Histamine-mediated acetylcholine release in the guinea-pig ileum.

Abstract

The isometric contraction induced by histamine in guinea-pig ileum longitudinal muscle was biphasic in Krebs ([Ca]: 3.36 mM) but monophasic in Tyrode solution ([Ca]: 1.80 mM). The late phase (histamine: 20-400 nM) was common to the two solutions but the early phase (histamine: 2-20 nM) was observed only in Krebs solution. This early phase could be blocked… (More)

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