Cited by 230Neurotransmitter Receptor Influence on BehaviorNeural and Behavioral Psychology StudiesParkinson's Disease Mechanisms and Treatments

Age-related changes in midbrain dopaminergic regulation of the human reward system

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Dreher, Jean-Claude, Meyer-Lindenberg, Andreas, Kohn, Philip, Berman, Karen Faith·2008·Proceedings of the National Academy of Sciences

Abstract

The dopamine system, which plays a crucial role in reward processing, is particularly vulnerable to aging. Significant losses over a normal lifespan have been reported for dopamine receptors and transporters, but very little is known about the neurofunctional consequences of this age-related dopaminergic decline. In animals, a substantial body of data indicates that dopamine activity in the midbrain is tightly associated with reward processing. In humans, although indirect evidence from pharmacological and clinical studies also supports such an association, there has been no direct demonstration of a link between midbrain dopamine and reward-related neural response. Moreover, there are no in vivo data for alterations in this relationship in older humans. Here, by using 6-[(18)F]FluoroDOPA (FDOPA) positron emission tomography (PET) and event-related 3T functional magnetic resonance imaging (fMRI) in the same subjects, we directly demonstrate a link between midbrain dopamine synthesis and reward-related prefrontal activity in humans, show that healthy aging induces functional alterations in the reward system, and identify an age-related change in the direction of the relationship (from a positive to a negative correlation) between midbrain dopamine synthesis and prefrontal activity. These results indicate an age-dependent dopaminergic tuning mechanism for cortical reward processing and provide system-level information about alteration of a key neural circuit in healthy aging. Taken together, our findings provide an important characterization of the interactions between midbrain dopamine function and the reward system in healthy young humans and older subjects, and identify the changes in this regulatory circuit that accompany aging.

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  • The function of the dopaminergic mechanism and the role of polymorphic variation in dopamine genes vary with age, making extrapolation from adult studies difficult.

    “Yet the function of the dopaminergic mechanism and the role of polymorphic variation in dopamine genes vary with age,24,25 making extrapolation from adult studies difficult.”

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Authors
Dreher, J.-C., Meyer-Lindenberg, A., Kohn, P., & Berman, K. F.
Affiliations
  • National Institutes of Health (US)
  • *Section on Integrative Neuroimaging, National Institute of Mental Health, National Institutes of Health, Bethesda, MD 20892
Venue
Proceedings of the National Academy of Sciences
Published
2008-09-30
Volume
105
Issue
39
Pages
15106-15111
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2104072340
Cited by
230
References
49
Citations by year
2026: 8 · 2025: 11 · 2024: 11 · 2023: 8 · 2022: 16 · 2021: 18 · 2020: 8 · 2019: 20 · 2018: 14 · 2017: 14 · 2016: 12 · 2015: 16 · 2014: 15 · 2013: 7 · 2012: 17
FWCI
5.05
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion)
Funders
  • National Institutes of Health
  • National Institute of Mental Health (Z01MH002717)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural and Behavioral Psychology Studies
  • Health Sciences › Medicine › Neurology › Parkinson's Disease Mechanisms and Treatments
Keywords
midbrain dopamine, dopamine synthesis, reward processing, healthy aging, prefrontal cortex, dopaminergic modulation, FDOPA PET, event-related fMRI, age-related decline, reward systems
MeSH terms
Adult, Age Factors, Aged, Aging, Dihydroxyphenylalanine, Dopamine, Female, Humans, Magnetic Resonance Imaging, Male, Mesencephalon, Middle Aged, Reward, Prefrontal Cortex, Positron-Emission Tomography

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