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Nesfatin-1 Injected Intracerebroventricularly Increases Anxiety, Depression-Like Behavior, and Anhedonia in Normal Weight Rats

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Journal Nutrients
Date 2018 Dec 6
PMID 30513901
Citations 5
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Abstract

Nesfatin-1 is a well-established anorexigenic peptide. Recent studies indicated an association between nesfatin-1 and anxiety/depression-like behavior. However, it is unclear whether this effect is retained in obesity. The aim was to investigate the effect of nesfatin-1-the active core of nesfatin-1-on anxiety and depression-like behavior in normal weight (NW) and diet-induced (DIO) obese rats. Male rats were intracerebroventricularly (ICV) cannulated and received nesfatin-1 (0.1, 0.3, or 0.9 nmol/rat) or vehicle 30 min before testing. Nesfatin-1 at a dose of 0.3 nmol reduced sucrose consumption in the sucrose preference test in NW rats compared to vehicle (⁻33%, < 0.05), indicating depression-like/anhedonic behavior. This dose was used for all following experiments. Nesfatin-1 also reduced cookie intake during the novelty-induced hypophagia test (-62%, < 0.05). Moreover, nesfatin-1 reduced the number of entries into the center zone in the open field test (-45%, < 0.01) and the visits of open arms in the elevated zero maze test (-39%, < 0.01) in NW rats indicating anxiety. Interestingly, DIO rats showed no behavioral alterations after the injection of nesfatin-1 ( > 0.05). These results indicate an implication of nesfatin-1 in the mediation of anxiety and depression-like behavior/anhedonia under normal weight conditions, while in DIO rats, a desensitization might occur.

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