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- W3124607609 abstract "Studies in human and non-human species suggest that decision-making behaviour can be biased by an affective state, also termed an affective bias. To study these behaviours in non-human species, judgement bias tasks (JBT) have been developed. Animals are trained to associate specific cues (tones) with a positive or negative/less positive outcome. Animals are then presented with intermediate ambiguous cues and affective biases quantified by observing whether animals make more optimistic or more pessimistic choices. Here we use a high versus low reward JBT and test whether pharmacologically distinct compounds, which induce negative biases in learning and memory, have similar effects on decision-making: tetrabenazine (0.0-1.0 mg/kg), retinoic acid (0.0-10.0 mg/kg), and rimonabant (0.0-10.0 mg/kg). We also tested immunomodulatory compounds: interferon-α (0-100 units/kg), lipopolysaccharide (0.0-10.0 μg/kg), and corticosterone (0.0-10.0 mg/kg). We observed no specific effects in the JBT with any acute treatment except corticosterone which induced a negative bias. We have previously observed a similar lack of effect with acute but not chronic psychosocial stress and so next tested decision-making behaviour following chronic interferon-alpha. Animals developed a negative bias which was sustained even after treatment was ended. These data suggest that decision-making behaviour in the task is sensitive to chronic but not acute effects of most pro-depressant drugs or immunomodulators, but the exogenous administration of acute corticosterone induces pessimistic behaviour. This work supports our hypothesis that biases in decision-making develop over a different temporal scale to those seen with learning and memory which may be relevant in the development and perpetuation of mood disorders." @default.
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- W3124607609 date "2021-02-21" @default.
- W3124607609 modified "2023-09-28" @default.
- W3124607609 title "Effects of pro‐depressant and immunomodulatory drugs on biases in decision‐making in the rat judgement bias task" @default.
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- W3124607609 doi "https://doi.org/10.1111/ejn.15127" @default.
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