Recruitment of N-Type Ca2+ Channels during LTP Enhances Low Release Efficacy of Hippocampal CA1 Perforant Path Synapses

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Recruitment of N-Type Ca2+ Channels during LTP Enhances Low Release Efficacy of Hippocampal CA1 Perforant Path Synapses

The entorhinal cortex provides both direct and indirect inputs to hippocampal CA1 neurons through the perforant path and Schaffer collateral synapses, respectively. Using both two-photon imaging of synaptic vesicle cycling and electrophysiological recordings, we found that the efficacy of transmitter release at perforant path synapses is lower than at Schaffer collateral inputs. This difference...

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Transmitter release at most central synapses depends on multiple types of calcium channels. Identification of the channels mediating GABA release in hippocampus is complicated by the heterogeneity of interneurons. Unitary IPSPs were recorded from pairs of inhibitory and pyramidal cells in hippocampal slice cultures. The N-type channel antagonist omega-conotoxin MVIIA abolished IPSPs generated b...

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Multivesicular release at Schaffer collateral-CA1 hippocampal synapses.

Whether an individual synapse releases single or multiple vesicles of transmitter per action potential is contentious and probably depends on the type of synapse. One possibility is that multivesicular release (MVR) is determined by the instantaneous release probability (Pr) and therefore can be controlled by activity-dependent changes in Pr. We investigated transmitter release across a range o...

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ژورنال

عنوان ژورنال: Neuron

سال: 2009

ISSN: 0896-6273

DOI: 10.1016/j.neuron.2009.07.013