Journal
PHARMACOLOGY BIOCHEMISTRY AND BEHAVIOR
Volume 72, Issue 1-2, Pages 437-441Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0091-3057(02)00708-6
Keywords
anxiety; cimetidine; compound 48/80; light/dark test; mast cell-deficient (W/W) mice; thioperamide
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To clarify the effect of mast cell-derived histamine release in the brain on anxiety, histaminergics-induced anxiety-like behaviors were examined by a light/dark test in mast cell-deficient (W/W-v) and congenetially normal (+/+) mice. In +/+ mice, when cimetidine (an H-2 receptor antagonist) was coadministered with thioperamide (a neuronal histamine releaser acting via inhibition of H-3 autoreceptors) or Compound 48/80 (C48/80, a selective histamine releaser from mast cells), the time spent in the light zone and the number of crossings experimental anxiety was induced by coadministration of thioperamide-cimetidine, but not C48/80-cimetidine. These results suggest that both nonneuronal mast cell-derived histamine and neuronal histamine play an important role in inducing experimental anxiety. (C) 2002 Elsevier Science Inc. All rights reserved.
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