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- W1999568052 abstract "Serotonergic dysfunction has been hypothesized to play an important role in the pathophysiology of alcoholism. However, whether congenital serotonin (5-HT) deficiency leads to increased alcohol consumption or affects ethanol-related behaviors has not been established. Here, we use a transgenic mouse line that expresses a hypofunctional variant of the 5-HT synthesis enzyme, tryptophan hydroxylase 2, to examine the impact of 5-HT deficiency on responses to alcohol. We demonstrate that these 5-HT-deficient transgenic animals (Tph2KI mice) recover their righting reflex more rapidly than wild-type controls following a high dose of ethanol and exhibit blunted locomotor retardation in response to repeated ethanol administration. In addition, compared to WT controls, 5-HT-deficient animals consume significantly more ethanol and exhibit increased preference for ethanol in two-bottle choice tests. Our data also suggest that 5-HT plays a critical role in mediating the effects of ethanol on Akt/GSK3β signaling in the nucleus accumbens. Overall, our results corroborate previous theories regarding the importance of brain 5-HT levels in mediating responsiveness to alcohol and demonstrate, for the first time, that congenital 5-HT deficiency leads to increased ethanol consumption and decreased sensitivity to the sedative-like effects of ethanol, perhaps in part through modulating Akt/GSK3β signaling." @default.
- W1999568052 created "2016-06-24" @default.
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- W1999568052 date "2014-02-01" @default.
- W1999568052 modified "2023-10-16" @default.
- W1999568052 title "Congenital brain serotonin deficiency leads to reduced ethanol sensitivity and increased ethanol consumption in mice" @default.
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- W1999568052 doi "https://doi.org/10.1016/j.neuropharm.2013.09.010" @default.
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