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PubMedDate not supplied

Phototherapy increases platelet 3H-imipramine binding in patients with winter depression.

The density of platelet 3H-imipramine binding sites (Bmax) was investigated in seven inpatients with winter depression before and after incandescent light treatment and in seven healthy volunteers within a 7-day interval without light exposure. A significantly lower mean Bmax value was found in the depressed patients compared to the controls. After light treatment, parallel to a marked clinical improvement, Bmax increased in each patient and reached or even exceeded the mean values of the controls. These results indicate that in patients with winter depression the decreased Bmax value is state-dependent. The incandescent light treatment has beneficial effect in winter depressives and can influence Bmax values.

Adult↗

PubMedDate not supplied

EGYT-2509 a novel neuroleptic agent without extrapyramidal and endocrine side effects.

The dibenzodioxazocine derivative EGYT-2509 was effective in neuropsychopharmacological tests characteristic for neuroleptics and antiparkinsonian drugs. It interacted with dopaminergic compounds similarly to chlorpromazine and haloperidol, but in certain tests it showed different activity. Similarly to chlorpromazine and haloperidol it inhibited the lethal effect of amphetamine in grouped mice. The apomorphine-induced stereotypy was potentiated by lower, and antagonized by higher doses of EGYT-2509. The compound did not show cataleptogenic activity and even antagonized the catalepsy evoked by bulbocapnine. The in vitro potency of EGYT-2509 to block dopamine-mediated inhibition of prolactin release was weaker by three orders of magnitude than that of haloperidol. In preliminary human studies it did not affect the plasma prolactin level. It is concluded that EGYT-2509 is a new potential antipsychotic agent with minimal risk of extrapyramidal and endocrine side effects.

Animals↗