BENZOQUINOLIZINE DERIVATIVES - A NEW CLASS OF MONAMINE DECREASING DRUGS WITH PSYCHOTROPIC ACTION
BENZOQUINOLIZINE DERIVATIVES - A NEW CLASS OF MONAMINE DECREASING DRUGS WITH PSYCHOTROPIC ACTION
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DOI:
10.1016/s0074-7742(08)60024-0
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发表时间:
1962-01-01
影响因子:
--
通讯作者:
GEY, KF
中科院分区:
文献类型:
--
作者:
PLETSCHER, A;BROSSI, A;GEY, KF
Chemistry: Among the derivatives of 1,2,3,4,6,7-hexahydro-11bH-benzo[a]quinolizines the ketones (IVb), the secondary carbinols (Va), and the tertiary carbinols (VIa and VIb) show the most interesting biological properties. Drug metabolism: Tetrabenazine has a biological half-life of a few hours, varying according to the organ and the animal species. The drug shows a special affinity for body fat. Two metabolites have been identified. Effect on Monamine Metabolism: Several benzoquinolizines, e.g., tetrabenazine, Ro 4-1284, Ro 4-1632, Ro 4-1860, and Ro 4-1286, decrease the 5-hydroxytryptamine and catechol amine contents preferentially in the brain. Compared to reserpine they are less potent but of shorter duration and faster onset of action. The monamine depression is counteracted by pretreatment with monamine oxidase inhibitors. In brain, tetrabenazine prevents the reserpine-induced decrease of 5-hydroxytryptamine, but not that of norepinephrine. In addition, tetrabenazine increases 5-hydroxyindolylacetic acid in the urine. The effect of benzoquinolizines on monamine metabolism is probably due to an impairment of monamine storing in the tissue. Pharmacology: Monamine-depressing benzoquinolizines influence the central and the autonomic nervous system, e.g., they induce sedation, narcosis potentiation, hypothermia, enhancement of pentylenetetrazole convulsions, decrease of conditioned reflexes, and prevalence of parasympathetic nerve tone. These actions parallel the depression of cerebral monamines and are of shorter duration than those of reserpine. Monamine oxidase inhibitors antagonize or reverse several of these effects. Tetrabenazine prevents the reserpine-induced sedation. Some benzoquinolizine derivatives cause moderate hypotension, probably by central and peripheral mechanisms unrelated to monamine depression in brain and heart The effects of benzoquinolizines on gastrointestinal functions are less pronounced than with reserpine. Clinical effects: Tetrabenazine exerts a sedative action and has beneficial effects on various symptoms of schizophrenia as well as in Huntington''s chorea. The results obtained with the benzoquinolizine support the hypothesis that certain effects on the central nervous system, like sedation, might be mediated through changes in cerebral monamines. 86 references.