Deletion of the Wolfram syndrome-related gene Wfs1 results in increased sensitivity to ethanol in female mice

Neuropharmacology
Sirli RaudE Vasar

Abstract

Wolfram syndrome, induced by mutation in WFS1 gene, increases risk of developing mood disorders in humans. In mice, Wfs1 deficiency cause higher anxiety-like behaviour and increased response to anxiolytic-like effect of diazepam, a GABAA receptor agonist. As GABAergic system is also target for ethanol, we analysed its anxiolytic-like and sedative properties in Wfs1-deficient mice using elevated plus-maze test and tests measuring locomotor activity and coordination, respectively. Additionally loss of righting reflex test was conducted to study sedative/hypnotic properties of ethanol, ketamine and pentobarbital. To evaluate pharmacokinetics of ethanol in mice enzymatic colour test was used. Finally, gene expression of alpha subunits of GABAA receptors following ethanol treatment was studied by real-time-PCR. Compared to wild-types, Wfs1-deficient mice were more sensitive to ethanol-induced anxiolytic-like effect, but less responsive to impairment of motor coordination. Ethanol and pentobarbital, but not ketamine, caused longer duration of hypnosis in Wfs1-deficient mice. The expression of Gabra2 subunit at 30 minutes after ethanol injection was significantly increased in the frontal cortex of Wfs1-deficient mice as compared to re...Continue Reading

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