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Volume 17, Number 15,
Issue of August 1, 1997
pp. 5858-5867
Copyright ©1997 Society for Neuroscience
Quantitative Ultrastructural Analysis of Hippocampal
Excitatory Synapses
Received March 25, 1997; revised May 5, 1997; accepted May 19, 1997.
Thomas Schikorski and
Charles F. Stevens
Molecular Neurobiology Laboratory and Howard Hughes Medical
Institute, The Salk Institute, La Jolla, California 92037
From three-dimensional reconstructions of CA1 excitatory synapses
in the rodent hippocampus and in culture, we have estimated statistical
distributions of active zone and postsynaptic density (PSD) sizes
(average area ~0.04 µm2), the number of active
zones per bouton (usually one), the number of docked vesicles per
active zone (~10), and the total number of vesicles per bouton
(~200), and we have determined relationships between these
quantities, all of which vary from synapse to synapse but are highly
correlated. These measurements have been related to synaptic
physiology. In particular, we propose that the distribution of active
zone areas can account for the distribution of synaptic release
probabilities and that each active zone constitutes a release site as
identified in the standard quantal theory attributable to .
Key words:
synaptic vesicle;
active zone;
release;
statistical
distribution;
hippocampus;
release probability
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[Abstract]
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Y. Zhao and M. Klein
Modulation of the Readily Releasable Pool of Transmitter and of Excitation-Secretion Coupling by Activity and by Serotonin at Aplysia Sensorimotor Synapses in Culture
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W. J. Tyler, S. P. Perrett, and L. D. Pozzo-Miller
The Role of Neurotrophins in Neurotransmitter Release
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[Abstract]
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S. Karunanithi, L. Marin, K. Wong, and H. L. Atwood
Quantal Size and Variation Determined by Vesicle Size in Normal and Mutant Drosophila Glutamatergic Synapses
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December 1, 2002;
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A. G. Millar, H. Bradacs, M. P. Charlton, and H. L. Atwood
Inverse Relationship between Release Probability and Readily Releasable Vesicles in Depressing and Facilitating Synapses
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November 15, 2002;
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J. F. Wesseling and D. C. Lo
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November 15, 2002;
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D. E. Cabin, K. Shimazu, D. Murphy, N. B. Cole, W. Gottschalk, K. L. McIlwain, B. Orrison, A. Chen, C. E. Ellis, R. Paylor, et al.
Synaptic Vesicle Depletion Correlates with Attenuated Synaptic Responses to Prolonged Repetitive Stimulation in Mice Lacking alpha -Synuclein
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A. Abenavoli, L. Forti, M. Bossi, A. Bergamaschi, A. Villa, and A. Malgaroli
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M. Pennuto, D. Dunlap, A. Contestabile, F. Benfenati, and F. Valtorta
Fluorescence Resonance Energy Transfer Detection of Synaptophysin I and Vesicle-associated Membrane Protein 2 Interactions during Exocytosis from Single Live Synapses
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J. Waters and S. J Smith
Vesicle pool partitioning influences presynaptic diversity and weighting in rat hippocampal synapses
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D. H Brager, M. Capogna, and S. M Thompson
Short-term synaptic plasticity, simulation of nerve terminal dynamics, and the effects of protein kinase C activation in rat hippocampus
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June 1, 2002;
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G. M. G. Shepherd, M. Raastad, and P. Andersen
General and variable features of varicosity spacing along unmyelinated axons in the hippocampus and cerebellum
PNAS,
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F.-M. Lu and K. Kuba
Synchronous and Asynchronous Exocytosis Induced by Subthreshold High K+ at Cs+-Loaded Terminals of Rat Hippocampal Neurons
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Y. Sara, M. G. Mozhayeva, X. Liu, and E. T. Kavalali
Fast Vesicle Recycling Supports Neurotransmission during Sustained Stimulation at Hippocampal Synapses
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M. G. Mozhayeva, Y. Sara, X. Liu, and E. T. Kavalali
Development of Vesicle Pools during Maturation of Hippocampal Synapses
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February 1, 2002;
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V. Scheuss, R. Schneggenburger, and E. Neher
Separation of Presynaptic and Postsynaptic Contributions to Depression by Covariance Analysis of Successive EPSCs at the Calyx of Held Synapse
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February 1, 2002;
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F. W. Hopf, J. Waters, S. Mehta, and S. J. Smith
Stability and Plasticity of Developing Synapses in Hippocampal Neuronal Cultures
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J. S. Diamond
Neuronal Glutamate Transporters Limit Activation of NMDA Receptors by Neurotransmitter Spillover on CA1 Pyramidal Cells
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November 1, 2001;
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A. C. Meyer, E. Neher, and R. Schneggenburger
Estimation of Quantal Size and Number of Functional Active Zones at the Calyx of Held Synapse by Nonstationary EPSC Variance Analysis
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October 15, 2001;
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A.G. M. Leenders, F. H. L. da Silva, W. E.J.M. Ghijsen, and M. Verhage
Rab3A Is Involved in Transport of Synaptic Vesicles to the Active Zone in Mouse Brain Nerve Terminals
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M. A. Xu-Friedman, K. M. Harris, and W. G. Regehr
Three-Dimensional Comparison of Ultrastructural Characteristics at Depressing and Facilitating Synapses onto Cerebellar Purkinje Cells
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September 1, 2001;
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J. Pamidimukkala and M. Hay
Frequency dependence of endocytosis in aortic baroreceptor neurons and role of group III mGluRs
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W. J. Tyler and L. D. Pozzo-Miller
BDNF Enhances Quantal Neurotransmitter Release and Increases the Number of Docked Vesicles at the Active Zones of Hippocampal Excitatory Synapses
J. Neurosci.,
June 15, 2001;
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J. R. Mellor and A. D. Randall
Synaptically Released Neurotransmitter Fails to Desensitize Postsynaptic GABAA Receptors in Cerebellar Cultures
J Neurophysiol,
May 1, 2001;
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E. Hanse and B. Gustafsson
Vesicle release probability and pre-primed pool at glutamatergic synapses in area CA1 of the rat neonatal hippocampus
J. Physiol.,
March 1, 2001;
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E. M. Ullian, S. K. Sapperstein, K. S. Christopherson, and B. A. Barres
Control of Synapse Number by Glia
Science,
January 26, 2001;
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K. C. Rowland, N. K. Irby, and G. A. Spirou
Specialized Synapse-Associated Structures within the Calyx of Held
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December 15, 2000;
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M. E. Kriebel, B. Keller, J. Holsapple, G. Q. Fox, and G. D. Pappas
Porocytosis: Fusion Pore Array Secretion of Neurotransmitter
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December 1, 2000;
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[Abstract]
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V. Matveev and X.-J. Wang
Differential Short-term Synaptic Plasticity and Transmission of Complex Spike Trains: to Depress or to Facilitate?
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November 1, 2000;
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J. Waters and S. J Smith
Phorbol Esters Potentiate Evoked and Spontaneous Release by Different Presynaptic Mechanisms
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November 1, 2000;
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