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  • Title: Induction of Fos-like-immunoreactivity in the central extended amygdala by antidepressant drugs.
    Author: Morelli M, Pinna A, Ruiu S, Del Zompo M.
    Journal: Synapse; 1999 Jan; 31(1):1-4. PubMed ID: 10025677.
    Abstract:
    The induction of the early gene c-fos was evaluated through Fos immunohistochemistry in areas belonging to the extended amygdala after acute administration of two antidepressants, citalopram and imipramine. Both citalopram and imipramine at the dose of 5 and 20 mg/kg, respectively, induced Fos-like immunoreactivity (FLI) in the central amygdaloid nucleus, lateral division of the bed nucleus of the stria terminalis (BSTL), and interstitial nucleus of the posterior limb of the anterior commissure (IPAC). The shell of the nucleus accumbens, which forms a continuum with the central extended amygdala, showed a decrease of FLI after administration of either citalopram or imipramine. The mechanism of action and the brain areas affected by antidepressants are still a matter of debate. By showing that the central extended amygdala is a common site of action for two different antidepressant types, these results provide new insight into the mechanism of action of antidepressants.
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