PMID- 2570704 OWN - NLM STAT- MEDLINE DCOM- 19891018 LR - 20190624 IS - 0014-2999 (Print) IS - 0014-2999 (Linking) VI - 165 IP - 2-3 DP - 1989 Jun 20 TI - Effect of MK-801 on the decrease in tryptophan hydroxylase induced by methamphetamine and its methylenedioxy analog. PG - 315-8 AB - The role of N-methyl-D-aspartate (NMDA) receptors in the decrease in neostriatal tryptophan hydroxylase (TPH) activity induced by repeated high doses of methamphetamine or 3,4-methylenedioxymethamphetamine (MDMA) was evaluated. Rats received 4 injections of methamphetamine (15 mg/kg) or MDMA (10 mg/kg) at 6 h intervals, and were killed 18-20 h after the last administration. These treatments with methamphetamine or MDMA reduced neostriatal TPH activity to 26 and 34% of control, respectively. Coadministration of MK-801 (2.5 mg/kg) significantly attenuated the methamphetamine-induced decrease in TPH activity (66% of control), but did not alter the effect of MDMA. This study suggests that excitatory amino acids may participate in the methamphetamine-induced decline in central TPH activity, and that the mechanism by which MDMA and methamphetamine decreases TPH activity may differ. 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 04221/DA/NIDA NIH HHS/United States GR - MH 44454/MH/NIMH NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - Netherlands TA - Eur J Pharmacol JT - European journal of pharmacology JID - 1254354 RN - 0 (Amphetamines) RN - 0 (Anticonvulsants) RN - 0 (Dibenzocycloheptenes) RN - 0 (Receptors, N-Methyl-D-Aspartate) RN - 0 (Receptors, Neurotransmitter) RN - 44RAL3456C (Methamphetamine) RN - 4764-17-4 (3,4-Methylenedioxyamphetamine) RN - 6LR8C1B66Q (Dizocilpine Maleate) RN - EC 1.14.16.4 (Tryptophan Hydroxylase) RN - KE1SEN21RM (N-Methyl-3,4-methylenedioxyamphetamine) SB - IM MH - 3,4-Methylenedioxyamphetamine/analogs & derivatives/*pharmacology MH - Amphetamines/*pharmacology MH - Animals MH - Anticonvulsants/*pharmacology MH - Dibenzocycloheptenes/*pharmacology MH - Dizocilpine Maleate MH - Male MH - Methamphetamine/*pharmacology MH - N-Methyl-3,4-methylenedioxyamphetamine MH - Rats MH - Rats, Inbred Strains MH - Receptors, N-Methyl-D-Aspartate MH - Receptors, Neurotransmitter/metabolism MH - Tryptophan Hydroxylase/antagonists & inhibitors/*metabolism EDAT- 1989/06/20 00:00 MHDA- 1989/06/20 00:01 CRDT- 1989/06/20 00:00 PHST- 1989/06/20 00:00 [pubmed] PHST- 1989/06/20 00:01 [medline] PHST- 1989/06/20 00:00 [entrez] AID - 0014-2999(89)90728-0 [pii] AID - 10.1016/0014-2999(89)90728-0 [doi] PST - ppublish SO - Eur J Pharmacol. 1989 Jun 20;165(2-3):315-8. doi: 10.1016/0014-2999(89)90728-0.