PMID- 2887443 OWN - NLM STAT- MEDLINE DCOM- 19871009 LR - 20190624 IS - 0014-2999 (Print) IS - 0014-2999 (Linking) VI - 138 IP - 3 DP - 1987 Jun 26 TI - [3H]3,4-methylenedioxymethamphetamine (MDMA) interactions with brain membranes and glass fiber filter paper. PG - 439-43 AB - The binding of [3H]3,4-methylenedioxymethamphetamine [( 3H]MDMA) to both rat brain membrane preparations and glass fiber filter papers was analyzed in the present study. Saturation studies indicate that [3H]MDMA binding is saturable and monophasic in both the presence and absence of rat brain membranes. This apparent 'specific' binding of [3H]MDMA in both the presence and absence of brain homogenates was totally eliminated by pretreating glass fiber filter papers with polyethylenimine. Drug competition studies demonstrated that [3H]MDMA binding displays a distinct 'pharmacological' profile in the absence of brain tissue. These data indicate that apparent [3H]MDMA binding to rat brain homogenates results from artifactual of [3H]MDMA to glass fiber filter paper. In addition, uptake of [3H]MDMA into rat brain synaptosomes could not be detected. We conclude the [3H]MDMA has limited usefulness in radioligand binding studies. FAU - Wang, S S AU - Wang SS FAU - Ricaurte, G A AU - Ricaurte GA FAU - Peroutka, S J AU - Peroutka SJ LA - eng GR - NS 12151-12/NS/NINDS NIH HHS/United States GR - NS 23560-01/NS/NINDS NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't 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 - 10028-17-8 (Tritium) RN - 333DO1RDJY (Serotonin) RN - 4764-17-4 (3,4-Methylenedioxyamphetamine) RN - KE1SEN21RM (N-Methyl-3,4-methylenedioxyamphetamine) SB - IM MH - 3,4-Methylenedioxyamphetamine/analogs & derivatives/*metabolism MH - Amphetamines/*metabolism MH - Animals MH - Brain/*metabolism MH - Cell Membrane/metabolism MH - Filtration MH - In Vitro Techniques MH - Kinetics MH - N-Methyl-3,4-methylenedioxyamphetamine MH - Radioligand Assay MH - Rats MH - Serotonin/metabolism MH - Tritium EDAT- 1987/06/26 00:00 MHDA- 1987/06/26 00:01 CRDT- 1987/06/26 00:00 PHST- 1987/06/26 00:00 [pubmed] PHST- 1987/06/26 00:01 [medline] PHST- 1987/06/26 00:00 [entrez] AID - 0014-2999(87)90485-7 [pii] AID - 10.1016/0014-2999(87)90485-7 [doi] PST - ppublish SO - Eur J Pharmacol. 1987 Jun 26;138(3):439-43. doi: 10.1016/0014-2999(87)90485-7.