PT  - JOURNAL ARTICLE
AU  - Michael B. Gatch
AU  - Michael J. Forster
AU  - Aaron Janowsky
AU  - Amy J. Eshleman
TI  - Abuse Liability Profile of Three Substituted Tryptamines
AID  - 10.1124/jpet.111.179705
DP  - 2011 Jul 01
TA  - Journal of Pharmacology and Experimental Therapeutics
PG  - 280--289
VI  - 338
IP  - 1
4099  - http://jpet.aspetjournals.org/content/338/1/280.short
4100  - http://jpet.aspetjournals.org/content/338/1/280.full
SO  - J Pharmacol Exp Ther2011 Jul 01; 338
AB  - The abuse liability profile of three synthetic hallucinogens, N,N-diisopropyltryptamine (DIPT), 5-N,N-diethyl-5-methoxytryptamine (5-MeO-DET), and 5-methoxy-α-methyltryptamine (5-MeO-AMT), was tested in rats trained to discriminate hallucinogenic and psychostimulant compounds, including cocaine, methamphetamine, 3,4-methylenedioxymethylamphetamine (MDMA), lysergic acid diethylamide (LSD), (−)-2,5-dimethoxy-4-methylamphetamine (DOM), and dimethyltryptamine (DMT). Because abused hallucinogens act at 5-hydroxytryptamine 1A (5-HT1A) and 5-HT2A receptors, and abused psychostimulants act at monoamine transporters, binding and functional activities of DIPT, 5-MeO-DET, and 5-MeO-AMT at these sites were also tested. DIPT fully substituted in rats trained to discriminate DMT (ED50 = 1.71 mg/kg) and DOM (ED50 = 1.94 mg/kg), but produced only 68% LSD-appropriate responding. 5-MeO-DET fully substituted for DMT (ED50 = 0.41 mg/kg) and produced 59% MDMA-appropriate responding. 5-MeO-AMT did not fully substitute for any of the training drugs, but produced 67% LSD-appropriate responding. None of the compounds produced substitution in rats trained to discriminate cocaine or methamphetamine. All three compounds showed activity at 5-HT1A and 5-HT2A receptors as well as blockade of reuptake by the serotonin transporter. In addition, 5-MeO-AMT produced low levels of serotonin release and low potency blockade of dopamine uptake. DIPT, 5-MeO-DET, and 5-MeO-AMT produced behavioral and receptor effects similar to those of abused hallucinogens, but were not similar to those of psychostimulants. DIPT and 5-MeO-DET may have abuse liability similar to known hallucinogens and may be hazardous because high doses produced activity and lethality.