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. 1975;288(4):427-33.
doi: 10.1007/BF00501287.

Influence of morphine and naloxone on the release of noradrenaline from rat cerebellar cortex slices

H Montel, K Starke, H D Taube

Influence of morphine and naloxone on the release of noradrenaline from rat cerebellar cortex slices

H Montel et al. Naunyn Schmiedebergs Arch Pharmacol. 1975.

Abstract

In slices of rat cerebellar cortex preincubated with (-)-3H-noradrenaline, the influence of morphine and naloxone on the efflux of tritium was investigated. The spontaneous outflow was not changed by 10(-5) M of either morphine or naloxone. On the other hand, morphine caused a concentration-dependent decrease of the overflow of tritium evoked by electrical field stimulation. Naloxone did not change the stimulation-induced overflow, but prevented its inhibition by morphine. It is concluded that morphine, through an action on opiate receptors located on cerebellar noradrenergic neurones, inhibits the secretion of the transmitter in response to nerve impulses.

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