PMID- 2877380 OWN - NLM STAT- MEDLINE DCOM- 19861126 LR - 20190701 IS - 0024-3205 (Print) IS - 0024-3205 (Linking) VI - 39 IP - 16 DP - 1986 Oct 20 TI - Spectral and inhibitory interactions of (+/-)-3,4-methylenedioxyamphetamine (MDA) and (+/-)-3,4-methylenedioxymethamphetamine (MDMA) with rat hepatic microsomes. PG - 1457-64 AB - Incubation of racemic methylenedioxyamphetamine (MDA) or methylenedioxymethamphetamine (MDMA) with rat hepatic microsomes, in the presence of NADPH, generated a spectrally observed inhibitory complex with cytochrome P-450. The complex inhibited product formation from MDA and MDMA as well as other P-450 dependent reactions such as benzphetamine demethylation and CO binding. In the absence of NADPH, MDMA and MDA generated type I and type IIa difference spectra, respectively, suggesting differences in their binding to the enzyme active site. The N-demethylation of MDMA was partially inhibited by methimazole suggesting involvement of the hepatic flavin-containing monooxygenase. FAU - Brady, J F AU - Brady JF FAU - Di Stefano, E W AU - Di Stefano EW FAU - Cho, A K AU - Cho AK LA - eng GR - CA9030/CA/NCI NIH HHS/United States GR - DA02411/DA/NIDA NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - Netherlands TA - Life Sci JT - Life sciences JID - 0375521 RN - 0 (Amphetamines) RN - 0M3S43XK27 (Benzphetamine) RN - 44RAL3456C (Methamphetamine) RN - 4764-17-4 (3,4-Methylenedioxyamphetamine) RN - 53-59-8 (NADP) RN - 554Z48XN5E (Methimazole) RN - 9035-51-2 (Cytochrome P-450 Enzyme System) RN - CK833KGX7E (Amphetamine) RN - EC 1.5.- (Oxidoreductases, N-Demethylating) RN - KE1SEN21RM (N-Methyl-3,4-methylenedioxyamphetamine) SB - IM MH - 3,4-Methylenedioxyamphetamine/analogs & derivatives/*metabolism/pharmacology MH - Amphetamine/metabolism MH - Amphetamines/*metabolism MH - Animals MH - Benzphetamine/metabolism MH - Cytochrome P-450 Enzyme System/metabolism MH - Kinetics MH - Male MH - Methamphetamine/metabolism MH - Methimazole/pharmacology MH - Microsomes, Liver/drug effects/*metabolism MH - N-Methyl-3,4-methylenedioxyamphetamine MH - NADP/pharmacology MH - Oxidoreductases, N-Demethylating/antagonists & inhibitors/metabolism MH - Rats MH - Spectrophotometry EDAT- 1986/10/20 00:00 MHDA- 1986/10/20 00:01 CRDT- 1986/10/20 00:00 PHST- 1986/10/20 00:00 [pubmed] PHST- 1986/10/20 00:01 [medline] PHST- 1986/10/20 00:00 [entrez] AID - 0024-3205(86)90551-5 [pii] AID - 10.1016/0024-3205(86)90551-5 [doi] PST - ppublish SO - Life Sci. 1986 Oct 20;39(16):1457-64. doi: 10.1016/0024-3205(86)90551-5.