Modulation of Presynaptic Transmitter Release by ATP Derived from Postsynaptic Sources

  • D. O. Smith
  • C. A. Lindgren
Part of the Topics in the Neurosciences book series (TNSC, volume 1)

Abstract

Both ATP and adenosine have long been known to be neurotransmitters released from presynaptio cells. However, ATP may also be released from stimulated postsynaptic cells. This has been observed in frog (1) and human (2) muscle as well as Torpedo electric organ (3). Moreover, exogenous ATP has been shown to reduce transmitter release from presynaptic terminals of preganglionic sympathetic neurons (4) and motoneurons (5). Likewise adenosine also depresses synaptic transmission in the central nervous system (6,7). One prime explanation for this phenomenon might be that Ca2+ entry into the terminals is somehow altered. However, this seems unlikely, because the depressant effect is independent of extracellular Ca2+ concentrations (7). Thus, some other mechanism must be involved, and it remains unknown.

Keywords

Sucrose Depression Adenosine Acetylcholine Adenine 

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Copyright information

© Martinus Nijhoff Publishing, Boston 1986

Authors and Affiliations

  • D. O. Smith
  • C. A. Lindgren

There are no affiliations available

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