title: A presynaptic site of action of substance P and vasoactive intestinal polypeptide on myenteric neurons.
abstract: Substance P, vasoactive intestinal polypeptide, potassium and veratrine stimulated release of acetylcholine from isolated myenteric varicosities of guinea pig small intestine. Only the effect of veratrine was blocked by tetrodotoxin. The neuronal topography and action of these neuropeptides indicate a major cholinergic modulatory role for them in the myenteric plexus.
authors.forename: W M
authors.initials: WM
authors.lastname: Yau
authors.forename: M L
authors.initials: ML
authors.lastname: Youther
authors.forename: P R
authors.initials: PR
authors.lastname: Verdun
mesh_terms: D000109:Acetylcholine / Q000378:metabolism; D000818:Animals; D004347:Drug Interactions; D006168:Guinea Pigs; D066298:In Vitro Techniques; D009197:Myenteric Plexus / Q000187:drug effects* / Q000378:metabolism; D011189:Potassium Chloride / Q000494:pharmacology; D013373:Substance P / Q000494:pharmacology*; D013574:Synaptosomes / Q000378:metabolism; D013779:Tetrodotoxin / Q000494:pharmacology; D014660:Vasoactive Intestinal Peptide / Q000494:pharmacology*; D014702:Veratrine / Q000494:pharmacology
chemical_list: D013373:Substance P; D014660:Vasoactive Intestinal Peptide; D013779:Tetrodotoxin; D011189:Potassium Chloride; D014702:Veratrine; D000109:Acetylcholine