Experimental Physiology
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Experimental Physiology 76.4 pp 607-610
© The Physiological Society 1991
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Experimental Physiology, Vol 76, Issue 4, 607-610
Copyright © 1991 by The Physiological Society

Article

5-Hydroxytryptamine induces electrogenic secretion and simultaneously activates a modulating inhibitory neural circuit in rat small intestine in vitro

A Beesley and RJ Levin

5-Hydroxytryptamine (5-HT) induces electrogenic secretion across rat jejunum and ileum in vitro expressed as an increase in the short-circuit current. Enhancement of this secretory response by previous serosal addition of atropine (1 microM), hexamethonium (0.2 microM) or yohimbine (0.2 microM), especially in the ileum, indicated that 5-HT simultaneously activates an anti-secretory, inhibitory, enteric, neural, cholinergic-adrenergic pathway (ENCAP). A similar inhibitory ENCAP activated by 5-HT has previously been characterized in rat colon in vitro.




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Copyright © 1991 by the The Physiological Society.