PMID- 2752916 OWN - NLM STAT- MEDLINE DCOM- 19890830 LR - 20190903 IS - 0376-8716 (Print) IS - 0376-8716 (Linking) VI - 23 IP - 3 DP - 1989 Jun TI - P-hydroxy-norephedrine as a possible mediator causing the reduction of oral intake of D-amphetamine in rats. PG - 247-53 AB - In rats D-amphetamine is predominantly metabolized by hydroxylation to p-hydroxy-norephedrine (p-HNE); in guinea pigs, however, by deamination to benzoic acid. After 2-3 days on dosages of 1 mg/kg per day and more rats begin to reduce their oral intake of the stimulant whereas guinea pigs do not. In the present study we examined the hypothesis that the formation of p-HNE in the CNS is partially responsible for this aversion. To determine the elimination of D-amphetamine and the increase in p-HNE, groups of male Wistar rats were given various doses (0.5-5 mg/kg per day) of D-amphetamine in their drinking water intragastrically and intravenously. D-Amphetamine in the brain was determined by radioimmunoassay, p-HNE by high performance liquid chromatography followed by electrochemical detection. In contrast to the concentration of D-amphetamine, the p-HNE-content is independent of the route of administration; after oral treatment it showed a linear increase. The results reveal that p-HNE induces the aversion to the stimulant and that the ratio of D-amphetamine to its metabolite determines the onset of this aversion. No p-HNE was found in the brain of guinea pigs. Guinea pigs do not show any aversion to drinking D-amphetamine solutions, even in high dosages. FAU - Janicke, B AU - Janicke B AD - Department of Neuropsychopharmacology, Free University, Berlin, F.R.G. FAU - Heil, T AU - Heil T FAU - Coper, H AU - Coper H LA - eng PT - Journal Article PL - Ireland TA - Drug Alcohol Depend JT - Drug and alcohol dependence JID - 7513587 RN - 33RU150WUN (Phenylpropanolamine) RN - 552-85-2 (p-Hydroxynorephedrine) RN - TZ47U051FI (Dextroamphetamine) SB - IM MH - Administration, Oral MH - Animals MH - Avoidance Learning/*drug effects MH - Brain/metabolism MH - Dextroamphetamine/*administration & dosage/pharmacokinetics MH - Dose-Response Relationship, Drug MH - Guinea Pigs MH - Male MH - Phenylpropanolamine/*analogs & derivatives MH - Rats MH - Rats, Inbred Strains MH - Self Administration MH - p-Hydroxynorephedrine/*pharmacokinetics EDAT- 1989/06/01 00:00 MHDA- 1989/06/01 00:01 CRDT- 1989/06/01 00:00 PHST- 1989/06/01 00:00 [pubmed] PHST- 1989/06/01 00:01 [medline] PHST- 1989/06/01 00:00 [entrez] AID - 0376-8716(89)90088-4 [pii] AID - 10.1016/0376-8716(89)90088-4 [doi] PST - ppublish SO - Drug Alcohol Depend. 1989 Jun;23(3):247-53. doi: 10.1016/0376-8716(89)90088-4.