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Gallagher E, Hou C, Zhu Y, Hsieh CJ, Lee H, Li S, Xu K, Henderson P, Chroneos R, Sheldon M, Riley S, Luk KC, Mach RH, McManus MJ. Positron Emission Tomography with [ 18F]ROStrace Reveals Progressive Elevations in Oxidative Stress in a Mouse Model of Alpha-Synucleinopathy. Int J Mol Sci 2024; 25:4943. [PMID: 38732162 PMCID: PMC11084161 DOI: 10.3390/ijms25094943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2024] [Revised: 04/23/2024] [Accepted: 04/25/2024] [Indexed: 05/13/2024] Open
Abstract
The synucleinopathies are a diverse group of neurodegenerative disorders characterized by the accumulation of aggregated alpha-synuclein (aSyn) in vulnerable populations of brain cells. Oxidative stress is both a cause and a consequence of aSyn aggregation in the synucleinopathies; however, noninvasive methods for detecting oxidative stress in living animals have proven elusive. In this study, we used the reactive oxygen species (ROS)-sensitive positron emission tomography (PET) radiotracer [18F]ROStrace to detect increases in oxidative stress in the widely-used A53T mouse model of synucleinopathy. A53T-specific elevations in [18F]ROStrace signal emerged at a relatively early age (6-8 months) and became more widespread within the brain over time, a pattern which paralleled the progressive development of aSyn pathology and oxidative damage in A53T brain tissue. Systemic administration of lipopolysaccharide (LPS) also caused rapid and long-lasting elevations in [18F]ROStrace signal in A53T mice, suggesting that chronic, aSyn-associated oxidative stress may render these animals more vulnerable to further inflammatory insult. Collectively, these results provide novel evidence that oxidative stress is an early and chronic process during the development of synucleinopathy and suggest that PET imaging with [18F]ROStrace holds promise as a means of detecting aSyn-associated oxidative stress noninvasively.
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Affiliation(s)
- Evan Gallagher
- Department of Anesthesia and Critical Care Medicine, Children’s Hospital of Philadelphia, Philadelphia, PA 19104, USA; (E.G.)
- Department of Radiology, University of Pennsylvania, Philadelphia, PA 19104, USA; (C.H.); (R.H.M.)
| | - Catherine Hou
- Department of Radiology, University of Pennsylvania, Philadelphia, PA 19104, USA; (C.H.); (R.H.M.)
| | - Yi Zhu
- Department of Anesthesia and Critical Care Medicine, Children’s Hospital of Philadelphia, Philadelphia, PA 19104, USA; (E.G.)
| | - Chia-Ju Hsieh
- Department of Radiology, University of Pennsylvania, Philadelphia, PA 19104, USA; (C.H.); (R.H.M.)
| | - Hsiaoju Lee
- Department of Radiology, University of Pennsylvania, Philadelphia, PA 19104, USA; (C.H.); (R.H.M.)
| | - Shihong Li
- Department of Radiology, University of Pennsylvania, Philadelphia, PA 19104, USA; (C.H.); (R.H.M.)
| | - Kuiying Xu
- Department of Radiology, University of Pennsylvania, Philadelphia, PA 19104, USA; (C.H.); (R.H.M.)
| | - Patrick Henderson
- Department of Anesthesia and Critical Care Medicine, Children’s Hospital of Philadelphia, Philadelphia, PA 19104, USA; (E.G.)
| | - Rea Chroneos
- Department of Anesthesia and Critical Care Medicine, Children’s Hospital of Philadelphia, Philadelphia, PA 19104, USA; (E.G.)
| | - Malkah Sheldon
- Department of Anesthesia and Critical Care Medicine, Children’s Hospital of Philadelphia, Philadelphia, PA 19104, USA; (E.G.)
| | - Shaipreeah Riley
- Department of Anesthesia and Critical Care Medicine, Children’s Hospital of Philadelphia, Philadelphia, PA 19104, USA; (E.G.)
| | - Kelvin C. Luk
- Department of Pathology and Laboratory Medicine, Institute on Aging and Center for Neurodegenerative Disease Research, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Robert H. Mach
- Department of Radiology, University of Pennsylvania, Philadelphia, PA 19104, USA; (C.H.); (R.H.M.)
| | - Meagan J. McManus
- Department of Anesthesia and Critical Care Medicine, Children’s Hospital of Philadelphia, Philadelphia, PA 19104, USA; (E.G.)
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Shatalina E, Whitehurst TS, Onwordi EC, Gilbert BJ, Rizzo G, Whittington A, Mansur A, Tsukada H, Marques TR, Natesan S, Rabiner EA, Wall MB, Howes OD. Mitochondrial complex I density is associated with IQ and cognition in cognitively healthy adults: an in vivo [ 18F]BCPP-EF PET study. EJNMMI Res 2024; 14:41. [PMID: 38632153 PMCID: PMC11024075 DOI: 10.1186/s13550-024-01099-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Accepted: 03/23/2024] [Indexed: 04/19/2024] Open
Abstract
BACKGROUND Mitochondrial function plays a key role in regulating neurotransmission and may contribute to general intelligence. Mitochondrial complex I (MC-I) is the largest enzyme of the respiratory chain. Recently, it has become possible to measure MC-I distribution in vivo, using a novel positron emission tomography tracer [18F]BCPP-EF, thus, we set out to investigate the association between MC-I distribution and measures of cognitive function in the living healthy brain. RESULTS Analyses were performed in a voxel-wise manner and identified significant associations between [18F]BCPP-EF DVRCS-1 in the precentral gyrus and parietal lobes and WAIS-IV predicted IQ, WAIS-IV arithmetic and WAIS-IV symbol-digit substitution scores (voxel-wise Pearson's correlation coefficients transformed to Z-scores, thresholded at Z = 2.3 family-wise cluster correction at p < 0.05, n = 16). Arithmetic scores were associated with middle frontal and post-central gyri tracer uptake, symbol-digit substitution scores were associated with precentral gyrus tracer uptake. RAVLT recognition scores were associated with [18F]BCPP-EF DVRCS-1 in the middle frontal gyrus, post-central gyrus, occipital and parietal regions (n = 20). CONCLUSIONS Taken together, our findings support the theory that mitochondrial function may contribute to general intelligence and indicate that interindividual differences in MC-I should be a key consideration for research into mitochondrial dysfunction in conditions with cognitive impairment.
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Affiliation(s)
- Ekaterina Shatalina
- Psychiatric Imaging Group, MRC London Institute of Medical Sciences, Hammersmith Hospital, Imperial College London, London, UK.
- Institute of Psychiatry, Psychology and Neuroscience (IoPPN), Kings College London, London, UK.
| | - Thomas S Whitehurst
- Psychiatric Imaging Group, MRC London Institute of Medical Sciences, Hammersmith Hospital, Imperial College London, London, UK
- Institute of Psychiatry, Psychology and Neuroscience (IoPPN), Kings College London, London, UK
| | - Ellis Chika Onwordi
- Psychiatric Imaging Group, MRC London Institute of Medical Sciences, Hammersmith Hospital, Imperial College London, London, UK
- Institute of Psychiatry, Psychology and Neuroscience (IoPPN), Kings College London, London, UK
- Centre for Psychiatry and Mental Health, Wolfson Institute of Population Health, Queen Mary University of London, London, UK
| | | | | | | | | | | | - Tiago Reis Marques
- Institute of Psychiatry, Psychology and Neuroscience (IoPPN), Kings College London, London, UK
- Faculty of Medicine, Imperial College London, London, UK
| | - Sridhar Natesan
- Psychiatric Imaging Group, MRC London Institute of Medical Sciences, Hammersmith Hospital, Imperial College London, London, UK
- Institute of Psychiatry, Psychology and Neuroscience (IoPPN), Kings College London, London, UK
| | - Eugenii A Rabiner
- Institute of Psychiatry, Psychology and Neuroscience (IoPPN), Kings College London, London, UK
- Invicro, London, UK
| | - Matthew B Wall
- Faculty of Medicine, Imperial College London, London, UK
- Invicro, London, UK
- Clinical Psychopharmacology Unit, University College London, London, UK
| | - Oliver D Howes
- Psychiatric Imaging Group, MRC London Institute of Medical Sciences, Hammersmith Hospital, Imperial College London, London, UK
- Institute of Psychiatry, Psychology and Neuroscience (IoPPN), Kings College London, London, UK
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Visser M, O'Brien JT, Mak E. In vivo imaging of synaptic density in neurodegenerative disorders with positron emission tomography: A systematic review. Ageing Res Rev 2024; 94:102197. [PMID: 38266660 DOI: 10.1016/j.arr.2024.102197] [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: 11/17/2023] [Revised: 01/09/2024] [Accepted: 01/12/2024] [Indexed: 01/26/2024]
Abstract
Positron emission tomography (PET) with radiotracers that bind to synaptic vesicle glycoprotein 2 A (SV2A) enables quantification of synaptic density in the living human brain. Assessing the regional distribution and severity of synaptic density loss will contribute to our understanding of the pathological processes that precede atrophy in neurodegeneration. In this systematic review, we provide a discussion of in vivo SV2A PET imaging research for quantitative assessment of synaptic density in various dementia conditions: amnestic Mild Cognitive Impairment and Alzheimer's disease, Frontotemporal dementia, Progressive supranuclear palsy and Corticobasal degeneration, Parkinson's disease and Dementia with Lewy bodies, Huntington's disease, and Spinocerebellar Ataxia. We discuss the main findings concerning group differences and clinical-cognitive correlations, and explore relations between SV2A PET and other markers of pathology. Additionally, we touch upon synaptic density in healthy ageing and outcomes of radiotracer validation studies. Studies were identified on PubMed and Embase between 2018 and 2023; last searched on the 3rd of July 2023. A total of 36 studies were included, comprising 5 on normal ageing, 21 clinical studies, and 10 validation studies. Extracted study characteristics were participant details, methodological aspects, and critical findings. In summary, the small but growing literature on in vivo SV2A PET has revealed different spatial patterns of synaptic density loss among various neurodegenerative disorders that correlate with cognitive functioning, supporting the potential role of SV2A PET imaging for differential diagnosis. SV2A PET imaging shows tremendous capability to provide novel insights into the aetiology of neurodegenerative disorders and great promise as a biomarker for synaptic density reduction. Novel directions for future synaptic density research are proposed, including (a) longitudinal imaging in larger patient cohorts of preclinical dementias, (b) multi-modal mapping of synaptic density loss onto other pathological processes, and (c) monitoring therapeutic responses and assessing drug efficacy in clinical trials.
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Affiliation(s)
- Malouke Visser
- Department of Psychiatry, School of Clinical Medicine, Addenbrooke's Hospital, University of Cambridge, United Kingdom; Neuropsychology and Rehabilitation Psychology, Donders Institute for Brain, Cognition and Behaviour, Radboud University, Nijmegen, the Netherlands
| | - John T O'Brien
- Department of Psychiatry, School of Clinical Medicine, Addenbrooke's Hospital, University of Cambridge, United Kingdom
| | - Elijah Mak
- Department of Psychiatry, School of Clinical Medicine, Addenbrooke's Hospital, University of Cambridge, United Kingdom.
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Knyzeliene A, Shaw R, Balogh V, Tavares AAS. Kinetic Modeling Methods in Preclinical Positron Emission Tomography Imaging. Methods Mol Biol 2024; 2729:441-455. [PMID: 38006511 DOI: 10.1007/978-1-0716-3499-8_25] [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] [Indexed: 11/27/2023]
Abstract
There is an expanding number of applications for preclinical positron emission tomography (PET) imaging. Kinetic modeling of PET data provides rich multiparameter information on radiotracer uptake and binding in tissue from a single experiment. In this chapter, we provide a practical step-by-step protocol to assist with collection of PET data for kinetic modeling studies in rats and mice.
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Affiliation(s)
| | - Robert Shaw
- Queen's Medical Research Institute, Edinburgh, UK
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5
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Bartlett EA, Zanderigo F, Stanley B, Choo TH, Galfalvy HC, Pantazatos SP, Sublette ME, Miller JM, Oquendo MA, Mann JJ. In vivo serotonin transporter and 1A receptor binding potential and ecological momentary assessment (EMA) of stress in major depression and suicidal behavior. Eur Neuropsychopharmacol 2023; 70:1-13. [PMID: 36780841 PMCID: PMC10121874 DOI: 10.1016/j.euroneuro.2023.01.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 01/17/2023] [Accepted: 01/24/2023] [Indexed: 02/13/2023]
Abstract
We examined relationships between the serotonin system and stress in major depression and suicidal behavior. Twenty-five medication-free depressed participants (13 suicide attempters) underwent same-day [11C]DASB and [11C]CUMI-101 positron emission tomography (PET) imaging. Binding potential (BPND) to the serotonin transporter (5-HTT) and serotonin 1A (5-HT1A) receptor, respectively, was quantified using the NRU 5-HT atlas, reflecting distinct spatial distributions of multiple serotonin targets. Ecological momentary assessment (EMA) measured current stress over one week proximal to imaging. EMA stress did not differ between attempters and non-attempters. In all depressed participants, 5-HTT and 5-HT1A BPND were unrelated to EMA stress. There were region-specific effects of 5-HTT (p=0.002) and 5-HT1A BPND (p=0.03) in attempters vs. nonattempters. In attempters, region-specific associations between 5-HTT (p=0.03) and 5-HT1A (p=0.005) BPND and EMA stress emerged. While no post-hoc 5-HTT BPND correlations were significant, 5-HT1A BPND correlated positively with EMA stress in attempters in 9/10 regions (p-values<0.007), including the entire cortex except the largely occipital region 5. Brodmann-based regional analyses found diminished effects for 5-HTT and subcortically localized positive corrrelations between 5-HT1A and EMA stress, in attempters only. Given comparable depression severity and childhood and current stress between attempters and nonattempters, lower 5-HTT binding in attempters vs. nonattempters may suggest a biological risk marker. Localized lower 5-HTT and widespread higher 5-HT1A binding with stress among attempters specifically may suggest that a serotonergic phenotype might be a key determinant of risk or resiliency for suicidal behavior.
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Affiliation(s)
- Elizabeth A Bartlett
- Molecular Imaging and Neuropathology Area, New York State Psychiatric Institute, New York, USA; Department of Psychiatry, Columbia University Irving Medical Center, New York, USA.
| | - Francesca Zanderigo
- Molecular Imaging and Neuropathology Area, New York State Psychiatric Institute, New York, USA; Department of Psychiatry, Columbia University Irving Medical Center, New York, USA
| | - Barbara Stanley
- Molecular Imaging and Neuropathology Area, New York State Psychiatric Institute, New York, USA; Department of Psychiatry, Columbia University Irving Medical Center, New York, USA
| | - Tse-Hwei Choo
- Molecular Imaging and Neuropathology Area, New York State Psychiatric Institute, New York, USA; Department of Psychiatry, Columbia University Irving Medical Center, New York, USA
| | - Hanga C Galfalvy
- Molecular Imaging and Neuropathology Area, New York State Psychiatric Institute, New York, USA; Department of Psychiatry, Columbia University Irving Medical Center, New York, USA
| | - Spiro P Pantazatos
- Molecular Imaging and Neuropathology Area, New York State Psychiatric Institute, New York, USA; Department of Psychiatry, Columbia University Irving Medical Center, New York, USA
| | - M Elizabeth Sublette
- Molecular Imaging and Neuropathology Area, New York State Psychiatric Institute, New York, USA; Department of Psychiatry, Columbia University Irving Medical Center, New York, USA
| | - Jeffrey M Miller
- Molecular Imaging and Neuropathology Area, New York State Psychiatric Institute, New York, USA; Department of Psychiatry, Columbia University Irving Medical Center, New York, USA
| | - Maria A Oquendo
- Department of Psychiatry, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - J John Mann
- Molecular Imaging and Neuropathology Area, New York State Psychiatric Institute, New York, USA; Department of Psychiatry, Columbia University Irving Medical Center, New York, USA; Department of Radiology, Columbia University Irving Medical Center, New York, USA
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6
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Xiu Z, Muzi M, Huang J, Wolsztynski E. Patient-Adaptive Population-Based Modeling of Arterial Input Functions. IEEE TRANSACTIONS ON MEDICAL IMAGING 2023; 42:132-147. [PMID: 36094987 PMCID: PMC10008518 DOI: 10.1109/tmi.2022.3205940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Kinetic modeling of dynamic PET data requires knowledge of tracer concentration in blood plasma, described by the arterial input function (AIF). Arterial blood sampling is the gold standard for AIF measurement, but is invasive and labour intensive. A number of methods have been proposed to accurately estimate the AIF directly from blood sampling and/or imaging data. Here we consider fitting a patient-adaptive mixture of historical population time course profiles to estimate individual AIFs. Travel time of a tracer atom from the injection site to the right ventricle of the heart is modeled as a realization from a Gamma distribution, and the time this atom spends in circulation before being sampled is represented by a subject-specific linear mixture of population profiles. These functions are estimated from independent population data. Individual AIFs are obtained by projection onto this basis of population profile components. The model incorporates knowledge of injection duration into the fit, allowing for varying injection protocols. Analyses of arterial sampling data from 18F-FDG, 15O-H2O and 18F-FLT clinical studies show that the proposed model can outperform reference techniques. The statistically significant gain achieved by using population data to train the basis components, instead of fitting these from the single individual sampling data, is measured on the FDG cohort. Kinetic analyses of simulated data demonstrate the reliability and potential benefit of this approach in estimating physiological parameters. These results are further supported by numerical simulations that demonstrate convergence and stability of the proposed technique under varying training population sizes and noise levels.
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7
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Pantazatos SP, Melhem NM, Brent DA, Zanderigo F, Bartlett EA, Lesanpezeshki M, Burke A, Miller JM, Mann JJ. Ventral prefrontal serotonin 1A receptor binding: a neural marker of vulnerability for mood disorder and suicidal behavior? Mol Psychiatry 2022; 27:4136-4143. [PMID: 35760877 PMCID: PMC9722608 DOI: 10.1038/s41380-022-01671-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Revised: 06/01/2022] [Accepted: 06/10/2022] [Indexed: 02/07/2023]
Abstract
Mood disorders and suicidal behavior have moderate heritability and are associated with altered corticolimbic serotonin 1A receptor (5-HT1A) brain binding. However, it is unclear whether this reflects genetic effects or epigenetic effects of childhood adversity, compensatory mechanisms, or illness stress-related changes. We sought to separate such effects on 5-HT1A binding by examining high familial risk individuals (HR) who have passed through the age of greatest risk for psychopathology onset with and without developing mood disorder or suicidal behavior. PET imaging quantified 5-HT1A binding potential BPND using [11C]CUMI-101 in healthy volunteers (HV, N = 23) and three groups with one or more relatives manifesting early-onset mood disorder and suicide attempt: 1. unaffected HR (N = 23); 2. HR with lifetime mood disorder and no suicide attempt (HR-MOOD, N = 26); and 3. HR-MOOD with previous suicide attempt (HR-MOOD + SA, N = 20). Findings were tested in an independent cohort not selected for family history (HV, MOOD, and MOOD + SA, total N = 185). We tested for regional BPND differences and whether brain-wide patterns distinguished between groups. Low ventral prefrontal 5-HT1A BPND was associated with lifetime mood disorder diagnosis and suicide attempt, but only in subjects with a family history of mood disorder and suicide attempt. Brain-wide 5-HT1A BPND patterns including low ventral prefrontal and mesiotemporal cortical binding distinguished HR-MOOD + SA from HV. A biological endophenotype associated with resilience was not observed. Low ventral prefrontal 5-HT1A BPND may reflect familial mood disorder and suicide-related pathology. Further studies are needed to determine if higher ventral prefrontal 5-HT1A BPND confers resilience, reducing risk of suicidal behavior in the context of familial risk, and thereby offer a potential prevention target.
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Affiliation(s)
- Spiro P Pantazatos
- Molecular Imaging and Neuropathology Area, New York State Psychiatric Institute, New York, NY, USA.
- Department of Psychiatry, Columbia University Irving Medical Center, New York, NY, USA.
| | - Nadine M Melhem
- Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - David A Brent
- Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
- UPMC Western Psychiatric Hospital, Pittsburgh, PA, USA
| | - Francesca Zanderigo
- Molecular Imaging and Neuropathology Area, New York State Psychiatric Institute, New York, NY, USA
- Department of Psychiatry, Columbia University Irving Medical Center, New York, NY, USA
| | - Elizabeth A Bartlett
- Molecular Imaging and Neuropathology Area, New York State Psychiatric Institute, New York, NY, USA
- Department of Psychiatry, Columbia University Irving Medical Center, New York, NY, USA
| | - Mohammad Lesanpezeshki
- Molecular Imaging and Neuropathology Area, New York State Psychiatric Institute, New York, NY, USA
- Department of Psychiatry, Columbia University Irving Medical Center, New York, NY, USA
| | - Ainsley Burke
- Molecular Imaging and Neuropathology Area, New York State Psychiatric Institute, New York, NY, USA
- Department of Psychiatry, Columbia University Irving Medical Center, New York, NY, USA
| | - Jeffrey M Miller
- Molecular Imaging and Neuropathology Area, New York State Psychiatric Institute, New York, NY, USA
- Department of Psychiatry, Columbia University Irving Medical Center, New York, NY, USA
| | - J John Mann
- Molecular Imaging and Neuropathology Area, New York State Psychiatric Institute, New York, NY, USA.
- Department of Psychiatry, Columbia University Irving Medical Center, New York, NY, USA.
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8
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Tuncel H, Boellaard R, Coomans EM, Hollander-Meeuwsen MD, de Vries EFJ, Glaudemans AWJM, Feltes PK, García DV, Verfaillie SCJ, Wolters EE, Sweeney SP, Ryan JM, Ivarsson M, Lynch BA, Schober P, Scheltens P, Schuit RC, Windhorst AD, De Deyn PP, van Berckel BNM, Golla SSV. Validation and test–retest repeatability performance of parametric methods for [11C]UCB-J PET. EJNMMI Res 2022; 12:3. [PMID: 35072802 PMCID: PMC8786991 DOI: 10.1186/s13550-021-00874-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Accepted: 12/24/2021] [Indexed: 12/02/2022] Open
Abstract
[11C]UCB-J is a PET radioligand that binds to the presynaptic vesicle glycoprotein 2A. Therefore, [11C]UCB-J PET may serve as an in vivo marker of synaptic integrity. The main objective of this study was to evaluate the quantitative accuracy and the 28-day test–retest repeatability (TRT) of various parametric quantitative methods for dynamic [11C]UCB-J studies in Alzheimer’s disease (AD) patients and healthy controls (HC). Eight HCs and seven AD patients underwent two 60-min dynamic [11C]UCB-J PET scans with arterial sampling over a 28-day interval. Several plasma-input based and reference-region based parametric methods were used to generate parametric images using metabolite corrected plasma activity as input function or white matter semi-ovale as reference region. Different parametric outcomes were compared regionally with corresponding non-linear regression (NLR) estimates. Furthermore, the 28-day TRT was assessed for all parametric methods. Spectral analysis (SA) and Logan graphical analysis showed high correlations with NLR estimates. Receptor parametric mapping (RPM) and simplified reference tissue model 2 (SRTM2) BPND, and reference Logan (RLogan) distribution volume ratio (DVR) regional estimates correlated well with plasma-input derived DVR and SRTM BPND. Among the multilinear reference tissue model (MRTM) methods, MRTM1 had the best correspondence with DVR and SRTM BPND. Among the parametric methods evaluated, spectral analysis (SA) and SRTM2 were the best plasma-input and reference tissue methods, respectively, to obtain quantitatively accurate and repeatable parametric images for dynamic [11C]UCB-J PET.
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9
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Veronese M, Rizzo G, Belzunce M, Schubert J, Searle G, Whittington A, Mansur A, Dunn J, Reader A, Gunn RN. Reproducibility of findings in modern PET neuroimaging: insight from the NRM2018 grand challenge. J Cereb Blood Flow Metab 2021; 41:2778-2796. [PMID: 33993794 PMCID: PMC8504414 DOI: 10.1177/0271678x211015101] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 03/10/2021] [Accepted: 04/03/2021] [Indexed: 11/16/2022]
Abstract
The reproducibility of findings is a compelling methodological problem that the neuroimaging community is facing these days. The lack of standardized pipelines for image processing, quantification and statistics plays a major role in the variability and interpretation of results, even when the same data are analysed. This problem is well-known in MRI studies, where the indisputable value of the method has been complicated by a number of studies that produce discrepant results. However, any research domain with complex data and flexible analytical procedures can experience a similar lack of reproducibility. In this paper we investigate this issue for brain PET imaging. During the 2018 NeuroReceptor Mapping conference, the brain PET community was challenged with a computational contest involving a simulated neurotransmitter release experiment. Fourteen international teams analysed the same imaging dataset, for which the ground-truth was known. Despite a plurality of methods, the solutions were consistent across participants, although not identical. These results should create awareness that the increased sharing of PET data alone will only be one component of enhancing confidence in neuroimaging results and that it will be important to complement this with full details of the analysis pipelines and procedures that have been used to quantify data.
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Affiliation(s)
- Mattia Veronese
- Centre for Neuroimaging Sciences, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, UK
| | | | - Martin Belzunce
- School of Biomedical Engineering and Imaging Sciences, St Thomas’ Hospital, King’s College London, London, UK
| | - Julia Schubert
- Centre for Neuroimaging Sciences, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, UK
| | | | | | - Ayla Mansur
- Invicro LLC, London, UK
- Department of Brain Sciences, Imperial College London, London, UK
| | - Joel Dunn
- School of Biomedical Engineering and Imaging Sciences, St Thomas’ Hospital, King’s College London, London, UK
- King's College London & Guy's and St. Thomas' PET Centre, London, UK
| | - Andrew Reader
- School of Biomedical Engineering and Imaging Sciences, St Thomas’ Hospital, King’s College London, London, UK
| | - Roger N Gunn
- Invicro LLC, London, UK
- Department of Brain Sciences, Imperial College London, London, UK
| | - and the Grand Challenge Participants#
- Centre for Neuroimaging Sciences, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, UK
- Invicro LLC, London, UK
- School of Biomedical Engineering and Imaging Sciences, St Thomas’ Hospital, King’s College London, London, UK
- Department of Brain Sciences, Imperial College London, London, UK
- King's College London & Guy's and St. Thomas' PET Centre, London, UK
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10
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Melhem NM, Zhong Y, Miller JM, Zanderigo F, Ogden RT, Sublette ME, Newell M, Burke A, Keilp JG, Lesanpezeshki M, Bartlett E, Brent DA, Mann JJ. Brain 5-HT1A Receptor PET Binding, Cortisol Responses to Stress, and the Familial Transmission of Suicidal Behavior. Int J Neuropsychopharmacol 2021; 25:36-45. [PMID: 34555145 PMCID: PMC8756092 DOI: 10.1093/ijnp/pyab060] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 07/22/2021] [Accepted: 10/04/2021] [Indexed: 01/19/2023] Open
Abstract
BACKGROUND The serotonin 1A (5-HT1A) receptor has been implicated in depression and suicidal behavior. Lower resting cortisol levels are associated with higher 5-HT1A receptor binding, and both differentiate suicide attempters with depression. However, it is not clear whether 5-HT1A receptor binding and cortisol responses to stress are related to familial risk and resilience for suicidal behavior. METHODS [11C]CUMI-101 positron emission tomography imaging to quantify regional brain 5-HT1A receptor binding was conducted in individuals considered to be at high risk for mood disorder or suicidal behavior on the basis of having a first- or second-degree relative(s) with an early onset mood disorder and history of suicidal behavior. These high-risk individuals were subdivided into the following groups: high risk resilient having no mood disorder or suicidal behavior (n = 29); high risk with mood disorder and no suicidal behavior history (n = 31); and high risk with mood disorder and suicidal behavior (n = 25). Groups were compared with healthy volunteers without a family history of mood disorder or suicidal behavior (n = 34). Participants underwent the Trier Social Stress Task (TSST). All participants were free from psychotropic medications at the time of the TSST and PET scanning. RESULTS We observed no group differences in 5-HT1A receptor binding considering all regions simultaneously, nor did we observe heterogeneity of the effect of group across regions. These results were similar across outcome measures (BPND for all participants and BPp in a subset of the sample) and definitions of regions of interest (ROIs; standard or serotonin system-specific ROIs). We also found no group differences on TSST outcomes. Within the high risk with mood disorder and suicidal behavior group, lower BPp binding (β = -0.084, SE = 0.038, P = .048) and higher cortisol reactivity to stress (β = 9.25, 95% CI [3.27,15.23], P = .004) were associated with higher lethality attempts. There were no significant relationships between 5-HT1A binding and cortisol outcomes. CONCLUSIONS 5-HT1A receptor binding in ROIs was not linked to familial risk or resilience protecting against suicidal behavior or mood disorder although it may be related to lethality of suicide attempt. Future studies are needed to better understand the biological mechanisms implicated in familial risk for suicidal behavior and how hypothalamic-pituitary-adrenal axis function influences such risk.
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Affiliation(s)
- Nadine M Melhem
- Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States
- Correspondence: Nadine Melhem, PhD, 3811 O’Hara Street, Pittsburgh, PA 15213, USA ()
| | - Yongqi Zhong
- Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States
- Graduate School of Public Health, University of Pittsburgh
| | - Jeffrey M Miller
- Molecular Imaging and Neuropathology Area, New York State Psychiatric Institute, New York, New York, United States
- Department of Psychiatry, Columbia University, New York, New York, United States
| | - Francesca Zanderigo
- Molecular Imaging and Neuropathology Area, New York State Psychiatric Institute, New York, New York, United States
- Department of Psychiatry, Columbia University, New York, New York, United States
| | - R Todd Ogden
- Molecular Imaging and Neuropathology Area, New York State Psychiatric Institute, New York, New York, United States
- Department of Biostatistics, Mailman School of Public Health, Columbia University, New York, New York, United States
| | - M Elizabeth Sublette
- Molecular Imaging and Neuropathology Area, New York State Psychiatric Institute, New York, New York, United States
- Department of Psychiatry, Columbia University, New York, New York, United States
| | - Madison Newell
- Molecular Imaging and Neuropathology Area, New York State Psychiatric Institute, New York, New York, United States
| | - Ainsley Burke
- Molecular Imaging and Neuropathology Area, New York State Psychiatric Institute, New York, New York, United States
- Department of Psychiatry, Columbia University, New York, New York, United States
| | - John G Keilp
- Molecular Imaging and Neuropathology Area, New York State Psychiatric Institute, New York, New York, United States
- Department of Psychiatry, Columbia University, New York, New York, United States
| | - Mohammad Lesanpezeshki
- Molecular Imaging and Neuropathology Area, New York State Psychiatric Institute, New York, New York, United States
- Department of Psychiatry, Columbia University, New York, New York, United States
| | - Elizabeth Bartlett
- Molecular Imaging and Neuropathology Area, New York State Psychiatric Institute, New York, New York, United States
- Department of Psychiatry, Columbia University, New York, New York, United States
| | - David A Brent
- Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States
| | - J John Mann
- Molecular Imaging and Neuropathology Area, New York State Psychiatric Institute, New York, New York, United States
- Department of Psychiatry, Columbia University, New York, New York, United States
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11
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de Vries BM, Timmers T, Wolters EE, Ossenkoppele R, Verfaillie SCJ, Schuit RC, Scheltens P, van der Flier WM, Windhorst AD, van Berckel BNM, Boellaard R, Golla SSV. Non-invasive Standardised Uptake Value for Verification of the Use of Previously Validated Reference Region for [ 18F]Flortaucipir and [ 18F]Florbetapir Brain PET Studies. Mol Imaging Biol 2021; 23:550-559. [PMID: 33443720 PMCID: PMC8277631 DOI: 10.1007/s11307-020-01572-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 11/20/2020] [Accepted: 12/16/2020] [Indexed: 11/24/2022]
Abstract
Purpose The simplified reference tissue model (SRTM) is commonly applied for the quantification of brain positron emission tomography (PET) studies, particularly because it avoids arterial cannulation. SRTM requires a validated reference region which is obtained by baseline-blocking or displacement studies. Once a reference region is validated, the use should be verified for each new subject. This verification normally requires volume of distribution (VT) of a reference region. However, performing dynamic scanning and arterial sampling is not always possible, specifically in elderly subjects and in advanced disease stages. The aim of this study was to investigate the use of non-invasive standardised uptake value (SUV) approaches, in comparison to VT, as a verification of the previously validated grey matter cerebellum reference region for [18F]flortaucipir and [18F]florbetapir PET imaging in Alzheimer’s disease (AD) patients and controls. Procedures Dynamic 130-min [18F]flortaucipir PET scans obtained from nineteen subjects (10 AD patients) and 90-min [18F]florbetapir dynamic scans obtained from fourteen subjects (8 AD patients) were included. Regional VT’s were estimated for both tracers and were considered the standard verification of the previously validated reference region. Non-invasive SUVs corrected for body weight (SUVBW), lean body mass (SUL), and body surface area (SUVBSA) were obtained by using later time intervals of the dynamic scans. Simulations were also performed to assess the effect of flow and specific binding (BPND) on the SUVs. Results A low SUV corresponded well with a low VT for both [18F]flortaucipir and [18F]florbetapir. Simulation confirmed that SUVs were only slightly affected by flow changes and that increases in SUV were predominantly determined by the presence of specific binding. Conclusions In situations where dynamic scanning and arterial sampling is not possible, a low SUV(80–100 min) for [18F]flortaucipir and a low SUV(50–70 min) for [18F]florbetapir may be used as indication for absence of specific binding in the grey matter cerebellum reference region. Supplementary Information The online version contains supplementary material available at 10.1007/s11307-020-01572-y.
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Affiliation(s)
- Bart M de Vries
- Radiology and Nuclear Medicine, Amsterdam UMC, Vrije Universiteit Amsterdam, De Boelelaan 1117, Amsterdam, The Netherlands
| | - Tessa Timmers
- Radiology and Nuclear Medicine, Amsterdam UMC, Vrije Universiteit Amsterdam, De Boelelaan 1117, Amsterdam, The Netherlands.,Alzheimer Center and Department of Neurology, Amsterdam UMC, Vrije Universiteit Amsterdam, De Boelelaan 1117, Amsterdam, The Netherlands
| | - Emma E Wolters
- Radiology and Nuclear Medicine, Amsterdam UMC, Vrije Universiteit Amsterdam, De Boelelaan 1117, Amsterdam, The Netherlands.,Alzheimer Center and Department of Neurology, Amsterdam UMC, Vrije Universiteit Amsterdam, De Boelelaan 1117, Amsterdam, The Netherlands
| | - Rik Ossenkoppele
- Radiology and Nuclear Medicine, Amsterdam UMC, Vrije Universiteit Amsterdam, De Boelelaan 1117, Amsterdam, The Netherlands.,Alzheimer Center and Department of Neurology, Amsterdam UMC, Vrije Universiteit Amsterdam, De Boelelaan 1117, Amsterdam, The Netherlands
| | - Sander C J Verfaillie
- Alzheimer Center and Department of Neurology, Amsterdam UMC, Vrije Universiteit Amsterdam, De Boelelaan 1117, Amsterdam, The Netherlands
| | - Robert C Schuit
- Radiology and Nuclear Medicine, Amsterdam UMC, Vrije Universiteit Amsterdam, De Boelelaan 1117, Amsterdam, The Netherlands
| | - Philip Scheltens
- Alzheimer Center and Department of Neurology, Amsterdam UMC, Vrije Universiteit Amsterdam, De Boelelaan 1117, Amsterdam, The Netherlands
| | - Wiesje M van der Flier
- Alzheimer Center and Department of Neurology, Amsterdam UMC, Vrije Universiteit Amsterdam, De Boelelaan 1117, Amsterdam, The Netherlands.,Epidemiology & Biostatistics, Amsterdam UMC, Vrije Universiteit Amsterdam, De Boelelaan 1117, Amsterdam, The Netherlands
| | - Albert D Windhorst
- Radiology and Nuclear Medicine, Amsterdam UMC, Vrije Universiteit Amsterdam, De Boelelaan 1117, Amsterdam, The Netherlands
| | - Bart N M van Berckel
- Radiology and Nuclear Medicine, Amsterdam UMC, Vrije Universiteit Amsterdam, De Boelelaan 1117, Amsterdam, The Netherlands.,Alzheimer Center and Department of Neurology, Amsterdam UMC, Vrije Universiteit Amsterdam, De Boelelaan 1117, Amsterdam, The Netherlands
| | - Ronald Boellaard
- Radiology and Nuclear Medicine, Amsterdam UMC, Vrije Universiteit Amsterdam, De Boelelaan 1117, Amsterdam, The Netherlands
| | - Sandeep S V Golla
- Radiology and Nuclear Medicine, Amsterdam UMC, Vrije Universiteit Amsterdam, De Boelelaan 1117, Amsterdam, The Netherlands.
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12
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Serrano ME, Bahri MA, Becker G, Seret A, Mievis F, Giacomelli F, Lemaire C, Salmon E, Luxen A, Plenevaux A. Quantification of [ 18F]UCB-H Binding in the Rat Brain: From Kinetic Modelling to Standardised Uptake Value. Mol Imaging Biol 2020; 21:888-897. [PMID: 30460626 DOI: 10.1007/s11307-018-1301-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
PURPOSE [18F]UCB-H is a specific positron emission tomography (PET) biomarker for the Synaptic Vesicle protein 2A (SV2A), the binding site of the antiepileptic drug levetiracetam. With a view to optimising acquisition time and simplifying data analysis with this radiotracer, we compared two parameters: the distribution volume (Vt) obtained from Logan graphical analysis using a Population-Based Input Function, and the Standardised Uptake Value (SUV). PROCEDURES Twelve Sprague Dawley male rats, pre-treated with three different doses of levetiracetam were employed to develop the methodology. Three additional kainic acid (KA) treated rats (temporal lobe epilepsy model) were also used to test the procedure. Image analyses focused on: (i) length of the dynamic acquisition (90 versus 60 min); (ii) correlations between Vt and SUV over 20-min consecutive time-frames; (iii) and (iv) evaluation of differences between groups using the Vt and the SUV; and (v) preliminary evaluation of the methodology in the KA epilepsy model. RESULTS A large correlation between the Vt issued from 60 to 90-min acquisitions was observed. Further analyses highlighted a large correlation (r > 0.8) between the Vt and the SUV. Equivalent differences between groups were detected for both parameters, especially in the 20-40 and 40-60-min time-frames. The same results were also obtained with the epilepsy model. CONCLUSIONS Our results enable the acquisition setting to be changed from a 90-min dynamic to a 20-min static PET acquisition. According to a better image quality, the 20-40-min time-frame appears optimal. Due to its equivalence to the Vt, the SUV parameter can be considered in order to quantify [18F]UCB-H uptake in the rat brain. This work, therefore, establishes a starting point for the simplification of SV2A in vivo quantification with [18F]UCB-H, and represents a step forward to the clinical application of this PET radiotracer.
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Affiliation(s)
- Maria Elisa Serrano
- GIGA - CRC In Vivo Imaging, University of Liège, Allée du 6 Août, Building B30, Sart Tilman, 4000, Liège, Belgium.
| | - Mohamed Ali Bahri
- GIGA - CRC In Vivo Imaging, University of Liège, Allée du 6 Août, Building B30, Sart Tilman, 4000, Liège, Belgium
| | - Guillaume Becker
- GIGA - CRC In Vivo Imaging, University of Liège, Allée du 6 Août, Building B30, Sart Tilman, 4000, Liège, Belgium
| | - Alain Seret
- GIGA - CRC In Vivo Imaging, University of Liège, Allée du 6 Août, Building B30, Sart Tilman, 4000, Liège, Belgium
| | - Frédéric Mievis
- Nucleis, University of Liège, Allée du 6 Août, Building B30, Sart Tilman, 4000, Liège, Belgium
| | - Fabrice Giacomelli
- Nucleis, University of Liège, Allée du 6 Août, Building B30, Sart Tilman, 4000, Liège, Belgium
| | - Christian Lemaire
- GIGA - CRC In Vivo Imaging, University of Liège, Allée du 6 Août, Building B30, Sart Tilman, 4000, Liège, Belgium
| | - Eric Salmon
- GIGA - CRC In Vivo Imaging, University of Liège, Allée du 6 Août, Building B30, Sart Tilman, 4000, Liège, Belgium
| | - André Luxen
- GIGA - CRC In Vivo Imaging, University of Liège, Allée du 6 Août, Building B30, Sart Tilman, 4000, Liège, Belgium
| | - Alain Plenevaux
- GIGA - CRC In Vivo Imaging, University of Liège, Allée du 6 Août, Building B30, Sart Tilman, 4000, Liège, Belgium
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13
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Probing the association between serotonin-1A autoreceptor binding and amygdala reactivity in healthy volunteers. Neuroimage 2018; 171:1-5. [DOI: 10.1016/j.neuroimage.2017.12.092] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Revised: 12/19/2017] [Accepted: 12/28/2017] [Indexed: 11/22/2022] Open
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14
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Bertelsen F, Landau AM, Vase KH, Jacobsen J, Scheel-Krüger J, Møller A. Acute in vivo effect of valproic acid on the GABAergic system in rat brain: A [ 11C]Ro15-4513 microPET study. Brain Res 2017; 1680:110-114. [PMID: 29258847 DOI: 10.1016/j.brainres.2017.12.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 12/08/2017] [Accepted: 12/13/2017] [Indexed: 02/05/2023]
Abstract
γ-Aminobutyric acid (GABA) is the primary inhibitory neurotransmitter in the nervous system acting mainly through GABAA receptors. In the presence of high levels of GABA, an allosteric shift in the GABAA receptors can change the affinity of benzodiazepine (BZD) ligands. Valproic acid (VPA) is an anticonvulsant that enhances the level of endogenous GABA in the brain. The BZD ligand, Ro15-4513 has a high affinity for GABAA receptors containing the α5 subunit and can be used to investigate the GABA shift in the brains of living rats after VPA exposure. Seven Wistar rats were scanned using a Mediso NanoScan PET/MRI. A baseline 90-min dynamic [11C]Ro15-4513 PET scan was acquired prior to an intravenous injection of 50 mg/kg VPA, and was followed by a second [11C]Ro15-4513 PET scan. Standardized uptake values were obtained for regions of high GABA binding, including the hippocampus and amygdala, and low GABA binding such as the cerebellum. We showed a significant increase in [11C]Ro15-4513 uptake in hippocampus and amygdala, but no significant differences in cerebellar uptake, after acute VPA exposure. In contrast to several in vitro studies, we demonstrated a positive allosteric change in the GABAA receptors after pharmacologically enhanced GABA levels resulting in enhanced Ro15-4513 uptake. Knowledge of how subtypes of the GABAA receptors react will provide us with information useful to fine-tune pharmacological interventions and design receptor subtype specific drugs.
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Affiliation(s)
- Freja Bertelsen
- Centre of Functionally Integrative Neuroscience, Aarhus University, Nørrebrogade 44, Building 10G, 8000 Aarhus, Denmark; Department of Nuclear Medicine and PET Centre, Aarhus University Hospital, Nørrebrogade 44, Building 10G, 8000 Aarhus, Denmark.
| | - Anne M Landau
- Department of Nuclear Medicine and PET Centre, Aarhus University Hospital, Nørrebrogade 44, Building 10G, 8000 Aarhus, Denmark; Translational Neuropsychiatry Unit, Aarhus University, Skovagervej 2, Building 14J.1, 8240 Risskov, Denmark.
| | - Karina H Vase
- Department of Nuclear Medicine and PET Centre, Aarhus University Hospital, Nørrebrogade 44, Building 10G, 8000 Aarhus, Denmark.
| | - Jan Jacobsen
- Department of Nuclear Medicine and PET Centre, Aarhus University Hospital, Nørrebrogade 44, Building 10G, 8000 Aarhus, Denmark.
| | - Jørgen Scheel-Krüger
- Centre of Functionally Integrative Neuroscience, Aarhus University, Nørrebrogade 44, Building 10G, 8000 Aarhus, Denmark.
| | - Arne Møller
- Centre of Functionally Integrative Neuroscience, Aarhus University, Nørrebrogade 44, Building 10G, 8000 Aarhus, Denmark; Department of Nuclear Medicine and PET Centre, Aarhus University Hospital, Nørrebrogade 44, Building 10G, 8000 Aarhus, Denmark.
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15
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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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16
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Schain M, Zanderigo F, Mann J, Ogden R. Estimation of the binding potential BPND without a reference region or blood samples for brain PET studies. Neuroimage 2017; 146:121-131. [PMID: 27856316 DOI: 10.1016/j.neuroimage.2016.11.035] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Accepted: 11/13/2016] [Indexed: 02/02/2023] Open
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17
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Yang KC, Stepanov V, Amini N, Martinsson S, Takano A, Nielsen J, Bundgaard C, Bang-Andersen B, Grimwood S, Halldin C, Farde L, Finnema SJ. Characterization of [ 11C]Lu AE92686 as a PET radioligand for phosphodiesterase 10A in the nonhuman primate brain. Eur J Nucl Med Mol Imaging 2016; 44:308-320. [PMID: 27817159 PMCID: PMC5215309 DOI: 10.1007/s00259-016-3544-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Accepted: 10/03/2016] [Indexed: 11/28/2022]
Abstract
Purpose [11C]Lu AE92686 is a positron emission tomography (PET) radioligand that has recently been validated for examining phosphodiesterase 10A (PDE10A) in the human striatum. [11C]Lu AE92686 has high affinity for PDE10A (IC50 = 0.39 nM) and may also be suitable for examination of the substantia nigra, a region with low density of PDE10A. Here, we report characterization of regional [11C]Lu AE92686 binding to PDE10A in the nonhuman primate (NHP) brain. Methods A total of 11 PET measurements, seven baseline and four following pretreatment with unlabeled Lu AE92686 or the structurally unrelated PDE10A inhibitor MP-10, were performed in five NHPs using a high resolution research tomograph (HRRT). [11C]Lu AE92686 binding was quantified using a radiometabolite-corrected arterial input function and compartmental and graphical modeling approaches. Results Regional time-activity curves were best described with the two-tissue compartment model (2TCM). However, the distribution volume (VT) values for all regions were obtained by the Logan plot analysis, as reliable cerebellar VT values could not be derived by the 2TCM. For cerebellum, a proposed reference region, VT values increased by ∼30 % with increasing PET measurement duration from 63 to 123 min, while VT values in target regions remained stable. Both pretreatment drugs significantly decreased [11C]Lu AE92686 binding in target regions, while no significant effect on cerebellum was observed. Binding potential (BPND) values, derived with the simplified reference tissue model (SRTM), were 13–17 in putamen and 3–5 in substantia nigra and correlated well to values from the Logan plot analysis. Conclusions The method proposed for quantification of [11C]Lu AE92686 binding in applied studies in NHP is based on 63 min PET data and SRTM with cerebellum as a reference region. The study supports that [11C]Lu AE92686 can be used for PET examinations of PDE10A binding also in substantia nigra. Electronic supplementary material The online version of this article (doi:10.1007/s00259-016-3544-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Kai-Chun Yang
- Department of Clinical Neuroscience, Center for Psychiatric Research, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden.
| | - Vladimir Stepanov
- Department of Clinical Neuroscience, Center for Psychiatric Research, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Nahid Amini
- Department of Clinical Neuroscience, Center for Psychiatric Research, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Stefan Martinsson
- Department of Clinical Neuroscience, Center for Psychiatric Research, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Akihiro Takano
- Department of Clinical Neuroscience, Center for Psychiatric Research, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Jacob Nielsen
- Synaptic Transmission, H. Lundbeck A/S, Valby, Denmark
| | | | | | - Sarah Grimwood
- Neuroscience and Pain Research Unit, Pfizer Inc., Cambridge, MA, USA
| | - Christer Halldin
- Department of Clinical Neuroscience, Center for Psychiatric Research, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Lars Farde
- Department of Clinical Neuroscience, Center for Psychiatric Research, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden.,Personalized Health Care and Biomarkers, AstraZeneca PET Science Center at Karolinska Institutet, Stockholm, Sweden
| | - Sjoerd J Finnema
- Department of Clinical Neuroscience, Center for Psychiatric Research, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden.,Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT, USA
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18
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Comparative assessment of parametric neuroreceptor mapping approaches based on the simplified reference tissue model using [¹¹C]ABP688 PET. J Cereb Blood Flow Metab 2015; 35:2098-108. [PMID: 26243707 PMCID: PMC4671133 DOI: 10.1038/jcbfm.2015.190] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Revised: 06/17/2015] [Accepted: 07/02/2015] [Indexed: 11/08/2022]
Abstract
In recent years, several linearized model approaches for fast and reliable parametric neuroreceptor mapping based on dynamic nuclear imaging have been developed from the simplified reference tissue model (SRTM) equation. All the methods share the basic SRTM assumptions, but use different schemes to alleviate the effect of noise in dynamic-image voxels. Thus, this study aimed to compare those approaches in terms of their performance in parametric image generation. We used the basis function method and MRTM2 (multilinear reference tissue model with two parameters), which require a division process to obtain the distribution volume ratio (DVR). In addition, a linear model with the DVR as a model parameter (multilinear SRTM) was used in two forms: one based on linear least squares and the other based on extension of total least squares (TLS). Assessment using simulated and actual dynamic [(11)C]ABP688 positron emission tomography data revealed their equivalence with the SRTM, except for different noise susceptibilities. In the DVR image production, the two multilinear SRTM approaches achieved better image quality and regional compatibility with the SRTM than the others, with slightly better performance in the TLS-based method.
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19
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FDG-PET Contributions to the Pathophysiology of Memory Impairment. Neuropsychol Rev 2015; 25:326-55. [PMID: 26319237 DOI: 10.1007/s11065-015-9297-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Accepted: 08/04/2015] [Indexed: 10/23/2022]
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20
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Liu H, Jin H, Yue X, Zhang X, Yang H, Li J, Flores H, Su Y, Perlmutter JS, Tu Z. Preclinical evaluation of a promising C-11 labeled PET tracer for imaging phosphodiesterase 10A in the brain of living subject. Neuroimage 2015. [PMID: 26216275 DOI: 10.1016/j.neuroimage.2015.07.049] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
Phosphodiesterase 10A (PDE10A) plays a key role in the regulation of brain striatal signaling. A PET tracer for PDE10A may serve as a tool to evaluate PDE10A expression in vivo in central nervous system disorders with striatal pathology. Here, we further characterized the binding properties of a previously reported radioligand we developed for PDE10A, [(11)C]TZ1964B, in rodents and nonhuman primates (NHPs). The tritiated counterpart [(3)H]TZ1964B was used for in vitro binding characterizations in rat striatum homogenates and in vitro autoradiographic studies in rat brain slices. The carbon-11 labeled [(11)C]TZ1964B was utilized in the ex vivo autoradiography studies for the brain of rats and microPET imaging studies for the brain of NHPs. MicroPET scans of [(11)C]TZ1964B in NHPs were conducted at baseline, as well as with using a selective PDE10A inhibitor MP-10 for either pretreatment or displacement. The in vivo regional target occupancy (Occ) was obtained by pretreating with different doses of MP-10 (0.05-2.00 mg/kg). Both in vitro binding assays and in vitro autoradiographic studies revealed a nanomolar binding affinity of [(3)H]TZ1964B to the rat striatum. The striatal binding of [(3)H]TZ1964B and [(11)C]TZ1964B was either displaced or blocked by MP-10 in rats and NHPs. Autoradiography and microPET imaging confirmed that the specific binding of the radioligand was found in the striatum but not in the cerebellum. Blocking studies also confirmed the suitability of the cerebellum as an appropriate reference region. The binding potentials (BPND) of [(11)C]TZ1964B in the NHP striatum that were calculated using either the Logan reference model (LoganREF, 3.96 ± 0.17) or the simplified reference tissue model (SRTM, 4.64 ± 0.47), with the cerebellum as the reference region, was high and had good reproducibility. The occupancy studies indicated a MP-10 dose of 0.31 ± 0.09 mg/kg (LoganREF)/0.45 ± 0.17mg/kg (SRTM) occupies 50% striatal PDE10A binding sites. Studies in rats and NHPs demonstrated radiolabeled TZ1964B has a high binding affinity and good specificity for PDE10A, as well as favorable in vivo pharmacokinetic properties and binding profiles. Our data suggests that [(11)C]TZ1964B is a promising radioligand for in vivo imaging PDE10A in the brain of living subject.
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Affiliation(s)
- Hui Liu
- Department of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Hongjun Jin
- Department of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Xuyi Yue
- Department of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Xiang Zhang
- Department of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Hao Yang
- Department of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Junfeng Li
- Department of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Hubert Flores
- Department of Neurology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Yi Su
- Department of Neurology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Joel S Perlmutter
- Department of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA; Department of Neurology, Washington University School of Medicine, St. Louis, MO 63110, USA; Department of Physical Therapy and Occupational Therapy, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Zhude Tu
- Department of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA.
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Mikhno A, Zanderigo F, Todd Ogden R, John Mann J, Angelini ED, Laine AF, Parsey RV. Toward noninvasive quantification of brain radioligand binding by combining electronic health records and dynamic PET imaging data. IEEE J Biomed Health Inform 2015; 19:1271-82. [PMID: 25823051 DOI: 10.1109/jbhi.2015.2416251] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Quantitative analysis of positron emission tomography (PET) brain imaging data requires a metabolite-corrected arterial input function (AIF) for estimation of distribution volume and related outcome measures. Collecting arterial blood samples adds risk, cost, measurement error, and patient discomfort to PET studies. Minimally invasive AIF estimation is possible with simultaneous estimation (SIME), but at least one arterial blood sample is necessary. In this study, we describe a noninvasive SIME (nSIME) approach that utilizes a pharmacokinetic input function model and constraints derived from machine learning applied to an electronic health record database consisting of "long tail" data (digital records, paper charts, and handwritten notes) that were collected ancillary to the PET studies. We evaluated the performance of nSIME on 95 [(11)C]DASB PET scans that had measured AIFs. The results indicate that nSIME is a promising alternative to invasive AIF measurement. The general framework presented here may be expanded to other metabolized radioligands, potentially enabling quantitative analysis of PET studies without blood sampling. A glossary of technical abbreviations is provided at the end of this paper.
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22
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Noninvasive blood-free full quantification of positron emission tomography radioligand binding. J Cereb Blood Flow Metab 2015; 35:148-56. [PMID: 25370860 PMCID: PMC4294408 DOI: 10.1038/jcbfm.2014.191] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2014] [Revised: 09/19/2014] [Accepted: 10/08/2014] [Indexed: 11/09/2022]
Abstract
Full quantification of a positron emission tomography (PET) radioligand binding to its target is preferred because it requires the fewest assumptions, but generally involves measuring the concentration of free radioligand in the arterial plasma by collecting blood samples from the subject's radial artery during the scan, and performing metabolite analysis. This invasive, costly procedure deters subjects' participation, and requires specialized staff and equipment. Simultaneous estimation (SIME) can fully quantify binding using only PET data from multiple brain regions and one individual anchor value, which is based on a single arterial blood sample. Drawing this sample can still be challenging in clinical settings, particularly when using simultaneous PET/magnetic resonance scanners. Here we propose a methodology for full quantification of binding that does not require any blood samples. The methodology substitutes the SIME blood-based anchor with a value predicted using multiple linear regression of noninvasive, easy-to-collect variables related to the radioligand blood concentration, and individual metabolism, such as injected dose, body mass index, or body surface area. As a study case, we show here the methodology in comparison to analysis with full arterial-line blood sampling in a cohort of 23 available scans with [(11)C]CUMI-101, a partial agonist of the serotonin 5-HT1A receptors.
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Recent advances in parametric neuroreceptor mapping with dynamic PET: basic concepts and graphical analyses. Neurosci Bull 2014; 30:733-54. [PMID: 25260795 DOI: 10.1007/s12264-014-1465-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2014] [Accepted: 08/15/2014] [Indexed: 10/24/2022] Open
Abstract
Tracer kinetic modeling in dynamic positron emission tomography (PET) has been widely used to investigate the characteristic distribution patterns or dysfunctions of neuroreceptors in brain diseases. Its practical goal has progressed from regional data quantification to parametric mapping that produces images of kinetic-model parameters by fully exploiting the spatiotemporal information in dynamic PET data. Graphical analysis (GA) is a major parametric mapping technique that is independent on any compartmental model configuration, robust to noise, and computationally efficient. In this paper, we provide an overview of recent advances in the parametric mapping of neuroreceptor binding based on GA methods. The associated basic concepts in tracer kinetic modeling are presented, including commonly-used compartment models and major parameters of interest. Technical details of GA approaches for reversible and irreversible radioligands are described, considering both plasma input and reference tissue input models. Their statistical properties are discussed in view of parametric imaging.
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