Calcium and Transmitter Release Modulation by Adenosine Derivatives

  • E. M. Silinsky


The currently accepted scheme of evoked transmitter secretion may be summarized as follows (for recent reviews, see [44,46]):

(1) A wave of depolarization (the action potential) invades the nerve terminal and opens voltage-sensitive calcium channels. (2) Extracellular calcium, preequilibrated with the extracellular surface of the nerve terminal membrane, enters the nerve terminal down its concentration gradient through the open calcium channels. (3) Calcium, once near the internal face of the nerve membrane, causes synaptic vesicles with encapsulated neurotransmitter to fuse with the nerve terminal at specific releasing sites. (4) The transmitter contents of the fused vesicles are discharged into the synaptic cleft by exocytosis.


Adenylate Cyclase Adenosine Receptor Extracellular Calcium Transmitter Release Motor Nerve Ending 
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Copyright information

© Plenum Press, New York 1985

Authors and Affiliations

  • E. M. Silinsky
    • 1
  1. 1.Department of PharmacologyNorthwestern University Medical SchoolChicagoUSA

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