Martti Maimets

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Nocodazole is a known destabiliser of microtubule dynamics and arrests cell-cycle at the G2/M phase. In the context of the human embryonic stem cell (hESC) it is important to understand how this arrest influences the pluripotency of cells. Here we report for the first time the changes in the expression of transcription markers Nanog and Oct4 as well as(More)
The motor depressant effects of caerulein and N-propylnorapomorphine (NPA) were compared in male mice. Caerulein (1-50 micrograms/kg SC) in a dose dependent manner depressed the exploratory activity, whereas NPA in lower doses (0.5-10 micrograms/kg SC) decreased the motor activity, but in higher doses (over 50 micrograms/kg) had stimulating effect on the(More)
The experiments on male mice and rats have revealed reversed behavioral effects of muscimol and Ro 15-1788 after 15 days of haloperidol (0.25 mg/kg, twice daily) treatment. Muscimol (0.75 mg/kg), which depressed motor activity in saline-pretreated mice, stimulated it after discontinuation of long-term haloperidol administration. Ro 15-1788 stimulating(More)
It has been established in experiments on white male rats that prolonged administration (twice a day for 14 days) of haloperidol (0.25 mg/kg) and pyreneperone (0.25 mg/kg) resulted in the reduced interaction between 3H-spiroperidol and low affinity binding sites for apomorphine in subcortical structures, whereas 3H-spiroperidol binding with high affinity(More)
The effects of haloperidol, a typical neuroleptic, and pirenperone, a selective blocker of serotonin-2-receptors, were studied and compared. Acute administration of haloperidol had effects mainly in dopaminergic models, whereas pirenperone was active only in serotoninergic models. Chronic administration of both drugs made the systems indicated(More)
Quipazine and pirenperone , the drugs interacting with serotonin2 -receptors, more readily displaced 3H-spiroperidol from its binding sites in the frontal cortex than in the striatum. Pirenperone (0,07-0,3 mg/kg), antagonist of serotonin2 -receptors, selectively decreased the intensity of apomorphine aggressiveness. The antiaggressive action of haloperidol(More)
Imidazobenzodiazepine (Ro 15-1788, 5 mg/kg) similarly to a lose dose of apomorphine (0.1 mg/kg) decreased the intensity of footshock aggression in male rats. Ro 15-1788 significantly potentiated the antiaggressive action of apomorphine. Pirenperone (0.01 mg/kg) potentiated the effect of both drugs, whereas haloperidol (0.01 mg/kg) had an opposite action.(More)
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