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Papenberg G, Karalija N, Johansson J, Andersson M, Axelsson J, Riklund K, Lindenberger U, Nyberg L, Bäckman L. The influence of hippocampal dopamine D2 receptor losses on episodic-memory decline across 5 years is moderated by BDNF and KIBRA polymorphisms. Cortex 2024; 176:53-61. [PMID: 38749085 DOI: 10.1016/j.cortex.2024.01.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 12/01/2023] [Accepted: 01/16/2024] [Indexed: 06/11/2024]
Abstract
Losses in dopamine (DA) functioning may contribute to aging-related decline in cognition. Hippocampal DA is necessary for successful episodic memory formation. Previously, we reported that higher DA D2 receptor (D2DR) availability in hippocampus is beneficial for episodic memory only in older carriers of more advantageous genotypes of well-established plasticity-related genetic variations, the brain-derived neurotrophic factor (BDNF, rs6265) and the kidney and brain expressed protein (KIBRA, rs17070145) polymorphisms. Extending our observations to the longitudinal level, the current data show that individuals with one or no beneficial BDNF and KIBRA genotype (n = 80) decline more in episodic memory across five years, without any contribution of losses in hippocampal D2DR availability to memory decline. Although carriers of two beneficial genotypes (n = 39) did not decline overall in episodic memory, losses of hippocampal D2DR availability were predictive of episodic-memory decline among these individuals. Our findings have implications for interventions targeting DA modulation to enhance episodic memory in aging, which may not benefit all older individuals.
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Affiliation(s)
- Goran Papenberg
- Aging Research Center, Karolinska Institutet and Stockholm University, Stockholm, Sweden.
| | - Nina Karalija
- Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden; Department of Medical and Translational Biology, Umeå University, Umeå, Sweden
| | - Jarkko Johansson
- Department of Diagnostics and Intervention, Umeå University, Umeå, Sweden; Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden
| | - Micael Andersson
- Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden; Department of Medical and Translational Biology, Umeå University, Umeå, Sweden
| | - Jan Axelsson
- Department of Diagnostics and Intervention, Umeå University, Umeå, Sweden; Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden
| | - Katrine Riklund
- Department of Diagnostics and Intervention, Umeå University, Umeå, Sweden; Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden
| | - Ulman Lindenberger
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Berlin, Germany; Max Planck UCL Centre for Computational Psychiatry and Ageing Research, Berlin, Germany
| | - Lars Nyberg
- Department of Diagnostics and Intervention, Umeå University, Umeå, Sweden; Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden; Department of Medical and Translational Biology, Umeå University, Umeå, Sweden
| | - Lars Bäckman
- Aging Research Center, Karolinska Institutet and Stockholm University, Stockholm, Sweden
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Lauretani F, Giallauria F, Testa C, Zinni C, Lorenzi B, Zucchini I, Salvi M, Napoli R, Maggio MG. Dopamine Pharmacodynamics: New Insights. Int J Mol Sci 2024; 25:5293. [PMID: 38791331 PMCID: PMC11121567 DOI: 10.3390/ijms25105293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2024] [Revised: 05/04/2024] [Accepted: 05/07/2024] [Indexed: 05/26/2024] Open
Abstract
Dopamine is a key neurotransmitter involved in physiological processes such as motor control, motivation, reward, cognitive function, and maternal and reproductive behaviors. Therefore, dysfunctions of the dopaminergic system are related to a plethora of human diseases. Dopamine, via different circuitries implicated in compulsive behavior, reward, and habit formation, also represents a key player in substance use disorder and the formation and perpetuation of mechanisms leading to addiction. Here, we propose dopamine as a model not only of neurotransmission but also of neuromodulation capable of modifying neuronal architecture. Abuse of substances like methamphetamine, cocaine, and alcohol and their consumption over time can induce changes in neuronal activities. These modifications lead to synaptic plasticity and finally to morphological and functional changes, starting from maladaptive neuro-modulation and ending in neurodegeneration.
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Affiliation(s)
- Fulvio Lauretani
- Geriatric Clinic Unit, Geriatric-Rehabilitation Department, University Hospital, 43126 Parma, Italy; (C.T.); (C.Z.); (B.L.); (I.Z.); (M.S.); (M.G.M.)
- Cognitive and Motor Center, Medicine and Geriatric-Rehabilitation Department of Parma, University-Hospital of Parma, 43126 Parma, Italy
| | - Francesco Giallauria
- Department of Translational Medical Sciences, “Federico II” University of Naples, via S. Pansini 5, 80131 Naples, Italy; (F.G.); (R.N.)
| | - Crescenzo Testa
- Geriatric Clinic Unit, Geriatric-Rehabilitation Department, University Hospital, 43126 Parma, Italy; (C.T.); (C.Z.); (B.L.); (I.Z.); (M.S.); (M.G.M.)
| | - Claudia Zinni
- Geriatric Clinic Unit, Geriatric-Rehabilitation Department, University Hospital, 43126 Parma, Italy; (C.T.); (C.Z.); (B.L.); (I.Z.); (M.S.); (M.G.M.)
| | - Beatrice Lorenzi
- Geriatric Clinic Unit, Geriatric-Rehabilitation Department, University Hospital, 43126 Parma, Italy; (C.T.); (C.Z.); (B.L.); (I.Z.); (M.S.); (M.G.M.)
| | - Irene Zucchini
- Geriatric Clinic Unit, Geriatric-Rehabilitation Department, University Hospital, 43126 Parma, Italy; (C.T.); (C.Z.); (B.L.); (I.Z.); (M.S.); (M.G.M.)
| | - Marco Salvi
- Geriatric Clinic Unit, Geriatric-Rehabilitation Department, University Hospital, 43126 Parma, Italy; (C.T.); (C.Z.); (B.L.); (I.Z.); (M.S.); (M.G.M.)
| | - Raffaele Napoli
- Department of Translational Medical Sciences, “Federico II” University of Naples, via S. Pansini 5, 80131 Naples, Italy; (F.G.); (R.N.)
| | - Marcello Giuseppe Maggio
- Geriatric Clinic Unit, Geriatric-Rehabilitation Department, University Hospital, 43126 Parma, Italy; (C.T.); (C.Z.); (B.L.); (I.Z.); (M.S.); (M.G.M.)
- Cognitive and Motor Center, Medicine and Geriatric-Rehabilitation Department of Parma, University-Hospital of Parma, 43126 Parma, Italy
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3
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Karalija N, Papenberg G, Johansson J, Wåhlin A, Salami A, Andersson M, Axelsson J, Kuznetsov D, Riklund K, Lövdén M, Lindenberger U, Bäckman L, Nyberg L. Longitudinal support for the correlative triad among aging, dopamine D2-like receptor loss, and memory decline. Neurobiol Aging 2024; 136:125-132. [PMID: 38359585 DOI: 10.1016/j.neurobiolaging.2024.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 01/25/2024] [Accepted: 02/01/2024] [Indexed: 02/17/2024]
Abstract
Dopamine decline is suggested to underlie aging-related cognitive decline, but longitudinal examinations of this link are currently missing. We analyzed 5-year longitudinal data for a sample of healthy, older adults (baseline: n = 181, age: 64-68 years; 5-year follow-up: n = 129) who underwent positron emission tomography with 11C-raclopride to assess dopamine D2-like receptor (DRD2) availability, magnetic resonance imaging to evaluate structural brain measures, and cognitive tests. Health, lifestyle, and genetic data were also collected. A data-driven approach (k-means cluster analysis) identified groups that differed maximally in DRD2 decline rates in age-sensitive brain regions. One group (n = 47) had DRD2 decline exclusively in the caudate and no cognitive decline. A second group (n = 72) had more wide-ranged DRD2 decline in putamen and nucleus accumbens and also in extrastriatal regions. The latter group showed significant 5-year working memory decline that correlated with putamen DRD2 decline, along with higher dementia and cardiovascular risk and a faster biological pace of aging. Taken together, for individuals with more extensive DRD2 decline, dopamine decline is associated with memory decline in aging.
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Affiliation(s)
- Nina Karalija
- Department of Medical and Translational Biology, Umeå University, Umeå S-90187, Sweden; Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå S-90187, Sweden.
| | - Goran Papenberg
- Aging Research Center, Karolinska Institutet & Stockholm University, Stockholm S-17165, Sweden
| | - Jarkko Johansson
- Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå S-90187, Sweden; Department of Diagnostics and Intervention, Diagnostic Radiology, Umeå University, Umeå S-90187, Sweden
| | - Anders Wåhlin
- Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå S-90187, Sweden; Department of Diagnostics and Intervention, Radiation Physics, Umeå University, Umeå S-90187, Sweden; Department of Applied Physics and Electronics, Umeå University, Umeå S-90187, Sweden
| | - Alireza Salami
- Department of Medical and Translational Biology, Umeå University, Umeå S-90187, Sweden; Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå S-90187, Sweden; Aging Research Center, Karolinska Institutet & Stockholm University, Stockholm S-17165, Sweden; Wallenberg Center for Molecular Medicine, Umeå University, Umeå, Sweden
| | - Micael Andersson
- Department of Medical and Translational Biology, Umeå University, Umeå S-90187, Sweden; Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå S-90187, Sweden
| | - Jan Axelsson
- Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå S-90187, Sweden; Department of Diagnostics and Intervention, Radiation Physics, Umeå University, Umeå S-90187, Sweden
| | - Dmitry Kuznetsov
- Faculty of Sociology, University of Bielefeld, Bielefeld, Germany
| | - Katrine Riklund
- Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå S-90187, Sweden; Department of Diagnostics and Intervention, Diagnostic Radiology, Umeå University, Umeå S-90187, Sweden
| | - Martin Lövdén
- Department of Psychology, University of Gothenburg, Göteborg S-41314, Sweden
| | - Ulman Lindenberger
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Berlin D-14195, Germany; Max Planck UCL Centre for Computational Psychiatry and Ageing Research, Berlin, Germany; Max Planck UCL Centre for Computational Psychiatry and Ageing Research, London, UK
| | - Lars Bäckman
- Aging Research Center, Karolinska Institutet & Stockholm University, Stockholm S-17165, Sweden
| | - Lars Nyberg
- Department of Medical and Translational Biology, Umeå University, Umeå S-90187, Sweden; Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå S-90187, Sweden; Department of Diagnostics and Intervention, Diagnostic Radiology, Umeå University, Umeå S-90187, Sweden
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4
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Pedersen R, Johansson J, Nordin K, Rieckmann A, Wåhlin A, Nyberg L, Bäckman L, Salami A. Dopamine D1-Receptor Organization Contributes to Functional Brain Architecture. J Neurosci 2024; 44:e0621232024. [PMID: 38302439 PMCID: PMC10941071 DOI: 10.1523/jneurosci.0621-23.2024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 12/01/2023] [Accepted: 01/21/2024] [Indexed: 02/03/2024] Open
Abstract
Recent work has recognized a gradient-like organization in cortical function, spanning from primary sensory to transmodal cortices. It has been suggested that this axis is aligned with regional differences in neurotransmitter expression. Given the abundance of dopamine D1-receptors (D1DR), and its importance for modulation and neural gain, we tested the hypothesis that D1DR organization is aligned with functional architecture, and that inter-regional relationships in D1DR co-expression modulate functional cross talk. Using the world's largest dopamine D1DR-PET and MRI database (N = 180%, 50% female), we demonstrate that D1DR organization follows a unimodal-transmodal hierarchy, expressing a high spatial correspondence to the principal gradient of functional connectivity. We also demonstrate that individual differences in D1DR density between unimodal and transmodal regions are associated with functional differentiation of the apices in the cortical hierarchy. Finally, we show that spatial co-expression of D1DR primarily modulates couplings within, but not between, functional networks. Together, our results show that D1DR co-expression provides a biomolecular layer to the functional organization of the brain.
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Affiliation(s)
- Robin Pedersen
- Department of Integrative Medical Biology, Umeå University, Umeå S-90197, Sweden
- Wallenberg Center for Molecular Medicine (WCMM), Umeå University, Umeå S-90197, Sweden
- Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå S-90197, Sweden
| | - Jarkko Johansson
- Department of Integrative Medical Biology, Umeå University, Umeå S-90197, Sweden
- Wallenberg Center for Molecular Medicine (WCMM), Umeå University, Umeå S-90197, Sweden
- Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå S-90197, Sweden
| | - Kristin Nordin
- Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå S-90197, Sweden
- Aging Research Center, Karolinska Institutet & Stockholm University, Stockholm S-17165, Sweden
| | - Anna Rieckmann
- Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå S-90197, Sweden
- Department of Radiation Sciences, Umeå University, Umeå S-90197, Sweden
- Max-Planck-Institut für Sozialrecht und Sozialpolitik, Munich 80799, Germany
| | - Anders Wåhlin
- Department of Integrative Medical Biology, Umeå University, Umeå S-90197, Sweden
- Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå S-90197, Sweden
| | - Lars Nyberg
- Department of Integrative Medical Biology, Umeå University, Umeå S-90197, Sweden
- Wallenberg Center for Molecular Medicine (WCMM), Umeå University, Umeå S-90197, Sweden
- Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå S-90197, Sweden
- Department of Radiation Sciences, Umeå University, Umeå S-90197, Sweden
| | - Lars Bäckman
- Aging Research Center, Karolinska Institutet & Stockholm University, Stockholm S-17165, Sweden
| | - Alireza Salami
- Department of Integrative Medical Biology, Umeå University, Umeå S-90197, Sweden
- Wallenberg Center for Molecular Medicine (WCMM), Umeå University, Umeå S-90197, Sweden
- Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå S-90197, Sweden
- Aging Research Center, Karolinska Institutet & Stockholm University, Stockholm S-17165, Sweden
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5
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Johansson J, Ericsson M, Axelsson J, Bjerkén SA, Virel A, Karalija N. Amphetamine-induced dopamine release in rat: Whole-brain spatiotemporal analysis with [ 11C]raclopride and positron emission tomography. J Cereb Blood Flow Metab 2024; 44:434-445. [PMID: 37882727 PMCID: PMC10870964 DOI: 10.1177/0271678x231210128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 09/06/2023] [Accepted: 10/01/2023] [Indexed: 10/27/2023]
Abstract
Whole-brain mapping of drug effects are needed to understand the neural underpinnings of drug-related behaviors. Amphetamine administration is associated with robust increases in striatal dopamine (DA) release. Dopaminergic terminals are, however, present across several associative brain regions, which may contribute to behavioral effects of amphetamine. Yet the assessment of DA release has been restricted to a few brain regions of interest. The present work employed positron emission tomography (PET) with [11C]raclopride to investigate regional and temporal characteristics of amphetamine-induced DA release across twenty sessions in adult female Sprague Dawley rats. Amphetamine was injected intravenously (2 mg/kg) to cause displacement of [11C]raclopride binding from DA D2-like receptors, assessed using temporally sensitive pharmacokinetic PET model (lp-ntPET). We show amphetamine-induced [11C]raclopride displacement in the basal ganglia, and no changes following saline injections. Peak occupancy was highest in nucleus accumbens, followed by caudate-putamen and globus pallidus. Importantly, significant amphetamine-induced displacement was also observed in several extrastriatal regions, and specifically in thalamus, insula, orbitofrontal cortex, and secondary somatosensory area. For these, peak occupancy occurred later and was lower as compared to the striatum. Collectively, these findings demonstrate distinct amphetamine-induced DA responses across the brain, and that [11C]raclopride-PET can be employed to detect such spatiotemporal differences.
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Affiliation(s)
- Jarkko Johansson
- Department of Radiation Sciences, Diagnostic Radiology, Umeå University, Umeå, Sweden
- Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden
| | | | - Jan Axelsson
- Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden
- Department of Radiation Sciences, Radiation Physics, Umeå University, Umeå, Sweden
| | - Sara af Bjerkén
- Department of Integrative Medical Biology, Umeå University, Umeå, Sweden
- Department of Clinical Science, Neurosciences, Umeå University, Umeå, Sweden
| | - Ana Virel
- Department of Integrative Medical Biology, Umeå University, Umeå, Sweden
| | - Nina Karalija
- Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden
- Department of Integrative Medical Biology, Umeå University, Umeå, Sweden
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6
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Phillips RD, Walsh EC, Zürcher NR, Lalush DS, Kinard JL, Tseng CE, Cernasov PM, Kan D, Cummings K, Kelley L, Campbell D, Dillon DG, Pizzagalli DA, Izquierdo-Garcia D, Hooker JM, Smoski MJ, Dichter GS. Striatal dopamine in anhedonia: A simultaneous [ 11C]raclopride positron emission tomography and functional magnetic resonance imaging investigation. Psychiatry Res Neuroimaging 2023; 333:111660. [PMID: 37301129 PMCID: PMC10594643 DOI: 10.1016/j.pscychresns.2023.111660] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 04/21/2023] [Accepted: 05/18/2023] [Indexed: 06/12/2023]
Abstract
BACKGROUND Anhedonia is hypothesized to be associated with blunted mesocorticolimbic dopamine (DA) functioning in samples with major depressive disorder. The purpose of this study was to examine linkages between striatal DA, reward circuitry functioning, anhedonia, and, in an exploratory fashion, self-reported stress, in a transdiagnostic anhedonic sample. METHODS Participants with (n = 25) and without (n = 12) clinically impairing anhedonia completed a reward-processing task during simultaneous positron emission tomography and magnetic resonance (PET-MR) imaging with [11C]raclopride, a DA D2/D3 receptor antagonist that selectively binds to striatal DA receptors. RESULTS Relative to controls, the anhedonia group exhibited decreased task-related DA release in the left putamen, caudate, and nucleus accumbens and right putamen and pallidum. There were no group differences in task-related brain activation (fMRI) during reward processing after correcting for multiple comparisons. General functional connectivity (GFC) findings revealed blunted fMRI connectivity between PET-derived striatal seeds and target regions in the anhedonia group. Associations were identified between anhedonia severity and the magnitude of task-related DA release to rewards in the left putamen, but not mesocorticolimbic GFC. CONCLUSIONS Results provide evidence for reduced striatal DA functioning during reward processing and blunted mesocorticolimbic network functional connectivity in a transdiagnostic sample with clinically significant anhedonia.
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Affiliation(s)
- Rachel D Phillips
- Department of Psychology and Neuroscience, University of North Carolina-Chapel Hill, Chapel Hill, NC, United States.
| | - Erin C Walsh
- Department of Psychiatry, University of North Carolina-Chapel Hill, Chapel Hill, NC, United States
| | - Nicole R Zürcher
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, United States
| | - David S Lalush
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, NC, United States
| | - Jessica L Kinard
- Carolina Institute for Developmental Disabilities, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, Chapel Hill, NC, United States
| | - Chieh-En Tseng
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, United States
| | - Paul M Cernasov
- Department of Psychology and Neuroscience, University of North Carolina-Chapel Hill, Chapel Hill, NC, United States
| | - Delia Kan
- Carolina Institute for Developmental Disabilities, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, Chapel Hill, NC, United States
| | - Kaitlin Cummings
- Department of Psychology and Neuroscience, University of North Carolina-Chapel Hill, Chapel Hill, NC, United States
| | - Lisalynn Kelley
- Department of Psychiatry & Behavioral Sciences, Duke University, Durham, NC, United States
| | - David Campbell
- Department of Psychiatry & Behavioral Sciences, Duke University, Durham, NC, United States
| | - Daniel G Dillon
- Center for Depression, Anxiety and Stress Research, McLean Hospital, Belmont, MA, United States
| | - Diego A Pizzagalli
- Center for Depression, Anxiety and Stress Research, McLean Hospital, Belmont, MA, United States
| | - David Izquierdo-Garcia
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, United States
| | - Jacob M Hooker
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, United States
| | - Moria J Smoski
- Department of Psychiatry & Behavioral Sciences, Duke University, Durham, NC, United States
| | - Gabriel S Dichter
- Department of Psychology and Neuroscience, University of North Carolina-Chapel Hill, Chapel Hill, NC, United States; Department of Psychiatry, University of North Carolina-Chapel Hill, Chapel Hill, NC, United States; Carolina Institute for Developmental Disabilities, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, Chapel Hill, NC, United States
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7
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Pedersen R, Johansson J, Salami A. Dopamine D1-signaling modulates maintenance of functional network segregation in aging. AGING BRAIN 2023; 3:100079. [PMID: 37408790 PMCID: PMC10318303 DOI: 10.1016/j.nbas.2023.100079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 04/21/2023] [Accepted: 05/24/2023] [Indexed: 07/07/2023] Open
Abstract
Past research has shown that as individuals age, there are decreases in within-network connectivity and increases in between-network connectivity, a pattern known as functional dedifferentiation. While the mechanisms behind reduced network segregation are not fully understood, evidence suggests that age-related differences in the dopamine (DA) system may play a key role. The DA D1-receptor (D1DR) is the most abundant and age-sensitive receptor subtype in the dopaminergic system, known to modulate synaptic activity and enhance the specificity of the neuronal signals. In this study from the DyNAMiC project (N = 180, 20-79y), we set out to investigate the interplay among age, functional connectivity, and dopamine D1DR availability. Using a novel application of multivariate Partial Least squares (PLS), we found that older age, and lower D1DR availability, were simultaneously associated with a pattern of decreased within-network and increased between-network connectivity. Individuals who expressed greater distinctiveness of large-scale networks exhibited more efficient working memory. In line with the maintenance hypotheses, we found that older individuals with greater D1DR in caudate exhibited less dedifferentiation of the connectome, and greater working memory, compared to their age-matched counterparts with less D1DR. These findings suggest that dopaminergic neurotransmission plays an important role in functional dedifferentiation in aging with consequences for working memory function at older age.
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Affiliation(s)
- Robin Pedersen
- Department of Integrative Medical Biology, Umeå University, Umeå, Sweden
- Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden
- Wallenberg Center for Molecular Medicine (WCMM), Umeå University, Umeå, Sweden
| | - Jarkko Johansson
- Department of Integrative Medical Biology, Umeå University, Umeå, Sweden
- Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden
- Wallenberg Center for Molecular Medicine (WCMM), Umeå University, Umeå, Sweden
| | - Alireza Salami
- Department of Integrative Medical Biology, Umeå University, Umeå, Sweden
- Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden
- Wallenberg Center for Molecular Medicine (WCMM), Umeå University, Umeå, Sweden
- Aging Research Center, Karolinska Institutet & Stockholm University, Stockholm, Sweden
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8
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Bandala C, Cárdenas-Rodríguez N, Mendoza-Torreblanca JG, Contreras-García IJ, Martínez-López V, Cruz-Hernández TR, Carro-Rodríguez J, Vargas-Hernández MA, Ignacio-Mejía I, Alfaro-Rodriguez A, Lara-Padilla E. Therapeutic Potential of Dopamine and Related Drugs as Anti-Inflammatories and Antioxidants in Neuronal and Non-Neuronal Pathologies. Pharmaceutics 2023; 15:pharmaceutics15020693. [PMID: 36840015 PMCID: PMC9966027 DOI: 10.3390/pharmaceutics15020693] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 02/11/2023] [Accepted: 02/15/2023] [Indexed: 02/22/2023] Open
Abstract
Dopamine (DA), its derivatives, and dopaminergic drugs are compounds widely used in the management of diseases related to the nervous system. However, DA receptors have been identified in nonneuronal tissues, which has been related to their therapeutic potential in pathologies such as sepsis or septic shock, blood pressure, renal failure, diabetes, and obesity, among others. In addition, DA and dopaminergic drugs have shown anti-inflammatory and antioxidant properties in different kinds of cells. AIM To compile the mechanism of action of DA and the main dopaminergic drugs and show the findings that support the therapeutic potential of these molecules for the treatment of neurological and non-neurological diseases considering their antioxidant and anti-inflammatory actions. METHOD We performed a review article. An exhaustive search for information was carried out in specialized databases such as PubMed, PubChem, ProQuest, EBSCO, Scopus, Science Direct, Web of Science, Bookshelf, DrugBank, Livertox, and Clinical Trials. RESULTS We showed that DA and dopaminergic drugs have emerged for the management of neuronal and nonneuronal diseases with important therapeutic potential as anti-inflammatories and antioxidants. CONCLUSIONS DA and DA derivatives can be an attractive treatment strategy and a promising approach to slowing the progression of disorders through repositioning.
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Affiliation(s)
- Cindy Bandala
- Neurociencia Básica, Instituto Nacional de Rehabilitación LGII, Secretaría de Salud, Mexico City 14389, Mexico
- Escuela Superior de Medicina, Instituto Politécnico Nacional, Mexico City 11340, Mexico
- Correspondence: (C.B.); (E.L.-P.); Tel.: +52-(55)-5999-1000 (ext. 19307) (C.B.); +52-(55)-57296000 (ext. 62712) (E.L.-P.)
| | - Noemi Cárdenas-Rodríguez
- Escuela Superior de Medicina, Instituto Politécnico Nacional, Mexico City 11340, Mexico
- Laboratorio de Neurociencias, Subdirección de Medicina Experimental, Instituto Nacional de Pediatría, Mexico City 04530, Mexico
| | | | | | - Valentín Martínez-López
- Unidad de Ingeniería de Tejidos, Terapia Celular y Medicina Regenerativa, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Mexico City 14389, Mexico
| | | | - Jazmín Carro-Rodríguez
- Escuela de Biología Experimental, Unidad Iztapalapa, Universidad Autónoma Metropolitana, Mexico City 09340, Mexico
| | | | - Iván Ignacio-Mejía
- Laboratorio de Medicina Traslacional, Escuela Militar de Graduados de Sanidad, Mexico City 11200, Mexico
| | - Alfonso Alfaro-Rodriguez
- Neurociencia Básica, Instituto Nacional de Rehabilitación LGII, Secretaría de Salud, Mexico City 14389, Mexico
| | - Eleazar Lara-Padilla
- Escuela Superior de Medicina, Instituto Politécnico Nacional, Mexico City 11340, Mexico
- Correspondence: (C.B.); (E.L.-P.); Tel.: +52-(55)-5999-1000 (ext. 19307) (C.B.); +52-(55)-57296000 (ext. 62712) (E.L.-P.)
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von Cederwald BF, Johansson J, Riklund K, Karalija N, Boraxbekk CJ. White matter lesion load determines exercise-induced dopaminergic plasticity and working memory gains in aging. Transl Psychiatry 2023; 13:28. [PMID: 36720847 PMCID: PMC9889313 DOI: 10.1038/s41398-022-02270-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 11/02/2022] [Accepted: 11/28/2022] [Indexed: 02/01/2023] Open
Abstract
Age-related dopamine reductions have been suggested to contribute to maladaptive working memory (WM) function in older ages. One promising intervention approach is to increase physical activity, as this has been associated with plasticity of the striatal dopamine system and WM improvements, however with individual differences in efficacy. The present work focused on the impact of individual differences in white-matter lesion burden upon dopamine D2-like receptor (DRD2) availability and WM changes in response to a 6 months physical activity intervention. While the intervention altered striatal DRD2 availability and WM performance in individuals with no or only mild lesions (p < 0.05), no such effects were found in individuals with moderate-to-severe lesion severity (p > 0.05). Follow-up analyses revealed a similar pattern for processing speed, but not for episodic memory performance. Linear analyses further revealed that lesion volume (ml) at baseline was associated with reduced DRD2 availability (r = -0.41, p < 0.05), and level of DRD2 change (r = 0.40, p < 0.05). Taken together, this study underlines the necessity to consider cerebrovascular health in interventions with neurocognitive targets. Future work should assess whether these findings extend beyond measures of DRD2 availability and WM.
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Affiliation(s)
- Bryn Farnsworth von Cederwald
- grid.12650.300000 0001 1034 3451Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden ,grid.12650.300000 0001 1034 3451Department of Integrative Medical Biology, Umeå University, Umeå, Sweden
| | - Jarkko Johansson
- grid.12650.300000 0001 1034 3451Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden ,grid.12650.300000 0001 1034 3451Department of Radiation Sciences, Diagnostic Radiology, Umeå University, Umeå, Sweden
| | - Katrine Riklund
- grid.12650.300000 0001 1034 3451Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden ,grid.12650.300000 0001 1034 3451Department of Radiation Sciences, Diagnostic Radiology, Umeå University, Umeå, Sweden
| | - Nina Karalija
- Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden. .,Department of Integrative Medical Biology, Umeå University, Umeå, Sweden.
| | - Carl-Johan Boraxbekk
- Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden. .,Department of Radiation Sciences, Diagnostic Radiology, Umeå University, Umeå, Sweden. .,Danish Research Center for Magnetic Resonance (DRCMR), Center for Functional and Diagnostic Imaging and Research, Copenhagen University Hospital, Amager and Hvidovre, Copenhagen, Denmark. .,Institute of Sports Medicine Copenhagen (ISMC) and Department of Neurology, Copenhagen University Hospital Bispebjerg, Copenhagen, Denmark. .,Institute for Clinical Medicine, Faculty of Medical and Health Sciences, University of Copenhagen, Copenhagen, Denmark.
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Simonsson E, Stiernman LJ, Lundquist A, Rosendahl E, Hedlund M, Lindelöf N, Boraxbekk CJ. Dopamine D2/3-receptor availability and its association with autonomous motivation to exercise in older adults: An exploratory [11C]-raclopride study. Front Hum Neurosci 2022; 16:997131. [DOI: 10.3389/fnhum.2022.997131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Accepted: 10/17/2022] [Indexed: 11/12/2022] Open
Abstract
BackgroundAutonomous motivation to exercise occurs when the activity is voluntary and with a perceived inherent satisfaction from the activity itself. It has been suggested that autonomous motivation is related to striatal dopamine D2/3-receptor (D2/3R) availability within the brain. In this study, we hypothesized that D2/3R availability in three striatal regions (nucleus accumbens, caudate nucleus, and putamen) would be positively associated with self-reported autonomous motivation to exercise. We also examined this relationship with additional exploratory analyses across a set of a priori extrastriatal regions of interest (ROI).MethodsOur sample comprised 49 older adults (28 females) between 64 and 78 years of age. The D2/3R availability was quantified from positron emission tomography using the non-displaceable binding potential of [11C]-raclopride ligand. The exercise-related autonomous motivation was assessed with the Swedish version of the Behavioral Regulations in Exercise Questionnaire-2.ResultsNo significant associations were observed between self-reported autonomous motivation to exercise and D2/3R availability within the striatum (nucleus accumbens, caudate nucleus, and putamen) using semi-partial correlations controlling for ROI volume on D2/3R availability. For exploratory analyses, positive associations were observed for the superior (r = 0.289, p = 0.023) and middle frontal gyrus (r = 0.330, p = 0.011), but not for the inferior frontal gyrus, orbitofrontal cortex, anterior cingulate cortex, or anterior insular cortex.ConclusionThis study could not confirm the suggested link between striatal D2/3R availability and subjective autonomous motivation to exercise among older adults. The exploratory findings, however, propose that frontal brain regions may be involved in the intrinsic regulation of exercise-related behaviors, though this has to be confirmed by future studies using a more suitable ligand and objective measures of physical activity levels.
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Karalija N, Johansson J, Papenberg G, Wåhlin A, Salami A, Köhncke Y, Brandmaier AM, Andersson M, Axelsson J, Riklund K, Lövdén M, Lindenberger U, Bäckman L, Nyberg L. Longitudinal Dopamine D2 Receptor Changes and Cerebrovascular Health in Aging. Neurology 2022; 99:e1278-e1289. [PMID: 35790424 PMCID: PMC9576296 DOI: 10.1212/wnl.0000000000200891] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Accepted: 05/11/2022] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND AND OBJECTIVES Cross-sectional studies suggest marked dopamine (DA) decline in aging, but longitudinal evidence is lacking. The aim of this study was to estimate within-person decline rates for DA D2-like receptors (DRD2) in aging and examine factors that may contribute to individual differences in DRD2 decline rates. METHODS We investigated 5-year within-person changes in DRD2 availability in a sample of older adults. At both occasions, PET with 11C-raclopride and MRI were used to measure DRD2 availability in conjunction with structural and vascular brain integrity. RESULTS Longitudinal analyses of the sample (baseline: n = 181, ages: 64-68 years, 100 men and 81 women; 5-year follow-up: n = 129, 69 men and 60 women) revealed aging-related striatal and extrastriatal DRD2 decline, along with marked individual differences in rates of change. Notably, the magnitude of striatal DRD2 decline was ∼50% of past cross-sectional estimates, suggesting that the DRD2 decline rate has been overestimated in past cross-sectional studies. Significant DRD2 reductions were also observed in select extrastriatal regions, including hippocampus, orbitofrontal cortex (OFC), and anterior cingulate cortex (ACC). Distinct profiles of correlated DRD2 changes were found across several associative regions (ACC, dorsal striatum, and hippocampus) and in the reward circuit (nucleus accumbens and OFC). DRD2 losses in associative regions were associated with white matter lesion progression, whereas DRD2 losses in limbic regions were related to reduced cortical perfusion. DISCUSSION These findings provide the first longitudinal evidence for individual and region-specific differences of DRD2 decline in older age and support the hypothesis that cerebrovascular factors are linked to age-related dopaminergic decline.
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Affiliation(s)
- Nina Karalija
- From the Departments of Radiation Sciences, Diagnostic Radiology (N.K., J.J., K.R., L.N.) and Radiation Physics (A.W., J.A.), Department of Applied Physics and Electronics (A.W.), and Umeå Center for Functional Brain Imaging (UFBI) (N.K., J.J., A.W., A.S., M.A., J.A., K.R., L.N.), Umeå University; Aging Research Center (G.P., A.S., L.B.), Karolinska Institutet & Stockholm University; Department of Integrative Medical Biology (A.S., M.A., L.N.), and Wallenberg Center for Molecular Medicine (A.S., L.N.), Umeå University, Sweden; Center for Lifespan Psychology (Y.K., A.M.B., U.L.), Max Planck Institute for Human Development; Max Planck UCL Centre for Computational Psychiatry and Ageing Research (A.M.B., U.L.), Berlin, Germany and London, UK; and Department of Psychology (M.L.), University of Gothenburg, Sweden.
| | - Jarkko Johansson
- From the Departments of Radiation Sciences, Diagnostic Radiology (N.K., J.J., K.R., L.N.) and Radiation Physics (A.W., J.A.), Department of Applied Physics and Electronics (A.W.), and Umeå Center for Functional Brain Imaging (UFBI) (N.K., J.J., A.W., A.S., M.A., J.A., K.R., L.N.), Umeå University; Aging Research Center (G.P., A.S., L.B.), Karolinska Institutet & Stockholm University; Department of Integrative Medical Biology (A.S., M.A., L.N.), and Wallenberg Center for Molecular Medicine (A.S., L.N.), Umeå University, Sweden; Center for Lifespan Psychology (Y.K., A.M.B., U.L.), Max Planck Institute for Human Development; Max Planck UCL Centre for Computational Psychiatry and Ageing Research (A.M.B., U.L.), Berlin, Germany and London, UK; and Department of Psychology (M.L.), University of Gothenburg, Sweden
| | - Goran Papenberg
- From the Departments of Radiation Sciences, Diagnostic Radiology (N.K., J.J., K.R., L.N.) and Radiation Physics (A.W., J.A.), Department of Applied Physics and Electronics (A.W.), and Umeå Center for Functional Brain Imaging (UFBI) (N.K., J.J., A.W., A.S., M.A., J.A., K.R., L.N.), Umeå University; Aging Research Center (G.P., A.S., L.B.), Karolinska Institutet & Stockholm University; Department of Integrative Medical Biology (A.S., M.A., L.N.), and Wallenberg Center for Molecular Medicine (A.S., L.N.), Umeå University, Sweden; Center for Lifespan Psychology (Y.K., A.M.B., U.L.), Max Planck Institute for Human Development; Max Planck UCL Centre for Computational Psychiatry and Ageing Research (A.M.B., U.L.), Berlin, Germany and London, UK; and Department of Psychology (M.L.), University of Gothenburg, Sweden
| | - Anders Wåhlin
- From the Departments of Radiation Sciences, Diagnostic Radiology (N.K., J.J., K.R., L.N.) and Radiation Physics (A.W., J.A.), Department of Applied Physics and Electronics (A.W.), and Umeå Center for Functional Brain Imaging (UFBI) (N.K., J.J., A.W., A.S., M.A., J.A., K.R., L.N.), Umeå University; Aging Research Center (G.P., A.S., L.B.), Karolinska Institutet & Stockholm University; Department of Integrative Medical Biology (A.S., M.A., L.N.), and Wallenberg Center for Molecular Medicine (A.S., L.N.), Umeå University, Sweden; Center for Lifespan Psychology (Y.K., A.M.B., U.L.), Max Planck Institute for Human Development; Max Planck UCL Centre for Computational Psychiatry and Ageing Research (A.M.B., U.L.), Berlin, Germany and London, UK; and Department of Psychology (M.L.), University of Gothenburg, Sweden
| | - Alireza Salami
- From the Departments of Radiation Sciences, Diagnostic Radiology (N.K., J.J., K.R., L.N.) and Radiation Physics (A.W., J.A.), Department of Applied Physics and Electronics (A.W.), and Umeå Center for Functional Brain Imaging (UFBI) (N.K., J.J., A.W., A.S., M.A., J.A., K.R., L.N.), Umeå University; Aging Research Center (G.P., A.S., L.B.), Karolinska Institutet & Stockholm University; Department of Integrative Medical Biology (A.S., M.A., L.N.), and Wallenberg Center for Molecular Medicine (A.S., L.N.), Umeå University, Sweden; Center for Lifespan Psychology (Y.K., A.M.B., U.L.), Max Planck Institute for Human Development; Max Planck UCL Centre for Computational Psychiatry and Ageing Research (A.M.B., U.L.), Berlin, Germany and London, UK; and Department of Psychology (M.L.), University of Gothenburg, Sweden
| | - Ylva Köhncke
- From the Departments of Radiation Sciences, Diagnostic Radiology (N.K., J.J., K.R., L.N.) and Radiation Physics (A.W., J.A.), Department of Applied Physics and Electronics (A.W.), and Umeå Center for Functional Brain Imaging (UFBI) (N.K., J.J., A.W., A.S., M.A., J.A., K.R., L.N.), Umeå University; Aging Research Center (G.P., A.S., L.B.), Karolinska Institutet & Stockholm University; Department of Integrative Medical Biology (A.S., M.A., L.N.), and Wallenberg Center for Molecular Medicine (A.S., L.N.), Umeå University, Sweden; Center for Lifespan Psychology (Y.K., A.M.B., U.L.), Max Planck Institute for Human Development; Max Planck UCL Centre for Computational Psychiatry and Ageing Research (A.M.B., U.L.), Berlin, Germany and London, UK; and Department of Psychology (M.L.), University of Gothenburg, Sweden
| | - Andreas M Brandmaier
- From the Departments of Radiation Sciences, Diagnostic Radiology (N.K., J.J., K.R., L.N.) and Radiation Physics (A.W., J.A.), Department of Applied Physics and Electronics (A.W.), and Umeå Center for Functional Brain Imaging (UFBI) (N.K., J.J., A.W., A.S., M.A., J.A., K.R., L.N.), Umeå University; Aging Research Center (G.P., A.S., L.B.), Karolinska Institutet & Stockholm University; Department of Integrative Medical Biology (A.S., M.A., L.N.), and Wallenberg Center for Molecular Medicine (A.S., L.N.), Umeå University, Sweden; Center for Lifespan Psychology (Y.K., A.M.B., U.L.), Max Planck Institute for Human Development; Max Planck UCL Centre for Computational Psychiatry and Ageing Research (A.M.B., U.L.), Berlin, Germany and London, UK; and Department of Psychology (M.L.), University of Gothenburg, Sweden
| | - Micael Andersson
- From the Departments of Radiation Sciences, Diagnostic Radiology (N.K., J.J., K.R., L.N.) and Radiation Physics (A.W., J.A.), Department of Applied Physics and Electronics (A.W.), and Umeå Center for Functional Brain Imaging (UFBI) (N.K., J.J., A.W., A.S., M.A., J.A., K.R., L.N.), Umeå University; Aging Research Center (G.P., A.S., L.B.), Karolinska Institutet & Stockholm University; Department of Integrative Medical Biology (A.S., M.A., L.N.), and Wallenberg Center for Molecular Medicine (A.S., L.N.), Umeå University, Sweden; Center for Lifespan Psychology (Y.K., A.M.B., U.L.), Max Planck Institute for Human Development; Max Planck UCL Centre for Computational Psychiatry and Ageing Research (A.M.B., U.L.), Berlin, Germany and London, UK; and Department of Psychology (M.L.), University of Gothenburg, Sweden
| | - Jan Axelsson
- From the Departments of Radiation Sciences, Diagnostic Radiology (N.K., J.J., K.R., L.N.) and Radiation Physics (A.W., J.A.), Department of Applied Physics and Electronics (A.W.), and Umeå Center for Functional Brain Imaging (UFBI) (N.K., J.J., A.W., A.S., M.A., J.A., K.R., L.N.), Umeå University; Aging Research Center (G.P., A.S., L.B.), Karolinska Institutet & Stockholm University; Department of Integrative Medical Biology (A.S., M.A., L.N.), and Wallenberg Center for Molecular Medicine (A.S., L.N.), Umeå University, Sweden; Center for Lifespan Psychology (Y.K., A.M.B., U.L.), Max Planck Institute for Human Development; Max Planck UCL Centre for Computational Psychiatry and Ageing Research (A.M.B., U.L.), Berlin, Germany and London, UK; and Department of Psychology (M.L.), University of Gothenburg, Sweden
| | - Katrine Riklund
- From the Departments of Radiation Sciences, Diagnostic Radiology (N.K., J.J., K.R., L.N.) and Radiation Physics (A.W., J.A.), Department of Applied Physics and Electronics (A.W.), and Umeå Center for Functional Brain Imaging (UFBI) (N.K., J.J., A.W., A.S., M.A., J.A., K.R., L.N.), Umeå University; Aging Research Center (G.P., A.S., L.B.), Karolinska Institutet & Stockholm University; Department of Integrative Medical Biology (A.S., M.A., L.N.), and Wallenberg Center for Molecular Medicine (A.S., L.N.), Umeå University, Sweden; Center for Lifespan Psychology (Y.K., A.M.B., U.L.), Max Planck Institute for Human Development; Max Planck UCL Centre for Computational Psychiatry and Ageing Research (A.M.B., U.L.), Berlin, Germany and London, UK; and Department of Psychology (M.L.), University of Gothenburg, Sweden
| | - Martin Lövdén
- From the Departments of Radiation Sciences, Diagnostic Radiology (N.K., J.J., K.R., L.N.) and Radiation Physics (A.W., J.A.), Department of Applied Physics and Electronics (A.W.), and Umeå Center for Functional Brain Imaging (UFBI) (N.K., J.J., A.W., A.S., M.A., J.A., K.R., L.N.), Umeå University; Aging Research Center (G.P., A.S., L.B.), Karolinska Institutet & Stockholm University; Department of Integrative Medical Biology (A.S., M.A., L.N.), and Wallenberg Center for Molecular Medicine (A.S., L.N.), Umeå University, Sweden; Center for Lifespan Psychology (Y.K., A.M.B., U.L.), Max Planck Institute for Human Development; Max Planck UCL Centre for Computational Psychiatry and Ageing Research (A.M.B., U.L.), Berlin, Germany and London, UK; and Department of Psychology (M.L.), University of Gothenburg, Sweden
| | - Ulman Lindenberger
- From the Departments of Radiation Sciences, Diagnostic Radiology (N.K., J.J., K.R., L.N.) and Radiation Physics (A.W., J.A.), Department of Applied Physics and Electronics (A.W.), and Umeå Center for Functional Brain Imaging (UFBI) (N.K., J.J., A.W., A.S., M.A., J.A., K.R., L.N.), Umeå University; Aging Research Center (G.P., A.S., L.B.), Karolinska Institutet & Stockholm University; Department of Integrative Medical Biology (A.S., M.A., L.N.), and Wallenberg Center for Molecular Medicine (A.S., L.N.), Umeå University, Sweden; Center for Lifespan Psychology (Y.K., A.M.B., U.L.), Max Planck Institute for Human Development; Max Planck UCL Centre for Computational Psychiatry and Ageing Research (A.M.B., U.L.), Berlin, Germany and London, UK; and Department of Psychology (M.L.), University of Gothenburg, Sweden
| | - Lars Bäckman
- From the Departments of Radiation Sciences, Diagnostic Radiology (N.K., J.J., K.R., L.N.) and Radiation Physics (A.W., J.A.), Department of Applied Physics and Electronics (A.W.), and Umeå Center for Functional Brain Imaging (UFBI) (N.K., J.J., A.W., A.S., M.A., J.A., K.R., L.N.), Umeå University; Aging Research Center (G.P., A.S., L.B.), Karolinska Institutet & Stockholm University; Department of Integrative Medical Biology (A.S., M.A., L.N.), and Wallenberg Center for Molecular Medicine (A.S., L.N.), Umeå University, Sweden; Center for Lifespan Psychology (Y.K., A.M.B., U.L.), Max Planck Institute for Human Development; Max Planck UCL Centre for Computational Psychiatry and Ageing Research (A.M.B., U.L.), Berlin, Germany and London, UK; and Department of Psychology (M.L.), University of Gothenburg, Sweden
| | - Lars Nyberg
- From the Departments of Radiation Sciences, Diagnostic Radiology (N.K., J.J., K.R., L.N.) and Radiation Physics (A.W., J.A.), Department of Applied Physics and Electronics (A.W.), and Umeå Center for Functional Brain Imaging (UFBI) (N.K., J.J., A.W., A.S., M.A., J.A., K.R., L.N.), Umeå University; Aging Research Center (G.P., A.S., L.B.), Karolinska Institutet & Stockholm University; Department of Integrative Medical Biology (A.S., M.A., L.N.), and Wallenberg Center for Molecular Medicine (A.S., L.N.), Umeå University, Sweden; Center for Lifespan Psychology (Y.K., A.M.B., U.L.), Max Planck Institute for Human Development; Max Planck UCL Centre for Computational Psychiatry and Ageing Research (A.M.B., U.L.), Berlin, Germany and London, UK; and Department of Psychology (M.L.), University of Gothenburg, Sweden
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El Hayek SA, Shatila MA, Adnan JA, Geagea LE, Kobeissy F, Talih FR. Is there a therapeutic potential in combining bupropion and naltrexone in schizophrenia? Expert Rev Neurother 2022; 22:737-749. [PMID: 36093756 DOI: 10.1080/14737175.2022.2124369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
INTRODUCTION A sustained-release tablet composed of a combination of the dopamine and norepinephrine reuptake inhibitor bupropion (BUP) and the µ-opioid receptor antagonist naltrexone (NAT) is marketed under the brand name Contrave by Orexigen Therapeutics for appetite control. Minimal literature is available regarding the use of combination bupropion and naltrexone (BUPNAT) in individuals with schizophrenia. AREAS COVERED In this review, we propose a theoretical model where BUPNAT may have a therapeutic effect in the treatment of schizophrenia. We explore the pathways targeted by the constituent drugs BUP and NAT and summarize the literature on their efficacy and possible adverse effects. We then look at the potential use of BUPNAT in schizophrenia. EXPERT OPINION Research has hinted that BUP's dopaminergic properties affect the same striatal pathways involved in schizophrenia. NAT, via opioid receptor antagonism, indirectly increases striatal dopamine release by disinhibiting nicotinic acetylcholine receptors. As such, we hypothesize that BUPNAT can have a therapeutic effect in schizophrenia, particularly on negative symptoms. We also suggest that it may ameliorate comorbidities frequently seen in this group of patients, including obesity, smoking, and substance use. Further research and clinical data are needed to elucidate the potential clinical benefits of BUPNAT in the treatment of schizophrenia.
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Affiliation(s)
- Samer A. El Hayek
- Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Malek A. Shatila
- Faculty of Medicine, American University of Beirut, Beirut, Lebanon
| | - Jana A. Adnan
- Faculty of Medicine, American University of Beirut, Beirut, Lebanon
| | - Luna E. Geagea
- Department of Psychiatry, American University of Beirut, Beirut, Lebanon
| | - Firas Kobeissy
- Department of Biochemistry and Molecular Genetics, American University of Beirut, Beirut, Lebanon
| | - Farid R. Talih
- Department of Psychiatry, American University of Beirut, Beirut, Lebanon
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Cortical D1 and D2 dopamine receptor availability modulate methylphenidate-induced changes in brain activity and functional connectivity. Commun Biol 2022; 5:514. [PMID: 35637272 PMCID: PMC9151821 DOI: 10.1038/s42003-022-03434-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Accepted: 05/02/2022] [Indexed: 11/08/2022] Open
Abstract
Dopamine signaling plays a critical role in shaping brain functional network organization and behavior. Prominent theories suggest the relative expression of D1- to D2-like dopamine receptors shapes excitatory versus inhibitory signaling, with broad consequences for cognition. Yet it remains unknown how the balance between cortical D1R versus D2R signaling coordinates the activity and connectivity of functional networks in the human brain. To address this, we collected three PET scans and two fMRI scans in 36 healthy adults (13 female/23 male; average age 43 ± 12 years), including a baseline D1R PET scan and two sets of D2R PET scans and fMRI scans following administration of either 60 mg oral methylphenidate or placebo (two separate days, blinded, order counterbalanced). The drug challenge allowed us to assess how pharmacologically boosting dopamine levels alters network organization and behavior in association with D1R-D2R ratios across the brain. We found that the relative D1R-D2R ratio was significantly greater in high-level association cortices than in sensorimotor cortices. After stimulation with methylphenidate compared to placebo, brain activity (as indexed by the fractional amplitude of low frequency fluctuations) increased in association cortices and decreased in sensorimotor cortices. Further, within-network resting state functional connectivity strength decreased more in sensorimotor than association cortices following methylphenidate. Finally, in association but not sensorimotor cortices, the relative D1R-D2R ratio (but not the relative availability of D1R or D2R alone) was positively correlated with spatial working memory performance, and negatively correlated with age. Together, these data provide a framework for how dopamine-boosting drugs like methylphenidate alter brain function, whereby regions with relatively higher inhibitory D2R (i.e., sensorimotor cortices) tend to have greater decreases in brain activity and connectivity compared to regions with relatively higher excitatory D1R (i.e., association cortices). They also support the importance of a balanced interaction between D1R and D2R in association cortices for cognitive function and its degradation with aging. Joint PET and MRI analyses of cortical D1 and D2 dopamine receptors in healthy adults provide a framework for understanding how dopamine-boosting drugs alter brain function.
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Continuous but not intermittent theta burst stimulation decreases striatal dopamine release and cortical excitability. Exp Neurol 2022; 354:114106. [DOI: 10.1016/j.expneurol.2022.114106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 04/12/2022] [Accepted: 05/01/2022] [Indexed: 11/22/2022]
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Atlas of type 2 dopamine receptors in the human brain: Age and sex dependent variability in a large PET cohort. Neuroimage 2022; 255:119149. [PMID: 35367652 DOI: 10.1016/j.neuroimage.2022.119149] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 03/22/2022] [Accepted: 03/24/2022] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND The dopamine system contributes to a multitude of functions ranging from reward and motivation to learning and movement control, making it a key component in goal-directed behavior. Altered dopaminergic function is observed in neurological and psychiatric conditions. Numerous factors have been proposed to influence dopamine function, but due to small sample sizes and heterogeneous data analysis methods in previous studies their specific and joint contributions remain unresolved. METHODS In this cross-sectional register-based study we investigated how age, sex, body mass index (BMI), as well as cerebral hemisphere and regional volume influence striatal type 2 dopamine receptor (D2R) availability in the human brain. We analyzed a large historical dataset (n=156, 120 males and 36 females) of [11C]raclopride PET scans performed between 2004 and 2018. RESULTS Striatal D2R availability decreased through age for both sexes (2-5 % in striatal ROIs per 10 years) and was higher in females versus males throughout age (7-8% in putamen). BMI and striatal D2R availability were weakly associated. There was no consistent lateralization of striatal D2R. The observed effects were independent of regional volumes. These results were validated using two different spatial normalization methods, and the age and sex effects also replicated in an independent sample (n=135). CONCLUSIONS D2R availability is dependent on age and sex, which may contribute to the vulnerability of neurological and psychiatric conditions involving altering D2R expression.
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Nordin K, Gorbach T, Pedersen R, Panes Lundmark V, Johansson J, Andersson M, McNulty C, Riklund K, Wåhlin A, Papenberg G, Kalpouzos G, Bäckman L, Salami A. DyNAMiC: A prospective longitudinal study of dopamine and brain connectomes: A new window into cognitive aging. J Neurosci Res 2022; 100:1296-1320. [PMID: 35293013 PMCID: PMC9313590 DOI: 10.1002/jnr.25039] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 01/18/2022] [Accepted: 02/16/2022] [Indexed: 11/07/2022]
Abstract
Concomitant exploration of structural, functional, and neurochemical brain mechanisms underlying age‐related cognitive decline is crucial in promoting healthy aging. Here, we present the DopamiNe, Age, connectoMe, and Cognition (DyNAMiC) project, a multimodal, prospective 5‐year longitudinal study spanning the adult human lifespan. DyNAMiC examines age‐related changes in the brain’s structural and functional connectome in relation to changes in dopamine D1 receptor availability (D1DR), and their associations to cognitive decline. Critically, due to the complete lack of longitudinal D1DR data, the true trajectory of one of the most age‐sensitive dopamine systems remains unknown. The first DyNAMiC wave included 180 healthy participants (20–80 years). Brain imaging included magnetic resonance imaging assessing brain structure (white matter, gray matter, iron), perfusion, and function (during rest and task), and positron emission tomography (PET) with the [11C]SCH23390 radioligand. A subsample (n = 20, >65 years) was additionally scanned with [11C]raclopride PET measuring D2DR. Age‐related variation was evident for multiple modalities, such as D1DR; D2DR, and performance across the domains of episodic memory, working memory, and perceptual speed. Initial analyses demonstrated an inverted u‐shaped association between D1DR and resting‐state functional connectivity across cortical network nodes, such that regions with intermediate D1DR levels showed the highest levels of nodal strength. Evident within each age group, this is the first observation of such an association across the adult lifespan, suggesting that emergent functional architecture depends on underlying D1DR systems. Taken together, DyNAMiC is the largest D1DR study worldwide, and will enable a comprehensive examination of brain mechanisms underlying age‐related cognitive decline.
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Affiliation(s)
- Kristin Nordin
- Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden.,Department of Integrative Medical Biology, Umeå University, Umeå, Sweden.,Wallenberg Centre for Molecular Medicine, Umeå University, Umeå, Sweden
| | - Tetiana Gorbach
- Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden.,Department of Integrative Medical Biology, Umeå University, Umeå, Sweden.,Wallenberg Centre for Molecular Medicine, Umeå University, Umeå, Sweden.,Umeå School of Business, Economics and Statistics, Umeå University, Umeå, Sweden
| | - Robin Pedersen
- Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden.,Department of Integrative Medical Biology, Umeå University, Umeå, Sweden.,Wallenberg Centre for Molecular Medicine, Umeå University, Umeå, Sweden
| | - Vania Panes Lundmark
- Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden.,Department of Integrative Medical Biology, Umeå University, Umeå, Sweden
| | - Jarkko Johansson
- Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden.,Wallenberg Centre for Molecular Medicine, Umeå University, Umeå, Sweden.,Department of Radiation Sciences, Umeå University, Umeå, Sweden
| | - Micael Andersson
- Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden.,Department of Integrative Medical Biology, Umeå University, Umeå, Sweden
| | - Charlotte McNulty
- Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden.,Department of Integrative Medical Biology, Umeå University, Umeå, Sweden.,Wallenberg Centre for Molecular Medicine, Umeå University, Umeå, Sweden
| | - Katrine Riklund
- Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden.,Department of Radiation Sciences, Umeå University, Umeå, Sweden
| | - Anders Wåhlin
- Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden.,Department of Radiation Sciences, Umeå University, Umeå, Sweden
| | - Goran Papenberg
- Aging Research Center, Karolinska Institutet & Stockholm University, Stockholm, Sweden
| | - Grégoria Kalpouzos
- Aging Research Center, Karolinska Institutet & Stockholm University, Stockholm, Sweden
| | - Lars Bäckman
- Aging Research Center, Karolinska Institutet & Stockholm University, Stockholm, Sweden
| | - Alireza Salami
- Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden.,Department of Integrative Medical Biology, Umeå University, Umeå, Sweden.,Wallenberg Centre for Molecular Medicine, Umeå University, Umeå, Sweden.,Aging Research Center, Karolinska Institutet & Stockholm University, Stockholm, Sweden
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17
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Giacobbo BL, Özalay Ö, Mediavilla T, Ericsson M, Axelsson J, Rieckmann A, Sultan F, Marcellino D. The Aged Striatum: Evidence of Molecular and Structural Changes Using a Longitudinal Multimodal Approach in Mice. Front Aging Neurosci 2022; 14:795132. [PMID: 35140600 PMCID: PMC8818755 DOI: 10.3389/fnagi.2022.795132] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 01/03/2022] [Indexed: 01/08/2023] Open
Abstract
To study the aging human brain requires significant resources and time. Thus, mice models of aging can provide insight into changes in brain biological functions at a fraction of the time when compared to humans. This study aims to explore changes in dopamine D1 and D2 receptor availability and of gray matter density in striatum during aging in mice and to evaluate whether longitudinal imaging in mice may serve as a model for normal brain aging to complement cross-sectional research in humans. Mice underwent repeated structural magnetic resonance imaging (sMRI), and [11C]Raclopride and [11C]SCH23390 positron emission tomography (PET) was performed on a subset of aging mice. PET and sMRI data were analyzed by binding potential (BPND), voxel- and tensor-based morphometry (VBM and TBM, respectively). Longitudinal PET revealed a significant reduction in striatal BPND for D2 receptors over time, whereas no significant change was found for D1 receptors. sMRI indicated a significant increase in modulated gray matter density (mGMD) over time in striatum, with limited clusters showing decreased mGMD. Mouse [11C]Raclopride data is compatible with previous reports in human cross-sectional studies, suggesting that a natural loss of dopaminergic D2 receptors in striatum can be assessed in mice, reflecting estimates from humans. No changes in D1 were found, which may be attributed to altered [11C]SCH23390 kinetics in anesthetized mice, suggesting that this tracer is not yet able to replicate human findings. sMRI revealed a significant increase in mGMD. Although contrary to expectations, this increase in modulated GM density may be attributed to an age-related increase in non-neuronal cells.
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Affiliation(s)
| | - Özgün Özalay
- Department of Integrative Medical Biology, Umeå University, Umeå, Sweden
| | - Tomas Mediavilla
- Department of Integrative Medical Biology, Umeå University, Umeå, Sweden
| | | | - Jan Axelsson
- Department of Radiation Sciences, Umeå University, Umeå, Sweden
| | - Anna Rieckmann
- Department of Integrative Medical Biology, Umeå University, Umeå, Sweden
- Department of Radiation Sciences, Umeå University, Umeå, Sweden
| | - Fahad Sultan
- Department of Integrative Medical Biology, Umeå University, Umeå, Sweden
| | - Daniel Marcellino
- Department of Integrative Medical Biology, Umeå University, Umeå, Sweden
- *Correspondence: Daniel Marcellino,
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18
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Ferraiolo M, Atik H, Ponthot R, Koener B, Hanson J, Hermans E. Dopamine D 2L receptor density influences the recruitment of β-arrestin2 and G i1 induced by antiparkinsonian drugs. Neuropharmacology 2022; 207:108942. [PMID: 35026287 DOI: 10.1016/j.neuropharm.2022.108942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 12/29/2021] [Accepted: 01/03/2022] [Indexed: 10/19/2022]
Abstract
INTRODUCTION Brain imaging studies have highlighted that the density of dopamine D2 receptors markedly fluctuates across the stages of Parkinson's disease and in response to pharmacological treatment. Moreover, receptor density constitutes a molecular determinant for the signaling profile of D2 receptor ligands. We therefore hypothesized that variations in receptor expression could influence D2 receptor response to antiparkinsonian drugs, most notably with respect to the recruitment bias between Gi1 and β-arrestin2. METHODS The recruitment bias of dopamine, pramipexole, ropinirole, and rotigotine was examined using a nanoluciferase-based biosensor for probing the interactions of the D2L receptor with either Gi1 or β-arrestin2. The characterization of the functional selectivity of these D2 receptor agonists was performed at two distinct D2L receptor densities by taking advantage of a cell model carrying an inducible system that enables the overexpression of the D2L receptor when exposed to doxycycline. RESULTS A high receptor density oriented the balanced signaling profile of dopamine towards a preferential recruitment of Gi1. It also moderated the marked Gi1 and β-arrestin2 biases of pramipexole and rotigotine, respectively. At variance, the Gi1 bias of ropinirole appeared as not being influenced by D2L receptor density. CONCLUSIONS Taken together, these observations highlight receptor density as a key driver of the signaling transducer recruitment triggered by antiparkinsonian agents. Moreover, given the putative beneficial properties of β-arrestin2 in promoting locomotion, this study provides molecular insights that position the arrestin-biased ligand rotigotine as a putatively more beneficial D2 receptor agonist for the treatment of early and late Parkinson's disease.
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Affiliation(s)
- Mattia Ferraiolo
- Neuropharmacology Laboratory - Institute of Neurosciences - UCLouvain, Brussels, Belgium
| | - Hicham Atik
- Neuropharmacology Laboratory - Institute of Neurosciences - UCLouvain, Brussels, Belgium
| | - Romane Ponthot
- Neuropharmacology Laboratory - Institute of Neurosciences - UCLouvain, Brussels, Belgium
| | - Beryl Koener
- Neuropharmacology Laboratory - Institute of Neurosciences - UCLouvain, Brussels, Belgium
| | - Julien Hanson
- Laboratory of Molecular Pharmacology - GIGA-Molecular Biology of Disease - ULiège, Liège, Belgium; Laboratory of Medicinal Chemistry - CIRM - ULiège, Liège, Belgium
| | - Emmanuel Hermans
- Neuropharmacology Laboratory - Institute of Neurosciences - UCLouvain, Brussels, Belgium.
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19
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Mitelman SA, Buchsbaum MS, Vyas NS, Christian BT, Merrill BM, Buchsbaum BR, Mitelman AM, Mukherjee J, Lehrer DS. Reading abilities and dopamine D 2/D 3 receptor availability: An inverted U-shaped association in subjects with schizophrenia. BRAIN AND LANGUAGE 2021; 223:105046. [PMID: 34763166 DOI: 10.1016/j.bandl.2021.105046] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 10/18/2021] [Accepted: 10/21/2021] [Indexed: 06/13/2023]
Abstract
Reading impairments are prominent trait-like features of cognitive deficits in schizophrenia, predictive of overall cognitive functioning and presumably linked to dopaminergic abnormalities. To evaluate this, we used 18F-fallypride PET in 19 healthy and 21 antipsychotic-naïve schizophrenia subjects and correlated dopamine receptor binding potentials in relevant AFNI-derived regions and voxelwise with group performance on WRAT4 single-word reading subtest. Healthy subjects' scores were positively and linearly associated with D2/D3 receptor availability in the rectus, orbital and superior frontal gyri, fusiform and middle temporal gyri, as well as middle occipital gyrus and precuneus, all predominantly in the left hemisphere and previously implicated in reading, hence suggesting that higher dopamine receptor density is cognitively advantageous. This relationship was weakened in schizophrenia subjects and in contrast to healthy participants followed an inverted U-shaped curve both in the cortex and dorsal striatum, indicating restricted optimal range of dopamine D2/D3 receptor availability for cognitive performance in schizophrenia.
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Affiliation(s)
- Serge A Mitelman
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Department of Psychiatry, Division of Child and Adolescent Psychiatry, Elmhurst Hospital Center, Elmhurst, NY, USA.
| | - Monte S Buchsbaum
- Departments of Psychiatry and Radiology, University of California San Diego, San Diego, USA; Department of Psychiatry and Human Behavior, University of California Irvine School of Medicine, Orange, CA, USA
| | - Nora S Vyas
- Kingston University London, Department of Psychology, Kingston upon Thames, Surrey, UK; Imperial College Healthcare NHS Trust, Charing Cross Hospital, Department of Nuclear Medicine, London, UK
| | - Bradley T Christian
- Waisman Laboratory for Brain Imaging and Behavior, University of Wisconsin-Madison, Madison, WI, USA
| | - Brian M Merrill
- Department of Psychiatry, Boonshoft School of Medicine, Wright State University, Dayton, OH, USA
| | - Bradley R Buchsbaum
- The Rotman Research Institute, Baycrest Centre for Geriatric Care and Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada
| | | | - Jogeshwar Mukherjee
- Department of Radiological Sciences, Preclinical Imaging, University of California, Irvine School of Medicine, USA
| | - Douglas S Lehrer
- Department of Psychiatry, Boonshoft School of Medicine, Wright State University, Dayton, OH, USA
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20
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Karalija N, Köhncke Y, Düzel S, Bertram L, Papenberg G, Demuth I, Lill CM, Johansson J, Riklund K, Lövdén M, Bäckman L, Nyberg L, Lindenberger U, Brandmaier AM. A common polymorphism in the dopamine transporter gene predicts working memory performance and in vivo dopamine integrity in aging. Neuroimage 2021; 245:118707. [PMID: 34742942 DOI: 10.1016/j.neuroimage.2021.118707] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 10/04/2021] [Accepted: 11/01/2021] [Indexed: 11/17/2022] Open
Abstract
Dopamine (DA) integrity is suggested as a potential cause of individual differences in working memory (WM) performance among older adults. Still, the principal dopaminergic mechanisms giving rise to WM differences remain unspecified. Here, 61 single-nucleotide polymorphisms, located in or adjacent to various dopamine-related genes, were assessed for their links to WM performance in a sample of 1313 adults aged 61-80 years from the Berlin Aging Study II. Least Absolute Shrinkage and Selection Operator (LASSO) regression was conducted to estimate associations between polymorphisms and WM. Rs40184 in the DA transporter gene, SLC6A3, showed allelic group differences in WM, with T-carriers performing better than C homozygotes (p<0.01). This finding was replicated in an independent sample from the Cognition, Brain, and Aging study (COBRA; baseline: n = 181, ages: 64-68 years; 5-year follow up: n = 129). In COBRA, in vivo DA integrity was measured with 11C-raclopride and positron emission tomography. Notably, WM as well as in vivo DA integrity was higher for rs40184 T-carriers at baseline (p<0.05 for WM and caudate and hippocampal D2-receptor availability) and at the 5-year follow-up (p<0.05 for WM and hippocampal D2 availability). Our findings indicate that individual differences in DA transporter function contribute to differences in WM performance in old age, presumably by regulating DA availability.
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Affiliation(s)
- Nina Karalija
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Berlin, Germany; Umeå center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden; Department of Radiation Sciences, Diagnostic Radiology, Umeå University, Umeå, Sweden.
| | - Ylva Köhncke
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Berlin, Germany
| | - Sandra Düzel
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Berlin, Germany
| | - Lars Bertram
- Lübeck Interdisciplinary Platform for Genome Analytics, University of Lübeck, Lübeck, Germany; Center for Lifespan Changes in Brain and Cognition, Department of Psychology, University of Oslo, Oslo, Norway
| | - Goran Papenberg
- Aging Research Center, Karolinska Institutet & Stockholm University, Solna, Sweden
| | - Ilja Demuth
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Department of Endocrinology and Metabolism, Berlin, Germany; Charité - Universitätsmedizin Berlin, BCRT - Berlin Institute of Health Center for Regenerative Therapies, Berlin, Germany
| | - Christina M Lill
- Lübeck Interdisciplinary Platform for Genome Analytics, University of Lübeck, Lübeck, Germany; Ageing Epidemiology Research Unit, School of Public Health, Imperial College London, London, UK
| | - Jarkko Johansson
- Umeå center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden; Department of Radiation Sciences, Diagnostic Radiology, Umeå University, Umeå, Sweden
| | - Katrine Riklund
- Umeå center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden; Department of Radiation Sciences, Diagnostic Radiology, Umeå University, Umeå, Sweden
| | - Martin Lövdén
- Department of psychology, University of Gothenburg, Gothenburg, Sweden
| | - Lars Bäckman
- Aging Research Center, Karolinska Institutet & Stockholm University, Solna, Sweden
| | - Lars Nyberg
- Umeå center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden; Department of Radiation Sciences, Diagnostic Radiology, Umeå University, Umeå, Sweden; Department of Integrative Medical Biology, Umeå University, Umeå, Sweden
| | - Ulman Lindenberger
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Berlin, Germany; Max Planck UCL Centre for Computational Psychiatry and Ageing Research, Berlin, Germany, and London, UK
| | - Andreas M Brandmaier
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Berlin, Germany; Max Planck UCL Centre for Computational Psychiatry and Ageing Research, Berlin, Germany, and London, UK
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21
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Korkki SM, Papenberg G, Karalija N, Garrett DD, Riklund K, Lövdén M, Lindenberger U, Nyberg L, Bäckman L. Fronto-striatal dopamine D2 receptor availability is associated with cognitive variability in older individuals with low dopamine integrity. Sci Rep 2021; 11:21089. [PMID: 34702857 PMCID: PMC8548594 DOI: 10.1038/s41598-021-00106-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Accepted: 09/30/2021] [Indexed: 11/09/2022] Open
Abstract
Within-person, moment-to-moment, variability in behavior increases with advancing adult age, potentially reflecting the influence of reduced structural and neurochemical brain integrity, especially that of the dopaminergic system. We examined the role of dopamine D2 receptor (D2DR) availability, grey-, and white-matter integrity, for between-person differences in cognitive variability in a large sample of healthy older adults (n = 181; 64-68 years) from the Cognition, Brain, and Aging (COBRA) study. Intra-individual variability (IIV) in cognition was measured as across-trial variability in participants' response times for tasks assessing perceptual speed and working memory, as well as for a control task of motor speed. Across the whole sample, no associations of D2DR availability, or grey- and white-matter integrity, to IIV were observed. However, within-person variability in cognition was increased in two subgroups of individuals displaying low mean-level cognitive performance, one of which was characterized by low subcortical and cortical D2DR availability. In this latter group, fronto-striatal D2DR availability correlated negatively with within-person variability in cognition. This finding suggests that the influence of D2DR availability on cognitive variability may be more easily disclosed among individuals with low dopamine-system integrity, highlighting the benefits of large-scale studies for delineating heterogeneity in brain-behavior associations in older age.
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Affiliation(s)
- Saana M. Korkki
- grid.10548.380000 0004 1936 9377Aging Research Center, Karolinska Institute and Stockholm University, Stockholm, Sweden
| | - Goran Papenberg
- grid.10548.380000 0004 1936 9377Aging Research Center, Karolinska Institute and Stockholm University, Stockholm, Sweden
| | - Nina Karalija
- grid.12650.300000 0001 1034 3451Department of Radiation Sciences, Diagnostic Radiology, Umeå University, Umeå, Sweden ,grid.12650.300000 0001 1034 3451Umeå Center for Functional Brain Imaging, Umeå University, Umeå, Sweden
| | - Douglas D. Garrett
- grid.419526.d0000 0000 9859 7917Center for Lifespan Psychology, Max Planck Institute for Human Development, Berlin, Germany ,grid.4372.20000 0001 2105 1091Max Planck UCL Centre for Computational Psychiatry and Ageing Research, Berlin, Germany
| | - Katrine Riklund
- grid.12650.300000 0001 1034 3451Department of Radiation Sciences, Diagnostic Radiology, Umeå University, Umeå, Sweden ,grid.12650.300000 0001 1034 3451Umeå Center for Functional Brain Imaging, Umeå University, Umeå, Sweden
| | - Martin Lövdén
- grid.8761.80000 0000 9919 9582Department of Psychology, University of Gothenburg, Gothenburg, Sweden
| | - Ulman Lindenberger
- grid.419526.d0000 0000 9859 7917Center for Lifespan Psychology, Max Planck Institute for Human Development, Berlin, Germany ,grid.4372.20000 0001 2105 1091Max Planck UCL Centre for Computational Psychiatry and Ageing Research, Berlin, Germany
| | - Lars Nyberg
- grid.12650.300000 0001 1034 3451Department of Radiation Sciences, Diagnostic Radiology, Umeå University, Umeå, Sweden ,grid.12650.300000 0001 1034 3451Umeå Center for Functional Brain Imaging, Umeå University, Umeå, Sweden ,grid.12650.300000 0001 1034 3451Department of Integrative Medical Biology, Umeå University, Umeå, Sweden
| | - Lars Bäckman
- grid.10548.380000 0004 1936 9377Aging Research Center, Karolinska Institute and Stockholm University, Stockholm, Sweden
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22
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Martins R, Oliveira F, Moreira F, Moreira AP, Abrunhosa A, Januário C, Castelo-Branco M. Automatic classification of idiopathic Parkinson's disease and atypical Parkinsonian syndromes combining [ 11C]raclopride PET uptake and MRI grey matter morphometry. J Neural Eng 2021; 18. [PMID: 33848996 DOI: 10.1088/1741-2552/abf772] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Accepted: 04/13/2021] [Indexed: 11/12/2022]
Abstract
Objective.To explore the viability of developing a computer-aided diagnostic system for Parkinsonian syndromes using dynamic [11C]raclopride positron emission tomography (PET) and T1-weighted magnetic resonance imaging (MRI) data.Approach.The biological heterogeneity of Parkinsonian syndromes renders their statistical classification a challenge. The unique combination of structural and molecular imaging data allowed different classifier designs to be tested. Datasets from dynamic [11C]raclopride PET and T1-weighted MRI scans were acquired from six groups of participants. There were healthy controls (CTRLn= 15), patients with Parkinson's disease (PDn= 27), multiple system atrophy (MSAn= 8), corticobasal degeneration (CBDn= 6), and dementia with Lewy bodies (DLBn= 5). MSA, CBD, and DLB patients were classified into one category designated as atypical Parkinsonism (AP). The distribution volume ratio (DVR) kinetic parameters obtained from the PET data were used to quantify the reversible tracer binding to D2/D3 receptors in the subcortical regions of interest (ROI). The grey matter (GM) volumes obtained from the MRI data were used to quantify GM atrophy across cortical, subcortical, and cerebellar ROI.Results.The classifiers CTRL vs PD and CTRL vs AP achieved the highest balanced accuracy combining DVR and GM (DVR-GM) features (96.7%, 92.1%, respectively), followed by the classifiers designed with DVR features (93.3%, 88.8%, respectively), and GM features (69.6%, 86.1%, respectively). In contrast, the classifier PD vs AP showed the highest balanced accuracy (78.9%) using DVR features only. The integration of DVR-GM (77.9%) and GM features (72.7%) produced inferior performances. The classifier CTRL vs PD vs AP showed high weighted balanced accuracy when DVR (80.5%) or DVR-GM features (79.9%) were integrated. GM features revealed poorer performance (59.5%).Significance.This work was unique in its combination of structural and molecular imaging features in binary and triple category classifications. We were able to demonstrate improved binary classification of healthy/diseased status (concerning both PD and AP) and equate performance to DVR features in multiclass classifications.
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Affiliation(s)
- Ricardo Martins
- Coimbra Institute for Biomedical Imaging and Translational Research (CIBIT), University of Coimbra, Coimbra, Portugal.,Institute of Nuclear Sciences Applied to Health (ICNAS), University of Coimbra, Coimbra, Portugal
| | - Francisco Oliveira
- Institute of Nuclear Sciences Applied to Health (ICNAS), University of Coimbra, Coimbra, Portugal.,Champalimaud Research, Champalimaud Centre for the Unknown, Lisbon, Portugal
| | - Fradique Moreira
- Coimbra Institute for Biomedical Imaging and Translational Research (CIBIT), University of Coimbra, Coimbra, Portugal.,Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,Department of Neurology, Hospital and University Centre of Coimbra, Coimbra, Portugal
| | - Ana Paula Moreira
- Coimbra Institute for Biomedical Imaging and Translational Research (CIBIT), University of Coimbra, Coimbra, Portugal.,Institute of Nuclear Sciences Applied to Health (ICNAS), University of Coimbra, Coimbra, Portugal.,Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Antero Abrunhosa
- Coimbra Institute for Biomedical Imaging and Translational Research (CIBIT), University of Coimbra, Coimbra, Portugal.,Institute of Nuclear Sciences Applied to Health (ICNAS), University of Coimbra, Coimbra, Portugal
| | - Cristina Januário
- Coimbra Institute for Biomedical Imaging and Translational Research (CIBIT), University of Coimbra, Coimbra, Portugal.,Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,Department of Neurology, Hospital and University Centre of Coimbra, Coimbra, Portugal
| | - Miguel Castelo-Branco
- Coimbra Institute for Biomedical Imaging and Translational Research (CIBIT), University of Coimbra, Coimbra, Portugal.,Institute of Nuclear Sciences Applied to Health (ICNAS), University of Coimbra, Coimbra, Portugal.,Faculty of Medicine, University of Coimbra, Coimbra, Portugal
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23
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Smigielski L, Wotruba D, Treyer V, Rössler J, Papiol S, Falkai P, Grünblatt E, Walitza S, Rössler W. The Interplay Between Postsynaptic Striatal D2/3 Receptor Availability, Adversity Exposure and Odd Beliefs: A [11C]-Raclopride PET Study. Schizophr Bull 2021; 47:1495-1508. [PMID: 33876249 PMCID: PMC8379534 DOI: 10.1093/schbul/sbab034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
BACKGROUND Between unaffected mental health and diagnosable psychiatric disorders, there is a vast continuum of functioning. The hypothesized link between striatal dopamine signaling and psychosis has guided a prolific body of research. However, it has been understudied in the context of multiple interacting factors, subclinical phenotypes, and pre-postsynaptic dynamics. METHOD This work investigated psychotic-like experiences and D2/3 dopamine postsynaptic receptor availability in the dorsal striatum, quantified by in vivo [11C]-raclopride positron emission tomography, in a sample of 24 healthy male individuals. Additional mediation and moderation effects with childhood trauma and key dopamine-regulating genes were examined. RESULTS An inverse relationship between nondisplaceable binding potential and subclinical symptoms was identified. D2/3 receptor availability in the left putamen fully mediated the association between traumatic childhood experiences and odd beliefs, that is, inclinations to see meaning in randomness and unfounded interpretations. Moreover, the effect of early adversity was moderated by a DRD2 functional variant (rs1076560). The results link environmental and neurobiological influences in the striatum to the origination of psychosis spectrum symptomology, consistent with the social defeat and diathesis-stress models. CONCLUSIONS Adversity exposure may affect the dopamine system as in association with biases in probabilistic reasoning, attributional style, and salience processing. The inverse relationship between D2/3 availability and symptomology may be explained by endogenous dopamine occupying the receptor, postsynaptic compensatory mechanisms, and/or altered receptor sensitivity. This may also reflect a cognitively stabilizing mechanism in non-help-seeking individuals. Future research should comprehensively characterize molecular parameters of dopamine neurotransmission along the psychosis spectrum and according to subtype profiling.
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Affiliation(s)
- Lukasz Smigielski
- Department of Psychiatry, Psychotherapy and Psychosomatics, Psychiatric University Hospital Zurich, Zurich Program for Sustainable Development of Mental Health Services (ZInEP), University of Zurich, Zurich, Switzerland,Department of Child and Adolescent Psychiatry and Psychotherapy, Psychiatric University Hospital Zurich, University of Zurich, Zurich, Switzerland,To whom correspondence should be addressed; Psychiatric University Hospital Zurich, Militärstrasse 8, 8004 Zurich, Switzerland; tel: +044-296-73-94, fax: +044-296-74-69, e-mail:
| | - Diana Wotruba
- Collegium Helveticum, University of Zurich and ETH Zurich, Zurich, Switzerland
| | - Valerie Treyer
- Department of Nuclear Medicine, University Hospital Zurich, Zurich, Switzerland,Institute for Regenerative Medicine, University of Zurich, Schlieren, Switzerland
| | - Julian Rössler
- Institute of Anesthesiology, University Hospital Zurich, Zurich, Switzerland
| | - Sergi Papiol
- Institute of Psychiatric Phenomics and Genomics, University Hospital, Ludwig Maximilian University, Munich, Germany,Department of Psychiatry and Psychotherapy, University Hospital, Ludwig Maximilian University, Munich, Germany
| | - Peter Falkai
- Department of Psychiatry and Psychotherapy, University Hospital, Ludwig Maximilian University, Munich, Germany
| | - Edna Grünblatt
- Department of Child and Adolescent Psychiatry and Psychotherapy, Psychiatric University Hospital Zurich, University of Zurich, Zurich, Switzerland,Neuroscience Center Zurich, University of Zurich and ETH Zurich, Zurich, Switzerland,Zurich Center for Integrative Human Physiology, University of Zurich, Zurich, Switzerland
| | - Susanne Walitza
- Department of Child and Adolescent Psychiatry and Psychotherapy, Psychiatric University Hospital Zurich, University of Zurich, Zurich, Switzerland,Neuroscience Center Zurich, University of Zurich and ETH Zurich, Zurich, Switzerland,Zurich Center for Integrative Human Physiology, University of Zurich, Zurich, Switzerland
| | - Wulf Rössler
- Department of Psychiatry, Psychotherapy and Psychosomatics, Psychiatric University Hospital Zurich, Zurich Program for Sustainable Development of Mental Health Services (ZInEP), University of Zurich, Zurich, Switzerland,Department of Psychiatry and Psychotherapy, Charité Universitätsmedizin, Campus Charité Mitte, Berlin, Germany,Laboratory of Neuroscience (LIM 27), Institute of Psychiatry, University of São Paulo, São Paulo, Brazil
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24
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Effects of age differences in memory formation on neural mechanisms of consolidation and retrieval. Semin Cell Dev Biol 2021; 116:135-145. [PMID: 33676853 DOI: 10.1016/j.semcdb.2021.02.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 02/08/2021] [Accepted: 02/25/2021] [Indexed: 11/20/2022]
Abstract
Episodic memory decline is a hallmark of cognitive aging and a multifaceted phenomenon. We review studies that target age differences across different memory processing stages, i.e., from encoding to retrieval. The available evidence suggests that age differences during memory formation may affect the quality of memory representations in an age-graded manner with downstream consequences for later processing stages. We argue that low memory quality in combination with age-related neural decline of key regions of the episodic memory network puts older adults in a double jeopardy situation that finally results in broader memory impairments in older compared to younger adults.
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25
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Freiburghaus T, Svensson JE, Matheson GJ, Plavén-Sigray P, Lundberg J, Farde L, Cervenka S. Low convergent validity of [ 11C]raclopride binding in extrastriatal brain regions: A PET study of within-subject correlations with [ 11C]FLB 457. Neuroimage 2020; 226:117523. [PMID: 33144221 DOI: 10.1016/j.neuroimage.2020.117523] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 10/24/2020] [Accepted: 10/26/2020] [Indexed: 11/16/2022] Open
Abstract
Dopamine D2 receptors (D2-R) in extrastriatal brain regions are of high interest for research in a wide range of psychiatric and neurologic disorders. Pharmacological competition studies and test-retest experiments have shown high validity and reliability of the positron emission tomography (PET) radioligand [11C]FLB 457 for D2-R quantification in extrastriatal brain regions. However, this radioligand is not available at most research centers. Instead, the medium affinity radioligand [11C]raclopride, which has been extensively validated for quantification of D2-R in the high-density region striatum, has been applied also in studies on extrastriatal D2-R. Recently, the validity of this approach has been questioned by observations of low occupancy of [11C]raclopride in extrastriatal regions in a pharmacological competition study with quetiapine. Here, we utilise a data set of 16 healthy control subjects examined with both [11C]raclopride and [11C]FLB 457 to assess the correlation in binding potential (BPND) in extrastriatal brain regions. BPND was quantified using the simplified reference tissue model with cerebellum as reference region. The rank order of mean regional BPND values were similar for both radioligands, and corresponded to previously reported data, both post-mortem and using PET. Nevertheless, weak to moderate within-subject correlations were observed between [11C]raclopride and [11C]FLB 457 BPND extrastriatally (Pearson's R: 0.30-0.56), in contrast to very strong correlations between repeated [11C]FLB 457 measurements (Pearson's R: 0.82-0.98). In comparison, correlations between repeated [11C]raclopride measurements were low to moderate (Pearson's R: 0.28-0.75). These results are likely related to low signal to noise ratio of [11C]raclopride in extrastriatal brain regions, and further strengthen the recommendation that extrastriatal D2-R measures obtained with [11C]raclopride should be interpreted with caution.
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Affiliation(s)
- Tove Freiburghaus
- Centre for Psychiatry Research, Department of Clinical Neuroscience, Karolinska Institutet and Stockholm Health Care Services, Region Stockholm, Stockholm SE -171 76, Sweden.
| | - Jonas E Svensson
- Centre for Psychiatry Research, Department of Clinical Neuroscience, Karolinska Institutet and Stockholm Health Care Services, Region Stockholm, Stockholm SE -171 76, Sweden
| | - Granville J Matheson
- Centre for Psychiatry Research, Department of Clinical Neuroscience, Karolinska Institutet and Stockholm Health Care Services, Region Stockholm, Stockholm SE -171 76, Sweden
| | - Pontus Plavén-Sigray
- Centre for Psychiatry Research, Department of Clinical Neuroscience, Karolinska Institutet and Stockholm Health Care Services, Region Stockholm, Stockholm SE -171 76, Sweden; Neurobiology Research Unit, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Johan Lundberg
- Centre for Psychiatry Research, Department of Clinical Neuroscience, Karolinska Institutet and Stockholm Health Care Services, Region Stockholm, Stockholm SE -171 76, Sweden
| | - Lars Farde
- Centre for Psychiatry Research, Department of Clinical Neuroscience, Karolinska Institutet and Stockholm Health Care Services, Region Stockholm, Stockholm SE -171 76, Sweden
| | - Simon Cervenka
- Centre for Psychiatry Research, Department of Clinical Neuroscience, Karolinska Institutet and Stockholm Health Care Services, Region Stockholm, Stockholm SE -171 76, Sweden
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26
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Karalija N, Jonassson L, Johansson J, Papenberg G, Salami A, Andersson M, Riklund K, Nyberg L, Boraxbekk CJ. High long-term test-retest reliability for extrastriatal 11C-raclopride binding in healthy older adults. J Cereb Blood Flow Metab 2020; 40:1859-1868. [PMID: 31506011 PMCID: PMC7446562 DOI: 10.1177/0271678x19874770] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In vivo dopamine D2-receptor availability is frequently assessed with 11C-raclopride and positron emission tomography. Due to low signal-to-noise ratios for 11C-raclopride in areas with low D2 receptor densities, the ligand has been considered unreliable for measurements outside the dopamine-dense striatum. Intriguingly, recent studies show that extrastriatal 11C-raclopride binding potential (BPND) values are (i) reliably higher than in the cerebellum (where D2-receptor levels are negligible), (ii) correlate with behavior in the expected direction, and (iii) showed good test-retest reliability in a sample of younger adults. The present work demonstrates high seven-month test-retest reliability of striatal and extrastriatal 11C-raclopride BPND values in healthy, older adults (n = 27, age: 64-78 years). Mean 11C-raclopride BPND values were stable between test sessions in subcortical nuclei, and in frontal and temporal cortices (p > 0.05). Across all structures analyzed, intraclass correlation coefficients were high (0.85-0.96), absolute variability was low (mean: 4-8%), and coefficients of variance ranged between 9 and 25%. Furthermore, regional 11C-raclopride BPND values correlated with previously determined 18F-fallypride BPND values (ρ = 0.97 and 0.92 in correlations with and without striatal values, respectively, p < 0.01) and postmortem determined D2-receptor densities (including striatum: ρ = 0.92; p < 0.001; excluding striatum: ρ = 0.75; p = 0.067). These observations suggest that extrastriatal 11C-raclopride measurements represent a true D2 signal.
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Affiliation(s)
- Nina Karalija
- Department of Radiation Sciences, Umeå University, Umeå, Sweden.,Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden
| | - Lars Jonassson
- Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden.,Department of Integrative Medical Biology, Umeå University, Umeå, Sweden
| | - Jarkko Johansson
- Department of Radiation Sciences, Umeå University, Umeå, Sweden.,Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden
| | - Goran Papenberg
- Aging Research Center, Karolinska Institutet and Stockholm University, Stockholm, Sweden
| | - Alireza Salami
- Department of Radiation Sciences, Umeå University, Umeå, Sweden.,Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden.,Department of Integrative Medical Biology, Umeå University, Umeå, Sweden.,Aging Research Center, Karolinska Institutet and Stockholm University, Stockholm, Sweden.,Wallenberg Centre for Molecular Medicine, Lund, Sweden
| | - Micael Andersson
- Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden.,Department of Integrative Medical Biology, Umeå University, Umeå, Sweden
| | - Katrine Riklund
- Department of Radiation Sciences, Umeå University, Umeå, Sweden.,Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden
| | - Lars Nyberg
- Department of Radiation Sciences, Umeå University, Umeå, Sweden.,Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden.,Department of Integrative Medical Biology, Umeå University, Umeå, Sweden
| | - Carl-Johan Boraxbekk
- Department of Radiation Sciences, Umeå University, Umeå, Sweden.,Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden.,Danish Research Center for Magnetic Resonance, Center for Functional and Diagnostic Imaging and Research, Copenhagen University Hospital, Hvidovre, Denmark
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27
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Wächtler CO, Chakroun K, Clos M, Bayer J, Hennies N, Beaulieu JM, Sommer T. Region-specific effects of acute haloperidol in the human midbrain, striatum and cortex. Eur Neuropsychopharmacol 2020; 35:126-135. [PMID: 32439227 DOI: 10.1016/j.euroneuro.2020.04.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 03/24/2020] [Accepted: 04/23/2020] [Indexed: 12/30/2022]
Abstract
D2 autoreceptors provide an important regulatory mechanism of dopaminergic neurotransmission. However, D2 receptors are also expressed as heteroreceptors at postsynaptic membranes. The expression and the functional characteristics of both, D2 auto- and heteroreceptors, differ between brain regions. Therefore, one would expect that also the net response to a D2 antagonist, i.e. whether and to what degree overall neural activity increases or decreases, varies across brain areas. In the current study we systematically tested this hypothesis by parametrically increasing haloperidol levels (placebo, 2 and 3 mg) in healthy volunteers and measuring brain activity in the three major dopaminergic pathways. In particular, activity was assessed using fMRI while participants performed a working memory and a reinforcement learning task. Consistent with the hypothesis, across brain regions activity parametrically in- and decreased. Moreover, even within the same area there were function-specific concurrent de- and increases of activity, likely caused by input from upstream dopaminergic regions. In the ventral striatum, for instance, activity during reinforcement learning decreased for outcome processing while prediction error related activity increased. In conclusion, the current study highlights the intricacy of D2 neurotransmission which makes it difficult to predict the function-specific net response of a given area to pharmacological manipulations.
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Affiliation(s)
- Christian Ole Wächtler
- Institute of Systems Neuroscience, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Karima Chakroun
- Institute of Systems Neuroscience, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Mareike Clos
- Institute of Systems Neuroscience, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Janine Bayer
- Institute of Systems Neuroscience, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Nora Hennies
- Institute of Systems Neuroscience, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Jean Martin Beaulieu
- Department of Pharmacology and Toxicology, Faculty of medicine, University of Toronto, Toronto, Canada
| | - Tobias Sommer
- Institute of Systems Neuroscience, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
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