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| Paper IPM / Cognitive / 12823 |
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Nicotine, an active tobacco derived alkaloid, regulates the activity of the neuronal nitric oxide synthase (nNOS) as well as the release of nitric oxide (NO) in the nervous system. Nicotinic acetylcholine receptors and nNOS are abundantly co-expressed in the hippocampal neurons and are found to alter anxiety-like behaviors in rodents. Dorsal hippocampus may be a site for modulation of anxiety. Therefore, in this study, we investigated the possible interactions between nicotine and NO systems of the dorsal hippocampus and the resultant effect on anxiety-like behaviors. The elevated plus-maze (EPM) test has been used to test the anxiety. Intraperitoneal administration of nicotine (0.5 mg/kg) decreased the open arm time percentage (
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