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  • Title: Cyclic nucleotides and ethanol tolerance and dependence.
    Author: Volicer L, Schmidt WK, Hartz TP, Klosowicz BA, Meichner R.
    Journal: Drug Alcohol Depend; 1979; 4(3-4):295-305. PubMed ID: 230949.
    Abstract:
    Acute ethanol administration decreases cyclic AMP levels in brains of some animal strains. The ethanol-induced decrease of cyclic GMP levels cannot be blocked by intraventricular infusion of calcium but it can be prevented by pretreatment with pyrazole. Although cyclic AMP levels in the cerebral cortex change reciprocally after acute ethanol administration and during withdrawal, the increase observed during withdrawal is probably secondary to some withdrawal processes. Ethanol decreases cerebellar GABA levels only in rats which are stressed prior to sacrifice. Chronic intraventricular infusion of calcium increased the intensity of an acoustic startle response during ethanol withdrawal while EGTA infusion delayed the development of tolerance to the hypothermic effect of ethanol. The ratio of cyclic GMP to GABA levels is postulated to be important for expression of the withdrawal syndrome.
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