5-Hydroxytryptaminergic control of red pigment-dispersing hormone release in the fiddler crab, Uca pugilator: effects of a 5-hydroxytryptamine uptake inhibitor and a 5-hydroxytryptamine receptor blocker on 5-hydroxytryptamine-induced and iproniazid-induced red pigment dispersion

Hanumante, M.M.; Fingerman, M.

General and Comparative Endocrinology 45(3): 395-401

1981


ISSN/ISBN: 0016-6480
PMID: 6975228
DOI: 10.1016/0016-6480(81)90080-0
Accession: 004544091

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Abstract
The effects of the 5-hydroxytryptamine (5-HT) uptake inhibitor, fluoxetine and the 5-HT receptor blocker, LY53857, on red pigment migration induced by 5-HT and iproniazid in the fiddler crab, U. pugilator, were determined. Fluoxetine potentiated and LY53857 antagonized 5-HT- and iproniazid-induced red pigment dispersion in crabs kept on a white background, the accelerated rate of red pigment dispersion that occurs in iproniazid-injected intact crabs transferred from a white to a black background and the decreased rate of red pigment concentration that occurs in iproniazid-injected intact crabs transferred from a black to a white background. These results are consistent with the hypothesis that 5-HT triggers the release of red pigment-dispersing hormone in U. pugilator.