PMID- 17905422 OWN - NLM STAT- MEDLINE DCOM- 20080409 LR - 20211020 IS - 0091-3057 (Print) IS - 0091-3057 (Linking) VI - 88 IP - 3 DP - 2008 Jan TI - Hallucinogen-like effects of N,N-dipropyltryptamine (DPT): possible mediation by serotonin 5-HT1A and 5-HT2A receptors in rodents. PG - 358-65 AB - N,N-dipropyltryptamine (DPT) is a synthetic tryptamine hallucinogen which has been used psychotherapeutically in humans, but has been studied preclinically only rarely. In the present studies, DPT was tested in a drug-elicited head-twitch assay in mice, and in rats trained to discriminate lysergic acid diethylamide (LSD), N,N-dimethyl-4-phosphoryloxytryptamine (psilocybin), or 3,4-methylenedioxymethamphetamine (MDMA). A separate group of rats was also trained to recognize DPT itself as a discriminative stimulus, and in all cases, the behavioral effects of DPT were challenged with the selective serotonin (5-HT)2A antagonist M100907, the 5-HT1A selective antagonist WAY-100635, or their combination. In the head-twitch assay, DPT elicited dose-dependent effects, producing a biphasic dose-effect curve. WAY-100635 produced a parallel rightward shift in the dose-effect curve for head twitches, indicative of surmountable antagonism, but the antagonist effects of M100907 were functionally insurmountable. DPT produced partial to full substitution when tested in rats trained to discriminate LSD, psilocybin or MDMA, and served as a discriminative stimulus. In all cases, the antagonist effects of M100907 were more profound than were those of WAY-100635. DPT is thus active in two rodent models relevant to 5-HT2 agonist activity. The effectiveness with which M100907 antagonizes the behavioral actions of this compound strongly suggest that the 5-HT2A receptor is an important site of action for DPT, but the modulatory actions of WAY-100635 also imply a 5-HT1A-mediated component to the actions of this compound. FAU - Fantegrossi, William E AU - Fantegrossi WE AD - Division of Neuroscience, Yerkes National Primate Research Center, 954 Gatewood Road, Atlanta, GA 30322, USA. wfanteg@emory.edu FAU - Reissig, Chad J AU - Reissig CJ FAU - Katz, Elyse B AU - Katz EB FAU - Yarosh, Haley L AU - Yarosh HL FAU - Rice, Kenner C AU - Rice KC FAU - Winter, Jerrold C AU - Winter JC LA - eng GR - F31 DA016457/DA/NIDA NIH HHS/United States GR - R01 DA003385/DA/NIDA NIH HHS/United States GR - R21 DA020645-02/DA/NIDA NIH HHS/United States GR - R56 DA003385/DA/NIDA NIH HHS/United States GR - R21 DA020645/DA/NIDA NIH HHS/United States GR - DA020645/DA/NIDA NIH HHS/United States GR - DA016457/DA/NIDA NIH HHS/United States GR - DA03385/DA/NIDA NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20070914 PL - United States TA - Pharmacol Biochem Behav JT - Pharmacology, biochemistry, and behavior JID - 0367050 RN - 0 (Fluorobenzenes) RN - 0 (Hallucinogens) RN - 0 (Piperazines) RN - 0 (Piperidines) RN - 0 (Pyridines) RN - 0 (Receptor, Serotonin, 5-HT2A) RN - 0 (Serotonin Antagonists) RN - 0 (Tryptamines) RN - 112692-38-3 (Receptor, Serotonin, 5-HT1A) RN - 2RV7212BP0 (Psilocybin) RN - 61-52-9 (dipropyltryptamine) RN - 71IH826FEG (N-(2-(4-(2-methoxyphenyl)-1-piperazinyl)ethyl)-N-(2-pyridinyl)cyclohexanecarboxamide) RN - 8NA5SWF92O (Lysergic Acid Diethylamide) RN - EW71EE171J (volinanserin) RN - KE1SEN21RM (N-Methyl-3,4-methylenedioxyamphetamine) SB - IM MH - Animals MH - Data Interpretation, Statistical MH - Discrimination Learning/drug effects MH - Dose-Response Relationship, Drug MH - Fluorobenzenes/pharmacology MH - *Hallucinogens MH - Lysergic Acid Diethylamide/pharmacology MH - Male MH - Mice MH - N-Methyl-3,4-methylenedioxyamphetamine/pharmacology MH - Piperazines/pharmacology MH - Piperidines/pharmacology MH - Psilocybin/pharmacology MH - Pyridines/pharmacology MH - Rats MH - Rats, Inbred F344 MH - Receptor, Serotonin, 5-HT1A/*drug effects MH - Receptor, Serotonin, 5-HT2A/*drug effects MH - Serotonin Antagonists/pharmacology MH - Tryptamines/*pharmacology PMC - PMC2322878 MID - NIHMS38656 EDAT- 2007/10/02 09:00 MHDA- 2008/04/10 09:00 PMCR- 2009/01/01 CRDT- 2007/10/02 09:00 PHST- 2007/05/11 00:00 [received] PHST- 2007/09/06 00:00 [revised] PHST- 2007/09/07 00:00 [accepted] PHST- 2007/10/02 09:00 [pubmed] PHST- 2008/04/10 09:00 [medline] PHST- 2007/10/02 09:00 [entrez] PHST- 2009/01/01 00:00 [pmc-release] AID - S0091-3057(07)00289-4 [pii] AID - 10.1016/j.pbb.2007.09.007 [doi] PST - ppublish SO - Pharmacol Biochem Behav. 2008 Jan;88(3):358-65. doi: 10.1016/j.pbb.2007.09.007. Epub 2007 Sep 14.