Evidence of histamine receptors in fish brain using an in vivo [14C]2-deoxyglucose autoradiographic method and an in vitro receptor-binding autoradiographic method.

Abstract:

:It was hypothesized that fish possess functioning H1 histamine receptors that have the ability to bind agonists and antagonists specific to the H1 histamine receptor subtype. For these experiments, a combination of a novel, in vivo 2-deoxyglucose method and a standard in vitro autoradiography procedure was utilized. A regional, statistically significant dose response in neurological functioning was observed when fish were exposed to histaminergic agents (i.e., H1 agonists and antagonists), which created the first neurological profile for the H1 histamine receptor in fish brain. The H1 histamine receptor was chosen as a characterization receptor in fish because histamine has been linked to a variety of neurological functions such as the control of arousal, attention, sensory processing, and cognition. Histamine also plays a role in pituitary hormone secretion, appetite control, and, potentially, regulation of vestigular reactivity. In addition, the fish brain is well characterized structurally, and the existence of an H3-like receptor has been documented recently in zebrafish. However, to date there is little detailed information about specific localization and functioning of the H1 histamine receptor in fish.

journal_name

Environ Res

journal_title

Environmental research

authors

Choich JA,El-Nabawi A,Silbergeld EK

doi

10.1016/s0013-9351(03)00111-7

subject

Has Abstract

pub_date

2004-01-01 00:00:00

pages

86-93

issue

1

eissn

0013-9351

issn

1096-0953

pii

S0013935103001117

journal_volume

94

pub_type

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