cholinoceptor serum on immune rosette formation in mice].

The influence of anti-cholinoceptor antibodies on the process of immune rosette-formation in BALBc mice was studied.

[Effect of antidepressants on the balance of biogenic amines and their metabolites in the rat brain].

A study was made of changes in the balance of neuromediator monoamines and metabolistes in rat brain, induced by a single administration of pyrazidol, imipramine and norzimelidine. It was revealed that pyrazidal in a dose of 50 mg/kg increased the level of noradrenaline (NA) and serotonin (5-HT), particularly in the hypothalamus and raphe-nucleus of rat brain. In the same brain regions, imipramine (30 mg/kg) raised the NA content and lowered the concentration of 5-HT and dopamine (DA) metabolites.

[Analysis of the neurochemical mechanisms of the psychotropic action of tuftsin and its analogs].

A study was made of the central effects of tuftsin (Thr-Lys-Pro-Arg) and its analogs (Leu1-tuftsin, D-Arg4-tuftsin) on the dopamine-dependent behavior and tyrosine hydroxylase (TH) activity. It was shown that the absence of direct effect of tuftsin and Leu1-tuftsin on postsynaptic dopaminergic receptors, revealed in experimental rotational behavior, correlates with a decrease in TH activity in the rat hypothalamus and striatum. Depression of the rotational behavior and increased activity of TH under the effect of D-Arg4-tuftsin suggest that this analog can modulate postsynaptic dopaminergic receptors by the antagonism type.

[Adaptogenic effect of mebikar in emotional stress, physical exertion and hypoxia].

Adaptogenic effect of mebikar was revealed in experiments on cats, mice and rats. The drug was shown to decrease the emotional stress and to completely remove the stupor-like state in cats induced by stress situation and pain stimulation. The drug slightly increased the lifespan of animals under hypoxic hypoxia and raised the limits of maximum tolerable physical load.

[Relation between the nature of psychotropic effects on emotional reactivity and behavior in stress situations and the status of the brain's catecholaminergic systems].

Effects of psychotropic drugs on emotional reactivity and behavior under acute stress were studied in rats with 6-hydroxydopamine (6-HDA)-destroyed catecholaminergic brain terminals. The differences in emotional and behavioral reactivity were found in the group of animals who received 6-HDA. An abrupt reduction of tyrosine hydroxylase activity in corpus striatum of "emotional" rats correlates with noticeable difficulties in the behavior of escape out of stress and essential differences in the effects of psychotropic drugs whose action is mediated via the catecholamine neurotransmitter system.

[Effect of chronic stress on the behavior, bodily condition, and cerebral tyrosine hydroxylase activity of "emotional" and "unemotional" rats].

The relationship between behavior manifestations, somatic alterations and brain tyrosine hydroxylase activity was studied in "emotional" and in "non-emotional" rats exposed to chronic stress. The drastic increase in tyrosine hydroxylase activity in the hypothalamus and striatum after stress correlates with disturbances in behavior, somatic defects (ulcers, erosions) in "emotional" rats as compared with "non-emotional" ones.

[Effect of sodium hydroxybutyrate on the ammonia level in the rat muscles under physical exercise].

The experiments on rats exposed to compulsory swimming have shown the normalizing effect of sodium hydroxybutyrate with respect to one of the biochemical indices of physical overwork: the ammonia level in cross-striated muscles. In control rats who had not received the drug, the swimming induced a significant (more than twofold) increase in the muscle tissue ammonia level, whereas animals preventively treated with sodium hydroxybutyrate (single administration or two-week course) demonstrated no ammonia accumulation. It is suggested that sodium hydroxybutyrate preventing the toxic effect of one of the end products of nitrogen metabolism may reduce afteraction of muscular overwork.