PMID- 3144655 OWN - NLM STAT- MEDLINE DCOM- 19890209 LR - 20190726 IS - 0028-3908 (Print) IS - 0028-3908 (Linking) VI - 27 IP - 11 DP - 1988 Nov TI - Effects of dopaminergic and serotonergic receptor blockade on neurochemical changes induced by acute administration of methamphetamine and 3,4-methylenedioxymethamphetamine. PG - 1089-96 AB - As dopamine (DA) causes neurochemical changes in the central serotonergic system after an acute injection of methamphetamine, the present study examined the possibility that this response is mediated through dopaminergic receptors. Pretreatment with the DA receptor antagonist, haloperidol, failed to prevent the decreases in the activity of tryptophan hydroxylase and the concentration of serotonin (5-HT) in the frontal cortex, hippocampus and neostriatum 1 hr after a single administration of methamphetamine. Because methamphetamine is also a potent releaser of 5-HT, the possibility that 5-HT receptors mediate the effects of methamphetamine was evaluated. Pretreatment with methiothepin an antagonist of both DA and 5-HT receptors, failed to prevent the decline in activity of tryptophan hydroxylase but did attenuate the decreases in concentrations of 5-HT measured in the frontal cortex and hippocampus. This attenuation is not mediated through 5-HT2 receptors, as ritanserin failed to interfere with the changes induced by methamphetamine. In addition, DA or 5-HT receptors were apparently not involved in the changes in activity of tryptophan hydroxylase and concentrations of 5-HT induced by another analogue of amphetamine, 3,4-methylenedioxymethamphetamine (MDMA). This study suggests different mechanisms are responsible for the acute and long-term changes observed in the central serotonergic system following a single or multiple doses of methamphetamine. FAU - Johnson, M AU - Johnson M AD - Department of Pharmacology and Toxicology, University of Utah, Salt Lake City 84112. FAU - Hanson, G R AU - Hanson GR FAU - Gibb, J W AU - Gibb JW LA - eng GR - DA 00869/DA/NIDA NIH HHS/United States GR - DA 04222/DA/NIDA NIH HHS/United States PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - England TA - Neuropharmacology JT - Neuropharmacology JID - 0236217 RN - 0 (Amphetamines) RN - 0 (Piperidines) RN - 0 (Receptors, Dopamine) RN - 0 (Receptors, Serotonin) RN - 0 (Serotonin Antagonists) RN - 145TFV465S (Ritanserin) RN - 44RAL3456C (Methamphetamine) RN - 4764-17-4 (3,4-Methylenedioxyamphetamine) RN - 55D94103HL (Methiothepin) RN - J6292F8L3D (Haloperidol) SB - IM MH - 3,4-Methylenedioxyamphetamine/administration & dosage/*pharmacology MH - Amphetamines/*pharmacology MH - Animals MH - Haloperidol/pharmacology MH - Male MH - Methamphetamine/administration & dosage/*pharmacology MH - Methiothepin/pharmacology MH - Piperidines/pharmacology MH - Rats MH - Rats, Inbred Strains MH - Receptors, Dopamine/*drug effects/physiology MH - Receptors, Serotonin/*drug effects/physiology MH - Ritanserin MH - Serotonin Antagonists/pharmacology EDAT- 1988/11/01 00:00 MHDA- 1988/11/01 00:01 CRDT- 1988/11/01 00:00 PHST- 1988/11/01 00:00 [pubmed] PHST- 1988/11/01 00:01 [medline] PHST- 1988/11/01 00:00 [entrez] AID - 10.1016/0028-3908(88)90002-0 [doi] PST - ppublish SO - Neuropharmacology. 1988 Nov;27(11):1089-96. doi: 10.1016/0028-3908(88)90002-0.