title: Effects of ethanol on adenosine 5'-triphosphate-gated purinergic and 5-hydroxytryptamine receptors.
abstract: This report of the proceedings of a symposium presented at the 2005 annual meeting of the Research Society on Alcoholism highlights the actions of ethanol on purinergic (P2XRs) and 5-hydroxytryptamine3 (5-HT3Rs) receptors. Both P2XRs and 5-HT3Rs, are modulated by pharmacologically relevant concentrations of ethanol, with inhibition or stimulation of P2XR subtypes and stimulation of 5-HT3Rs, respectively. With regard to ethanol-modulatory actions, these 2 distinctly different receptor classes have been studied to a much lesser extent than other LGICs. The organizers and chairs were Daryl L. Davies and Tina K. Machu. John J. Woodward discusses the molecular pharmacology and physiology of P2XRs and 5-HT3Rs and sets the stage for a detailed investigation into the ethanol sensitivity of these channels by the invited speakers. Daryl L. Davies discusses the results from recent electrophysiological studies conducted in his and Dr. Woodward's laboratories, highlighting the actions of ethanol on P2XR subtypes. Jiang-Hong Ye discusses results from recent studies using loose-patch and whole-cell recordings on purinergic receptors expressed on neurons from the ventral tegmental area (VTA) in rats. Tina K. Machu discusses electrophysiological studies conducted in her and Dr. David Lovinger's laboratories on nonpore lining residues of the second transmembrane domain (TM2) of the 5-HT3A receptor. Li Zhang presents data demonstrating that F-actin cytoskeletons play a critical role in 5-HT3 receptor clustering in hippocampal neurons. Collectively, the presentations provided strong evidence that P2X and 5-HT3 receptors are important targets for ethanol action.
authors.affiliation: University of Southern California, Los Angeles, California, USA.
authors.forename: Daryl L
authors.initials: DL
authors.lastname: Davies
authors.forename: Liana
authors.initials: L
authors.lastname: Asatryan
authors.forename: Sacha T
authors.initials: ST
authors.lastname: Kuo
authors.forename: John J
authors.initials: JJ
authors.lastname: Woodward
authors.forename: Brian F
authors.initials: BF
authors.lastname: King
authors.forename: Ronald L
authors.initials: RL
authors.lastname: Alkana
authors.forename: Cheng
authors.initials: C
authors.lastname: Xiao
authors.forename: Jiang Hong
authors.initials: JH
authors.lastname: Ye
authors.forename: Hui
authors.initials: H
authors.lastname: Sun
authors.forename: Li
authors.initials: L
authors.lastname: Zhang
authors.forename: Xiang-Qun
authors.initials: XQ
authors.lastname: Hu
authors.forename: Volodya
authors.initials: V
authors.lastname: Hayrapetyan
authors.forename: David M
authors.initials: DM
authors.lastname: Lovinger
authors.forename: Tina K
authors.initials: TK
authors.lastname: Machu
mesh_terms: D000818:Animals; D001921:Brain / Q000187:drug effects*; D000431:Ethanol / Q000494:pharmacology*; D006624:Hippocampus / Q000187:drug effects; D006801:Humans; D008564:Membrane Potentials / Q000187:drug effects; D009474:Neurons / Q000187:drug effects; D051381:Rats; D018048:Receptors, Purinergic P2 / Q000187:drug effects*; D058469:Receptors, Purinergic P2X; D044406:Receptors, Serotonin, 5-HT3 / Q000187:drug effects*; D013268:Stimulation, Chemical; D017557:Ventral Tegmental Area / Q000187:drug effects
chemical_list: D018048:Receptors, Purinergic P2; D058469:Receptors, Purinergic P2X; D044406:Receptors, Serotonin, 5-HT3; D000431:Ethanol