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Genetic variation in the dopamine system is associated with mixed‐strategy decision‐making in patients with Parkinson's disease.

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Title: Genetic variation in the dopamine system is associated with mixed‐strategy decision‐making in patients with Parkinson's disease.
Authors: Parr, Ashley C. (AUTHOR), Riek, Heidi C. (AUTHOR), Coe, Brian C. (AUTHOR), Pari, Giovanna (AUTHOR), Masellis, Mario (AUTHOR), Marras, Connie (AUTHOR), Munoz, Douglas P. (AUTHOR)
Source: European Journal of Neuroscience. Dec2023, Vol. 58 Issue 12, p4523-4544. 22p.
Subjects: Dopamine, Parkinson's disease, Genetic variation, Genetic profile, Single nucleotide polymorphisms, Reinforcement learning
Abstract: Decision‐making during mixed‐strategy games requires flexibly adapting choice strategies in response to others' actions and dynamically tracking outcomes. Such decisions involve diverse cognitive processes, including reinforcement learning, which are affected by disruptions to the striatal dopamine system. We therefore investigated how genetic variation in dopamine function affected mixed‐strategy decision‐making in Parkinson's disease (PD), which involves striatal dopamine pathology. Sixty‐six PD patients (ages 49–85, Hoehn and Yahr Stages 1–3) and 22 healthy controls (ages 54–75) competed in a mixed‐strategy game where successful performance depended on minimizing choice biases (i.e., flexibly adapting choices trial by trial). Participants also completed a fixed‐strategy task that was matched for sensory input, motor outputs and overall reward rate. Factor analyses were used to disentangle cognitive from motor aspects within both tasks. Using a within‐subject, multi‐centre design, patients were examined on and off dopaminergic therapy, and genetic variation was examined via a multilocus genetic profile score representing the additive effects of three single nucleotide polymorphisms (SNPs) that influence dopamine transmission: rs4680 (COMT Val158Met), rs6277 (C957T) and rs907094 (encoding DARPP‐32). PD and control participants displayed comparable mixed‐strategy choice behaviour (overall); however, PD patients with genetic profile scores indicating higher dopamine transmission showed improved performance relative to those with low scores. Exploratory follow‐up tests across individual SNPs revealed better performance in individuals with the C957T polymorphism, reflecting higher striatal D2/D3 receptor density. Importantly, genetic variation modulated cognitive aspects of performance, above and beyond motor function, suggesting that genetic variation in dopamine signalling may underlie individual differences in cognitive function in PD. [ABSTRACT FROM AUTHOR]
Copyright of European Journal of Neuroscience is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: Genetic variation in the dopamine system is associated with mixed‐strategy decision‐making in patients with Parkinson's disease.
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  Data: <searchLink fieldCode="AR" term="%22Parr%2C+Ashley+C%2E%22">Parr, Ashley C.</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Riek%2C+Heidi+C%2E%22">Riek, Heidi C.</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Coe%2C+Brian+C%2E%22">Coe, Brian C.</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Pari%2C+Giovanna%22">Pari, Giovanna</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Masellis%2C+Mario%22">Masellis, Mario</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Marras%2C+Connie%22">Marras, Connie</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Munoz%2C+Douglas+P%2E%22">Munoz, Douglas P.</searchLink> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22European+Journal+of+Neuroscience%22">European Journal of Neuroscience</searchLink>. Dec2023, Vol. 58 Issue 12, p4523-4544. 22p.
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  Data: <searchLink fieldCode="DE" term="%22Dopamine%22">Dopamine</searchLink><br /><searchLink fieldCode="DE" term="%22Parkinson's+disease%22">Parkinson's disease</searchLink><br /><searchLink fieldCode="DE" term="%22Genetic+variation%22">Genetic variation</searchLink><br /><searchLink fieldCode="DE" term="%22Genetic+profile%22">Genetic profile</searchLink><br /><searchLink fieldCode="DE" term="%22Single+nucleotide+polymorphisms%22">Single nucleotide polymorphisms</searchLink><br /><searchLink fieldCode="DE" term="%22Reinforcement+learning%22">Reinforcement learning</searchLink>
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  Label: Abstract
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  Data: Decision‐making during mixed‐strategy games requires flexibly adapting choice strategies in response to others' actions and dynamically tracking outcomes. Such decisions involve diverse cognitive processes, including reinforcement learning, which are affected by disruptions to the striatal dopamine system. We therefore investigated how genetic variation in dopamine function affected mixed‐strategy decision‐making in Parkinson's disease (PD), which involves striatal dopamine pathology. Sixty‐six PD patients (ages 49–85, Hoehn and Yahr Stages 1–3) and 22 healthy controls (ages 54–75) competed in a mixed‐strategy game where successful performance depended on minimizing choice biases (i.e., flexibly adapting choices trial by trial). Participants also completed a fixed‐strategy task that was matched for sensory input, motor outputs and overall reward rate. Factor analyses were used to disentangle cognitive from motor aspects within both tasks. Using a within‐subject, multi‐centre design, patients were examined on and off dopaminergic therapy, and genetic variation was examined via a multilocus genetic profile score representing the additive effects of three single nucleotide polymorphisms (SNPs) that influence dopamine transmission: rs4680 (COMT Val158Met), rs6277 (C957T) and rs907094 (encoding DARPP‐32). PD and control participants displayed comparable mixed‐strategy choice behaviour (overall); however, PD patients with genetic profile scores indicating higher dopamine transmission showed improved performance relative to those with low scores. Exploratory follow‐up tests across individual SNPs revealed better performance in individuals with the C957T polymorphism, reflecting higher striatal D2/D3 receptor density. Importantly, genetic variation modulated cognitive aspects of performance, above and beyond motor function, suggesting that genetic variation in dopamine signalling may underlie individual differences in cognitive function in PD. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of European Journal of Neuroscience is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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              Text: Dec2023
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