Abstract
The activity of phosphodiesterase (PDE) of rat cerebral cortex following the administration in vitro and in vivo of various concentrations of neuroleptic phenothiazine drugs and tricyclic antidepressive drugs has been investigated. It has been shown that PDE activity is inhibited by phenothiazine neuroleptic drugs (fluphenazine > trifluperazine > thioproperazine > chlorpromazine = thioridazine). Tricyclic antidepressants nortriptyline, chlorimipramine, protiptyline, imipramine and desipramine at a concentration of 10−3 M caused 60–80% inhibition of PDE activity. It has also been found that the investigated phenothiazine compounds inhibit the high affinity PDE activity more than the PDE activity of low affinity to the substrate.
The results obtained suggest that the mechanism of the neuroleptic action of phenothiazine drugs is partially connected with their influence on cyclic 3′,5′-AMP metabolism.
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Supported by Polish Academy of Sciences, 09.4.1.5.
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Janiec, W., Korczak-Dziuba, K. & Herman, Z.S. Effect of phenothiazine neuroleptic drugs and tricyclic antidepressants on phosphodiesterase activity in rat cerebral cortex. Psychopharmacologia 37, 351–358 (1974). https://doi.org/10.1007/BF00428921
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DOI: https://doi.org/10.1007/BF00428921