PMID- 23933156 OWN - NLM STAT- MEDLINE DCOM- 20140131 LR - 20211021 IS - 1872-7972 (Electronic) IS - 0304-3940 (Print) IS - 0304-3940 (Linking) VI - 555 DP - 2013 Oct 25 TI - Independent of 5-HT1A receptors, neurons in the paraventricular hypothalamus mediate ACTH responses from MDMA. PG - 42-6 LID - S0304-3940(13)00715-5 [pii] LID - 10.1016/j.neulet.2013.07.053 [doi] AB - Acute and chronic complications from the substituted amphetamine 3,4-methylenedioxymethamphetamine (MDMA) are linked to activation of the hypothalamic-pituitary-adrenal (HPA) axis. How MDMA activates the HPA axis is not known. HPA responses to stress are known to be mediated through the paraventricular (PVH) hypothalamus and to involve serotonin-1a (5-HT1A) receptors. We sought to determine if the PVH and 5-HT1A receptors were also involved in mediating HPA responses to MDMA. Rats were pretreated with either saline or a 5-HT1A antagonist, WAY-100635 (WAY), followed by a systemic dose of MDMA (7.5mg/kg i.v.). Animals pretreated with WAY had significantly lower plasma ACTH concentrations after MDMA. To determine if neurons in the PVH were involved, and if their involvement was mediated by 5-HT1A receptors, rats implanted with guide cannulas targeting the PVH were microinjected with the GABAA receptor agonist muscimol, aCSF, or WAY followed by MDMA. Compared to aCSF, microinjections of muscimol significantly attenuated the MDMA-induced rise in plasma ACTH (126 vs. 588pg/ml, P=<0.01). WAY had no effect. Our data demonstrates that neurons in the PVH, independent of 5-HT1A receptors, mediate ACTH responses to MDMA. CI - Copyright (c) 2013 Elsevier Ireland Ltd. All rights reserved. FAU - Zaretsky, Dmitry V AU - Zaretsky DV AD - Department of Emergency Medicine, Indiana University School of Medicine, Indianapolis, IN 46202, United States. FAU - Zaretskaia, Maria V AU - Zaretskaia MV FAU - Dimicco, Joseph A AU - Dimicco JA FAU - Durant, Pamela J AU - Durant PJ FAU - Ross, Christian T AU - Ross CT FAU - Rusyniak, Daniel E AU - Rusyniak DE LA - eng GR - R01 DA026867/DA/NIDA NIH HHS/United States GR - R01DA026867/DA/NIDA NIH HHS/United States GR - C06 RR015481-010/RR/NCRR NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural DEP - 20130808 PL - Ireland TA - Neurosci Lett JT - Neuroscience letters JID - 7600130 RN - 0 (Piperazines) RN - 0 (Pyridines) RN - 0 (Serotonin 5-HT1 Receptor Antagonists) RN - 0 (Serotonin Agents) RN - 112692-38-3 (Receptor, Serotonin, 5-HT1A) RN - 2763-96-4 (Muscimol) RN - 71IH826FEG (N-(2-(4-(2-methoxyphenyl)-1-piperazinyl)ethyl)-N-(2-pyridinyl)cyclohexanecarboxamide) RN - 9002-60-2 (Adrenocorticotropic Hormone) RN - KE1SEN21RM (N-Methyl-3,4-methylenedioxyamphetamine) SB - IM MH - Adrenocorticotropic Hormone/*blood MH - Animals MH - Male MH - Microinjections MH - Muscimol/pharmacology MH - N-Methyl-3,4-methylenedioxyamphetamine/*pharmacology MH - Neurons/*drug effects/metabolism MH - Paraventricular Hypothalamic Nucleus/*drug effects/metabolism MH - Piperazines/pharmacology MH - Pyridines/pharmacology MH - Rats MH - Rats, Sprague-Dawley MH - Receptor, Serotonin, 5-HT1A/*physiology MH - Serotonin 5-HT1 Receptor Antagonists/pharmacology MH - Serotonin Agents/*pharmacology PMC - PMC3830637 MID - NIHMS514361 OTO - NOTNLM OT - 3,4-methylenedioxymethamphetamine OT - 5-HT1A OT - ACTH OT - Adrenocorticotropic hormone OT - Amphetamine OT - HPA OT - MDMA OT - PVH OT - Paraventricular hypothalamus OT - Serotonin 1a receptors OT - WAY OT - WAY-100635 OT - aCSF OT - adrenocorticotropin releasing hormone OT - artificial cerebrospinal fluid OT - hypothalamic-pituitary-adrenal axis OT - paraventricular hypothalamus OT - serotonin-1a receptors EDAT- 2013/08/13 06:00 MHDA- 2014/02/01 06:00 PMCR- 2014/10/25 CRDT- 2013/08/13 06:00 PHST- 2013/05/13 00:00 [received] PHST- 2013/07/19 00:00 [revised] PHST- 2013/07/30 00:00 [accepted] PHST- 2013/08/13 06:00 [entrez] PHST- 2013/08/13 06:00 [pubmed] PHST- 2014/02/01 06:00 [medline] PHST- 2014/10/25 00:00 [pmc-release] AID - S0304-3940(13)00715-5 [pii] AID - 10.1016/j.neulet.2013.07.053 [doi] PST - ppublish SO - Neurosci Lett. 2013 Oct 25;555:42-6. doi: 10.1016/j.neulet.2013.07.053. Epub 2013 Aug 8.