1
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Bruzzone SEP, Ozenne B, Fisher PM, Ortega G, Jensen PS, Dam VH, Svarer C, Knudsen GM, Lesch KP, Frokjaer VG. No association between peripheral serotonin-gene-related DNA methylation and brain serotonin neurotransmission in the healthy and depressed state. Clin Epigenetics 2024; 16:71. [PMID: 38802956 PMCID: PMC11131311 DOI: 10.1186/s13148-024-01678-y] [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: 01/19/2024] [Accepted: 05/06/2024] [Indexed: 05/29/2024] Open
Abstract
BACKGROUND Methylation of serotonin-related genes has been proposed as a plausible gene-by-environment link which may mediate environmental stress, depressive and anxiety symptoms. DNA methylation is often measured in blood cells, but little is known about the association between this peripheral epigenetic modification and brain serotonergic architecture. Here, we evaluated the association between whole-blood-derived methylation of four CpG sites in the serotonin transporter (SLC6A4) and six CpG sites of the tryptophan hydroxylase 2 (TPH2) gene and in-vivo brain levels of serotonin transporter (5-HTT) and serotonin 4 receptor (5-HT4) in a cohort of healthy individuals (N = 254) and, for 5-HT4, in a cohort of unmedicated patients with depression (N = 90). To do so, we quantified SLC6A4/TPH2 methylation using bisulfite pyrosequencing and estimated brain 5-HT4 and 5-HTT levels using positron emission tomography. In addition, we explored the association between SLC6A4 and TPH2 methylation and measures of early life and recent stress, depressive and anxiety symptoms on 297 healthy individuals. RESULTS We found no statistically significant association between peripheral DNA methylation and brain markers of serotonergic neurotransmission in patients with depression or in healthy individuals. In addition, although SLC6A4 CpG2 (chr17:30,236,083) methylation was marginally associated with the parental bonding inventory overprotection score in the healthy cohort, statistical significance did not remain after accounting for blood cell heterogeneity. CONCLUSIONS We suggest that findings on peripheral DNA methylation in the context of brain serotonin-related features should be interpreted with caution. More studies are needed to rule out a role of SLC6A4 and TPH2 methylation as biomarkers for environmental stress, depressive or anxiety symptoms.
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Affiliation(s)
- S E P Bruzzone
- Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - B Ozenne
- Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
- Department of Public Health, Section of Biostatistics, University of Copenhagen, Copenhagen, Denmark
| | - P M Fisher
- Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
- Department of Drug Design and Pharmacology, University of Copenhagen, Copenhagen, Denmark
| | - G Ortega
- Division of Molecular Psychiatry, Center of Mental Health, University Hospital Würzburg, Würzburg, Germany
| | - P S Jensen
- Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - V H Dam
- Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - C Svarer
- Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - G M Knudsen
- Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - K P Lesch
- Division of Molecular Psychiatry, Center of Mental Health, University Hospital Würzburg, Würzburg, Germany
- Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience (MHeNs), Maastricht University, 6229 ER, Maastricht, The Netherlands
| | - V G Frokjaer
- Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark.
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
- Psychiatric Centre Copenhagen, Mental Health Services, Frederiksberg, Capital Region of Denmark, Denmark.
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2
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Cuomo A, Barillà G, Cattolico M, Pardossi S, Mariantoni E, Koukouna D, Carmellini P, Fagiolini A. Perspectives on the impact of vortioxetine on the treatment armamentarium of major depressive disorder. Expert Rev Neurother 2024; 24:465-476. [PMID: 38536761 DOI: 10.1080/14737175.2024.2333394] [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: 11/12/2023] [Accepted: 03/18/2024] [Indexed: 04/18/2024]
Abstract
INTRODUCTION Major Depressive Disorder (MDD) is a mental health issue that significantly affects patients' quality of life and functioning. Despite available treatments, many patients continue to suffer due to incomplete symptom resolution and side effects. AREAS COVERED This manuscript examines Vortioxetine's role in Major Depressive Disorder (MDD) treatment, highlighting its potential to reshape therapeutic strategies due to its unique Multimodal action and proven broad-spectrum efficacy in multiple depressive domains. A detailed examination of Vortioxetine's pharmacological aspects, including indications, dosage, pharmacodynamics, and pharmacokinetics, is provided, emphasizing its safety and effectiveness. The discussion extends to Vortioxetine's role in acute-phase treatment and maintenance of MDD and its profound impact on specialized depression domains. EXPERT OPINION Vortioxetine is distinguished for its novel multimodal serotonin modulation mechanism, showcasing significant promise as an innovative treatment for MDD. Its efficacy, which is dose-dependent, along with a commendable tolerability profile, positions it as a potential leading option for initial treatment strategies. The discourse on dosage titration, particularly the strategy of initiating treatment at lower doses followed by gradual escalation, underscores the approach toward minimizing initial adverse effects while optimizing therapeutic outcomes, aligning with the principles of personalized medicine in psychiatric care.
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3
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Bruzzone SEP, Nasser A, Aripaka SS, Spies M, Ozenne B, Jensen PS, Knudsen GM, Frokjaer VG, Fisher PM. Genetic contributions to brain serotonin transporter levels in healthy adults. Sci Rep 2023; 13:16426. [PMID: 37777558 PMCID: PMC10542378 DOI: 10.1038/s41598-023-43690-x] [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: 03/28/2023] [Accepted: 09/27/2023] [Indexed: 10/02/2023] Open
Abstract
The serotonin transporter (5-HTT) critically shapes serotonin neurotransmission by regulating extracellular brain serotonin levels; it remains unclear to what extent 5-HTT levels in the human brain are genetically determined. Here we applied [11C]DASB positron emission tomography to image brain 5-HTT levels and evaluated associations with five common serotonin-related genetic variants that might indirectly regulate 5-HTT levels (BDNF rs6265, SLC6A4 5-HTTLPR, HTR1A rs6295, HTR2A rs7333412, and MAOA rs1137070) in 140 healthy volunteers. In addition, we explored whether these variants could predict in vivo 5-HTT levels using a five-fold cross-validation random forest framework. MAOA rs1137070 T-carriers showed significantly higher brain 5-HTT levels compared to C-homozygotes (2-11% across caudate, putamen, midbrain, thalamus, hippocampus, amygdala and neocortex). We did not observe significant associations for the HTR1A rs6295 and HTR2A rs7333412 genotypes. Our previously observed lower subcortical 5-HTT availability for rs6265 met-carriers remained in the presence of these additional variants. Despite this significant association, our prediction models showed that genotype moderately improved prediction of 5-HTT in caudate, but effects were not statistically significant after adjustment for multiple comparisons. Our observations provide additional evidence that serotonin-related genetic variants modulate adult human brain serotonin neurotransmission.
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Affiliation(s)
- Silvia Elisabetta Portis Bruzzone
- Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
- Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Arafat Nasser
- Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - Sagar Sanjay Aripaka
- Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
- Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Marie Spies
- Department of Psychiatry and Psychotherapy, Medical University of Vienna, Vienna, Austria
| | - Brice Ozenne
- Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
- Department of Public Health, Section of Biostatistics, University of Copenhagen, Copenhagen, Denmark
| | - Peter Steen Jensen
- Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - Gitte Moos Knudsen
- Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
- Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Vibe Gedsoe Frokjaer
- Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
- Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
- Psychiatric Centre Copenhagen, Copenhagen, Denmark
| | - Patrick MacDonald Fisher
- Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark.
- Department of Drug Design and Pharmacology, University of Copenhagen, Copenhagen, Denmark.
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4
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Chou KL, Dayalu P, Koeppe RA, Gilman S, Spears CC, Albin RL, Kotagal V. Serotonin Transporter Imaging in Multiple System Atrophy and Parkinson's Disease. Mov Disord 2022; 37:2301-2307. [PMID: 36102173 PMCID: PMC9669145 DOI: 10.1002/mds.29220] [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: 04/15/2022] [Revised: 08/10/2022] [Accepted: 08/18/2022] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND Both Parkinson's disease (PD) and multiple system atrophy (MSA) exhibit degeneration of brainstem serotoninergic nuclei, affecting multiple subcortical and cortical serotoninergic projections. In MSA, medullary serotoninergic neuron pathology is well documented, but serotonin system changes throughout the rest of the brain are less well characterized. OBJECTIVES To use serotonin transporter [11 C]3-amino-4-(2-dimethylaminomethyl-phenylsulfaryl)-benzonitrile positron emission tomography (PET) to compare serotoninergic innervation in patients with MSA and PD. METHODS We performed serotonin transporter PET imaging in 18 patients with MSA, 23 patients with PD, and 16 healthy controls to explore differences in brainstem, subcortical, and cortical regions of interest. RESULTS Patients with MSA showed lower serotonin transporter distribution volume ratios compared with patients with PD in the medulla, raphe pontis, ventral striatum, limbic cortex, and thalamic regions, but no differences in the dorsal striatal, ventral anterior cingulate, or total cortical regions. Controls showed greater cortical serotonin transporter binding compared with PD or MSA groups but lower serotonin transporter binding in the striatum and other relevant basal ganglia regions. There were no regional differences in binding between patients with MSA-parkinsonian subtype (n = 8) and patients with MSA-cerebellar subtype (n = 10). Serotonin transporter distribution volume ratios in multiple different regions of interest showed an inverse correlation with the severity of Movement Disorders Society Unified Parkinson's Disease Rating Scale motor score in patients with MSA but not patients with PD. CONCLUSIONS Brainstem and some forebrain subcortical region serotoninergic deficits are more severe in MSA compared with PD and show an MSA-specific correlation with the severity of motor impairments. © 2022 The Authors. Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society.
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Affiliation(s)
- Kelvin L. Chou
- Department of NeurologyUniversity of MichiganAnn ArborMichiganUSA,University of Michigan Udall CenterAnn ArborMichiganUSA
| | - Praveen Dayalu
- Department of NeurologyUniversity of MichiganAnn ArborMichiganUSA
| | - Robert A. Koeppe
- Division of Nuclear Medicine, Department of RadiologyUniversity of MichiganAnn ArborMichiganUSA
| | - Sid Gilman
- Department of NeurologyUniversity of MichiganAnn ArborMichiganUSA
| | | | - Roger L. Albin
- Department of NeurologyUniversity of MichiganAnn ArborMichiganUSA,University of Michigan Udall CenterAnn ArborMichiganUSA,Veterans Affairs Ann Arbor Health System (VAAAHS) and VAAAHS Geriatric Research Education and Clinical CenterAnn ArborMichiganUSA,University of Michigan Parkinson's Foundation Research Center of ExcellenceAnn ArborMichiganUSA
| | - Vikas Kotagal
- Department of NeurologyUniversity of MichiganAnn ArborMichiganUSA,Division of Nuclear Medicine, Department of RadiologyUniversity of MichiganAnn ArborMichiganUSA
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Fu H, Rong J, Chen Z, Zhou J, Collier T, Liang SH. Positron Emission Tomography (PET) Imaging Tracers for Serotonin Receptors. J Med Chem 2022; 65:10755-10808. [PMID: 35939391 DOI: 10.1021/acs.jmedchem.2c00633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Serotonin (5-hydroxytryptamine, 5-HT) and 5-HT receptors (5-HTRs) have crucial roles in various neuropsychiatric disorders and neurodegenerative diseases, making them attractive diagnostic and therapeutic targets. Positron emission tomography (PET) is a noninvasive nuclear molecular imaging technique and is an essential tool in clinical diagnosis and drug discovery. In this context, numerous PET ligands have been developed for "visualizing" 5-HTRs in the brain and translated into human use to study disease mechanisms and/or support drug development. Herein, we present a comprehensive repertoire of 5-HTR PET ligands by focusing on their chemotypes and performance in PET imaging studies. Furthermore, this Perspective summarizes recent 5-HTR-focused drug discovery, including biased agonists and allosteric modulators, which would stimulate the development of more potent and subtype-selective 5-HTR PET ligands and thus further our understanding of 5-HTR biology.
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Affiliation(s)
- Hualong Fu
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Jian Rong
- Division of Nuclear Medicine and Molecular Imaging, Massachusetts General Hospital, Boston, Massachusetts 02114, United States.,Department of Radiology, Harvard Medical School, Boston, Massachusetts 02115, United States
| | - Zhen Chen
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Chemical Engineering, Nanjing Forestry University, Nanjing, Jiangsu 210037, China
| | - Jingyin Zhou
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Thomas Collier
- Division of Nuclear Medicine and Molecular Imaging, Massachusetts General Hospital, Boston, Massachusetts 02114, United States.,Department of Radiology, Harvard Medical School, Boston, Massachusetts 02115, United States
| | - Steven H Liang
- Division of Nuclear Medicine and Molecular Imaging, Massachusetts General Hospital, Boston, Massachusetts 02114, United States.,Department of Radiology, Harvard Medical School, Boston, Massachusetts 02115, United States
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6
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Mangeant R, Dubost E, Cailly T, Collot V. Radiotracers for the Central Serotoninergic System. Pharmaceuticals (Basel) 2022; 15:ph15050571. [PMID: 35631397 PMCID: PMC9143978 DOI: 10.3390/ph15050571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 04/27/2022] [Accepted: 04/28/2022] [Indexed: 12/10/2022] Open
Abstract
This review lists the most important radiotracers described so far for imaging the central serotoninergic system. Single-photon emission computed tomography and positron emission tomography radiotracers are reviewed and critically discussed for each receptor.
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Affiliation(s)
- Reynald Mangeant
- Centre d’Etudes et de Recherche sur le Médicament de Normandie (CERMN), UNICAEN, Normandie Univ., 14000 Caen, France; (R.M.); (E.D.)
- Institut Blood and Brain @ Caen Normandie (BB@C), Boulevard Henri Becquerel, 14000 Caen, France
| | - Emmanuelle Dubost
- Centre d’Etudes et de Recherche sur le Médicament de Normandie (CERMN), UNICAEN, Normandie Univ., 14000 Caen, France; (R.M.); (E.D.)
- Institut Blood and Brain @ Caen Normandie (BB@C), Boulevard Henri Becquerel, 14000 Caen, France
| | - Thomas Cailly
- Centre d’Etudes et de Recherche sur le Médicament de Normandie (CERMN), UNICAEN, Normandie Univ., 14000 Caen, France; (R.M.); (E.D.)
- Institut Blood and Brain @ Caen Normandie (BB@C), Boulevard Henri Becquerel, 14000 Caen, France
- UNICAEN, IMOGERE, Normandie Univ., 14000 Caen, France
- CHU Côte de Nacre, Department of Nuclear Medicine, 14000 Caen, France
- Correspondence: (T.C.); (V.C.)
| | - Valérie Collot
- Centre d’Etudes et de Recherche sur le Médicament de Normandie (CERMN), UNICAEN, Normandie Univ., 14000 Caen, France; (R.M.); (E.D.)
- Institut Blood and Brain @ Caen Normandie (BB@C), Boulevard Henri Becquerel, 14000 Caen, France
- Correspondence: (T.C.); (V.C.)
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7
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Prange S, Metereau E, Maillet A, Klinger H, Schmitt E, Lhommée E, Bichon A, Lancelot S, Meoni S, Broussolle E, Castrioto A, Tremblay L, Krack P, Thobois S. Limbic Serotonergic Plasticity Contributes to the Compensation of Apathy in Early Parkinson's Disease. Mov Disord 2022; 37:1211-1221. [PMID: 35238430 DOI: 10.1002/mds.28971] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 02/07/2022] [Accepted: 02/08/2022] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND De novo Parkinson's disease (PD) patients with apathy exhibit prominent limbic serotonergic dysfunction and microstructural disarray. Whether this distinctive lesion profile at diagnosis entails different prognosis remains unknown. OBJECTIVES To investigate the progression of dopaminergic and serotonergic dysfunction and their relation to motor and nonmotor impairment in PD patients with or without apathy at diagnosis. METHODS Thirteen de novo apathetic and 13 nonapathetic PD patients were recruited in a longitudinal double-tracer positron emission tomography cohort study. We quantified the progression of presynaptic dopaminergic and serotonergic pathology using [11 C]PE2I for dopamine transporter and [11 C]DASB for serotonin transporter at baseline and 3 to 5 years later, using linear mixed-effect models and mediation analysis to compare the longitudinal evolution between groups for clinical impairment and region-of-interest-based analysis. RESULTS After the initiation of dopamine replacement therapy, apathy, depression, and anxiety improved at follow-up in patients with apathy at diagnosis (n = 10) to the level of patients without apathy (n = 11). Patients had similar progression of motor impairment, whereas mild impulsive behaviors developed in both groups. Striato-pallidal and mesocorticolimbic presynaptic dopaminergic loss progressed similarly in both groups, as did serotonergic pathology in the putamen, caudate nucleus, and pallidum. Contrastingly, serotonergic innervation selectively increased in the ventral striatum and anterior cingulate cortex in apathetic patients, contributing to the reversal of apathy besides dopamine replacement therapy. CONCLUSION Patients suffering from apathy at diagnosis exhibit compensatory changes in limbic serotonergic innervation within 5 years of diagnosis, with promising evidence that serotonergic plasticity contributes to the reversal of apathy. The relationship between serotonergic plasticity and dopaminergic treatments warrants further longitudinal investigations. © 2022 International Parkinson and Movement Disorder Society.
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Affiliation(s)
- Stéphane Prange
- Institut des Sciences Cognitives Marc Jeannerod, CNRS, UMR 5229, Univ Lyon, Bron, France.,Service de Neurologie C, Centre Expert Parkinson NS-PARK/FCRIN Network, Hospices Civils de Lyon, Hôpital Neurologique Pierre Wertheimer, Bron, France
| | - Elise Metereau
- Institut des Sciences Cognitives Marc Jeannerod, CNRS, UMR 5229, Univ Lyon, Bron, France.,Service de Neurologie C, Centre Expert Parkinson NS-PARK/FCRIN Network, Hospices Civils de Lyon, Hôpital Neurologique Pierre Wertheimer, Bron, France
| | - Audrey Maillet
- Institut des Sciences Cognitives Marc Jeannerod, CNRS, UMR 5229, Univ Lyon, Bron, France
| | - Hélène Klinger
- Service de Neurologie C, Centre Expert Parkinson NS-PARK/FCRIN Network, Hospices Civils de Lyon, Hôpital Neurologique Pierre Wertheimer, Bron, France
| | - Emmanuelle Schmitt
- Inserm, U1216, CHU Grenoble Alpes, Unité Troubles du Mouvement, Grenoble Institut Neurosciences, Univ. Grenoble Alpes, Grenoble, France
| | - Eugénie Lhommée
- Inserm, U1216, CHU Grenoble Alpes, Unité Troubles du Mouvement, Grenoble Institut Neurosciences, Univ. Grenoble Alpes, Grenoble, France
| | - Amélie Bichon
- Inserm, U1216, CHU Grenoble Alpes, Unité Troubles du Mouvement, Grenoble Institut Neurosciences, Univ. Grenoble Alpes, Grenoble, France
| | - Sophie Lancelot
- CNRS UMR5292, INSERM U1028, Univ. Lyon 1, Lyon Neuroscience Research Center, Université de Lyon, Lyon, France.,Hospices Civils de Lyon, Lyon, France.,CERMEP-Imaging Platform, Groupement Hospitalier Est, Bron, France
| | - Sara Meoni
- Inserm, U1216, CHU Grenoble Alpes, Unité Troubles du Mouvement, Grenoble Institut Neurosciences, Univ. Grenoble Alpes, Grenoble, France
| | - Emmanuel Broussolle
- Institut des Sciences Cognitives Marc Jeannerod, CNRS, UMR 5229, Univ Lyon, Bron, France.,Service de Neurologie C, Centre Expert Parkinson NS-PARK/FCRIN Network, Hospices Civils de Lyon, Hôpital Neurologique Pierre Wertheimer, Bron, France.,Faculté de Médecine et de Maïeutique Lyon Sud Charles Mérieux, Univ Lyon, Université Claude Bernard Lyon 1, Oullins, France
| | - Anna Castrioto
- Inserm, U1216, CHU Grenoble Alpes, Unité Troubles du Mouvement, Grenoble Institut Neurosciences, Univ. Grenoble Alpes, Grenoble, France
| | - Léon Tremblay
- Institut des Sciences Cognitives Marc Jeannerod, CNRS, UMR 5229, Univ Lyon, Bron, France
| | - Paul Krack
- Department of Neurology, University Hospital Bern, University of Bern, Bern, Switzerland
| | - Stéphane Thobois
- Institut des Sciences Cognitives Marc Jeannerod, CNRS, UMR 5229, Univ Lyon, Bron, France.,Service de Neurologie C, Centre Expert Parkinson NS-PARK/FCRIN Network, Hospices Civils de Lyon, Hôpital Neurologique Pierre Wertheimer, Bron, France.,Faculté de Médecine et de Maïeutique Lyon Sud Charles Mérieux, Univ Lyon, Université Claude Bernard Lyon 1, Oullins, France
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8
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Sørensen A, Ruhé HG, Munkholm K. The relationship between dose and serotonin transporter occupancy of antidepressants-a systematic review. Mol Psychiatry 2022; 27:192-201. [PMID: 34548628 PMCID: PMC8960396 DOI: 10.1038/s41380-021-01285-w] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 08/11/2021] [Accepted: 08/25/2021] [Indexed: 11/09/2022]
Abstract
Brain imaging techniques enable the visualization of serotonin transporter (SERT) occupancy as a measure of the proportion of SERT blocked by an antidepressant at a given dose. We aimed to systematically review the evidence on the relationship between antidepressant dose and SERT occupancy. We searched PubMed and Embase (last search 20 May 2021) for human in vivo, within-subject PET, or SPECT studies measuring SERT occupancy at any dose of any antidepressant with highly selective radioligands ([11C]-DASB, [123I]-ADAM, and [11C]-MADAM). We summarized and visualized the dose-occupancy relationship for antidepressants across studies, overlaying the plots with a curve based on predicted values of a standard 2-parameter Michaelis-Menten model fitted using the observed data. We included seventeen studies of 10 different SSRIs, SNRIs, and serotonin modulators comprising a total of 294 participants, involving 309 unique occupancy measures. Overall, following the Michaelis-Menten equation, SERT occupancy increased with a higher dose in a hyperbolic relationship, with occupancy increasing rapidly at lower doses and reaching a plateau at approximately 80% at the usual minimum recommended dose. All the studies were small, only a few investigated the same antidepressant, dose, and brain region, and few reported information on factors that may influence SERT occupancy. The hyperbolic dose-occupancy relationship may provide mechanistic insight of relevance to the limited clinical benefit of dose-escalation in antidepressant treatment and the potential emergence of withdrawal symptoms. The evidence is limited by non-transparent reporting, lack of standardized methods, small sample sizes, and short treatment duration. Future studies should standardize the imaging and reporting procedures, measure occupancy at lower antidepressant doses, and investigate the moderators of the dose-occupancy relationship.
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Affiliation(s)
- Anders Sørensen
- Nordic Cochrane Centre, Rigshospitalet, Copenhagen, Denmark.
| | - Henricus G. Ruhé
- grid.10417.330000 0004 0444 9382Department of Psychiatry, Radboudumc, Nijmegen, The Netherlands ,grid.5590.90000000122931605Donders Institute for Brain, Cognition and Behavior, Radboud University, Nijmegen, The Netherlands
| | - Klaus Munkholm
- grid.10825.3e0000 0001 0728 0170Centre for Evidence-Based Medicine Odense (CEBMO) and Cochrane Denmark, Department of Clinical Research, University of Southern Denmark, Odense, Denmark ,grid.7143.10000 0004 0512 5013Open Patient data Exploratory Network (OPEN), Odense University Hospital, Odense, Denmark
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9
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Hjorth OR, Frick A, Gingnell M, Hoppe JM, Faria V, Hultberg S, Alaie I, Månsson KNT, Wahlstedt K, Jonasson M, Lubberink M, Antoni G, Fredrikson M, Furmark T. Expression and co-expression of serotonin and dopamine transporters in social anxiety disorder: a multitracer positron emission tomography study. Mol Psychiatry 2021; 26:3970-3979. [PMID: 31822819 DOI: 10.1038/s41380-019-0618-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 11/20/2019] [Accepted: 11/21/2019] [Indexed: 11/09/2022]
Abstract
Serotonin and dopamine are putatively involved in the etiology and treatment of anxiety disorders, but positron emission tomography (PET) studies probing the two neurotransmitters in the same individuals are lacking. The aim of this multitracer PET study was to evaluate the regional expression and co-expression of the transporter proteins for serotonin (SERT) and dopamine (DAT) in patients with social anxiety disorder (SAD). Voxel-wise binding potentials (BPND) for SERT and DAT were determined in 27 patients with SAD and 43 age- and sex-matched healthy controls, using the radioligands [11C]DASB (3-amino-4-(2-dimethylaminomethylphenylsulfanyl)-benzonitrile) and [11C]PE2I (N-(3-iodopro-2E-enyl)-2beta-carbomethoxy-3beta-(4'-methylphenyl)nortropane). Results showed that, within transmitter systems, SAD patients exhibited higher SERT binding in the nucleus accumbens while DAT availability in the amygdala, hippocampus, and putamen correlated positively with symptom severity. At a more lenient statistical threshold, SERT and DAT BPND were also higher in other striatal and limbic regions in patients, and correlated with symptom severity, whereas no brain region showed higher binding in healthy controls. Moreover, SERT/DAT co-expression was significantly higher in SAD patients in the amygdala, nucleus accumbens, caudate, putamen, and posterior ventral thalamus, while lower co-expression was noted in the dorsomedial thalamus. Follow-up logistic regression analysis confirmed that SAD diagnosis was significantly predicted by the statistical interaction between SERT and DAT availability, in the amygdala, putamen, and dorsomedial thalamus. Thus, SAD was associated with mainly increased expression and co-expression of the transporters for serotonin and dopamine in fear and reward-related brain regions. Resultant monoamine dysregulation may underlie SAD symptomatology and constitute a target for treatment.
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Affiliation(s)
- Olof R Hjorth
- Department of Psychology, Uppsala University, Uppsala, Sweden.
| | - Andreas Frick
- Department of Psychology, Uppsala University, Uppsala, Sweden.,The Beijer Laboratory, Department of Neuroscience, Psychiatry, Uppsala University, Uppsala, Sweden.,Department of Neuroscience, Psychiatry, Uppsala University, Uppsala, Sweden
| | - Malin Gingnell
- Department of Psychology, Uppsala University, Uppsala, Sweden.,Department of Neuroscience, Psychiatry, Uppsala University, Uppsala, Sweden
| | - Johanna M Hoppe
- Department of Psychology, Uppsala University, Uppsala, Sweden
| | - Vanda Faria
- Department of Psychology, Uppsala University, Uppsala, Sweden.,Center for Pain and the Brain, Department of Anesthesiology Perioperative and Pain Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA.,Smell & Taste Clinic, Department of Otorhinolaryngology, TU Dresden, Dresden, Germany
| | - Sara Hultberg
- Department of Psychology, Uppsala University, Uppsala, Sweden
| | - Iman Alaie
- Department of Neuroscience, Child and Adolescent Psychiatry, Uppsala University, Uppsala, Sweden
| | - Kristoffer N T Månsson
- Centre for Lifespan Psychology, Max Planck Institute for Human Development, Berlin, Germany.,Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden.,Max Planck UCL Centre for Computational Psychiatry and Ageing Research, Berlin, Germany
| | - Kurt Wahlstedt
- Department of Psychology, Uppsala University, Uppsala, Sweden
| | - My Jonasson
- Department of Surgical Sciences-Nuclear medicine and PET, Uppsala University, Uppsala, Sweden
| | - Mark Lubberink
- Department of Surgical Sciences-Nuclear medicine and PET, Uppsala University, Uppsala, Sweden
| | - Gunnar Antoni
- Department of Medicinal Chemistry, Uppsala University, Uppsala, Sweden
| | - Mats Fredrikson
- Department of Psychology, Uppsala University, Uppsala, Sweden.,Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Tomas Furmark
- Department of Psychology, Uppsala University, Uppsala, Sweden
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10
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de Natale ER, Wilson H, Politis M. Serotonergic imaging in Parkinson's disease. PROGRESS IN BRAIN RESEARCH 2021; 261:303-338. [PMID: 33785134 DOI: 10.1016/bs.pbr.2020.11.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Parkinson's disease (PD) is a neurodegenerative disorder characterized by the progressive degeneration of monoaminergic central pathways such as the serotonergic. The degeneration of serotonergic signaling in striatal and extrastriatal brain regions is an early feature of PD and is associated with several motor and non-motor complications of the disease. Molecular imaging techniques with Positron Emission Tomography (PET) have greatly contributed to the investigation of biological changes in vivo and to the understanding of the extent of serotonergic pathology in patients or individuals at risk for PD. Such discoveries provide with opportunities for the identification of new targets that can be used for the development of novel disease-modifying drugs or symptomatic treatments. Future studies of imaging serotonergic molecular targets will better clarify the importance of serotonergic pathology in PD, including progression of pathology, target-identification for pharmacotherapy, and relevance to endogenous synaptic serotonin levels. In this article, we review the current status and understanding of serotonergic imaging in PD.
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Affiliation(s)
| | - Heather Wilson
- Neurodegeneration Imaging Group, University of Exeter Medical School, London, United Kingdom
| | - Marios Politis
- Neurodegeneration Imaging Group, University of Exeter Medical School, London, United Kingdom.
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11
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Markers for the central serotonin system correlate to verbal ability and paralinguistic social voice processing in autism spectrum disorder. Sci Rep 2020; 10:14558. [PMID: 32883965 PMCID: PMC7471326 DOI: 10.1038/s41598-020-71254-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Accepted: 08/12/2020] [Indexed: 01/06/2023] Open
Abstract
Impairment in verbal communication abilities has been reported in autism spectrum disorder (ASD). Dysfunction of the serotonergic system has also been reported in ASD. However, it is still unknown how the brain serotonergic system relates to impairment in verbal communication abilities in individuals with ASD. In the present study, we investigated the correlation between brain serotonergic condition and brain sensitivity to paralinguistic stimuli (i.e., amplitude in the human voice prosodic change-evoked mismatch field) measured by magnetoencephalography (MEG) or verbal ability in 10 adults with ASD. To estimate the brain serotonergic condition, we measured the serotonin transporter nondisplaceable binding potential cerebrum-wide using positron emission tomography with [11C]N,N-dimethyl-2-(2-amino-4-cyanophenylthio)benzylamine ([11C] DASB). The results demonstrated a significant positive correlation between brain activity to paralinguistic stimuli and brain serotonin transporter binding potential in the left lingual gyrus, left fusiform gyrus and left calcarine cortex. In addition, there were significant positive correlations between verbal ability and serotonergic condition in the right anterior insula, right putamen and right central operculum. These results suggested that the occipital cortex is implicated in recognition of the prosodic change in ASD, whereas the right insula-involved serotonergic system is important in nurturing verbal function in ASD.Trial registration: UMIN000011077.
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12
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Visualization of translocator protein (18 kDa) (TSPO) in the retina of diabetic retinopathy rats using fluorine-18-DPA-714. Ann Nucl Med 2020; 34:675-681. [DOI: 10.1007/s12149-020-01495-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Accepted: 06/22/2020] [Indexed: 12/08/2022]
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13
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Nørgaard M, Ganz M, Svarer C, Frokjaer VG, Greve DN, Strother SC, Knudsen GM. Different preprocessing strategies lead to different conclusions: A [ 11C]DASB-PET reproducibility study. J Cereb Blood Flow Metab 2020; 40:1902-1911. [PMID: 31575336 PMCID: PMC7446563 DOI: 10.1177/0271678x19880450] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Positron emission tomography (PET) neuroimaging provides unique possibilities to study biological processes in vivo under basal and interventional conditions. For quantification of PET data, researchers commonly apply different arrays of sequential data analytic methods ("preprocessing pipeline"), but it is often unknown how the choice of preprocessing affects the final outcome. Here, we use an available data set from a double-blind, randomized, placebo-controlled [11C]DASB-PET study as a case to evaluate how the choice of preprocessing affects the outcome of the study. We tested the impact of 384 commonly used preprocessing strategies on a previously reported positive association between the change from baseline in neocortical serotonin transporter binding determined with [11C]DASB-PET, and change in depressive symptoms, following a pharmacological sex hormone manipulation intervention in 30 women. The two preprocessing steps that were most critical for the outcome were motion correction and kinetic modeling of the dynamic PET data. We found that 36% of the applied preprocessing strategies replicated the originally reported finding (p < 0.05). For preprocessing strategies with motion correction, the replication percentage was 72%, whereas it was 0% for strategies without motion correction. In conclusion, the choice of preprocessing strategy can have a major impact on a study outcome.
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Affiliation(s)
- Martin Nørgaard
- Neurobiology Research Unit, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.,Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Melanie Ganz
- Neurobiology Research Unit, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.,Department of Computer Science, University of Copenhagen, Copenhagen, Denmark
| | - Claus Svarer
- Neurobiology Research Unit, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Vibe G Frokjaer
- Neurobiology Research Unit, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Douglas N Greve
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Stephen C Strother
- Rotman Research Institute, Baycrest, Department of Medical Biophysics, University of Toronto, Toronto, Canada
| | - Gitte M Knudsen
- Neurobiology Research Unit, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.,Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
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14
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Allen TEH, Wedlake AJ, Gelžinytė E, Gong C, Goodman JM, Gutsell S, Russell PJ. Neural network activation similarity: a new measure to assist decision making in chemical toxicology. Chem Sci 2020; 11:7335-7348. [PMID: 34123016 PMCID: PMC8159362 DOI: 10.1039/d0sc01637c] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Accepted: 06/23/2020] [Indexed: 12/03/2022] Open
Abstract
Deep learning neural networks, constructed for the prediction of chemical binding at 79 pharmacologically important human biological targets, show extremely high performance on test data (accuracy 92.2 ± 4.2%, MCC 0.814 ± 0.093 and ROC-AUC 0.96 ± 0.04). A new molecular similarity measure, Neural Network Activation Similarity, has been developed, based on signal propagation through the network. This is complementary to standard Tanimoto similarity, and the combined use increases confidence in the computer's prediction of activity for new chemicals by providing a greater understanding of the underlying justification. The in silico prediction of these human molecular initiating events is central to the future of chemical safety risk assessment and improves the efficiency of safety decision making.
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Affiliation(s)
- Timothy E H Allen
- MRC Toxicology Unit, University of Cambridge Hodgkin Building, Lancaster Road Leicester LE1 7HB UK
- Centre for Molecular Informatics, Department of Chemistry, University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Andrew J Wedlake
- Centre for Molecular Informatics, Department of Chemistry, University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Elena Gelžinytė
- Centre for Molecular Informatics, Department of Chemistry, University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Charles Gong
- Centre for Molecular Informatics, Department of Chemistry, University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Jonathan M Goodman
- Centre for Molecular Informatics, Department of Chemistry, University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Steve Gutsell
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park Sharnbrook Bedfordshire MK44 1LQ UK
| | - Paul J Russell
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park Sharnbrook Bedfordshire MK44 1LQ UK
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15
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Arakawa R, Takano A, Halldin C. PET technology for drug development in psychiatry. Neuropsychopharmacol Rep 2020; 40:114-121. [PMID: 32463584 PMCID: PMC7722687 DOI: 10.1002/npr2.12084] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 10/05/2019] [Accepted: 10/18/2019] [Indexed: 12/14/2022] Open
Abstract
Positron emission tomography (PET) is a non‐invasive imaging method to measure the molecule in vivo. PET imaging can evaluate the central nervous system drugs as target engagement in the human brain. For antipsychotic drugs, adequate dopamine D2 receptor occupancy (“therapeutic window”) is reported to be from 65%‐70% to 80% to achieve the antipsychotic effect without extrapyramidal symptoms. For antidepressants, the clinical threshold of serotonin transporter (5‐HTT) occupancy is reported to be 70%‐80% although the relation between the side effect and 5‐HTT occupancy has not yet been established. Evaluation of norepinephrine transporter (NET) occupancy for antidepressant is ongoing as adequate PET radioligands for NET were developed recently. Measurement of the target occupancy has been a key element to evaluate the in vivo target engagement of the drugs. In order to evaluate new drug targets for disease conditions such as negative symptoms/cognitive impairment of schizophrenia and treatment‐resistant depression, new PET radioligands need to be developed concurrently with the drug development. PET imaging can evaluate the central nervous system drugs as target engagement in the human brain. The uptake of [11C]raclopride for dopamine D2 receptors decreased from (A) baseline to (B) antipsychotic administration conditions.![]()
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Affiliation(s)
- Ryosuke Arakawa
- Center for Psychiatry Research, Department of Clinical Neuroscience, Karolinska Institutet and Stockholm County Council, Stockholm, Sweden
| | - Akihiro Takano
- Center for Psychiatry Research, Department of Clinical Neuroscience, Karolinska Institutet and Stockholm County Council, Stockholm, Sweden.,Takeda Development Center Japan, Takeda Pharmaceutical Company Limited, Osaka, Japan
| | - Christer Halldin
- Center for Psychiatry Research, Department of Clinical Neuroscience, Karolinska Institutet and Stockholm County Council, Stockholm, Sweden
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16
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Differentially Expressed Genes of the Slc6a Family as Markers of Altered Brain Neurotransmitter System Function in Pathological States in Mice. ACTA ACUST UNITED AC 2020. [DOI: 10.1007/s11055-019-00888-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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17
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Nørgaard M, Ganz M, Svarer C, Frokjaer VG, Greve DN, Strother SC, Knudsen GM. Optimization of preprocessing strategies in Positron Emission Tomography (PET) neuroimaging: A [ 11C]DASB PET study. Neuroimage 2019; 199:466-479. [PMID: 31158479 DOI: 10.1016/j.neuroimage.2019.05.055] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Revised: 03/21/2019] [Accepted: 05/21/2019] [Indexed: 11/26/2022] Open
Abstract
Positron Emission Tomography (PET) is an important neuroimaging tool to quantify the distribution of specific molecules in the brain. The quantification is based on a series of individually designed data preprocessing steps (pipeline) and an optimal preprocessing strategy is per definition associated with less noise and improved statistical power, potentially allowing for more valid neurobiological interpretations. In spite of this, it is currently unclear how to design the best preprocessing pipeline and to what extent the choice of each preprocessing step in the pipeline minimizes subject-specific errors. To evaluate the impact of various preprocessing strategies, we systematically examined 384 different pipeline strategies in data from 30 healthy participants scanned twice with the serotonin transporter (5-HTT) radioligand [11C]DASB. Five commonly used preprocessing steps with two to four options were investigated: (1) motion correction (MC) (2) co-registration (3) delineation of volumes of interest (VOI's) (4) partial volume correction (PVC), and (5) kinetic modeling. To quantitatively compare and evaluate the impact of various preprocessing strategies, we used the performance metrics: test-retest bias, within- and between-subject variability, the intraclass-correlation coefficient, and global signal-to-noise ratio. We also performed a power analysis to estimate the required sample size to detect either a 5% or 10% difference in 5-HTT binding as a function of preprocessing pipeline. The results showed a complex downstream dependency between the various preprocessing steps on the performance metrics. The choice of MC had the most profound effect on 5-HTT binding, prior to the effects caused by PVC and kinetic modeling, and the effects differed across VOI's. Notably, we observed a negative bias in 5-HTT binding across test and retest in 98% of pipelines, ranging from 0 to 6% depending on the pipeline. Optimization of the performance metrics revealed a trade-off in within- and between-subject variability at the group-level with opposite effects (i.e. minimization of within-subject variability increased between-subject variability and vice versa). The sample size required to detect a given effect size was also compromised by the preprocessing strategy, resulting in up to 80% increases in sample size needed to detect a 5% difference in 5-HTT binding. This is the first study to systematically investigate and demonstrate the effect of choosing different preprocessing strategies on the outcome of dynamic PET studies. We provide a framework to show how optimal and maximally powered neuroimaging results can be obtained by choosing appropriate preprocessing strategies and we provide recommendations depending on the study design. In addition, the results contribute to a better understanding of methodological uncertainty and variability in preprocessing decisions for future group- and/or longitudinal PET studies.
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Affiliation(s)
- Martin Nørgaard
- Neurobiology Research Unit, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark; Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Melanie Ganz
- Neurobiology Research Unit, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark; Department of Computer Science, University of Copenhagen, Copenhagen, Denmark
| | - Claus Svarer
- Neurobiology Research Unit, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Vibe G Frokjaer
- Neurobiology Research Unit, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Douglas N Greve
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Stephen C Strother
- Rotman Research Institute, Baycrest, Department of Medical Biophysics, University of Toronto, Toronto, Canada
| | - Gitte M Knudsen
- Neurobiology Research Unit, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark; Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
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18
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PET imaging of the mouse brain reveals a dynamic regulation of SERT density in a chronic stress model. Transl Psychiatry 2019; 9:80. [PMID: 30745564 PMCID: PMC6370816 DOI: 10.1038/s41398-019-0416-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 12/08/2018] [Accepted: 01/17/2019] [Indexed: 01/15/2023] Open
Abstract
The serotonin transporter (SERT, Slc6a4) plays an important role in the regulation of serotonergic neurotransmission and its aberrant expression has been linked to several psychiatric conditions. While SERT density has been proven to be amenable to in vivo quantitative evaluation by positron emission tomography (PET) in humans, this approach is in its infancy for rodents. Here we set out to evaluate the feasibility of using small-animal PET employing [11C]DASB ([11C]-3-amino-4-(2-dimethylaminomethyl-phenylsulfanyl)-benzonitrile) as a radiotracer to measure SERT density in designated areas of the mouse brain. Using Slc6a4+/+, Slc6a4+/-, and Slc6a4-/- mice as a genetic model of different SERT expression levels, we showed the feasibility of SERT imaging in the mouse brain with [11C]DASB-PET. The PET analysis was complemented by an evaluation of SERT protein expression using western blot, which revealed a highly significant correlation between in vivo and ex vivo measurements. [11C]DASB-PET was then applied to the examination of dynamic changes of SERT levels in different brain areas in the chronic corticosterone mouse model of chronic stress. The observed significant reduction in SERT density in corticosterone-treated mice was independently validated by and correlated with western blot analysis. This is the first demonstration of a quantitative in vivo evaluation of SERT density in subregions of the mouse brain using [11C]DASB-PET. The evidenced decrease in SERT density in response to chronic corticosterone treatment adds a new dimension to the complex involvement of SERT in the pathophysiology of stress-induced mental illnesses.
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19
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Nørgaard M, Ganz M, Svarer C, Feng L, Ichise M, Lanzenberger R, Lubberink M, Parsey RV, Politis M, Rabiner EA, Slifstein M, Sossi V, Suhara T, Talbot PS, Turkheimer F, Strother SC, Knudsen GM. Cerebral serotonin transporter measurements with [ 11C]DASB: A review on acquisition and preprocessing across 21 PET centres. J Cereb Blood Flow Metab 2019; 39:210-222. [PMID: 29651896 PMCID: PMC6365604 DOI: 10.1177/0271678x18770107] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Positron Emission Tomography (PET) imaging has become a prominent tool to capture the spatiotemporal distribution of neurotransmitters and receptors in the brain. The outcome of a PET study can, however, potentially be obscured by suboptimal and/or inconsistent choices made in complex processing pipelines required to reach a quantitative estimate of radioligand binding. Variations in subject selection, experimental design, data acquisition, preprocessing, and statistical analysis may lead to different outcomes and neurobiological interpretations. We here review the approaches used in 105 original research articles published by 21 different PET centres, using the tracer [11C]DASB for quantification of cerebral serotonin transporter binding, as an exemplary case. We highlight and quantify the impact of the remarkable variety of ways in which researchers are currently conducting their studies, while implicitly expecting generalizable results across research groups. Our review provides evidence that the foundation for a given choice of a preprocessing pipeline seems to be an overlooked aspect in modern PET neuroscience. Furthermore, we believe that a thorough testing of pipeline performance is necessary to produce reproducible research outcomes, avoiding biased results and allowing for better understanding of human brain function.
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Affiliation(s)
- Martin Nørgaard
- 1 Neurobiology Research Unit, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.,2 Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Melanie Ganz
- 1 Neurobiology Research Unit, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.,3 Department of Computer Science, University of Copenhagen, Copenhagen, Denmark
| | - Claus Svarer
- 1 Neurobiology Research Unit, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Ling Feng
- 1 Neurobiology Research Unit, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Masanori Ichise
- 4 Department of Functional Brain Imaging Research, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
| | - Rupert Lanzenberger
- 5 Department of Psychiatry and Psychotherapy, Medical University of Vienna, Vienna, Austria
| | - Mark Lubberink
- 6 Department of Nuclear Medicine and Positron Emission Tomography, Uppsala University, Uppsala, Sweden
| | - Ramin V Parsey
- 7 Department of Psychiatry, School of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Marios Politis
- 8 Neurodegeneration Imaging Group, Institute of Psychiatry, Psychology and Neuroscience (IoPPN), King's College London, London, UK
| | - Eugenii A Rabiner
- 9 Imanova Limited, London, UK.,10 Centre for Neuroimaging Sciences, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Mark Slifstein
- 7 Department of Psychiatry, School of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Vesna Sossi
- 11 Department of Physics and Astronomy, University of British Columbia, Vancouver, BC, Canada
| | - Tetsuya Suhara
- 4 Department of Functional Brain Imaging Research, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
| | - Peter S Talbot
- 12 Division of Neuroscience and Experimental Psychology, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | | | - Stephen C Strother
- 14 Rotman Research Institute at Baycrest, University of Toronto, Toronto, Canada
| | - Gitte M Knudsen
- 1 Neurobiology Research Unit, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.,2 Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
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20
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Strafella AP, Bohnen NI, Pavese N, Vaillancourt DE, van Eimeren T, Politis M, Tessitore A, Ghadery C, Lewis S. Imaging Markers of Progression in Parkinson's Disease. Mov Disord Clin Pract 2018; 5:586-596. [PMID: 30637278 DOI: 10.1002/mdc3.12673] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 07/22/2018] [Accepted: 07/30/2018] [Indexed: 12/12/2022] Open
Abstract
Background Parkinson's disease (PD) is the second-most common neurodegenerative disorder after Alzheimer's disease; however, to date, there is no approved treatment that stops or slows down disease progression. Over the past decades, neuroimaging studies, including molecular imaging and MRI are trying to provide insights into the mechanisms underlying PD. Methods This work utilized a literature review. Results It is now becoming clear that these imaging modalities can provide biomarkers that can objectively detect brain changes related to PD and monitor these changes as the disease progresses, and these biomarkers are required to establish a breakthrough in neuroprotective or disease-modifying therapeutics. Conclusions Here, we provide a review of recent observations deriving from PET, single-positron emission tomography, and MRI studies exploring PD and other parkinsonian disorders.
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Affiliation(s)
- Antonio P Strafella
- Morton and Gloria Shulman Movement Disorder Unit & E.J. Safra Parkinson Disease Program, Neurology Division, Department of Medicine, Toronto Western Hospital, UHN University of Toronto Toronto Ontario Canada.,Division of Brain, Imaging and Behaviour-Systems Neuroscience, Krembil Research Institute, UHN University of Toronto Toronto Ontario Canada.,Research Imaging Centre, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health University of Toronto Toronto Ontario Canada
| | - Nico I Bohnen
- Department of Radiology & Neurology University of Michigan Ann Arbor Michigan USA.,Veterans Administration Ann Arbor Healthcare System Ann Arbor Michigan USA.,Morris K. Udall Center of Excellence for Parkinson's Disease Research University of Michigan Ann Arbor Michigan USA
| | - Nicola Pavese
- Newcastle Magnetic Resonance Centre & Positron Emission Tomography Centre Newcastle University, Campus for Ageing & Vitality Newcastle upon Tyne United Kingdom
| | - David E Vaillancourt
- Applied Physiology and Kinesiology, Biomedical Engineering, and Neurology University of Florida Gainesville Florida USA
| | - Thilo van Eimeren
- Department of Nuclear Medicine and Department of Neurology University of Cologne Cologne Germany.,Institute for Cognitive Neuroscience, Jülich Research Centre Jülich Germany.,German Center for Neurodegenerative Diseases (DZNE) Bonn-Cologne Bonn Germany
| | - Marios Politis
- Neurodegeneration Imaging Group (NIG), Institute of Psychiatry, Psychology and Neuroscience (IoPPN), King's College London London United Kingdom
| | - Alessandro Tessitore
- Department of Medical, Surgical, Neurological, Metabolic and Aging Sciences-MRI Research Center SUN-FISM University of Campania "Luigi Vanvitelli" Naples Italy
| | - Christine Ghadery
- Morton and Gloria Shulman Movement Disorder Unit & E.J. Safra Parkinson Disease Program, Neurology Division, Department of Medicine, Toronto Western Hospital, UHN University of Toronto Toronto Ontario Canada.,Division of Brain, Imaging and Behaviour-Systems Neuroscience, Krembil Research Institute, UHN University of Toronto Toronto Ontario Canada.,Research Imaging Centre, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health University of Toronto Toronto Ontario Canada
| | - Simon Lewis
- Parkinson's Disease Research Clinic, Brain and Mind Centre University of Sydney Sydney NSW Australia
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21
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Liu F, Zhu L, Choi SR, Plössl K, Zha Z, Kung HF. Deuterium-substituted 2-(2′-((dimethylamino)methyl)-4′-[18
F](fluoropropoxy)phenylthio)benzenamine as a serotonin transporter imaging agent. J Labelled Comp Radiopharm 2018; 61:576-585. [DOI: 10.1002/jlcr.3626] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 03/28/2018] [Accepted: 03/29/2018] [Indexed: 01/06/2023]
Affiliation(s)
- Futao Liu
- Key Laboratory of Radiopharmaceuticals, Ministry of Education; Beijing Normal University; Beijing P. R. China
- Department of Radiology; University of Pennsylvania; Philadelphia Pennsylvania USA
| | - Lin Zhu
- Key Laboratory of Radiopharmaceuticals, Ministry of Education; Beijing Normal University; Beijing P. R. China
| | - Seok Rye Choi
- Department of Radiology; University of Pennsylvania; Philadelphia Pennsylvania USA
| | - Karl Plössl
- Department of Radiology; University of Pennsylvania; Philadelphia Pennsylvania USA
| | - Zhihao Zha
- Department of Radiology; University of Pennsylvania; Philadelphia Pennsylvania USA
| | - Hank F. Kung
- Department of Radiology; University of Pennsylvania; Philadelphia Pennsylvania USA
- Five Eleven Pharma Inc; Philadelphia Pennsylvania USA
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22
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Komorowski A, James GM, Philippe C, Gryglewski G, Bauer A, Hienert M, Spies M, Kautzky A, Vanicek T, Hahn A, Traub-Weidinger T, Winkler D, Wadsak W, Mitterhauser M, Hacker M, Kasper S, Lanzenberger R. Association of Protein Distribution and Gene Expression Revealed by PET and Post-Mortem Quantification in the Serotonergic System of the Human Brain. Cereb Cortex 2018; 27:117-130. [PMID: 27909009 PMCID: PMC5939202 DOI: 10.1093/cercor/bhw355] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Indexed: 12/12/2022] Open
Abstract
Regional differences in posttranscriptional mechanisms may influence in vivo protein densities. The association of positron emission tomography (PET) imaging data from 112 healthy controls and gene expression values from the Allen Human Brain Atlas, based on post-mortem brains, was investigated for key serotonergic proteins. PET binding values and gene expression intensities were correlated for the main inhibitory (5-HT1A) and excitatory (5-HT2A) serotonin receptor, the serotonin transporter (SERT) as well as monoamine oxidase-A (MAO-A), using Spearman's correlation coefficients (rs) in a voxel-wise and region-wise analysis. Correlations indicated a strong linear relationship between gene and protein expression for both the 5-HT1A (voxel-wise rs = 0.71; region-wise rs = 0.93) and the 5-HT2A receptor (rs = 0.66; 0.75), but only a weak association for MAO-A (rs = 0.26; 0.66) and no clear correlation for SERT (rs = 0.17; 0.29). Additionally, region-wise correlations were performed using mRNA expression from the HBT, yielding comparable results (5-HT1Ars = 0.82; 5-HT2Ars = 0.88; MAO-A rs = 0.50; SERT rs = -0.01). The SERT and MAO-A appear to be regulated in a region-specific manner across the whole brain. In contrast, the serotonin-1A and -2A receptors are presumably targeted by common posttranscriptional processes similar in all brain areas suggesting the applicability of mRNA expression as surrogate parameter for density of these proteins.
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Affiliation(s)
- A Komorowski
- Department of Psychiatry and Pychotherapy, Division of Biological Psychiatry, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
| | - G M James
- Department of Psychiatry and Pychotherapy, Division of Biological Psychiatry, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
| | - C Philippe
- Department of Biomedical Imaging and Image-guided Therapy, Division of Nuclear Medicine, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
| | - G Gryglewski
- Department of Psychiatry and Pychotherapy, Division of Biological Psychiatry, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
| | - A Bauer
- Institute of Neuroscience and Medicine (INM-2), Research Centre Jülich, 52425 Jülich, Germany
| | - M Hienert
- Department of Psychiatry and Pychotherapy, Division of Biological Psychiatry, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
| | - M Spies
- Department of Psychiatry and Pychotherapy, Division of Biological Psychiatry, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
| | - A Kautzky
- Department of Psychiatry and Pychotherapy, Division of Biological Psychiatry, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
| | - T Vanicek
- Department of Psychiatry and Pychotherapy, Division of Biological Psychiatry, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
| | - A Hahn
- Department of Psychiatry and Pychotherapy, Division of Biological Psychiatry, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
| | - T Traub-Weidinger
- Department of Biomedical Imaging and Image-guided Therapy, Division of Nuclear Medicine, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
| | - D Winkler
- Department of Psychiatry and Pychotherapy, Division of Biological Psychiatry, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
| | - W Wadsak
- Department of Biomedical Imaging and Image-guided Therapy, Division of Nuclear Medicine, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
| | - M Mitterhauser
- Department of Biomedical Imaging and Image-guided Therapy, Division of Nuclear Medicine, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
| | - M Hacker
- Department of Biomedical Imaging and Image-guided Therapy, Division of Nuclear Medicine, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
| | - S Kasper
- Department of Psychiatry and Pychotherapy, Division of Biological Psychiatry, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
| | - R Lanzenberger
- Department of Psychiatry and Pychotherapy, Division of Biological Psychiatry, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
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23
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Lee J, Kim BH, Kim E, Howes OD, Cho KIK, Yoon YB, Kwon JS. Higher serotonin transporter availability in early-onset obsessive-compulsive disorder patients undergoing escitalopram treatment: A [ 11 C]DASB PET study. Hum Psychopharmacol 2018; 33. [PMID: 29210107 DOI: 10.1002/hup.2642] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Revised: 10/25/2017] [Accepted: 11/02/2017] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Early-onset obsessive-compulsive disorder (EOCD) and late-onset obsessive-compulsive disorder (LOCD) are distinct subtypes of obsessive-compulsive disorder (OCD). OCD patients are treated with serotonin reuptake inhibitors, but the difference in serotonin transporter (SERT) availability between medicated EOCD and LOCD is unexplored yet. METHODS Six EOCD and 6 LOCD patients were enrolled. They underwent serial [11 C]DASB positron emission tomography scans during maintenance therapy with escitalopram, and their plasma concentration of escitalopram was measured simultaneously with the scan. Then, the drug-free binding potential of SERT was calculated by pharmacokinetic-pharmacodynamic modelling. RESULTS In comparison with LOCD patients, SERT availability was significantly higher in the putamen of EOCD patients (U = 4, p = .026), but not in the caudate nucleus (U = 14, p = .589), thalamus (U = 16, p = .818), and dorsal raphe nucleus (U = 7, p = .093). Binding potential of putamen showed a negative correlation (r = -.580, p = .048) with age of onset of the disease, but not with the Yale-Brown Obsessive Compulsive Scale scores. CONCLUSIONS These findings indicate that the earlier the age of onset of OCD, the less serotonergic pathology there is and that this difference remains even after long-term serotonin reuptake inhibitor treatment. Clinically, it might suggest that nonserotonergic treatments would be a better option for EOCD patients.
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Affiliation(s)
- Junhee Lee
- Department of Neuropsychiatry, Seoul National University Hospital, Seoul, Republic of Korea
| | - Bo-Hyung Kim
- Department of Clinical Pharmacology and Therapeutics, College of Medicine, Kyung Hee University Hospital, Seoul, Republic of Korea
| | - Euitae Kim
- Department of Psychiatry, College of Medicine, Seoul National University, Seoul, Republic of Korea.,Department of Neuropsychiatry, Seoul National University Bundang Hospital, Seongnam, Gyeonggi-do, Republic of Korea
| | - Oliver D Howes
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK.,MRC Clinical Sciences Centre, London, UK.,Institute of Clinical Sciences, Faculty of Medicine, Imperial College London, London, UK
| | - Kang Ik Kevin Cho
- Institute of Human Behavioral Medicine, SNU-MRC, Seoul, Republic of Korea
| | - Youngwoo Bryan Yoon
- Institute of Human Behavioral Medicine, SNU-MRC, Seoul, Republic of Korea.,Department of Brain and Cognitive Sciences, College of Natural Sciences, Seoul National University, Seoul, Republic of Korea
| | - Jun Soo Kwon
- Department of Neuropsychiatry, Seoul National University Hospital, Seoul, Republic of Korea.,Department of Psychiatry, College of Medicine, Seoul National University, Seoul, Republic of Korea.,Institute of Human Behavioral Medicine, SNU-MRC, Seoul, Republic of Korea.,Department of Brain and Cognitive Sciences, College of Natural Sciences, Seoul National University, Seoul, Republic of Korea
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24
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Pagano G, Niccolini F, Politis M. The serotonergic system in Parkinson's patients with dyskinesia: evidence from imaging studies. J Neural Transm (Vienna) 2017; 125:1217-1223. [PMID: 29264660 PMCID: PMC6060863 DOI: 10.1007/s00702-017-1823-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Accepted: 12/05/2017] [Indexed: 12/31/2022]
Abstract
The purpose of review is to review the current status of positron emission tomography (PET) molecular imaging of serotonergic system in Parkinson’s patients who experience levodopa-induced (LIDs) and graft-induced dyskinesias (GIDs). PET imaging studies have shown that Parkinson’s disease is characterized by progressive loss of dopaminergic and serotonergic neurons. Parkinson’s patients who experienced LIDs and GIDs have an aberrant spreading of serotonergic terminals, which lead to an increased serotonergic/dopaminergic terminals ratio within the putamen. Serotonergic terminals convert exogenous levodopa into dopamine in a non-physiological manner and release an abnormal amount of dopamine without an auto-regulatory feedback. This results in higher swings in synaptic levels of dopamine, which leads to the development of LIDs and GIDs. The modulation of serotonergic terminals with 5-HT1A and 5-HT1B receptors agonists partially reduced these motor complications. In vivo PET studies confirmed that abnormal spreading of serotonergic terminals within the putamen has a pivotal role in the development of LIDs and GIDs. However, glutamatergic, adenosinergic, opioid systems, and phosphodiesterases 10A may also play a role in the development of these motor complications. An integrative multimodal imaging approach combining PET and MRI imaging techniques is needed to fully understand the mechanisms underlying the development of LIDs and GIDs.
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Affiliation(s)
- Gennaro Pagano
- Neurodegeneration Imaging Group, Maurice Wohl Clinical Neuroscience Institute, Institute of Psychiatry, Psychology and Neuroscience (IoPPN), King's College London, 125 Coldharbour Lane, Camberwell, London, SE5 9NU, UK
| | - Flavia Niccolini
- Neurodegeneration Imaging Group, Maurice Wohl Clinical Neuroscience Institute, Institute of Psychiatry, Psychology and Neuroscience (IoPPN), King's College London, 125 Coldharbour Lane, Camberwell, London, SE5 9NU, UK
| | - Marios Politis
- Neurodegeneration Imaging Group, Maurice Wohl Clinical Neuroscience Institute, Institute of Psychiatry, Psychology and Neuroscience (IoPPN), King's College London, 125 Coldharbour Lane, Camberwell, London, SE5 9NU, UK.
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25
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Regional Differences in Serotonin Transporter Occupancy by Escitalopram: An [ 11C]DASB PK-PD Study. Clin Pharmacokinet 2017; 56:371-381. [PMID: 27557550 DOI: 10.1007/s40262-016-0444-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
BACKGROUND AND OBJECTIVE Escitalopram is one of the most commonly prescribed selective serotonin reuptake inhibitors (SSRIs). It is thought to act by blocking the serotonin transporter (SERT). However, its dose-SERT occupancy relationship is not well known, so it is not clear what level of SERT blockade is achieved by currently approved doses. METHODS To determine the dose-occupancy relationship, we measured serial SERT occupancy using [11C]DASB [3-amino-4-(2-dimethylaminomethylphenylsulfanyl)-benzonitrile] positron emission tomography (PET) and plasma drug concentrations after the administration of escitalopram in 12 healthy volunteers. We then built a pharmacokinetic-pharmacodynamic model to characterize the dose-occupancy relationship in the putamen and the dorsal raphe nucleus. RESULTS Escitalopram at approved doses occupied less SERT than expected and the SERT occupancy showed regional effects [occupancy was higher in the dorsal raphe nucleus than in the putamen (p < 0.001)]. The drug concentration when 50 % of receptors are occupied (EC50) value and Hill coefficient were significantly different between the putamen (EC50 4.30, Hill coefficient 0.459) and the dorsal raphe nucleus (EC50 2.89, Hill coefficient 0.817). CONCLUSIONS Higher doses of escitalopram than 20 mg are needed to achieve 80 % or greater SERT occupancy. Higher occupancy by escitalopram in the dorsal raphe nucleus relative to the striatum may explain the delayed onset of action of SSRIs by modulating autoreceptor function. The prevention of the 5-HT1A autoreceptor-mediated negative feedback could be a strategy for accelerating the clinical antidepressant effects.
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26
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Abstract
Purpose of Review To review the current status of positron emission tomography (PET) molecular imaging research of levodopa-induced dyskinesias (LIDs) in Parkinson’s disease (PD). Recent Findings Recent PET studies have provided robust evidence that LIDs in PD are associated with elevated and fluctuating striatal dopamine synaptic levels, which is a consequence of the imbalance between dopaminergic and serotonergic terminals, with the latter playing a key role in mishandling presynaptic dopamine release. Long-term exposure to levodopa is no longer believed to solely induce LIDs, as studies have highlighted that PD patients who go on to develop LIDs exhibit elevated putaminal dopamine release before the initiation of levodopa treatment, suggesting the involvement of other mechanisms, including altered neuronal firing and abnormal levels of phosphodiesterase 10A. Summary Dopaminergic, serotonergic, glutamatergic, adenosinergic and opioid systems and phosphodiesterase 10A levels have been shown to be implicated in the development of LIDs in PD. However, no system may be considered sufficient on its own for the development of LIDs, and the mechanisms underlying LIDs in PD may have a multisystem origin. In line with this notion, future studies should use multimodal PET molecular imaging in the same individuals to shed further light on the different mechanisms underlying the development of LIDs in PD.
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27
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Fukai M, Hirosawa T, Kikuchi M, Ouchi Y, Takahashi T, Yoshimura Y, Miyagishi Y, Kosaka H, Yokokura M, Yoshikawa E, Bunai T, Minabe Y. Oxytocin effects on emotional response to others' faces via serotonin system in autism: A pilot study. Psychiatry Res Neuroimaging 2017; 267:45-50. [PMID: 28738293 DOI: 10.1016/j.pscychresns.2017.06.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 06/27/2017] [Accepted: 06/27/2017] [Indexed: 11/29/2022]
Abstract
The oxytocin (OT)-related serotonergic system is thought to play an important role in the etiology and social symptoms of autism spectrum disorder (ASD). However, no evidence exists for the relation between the prosocial effect of chronic OT administration and the brain serotonergic system. Ten male subjects with ASD were administered OT for 8-10 weeks in an open-label, single-arm, non-randomized, uncontrolled manner. Before and during the OT treatment, positron emission tomography was used with the (11C)-3-amino-4-(2-[(demethylamino)methyl]phenylthio)benzonitrile(11C-DASB) radiotracer. Then binding of serotonin transporter (11C-DASB BPND) was estimated. The main outcome measures were changes in 11C-DASB BPND and changes in the emotional response to others' faces. No significant change was found in the emotional response to others' faces after the 8-10 week OT treatment. However, the increased serotonin transporter (SERT) level in the striatum after treatment was correlated significantly with increased negative emotional response to human faces. This study revealed a relation between changes in the serotonergic system and in prosociality after chronic OT administration. Additional studies must be conducted to verify the chronic OT effects on social behavior via the serotonergic system.
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Affiliation(s)
- Mina Fukai
- Department of Psychiatry and Neurobiology, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
| | - Tetsu Hirosawa
- Department of Psychiatry and Neurobiology, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan.
| | - Mitsuru Kikuchi
- Department of Psychiatry and Neurobiology, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan; Research Center for Child Mental Development, Kanazawa University, Kanazawa, Japan
| | - Yasuomi Ouchi
- Department of Biofunctional Imaging, Medical Photonics Research Center, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Tetsuya Takahashi
- Research Center for Child Mental Development, Kanazawa University, Kanazawa, Japan
| | - Yuko Yoshimura
- Research Center for Child Mental Development, Kanazawa University, Kanazawa, Japan
| | - Yoshiaki Miyagishi
- Department of Psychiatry and Neurobiology, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
| | - Hirotaka Kosaka
- Research Center for Child Mental Development, University of Fukui, Japan
| | - Masamichi Yokokura
- Department of Psychiatry and Neurology, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Etsuji Yoshikawa
- Central Research Laboratory, Hamamatsu Photonics KK, Hamamatsu, Japan
| | - Tomoyasu Bunai
- Department of Biofunctional Imaging, Medical Photonics Research Center, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Yoshio Minabe
- Department of Psychiatry and Neurobiology, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan; Research Center for Child Mental Development, Kanazawa University, Kanazawa, Japan
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28
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Ganz M, Feng L, Hansen HD, Beliveau V, Svarer C, Knudsen GM, Greve DN. Cerebellar heterogeneity and its impact on PET data quantification of 5-HT receptor radioligands. J Cereb Blood Flow Metab 2017; 37:3243-3252. [PMID: 28075185 PMCID: PMC5584698 DOI: 10.1177/0271678x16686092] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 11/18/2016] [Accepted: 11/22/2016] [Indexed: 11/15/2022]
Abstract
In the quantification of positron emission tomography (PET) radiotracer binding, a commonly used method is reference tissue modeling (RTM). RTM necessitates a proper reference and a ubiquitous choice for G-protein coupled receptors is the cerebellum. We investigated regional differences in uptake within the grey matter of the cerebellar hemispheres (CH), the cerebellar white matter (CW), and the cerebellar vermis (CV) for five PET radioligands targeting the serotonin system. Furthermore, we evaluated the impact of choosing different reference regions when quantifying neocortical binding. The PET and MR images are part of the Cimbi database: 5-HT1AR ([11C]CUMI-101, n = 8), 5-HT1BR ([11C]AZ10419369, n = 36), 5-HT2AR ([11C]Cimbi-36, n = 29), 5-HT4R ([11C]SB207145, n = 59), and 5-HTT ([11C]DASB, n = 100). We employed SUIT and FreeSurfer to delineate CV, CW, and CH and quantified mean standardized uptake values (SUV) and nondisplaceable neocortical binding potential (BPND). Statistical difference was assessed with paired nonparametric two-sided Wilcoxon signed-rank tests and multiple comparison corrected via false discovery rate. We demonstrate significant radioligand specific regional differences in cerebellar uptake. These differences persist when using different cerebellar regions for RTM, but the influence on the neocortical BPND is small. Nevertheless, our data highlight the importance of validating each radioligand carefully for defining the optimal reference region.
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Affiliation(s)
- Melanie Ganz
- Neurobiology Research Unit and Center for Integrated Molecular Brain Imaging, Rigshospitalet, Copenhagen, Denmark
| | - Ling Feng
- Neurobiology Research Unit and Center for Integrated Molecular Brain Imaging, Rigshospitalet, Copenhagen, Denmark
| | - Hanne Demant Hansen
- Neurobiology Research Unit and Center for Integrated Molecular Brain Imaging, Rigshospitalet, Copenhagen, Denmark
| | - Vincent Beliveau
- Neurobiology Research Unit and Center for Integrated Molecular Brain Imaging, Rigshospitalet, Copenhagen, Denmark
- Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Claus Svarer
- Neurobiology Research Unit and Center for Integrated Molecular Brain Imaging, Rigshospitalet, Copenhagen, Denmark
| | - Gitte M Knudsen
- Neurobiology Research Unit and Center for Integrated Molecular Brain Imaging, Rigshospitalet, Copenhagen, Denmark
- Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Douglas N Greve
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA
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29
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Tuominen L, Miettunen J, Cannon DM, Drevets WC, Frokjaer VG, Hirvonen J, Ichise M, Jensen PS, Keltikangas-Järvinen L, Klaver JM, Knudsen GM, Takano A, Suhara T, Hietala J. Neuroticism Associates with Cerebral in Vivo Serotonin Transporter Binding Differently in Males and Females. Int J Neuropsychopharmacol 2017; 20:963-970. [PMID: 29020405 PMCID: PMC5716061 DOI: 10.1093/ijnp/pyx071] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Accepted: 08/03/2017] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Neuroticism is a major risk factor for affective disorders. This personality trait has been hypothesized to associate with synaptic availability of the serotonin transporter, which critically controls serotonergic tone in the brain. However, earlier studies linking neuroticism and serotonin transporter have failed to produce converging findings. Because sex affects both the serotonergic system and the risk that neuroticism poses to the individual, sex may modify the association between neuroticism and serotonin transporter, but this question has not been investigated by previous studies. METHODS Here, we combined data from 4 different positron emission tomography imaging centers to address whether neuroticism is related to serotonin transporter binding in vivo. The data set included serotonin transporter binding potential values from the thalamus and striatum and personality scores from 91 healthy males and 56 healthy females. We specifically tested if the association between neuroticism and serotonin transporter is different in females and males. RESULTS We found that neuroticism and thalamic serotonin transporter binding potentials were associated in both males and females, but with opposite directionality. Higher neuroticism associated with higher serotonin transporter binding potential in males (standardized beta 0.292, P=.008), whereas in females, higher neuroticism associated with lower serotonin transporter binding potential (standardized beta -0.288, P=.014). CONCLUSIONS The finding is in agreement with recent studies showing that the serotonergic system is involved in affective disorders differently in males and females and suggests that contribution of thalamic serotonin transporter to the risk of affective disorders depends on sex.
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Affiliation(s)
- Lauri Tuominen
- Turku PET Centre, Turku University Hospital, Turku, Finland (Drs Tuominen, Hirvonen, and Hietala); Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Cambridge, MA (Dr Tuominen); Center for Life Course Health Research, University of Oulu, Finland & Medical Research Center (MRC) Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland (Dr Miettunen); Centre for Neuroimaging & Cognitive Genomics (NICOG), Clinical Neuroimaging Laboratory, NCBES Galway Neuroscience Centre, College of Medicine Nursing and Health Sciences, National University of Ireland, Galway, Ireland (Dr Cannon); Janssen Research & Development, LLC, of Johnson & Johnson, Titusville, NJ (Dr Drevets); Neurobiology Research Unit, Rigshospitalet, Denmark (Dr Knudsen); Center for Integrated Molecular Brain Imaging, Rigshospitalet, Denmark (Dr Frokjaer and Mr Jensen); Department of Radiology, University of Turku, Turku, Finland (Dr Hirvonen); Department of Functional Brain Imaging Research, National Institute of Radiological Sciences, National Institute for Quantum and Radiological Science and Technology, Chiba, Japan (Drs Ichise, Takano, and Suhara); IBS, Unit of Personality, Work and Health Psychology, University of Helsinki, Helsinki, Finland (Dr Keltikangas-Järvinen); Department of Psychology, Southern Illinois University, Carbondale, Illinois (Dr Klaver); Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark (Dr Knudsen); Center for Psychiatric Research, Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden (Dr Takano); Department of Psychiatry, University of Turku, Turku, Finland (Dr Hietala),Correspondence: Lauri Tuominen, MD, PhD, MGH/HST Athinoula A. Martinos Center for Biomedical Imaging, 149 13th St, Charlestown, MA 02129 ()
| | - Jouko Miettunen
- Turku PET Centre, Turku University Hospital, Turku, Finland (Drs Tuominen, Hirvonen, and Hietala); Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Cambridge, MA (Dr Tuominen); Center for Life Course Health Research, University of Oulu, Finland & Medical Research Center (MRC) Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland (Dr Miettunen); Centre for Neuroimaging & Cognitive Genomics (NICOG), Clinical Neuroimaging Laboratory, NCBES Galway Neuroscience Centre, College of Medicine Nursing and Health Sciences, National University of Ireland, Galway, Ireland (Dr Cannon); Janssen Research & Development, LLC, of Johnson & Johnson, Titusville, NJ (Dr Drevets); Neurobiology Research Unit, Rigshospitalet, Denmark (Dr Knudsen); Center for Integrated Molecular Brain Imaging, Rigshospitalet, Denmark (Dr Frokjaer and Mr Jensen); Department of Radiology, University of Turku, Turku, Finland (Dr Hirvonen); Department of Functional Brain Imaging Research, National Institute of Radiological Sciences, National Institute for Quantum and Radiological Science and Technology, Chiba, Japan (Drs Ichise, Takano, and Suhara); IBS, Unit of Personality, Work and Health Psychology, University of Helsinki, Helsinki, Finland (Dr Keltikangas-Järvinen); Department of Psychology, Southern Illinois University, Carbondale, Illinois (Dr Klaver); Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark (Dr Knudsen); Center for Psychiatric Research, Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden (Dr Takano); Department of Psychiatry, University of Turku, Turku, Finland (Dr Hietala)
| | - Dara M Cannon
- Turku PET Centre, Turku University Hospital, Turku, Finland (Drs Tuominen, Hirvonen, and Hietala); Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Cambridge, MA (Dr Tuominen); Center for Life Course Health Research, University of Oulu, Finland & Medical Research Center (MRC) Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland (Dr Miettunen); Centre for Neuroimaging & Cognitive Genomics (NICOG), Clinical Neuroimaging Laboratory, NCBES Galway Neuroscience Centre, College of Medicine Nursing and Health Sciences, National University of Ireland, Galway, Ireland (Dr Cannon); Janssen Research & Development, LLC, of Johnson & Johnson, Titusville, NJ (Dr Drevets); Neurobiology Research Unit, Rigshospitalet, Denmark (Dr Knudsen); Center for Integrated Molecular Brain Imaging, Rigshospitalet, Denmark (Dr Frokjaer and Mr Jensen); Department of Radiology, University of Turku, Turku, Finland (Dr Hirvonen); Department of Functional Brain Imaging Research, National Institute of Radiological Sciences, National Institute for Quantum and Radiological Science and Technology, Chiba, Japan (Drs Ichise, Takano, and Suhara); IBS, Unit of Personality, Work and Health Psychology, University of Helsinki, Helsinki, Finland (Dr Keltikangas-Järvinen); Department of Psychology, Southern Illinois University, Carbondale, Illinois (Dr Klaver); Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark (Dr Knudsen); Center for Psychiatric Research, Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden (Dr Takano); Department of Psychiatry, University of Turku, Turku, Finland (Dr Hietala)
| | - Wayne C Drevets
- Turku PET Centre, Turku University Hospital, Turku, Finland (Drs Tuominen, Hirvonen, and Hietala); Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Cambridge, MA (Dr Tuominen); Center for Life Course Health Research, University of Oulu, Finland & Medical Research Center (MRC) Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland (Dr Miettunen); Centre for Neuroimaging & Cognitive Genomics (NICOG), Clinical Neuroimaging Laboratory, NCBES Galway Neuroscience Centre, College of Medicine Nursing and Health Sciences, National University of Ireland, Galway, Ireland (Dr Cannon); Janssen Research & Development, LLC, of Johnson & Johnson, Titusville, NJ (Dr Drevets); Neurobiology Research Unit, Rigshospitalet, Denmark (Dr Knudsen); Center for Integrated Molecular Brain Imaging, Rigshospitalet, Denmark (Dr Frokjaer and Mr Jensen); Department of Radiology, University of Turku, Turku, Finland (Dr Hirvonen); Department of Functional Brain Imaging Research, National Institute of Radiological Sciences, National Institute for Quantum and Radiological Science and Technology, Chiba, Japan (Drs Ichise, Takano, and Suhara); IBS, Unit of Personality, Work and Health Psychology, University of Helsinki, Helsinki, Finland (Dr Keltikangas-Järvinen); Department of Psychology, Southern Illinois University, Carbondale, Illinois (Dr Klaver); Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark (Dr Knudsen); Center for Psychiatric Research, Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden (Dr Takano); Department of Psychiatry, University of Turku, Turku, Finland (Dr Hietala)
| | - Vibe G Frokjaer
- Turku PET Centre, Turku University Hospital, Turku, Finland (Drs Tuominen, Hirvonen, and Hietala); Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Cambridge, MA (Dr Tuominen); Center for Life Course Health Research, University of Oulu, Finland & Medical Research Center (MRC) Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland (Dr Miettunen); Centre for Neuroimaging & Cognitive Genomics (NICOG), Clinical Neuroimaging Laboratory, NCBES Galway Neuroscience Centre, College of Medicine Nursing and Health Sciences, National University of Ireland, Galway, Ireland (Dr Cannon); Janssen Research & Development, LLC, of Johnson & Johnson, Titusville, NJ (Dr Drevets); Neurobiology Research Unit, Rigshospitalet, Denmark (Dr Knudsen); Center for Integrated Molecular Brain Imaging, Rigshospitalet, Denmark (Dr Frokjaer and Mr Jensen); Department of Radiology, University of Turku, Turku, Finland (Dr Hirvonen); Department of Functional Brain Imaging Research, National Institute of Radiological Sciences, National Institute for Quantum and Radiological Science and Technology, Chiba, Japan (Drs Ichise, Takano, and Suhara); IBS, Unit of Personality, Work and Health Psychology, University of Helsinki, Helsinki, Finland (Dr Keltikangas-Järvinen); Department of Psychology, Southern Illinois University, Carbondale, Illinois (Dr Klaver); Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark (Dr Knudsen); Center for Psychiatric Research, Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden (Dr Takano); Department of Psychiatry, University of Turku, Turku, Finland (Dr Hietala)
| | - Jussi Hirvonen
- Turku PET Centre, Turku University Hospital, Turku, Finland (Drs Tuominen, Hirvonen, and Hietala); Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Cambridge, MA (Dr Tuominen); Center for Life Course Health Research, University of Oulu, Finland & Medical Research Center (MRC) Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland (Dr Miettunen); Centre for Neuroimaging & Cognitive Genomics (NICOG), Clinical Neuroimaging Laboratory, NCBES Galway Neuroscience Centre, College of Medicine Nursing and Health Sciences, National University of Ireland, Galway, Ireland (Dr Cannon); Janssen Research & Development, LLC, of Johnson & Johnson, Titusville, NJ (Dr Drevets); Neurobiology Research Unit, Rigshospitalet, Denmark (Dr Knudsen); Center for Integrated Molecular Brain Imaging, Rigshospitalet, Denmark (Dr Frokjaer and Mr Jensen); Department of Radiology, University of Turku, Turku, Finland (Dr Hirvonen); Department of Functional Brain Imaging Research, National Institute of Radiological Sciences, National Institute for Quantum and Radiological Science and Technology, Chiba, Japan (Drs Ichise, Takano, and Suhara); IBS, Unit of Personality, Work and Health Psychology, University of Helsinki, Helsinki, Finland (Dr Keltikangas-Järvinen); Department of Psychology, Southern Illinois University, Carbondale, Illinois (Dr Klaver); Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark (Dr Knudsen); Center for Psychiatric Research, Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden (Dr Takano); Department of Psychiatry, University of Turku, Turku, Finland (Dr Hietala)
| | - Masanori Ichise
- Turku PET Centre, Turku University Hospital, Turku, Finland (Drs Tuominen, Hirvonen, and Hietala); Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Cambridge, MA (Dr Tuominen); Center for Life Course Health Research, University of Oulu, Finland & Medical Research Center (MRC) Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland (Dr Miettunen); Centre for Neuroimaging & Cognitive Genomics (NICOG), Clinical Neuroimaging Laboratory, NCBES Galway Neuroscience Centre, College of Medicine Nursing and Health Sciences, National University of Ireland, Galway, Ireland (Dr Cannon); Janssen Research & Development, LLC, of Johnson & Johnson, Titusville, NJ (Dr Drevets); Neurobiology Research Unit, Rigshospitalet, Denmark (Dr Knudsen); Center for Integrated Molecular Brain Imaging, Rigshospitalet, Denmark (Dr Frokjaer and Mr Jensen); Department of Radiology, University of Turku, Turku, Finland (Dr Hirvonen); Department of Functional Brain Imaging Research, National Institute of Radiological Sciences, National Institute for Quantum and Radiological Science and Technology, Chiba, Japan (Drs Ichise, Takano, and Suhara); IBS, Unit of Personality, Work and Health Psychology, University of Helsinki, Helsinki, Finland (Dr Keltikangas-Järvinen); Department of Psychology, Southern Illinois University, Carbondale, Illinois (Dr Klaver); Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark (Dr Knudsen); Center for Psychiatric Research, Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden (Dr Takano); Department of Psychiatry, University of Turku, Turku, Finland (Dr Hietala)
| | - Peter S Jensen
- Turku PET Centre, Turku University Hospital, Turku, Finland (Drs Tuominen, Hirvonen, and Hietala); Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Cambridge, MA (Dr Tuominen); Center for Life Course Health Research, University of Oulu, Finland & Medical Research Center (MRC) Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland (Dr Miettunen); Centre for Neuroimaging & Cognitive Genomics (NICOG), Clinical Neuroimaging Laboratory, NCBES Galway Neuroscience Centre, College of Medicine Nursing and Health Sciences, National University of Ireland, Galway, Ireland (Dr Cannon); Janssen Research & Development, LLC, of Johnson & Johnson, Titusville, NJ (Dr Drevets); Neurobiology Research Unit, Rigshospitalet, Denmark (Dr Knudsen); Center for Integrated Molecular Brain Imaging, Rigshospitalet, Denmark (Dr Frokjaer and Mr Jensen); Department of Radiology, University of Turku, Turku, Finland (Dr Hirvonen); Department of Functional Brain Imaging Research, National Institute of Radiological Sciences, National Institute for Quantum and Radiological Science and Technology, Chiba, Japan (Drs Ichise, Takano, and Suhara); IBS, Unit of Personality, Work and Health Psychology, University of Helsinki, Helsinki, Finland (Dr Keltikangas-Järvinen); Department of Psychology, Southern Illinois University, Carbondale, Illinois (Dr Klaver); Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark (Dr Knudsen); Center for Psychiatric Research, Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden (Dr Takano); Department of Psychiatry, University of Turku, Turku, Finland (Dr Hietala)
| | - Liisa Keltikangas-Järvinen
- Turku PET Centre, Turku University Hospital, Turku, Finland (Drs Tuominen, Hirvonen, and Hietala); Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Cambridge, MA (Dr Tuominen); Center for Life Course Health Research, University of Oulu, Finland & Medical Research Center (MRC) Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland (Dr Miettunen); Centre for Neuroimaging & Cognitive Genomics (NICOG), Clinical Neuroimaging Laboratory, NCBES Galway Neuroscience Centre, College of Medicine Nursing and Health Sciences, National University of Ireland, Galway, Ireland (Dr Cannon); Janssen Research & Development, LLC, of Johnson & Johnson, Titusville, NJ (Dr Drevets); Neurobiology Research Unit, Rigshospitalet, Denmark (Dr Knudsen); Center for Integrated Molecular Brain Imaging, Rigshospitalet, Denmark (Dr Frokjaer and Mr Jensen); Department of Radiology, University of Turku, Turku, Finland (Dr Hirvonen); Department of Functional Brain Imaging Research, National Institute of Radiological Sciences, National Institute for Quantum and Radiological Science and Technology, Chiba, Japan (Drs Ichise, Takano, and Suhara); IBS, Unit of Personality, Work and Health Psychology, University of Helsinki, Helsinki, Finland (Dr Keltikangas-Järvinen); Department of Psychology, Southern Illinois University, Carbondale, Illinois (Dr Klaver); Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark (Dr Knudsen); Center for Psychiatric Research, Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden (Dr Takano); Department of Psychiatry, University of Turku, Turku, Finland (Dr Hietala)
| | - Jacqueline M Klaver
- Turku PET Centre, Turku University Hospital, Turku, Finland (Drs Tuominen, Hirvonen, and Hietala); Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Cambridge, MA (Dr Tuominen); Center for Life Course Health Research, University of Oulu, Finland & Medical Research Center (MRC) Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland (Dr Miettunen); Centre for Neuroimaging & Cognitive Genomics (NICOG), Clinical Neuroimaging Laboratory, NCBES Galway Neuroscience Centre, College of Medicine Nursing and Health Sciences, National University of Ireland, Galway, Ireland (Dr Cannon); Janssen Research & Development, LLC, of Johnson & Johnson, Titusville, NJ (Dr Drevets); Neurobiology Research Unit, Rigshospitalet, Denmark (Dr Knudsen); Center for Integrated Molecular Brain Imaging, Rigshospitalet, Denmark (Dr Frokjaer and Mr Jensen); Department of Radiology, University of Turku, Turku, Finland (Dr Hirvonen); Department of Functional Brain Imaging Research, National Institute of Radiological Sciences, National Institute for Quantum and Radiological Science and Technology, Chiba, Japan (Drs Ichise, Takano, and Suhara); IBS, Unit of Personality, Work and Health Psychology, University of Helsinki, Helsinki, Finland (Dr Keltikangas-Järvinen); Department of Psychology, Southern Illinois University, Carbondale, Illinois (Dr Klaver); Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark (Dr Knudsen); Center for Psychiatric Research, Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden (Dr Takano); Department of Psychiatry, University of Turku, Turku, Finland (Dr Hietala)
| | - Gitte M Knudsen
- Turku PET Centre, Turku University Hospital, Turku, Finland (Drs Tuominen, Hirvonen, and Hietala); Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Cambridge, MA (Dr Tuominen); Center for Life Course Health Research, University of Oulu, Finland & Medical Research Center (MRC) Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland (Dr Miettunen); Centre for Neuroimaging & Cognitive Genomics (NICOG), Clinical Neuroimaging Laboratory, NCBES Galway Neuroscience Centre, College of Medicine Nursing and Health Sciences, National University of Ireland, Galway, Ireland (Dr Cannon); Janssen Research & Development, LLC, of Johnson & Johnson, Titusville, NJ (Dr Drevets); Neurobiology Research Unit, Rigshospitalet, Denmark (Dr Knudsen); Center for Integrated Molecular Brain Imaging, Rigshospitalet, Denmark (Dr Frokjaer and Mr Jensen); Department of Radiology, University of Turku, Turku, Finland (Dr Hirvonen); Department of Functional Brain Imaging Research, National Institute of Radiological Sciences, National Institute for Quantum and Radiological Science and Technology, Chiba, Japan (Drs Ichise, Takano, and Suhara); IBS, Unit of Personality, Work and Health Psychology, University of Helsinki, Helsinki, Finland (Dr Keltikangas-Järvinen); Department of Psychology, Southern Illinois University, Carbondale, Illinois (Dr Klaver); Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark (Dr Knudsen); Center for Psychiatric Research, Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden (Dr Takano); Department of Psychiatry, University of Turku, Turku, Finland (Dr Hietala)
| | - Akihiro Takano
- Turku PET Centre, Turku University Hospital, Turku, Finland (Drs Tuominen, Hirvonen, and Hietala); Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Cambridge, MA (Dr Tuominen); Center for Life Course Health Research, University of Oulu, Finland & Medical Research Center (MRC) Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland (Dr Miettunen); Centre for Neuroimaging & Cognitive Genomics (NICOG), Clinical Neuroimaging Laboratory, NCBES Galway Neuroscience Centre, College of Medicine Nursing and Health Sciences, National University of Ireland, Galway, Ireland (Dr Cannon); Janssen Research & Development, LLC, of Johnson & Johnson, Titusville, NJ (Dr Drevets); Neurobiology Research Unit, Rigshospitalet, Denmark (Dr Knudsen); Center for Integrated Molecular Brain Imaging, Rigshospitalet, Denmark (Dr Frokjaer and Mr Jensen); Department of Radiology, University of Turku, Turku, Finland (Dr Hirvonen); Department of Functional Brain Imaging Research, National Institute of Radiological Sciences, National Institute for Quantum and Radiological Science and Technology, Chiba, Japan (Drs Ichise, Takano, and Suhara); IBS, Unit of Personality, Work and Health Psychology, University of Helsinki, Helsinki, Finland (Dr Keltikangas-Järvinen); Department of Psychology, Southern Illinois University, Carbondale, Illinois (Dr Klaver); Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark (Dr Knudsen); Center for Psychiatric Research, Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden (Dr Takano); Department of Psychiatry, University of Turku, Turku, Finland (Dr Hietala)
| | - Tetsuya Suhara
- Turku PET Centre, Turku University Hospital, Turku, Finland (Drs Tuominen, Hirvonen, and Hietala); Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Cambridge, MA (Dr Tuominen); Center for Life Course Health Research, University of Oulu, Finland & Medical Research Center (MRC) Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland (Dr Miettunen); Centre for Neuroimaging & Cognitive Genomics (NICOG), Clinical Neuroimaging Laboratory, NCBES Galway Neuroscience Centre, College of Medicine Nursing and Health Sciences, National University of Ireland, Galway, Ireland (Dr Cannon); Janssen Research & Development, LLC, of Johnson & Johnson, Titusville, NJ (Dr Drevets); Neurobiology Research Unit, Rigshospitalet, Denmark (Dr Knudsen); Center for Integrated Molecular Brain Imaging, Rigshospitalet, Denmark (Dr Frokjaer and Mr Jensen); Department of Radiology, University of Turku, Turku, Finland (Dr Hirvonen); Department of Functional Brain Imaging Research, National Institute of Radiological Sciences, National Institute for Quantum and Radiological Science and Technology, Chiba, Japan (Drs Ichise, Takano, and Suhara); IBS, Unit of Personality, Work and Health Psychology, University of Helsinki, Helsinki, Finland (Dr Keltikangas-Järvinen); Department of Psychology, Southern Illinois University, Carbondale, Illinois (Dr Klaver); Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark (Dr Knudsen); Center for Psychiatric Research, Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden (Dr Takano); Department of Psychiatry, University of Turku, Turku, Finland (Dr Hietala)
| | - Jarmo Hietala
- Turku PET Centre, Turku University Hospital, Turku, Finland (Drs Tuominen, Hirvonen, and Hietala); Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Cambridge, MA (Dr Tuominen); Center for Life Course Health Research, University of Oulu, Finland & Medical Research Center (MRC) Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland (Dr Miettunen); Centre for Neuroimaging & Cognitive Genomics (NICOG), Clinical Neuroimaging Laboratory, NCBES Galway Neuroscience Centre, College of Medicine Nursing and Health Sciences, National University of Ireland, Galway, Ireland (Dr Cannon); Janssen Research & Development, LLC, of Johnson & Johnson, Titusville, NJ (Dr Drevets); Neurobiology Research Unit, Rigshospitalet, Denmark (Dr Knudsen); Center for Integrated Molecular Brain Imaging, Rigshospitalet, Denmark (Dr Frokjaer and Mr Jensen); Department of Radiology, University of Turku, Turku, Finland (Dr Hirvonen); Department of Functional Brain Imaging Research, National Institute of Radiological Sciences, National Institute for Quantum and Radiological Science and Technology, Chiba, Japan (Drs Ichise, Takano, and Suhara); IBS, Unit of Personality, Work and Health Psychology, University of Helsinki, Helsinki, Finland (Dr Keltikangas-Järvinen); Department of Psychology, Southern Illinois University, Carbondale, Illinois (Dr Klaver); Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark (Dr Knudsen); Center for Psychiatric Research, Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden (Dr Takano); Department of Psychiatry, University of Turku, Turku, Finland (Dr Hietala)
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Core, social and moral disgust are bounded: A review on behavioral and neural bases of repugnance in clinical disorders. Neurosci Biobehav Rev 2017; 80:185-200. [PMID: 28506923 DOI: 10.1016/j.neubiorev.2017.05.008] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 04/19/2017] [Accepted: 05/09/2017] [Indexed: 12/12/2022]
Abstract
Disgust is a multifaceted experience that might affect several aspects of life. Here, we reviewed research on neurological and psychiatric disorders that are characterized by abnormal disgust processing to test the hypothesis of a shared neurocognitive architecture in the representation of three disgust domains: i) personal experience of 'core disgust'; ii) social disgust, i.e., sensitivity to others' expressions of disgust; iii) moral disgust, i.e., sensitivity to ethical violations. Our review provides some support to the shared neurocognitive hypothesis and suggests that the insula might be the "hub" structure linking the three domains of disgust sensitivity, while other brain regions may subserve specific facets of the multidimensional experience. Our review also suggests a role of serotonin core and moral disgust, supporting "neo-sentimentalist" theories of morality, which posit a causal role of affect in moral judgment.
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Hirosawa T, Kikuchi M, Ouchi Y, Takahashi T, Yoshimura Y, Kosaka H, Furutani N, Hiraishi H, Fukai M, Yokokura M, Yoshikawa E, Bunai T, Minabe Y. A pilot study of serotonergic modulation after long‐term administration of oxytocin in autism spectrum disorder. Autism Res 2017; 10:821-828. [DOI: 10.1002/aur.1761] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Revised: 01/12/2017] [Accepted: 01/13/2017] [Indexed: 12/21/2022]
Affiliation(s)
- Tetsu Hirosawa
- Department of Psychiatry and NeurobiologyGraduate School of Medical Science, Kanazawa UniversityKanazawa Japan
| | - Mitsuru Kikuchi
- Department of Psychiatry and NeurobiologyGraduate School of Medical Science, Kanazawa UniversityKanazawa Japan
- Research Center for Child Mental DevelopmentKanazawa UniversityKanazawa Japan
| | - Yasuomi Ouchi
- Department of Biofunctional ImagingMedical Photonics Research Center, Hamamatsu University School of MedicineHamamatsu Japan
| | - Tetsuya Takahashi
- Research Center for Child Mental DevelopmentKanazawa UniversityKanazawa Japan
| | - Yuko Yoshimura
- Research Center for Child Mental DevelopmentKanazawa UniversityKanazawa Japan
| | - Hirotaka Kosaka
- Research Center for Child Mental Development, University of Fukui Japan
| | - Naoki Furutani
- Department of Psychiatry and NeurobiologyGraduate School of Medical Science, Kanazawa UniversityKanazawa Japan
| | - Hirotoshi Hiraishi
- Research Center for Child Mental DevelopmentKanazawa UniversityKanazawa Japan
| | - Mina Fukai
- Department of Psychiatry and NeurobiologyGraduate School of Medical Science, Kanazawa UniversityKanazawa Japan
| | - Masamichi Yokokura
- Department of Psychiatry and NeurologyHamamatsu University School of MedicineHamamatsu Japan
| | - Etsuji Yoshikawa
- Central Research LaboratoryHamamatsu Photonics KKHamamatsu Japan
| | - Tomoyasu Bunai
- Department of Biofunctional ImagingMedical Photonics Research Center, Hamamatsu University School of MedicineHamamatsu Japan
| | - Yoshio Minabe
- Department of Psychiatry and NeurobiologyGraduate School of Medical Science, Kanazawa UniversityKanazawa Japan
- Research Center for Child Mental DevelopmentKanazawa UniversityKanazawa Japan
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32
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Liu Z, Wu Y, Liu T, Li R, Xie M. Serotonin regulation in a rat model of exercise-induced chronic fatigue. Neuroscience 2017; 349:27-34. [PMID: 28257895 DOI: 10.1016/j.neuroscience.2017.02.037] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Revised: 02/17/2017] [Accepted: 02/17/2017] [Indexed: 11/28/2022]
Abstract
This study investigated the mechanisms underlying regulation of the serotonin system in the rat brain during exercise-induced chronic fatigue. High-performance liquid chromatography-mass spectrometry (HPLC-MS) was performed to measure serum tryptophan of the fatigued rat. HPLC was conducted to measure 5-hydroxytryptamine (5-HT) and 5-hydroxyindoleacetic acid (5-HIAA) in the frontal cortex and hippocampus. In addition, 5-HT1A receptor and 5-HT transporter (5-HTT) mRNA expressions were measured at the same locations using real-time PCR. The results demonstrated a significant reduction in the serum tryptophan level in rats with exercise-induced chronic fatigue. Moreover, increased 5-HT and decreased 5-HIAA levels were detected in the frontal cortex and hippocampus, and these alterations were significant. Further, 5-HTT expression was significantly increased and 5-HT1A receptor expression was significantly decreased. These results indicate that the 5-HT system plays an important role in the development of exercise-induced chronic fatigue. The 5-HT levels in different parts of the brain increased simultaneously, especially at synapses, and these alterations were associated with changes in 5-HTT and 5-HT1A mRNA expressions.
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Affiliation(s)
- Zhandong Liu
- Department of Neurology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China.
| | - Yanjue Wu
- Centers for Disease Control and Prevention, Atlanta 30329, USA
| | - Tianhui Liu
- Liver Research Center, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Ren Li
- Department of Pharmacy, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Minhao Xie
- China Institute of Sports Medicine, 2-A Sidegate, Tiyuguan Road, Dongcheng District, Beijing 100061, China
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33
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Pagano G, Niccolini F, Fusar-Poli P, Politis M. Serotonin transporter in Parkinson's disease: A meta-analysis of positron emission tomography studies. Ann Neurol 2017; 81:171-180. [DOI: 10.1002/ana.24859] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2016] [Revised: 12/22/2016] [Accepted: 12/22/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Gennaro Pagano
- Neurodegeneration Imaging Group, Institute of Psychiatry, Psychology and Neuroscience (IoPPN); King's College London; London United Kingdom
| | - Flavia Niccolini
- Neurodegeneration Imaging Group, Institute of Psychiatry, Psychology and Neuroscience (IoPPN); King's College London; London United Kingdom
| | - Paolo Fusar-Poli
- Department of Psychosis Studies, Institute of Psychiatry Psychology and Neuroscience (IoPPN); King's College London; London United Kingdom
| | - Marios Politis
- Neurodegeneration Imaging Group, Institute of Psychiatry, Psychology and Neuroscience (IoPPN); King's College London; London United Kingdom
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35
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Frick A, Åhs F, Palmquist ÅM, Pissiota A, Wallenquist U, Fernandez M, Jonasson M, Appel L, Frans Ö, Lubberink M, Furmark T, von Knorring L, Fredrikson M. Overlapping expression of serotonin transporters and neurokinin-1 receptors in posttraumatic stress disorder: a multi-tracer PET study. Mol Psychiatry 2016; 21:1400-7. [PMID: 26619809 DOI: 10.1038/mp.2015.180] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Revised: 09/10/2015] [Accepted: 10/06/2015] [Indexed: 02/07/2023]
Abstract
The brain serotonergic system is colocalized and interacts with the neuropeptidergic substance P/neurokinin-1 (SP/NK1) system. Both these neurochemical systems have independently been implicated in stress and anxiety, but interactions between them might be crucial for human anxiety conditions. Here, we examined the serotonin and substance P/neurokinin-1 (SP/NK1) systems individually as well as their overlapping expression in 16 patients with posttraumatic stress disorder (PTSD) and 16 healthy controls. Participants were imaged with the highly selective radiotracers [(11)C]-3-amino-4-(2-dimethylaminomethylphenylsulfanyl)-benzonitrile (DASB) and [(11)C]GR205171 assessing serotonin transporter (SERT) and NK1 receptor availability, respectively. Voxel-wise analyses in the amygdala, our a priori-defined region of interest, revealed increased number of NK1 receptors, but not SERT in the PTSD group. Symptom severity, as indexed by the Clinician-administered PTSD Scale, was negatively related to SERT availability in the amygdala, and NK1 receptor levels moderated this relationship. Exploratory, voxel-wise whole-brain analyses revealed increased SERT availability in the precentral gyrus and posterior cingulate cortex of PTSD patients. Patients, relative to controls, displayed lower degree of overlapping expression between SERT and NK1 receptors in the putamen, thalamus, insula and lateral orbitofrontal gyrus, lower overlap being associated with higher PTSD symptom severity. Expression overlap also explained more of the symptomatology than did either system individually, underscoring the importance of taking interactions between the neurochemical systems into account. Thus, our results suggest that aberrant serotonergic-SP/NK1 couplings contribute to the pathophysiology of PTSD and, consequently, that normalization of these couplings may be therapeutically important.
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Affiliation(s)
- A Frick
- Department of Psychology, Uppsala University, Uppsala, Sweden
| | - F Åhs
- Department of Psychology, Uppsala University, Uppsala, Sweden.,Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Å M Palmquist
- Department of Psychology, Uppsala University, Uppsala, Sweden
| | - A Pissiota
- Department of Psychology, Uppsala University, Uppsala, Sweden
| | - U Wallenquist
- Department of Psychology, Uppsala University, Uppsala, Sweden
| | - M Fernandez
- Department of Neuroscience, Uppsala University, Uppsala, Sweden
| | - M Jonasson
- Department of Nuclear Medicine and PET, Uppsala University, Uppsala, Sweden
| | - L Appel
- Department of Nuclear Medicine and PET, Uppsala University, Uppsala, Sweden
| | - Ö Frans
- Department of Psychology, Uppsala University, Uppsala, Sweden
| | - M Lubberink
- Department of Nuclear Medicine and PET, Uppsala University, Uppsala, Sweden
| | - T Furmark
- Department of Psychology, Uppsala University, Uppsala, Sweden
| | - L von Knorring
- Department of Neuroscience, Uppsala University, Uppsala, Sweden
| | - M Fredrikson
- Department of Psychology, Uppsala University, Uppsala, Sweden.,Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
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Abstract
PET has deep roots in neuroscience stemming from its first application in brain tumor and brain metabolism imaging. PET emerged over the past few decades and continues to play a prominent role in the study of neurochemistry in the living human brain. Over time, neurochemical imaging with PET has been expanded to address a host of research questions related to, among many others, protein density, drug occupancy, and endogenous neurochemical release. Each of these imaging modes has distinct design and analysis considerations that are critical for enabling quantitative measurements. The number of considerations required for a neurochemical PET study can make it unapproachable. This article aims to orient those interested in neurochemical PET imaging to three of the common imaging modes and to provide some perspective on needs that exist for expansion of neurochemical PET imaging.
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Affiliation(s)
- Michael S Placzek
- Department of Radiology, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA; Department of Psychiatry, McLean Imaging Center, McLean Hospital, Harvard Medical School, Belmont, MA
| | - Wenjun Zhao
- Department of Radiology, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA
| | - Hsiao-Ying Wey
- Department of Radiology, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA
| | | | - Jacob M Hooker
- Department of Radiology, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA.
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Imaging Dopamine and Serotonin Systems on MPTP Monkeys: A Longitudinal PET Investigation of Compensatory Mechanisms. J Neurosci 2016; 36:1577-89. [PMID: 26843639 DOI: 10.1523/jneurosci.2010-15.2016] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
UNLABELLED It is now widely accepted that compensatory mechanisms are involved during the early phase of Parkinson's disease (PD) to delay the expression of motor symptoms. However, the neurochemical mechanisms underlying this presymptomatic period are still unclear. Here, we measured in vivo longitudinal changes of both the dopaminergic and serotonergic systems in seven asymptomatic 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-intoxicated monkeys (when motor symptoms are less apparent) using PET. We used the progressively MPTP-intoxicated monkey model that expresses recovery from motor symptoms to study the changes in dopamine synthesis ([(18)F]DOPA), dopamine D2/D3 receptors ([(11)C]raclopride), and serotonin transporter (11)C-N,N-dimethyl-2-(-2-amino-4-cyanophenylthio) benzylamine ([(11)C]DASB) and serotonin 1A receptor ([(18)F]MPPF) levels between four different states (baseline, early symptomatic, full symptomatic and recovered). During the early symptomatic state, we observed increases of [(18)F]DOPA uptake in the anterior putamen, [(11)C]raclopride binding in the posterior striatum, and 2'-methoxyphenyl-(N-2'-pyridinyl)-p-[(18)F]fluoro-benzamidoethylpiperazine [(18)F]MPPF uptake in the orbitofrontal cortex and dorsal ACC. After recovery from motor symptoms, the results mainly showed decreased [(11)C]raclopride binding in the anterior striatum and limbic ACC. In addition, our findings supported the importance of pallidal dopaminergic neurotransmission in both the early compensatory mechanisms and the functional recovery mechanisms, with reduced aromatic L-amino acid decarboxylase (AAAD) activity closely related to the appearance or perseveration of motor symptoms. In parallel, this study provides preliminary evidence of the role of the serotonergic system in compensatory mechanisms. Nonetheless, future studies are needed to determine whether there are changes in SERT availability in the early symptomatic state and if [(18)F]MPPF PET imaging might be a promising biomarker of early degenerative changes in PD. SIGNIFICANCE STATEMENT The present research provides evidence of the potential of combining a multitracer PET imaging technique and a longitudinal protocol applied on a progressively 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine-intoxicated monkey model to further elucidate the nature of the compensatory mechanisms involved in the preclinical period of Parkinson's disease (PD). In particular, by investigating the dopaminergic and serotonergic changes both presynaptically and postsynaptically at four different motor states (baseline, early symptomatic, full symptomatic, and recovered), this study has allowed us to identify putative biomarkers for future therapeutic interventions to prevent and/or delay disease expression. For example, our findings suggest that the external pallidum could be a new target for cell-based therapies to reduce PD symptoms.
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Macoveanu J, Fisher PM, Madsen MK, Mc Mahon B, Knudsen GM, Siebner HR. Bright-light intervention induces a dose-dependent increase in striatal response to risk in healthy volunteers. Neuroimage 2016; 139:37-43. [PMID: 27318214 DOI: 10.1016/j.neuroimage.2016.06.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Revised: 06/13/2016] [Accepted: 06/14/2016] [Indexed: 02/01/2023] Open
Abstract
Bright-light interventions have successfully been used to reduce depression symptoms in patients with seasonal affective disorder, a depressive disorder most frequently occurring during seasons with reduced daylight availability. Yet, little is known about how light exposure impacts human brain function, for instance on risk taking, a process affected in depressive disorders. Here we examined the modulatory effects of bright-light exposure on brain activity during a risk-taking task. Thirty-two healthy male volunteers living in the greater Copenhagen area received 3weeks of bright-light intervention during the winter season. Adopting a double-blinded dose-response design, bright-light was applied for 30minutes continuously every morning. The individual dose varied between 100 and 11.000lx. Whole-brain functional MRI was performed before and after bright-light intervention to probe how the intervention modifies risk-taking related neural activity during a two-choice gambling task. We also assessed whether inter-individual differences in the serotonin transporter-linked polymorphic region (5-HTTLPR) genotype influenced the effects of bright-light intervention on risk processing. Bright-light intervention led to a dose-dependent increase in risk-taking in the LA/LA group relative to the non-LA/LA group. Further, bright-light intervention enhanced risk-related activity in ventral striatum and head of caudate nucleus in proportion with the individual bright-light dose. The augmentation effect of light exposure on striatal risk processing was not influenced by the 5-HTTLPR-genotype. This study provides novel evidence that in healthy non-depressive individuals bright-light intervention increases striatal processing to risk in a dose-dependent fashion. The findings provide converging evidence that risk processing is sensitive to bright-light exposure during winter.
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Affiliation(s)
- Julian Macoveanu
- Danish Research Centre for Magnetic Resonance, Copenhagen University Hospital, Hvidovre, Denmark; Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark; Psychiatric Center Copenhagen, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark.
| | - Patrick M Fisher
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark; Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - Martin K Madsen
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark; Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark; Institute of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
| | - Brenda Mc Mahon
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark; Psychiatric Center Copenhagen, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark; Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark; Institute of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
| | - Gitte M Knudsen
- Center for Integrated Molecular Brain Imaging, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark; Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark; Institute of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
| | - Hartwig R Siebner
- Danish Research Centre for Magnetic Resonance, Copenhagen University Hospital, Hvidovre, Denmark; Institute of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark; Department of Neurology, Copenhagen University Hospital Bispebjerg, Copenhagen, Denmark
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39
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Stehouwer JS, Goodman MM. Fluorine-18 Radiolabeled PET Tracers for Imaging Monoamine Transporters: Dopamine, Serotonin, and Norepinephrine. PET Clin 2016; 4:101-28. [PMID: 20216936 DOI: 10.1016/j.cpet.2009.05.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
This review focuses on the development of fluorine-18 radiolabeled PET tracers for imaging the dopamine transporter (DAT), serotonin transporter (SERT), and norepinephrine transporter (NET). All successful DAT PET tracers reported to date are members of the 3β-phenyl tropane class and are synthesized from cocaine. Currently available carbon-11 SERT PET tracers come from both the diphenylsulfide and 3β-phenyl nortropane class, but so far only the nortropanes have found success with fluorine-18 derivatives. NET imaging has so far employed carbon-11 and fluorine-18 derivatives of reboxetine but due to defluorination of the fluorine-18 derivatives further research is still necessary.
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Bresch A, Rullmann M, Luthardt J, Arelin K, Becker GA, Patt M, Lobsien D, Baldofski S, Drabe M, Zeisig V, Regenthal R, Blüher M, Hilbert A, Sabri O, Hesse S. In-vivo serotonin transporter availability and somatization in healthy subjects. PERSONALITY AND INDIVIDUAL DIFFERENCES 2016. [DOI: 10.1016/j.paid.2016.01.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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41
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Melasch J, Rullmann M, Hilbert A, Luthardt J, Becker GA, Patt M, Stumvoll M, Blüher M, Villringer A, Arelin K, Meyer PM, Bresch A, Sabri O, Hesse S, Pleger B. Sex differences in serotonin-hypothalamic connections underpin a diminished sense of emotional well-being with increasing body weight. Int J Obes (Lond) 2016; 40:1268-77. [PMID: 27102051 DOI: 10.1038/ijo.2016.63] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Revised: 01/11/2016] [Accepted: 01/28/2016] [Indexed: 12/27/2022]
Abstract
BACKGROUND/OBJECTIVES The neurobiological mechanisms linking obesity to emotional distress related to weight remain largely unknown. PARTICIPANTS/METHODS Here we combined positron emission tomography, using the serotonin transporter (5-HTT) radiotracer [(11)C]-3-amino-4-(2-dimethylaminomethylphenylsulfanyl)-benzonitrile, with functional connectivity magnetic resonance imaging, the Beck Depression Inventory (BDI-II) and the Impact of Weight on Quality of Life-Lite questionnaire (IWQOL-Lite) to investigate the role of central serotonin in the severity of depression (BDI-II), as well as in the loss of emotional well-being with body weight (IWQOL-Lite). RESULTS In a group of lean to morbidly obese individuals (n=28), we found sex differences in the 5-HTT availability-related connectivity of the hypothalamus. Males (n=11) presented a strengthened connectivity to the lateral orbitofrontal cortex, whereas in females (n=17) we found strengethened projections to the ventral striatum. Both regions are known as reward regions involved in mediating the emotional response to food. Their resting-state activity correlated positively to the body mass index (BMI) and IWQOL-Lite scores, suggesting that each region in both sexes also underpins a diminished sense of emotional well-being with body weight. Contrarily to males, we found that in females also the BDI-II positively correlated with the BMI and by trend with the activity in ventral striatum, suggesting that in females an increased body weight may convey to other mood dimensions than those weight-related ones included in the IWQOL-Lite. CONCLUSIONS This study suggests sex differences in serotonin-hypothalamic connections to brain regions of the reward circuitry underpinning a diminished sense of emotional well-being with an increasing body weight.
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Affiliation(s)
- J Melasch
- IFB Adiposity Diseases, University Medical Centre, Leipzig, Germany.,Department of Nuclear Medicine, University Hospital Leipzig, Leipzig, Germany
| | - M Rullmann
- IFB Adiposity Diseases, University Medical Centre, Leipzig, Germany.,Department of Nuclear Medicine, University Hospital Leipzig, Leipzig, Germany
| | - A Hilbert
- IFB Adiposity Diseases, University Medical Centre, Leipzig, Germany
| | - J Luthardt
- Department of Nuclear Medicine, University Hospital Leipzig, Leipzig, Germany
| | - G A Becker
- Department of Nuclear Medicine, University Hospital Leipzig, Leipzig, Germany
| | - M Patt
- Department of Nuclear Medicine, University Hospital Leipzig, Leipzig, Germany
| | - M Stumvoll
- IFB Adiposity Diseases, University Medical Centre, Leipzig, Germany.,Medical Department III, University Hospital Leipzig, Leipzig, Germany
| | - M Blüher
- IFB Adiposity Diseases, University Medical Centre, Leipzig, Germany.,Medical Department III, University Hospital Leipzig, Leipzig, Germany
| | - A Villringer
- IFB Adiposity Diseases, University Medical Centre, Leipzig, Germany.,Department of Neurology, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany.,Clinic for Cognitive Neurology, University Hospital Leipzig, Leipzig, Germany
| | - K Arelin
- IFB Adiposity Diseases, University Medical Centre, Leipzig, Germany.,Department of Neurology, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany.,Clinic for Cognitive Neurology, University Hospital Leipzig, Leipzig, Germany
| | - P M Meyer
- Department of Nuclear Medicine, University Hospital Leipzig, Leipzig, Germany
| | - A Bresch
- Department of Nuclear Medicine, University Hospital Leipzig, Leipzig, Germany
| | - O Sabri
- IFB Adiposity Diseases, University Medical Centre, Leipzig, Germany.,Department of Nuclear Medicine, University Hospital Leipzig, Leipzig, Germany
| | - S Hesse
- IFB Adiposity Diseases, University Medical Centre, Leipzig, Germany.,Department of Nuclear Medicine, University Hospital Leipzig, Leipzig, Germany
| | - B Pleger
- IFB Adiposity Diseases, University Medical Centre, Leipzig, Germany.,Department of Neurology, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany.,Clinic for Cognitive Neurology, University Hospital Leipzig, Leipzig, Germany.,BG University Clinic Bergmannsheil, Department of Neurology, Ruhr University Bochum, Bochum, Germany
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Van Laeken N, Taylor O, Polis I, Neyt S, Kersemans K, Dobbeleir A, Saunders J, Goethals I, Peremans K, De Vos F. In Vivo Evaluation of Blood Based and Reference Tissue Based PET Quantifications of [11C]DASB in the Canine Brain. PLoS One 2016; 11:e0148943. [PMID: 26859850 PMCID: PMC4747581 DOI: 10.1371/journal.pone.0148943] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Accepted: 01/23/2016] [Indexed: 11/19/2022] Open
Abstract
This first-in-dog study evaluates the use of the PET-radioligand [11C]DASB to image the density and availability of the serotonin transporter (SERT) in the canine brain. Imaging the serotonergic system could improve diagnosis and therapy of multiple canine behavioural disorders. Furthermore, as many similarities are reported between several human neuropsychiatric conditions and naturally occurring canine behavioural disorders, making this tracer available for use in dogs also provide researchers an interesting non-primate animal model to investigate human disorders. Five adult beagles underwent a 90 minutes dynamic PET scan and arterial whole blood was sampled throughout the scan. For each ROI, the distribution volume (VT), obtained via the one- and two- tissue compartment model (1-TC, 2-TC) and the Logan Plot, was calculated and the goodness-of-fit was evaluated by the Akaike Information Criterion (AIC). For the preferred compartmental model BPND values were estimated and compared with those derived by four reference tissue models: 4-parameter RTM, SRTM2, MRTM2 and the Logan reference tissue model. The 2-TC model indicated in 61% of the ROIs a better fit compared to the 1-TC model. The Logan plot produced almost identical VT values and can be used as an alternative. Compared with the 2-TC model, all investigated reference tissue models showed high correlations but small underestimations of the BPND-parameter. The highest correlation was achieved with the Logan reference tissue model (Y = 0.9266 x + 0.0257; R2 = 0.9722). Therefore, this model can be put forward as a non-invasive standard model for future PET-experiments with [11C]DASB in dogs.
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Affiliation(s)
- Nick Van Laeken
- Department of Radiopharmacy, Ghent University, Ghent, Belgium
- * E-mail:
| | - Olivia Taylor
- Department of Medical Imaging and Small Animal Orthopedics, Ghent University, Ghent, Belgium
| | - Ingeborgh Polis
- Department of Medicine and Clinical Biology of Small Animals, Ghent University, Ghent, Belgium
| | - Sara Neyt
- Department of Radiopharmacy, Ghent University, Ghent, Belgium
| | - Ken Kersemans
- Department of Radiology and Nuclear Medicine, Ghent University Hospital, Ghent, Belgium
| | - Andre Dobbeleir
- Department of Radiology and Nuclear Medicine, Ghent University Hospital, Ghent, Belgium
| | - Jimmy Saunders
- Department of Medical Imaging and Small Animal Orthopedics, Ghent University, Ghent, Belgium
| | - Ingeborg Goethals
- Department of Radiology and Nuclear Medicine, Ghent University Hospital, Ghent, Belgium
| | - Kathelijne Peremans
- Department of Medical Imaging and Small Animal Orthopedics, Ghent University, Ghent, Belgium
| | - Filip De Vos
- Department of Radiopharmacy, Ghent University, Ghent, Belgium
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Abstract
Positron emission tomography (PET) is a minimally invasive imaging procedure with a wide range of clinical and research applications. PET allows for the three-dimensional mapping of administered positron-emitting radiopharmaceuticals such as (18)F-fluorodeoxyglucose (for imaging glucose metabolism). PET enables the study of biologic function in both health and disease, in contrast to magnetic resonance imaging (MRI) and computed tomography (CT), that are more suited to study a body's morphologic changes, although functional MRI can also be used to study certain brain functions by measuring blood flow changes during task performance. This chapter first provides an overview of the basic physics principles and instrumentation behind PET methodology, with an introduction to the merits of merging functional PET imaging with anatomic CT or MRI imaging. We then focus on clinical neurologic disorders, and reference research on relevant PET radiopharmaceuticals when applicable. We then provide an overview of PET scan interpretation and findings in several specific neurologic disorders such as dementias, epilepsy, movement disorders, infection, cerebrovascular disorders, and brain tumors.
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Affiliation(s)
- Katherine Lameka
- Department of Radiology, Tufts University, Boston and Department of Radiology, Baystate Medical Center, Springfield, MA, USA.
| | - Michael D Farwell
- Department of Radiology, Perelman School of Medicine of the University of Pennsylvania, Philadelphia, PA, USA
| | - Masanori Ichise
- Molecular Neuroimaging Program, Molecular Imaging Center, National Institute of Radiological Sciences, Anagawa, Inage, Chiba, Japan
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Taylor O, Van Laeken N, De Vos F, Polis I, Bosmans T, Goethals I, Achten R, Dobbeleir A, Vandermeulen E, Baeken C, Saunders J, Peremans K. In vivo quantification of the [(11)C]DASB binding in the normal canine brain using positron emission tomography. BMC Vet Res 2015; 11:308. [PMID: 26704517 PMCID: PMC4690221 DOI: 10.1186/s12917-015-0622-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Accepted: 12/18/2015] [Indexed: 11/17/2022] Open
Abstract
Background [11C]-3-amino-4-(2-dimethylaminomethyl-phenylsulfanyl)-benzonitrile ([11C]DASB) is currently the mostly used radiotracer for positron emission tomography (PET) quantitative studies of the serotonin transporter (SERT) in the human brain but has never been validated in dogs. The first objective was therefore to evaluate normal [11C]DASB distribution in different brain regions of healthy dogs using PET. The second objective was to provide less invasive and more convenient alternative methods to the arterial sampling-based kinetic analysis. Results A dynamic acquisition of the brain was performed during 90 min. The PET images were coregistered with the magnetic resonance images taken prior to the study in order to manually drawn 20 regions of interest (ROIs). The highest radioactivity concentration of [11C]DASB was observed in the hypothalamus, raphe nuclei and thalamus and lowest levels in the parietal cortex, occipital cortex and cerebellum. The regional radioactivity in those 20 ROIs was quantified using the multilinear reference tissue model 2 (MRTM2) and a semi-quantitative method. The values showed least variability between 40 and 60 min and this time interval was set as the optimal time interval for [11C]DASB quantification in the canine brain. The correlation (R2) between the MRTM2 and the semi-quantitative method using the data between 40 and 60 min was 99.3 % (two-tailed p-value < 0.01). Conclusions The reference tissue models and semi-quantitative method provide a more convenient alternative to invasive arterial sampling models in the evaluation of the SERT of the normal canine brain. The optimal time interval for static scanning is set at 40 to 60 min after tracer injection.
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Affiliation(s)
- Olivia Taylor
- Department of Medical Imaging and Small Animal Orthopedics, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium.
| | - Nick Van Laeken
- Laboratory of Radiopharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, 9000, Ghent, Belgium.
| | - Filip De Vos
- Laboratory of Radiopharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, 9000, Ghent, Belgium.
| | - Ingeborgh Polis
- Department of Medicine and Clinical Biology of Small Animals, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium.
| | - Tim Bosmans
- Department of Medicine and Clinical Biology of Small Animals, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium.
| | - Ingeborg Goethals
- Department of Nuclear Medicine, Ghent University Hospital, Ghent University, De Pintelaan 185, 9000, Ghent, Belgium.
| | - Rik Achten
- Department of Radiology, Ghent University Hospital, Ghent University, De Pintelaan 185, 9000, Ghent, Belgium.
| | - Andre Dobbeleir
- Department of Medical Imaging and Small Animal Orthopedics, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium. .,Department of Nuclear Medicine, Ghent University Hospital, Ghent University, De Pintelaan 185, 9000, Ghent, Belgium.
| | - Eva Vandermeulen
- Department of Medical Imaging and Small Animal Orthopedics, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium.
| | - Chris Baeken
- Department of Psychiatry and Medical Psychology, Ghent University Hospital, Ghent University, De Pintelaan 185, 9000, Ghent, Belgium.
| | - Jimmy Saunders
- Department of Medical Imaging and Small Animal Orthopedics, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium.
| | - Kathelijne Peremans
- Department of Medical Imaging and Small Animal Orthopedics, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium.
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Harrison SJ, Tyrer AE, Levitan RD, Xu X, Houle S, Wilson AA, Nobrega JN, Rusjan PM, Meyer JH. Light therapy and serotonin transporter binding in the anterior cingulate and prefrontal cortex. Acta Psychiatr Scand 2015; 132:379-88. [PMID: 25891484 PMCID: PMC4942271 DOI: 10.1111/acps.12424] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 03/17/2015] [Indexed: 11/27/2022]
Abstract
OBJECTIVE To investigate the effects of light therapy on serotonin transporter binding (5-HTT BPND ), an index of 5-HTT levels, in the anterior cingulate and prefrontal cortices (ACC and PFC) of healthy individuals during the fall and winter. Twenty-five per cent of healthy individuals experience seasonal mood changes that affect functioning. 5-HTT BPND has been found to be higher across multiple brain regions in the fall and winter relative to spring and summer, and elevated 5-HTT BPND may lead to extracellular serotonin loss and low mood. We hypothesized that, during the fall and winter, light therapy would reduce 5-HTT BPND in the ACC and PFC, which sample brain regions involved in mood regulation. METHOD In a single-blind, placebo-controlled, counterbalanced, crossover design, [(11) C]DASB positron emission tomography was used measure 5-HTT BPND following light therapy and placebo conditions during fall and winter. RESULTS In winter, light therapy significantly decreased 5-HTT BPND by 12% in the ACC relative to placebo (F1,9 = 18.04, P = 0.002). In the fall, no significant change in 5-HTT BPND was found in any region across conditions. CONCLUSION These results identify, for the first time, a central biomarker associated with the intervention of light therapy in humans which may be applied to further develop this treatment for prevention of seasonal depression.
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Affiliation(s)
- S J Harrison
- CAMH Research Imaging Centre and Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health and Departments of Psychiatry, Pharmacology and Toxicology, and Institute of Medical Sciences, University of Toronto, Toronto, ON, Canada
- Behavioural Neurobiology Laboratory and Campbell Family Mental Health Research Institute and Departments of Psychiatry, Pharmacology and Toxicology, and Institute of Medical Sciences, University of Toronto, Toronto, ON, Canada
| | - A E Tyrer
- CAMH Research Imaging Centre and Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health and Departments of Psychiatry, Pharmacology and Toxicology, and Institute of Medical Sciences, University of Toronto, Toronto, ON, Canada
| | - R D Levitan
- CAMH Research Imaging Centre and Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health and Departments of Psychiatry, Pharmacology and Toxicology, and Institute of Medical Sciences, University of Toronto, Toronto, ON, Canada
| | - X Xu
- CAMH Research Imaging Centre and Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health and Departments of Psychiatry, Pharmacology and Toxicology, and Institute of Medical Sciences, University of Toronto, Toronto, ON, Canada
| | - S Houle
- CAMH Research Imaging Centre and Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health and Departments of Psychiatry, Pharmacology and Toxicology, and Institute of Medical Sciences, University of Toronto, Toronto, ON, Canada
| | - A A Wilson
- CAMH Research Imaging Centre and Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health and Departments of Psychiatry, Pharmacology and Toxicology, and Institute of Medical Sciences, University of Toronto, Toronto, ON, Canada
| | - J N Nobrega
- CAMH Research Imaging Centre and Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health and Departments of Psychiatry, Pharmacology and Toxicology, and Institute of Medical Sciences, University of Toronto, Toronto, ON, Canada
- Behavioural Neurobiology Laboratory and Campbell Family Mental Health Research Institute and Departments of Psychiatry, Pharmacology and Toxicology, and Institute of Medical Sciences, University of Toronto, Toronto, ON, Canada
| | - P M Rusjan
- CAMH Research Imaging Centre and Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health and Departments of Psychiatry, Pharmacology and Toxicology, and Institute of Medical Sciences, University of Toronto, Toronto, ON, Canada
| | - J H Meyer
- CAMH Research Imaging Centre and Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health and Departments of Psychiatry, Pharmacology and Toxicology, and Institute of Medical Sciences, University of Toronto, Toronto, ON, Canada
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Walker M, Ehrlichmann W, Stahlschmidt A, Pichler BJ, Fischer K. In Vivo Evaluation of 11C-DASB for Quantitative SERT Imaging in Rats and Mice. J Nucl Med 2015; 57:115-21. [PMID: 26514178 DOI: 10.2967/jnumed.115.163683] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Accepted: 10/13/2015] [Indexed: 11/16/2022] Open
Abstract
UNLABELLED Serotonin, or 5-hydroxytryptamine (5-HT), plays a key role in the central nervous system and is involved in many essential neurologic processes such as mood, social behavior, and sleep. The serotonin transporter ligand (11)C-3-amino-4(2-dimethylaminomethyl-phenylsufanyl)-benzonitrile ((11)C-DASB) has been used to determine nondisplaceable binding potential (BPND), which is defined as the quotient of the available receptor density (Bavail) and the apparent equilibrium dissociation rate constant (1/appKD) under in vivo conditions. Because of the increasing number of animal models of human diseases, there is a pressing need to evaluate the applicability of (11)C-DASB to rats and mice. Here, we assessed the feasibility of using (11)C-DASB for quantification of serotonin transporter (SERT) density and affinity in vivo in rats and mice. METHODS Rats and mice underwent 4 PET scans with increasing doses of the unlabeled ligand to calculate Bavail and appKD using the multiple-ligand concentration transporter assay. An additional PET scan was performed to calculate test-retest reproducibility and reliability. BPND was calculated using the simplified reference tissue model, and the results for different reference regions were compared. RESULTS Displaceable binding of (11)C-DASB was found in all brain regions of both rats and mice, with the highest binding being in the thalamus and the lowest in the cerebellum. In rats, displaceable binding was largely reduced in the cerebellar cortex, which in mice was spatially indistinguishable from cerebellar white matter. Use of the cerebellum with fully saturated binding sites as the reference region did not lead to reliable results. Test-retest reproducibility in the thalamus was more than 90% in both mice and rats. In rats, Bavail, appKD, and ED50 were 3.9 ± 0.4 pmol/mL, 2.2 ± 0.4 nM, and 12.0 ± 2.6 nmol/kg, respectively, whereas analysis of the mouse measurements resulted in inaccurate fits due to the high injected tracer mass. CONCLUSION Our data showed that in rats, (11)C-DASB can be used to quantify SERT density with good reproducibility. BPND agreed with the distribution of SERT in the rat brain. It remains difficult to estimate quantitative parameters accurately from mouse measurements because of the high injected tracer mass and underestimation of the binding parameters due to high displaceable binding in the reference region.
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Affiliation(s)
- Michael Walker
- Department of Preclinical Imaging and Radiopharmacy, Werner Siemens Imaging Center, Eberhard Karls University of Tübingen, Tübingen, Germany
| | - Walter Ehrlichmann
- Department of Preclinical Imaging and Radiopharmacy, Werner Siemens Imaging Center, Eberhard Karls University of Tübingen, Tübingen, Germany
| | - Anke Stahlschmidt
- Department of Preclinical Imaging and Radiopharmacy, Werner Siemens Imaging Center, Eberhard Karls University of Tübingen, Tübingen, Germany
| | - Bernd J Pichler
- Department of Preclinical Imaging and Radiopharmacy, Werner Siemens Imaging Center, Eberhard Karls University of Tübingen, Tübingen, Germany
| | - Kristina Fischer
- Department of Preclinical Imaging and Radiopharmacy, Werner Siemens Imaging Center, Eberhard Karls University of Tübingen, Tübingen, Germany
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Gunn RN, Slifstein M, Searle GE, Price JC. Quantitative imaging of protein targets in the human brain with PET. Phys Med Biol 2015; 60:R363-411. [DOI: 10.1088/0031-9155/60/22/r363] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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48
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Sanchez C, Asin KE, Artigas F. Vortioxetine, a novel antidepressant with multimodal activity: Review of preclinical and clinical data. Pharmacol Ther 2015; 145:43-57. [DOI: 10.1016/j.pharmthera.2014.07.001] [Citation(s) in RCA: 315] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Accepted: 07/02/2014] [Indexed: 12/21/2022]
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49
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Finnema SJ, Scheinin M, Shahid M, Lehto J, Borroni E, Bang-Andersen B, Sallinen J, Wong E, Farde L, Halldin C, Grimwood S. Application of cross-species PET imaging to assess neurotransmitter release in brain. Psychopharmacology (Berl) 2015; 232:4129-57. [PMID: 25921033 PMCID: PMC4600473 DOI: 10.1007/s00213-015-3938-6] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Accepted: 04/09/2015] [Indexed: 01/03/2023]
Abstract
RATIONALE This review attempts to summarize the current status in relation to the use of positron emission tomography (PET) imaging in the assessment of synaptic concentrations of endogenous mediators in the living brain. OBJECTIVES Although PET radioligands are now available for more than 40 CNS targets, at the initiation of the Innovative Medicines Initiative (IMI) "Novel Methods leading to New Medications in Depression and Schizophrenia" (NEWMEDS) in 2009, PET radioligands sensitive to an endogenous neurotransmitter were only validated for dopamine. NEWMEDS work-package 5, "Cross-species and neurochemical imaging (PET) methods for drug discovery", commenced with a focus on developing methods enabling assessment of changes in extracellular concentrations of serotonin and noradrenaline in the brain. RESULTS Sharing the workload across institutions, we utilized in vitro techniques with cells and tissues, in vivo receptor binding and microdialysis techniques in rodents, and in vivo PET imaging in non-human primates and humans. Here, we discuss these efforts and review other recently published reports on the use of radioligands to assess changes in endogenous levels of dopamine, serotonin, noradrenaline, γ-aminobutyric acid, glutamate, acetylcholine, and opioid peptides. The emphasis is on assessment of the availability of appropriate translational tools (PET radioligands, pharmacological challenge agents) and on studies in non-human primates and human subjects, as well as current challenges and future directions. CONCLUSIONS PET imaging directed at investigating changes in endogenous neurochemicals, including the work done in NEWMEDS, have highlighted an opportunity to further extend the capability and application of this technology in drug development.
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Affiliation(s)
- Sjoerd J. Finnema
- />Department of Clinical Neuroscience, Center for Psychiatric Research, Karolinska Institutet, Stockholm, Sweden
| | - Mika Scheinin
- />Department of Pharmacology, Drug Development and Therapeutics, University of Turku, Turku, Finland , />Unit of Clinical Pharmacology, Turku University Hospital, Turku, Finland
| | - Mohammed Shahid
- />Research and Development, Orion Corporation, Orion Pharma, Turku, Finland
| | - Jussi Lehto
- />Department of Pharmacology, Drug Development and Therapeutics, University of Turku, Turku, Finland
| | - Edilio Borroni
- />Neuroscience Department, Hoffman-La Roche, Basel, Switzerland
| | | | - Jukka Sallinen
- />Research and Development, Orion Corporation, Orion Pharma, Turku, Finland
| | - Erik Wong
- />Neuroscience Innovative Medicine Unit, AstraZeneca, Wilmington, DE USA
| | - Lars Farde
- />Department of Clinical Neuroscience, Center for Psychiatric Research, Karolinska Institutet, Stockholm, Sweden , />Translational Science Center at Karolinska Institutet, AstraZeneca, Stockholm, Sweden
| | - Christer Halldin
- />Department of Clinical Neuroscience, Center for Psychiatric Research, Karolinska Institutet, Stockholm, Sweden
| | - Sarah Grimwood
- Neuroscience Research Unit, Pfizer Inc, Cambridge, MA, USA. .,, 610 Main Street, Cambridge, MA, 02139, USA.
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Todd Ogden R, Zanderigo F, Parsey RV. Estimation of in vivo nonspecific binding in positron emission tomography studies without requiring a reference region. Neuroimage 2014; 108:234-42. [PMID: 25542534 DOI: 10.1016/j.neuroimage.2014.12.038] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Revised: 11/26/2014] [Accepted: 12/14/2014] [Indexed: 11/25/2022] Open
Abstract
Estimation of outcome measures in in vivo neuroreceptor mapping with positron emission tomography (PET) commonly depends on an assumption of uniform nondisplaceable binding throughout the brain. In many cases, this can be estimated based on data from a "reference region," an area of the brain devoid of the receptor of interest. However, often such a region does not exist, as there are some receptors everywhere throughout the brain. Erroneously designating a region as a "reference" can lead to biased estimation, and furthermore, if the level of specific binding in the purported reference region differs between comparison groups, the validity of resulting conclusions may be called into question. We present a method for estimation of all common PET outcome measures that can provide good estimates even when no reference region exists. Our aim is to use information from several regions simultaneously to estimate the information common to all regions. By not requiring specification (or validation) of a reference region, such an approach can provide an automated, objective approach for kinetic modeling of PET data. We illustrate the performance of these methods on simulated data, human [(11)C]WAY-100635 data, and [(11)C]CUMI-101 blocking data in baboons. We show close agreement between estimates obtained by using the proposed method (which does not require a reference region) and estimates based on either a reference region or a blocking study.
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Affiliation(s)
- R Todd Ogden
- Department of Biostatistics, Columbia University, 10032, New York, NY, USA; Department of Molecular Imaging and Neuropathology, New York State Psychiatric Institute, 10032, New York, NY, USA.
| | - Francesca Zanderigo
- Department of Molecular Imaging and Neuropathology, New York State Psychiatric Institute, 10032, New York, NY, USA
| | - Ramin V Parsey
- Departments of Psychiatry and Radiology, Stony Brook University, Stony Brook, 11794, NY, USA
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