Publication Date:
1982-08-20
Description:
Repetitive presynaptic stimulation elicited slow membrane depolarization in neurons of inferior mesenteric ganglia from guinea pigs. This response was not blocked by cholinergic antagonists but was specifically and reversibly inhibited by a substance P analog, (D-Pro2, D-Phe7, D-Trp9)-substance P, which also depressed the depolarization induced by exogenously applied substance P. The atropine-sensitive slow excitatory and slow inhibitory postsynaptic potentials evoked in neurons of rabbit superior cervical ganglia were not affected by the substance P analog. These and previous results provide strong support for the hypothesis that substance P or a closely related peptide is the transmitter mediating the slow depolarization. The latter may represent a sensory input from the gastrointestinal tract to neurons of the prevertebral ganglia.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jiang, Z -- Dun, N J -- Karczmar, A G -- NS15848/NS/NINDS NIH HHS/ -- RR05368/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1982 Aug 20;217(4561):739-41.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6179162" target="_blank"〉PubMed〈/a〉
Keywords:
Action Potentials/drug effects
;
Animals
;
Atropine/pharmacology
;
Digestive System/physiopathology
;
Ganglia, Autonomic/*drug effects
;
Ganglia, Sympathetic/drug effects
;
Gonadotropin-Releasing Hormone/pharmacology
;
Guinea Pigs
;
Membrane Potentials/drug effects
;
Neurotransmitter Agents
;
Peptides/*pharmacology
;
Rabbits
;
Substance P/analogs & derivatives/*physiology
;
Tubocurarine/pharmacology
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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