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  • 1
    Publication Date: 1978-03-31
    Description: Mouse spinal neurons grown in tissue culture were used to study the electrophysiological pharmacology of the opiate peptide leucine-enkephalin. Enkephalin depressed glutamate-evoked responses in a noncompetitive manner independent of any other effects on membrane properties. The results demonstrate a neuromodulatory action of opiate peptide functionally distinct from the conventional neurotransmitter class of operation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barker, J L -- Neale, J H -- Smith, T G Jr -- Macdonald, R L -- New York, N.Y. -- Science. 1978 Mar 31;199(4336):1451-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/204016" target="_blank"〉PubMed〈/a〉
    Keywords: Cells, Cultured ; Endorphins/*pharmacology ; Enkephalins/antagonists & inhibitors/*pharmacology ; Excitatory Amino Acid Antagonists ; Glutamates/*pharmacology ; Iontophoresis ; Naloxone/pharmacology ; Neurons/*drug effects ; Spinal Cord ; Synapses/*drug effects ; Synaptic Transmission/*drug effects
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 1980-01-11
    Description: Stereoisomers of the barbiturate anesthetic pentobarbital were applied to mouse spinal neurons growing in tissue culture. Intracellular recordings of neuronal membrane properties revealed that the (+) and (-) isomers caused direct changes in membrane potential and conductance on some but not all of the cells tested. The action of the (+) isomer was predominantly excitatory, whereas the (-) isomer produced predominantly inhibitory responses. The (-) isomer was considerably more effective in potentiating inhibitory responses to the transmitter gamma-aminobutyric acid. The results show that pentobarbital has multiple effects on neuronal excitability and demonstrate the presence of stereospecific sites of barbiturate action on central neurons.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Huang, L Y -- Barker, J L -- New York, N.Y. -- Science. 1980 Jan 11;207(4427):195-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7350656" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials/drug effects ; Animals ; Cells, Cultured ; Dose-Response Relationship, Drug ; Electric Conductivity ; Membrane Potentials/drug effects ; Mice ; Neural Inhibition/drug effects ; Neurons/*drug effects ; Pentobarbital/*pharmacology ; Spinal Cord/embryology ; Stereoisomerism ; Structure-Activity Relationship
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
    Publication Date: 1978-05-19
    Description: Barbiturate anesthetics, but not anticonvulsants, abolish the spontaneous activity of cultured spinal cord neurons; directly increase membrane conductance, an effect which is suppressed by the gamma-aminobutyric acid (GABA) antagonists picrotoxin and penicillin; and are more potent than anticonvulsants in augmenting GABA and depressing glutamate responses. Barbiturate anticonvulsants abolish picrotoxin-induced convulsive activity. These results indicate qualitative and quantitative differences between anesthetic and anticonvulsant barbiturates, which may explain their different clinical effects.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Macdonald, R L -- Barker, J L -- New York, N.Y. -- Science. 1978 May 19;200(4343):775-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/205953" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials/drug effects ; Cells, Cultured ; Electric Conductivity ; Glutamates/pharmacology ; Membrane Potentials/drug effects ; Neurons/*drug effects ; Pentobarbital/*pharmacology ; Phenobarbital/*pharmacology ; Picrotoxin/pharmacology ; Receptors, Neurotransmitter/drug effects ; gamma-Aminobutyric Acid/pharmacology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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