Title

Circadian Variation of Brain Histamine in Goldfish

Document Type

Article

Publication Date

2003

Publication Title

Brain Research Bulletin

Keywords

Circadian variation, Brain histamine, Goldfish

ISSN

0361-9230

Volume

59

Issue/No.

4

First Page

299

Last Page

301

Abstract

Teleosts may make an excellent model to study brain histamine function. Fishes are phylogenetically closer to the basic vertebrate blueprint than higher vertebrates. They appear to have a simpler histaminergic system in terms of central nervous system distribution and, contrary to higher vertebrates, brain histamine appears to be strictly neuronal. In this preliminary study, we examined circadian variation of brain histamine in goldfish, Carassius auratus, as this neurotransmitter correlates with circadian behavior of some mammals. Two groups of juvenile goldfish were held in 24 60L aquaria, six fish per aquarium, on reversed photoperiods; L:D 12:12 with light onset either at 0700 or 1900 h. Fish were sampled every 4 h. At a sampling time, all the fish in a tank were taken; each sampling, for both groups, was done in replicate. Brain histamine was determined by immunoassay. There was a significant circadian variation in histamine on both photoperiod regimes with the highest levels during the photophase. These results support the hypothesis of an early phylogenic role for histamine in vertebrate circadian physiology.

Comments

©2002 Elsevier Science Inc. All rights reserved.

DOI

10.1016/S0361-9230(02)00914-0

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