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Effects on spontaneous motor activity and body temperature of beta-phenylethlamine derivatives injected into the cerebral ventricles in reserpine or reserpine and isocarboxazide pretreated mice were investigated with the following results. 1) Each injection of tyramine (40 mug) and dopamine (40 mug) increased the spontaneous motor activity measured by the photo-cell counters method in reserpinized mice. 2) Each injection of tyramine (40 mug), dopamine (40 mug) and beta-phenylethylamine (40 mug) increased the spontaneous motor activity measured by both the wheel cage and photo-cell counters methods in reserpine and isocarboxazide-pretreated mice, but noradrenaline (20 mug) and isoproterenol (80 mug) did not increase the spontaneous motor activity as determined by both methods. 3) The injection of tyramine (40 and 80 mug), dopamine (10 and 40 mug) and p-octopamine (40 mug) increased the body temperature in reserpine and isocarboxazide pretreated mice. 4) Tyramine, dopamine and p-octopamine caused a marked increase in the body temperature as compared with control injection in reserpine and isocarboxazide-pretreated mice, whereas isoproterenol had no influence on body temperature. Our results suggest that beta-phenylethylamine derivatives have different effects in reserpinized and non-pretreated states.

nihon yakurigaku zasshi/nihon yakurigaku zasshi

Central action of p-phenylethylamine derivatives (4) Effects on spontaneous motor activity and body temperature of, S-phenylethylamine derivatives injected into the cerebral ventricles in reserpine or reserpine and isocarboxazide pretreated mice.