Summary
B-HT 920, a selective DA autoreceptor agonist, reduced motor activity in rats. Chronic, but not acute, treatment with imipramine (IMI) reversed this effect. The mechanism by which chronic IMI reverses the B-HT 920 effect is discussed.
References
Andén N-E, Gabrowska-Andén M (1987) Increased motor activity following combined stimulation of B-HT 920-sensitive and D1 dopamine receptors. Acta Physiol Scand 131: 157–158
Andén N-E, Golembiowska-Nikitin K, Thornström U (1982) Selective stimulation of dopamine and noradrenaline autoreceptors by B-HT920 and B-HT933, respectively. Naunyn-Schmiedebergs Arch Pharmacol 321: 100–104
Chiodo LA, Antelman SM (1980) Repeated tricyclics induce a progressive dopamine autoreceptor subsensitivity independent of daily drug treatment. Nature 287: 451–454
De Montis MG, Devoto P, Gessa GL, Porcella A, Serra G, Tagliamonte A (1989) Selective adenylate cyclase activity increase in the limbic area of long-term imipramine-treated rats. Eur J Pharmacol 180: 169–174
Meltzer TL, Wiley JN, Williams AE, Heffner TG (1988) Evidence for postsynaptic dopamine agonist effects of B-HT920 in the presence of the dopamine D1 agonist SKF38393. Psychopharmacology 95: 329–332
Serra G, Argiolas A, Klimek V, Fadda F, Gessa GL (1979) Chronic treatment with antidepressants prevents the inhibitory effect of small doses of apomorphine on dopamine synthesis and motor activity. Life Sci 25: 415–424
Serra G, Collu M, D'Aquila PS, De Montis GM, Gessa GL (1990) Possible role of dopamine D1 receptor in the behavioural supersensitivity to dopamine agonists induced by chronic treatment with antidepressants. Brain Res 527: 234–243
Spyraki C, Fibiger HC (1981) Behavioural evidence for supersensitivity of postsynaptic dopamine receptors in the mesolimbic system after chronic administration of desipramine. Eur J Pharmacol 74: 195–206
Willner P (1983) Dopamine and depression: a review of recent evidence. III. The effects of antidepressant treatments. Brain Res Rev 6: 237–246
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Serra, G., Collu, M., D'Aquila, P.S. et al. Chronic imipramine “reverses” B-HT 920-induced hypomotility in rats. J. Neural Transmission 84, 237–240 (1991). https://doi.org/10.1007/BF01244974
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DOI: https://doi.org/10.1007/BF01244974