Release and effects of ATP and its derivatives at cholinergic synapses

Eugene M Silinsky*, Timothy J Searl, Renee S. Redman, Jody K. Hirsh

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

ATP is released from many central and peripheral terminals in a rapid, synchronous manner. It can act both as a neurotransmitter substance and as a neuromodulator in conjunction with a primary neurotransmitter. We begin this perspective by reviewing the evidence for the quantal release of ATP together with acetylcholine (ACh) from motor nerve endings. Next, we discuss the inhibitory effects of adenosine derivatives on presynaptic and postsynaptic membranes at cholinergic synapses. With regard to the presynaptic effects of adenosine, after hydrolysis to adenosine ATP is the mediator of skeletal neuromuscular depression at low frequencies of stimulation. The evidence confirming the suggestion that this inhibitory effect of adenosine at motor nerve endings is mediated downstream of calcium entry is presented. Finally, the data showing the mutually occlusive effects of ATP and ACh at cholinoceptive neurons are summarized and discussed.

Original languageEnglish (US)
Pages (from-to)22-33
Number of pages12
JournalDrug Development Research
Volume52
Issue number1-2
DOIs
StatePublished - May 15 2001

Keywords

  • Neuromuscular junction
  • Nicotinic
  • Purinergic
  • Receptors
  • Synaptic

ASJC Scopus subject areas

  • Drug Discovery
  • Organic Chemistry
  • Pharmacology

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