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• W4298112087 endingPage "110651" @default.
• W4298112087 startingPage "110651" @default.
• W4298112087 abstract "Dopamine is a modulating factor in effort-based decision-making, and emerging evidence from pharmacological research suggests that the dopamine D1 receptor is the primary regulator. Given the limited selectivity of pharmacological tools, we further explored this hypothesis using dopamine D1 mutant (DAD1-/-) rats which have a specific genetic reduction in functional D1 receptors. Moreover, given the strong focus on males in neuroscience research in general and in the role of D1 receptors in effort-based learning, we compared both sexes in the present study. Adult male and female DAD1-/- mutant rats and wild type controls were trained to press a lever for a reinforcer. Once trained, subjects completed multiple fixed ratio, progressive ratio, and operant effort-choice (concurrent progressive ratio/chow feeding task [PROG/chow]) experiments. We predicted that DAD1-/- mutant rats would press the lever significantly less than controls across all experiments, have lower breakpoints, and consume more freely available food. As predicted, DAD1-/- mutant rats (regardless of sex) pressed the lever significantly less than controls and had lower breakpoints. Interestingly, there was a sex * genotype interaction for acquisition rates of lever pressing and change in breakpoints with free food available. Only 31% of DAD1-/- mutant males acquired lever pressing while 73% of DAD1-/- mutant females acquired lever pressing. Additionally, DAD1-/- mutant males had significantly larger decreases in breakpoints when free food was available. These findings extend the pharmacological research suggesting that the dopamine D1 receptor modulates decisions based on effort, which has implications for the development of treatment targeting amotivation in neuropsychiatric disorders. The sex * genotype interaction highlights the importance of including both sexes in future research, especially when there are sex differences in incidences and severity of neuropsychiatric disorders." @default.
• W4298112087 created "2022-10-01" @default.
• W4298112087 creator A5006430118 @default.
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• W4298112087 date "2023-01-01" @default.
• W4298112087 modified "2023-09-30" @default.
• W4298112087 title "Dopamine D1 receptor and effort-based decision making in rats: The moderating effect of sex" @default.
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• W4298112087 doi "https://doi.org/10.1016/j.pnpbp.2022.110651" @default.
• W4298112087 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36191805" @default.
• W4298112087 hasPublicationYear "2023" @default.
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