An in vivo cholinergic influence on the retention of [3H]noradrenaline in regional brain synaptosomes |
| |
Authors: | H A Campos E Romero L D Fuenmayor D Marcano de Cotte |
| |
Institution: | (1) Department of Pharmacology J. M. Vargas Medical School, Universidad Central de Venezuela, El Marqués, P.O. Box 76359, Caracas, Venezuela;(2) Department of Physiology J. M. Vargas Medical School, Universidad Central de Venezuela, El Marqués, P.O. Box 76359, Caracas, Venezuela |
| |
Abstract: | Rats were intraventricularly (icv) injected with 3H]noradrenaline and the retention of the amine was determined in synaptosomes obtained from cerebral cortex, hypothalamus and brain stem. Previous icv administration of hemicholinium-3, effective enough to markedly decrease brain acetylcholine levels, increased the retention of synaptosomal 3H]noradrenaline in hypothalamus and cerebral cortex; this increased retention did not occur in the brain stem. The increased retention of 3H]noradrenaline, produced by hemicholinium-3, was reversed by a concomitant icv dose of choline, which in turn reversed the decrease of acetylcholine caused by hemicholinium-3. These results are interpreted as brain cholinergic activity having an influence on the turnover of noradrenaline in some brain regions. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|