“…Although a certain number of the results obtained to date remain ambiguous, several reports mentioned differences between control and either ethanol-intoxicated or ethanol-preferring animals, in the noradrenergic (Kiianmaa et al, 1975;Penn et al, 1978;Rossetti et al, 1992), dopaminergic (Myers and Melchior, 1975;Fadda et al, 1980;Rommelspacher et al, 1992) and serotonergic (Myers et al, 1972;Murphy et al, 1982;for review, see Sellers et al, 1992) systems. Particular attention has been paid to the main enzymatic pathway responsible for the degradation of these neurotransmitters, that catalyzed by the enzyme monoamine oxidase (MAO,EC 1.4.3.4; amine:oxygen oxidoreductase (deaminating, flavin-containing)), (Carlsson et al, 1980;Tabakoff et a1, 1985;Faraj et al, 1987).…”