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Science 1 April 1994:
Vol. 264. no. 5155, pp. 107 - 111
DOI: 10.1126/science.7832825

Articles

Science, Vol 264, Issue 5155, 107-111
Copyright © 1994 by American Association for the Advancement of Science


articles

Roles of N-type and Q-type Ca2+ channels in supporting hippocampal synaptic transmission

DB Wheeler, A Randall, and RW Tsien

Department of Molecular and Cellular Physiology, Beckman Center for Molecular and Genetic Medicine, Stanford University School of Medicine, CA 94305.

Several types of calcium channels found in the central nervous system are possible participants in triggering neurotransmitter release. Synaptic transmission between hippocampal CA3 and CA1 neurons was mediated by N-type calcium channels, together with calcium channels whose pharmacology differs from that of L- and P-type channels but resembles that of the Q-type channel encoded by the alpha 1A subunit gene. Blockade of either population of channels strongly increased enhancement of synaptic transmission with repetitive stimuli. Even after complete blockade of N-type channels, transmission was strongly modulated by stimulation of neurotransmitter receptors or protein kinase C. These findings suggest a role for alpha 1A subunits in synaptic transmission and support the idea that neurotransmitter release may depend on multiple types of calcium channels under physiological conditions.


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   Abstract »    Full Text »    PDF »
Differential Occurrence of Reluctant Openings in G-Protein-Inhibited N- and P/Q-Type Calcium Channels.
H. M. Colecraft, P. G. Patil, and D. T. Yue (2000)
J. Gen. Physiol. 115, 175-192
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Developmental Changes in Calcium Channel Types Mediating Central Synaptic Transmission.
S. Iwasaki, A. Momiyama, O. D. Uchitel, and T. Takahashi (2000)
J. Neurosci. 20, 59-65
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Presynaptic Ca2+ Influx at a Mouse Central Synapse with Ca2+ Channel Subunit Mutations.
J. Qian and J. L. Noebels (2000)
J. Neurosci. 20, 163-170
   Abstract »    Full Text »    PDF »
Ablation of P/Q-type Ca2+ channel currents, altered synaptic transmission, and progressive ataxia in mice lacking the alpha 1A-subunit.
K. Jun, E. S. Piedras-Renteria, S. M. Smith, D. B. Wheeler, S. B. Lee, T. G. Lee, H. Chin, M. E. Adams, R. H. Scheller, R. W. Tsien, et al. (1999)
PNAS 96, 15245-15250
   Abstract »    Full Text »    PDF »
Adenosine A1 and Class II Metabotropic Glutamate Receptors Mediate Shared Presynaptic Inhibition of Retinotectal Transmission.
C. Zhang and J. T. Schmidt (1999)
J Neurophysiol 82, 2947-2955
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omega -AgaIVA-Sensitive (P/Q-type) and -Resistant (R-type) High-Voltage-Activated Ba2+ Currents in Embryonic Cockroach Brain Neurons.
P. Benquet, J. L. Guen, G. Dayanithi, Y. Pichon, and F. Tiaho (1999)
J Neurophysiol 82, 2284-2293
   Abstract »    Full Text »    PDF »
An R-Type Ca2+ Current in Neurohypophysial Terminals Preferentially Regulates Oxytocin Secretion.
G. Wang, G. Dayanithi, R. Newcomb, and J. R. Lemos (1999)
J. Neurosci. 19, 9235-9241
   Abstract »    Full Text »    PDF »
Decreased G-Protein-Mediated Regulation and Shift in Calcium Channel Types with Age in Hippocampal Cultures.
E. M. Blalock, N. M. Porter, and P. W. Landfield (1999)
J. Neurosci. 19, 8674-8684
   Abstract »    Full Text »    PDF »
Modulation of Neuronal Voltage-gated Calcium Channels by Farnesol.
J.-B. Roullet, R. L. Spaetgens, T. Burlingame, Z.-P. Feng, and G. W. Zamponi (1999)
J. Biol. Chem. 274, 25439-25446
   Abstract »    Full Text »    PDF »



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