title: ATP release from pure cholinergic synaptosomes is not blocked by tetanus toxin.
abstract: Tetanus toxin (TeTx) is a neurotransmission impairing toxin that acts on several neurotransmitter systems. TeTx also inhibits the K+-induced release of acetylcholine (ACh) from synaptosomes isolated from the electric organ of Torpedo. Neither the membrane potential and depolarization, nor the depolarization-induced calcium uptake into cholinergic nerve terminals is modified after TeTx poisoning. On the other hand, it is known that, when cholinergic nerve terminals are stimulated, there is a release of ATP associated with the release of ACh. We have explored the action of TeTx on this co-release, and have found that there is no action of TeTx on the nucleotide release. Thus, TeTx blocks ACh release without modifying ATP release.
mesh_terms: D000109:Acetylcholine / Q000378:metabolism*; D000255:Adenosine Triphosphate / Q000378:metabolism*; D000818:Animals; D002118:Calcium / Q000378:metabolism; D004557:Electric Organ / Q000378:metabolism*; D008564:Membrane Potentials; D011188:Potassium / Q000494:pharmacology; D013574:Synaptosomes / Q000187:drug effects / Q000378:metabolism*; D013744:Tetanus Toxin / Q000494:pharmacology*; D014101:Torpedo / Q000378:metabolism*
chemical_list: D013744:Tetanus Toxin; D000255:Adenosine Triphosphate; D000109:Acetylcholine; D011188:Potassium; D002118:Calcium