期刊
PFLUGERS ARCHIV-EUROPEAN JOURNAL OF PHYSIOLOGY
卷 460, 期 6, 页码 975-990出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s00424-010-0872-7
关键词
Transmitter release; GPCRs; Presynaptic receptor; M2R; Synaptic transmission
类别
This review discusses two theories that try to explain mechanisms of control of neurotransmitter release in fast synapses: the Ca2+ hypothesis and the Ca2+ voltage hypothesis. The review summarizes experimental results that are incompatible with predictions from the Ca2+ hypothesis and concludes that Ca2+ is involved in the control of the amount of release but not in the control of the time course of evoked release, i.e., initiation and termination of evoked release. Results summarizing direct effects of changes in membrane potential on the release machinery are then presented. These changes in membrane potential affect the affinity (for the transmitter) of presynaptic autoinhibitory G-protein coupled receptors (GPCRs). The voltage dependence of these GPCRs and their pivotal role in determining the time course of evoked release is discussed.
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