Biomedical subjects

V K Firsov

Publications and source records attributed to V K Firsov.

3 recordsLinked to original sources

PubMed1975

[A pharmacologic analysis of several adrenomimetic effects of serotonin].

Contractions of the isolated rat vas deferens in response to the addition of serotonin could be explained by the release of catecholamines from the nerve endings. As shown by the use of D-, M- and T-antagonists of serotonin (LSD-25, indocarb, typindole), symatholytic--bretilium, alpha-adrenolytic--droperidol and imipramine, this effect was not associated with the direct activation of serotonin- and adrenoreactive receptors.

Animals↗

PubMed1975

[Influence of nonakhlazin on adrenergic neurotransmission in the vas deferens of rats].

The effect of a new antianginal drug--nonachlazine on the adrenergic neurotransmission in the isolated rat vas deferens was studied by examining the vas deferens contractions in response to the transmural electric stimulation of the postganglionic sympathetic nerves and addition of noradrenaline (NA) or BaCl2. After the nonachlazine treatment the NA content in the vas deferens was also studied by the spectrofluorometric method. Besides, the effect of the drug on the uptake of the exogenous NA was investigated. Nonachlazine was found to possess some sympatholytic and spasmolytic effect and could block the uptake of the exogenous NA greatly.

Animals↗

PubMedDate not supplied

[Neuromediator content in the synaptic vesicles of rat adrenergic nerves in some pharmacological actions].

Cytochemical electron microscopy was employed to study the content of neurotransmitters in the synaptic vesicles of adrenergic nerve fibers of Vas deferens of the rat following depletion of the meadiator's reserves by tyramine and subsequent accumulation of exogenous norepinephrine. Subject to investigation was also the effect of antidepressants (phthoracizine and imipramine) on the accumulation of exogenous norepinephrine in the synaptic vesicles. Phthoracizine and imipramine (1 and 10 gamma/ml) are shown to block the acculation of norepinephrine in the vesicles, when the mediator is introduced in a concentration of 0,5 gamma/ml, and not to impede this process, if the mediator's concentration is increased to 30 gamma/ml.

Animals↗