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1
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0027318615
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Drosophila melanogaster as a model for study of general anaesthesia: The quantitative response to clinical anaesthetics and alkanes
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Allada R, Nash HA: Drosophila melanogaster as a model for study of general anaesthesia: the quantitative response to clinical anaesthetics and alkanes. Anesth Analg 1993, 77:19-26.
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Anesth Analg
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Allada, R.1
Nash, H.A.2
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2
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Is there a cutoff in anesthetic potency for the normal alkanes?
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Liu J, Laster MJ, Taheri S, Eger EI, Koblin DD, Halsey MJ: Is there a cutoff in anesthetic potency for the normal alkanes? Anesth Analg 1993, 77:12-18.
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Anesth Analg
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Liu, J.1
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Eger, E.I.4
Koblin, D.D.5
Halsey, M.J.6
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0029908253
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Anesthetic and convulsant properties of aromatic compounds and cycloalkanes: Implications for mechanisms of narcosis
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Fang Z, Sonner J, Laster MJ, Ionescu P, Kandel L, Koblin DD, Eger EI, Halsey MJ: Anesthetic and convulsant properties of aromatic compounds and cycloalkanes: implications for mechanisms of narcosis. Anesth Analg 1996, 83:1097-1104. This study was designed to delineate the influence of molecular size, shape and the presence of an aromatic bond on anaesthetic potency and on the Meyer - Overton hypothesis. Sixteen fluorinated and unfluorinated anaesthetic and convulsant compounds were investigated in rats. As molecular size increased so did the deviation from the Meyer-Overton hypothesis. It was concluded that molecular shape and size provide limited clues to the structure of the anaesthetic site of action.
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Anesth Analg
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Fang, Z.1
Sonner, J.2
Laster, M.J.3
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Kandel, L.5
Koblin, D.D.6
Eger, E.I.7
Halsey, M.J.8
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How has molecular pharmacology contributed to our understanding of the mechanism(s) of general anesthesia
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Little HJ: How has molecular pharmacology contributed to our understanding of the mechanism(s) of general anesthesia. Pharmacol Ther 1996, 69:37-58. An excellent review describing how molecular pharmacology has contributed to our understanding of the mechanisms of general anaesthesia. The author emphasizes that most drugs, including anaesthetics, have the ability to produce many different effects. It is highly probable that anaesthesia is produced by drugs acting at multiple sites, which may also include actions on lipids as well as on proteins.
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Pharmacol Ther
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Little, H.J.1
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Muscarinic signalling in the central nervous system
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Durieux ME: Muscarinic signalling in the central nervous system. Anesthesiology 1996, 84:173-189. Recent developments and the anaesthetic implications of muscarinic signalling in the CNS are reviewed. It has become evident that muscarinic signalling plays in important role in the CNS and that anaesthetics interfere with this system. The author provides a summary of the pharmacology and molecular biology of muscarinic receptors, the major functions of this system in the CNS, and interactions of anaesthetics with muscarinic signalling.
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Anesthesiology
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Durieux, M.E.1
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Effects of i.v. anaesthetics on human brain sodium channels
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Drenkel C, Duch DS, Urban BW: Effects of i.v. anaesthetics on human brain sodium channels. Br J Anaesth 1993, 71:15-24.
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Br J Anaesth
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Drenkel, C.1
Duch, D.S.2
Urban, B.W.3
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8
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0029991260
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Central nervous system sodium channels are significantly suppressed at clinical concentrations of volatile anesthetics
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Rehberg B, Xiao Y-H, Duch DS: Central nervous system sodium channels are significantly suppressed at clinical concentrations of volatile anesthetics. Anesthesiology 1996, 84:1223-1233. One of the first studies to show that sodium channel current examined at physiological membrane potentials is significantly blocked by clinical concentrations of volatile anaesthetics. This block will increase the threshold potential needed to fire an action potential, disrupting the flow of information in the CNS and thereby contributing to the clinical state of anaesthesia.
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Anesthesiology
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, pp. 1223-1233
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Rehberg, B.1
Xiao, Y.-H.2
Duch, D.S.3
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9
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Differential effects of gaseous and volatile anaesthetics on sodium and potassium channels
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Urban BW: Differential effects of gaseous and volatile anaesthetics on sodium and potassium channels. Br J Anaesth 1993, 71:25-38.
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Br J Anaesth
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Urban, B.W.1
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0029915821
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Inhibitory effects of ketamine and halothane on recombinant potassium channels from mammalian brain
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+ channels, although their mechanisms of action appear to be different. The inhibition of potassium currents would increase neuronal excitability, possibly activating inhibitory pathways within the brain, thereby contributing to anaesthesia. It is also possible that increased neuronal excitability may contribute to the excitatory phase during induction of anaesthesia.
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Anesthesiology
, vol.84
, pp. 900-909
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Kulkarni, R.S.1
Zorn, L.J.2
Anantharam, V.3
Bayley, H.4
Treistman, S.N.5
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12
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0029741641
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2+ channels in rat cerebrocortical membranes
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2+ channels but do not interact with the verapamil binding site on this channel [13]. With the exception of ketamine, there was a significant correlation between the concentration of anaesthetics producing 25% inhibition of specific binding and serum concentrations found during anaesthesia with these agents, suggesting that the L-type dihydropyridine binding site may be a target for intravenous anaesthetics.
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Br J Anaesth
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, pp. 248-253
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Hirota, K.1
Lambert, D.G.2
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14
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0029861362
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Volatile anesthetics reduce low-voltage-activated calcium currents in a thyroid C-cell line
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McDowell TS, Pancrazio JJ, Lynch C: Volatile anesthetics reduce low-voltage-activated calcium currents in a thyroid C-cell line. Anesthesiology 1996, 85:1167-1175. Inhibition of low-voltage-activated (T-type) calcium channels by volatile anaesthetics will result in widespread effects in the nervous system and could account, at least in part, for many anaesthetic actions, both centrally and peripherally.
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(1996)
Anesthesiology
, vol.85
, pp. 1167-1175
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McDowell, T.S.1
Pancrazio, J.J.2
Lynch, C.3
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Actions of anaesthetics on ligand-gated ion channels: Role of receptor subunit composition
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Harris RA, Mihic SJ, Dildy-Mayfield JE, Machu TK: Actions of anaesthetics on ligand-gated ion channels: role of receptor subunit composition. FASEB J 1995, 9:1454-1462.
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Harris, R.A.1
Mihic, S.J.2
Dildy-Mayfield, J.E.3
Machu, T.K.4
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16
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0029895146
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Effects of inhalational general anaesthetics on native glycine receptors in rat medullary neurones and recombinant glycine receptors in Xenous oocytes
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Downie DL, Hall AC, Lieb WR, Franks NP: Effects of inhalational general anaesthetics on native glycine receptors in rat medullary neurones and recombinant glycine receptors in Xenous oocytes. Br J Pharmacol 1996, 118:493-502. Glycine receptors are sensitive to clinically relevant concentrations of volatile anaesthetics, and effects at these receptors may play some role in the maintenance of the anaesthetic state.
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Br J Pharmacol
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, pp. 493-502
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Downie, D.L.1
Hall, A.C.2
Lieb, W.R.3
Franks, N.P.4
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17
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0027142553
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Spinal cord as a site of anesthetic action
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Kendig J: Spinal cord as a site of anesthetic action. Anesthesiology 1993, 79:1161-1162.
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Kendig, J.1
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0029998806
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A comparison of the effect of halothane on the N-methyl-D-aspartate and non-N-methyl-D-aspartate receptor-mediated excitatory synaptic transmission in the hippocampus
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Narimatsu E, Tsai Y-C, Gerhold TD, Kamath SH, Davies LR, Sokoll MD: A comparison of the effect of halothane on the N-methyl-D-aspartate and non-N-methyl-D-aspartate receptor-mediated excitatory synaptic transmission in the hippocampus. Anesth Analg 1996, 82:843-847. This study showed that NMDA receptors in the rat hippocampus are sensitive to 1 MAC halothane, suggesting that this receptor may be a potential site for the anaesthetic action of this agent.
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Anesth Analg
, vol.82
, pp. 843-847
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Narimatsu, E.1
Tsai, Y.-C.2
Gerhold, T.D.3
Kamath, S.H.4
Davies, L.R.5
Sokoll, M.D.6
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20
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0030007504
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3 receptors: Focus on alcohols and anaesthetic agents
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3 receptor. The clinical implications of activation of these receptors by anaesthetics remains speculative, but may be responsible for the emetic symptoms following recovery from general anaesthesia.
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(1996)
Trends Pharmacol Sci
, vol.17
, pp. 95-99
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Parker, R.M.C.1
Bentley, K.R.2
Barnes, N.M.3
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21
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0028795508
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General anesthetics modify the kinetics of nicotinic acetylcholine receptor desensitization at clinically relevant concentrations
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Raines DE, Rankin SE, Miller KW: General anesthetics modify the kinetics of nicotinic acetylcholine receptor desensitization at clinically relevant concentrations. Anesthesiology 1995, 87:276-287.
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Anesthesiology
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Raines, D.E.1
Rankin, S.E.2
Miller, K.W.3
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0029863348
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Anesthetic and nonanesthetic halogenated volatile compounds have dissimilar activities on nicotinic acetylcholine receptor desensitization kinetics
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Raines DE: Anesthetic and nonanesthetic halogenated volatile compounds have dissimilar activities on nicotinic acetylcholine receptor desensitization kinetics. Anesthesiology 1996, 84:663-671. The actions of anaesthetic and non-anaesthetic halogenated volatile compounds on nAChR desensitization kinetics were compared. At concentrations predicted by the Meyer-Overton rule to be equianaesthetic, isoflurane and enflurane were significantly more effective than the non-anaesthetic compounds at enhancing the fraction of the receptors preexisting in the slow desensitized state and at increasing the apparent rates of agonist-induced fast and slow desensitization. Desensitization of the nAChR may be a useful mechanistic model for studies of general anaesthesia.
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(1996)
Anesthesiology
, vol.84
, pp. 663-671
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Raines, D.E.1
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23
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0028171389
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Potentiation of γ-aminobutyric acid type A receptor-mediated chloride currents by novel halogenated compounds correlate with their ability to induce general anesthesia
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Mihic SJ, McQuilkin SJ, Eger EI, Ionescu P, Harris RA: Potentiation of γ-aminobutyric acid type A receptor-mediated chloride currents by novel halogenated compounds correlate with their ability to induce general anesthesia. Mol Pharmacol 1994, 46:851-857.
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Mihic, S.J.1
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Ionescu, P.4
Harris, R.A.5
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0029865484
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An inhalational anesthetic binding domain in the nicotinic acetylcholine receptor
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Eckenhoff RG: An inhalational anesthetic binding domain in the nicotinic acetylcholine receptor. Proc Natl Acad Sci USA 1996, 93:2807-2810.
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Eckenhoff, R.G.1
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0029866733
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Pontine cholinergic mechanisms modulate the cortical electroencephalographicic spindles of halothane anaesthesia
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Keifer JC, Baghdoyan HA, Lydic R: Pontine cholinergic mechanisms modulate the cortical electroencephalographicic spindles of halothane anaesthesia. Anesthesiology 1996, 84:945-954.
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Anesthesiology
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Keifer, J.C.1
Baghdoyan, H.A.2
Lydic, R.3
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0028852499
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Selective effects of ketamine on amino acid-mediated pathways in neonatal rat spinal cord
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Brockmeyer DM, Kendig JJ: Selective effects of ketamine on amino acid-mediated pathways in neonatal rat spinal cord. Br J Anaesth 1995, 74:79-84.
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Activation of NMDA receptors induces dephosphorylation of DARPP-32 in rat striatal slices
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Stimulation of both dopamine D1 and D2 receptors facilitates in vivo acetylcholine release in the hippocampus
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Imperato, A.1
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Differential effects of ketamine and pentobarbitone on acetylcholine release from the rat hippocampus and striatum
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Sato K, Wu J, Kikuchi T, Wang Y, Watanabe I, Okumura F: Differential effects of ketamine and pentobarbitone on acetylcholine release from the rat hippocampus and striatum. Br J Anaesth 1996, 77:381-384. Ketamine increased acetylcholine release by about 300% in the rat hippocampus but not in the striatum. In contrast phenobarbitone decreased basal acetylcholine release by up to 70% in both sites. These results may underlie the differences between 'dissociative' and depressant anaesthesia.
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Br J Anaesth
, vol.77
, pp. 381-384
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Sato, K.1
Wu, J.2
Kikuchi, T.3
Wang, Y.4
Watanabe, I.5
Okumura, F.6
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Is inhibition of dopamine uptake relevant to the hypnotic action of i.v. anaesthetics?
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Keita H, Lecharny JB, Henzel D, Desmonts JM, Mantz J: Is inhibition of dopamine uptake relevant to the hypnotic action of i.v. anaesthetics? Br J Anaesth 1996, 77:254-256.
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Br J Anaesth
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Keita, H.1
Lecharny, J.B.2
Henzel, D.3
Desmonts, J.M.4
Mantz, J.5
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Biochemical characterization of the stimulatory effects of halothane and propofol on purified brain protein kinase C
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Hemmings HC, Adamo AIB, Hoffman MM: Biochemical characterization of the stimulatory effects of halothane and propofol on purified brain protein kinase C. Anesth Analg 1995, 81:1216-1222.
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Hemmings, H.C.1
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Hoffman, M.M.3
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Activation of endogenous brain protein kinase C by halothane in synaptosomes
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Hemmings HC, Adamo AIB: Activation of endogenous brain protein kinase C by halothane in synaptosomes. Anesthesiology 1996, 84:652-662. PKC is an important intracellular signalling enzyme and a potential target for general anaesthetics. The results of this study demonstrate that halothane, at clinically relevant concentrations, selectively stimulates the activity of this enzyme in rat brain, and this may contribute to the anaesthetic action of halothane.
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Anesthesiology
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, pp. 652-662
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Hemmings, H.C.1
Adamo, A.I.B.2
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Interactions between propofol and lipid mediator receptors: Inhibition of lysophosphatidate signaling
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Rossi MA, Chan CK, Christensen JD, DeGuzman EJ, Durieux ME: Interactions between propofol and lipid mediator receptors: inhibition of lysophosphatidate signaling. Anesth Analg 1996, 83:1090-1096. Clinically relevant concentrations of propofol profoundly inhibited lysophosphatidate signalling through an effect on the lysophosphatidate receptor or its associated G protein. These findins might explain the vasodilatory properties of propofol, since lysophophatidate is a vasoconstrictor, possibly with a role in maintaining vascular tone.
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Anesth Analg
, vol.83
, pp. 1090-1096
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Rossi, M.A.1
Chan, C.K.2
Christensen, J.D.3
DeGuzman, E.J.4
Durieux, M.E.5
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Lysophosphatidic acid alters cerebrovascular reactivity in piglets
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Tigyi G, Hong L, Yakubu M, Parfenova H, Shibata M, Leffler CW: Lysophosphatidic acid alters cerebrovascular reactivity in piglets. Am J Physiol 1995, 268:H2048-H2055.
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Inhalational anesthetic actions on voltage-gated ion channels of bovine adrenal chromaffin cells
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2 in the action of general anaesthetics. Am J Physiol 1996, 270:C636-C644. The results of this study suggest that anaesthetics produce their effect on BK potassium channels by disrupting the phospholipase-arachidonic acid signal transduction pathway. This provides an interesting link between the conflicting descriptions of anaesthetic action, namely the lipid phase theory based on the Meyer-Overton rule and the theory that suggests that anaesthetic actions are the result of interactions with specific receptor sites.
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Am J Physiol
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Johns RA: Nitric oxide, cyclic guanosine monophosphate, and the anesthetic state. Anesthesiology 1996, 85:457-459. A comprehensive review of the possible role of the ubiquitous nitric oxide in the mechanisms of anaesthetic actions.
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Anesthesiology
, vol.85
, pp. 457-459
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Johns, R.A.1
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