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Jolly AA, Brown RB, Tozer DJ, Hong YT, Fryer TD, Aigbirhio FI, O'Brien JT, Markus HS. Are central and systemic inflammation associated with fatigue in cerebral small vessel disease? Int J Stroke 2024:17474930241245613. [PMID: 38533609 DOI: 10.1177/17474930241245613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2024]
Abstract
BACKGROUND Fatigue is a common symptom in cerebral small vessel disease (SVD), but its pathogenesis is poorly understood. It has been suggested that inflammation may play a role. We determined whether central (neuro) inflammation and peripheral inflammation were associated with fatigue in SVD. METHODS Notably, 36 patients with moderate-to-severe SVD underwent neuropsychometric testing, combined positron emission tomography and magnetic resonance imaging (PET-MRI) scan, and blood draw for the analysis of inflammatory blood biomarkers. Microglial signal was taken as a proxy for neuroinflammation, assessed with radioligand 11C-PK11195. Of these, 30 subjects had full PET datasets for analysis. We assessed global 11C-PK11195 binding and hotspots of 11C-PK11195 binding in the normal-appearing white matter, lesioned tissue, and combined total white matter. Peripheral inflammation was assessed with serum C-reactive protein (CRP) and using the Olink cardiovascular III proteomic panel comprising 92 biomarkers of cardiovascular inflammation and endothelial activation. Fatigue was assessed using the fatigue severity scale (FSS), the visual analog fatigue scale, and a subscale of the Geriatric Depression Scale. RESULTS Mean (SD) age was 68.7 (11.2) years, and 63.9% were male. Of these, 55.6% showed fatigue on the FSS. Fatigued participants had higher disability scores (p = 0.02), higher total GDS scores (p = 0.02), and more commonly reported a history of depression (p = 0.04). 11C-PK11195 ligand binding in the white matter was not associated with any measure of fatigue. Serum CRP was significantly associated with average fatigue score on FSS (ρ = 0.48, p = 0.004); this association persisted when controlling for age, sex, disability score, and depression (β = 0.49, 95% CI (0.17, 2.26), p = 0.03). Blood biomarkers from the Olink panel showed no association with fatigue. CONCLUSION In symptomatic SVD patients, neuroinflammation, assessed with microglial marker 11C-PK11195, was not associated with fatigue. We found some evidence for a role of systematic inflammation, evidenced by an association between fatigue severity and raised CRP, but further studies are required to understand this relationship and inform whether it could be therapeutically modified to reduce fatigue severity. DATA ACCESS STATEMENT Data for this study are available from the corresponding author upon reasonable request.
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Affiliation(s)
- Amy A Jolly
- Stroke Research Group, Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK
| | - Robin B Brown
- Stroke Research Group, Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK
| | - Daniel J Tozer
- Stroke Research Group, Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK
| | - Young T Hong
- Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK
- Wolfson Brain Imaging Centre, Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK
| | - Tim D Fryer
- Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK
- Wolfson Brain Imaging Centre, Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK
| | - Franklin I Aigbirhio
- Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK
- Wolfson Brain Imaging Centre, Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK
| | - John T O'Brien
- Wolfson Brain Imaging Centre, Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK
| | - Hugh S Markus
- Stroke Research Group, Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK
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Torregiani C, Reale M, Confalonieri M, Dore F, Crisafulli C, Baratella E, Salton F, Confalonieri P, Ruaro B, Maiello G. Cardiopulmonary exercise testing complements both spirometry and nuclear imaging for assessing sarcoidosis stage and for monitoring disease activity. Sarcoidosis Vasc Diffuse Lung Dis 2024; 41:e2024017. [PMID: 38567559 PMCID: PMC11008331 DOI: 10.36141/svdld.v41i1.15125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Accepted: 01/09/2024] [Indexed: 04/04/2024]
Abstract
BACKGROUND Pulmonary sarcoidosis is a systemic disease that can confound established follow-up tools. Pulmonary function tests (PFTs) are recommended in initial and follow-up patient evaluations yet are imperfect predictors of disease progression. The cardiopulmonary exercise test (CPET) is another potentially useful monitoring tool, although previous studies report conflicting findings regarding which variables are altered by the disease. Nuclear imaging tests are also employed to assess inflammatory activity and may be predictive of functional deterioration. AIM We asked whether PFTs or CPET are more diagnostic of disease stage, which subsets of functional variables are impacted by the disease, and how these relate to nuclear imaging signs of active inflammation. STUDY DESIGN AND METHODS We collected retrospective data (spirometry, CPET, Gallium-67 scintigraphy, 18F-FDG PET/CT) from 48 patients and 10 controls. Disease severity was assessed following Scadding classification. First, we correlated individual PFTs and CPET parameters to Scadding stage and nuclear imaging data. Next, we performed Principal Component Analysis (PCA) on PFTs and CPET parameters, separated into respiratory, cardiovascular and metabolic subsets. Finally, we constructed multiple regression models to determine which variable subsets were the best predictors of Scadding stage and disease activity. RESULTS The majority of PFTs and CPET single parameters were significantly correlated with patient stage, while only few correlated with disease activity. Nevertheless, multiple regression models were able to significantly relate PFTs and CPET to both disease stage and activity. Additionally, these analyses highlighted CPET cardiovascular parameters as the best overall predictors of disease stage and activity. CONCLUSIONS Our results display how CPET and spirometry data complement each other for sarcoidosis disease staging, and how these tests are able to detect disease activity. Our findings suggest that CPET, a repeatable and non-invasive functional test, should be more routinely performed and taken into account in sarcoidosis patient follow-up.
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Affiliation(s)
| | - Matia Reale
- Pulmonology Unit, Hospital SS. Antonio e Biagio e Cesare Arrigo, Alessandria, Italy
| | | | - Franca Dore
- Nuclear Medicine Unit University Hospital of Cattinara, Trieste, Italy
| | | | - Elisa Baratella
- Institute of Radiology, University Hospital of Cattinara, Trieste, Italy
| | - Francesco Salton
- Pulmonology Unit, University Hospital of Cattinara, Trieste, Italy
| | | | - Barbara Ruaro
- Pulmonology Unit, University Hospital of Cattinara, Trieste, Italy
- Share co-senior authorship
| | - Guido Maiello
- School of Psychology, University of Southampton, Southampton, UK
- Share co-senior authorship
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Siddiqui NA, Ventrola AJ, Hartman AR, Konare T, Kamble NS, Thomas SC, Madaan T, Kharofa J, Sertorio MG, Kotagiri N. An Engineered Probiotic Platform for Cancer Epitope-Independent Targeted Radionuclide Therapy of Solid Tumors. Adv Healthc Mater 2023; 12:e2202870. [PMID: 36913614 PMCID: PMC10497710 DOI: 10.1002/adhm.202202870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 03/06/2023] [Indexed: 03/15/2023]
Abstract
Targeted radionuclide therapy (TRT) is an emerging therapeutic modality for the treatment of various solid cancers. Current approaches rely on the presence of cancer-specific epitopes and receptors against which a radiolabeled ligand is systemically administered to specifically deliver cytotoxic doses of α and β particles to tumors. In this proof-of-concept study, tumor-colonizing Escherichia coli Nissle 1917 (EcN) is utilized to deliver a bacteria-specific radiopharmaceutical to solid tumors in a cancer-epitope independent manner. In this microbe-based pretargeted approach, the siderophore-mediated metal uptake pathway is leveraged to selectively concentrate copper radioisotopes, 64 Cu and 67 Cu, complexed to yersiniabactin (YbT) in the genetically modified bacteria. 64 Cu-YbT facilitates positron emission tomography (PET) imaging of the intratumoral bacteria, whereas 67 Cu-YbT delivers a cytotoxic dose to the surrounding cancer cells. PET imaging with 64 Cu-YbT reveals persistence and sustained growth of the bioengineered microbes in the tumor microenvironment. Survival studies with 67 Cu-YbT reveals significant attenuation of tumor growth and extends survival of both MC38 and 4T1 tumor-bearing mice harboring the microbes. Tumor response to this pretargeted approach correlates with promising anti-tumor immunity, with noticeable CD8+ T:Treg cell ratio. Their strategy offers a pathway to target and ablate multiple solid tumors independent of their epitope and receptor phenotype.
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Affiliation(s)
- Nabil A. Siddiqui
- Division of Pharmaceutical Sciences, James L. Winkle College of Pharmacy, University of Cincinnati, Cincinnati, OH, USA
| | - Alec J. Ventrola
- Division of Pharmaceutical Sciences, James L. Winkle College of Pharmacy, University of Cincinnati, Cincinnati, OH, USA
| | - Alexandra R. Hartman
- Division of Pharmaceutical Sciences, James L. Winkle College of Pharmacy, University of Cincinnati, Cincinnati, OH, USA
| | - Tohonne Konare
- Division of Pharmaceutical Sciences, James L. Winkle College of Pharmacy, University of Cincinnati, Cincinnati, OH, USA
| | - Nitin S. Kamble
- Division of Pharmaceutical Sciences, James L. Winkle College of Pharmacy, University of Cincinnati, Cincinnati, OH, USA
| | - Shindu C. Thomas
- Division of Pharmaceutical Sciences, James L. Winkle College of Pharmacy, University of Cincinnati, Cincinnati, OH, USA
| | - Tushar Madaan
- Division of Pharmaceutical Sciences, James L. Winkle College of Pharmacy, University of Cincinnati, Cincinnati, OH, USA
| | - Jordan Kharofa
- Department of Radiation Oncology, College of Medicine, University of Cincinnati, Cincinnati, OH, USA
| | - Mathieu G. Sertorio
- Department of Radiation Oncology, College of Medicine, University of Cincinnati, Cincinnati, OH, USA
| | - Nalinikanth Kotagiri
- Division of Pharmaceutical Sciences, James L. Winkle College of Pharmacy, University of Cincinnati, Cincinnati, OH, USA
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Weiss AR, Bertoglio D, Liguore WA, Brandon K, Templon J, Link J, McBride JL. Reduced D 2 /D 3 Receptor Binding and Glucose Metabolism in a Macaque Model of Huntington's Disease. Mov Disord 2023; 38:143-147. [PMID: 36544385 PMCID: PMC9948637 DOI: 10.1002/mds.29271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Accepted: 10/04/2022] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Dopamine system dysfunction and altered glucose metabolism are implicated in Huntington's disease (HD), a neurological disease caused by mutant huntingtin (mHTT) expression. OBJECTIVE The aim was to characterize alterations in cerebral dopamine D2 /D3 receptor density and glucose utilization in a newly developed AAV-mediated NHP model of HD that expresses mHTT throughout numerous brain regions. METHODS Positron emission tomography (PET) imaging was performed using [18 F]fallypride to quantify D2 /D3 receptor density and 2-[18 F]fluoro-2-deoxy-d-glucose ([18 F]FDG) to measure cerebral glucose utilization in these HD macaques. RESULTS Compared to controls, HD macaques showed significantly reduced dopamine D2 /D3 receptor densities in basal ganglia (P < 0.05). In addition, HD macaques displayed significant glucose hypometabolism throughout the cortico-basal ganglia network (P < 0.05). CONCLUSIONS [18 F]Fallypride and [18 F]FDG are PET imaging biomarkers of mHTT-mediated disease progression that can be used as noninvasive outcome measures in future therapeutic studies with this AAV-mediated HD macaque model. © 2022 International Parkinson and Movement Disorder Society.
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Affiliation(s)
- Alison R. Weiss
- Division of Neuroscience, Oregon National Primate Research Center, Beaverton, OR
| | - Daniele Bertoglio
- Molecular Imaging Center Antwerp (MICA), University of Antwerp, Belgium
| | - William A. Liguore
- Division of Neuroscience, Oregon National Primate Research Center, Beaverton, OR
| | - Kristin Brandon
- Division of Neuroscience, Oregon National Primate Research Center, Beaverton, OR
| | - John Templon
- Division of Cardiometabolic Health, Oregon National Primate Research Center, Beaverton, OR
| | - Jeanne Link
- Center for Radiochemistry Research, Oregon Health and Science University, Portland, OR
| | - Jodi L. McBride
- Division of Neuroscience, Oregon National Primate Research Center, Beaverton, OR
- Dept. of Behavioral Neuroscience, Oregon National Primate Research Center, Beaverton, OR
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Sammartano A, Migliari S, Serreli G, Scarlattei M, Baldari G, Ruffini L. Validation of the HPLC Analytical Method for the Determination of Chemical and Radiochemical Purity of Ga-68-DOTATATE. Indian J Nucl Med 2023; 38:1-7. [PMID: 37180199 PMCID: PMC10171759 DOI: 10.4103/ijnm.ijnm_11_22] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 03/18/2022] [Accepted: 04/04/2022] [Indexed: 02/25/2023] Open
Abstract
Purpose of the Study Ga-68-DOTA-peptides targeting somatostatin receptors have been assessed as a valuable tool in neuroendocrine tumors imaging using positron emission tomography (PET). A new selective and sensitive high-pressure liquid chromatography (HPLC) method was developed for determining chemical and radiochemical purity of Ga-68-DOTATATE (PET) tracer. The identification of peaks was achieved on a symmetry C18 column 3 μm 120Å (3.0 mm × 150 mm spherical particles) using (A) water + 0.1% trifluoroacetic acid (TFA) and (B) acetonitrile + 0.1% TFA, as the mobile phases at a flow rate of 0.600 mL/min and monitored at 220 nm. The run time was 16 min. Materials and Methods The method was validated to fulfill International Conference on Harmonization requirements and EDQM guidelines, and it included specificity, linearity, limit of detection (LOD), limit of quantification (LOQ), accuracy, and precision. Results The calibration curve was linear over the concentration range from 0.5 to 3 μg/ml, with a correlation coefficient (r2) equal to 0.999, average coefficient of variation (CV%) 2%, and average bias% did not deviate more than 5% for all concentrations. The LOD and LOQ for DOTATATE were 0.5 and 0.1 μg/mL, respectively. The method was considered precise, obtaining coefficients of variation between 0.22% and 0.52% for intraday and 0.20% and 0.61% for interday precision. Accuracy of method was confirmed with average bias% that did not deviate more than 5% for all concentrations. Conclusion All results were acceptable and this confirmed that the method is suitable for its intended use in routine quality control of Ga-68-DOTATATE to guarantee the high quality of the finished product before release.
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Affiliation(s)
- Antonino Sammartano
- Department of Nuclear Medicine and Molecular Imaging, University Hospital of Parma, Via Gramsci, Italy
| | - Silvia Migliari
- Department of Nuclear Medicine and Molecular Imaging, University Hospital of Parma, Via Gramsci, Italy
| | - Giulio Serreli
- Department of Diagnostic, Medical Physics Unit, University Hospital of Parma, Via Gramsci, Parma, Italy
| | - Maura Scarlattei
- Department of Nuclear Medicine and Molecular Imaging, University Hospital of Parma, Via Gramsci, Italy
| | - Giorgio Baldari
- Department of Nuclear Medicine and Molecular Imaging, University Hospital of Parma, Via Gramsci, Italy
| | - Livia Ruffini
- Department of Nuclear Medicine and Molecular Imaging, University Hospital of Parma, Via Gramsci, Italy
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6
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Wang H, Guo J, Lin W, Fu Z, Ji X, Yu B, Lu M, Cui W, Deng L, Engle JW, Wu Z, Cai W, Ni D. Open-Shell Nanosensitizers for Glutathione Responsive Cancer Sonodynamic Therapy. Adv Mater 2022; 34:e2110283. [PMID: 35179801 PMCID: PMC9012683 DOI: 10.1002/adma.202110283] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 02/13/2022] [Indexed: 05/10/2023]
Abstract
Deleterious effects to normal tissues and short biological half-life of sonosensitizers limit the applications of sonodynamic therapy (SDT). Herein, a new sonosensitizer (Cu(II)NS) is synthesized that consists of porphyrins, chelated Cu2+ , and poly(ethylene glycol) (PEG) to overcome the challenges of SDT. As Cu2+ contains 27 electrons, Cu(II)NS has an unpaired electron (open shell), resulting in a doublet ground state and little sonosensitivity. Overexpressed glutathione in the tumor can reduce Cu2+ to generate Cu(I)NS, leading to a singlet ground state and recuperative sonosensitivity. Additionally, PEG endows Cu(II)NS with increased blood biological half-life and enhanced tumor accumulation, further increasing the effect of SDT. Through regulating the valence state of Cu, cancer SDT with enhanced therapeutic index is achieved.
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Affiliation(s)
- Han Wang
- Department of Orthopaedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, P. R. China
| | - Jinxiao Guo
- Department of Orthopaedics, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai, 200233, P. R. China
| | - Wilson Lin
- Departments of Radiology and Medical Physics, University of Wisconsin, Madison, WI, 53705, USA
| | - Zi Fu
- Department of Orthopaedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, P. R. China
| | - Xiuru Ji
- Department of Orthopaedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, P. R. China
| | - Bo Yu
- Departments of Radiology and Medical Physics, University of Wisconsin, Madison, WI, 53705, USA
| | - Min Lu
- Department of Orthopaedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, P. R. China
| | - Wenguo Cui
- Department of Orthopaedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, P. R. China
| | - Lianfu Deng
- Department of Orthopaedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, P. R. China
| | - Jonathan W Engle
- Departments of Radiology and Medical Physics, University of Wisconsin, Madison, WI, 53705, USA
| | - Zhiyuan Wu
- Department of Interventional Radiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, P. R. China
| | - Weibo Cai
- Departments of Radiology and Medical Physics, University of Wisconsin, Madison, WI, 53705, USA
| | - Dalong Ni
- Department of Orthopaedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, P. R. China
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7
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van der Zee S, Kanel P, Gerritsen MJJ, Boertien JM, Slomp AC, Müller MLTM, Bohnen NI, Spikman JM, van Laar T. Altered Cholinergic Innervation in De Novo Parkinson's Disease with and without Cognitive Impairment. Mov Disord 2022; 37:713-723. [PMID: 35037719 PMCID: PMC9306739 DOI: 10.1002/mds.28913] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 12/15/2021] [Accepted: 12/15/2021] [Indexed: 01/22/2023] Open
Abstract
Background Altered cholinergic innervation plays a putative role in cognitive impairment in Parkinson's disease (PD) at least in advanced stages. Identification of the relationship between cognitive impairment and cholinergic innervation early in the disease will provide better insight into disease prognosis and possible early intervention. Objective The aim was to assess regional cholinergic innervation status in de novo patients with PD, with and without cognitive impairment. Methods Fifty‐seven newly diagnosed, treatment‐naive, PD patients (32 men, mean age 64.6 ± 8.2 years) and 10 healthy controls (5 men, mean age 54.6 ± 6.0 years) were included. All participants underwent cholinergic [18F]fluoroethoxybenzovesamicol positron emission tomography and detailed neuropsychological assessment. PD patients were classified as either cognitively normal (PD‐NC) or mild cognitive impairment (PD‐MCI). Whole brain voxel‐based group comparisons were performed. Results Results show bidirectional cholinergic innervation changes in PD. Both PD‐NC and PD‐MCI groups showed significant cortical cholinergic denervation compared to controls (P < 0.05, false discovery rate corrected), primarily in the posterior cortical regions. Higher‐than‐normal binding was most prominent in PD‐NC in both cortical and subcortical regions, including the cerebellum, cingulate cortex, putamen, gyrus rectus, hippocampus, and amygdala. Conclusion Altered cholinergic innervation is already present in de novo patients with PD. Posterior cortical cholinergic losses were present in all patients independent of cognitive status. Higher‐than‐normal binding in cerebellar, frontal, and subcortical regions in cognitively intact patients may reflect compensatory cholinergic upregulation in early‐stage PD. Limited or failing cholinergic upregulation may play an important role in early, clinically evident cognitive impairment in PD. © 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)
- Sygrid van der Zee
- Department of Neurology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands.,Department of Neurology, Division of Clinical Neuropsychology, University of Groningen, University Medical Center, Groningen, The Netherlands
| | - Prabesh Kanel
- Department of Radiology, University of Michigan, Ann Arbor, Michigan, USA.,Morris K. Udall Center of Excellence for Parkinson's Disease Research, University of Michigan, Ann Arbor, Michigan, USA
| | - Marleen J J Gerritsen
- Department of Neurology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands.,Department of Neurology, Division of Clinical Neuropsychology, University of Groningen, University Medical Center, Groningen, The Netherlands
| | - Jeffrey M Boertien
- Department of Neurology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Anne C Slomp
- Department of Neurology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands.,Department of Neurology, Division of Clinical Neuropsychology, University of Groningen, University Medical Center, Groningen, The Netherlands
| | - Martijn L T M Müller
- Department of Radiology, University of Michigan, Ann Arbor, Michigan, USA.,Morris K. Udall Center of Excellence for Parkinson's Disease Research, University of Michigan, Ann Arbor, Michigan, USA
| | - Nicolaas I Bohnen
- Department of Radiology, University of Michigan, Ann Arbor, Michigan, USA.,Morris K. Udall Center of Excellence for Parkinson's Disease Research, University of Michigan, Ann Arbor, Michigan, USA.,Department of Neurology, University of Michigan, Ann Arbor, Michigan, USA.,Neurology Service and GRECC, Veterans Administration Ann Arbor Healthcare System, Ann Arbor, Michigan, USA.,University of Michigan Parkinson's Foundation Center of Excellent, Ann Arbor, Michigan, USA
| | - Jacoba M Spikman
- Department of Neurology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands.,Department of Neurology, Division of Clinical Neuropsychology, University of Groningen, University Medical Center, Groningen, The Netherlands
| | - Teus van Laar
- Department of Neurology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
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Roy M, Fortier M, Rheault F, Edde M, Croteau E, Castellano C, Langlois F, St‐Pierre V, Cuenoud B, Bocti C, Fulop T, Descoteaux M, Cunnane SC. A ketogenic supplement improves white matter energy supply and processing speed in mild cognitive impairment. Alzheimers Dement (N Y) 2021; 7:e12217. [PMID: 34869825 PMCID: PMC8596139 DOI: 10.1002/trc2.12217] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 06/03/2021] [Accepted: 09/17/2021] [Indexed: 12/22/2022]
Abstract
INTRODUCTION White matter (WM) energy supply is crucial for axonal function and myelin maintenance. An exogenous source of ketones, the brain's alternative fuel to glucose, bypasses the brain's glucose-specific energy deficit and improves cognitive outcomes in mild cognitive impairment (MCI). How an additional supply of ketones affects glucose or ketone uptake in specific WM fascicles in MCI has not previously been reported. METHODS This 6-month interventional study included MCI participants randomized to a placebo (n = 16) or ketogenic medium chain triglyceride (kMCT; n = 17) drink. A neurocognitive battery and brain imaging were performed pre- and post-intervention. WM fascicle uptake of ketone and glucose and structural properties were assessed using positron emission tomography and diffusion imaging, respectively. RESULTS Ketone uptake was increased in the kMCT group by 2.5- to 3.2-fold in all nine WM fascicles of interest (P < .001), an effect seen both in deep WM and in fascicle cortical endpoints. Improvement in processing speed was positively associated with WM ketone uptake globally and in individual fascicles, most importantly the fornix (r = +0.61; P = .014). DISCUSSION A 6-month kMCT supplement improved WM energy supply in MCI by increasing ketone uptake in WM fascicles. The significant positive association with processing speed suggests that ketones may have a role in myelin integrity in MCI.
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Affiliation(s)
- Maggie Roy
- Research Center on AgingCIUSSS de l'Estrie–CHUSSherbrookeQuebecCanada
- Department of Pharmacology and PhysiologyUniversité de SherbrookeSherbrookeQuebecCanada
- Department of Computer ScienceUniversité de SherbrookeSherbrookeQuebecCanada
| | - Mélanie Fortier
- Research Center on AgingCIUSSS de l'Estrie–CHUSSherbrookeQuebecCanada
| | - François Rheault
- Department of Computer ScienceUniversité de SherbrookeSherbrookeQuebecCanada
| | - Manon Edde
- Department of Computer ScienceUniversité de SherbrookeSherbrookeQuebecCanada
| | - Etienne Croteau
- Centre de Recherche‐CHUSCIUSSS de l'Estrie–CHUSSherbrookeQuebecCanada
- Sherbrooke Molecular Imaging CenterUniversité de SherbrookeSherbrookeQuebecCanada
| | | | - Francis Langlois
- Research Center on AgingCIUSSS de l'Estrie–CHUSSherbrookeQuebecCanada
| | - Valérie St‐Pierre
- Research Center on AgingCIUSSS de l'Estrie–CHUSSherbrookeQuebecCanada
| | | | - Christian Bocti
- Research Center on AgingCIUSSS de l'Estrie–CHUSSherbrookeQuebecCanada
- Department of MedicineUniversité de SherbrookeSherbrookeQuebecCanada
| | - Tamas Fulop
- Research Center on AgingCIUSSS de l'Estrie–CHUSSherbrookeQuebecCanada
- Department of MedicineUniversité de SherbrookeSherbrookeQuebecCanada
| | - Maxime Descoteaux
- Department of Computer ScienceUniversité de SherbrookeSherbrookeQuebecCanada
| | - Stephen C. Cunnane
- Research Center on AgingCIUSSS de l'Estrie–CHUSSherbrookeQuebecCanada
- Department of Pharmacology and PhysiologyUniversité de SherbrookeSherbrookeQuebecCanada
- Department of MedicineUniversité de SherbrookeSherbrookeQuebecCanada
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Zhu H, Zhang H, Zhou N, Ding J, Jiang J, Liu T, Liu Z, Wang F, Zhang Q, Zhang Z, Yan S, Li L, Benabdallah N, Jin H, Liu Z, Cai L, Thorek DLJ, Yang X, Yang Z. Molecular PET/CT Profiling of ACE2 Expression In Vivo: Implications for Infection and Outcome from SARS-CoV-2. Adv Sci (Weinh) 2021; 8:e2100965. [PMID: 34174177 PMCID: PMC8373167 DOI: 10.1002/advs.202100965] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 05/14/2021] [Indexed: 06/07/2023]
Abstract
Rapid progress has been made to identify and study the causative agent leading to coronavirus disease 2019 (COVID-19) but many questions including who is most susceptible and what determines severity remain unanswered. Angiotensin-converting enzyme 2 (ACE2) is a key factor in the infection process of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2). In this study, molecularly specific positron emission tomography imaging agents for targeting ACE2 are first developed, and these novel agents are evaluated in vitro, in preclinical model systems, and in a first-in-human translational ACE2 imaging of healthy volunteers and a SARS-CoV-2 recovered patient (NCT04422457). ACE2 expression levels in different organs in live subjects are quantitatively delineated and observable differences are measured in the patient recovered from COVID-19. Surprising sites of uptake in the breast, reproductive system and very low uptake in pulmonary tissues are reported. This novel method can add a unique tool to facilitate SARS-CoV-2 related research and improve understanding of this enigmatic disease. Molecular imaging provides quantitative annotation of ACE2, the SARS-CoV-2 entry receptor, to noninvasively monitor organs impacted by the COVID-19.
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Affiliation(s)
- Hua Zhu
- Key Laboratory of Carcinogenesis and Translational Research, NMPA Key Laboratory for Research Evaluation of Radiopharmaceuticals (Ministry of Education/Beijing)Department of Nuclear MedicinePeking University Cancer Hospital and InstituteBeijing100142China
| | - Hanwen Zhang
- Department of RadiologyWashington University in St. Louis School of MedicineSt. LouisMO63110USA
- Program in Quantitative Molecular TherapeuticsWashington University in St. Louis School of MedicineSt. LouisMO63110USA
| | - Nina Zhou
- Key Laboratory of Carcinogenesis and Translational Research, NMPA Key Laboratory for Research Evaluation of Radiopharmaceuticals (Ministry of Education/Beijing)Department of Nuclear MedicinePeking University Cancer Hospital and InstituteBeijing100142China
| | - Jin Ding
- Key Laboratory of Carcinogenesis and Translational Research, NMPA Key Laboratory for Research Evaluation of Radiopharmaceuticals (Ministry of Education/Beijing)Department of Nuclear MedicinePeking University Cancer Hospital and InstituteBeijing100142China
| | - Jinquan Jiang
- Key Laboratory of Carcinogenesis and Translational Research, NMPA Key Laboratory for Research Evaluation of Radiopharmaceuticals (Ministry of Education/Beijing)Department of Nuclear MedicinePeking University Cancer Hospital and InstituteBeijing100142China
| | - Teli Liu
- Key Laboratory of Carcinogenesis and Translational Research, NMPA Key Laboratory for Research Evaluation of Radiopharmaceuticals (Ministry of Education/Beijing)Department of Nuclear MedicinePeking University Cancer Hospital and InstituteBeijing100142China
| | - Ziyu Liu
- Key Laboratory of Carcinogenesis and Translational Research, NMPA Key Laboratory for Research Evaluation of Radiopharmaceuticals (Ministry of Education/Beijing)Department of Nuclear MedicinePeking University Cancer Hospital and InstituteBeijing100142China
- Department of Nuclear MedicineThe Affiliated Hospital of Inner Mongolia Medical UniversityHohhot010050China
| | - Feng Wang
- Key Laboratory of Carcinogenesis and Translational Research, NMPA Key Laboratory for Research Evaluation of Radiopharmaceuticals (Ministry of Education/Beijing)Department of Nuclear MedicinePeking University Cancer Hospital and InstituteBeijing100142China
| | - Qian Zhang
- Key Laboratory of Carcinogenesis and Translational Research, NMPA Key Laboratory for Research Evaluation of Radiopharmaceuticals (Ministry of Education/Beijing)Department of Nuclear MedicinePeking University Cancer Hospital and InstituteBeijing100142China
| | - Zhuochen Zhang
- Department of Nuclear MedicinePeking University First HospitalBeijing100034China
| | - Shi Yan
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing)Department of Thoracic Surgery IIPeking University Cancer Hospital and InstituteBeijing100142China
| | - Lei Li
- Beijing Tongren Eye CenterBeijing Tongren HospitalCapital Medical UniversityBeijing Ophthalmology and Visual Scientific Key LabBeijing100730China
| | - Nadia Benabdallah
- Department of RadiologyWashington University in St. Louis School of MedicineSt. LouisMO63110USA
- Program in Quantitative Molecular TherapeuticsWashington University in St. Louis School of MedicineSt. LouisMO63110USA
| | - Hongjun Jin
- Guangdong Provincial Key Laboratory of Biomedical ImagingFifth Affiliated HospitalSun Yat‐sen UniversityZhuhaiGuangdong Province519000China
| | - Zhaofei Liu
- Medical Isotopes Research Center and Department of Radiation MedicineSchool of Basic Medical SciencesPeking University Health Science CenterBeijing100191China
| | - Lisheng Cai
- Molecular Imaging BranchNational Institute of Mental HealthNational Institutes of HealthBethesdaMD20892USA
| | - Daniel L. J. Thorek
- Department of RadiologyWashington University in St. Louis School of MedicineSt. LouisMO63110USA
- Program in Quantitative Molecular TherapeuticsWashington University in St. Louis School of MedicineSt. LouisMO63110USA
- Department of Biomedical EngineeringWashington University in St. LouisSt. LouisMO63110USA
| | - Xing Yang
- Department of Nuclear MedicinePeking University First HospitalBeijing100034China
| | - Zhi Yang
- Key Laboratory of Carcinogenesis and Translational Research, NMPA Key Laboratory for Research Evaluation of Radiopharmaceuticals (Ministry of Education/Beijing)Department of Nuclear MedicinePeking University Cancer Hospital and InstituteBeijing100142China
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10
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Cho HJ, Huynh TT, Rogers BE, Mirica LM. Design of a multivalent bifunctional chelator for diagnostic 64Cu PET imaging in Alzheimer's disease. Proc Natl Acad Sci U S A 2020; 117:30928-33. [PMID: 33234563 DOI: 10.1073/pnas.2014058117] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Herein, we report a 64Cu positron emission tomography (PET) imaging agent that shows appreciable in vivo brain uptake and exhibits high specific affinity for beta-amyloid (Aβ) aggregates, leading to the successful PET imaging of amyloid plaques in the brains of 5xFAD mice versus those of wild-type mice. The employed approach uses a bifunctional chelator with two Aβ-interacting fragments that dramatically improves the Aβ-binding affinity and lipophilicity for favorable blood-brain barrier penetration, while the use of optimized-length spacers between the Cu-chelating group and the Aβ-interacting fragments further improves the in vivo Aβ-binding specificity and brain uptake of the corresponding 64Cu PET imaging agent.
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11
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Mishra A, Castañeda TR, Bader E, Elshorst B, Cummings S, Scherer P, Bangari DS, Loewe C, Schreuder H, Pöverlein C, Helms M, Jones S, Zech G, Licher T, Wagner M, Schudok M, de Hoop M, Plowright AT, Atzrodt J, Kannt A, Laitinen I, Derdau V. Triantennary GalNAc Molecular Imaging Probes for Monitoring Hepatocyte Function in a Rat Model of Nonalcoholic Steatohepatitis. Adv Sci (Weinh) 2020; 7:2002997. [PMID: 33344141 PMCID: PMC7739951 DOI: 10.1002/advs.202002997] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 09/08/2020] [Indexed: 05/12/2023]
Abstract
Nonalcoholic steatohepatitis (NASH) is a progressive form of nonalcoholic fatty liver disease that can lead to irreversible liver cirrhosis and cancer. Early diagnosis of NASH is vital to detect disease before it becomes life-threatening, yet noninvasively differentiating NASH from simple steatosis is challenging. Herein, bifunctional probes have been developed that target the hepatocyte-specific asialoglycoprotein receptor (ASGPR), the expression of which decreases during NASH progression. The results show that the probes allow longitudinal, noninvasive monitoring of ASGPR levels by positron emission tomography in the newly developed rat model of NASH. The probes open new possibilities for research into early diagnosis of NASH and development of drugs to slow or reverse its progression.
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Affiliation(s)
| | - Tamara R. Castañeda
- R&D DiabetesSanofi‐Aventis Deutschland GmbHIndustriepark Höchst65926FrankfurtGermany
| | - Erik Bader
- Industriepark Höchst65926FrankfurtGermany
| | | | - Sheila Cummings
- Global Discovery PathologyTranslational In Vivo ModelsSanofi GenzymeThe Mountain RoadFraminghamMA01701USA
| | - Petra Scherer
- Global BioimagingTranslational In Vivo ModelsSanofi‐Aventis Deutschland GmbHIndustriepark Höchst65926FrankfurtGermany
| | - Dinesh S. Bangari
- Global Discovery PathologyTranslational In Vivo ModelsSanofi GenzymeThe Mountain RoadFraminghamMA01701USA
| | | | | | | | - Mike Helms
- Global BioimagingTranslational In Vivo ModelsSanofi‐Aventis Deutschland GmbHIndustriepark Höchst65926FrankfurtGermany
| | - Seth Jones
- Industriepark Höchst65926FrankfurtGermany
| | | | | | | | - Manfred Schudok
- R&D Drug Metabolism and PharmacokineticsSanofi‐Aventis Deutschland GmbHIndustriepark Höchst65926FrankfurtGermany
| | | | - Alleyn T. Plowright
- Industriepark Höchst65926FrankfurtGermany
- Wren Therapeutics Ltd.Department of ChemistryUniversity of CambridgeLensfield RdCambridgeCB2 1EWUK
| | - Jens Atzrodt
- R&D Transversal OperationsGerman R&D HubSanofi‐Aventis Deutschland GmbHIndustriepark Höchst65926FrankfurtGermany
| | - Aimo Kannt
- R&D DiabetesSanofi‐Aventis Deutschland GmbHIndustriepark Höchst65926FrankfurtGermany
- Experimental PharmacologyMedical Faculty MannheimUniversity of Heidelberg68167MannheimGermany
- Fraunhofer IMETranslational Medicine and Pharmacology60596FrankfurtGermany
| | - Iina Laitinen
- Global BioimagingTranslational In Vivo ModelsSanofi‐Aventis Deutschland GmbHIndustriepark Höchst65926FrankfurtGermany
- Present address:
Antaros Medical, Bioventure HubMölndal431 83Sweden
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12
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Abstract
As an invasive nuclear medical imaging technology, positron emission tomography (PET) possess the possibility to imaging the distribution as well as the density of selective receptors via specific PET tracers. Inspired by PET, the development of radio-chemistry has greatly promoted the progress of innovative imaging PET tracers for adenosine receptors, in particular adenosine A2A receptors (A2ARs). PET imaging of A2A receptors play import roles in the research of adenosine related disorders. Several radio-tracers for A2A receptors imaging have been evaluated in human studies. This paper reviews the recent research progress of PET tracers for A2A receptors imaging, and their applications in the diagnosis and treatment of related disease, such as cardiovascular diseases, autoimmune diseases, neurodegenerative and psychiatric disease. The future development of A2A PET tracers were also discussed.
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Affiliation(s)
- Meng-Juan Sun
- Chengdu University of Traditional Chinese Medicine, Chengdu, China
- Acupuncture and Chronobiology Key Laboratory of Sichuan Province, Chengdu, China
| | - Fang Liu
- Department of Laboratory Pathology, Xijing Hospital, Fourth Military Medical University, Xian, China
| | - Ya-Fei Zhao
- Chengdu University of Traditional Chinese Medicine, Chengdu, China
- Acupuncture and Chronobiology Key Laboratory of Sichuan Province, Chengdu, China
| | - Xiao-Ai Wu
- Department of Nuclear Medicine, Laboratory of Clinical Nuclear Medicine, West China Hospital, Sichuan University, Chengdu, China
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13
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Sinusas AJ, Liu C. Multi-Tracer Positron Emission Tomography Quantification of Sympathetic Innervation: Tracer Similarity But Not Equivalence. JACC Cardiovasc Imaging 2020; 14:1437-1439. [PMID: 33221231 DOI: 10.1016/j.jcmg.2020.10.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Accepted: 10/20/2020] [Indexed: 11/30/2022]
Affiliation(s)
- Albert J Sinusas
- Department of Medicine (Section of Cardiovascular Medicine), Yale University School of Medicine, New Haven, Connecticut, USA; Department of Radiology & Biomedical Imaging, Yale University School of Medicine, New Haven, Connecticut, USA; Department of Biomedical Engineering, Yale University, New Haven, Connecticut, USA.
| | - Chi Liu
- Department of Radiology & Biomedical Imaging, Yale University School of Medicine, New Haven, Connecticut, USA; Department of Biomedical Engineering, Yale University, New Haven, Connecticut, USA
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14
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Wang X, Rong G, Yan J, Pan D, Wang L, Xu Y, Yang M, Cheng Y. In Vivo Tracking of Fluorinated Polypeptide Gene Carriers by Positron Emission Tomography Imaging. ACS Appl Mater Interfaces 2020; 12:45763-45771. [PMID: 32940028 DOI: 10.1021/acsami.0c11967] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Fluorinated polymers have attracted increasing attention in gene delivery and cytosolic protein delivery in recent years. In vivo tracking of fluorinated polymers will be of great importance to evaluate their biodistribution, clearance, and safety. However, tracking of polymeric carriers without changing their chemical structures remains a huge challenge. Herein, we reported a series of fluorinated poly-l-(lysine) (F-PLL) with high gene transfection efficiency and excellent biodegradation. Radionuclide 18F was radiolabeled on F-PLL by halogen replacement without chemical modification. The radiolabeling of F-PLL offers positron emission tomography (PET) imaging for in vivo tracking of the polymers. The biodistribution of F-PLL and the DNA complexes revealed by micro-PET imaging illustrated the rapid clearance of fluorinated polymers from liver and intestine after intravenous administration. The results demonstrated that the polymer F-PLL will not be accumulated in the liver and spleen when administrated as a gene carrier. This work presents a new strategy for in vivo tracking fluorinated polymers via PET imaging.
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Affiliation(s)
- Xinyu Wang
- NHC Key Laboratory of Nuclear Medicine, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine. Wuxi 214063, China
| | - Guangyu Rong
- Shanghai Key Laboratory of Regulatory Biology, School of Life Sciences, East China Normal University, Shanghai 200241, China
| | - Junjie Yan
- NHC Key Laboratory of Nuclear Medicine, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine. Wuxi 214063, China
| | - Donghui Pan
- NHC Key Laboratory of Nuclear Medicine, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine. Wuxi 214063, China
| | - Lizhen Wang
- NHC Key Laboratory of Nuclear Medicine, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine. Wuxi 214063, China
| | - Yuping Xu
- NHC Key Laboratory of Nuclear Medicine, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine. Wuxi 214063, China
| | - Min Yang
- NHC Key Laboratory of Nuclear Medicine, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine. Wuxi 214063, China
- Department of Radiopharmaceuticals, School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu 210029, China
| | - Yiyun Cheng
- Shanghai Key Laboratory of Regulatory Biology, School of Life Sciences, East China Normal University, Shanghai 200241, China
- South China Advanced Institute for Soft Matter Science and Technology, School of Molecular Science and Engineering, South China University of Technology, Guangzhou 510640, China
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15
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Li T, Hu X, Fan Q, Chen Z, Zheng Z, Zhang R. The Novel DPP-BDT Nanoparticles as Efficient Photoacoustic Imaging and Positron Emission Tomography Agents in Living Mice. Int J Nanomedicine 2020; 15:5017-5026. [PMID: 32764933 PMCID: PMC7369373 DOI: 10.2147/ijn.s238679] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Accepted: 05/25/2020] [Indexed: 11/23/2022] Open
Abstract
Background Molecular imaging is of great benefit to early disease diagnosis and timely treatment. One of the most striking innovations is the development of multimodal molecular imaging technology, which integrates two or more imaging modalities, largely in view of making the best of the advantages of each modality while overcoming their respective shortcomings. Hence, engineering a versatile and easily prepared nanomaterial with integrating multimodal molecular imaging function holds great promise, but is still a great challenge. Materials and Methods We firstly designed and synthesized a BDT-DPP conjugated polymer and then noncovalent self-assembly with phospholipid-polyethylene glycol endowed BDT-DPP with water solubility and biocompatibility. Followed by [Cu] labeling, the acquired multifunctional nanoparticles (NPs) were studied in detail for the photophysical property. The cytotoxicity and biocompatibility of DPP-BDT NPs were examined through MTT assay and H&E stained analysis. In addition, we investigated the accumulation of the NPs in HepG2 tumor models by positron emission tomography (PET) and photoacoustic (PA) dual-mode imaging. Results and Discussion The DPP-BDT NPs exhibited excellent optical stability, strong near-infrared (NIR) light absorption as well as fine biocompatibility. After tail vein injection into the living mice, the PA signals in the neoplastic tissues were gradually increased and reached to the maximum at the 4-h post-injection, which was consistent with the PET analysis. Such strong PA and PET signals were attributed to the efficient NPs accumulation resulting from the enhanced permeability and retention (EPR) effect. Conclusion The biocompatible DPP-BDT NPs demonstrated to be strong NIR absorption property and PAI sensitivity. Besides, these novel DPP-BDT NPs can act not only as a PA imaging contrast agent but also as an imaging agent for PET.
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Affiliation(s)
- Tingting Li
- Department of Pharmacy, School of Pharmaceutical Science, Shanxi Medical University, Taiyuan, Shanxi, People's Republic of China.,Radiology Department, The Affiliated Bethune Hospital of Shanxi Medical University, Taiyuan, Shanxi, People's Republic of China
| | - Xiaoming Hu
- Institute of Advanced Materials, East China Jiaotong University, Nanchang, Jiangxi, People's Republic of China
| | - Quli Fan
- Key Laboratory for Organic Electronics & Information Displays and Institute of Advanced Materials, Nanjing University of Posts & Telecommunications, Nanjing, Jiangsu, People's Republic of China
| | - Zejing Chen
- Institute of Advanced Materials, East China Jiaotong University, Nanchang, Jiangxi, People's Republic of China
| | - Ziliang Zheng
- Department of Pharmacy, School of Pharmaceutical Science, Shanxi Medical University, Taiyuan, Shanxi, People's Republic of China
| | - Ruiping Zhang
- Radiology Department, The Affiliated Bethune Hospital of Shanxi Medical University, Taiyuan, Shanxi, People's Republic of China
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16
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Lopes Alves I, Collij LE, Altomare D, Frisoni GB, Saint‐Aubert L, Payoux P, Kivipelto M, Jessen F, Drzezga A, Leeuwis A, Wink AM, Visser PJ, van Berckel BN, Scheltens P, Gray KR, Wolz R, Stephens A, Gismondi R, Buckely C, Gispert JD, Schmidt M, Ford L, Ritchie C, Farrar G, Barkhof F, Molinuevo JL. Quantitative amyloid PET in Alzheimer's disease: the AMYPAD prognostic and natural history study. Alzheimers Dement 2020; 16:750-758. [PMID: 32281303 PMCID: PMC7984341 DOI: 10.1002/alz.12069] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Revised: 11/12/2019] [Accepted: 12/23/2019] [Indexed: 12/18/2022]
Abstract
INTRODUCTION The Amyloid Imaging to Prevent Alzheimer's Disease (AMYPAD) Prognostic and Natural History Study (PNHS) aims at understanding the role of amyloid imaging in the earliest stages of Alzheimer's disease (AD). AMYPAD PNHS adds (semi-)quantitative amyloid PET imaging to several European parent cohorts (PCs) to predict AD-related progression as well as address methodological challenges in amyloid PET. METHODS AMYPAD PNHS is an open-label, prospective, multi-center, cohort study recruiting from multiple PCs. Around 2000 participants will undergo baseline amyloid positron emission tomography (PET), half of whom will be invited for a follow-up PET 12 at least 12 months later. RESULTS Primary include several amyloid PET measurements (Centiloid, SUVr, BPND , R1 ), and secondary are their changes from baseline, relationship to other amyloid markers (cerebrospinal fluid and visual assessment), and predictive value of AD-related decline. EXPECTED IMPACT Determining the role of amyloid PET for the understanding of this complex disease and potentially improving secondary prevention trials.
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Affiliation(s)
- Isadora Lopes Alves
- Department of Radiology and Nuclear MedicineAmsterdam UMCVrije Universiteit AmsterdamAmsterdamthe Netherlands
| | - Lyduine E. Collij
- Department of Radiology and Nuclear MedicineAmsterdam UMCVrije Universiteit AmsterdamAmsterdamthe Netherlands
| | - Daniele Altomare
- Laboratory of Neuroimaging of Aging (LANVIE)University of GenevaGenevaSwitzerland
- Memory ClinicUniversity Hospital of GenevaGenevaSwitzerland
| | - Giovanni B. Frisoni
- Laboratory of Neuroimaging of Aging (LANVIE)University of GenevaGenevaSwitzerland
- Memory ClinicUniversity Hospital of GenevaGenevaSwitzerland
| | - Laure Saint‐Aubert
- Department of Nuclear MedicineImaging PoleToulouse, University HospitalToulouseFrance
- Toulouse NeuroImaging CenterUniversité de Toulouse, Inserm, UPSToulouseFrance
| | - Pierre Payoux
- Department of Nuclear MedicineImaging PoleToulouse, University HospitalToulouseFrance
- Toulouse NeuroImaging CenterUniversité de Toulouse, Inserm, UPSToulouseFrance
| | - Miia Kivipelto
- Department of Geriatric MedicineKarolinska University Hospital HuddingeStockholmSweden
| | - Frank Jessen
- Department of Nuclear MedicineUniversity of CologneCologneGermany
| | | | - Annebet Leeuwis
- Department of Neurology, Amsterdam UMCVrije Universiteit AmsterdamAlzheimercenterAmsterdamthe Netherlands
| | - Alle Meije Wink
- Department of Radiology and Nuclear MedicineAmsterdam UMCVrije Universiteit AmsterdamAmsterdamthe Netherlands
| | - Pieter Jelle Visser
- Department of Neurology, Amsterdam UMCVrije Universiteit AmsterdamAlzheimercenterAmsterdamthe Netherlands
| | - Bart N.M. van Berckel
- Department of Radiology and Nuclear MedicineAmsterdam UMCVrije Universiteit AmsterdamAmsterdamthe Netherlands
| | - Philip Scheltens
- Department of Neurology, Amsterdam UMCVrije Universiteit AmsterdamAlzheimercenterAmsterdamthe Netherlands
| | | | | | | | | | | | - Juan Domingo Gispert
- Barcelona β Brain Research CenterBarcelonaSpain
- Centro de Investigación Biomédica en Red de BioingenieríaBiomateriales y Nanomedicina (CIBER‐BBN)MadridSpain
- Universitat Pompeu FabraBarcelonaSpain
| | | | - Lisa Ford
- Janssen Pharmaceutica RNDTitusvilleNew JerseyUSA
| | - Craig Ritchie
- Centre for Clinical Brain SciencesUniversity of EdinburghEdinburghUnited Kingdom
| | - Gill Farrar
- GE HealthcareLife SciencesAmershamUnited Kingdom
| | - Frederik Barkhof
- Department of Radiology and Nuclear MedicineAmsterdam UMCVrije Universiteit AmsterdamAmsterdamthe Netherlands
- Centre for Medical Image ComputingMedical Physics and Biomedical Engineering, UCLLondonUnited Kingdom
| | - José Luis Molinuevo
- Barcelona β Brain Research CenterBarcelonaSpain
- Universitat Pompeu FabraBarcelonaSpain
- Centro de Investigación Biomédica en Red de Fragilidad y Envejecimiento Saludable (CIBERFES)MadridSpain
| | - the AMYPAD Consortium
- Department of Radiology and Nuclear MedicineAmsterdam UMCVrije Universiteit AmsterdamAmsterdamthe Netherlands
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17
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Migotto MA, Mardon K, Orian J, Weckbecker G, Kneuer R, Bhalla R, Reutens DC. Efficient Distribution of a Novel Zirconium-89 Labeled Anti-cd20 Antibody Following Subcutaneous and Intravenous Administration in Control and Experimental Autoimmune Encephalomyelitis-Variant Mice. Front Immunol 2019; 10:2437. [PMID: 31681317 PMCID: PMC6813232 DOI: 10.3389/fimmu.2019.02437] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Accepted: 09/30/2019] [Indexed: 11/13/2022] Open
Abstract
Objective: To investigate the imaging and biodistribution of a novel zirconium-89 (89Zr)-labeled mouse anti-cd20 monoclonal antibody (mAb) in control and experimental autoimmune encephalomyelitis (EAE) mice following subcutaneous (s. c.) and intravenous (i.v.) administration. Background: Anti-cd20-mediated B-cell depletion using mAbs is a promising therapy for multiple sclerosis. Recombinant human myelin oligodendrocyte glycoprotein (rhMOG)-induced EAE involves B-cell-mediated inflammation and demyelination in mice. Design/Methods: C57BL/6J mice (n = 39) were EAE-induced using rhMOG. On Day 14 post EAE induction, 89Zr-labeled-anti-cd20 mAb was injected in control and EAE mice in the right lower flank (s.c.) or tail vein (i.v.). Positron emission tomography/computed tomography (PET/CT) imaging and gamma counting (ex vivo) were performed on Days 1, 3, and 7 to quantify tracer accumulation in the major organs, lymphatics, and central nervous system (CNS). A preliminary study was conducted in healthy mice to elucidate full and early kinetics of the tracer that were subsequently applied in the EAE and control mice study. Results:89Zr-labeled anti-cd20 mAb was effectively absorbed from s.c. and i.v. injection sites and distributed to all major organs in the EAE and control mice. There was a good correlation between in vivo PET/CT data and ex vivo quantification of biodistribution of the tracer. From gamma counting studies, initial tracer uptake within the lymphatic system was found to be higher in the draining lymph nodes (inguinal or subiliac and sciatic) following s.c. vs. i.v. administration; within the CNS a significantly higher tracer uptake was observed at 24 h in the cerebellum, cerebrum, and thoracic spinal cord (p < 0.05 for all) following s.c. vs. i.v. administration. Conclusions: The preclinical data suggest that initial tracer uptake was significantly higher in the draining lymph nodes (subiliac and sciatic) and parts of CNS (the cerebellum and cerebrum) when administered s.c. compared with i.v in EAE mice.
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Affiliation(s)
- Mary-Anne Migotto
- Centre for Advanced Imaging, The University of Queensland, Brisbane, QLD, Australia
| | - Karine Mardon
- Centre for Advanced Imaging, The University of Queensland, Brisbane, QLD, Australia.,National Imaging Facility, The University of Queensland, Brisbane, QLD, Australia
| | - Jacqueline Orian
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC, Australia
| | - Gisbert Weckbecker
- Novartis Institutes for BioMedical Research, Novartis Pharma AG, Basel, Switzerland
| | - Rainer Kneuer
- Novartis Institutes for BioMedical Research, Novartis Pharma AG, Basel, Switzerland
| | - Rajiv Bhalla
- Centre for Advanced Imaging, The University of Queensland, Brisbane, QLD, Australia.,ARC Training Centre for Innovation in Biomedical Imaging Technology, Brisbane, QLD, Australia
| | - David C Reutens
- Centre for Advanced Imaging, The University of Queensland, Brisbane, QLD, Australia.,ARC Training Centre for Innovation in Biomedical Imaging Technology, Brisbane, QLD, Australia
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18
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Abstract
A major obstacle to HIV eradication is the presence of infected cells that persist despite suppressive antiretroviral therapy (ART). HIV largely resides outside of the peripheral circulation, and thus, numerous anatomical and lymphoid compartments that have the capacity to harbor HIV are inaccessible to routine sampling. As a result, there is a limited understanding of the tissue burden of HIV infection or anatomical distribution of HIV transcriptional and translational activity. Novel, non-invasive, in vivo methods are urgently needed to address this fundamental gap in knowledge. In this review, we discuss past and current nuclear imaging approaches that have been applied to HIV infection with an emphasis on current strategies to implement positron emission tomography (PET)-based imaging to directly visualize and characterize whole-body HIV burden. These imaging approaches have various limitations, such as the potential for limited PET sensitivity and specificity in the setting of ART suppression or low viral burden. However, recent advances in high-sensitivity, total-body PET imaging platforms and development of new radiotracer technologies that may enhance anatomical penetration of target-specific tracer molecules are discussed. Potential strategies to image non-viral markers of HIV tissue burden or focal immune perturbation are also addressed. Overall, emerging nuclear imaging techniques and platforms may play an important role in the development of novel therapeutic and HIV reservoir eradication strategies.
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Affiliation(s)
- Timothy J Henrich
- Division of Experimental Medicine, Department of Medicine, University of San Francisco, San Francisco, CA, United States
| | - Priscilla Y Hsue
- Division of Cardiology, Department of Medicine, University of San Francisco, San Francisco, CA, United States
| | - Henry VanBrocklin
- Radiopharmaceutical Research Program, Center for Molecular and Functional Imaging, University of San Francisco, San Francisco, CA, United States
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19
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Benvenutto A, Giusiano B, Koric L, Gueriot C, Didic M, Felician O, Guye M, Guedj E, Ceccaldi M. Imaging Biomarkers of Neurodegeneration in Alzheimer's Disease: Distinct Contributions of Cortical MRI Atrophy and FDG-PET Hypometabolism. J Alzheimers Dis 2019; 65:1147-1157. [PMID: 30124446 DOI: 10.3233/jad-180292] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
BACKGROUND Neurodegeneration biomarkers are routinely used in the diagnosis of Alzheimer's disease (AD). OBJECTIVE To evaluate the respective contributions of two neuroimaging biomarkers, structural MRI and 18FDG-PET, in the assessment of neurodegeneration in AD dementia. METHODS Patients with mild AD dementia diagnosed based on clinical and cerebrospinal fluid criteria and cognitively healthy subjects, from the Marseille cohort ADAge with cognitive, structural MRI and 18FDG-PET assessments, were included. Extent of atrophy on MRI and of hypometabolism on 18FDG-PET were individually evaluated in each patient using a voxel-based analysis on whole-brain approach and compared to healthy subjects. Patients were divided in distinct groups according to their atrophy extent on the one hand and to their hypometabolism extent on the other, then, to their imaging profile combining the extent of the two biomarkers. RESULTS Fifty-two patients were included. The MMSE score was significantly lower in the "Extensive hypometabolism" group than in the "Limited hypometabolism" group (respectively 19.5/30 versus 23/30). A lower Innotest Amyloid Tau Index was associated with an extensive hypometabolism (p = 0.04). There were more patients with low educational level in the "Extensive atrophy" group, while a higher educational level was more found in the "Limited atrophy" group (p = 0.005). CONCLUSION 18FDG-PET hypometabolism extent is associated with the pathological processes and clinical severity of AD, while MRI atrophy seems to be influenced by the cognitive reserve. In the context of mild AD dementia, these two biomarkers of neurodegeneration are thus not interchangeable and require to be considered in combination rather than in isolation.
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Affiliation(s)
- Agnès Benvenutto
- Neurology and Neuropsychology Department and CMMR PACA Ouest, Assistance Publique-Hôpitaux de Marseille, Marseille, France
| | - Bernard Giusiano
- Department of Public Health, Assistance Publique-Hôpitaux de Marseille, Marseille, France.,Institut de Neurosciences des Systèmes, Aix-Marseille Univ, INSERM UMR 1106, Marseille, France
| | - Lejla Koric
- Neurology and Neuropsychology Department and CMMR PACA Ouest, Assistance Publique-Hôpitaux de Marseille, Marseille, France.,Aix Marseille Univ, CNRS, Centrale Marseille, Institut Fresnel, Marseille, France
| | - Claude Gueriot
- Neurology and Neuropsychology Department and CMMR PACA Ouest, Assistance Publique-Hôpitaux de Marseille, Marseille, France
| | - Mira Didic
- Neurology and Neuropsychology Department and CMMR PACA Ouest, Assistance Publique-Hôpitaux de Marseille, Marseille, France.,Institut de Neurosciences des Systèmes, Aix-Marseille Univ, INSERM UMR 1106, Marseille, France
| | - Olivier Felician
- Neurology and Neuropsychology Department and CMMR PACA Ouest, Assistance Publique-Hôpitaux de Marseille, Marseille, France.,Institut de Neurosciences des Systèmes, Aix-Marseille Univ, INSERM UMR 1106, Marseille, France
| | - Maxime Guye
- Aix Marseille Univ, CNRS, CRMBM, Marseille, France.,AP-HM, Timone University Hospital, CEMEREM, Marseille, France
| | - Eric Guedj
- Aix Marseille Univ, CNRS, Centrale Marseille, Institut Fresnel, Marseille, France.,Department of Nuclear Medecine, Assistance Publique-Hôpitaux de Marseille, Marseille, France.,CERIMED, Aix-Marseille Univ, Marseille, France
| | - Mathieu Ceccaldi
- Neurology and Neuropsychology Department and CMMR PACA Ouest, Assistance Publique-Hôpitaux de Marseille, Marseille, France.,Institut de Neurosciences des Systèmes, Aix-Marseille Univ, INSERM UMR 1106, Marseille, France
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20
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Smith CT, Crawford JL, Dang LC, Seaman KL, San Juan MD, Vijay A, Katz DT, Matuskey D, Cowan RL, Morris ED, Zald DH, Samanez-Larkin GR. Partial-volume correction increases estimated dopamine D2-like receptor binding potential and reduces adult age differences. J Cereb Blood Flow Metab 2019; 39:822-833. [PMID: 29090626 PMCID: PMC6498753 DOI: 10.1177/0271678x17737693] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The relatively modest spatial resolution of positron emission tomography (PET) increases the likelihood of partial volume effects such that binding potential (BPND) may be underestimated. Given structural grey matter losses across adulthood, partial volume effects may be even more problematic in older age leading to overestimation of adult age differences. Here we examined the effects of partial volume correction (PVC) in two studies from different sites using different high-affinity D2-like radioligands (18 F-Fallypride, 11C-FLB457) and different PET camera resolutions (∼5 mm, 2.5 mm). Results across both data sets revealed that PVC increased estimated BPND and reduced, though did not eliminate, age effects on BPND. As expected, the effects of PVC were smaller in higher compared to lower resolution data. Analyses using uncorrected data that controlled for grey matter volume in each region of interest approximated PVC corrected data for some but not all regions. Overall, the findings suggest that PVC increases estimated BPND in general and reduces adult age differences especially when using lower resolution cameras. The findings suggest that the past 30 years of research on dopamine receptor availability, for which very few studies use PVC, may overestimate effects of aging on dopamine receptor availability.
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Affiliation(s)
| | - Jennifer L Crawford
- 2 Department of Psychology, Yale University, New Haven, CT, USA.,3 Center for Cognitive Neuroscience, Duke University, Durham, NC, USA
| | - Linh C Dang
- 1 Department of Psychology, Vanderbilt University, Nashville, TN, USA
| | - Kendra L Seaman
- 2 Department of Psychology, Yale University, New Haven, CT, USA.,3 Center for Cognitive Neuroscience, Duke University, Durham, NC, USA
| | - M Danica San Juan
- 1 Department of Psychology, Vanderbilt University, Nashville, TN, USA
| | - Aishwarya Vijay
- 4 Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT, USA
| | - Daniel T Katz
- 1 Department of Psychology, Vanderbilt University, Nashville, TN, USA
| | - David Matuskey
- 4 Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT, USA.,5 Department of Psychiatry, Yale University, New Haven, CT, USA
| | - Ronald L Cowan
- 1 Department of Psychology, Vanderbilt University, Nashville, TN, USA.,6 Department of Psychiatry and Behavioral Sciences, Vanderbilt University School of Medicine, Nashville, TN, USA.,7 Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Evan D Morris
- 4 Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT, USA.,5 Department of Psychiatry, Yale University, New Haven, CT, USA.,8 Department of Biomedical Engineering, Yale University, New Haven, CT USA
| | - David H Zald
- 1 Department of Psychology, Vanderbilt University, Nashville, TN, USA.,6 Department of Psychiatry and Behavioral Sciences, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Gregory R Samanez-Larkin
- 2 Department of Psychology, Yale University, New Haven, CT, USA.,3 Center for Cognitive Neuroscience, Duke University, Durham, NC, USA.,9 Department of Psychology and Neuroscience, Duke University, Durham, NC, USA
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21
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Seaman KL, Smith CT, Juarez EJ, Dang LC, Castrellon JJ, Burgess LL, San Juan MD, Kundzicz PM, Cowan RL, Zald DH, Samanez-Larkin GR. Differential regional decline in dopamine receptor availability across adulthood: Linear and nonlinear effects of age. Hum Brain Mapp 2019; 40:3125-3138. [PMID: 30932295 DOI: 10.1002/hbm.24585] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 03/06/2019] [Accepted: 03/19/2019] [Indexed: 01/25/2023] Open
Abstract
Theories of adult brain development, based on neuropsychological test results and structural neuroimaging, suggest differential rates of age-related change in function across cortical and subcortical sub-regions. However, it remains unclear if these trends also extend to the aging dopamine system. Here we examined cross-sectional adult age differences in estimates of D2-like receptor binding potential across several cortical and subcortical brain regions using PET imaging and the radiotracer [18 F]Fallypride in two samples of healthy human adults (combined N = 132). After accounting for regional differences in overall radioligand binding, estimated percent difference in receptor binding potential by decade (linear effects) were highest in most temporal and frontal cortical regions (~6-16% per decade), moderate in parahippocampal gyrus, pregenual frontal cortex, fusiform gyrus, caudate, putamen, thalamus, and amygdala (~3-5%), and weakest in subcallosal frontal cortex, ventral striatum, pallidum, and hippocampus (~0-2%). Some regions showed linear effects of age while many showed curvilinear effects such that binding potential declined from young adulthood to middle age and then was relatively stable until old age. Overall, these data indicate that the rate and pattern of decline in D2 receptor availability is regionally heterogeneous. However, the differences across regions were challenging to organize within existing theories of brain development and did not show the same pattern of regional change that has been observed in gray matter volume, white matter integrity, or cognitive performance. This variation suggests that existing theories of adult brain development may need to be modified to better account for the spatial dynamics of dopaminergic system aging.
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Affiliation(s)
- Kendra L Seaman
- Center for the Study of Aging and Human Development, Duke University, Durham, North Carolina.,Center for Cognitive Neuroscience, Duke University, Durham, North Carolina
| | | | - Eric J Juarez
- Department of Psychology and Neuroscience, Duke University, Durham, North Carolina
| | - Linh C Dang
- Department of Psychology, Vanderbilt University, Nashville, Tennessee
| | - Jaime J Castrellon
- Department of Psychology and Neuroscience, Duke University, Durham, North Carolina
| | - Leah L Burgess
- Department of Psychology, Vanderbilt University, Nashville, Tennessee
| | - M Danica San Juan
- Department of Psychology, Vanderbilt University, Nashville, Tennessee
| | - Paul M Kundzicz
- Department of Psychology, Vanderbilt University, Nashville, Tennessee
| | - Ronald L Cowan
- Department of Psychology, Vanderbilt University, Nashville, Tennessee
| | - David H Zald
- Department of Psychology, Vanderbilt University, Nashville, Tennessee
| | - Gregory R Samanez-Larkin
- Center for Cognitive Neuroscience, Duke University, Durham, North Carolina.,Department of Psychology and Neuroscience, Duke University, Durham, North Carolina
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22
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Yang X, Zhu H, Yang X, Li N, Huang H, Liu T, Guo X, Xu X, Xia L, Deng C, Tian X, Yang Z. Targeting CAIX with [ 64Cu]XYIMSR-06 Small Molecular Radiotracer Enables Noninvasive PET Imaging of Malignant Glioma in U87 MG Tumor Cell Xenograft Mice. Mol Pharm 2019; 16:1532-1540. [PMID: 30803240 DOI: 10.1021/acs.molpharmaceut.8b01210] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Carbonic anhydrase IX (CAIX) plays an important role in glioma cell proliferation, invasion, metastasis, and resistance to radiotherapy and chemotherapy. An effective and noninvasive PET molecular imaging agent targeting CAIX would help its diagnosis and treatment but is not currently available. Recently, a low-molecular-weight (LMW) CAIX targeting agent, [64Cu]XYIMSR-06, was reported to have significantly improved properties for targeting clear cell renal cell carcinoma (ccRCC). We are encouraged to investigate the feasibility of adapting this agent for the diagnosis and treatment of CAIX-overexpressing malignant glioma. In vitro cell uptake and binding affinity assays were used to verify the binding capacity of [64Cu]XYIMSR-06 to U87 MG tumor cells in which CAIX overexpression was confirmed. The U87 MG tumor-bearing mouse (in situ and subcutaneous) model was built, and mice were injected with the radiotracer and/or coinjected with acetazolamide (0.2 g/kg) as a blocking agent for noninvasive micro-PET imaging. Micro-PET imaging was performed at 2, 4, and 8 h postinjection. ROI (region of interest)-based semiquantification was performed in an orthotopic glioma tumor model. Biodistribution throughout each organ was performed at 2, 4, 4 h block, 8, and 24 h postinjection. Hematoxylin and eosin (HE) staining and immunofluorescence or immunohistochemistry (IF/IHC) staining were implemented postimaging to assess the expression of CAIX in tumor organs. In vitro, [64Cu]XYIMSR-06 exhibits greater uptake in glioma cells (high CAIX expression) than in HCT116 cells (low CAIX expression). The binding affinity of [64Cu]XYIMSR-06 to U87 MG cell lines reaches up to 4.22 nM. Both orthotopic and subcutaneous tumors were clearly visualized at 2-8 h postinjection. Biodistribution studies demonstrated a maximum tumor uptake of 3.13% ID/g at 4 h postinjection, and the tumor to brain ratio (T/brain) was 6.51 at 8 h postinjection. The ROI-based T/brain values were 7.03 and 5.46 at 2 and 8 h postinjection, respectively. Histopathological analysis confirmed the overexpression of CAIX in gliomas, and the area of CAIX-positive IF staining is extremely consistent with the morphology on micro-PET imaging. In this study, [64Cu]XYIMSR-06 demonstrated specific accumulation in CAIX-expressing U87 MG glioma tumors, indicating that the radiotracer has the potential for noninvasively monitoring and guiding personalized treatment of malignant glioma and other tumors overexpressing CAIX.
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Affiliation(s)
- Xianteng Yang
- Guizhou University School of Medicine , Guiyang , Guizhou 550025 , China.,Department of Orthopaedics , People's Hospital of Guizhou Province , Guiyang , Guizhou 550002 , China
| | - Hua Zhu
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Nuclear Medicine , Peking University Cancer Hospital & Institute , Beijing 100142 , China
| | - Xing Yang
- Department of Nuclear Medicine , Peking University First Hospital , Beijing 100034 , China
| | - Nan Li
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Nuclear Medicine , Peking University Cancer Hospital & Institute , Beijing 100142 , China
| | - Haifeng Huang
- Guizhou University School of Medicine , Guiyang , Guizhou 550025 , China.,Department of Orthopaedics , People's Hospital of Guizhou Province , Guiyang , Guizhou 550002 , China
| | - Teli Liu
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Nuclear Medicine , Peking University Cancer Hospital & Institute , Beijing 100142 , China
| | - Xiaoyi Guo
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Nuclear Medicine , Peking University Cancer Hospital & Institute , Beijing 100142 , China
| | - Xiaoxia Xu
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Nuclear Medicine , Peking University Cancer Hospital & Institute , Beijing 100142 , China
| | - Lei Xia
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Nuclear Medicine , Peking University Cancer Hospital & Institute , Beijing 100142 , China
| | - Chaoyong Deng
- Guizhou University School of Medicine , Guiyang , Guizhou 550025 , China
| | - Xiaobin Tian
- Guizhou Medical University , Guiyang , Guizhou 550004 , China
| | - Zhi Yang
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Nuclear Medicine , Peking University Cancer Hospital & Institute , Beijing 100142 , China
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23
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Kopschina Feltes P, de Vries EFJ, Juarez-Orozco LE, Kurtys E, Dierckx RAJO, Moriguchi-Jeckel CM, Doorduin J. Repeated social defeat induces transient glial activation and brain hypometabolism: A positron emission tomography imaging study. J Cereb Blood Flow Metab 2019; 39:439-453. [PMID: 29271288 PMCID: PMC6399731 DOI: 10.1177/0271678x17747189] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Revised: 10/25/2017] [Accepted: 11/08/2017] [Indexed: 01/22/2023]
Abstract
Psychosocial stress is a risk factor for the development of depression. Recent evidence suggests that glial activation could contribute to the development of depressive-like behaviour. This study aimed to evaluate in vivo whether repeated social defeat (RSD) induces short- and long-term inflammatory and metabolic alterations in the brain through positron emission tomography (PET). Male Wistar rats ( n = 40) were exposed to RSD by dominant Long-Evans rats on five consecutive days. Behavioural and biochemical alterations were assessed at baseline, day 5/6 and day 24/25 after the RSD protocol. Glial activation (11C-PK11195 PET) and changes in brain metabolism (18F-FDG PET) were evaluated on day 6, 11 and 25 (short-term), and at 3 and 6 months (long-term). Defeated rats showed transient depressive- and anxiety-like behaviour, increased corticosterone and brain IL-1β levels, as well as glial activation and brain hypometabolism in the first month after RSD. During the third- and six-month follow-up, no between-group differences in any investigated parameter were found. Therefore, non-invasive PET imaging demonstrated that RSD induces transient glial activation and reduces brain glucose metabolism in rats. These imaging findings were associated with stress-induced behavioural changes and support the hypothesis that neuroinflammation could be a contributing factor in the development of depression.
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Affiliation(s)
- Paula Kopschina Feltes
- Department of Nuclear Medicine and
Molecular Imaging, University of Groningen, University Medical Center Groningen,
Groningen, the Netherlands
- Biomedical Gerontology, Pontifical
Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
- Brain Institute of Rio Grande do Sul
(BraIns), Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre,
Brazil
| | - Erik FJ de Vries
- Department of Nuclear Medicine and
Molecular Imaging, University of Groningen, University Medical Center Groningen,
Groningen, the Netherlands
| | - Luis E Juarez-Orozco
- Department of Nuclear Medicine and
Molecular Imaging, University of Groningen, University Medical Center Groningen,
Groningen, the Netherlands
| | - Ewelina Kurtys
- Department of Nuclear Medicine and
Molecular Imaging, University of Groningen, University Medical Center Groningen,
Groningen, the Netherlands
| | - Rudi AJO Dierckx
- Department of Nuclear Medicine and
Molecular Imaging, University of Groningen, University Medical Center Groningen,
Groningen, the Netherlands
| | - Cristina M Moriguchi-Jeckel
- Biomedical Gerontology, Pontifical
Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
- Brain Institute of Rio Grande do Sul
(BraIns), Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre,
Brazil
| | - Janine Doorduin
- Department of Nuclear Medicine and
Molecular Imaging, University of Groningen, University Medical Center Groningen,
Groningen, the Netherlands
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24
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Zhuang M, García DV, Kramer GM, Frings V, Smit EF, Dierckx R, Hoekstra OS, Boellaard R. Variability and Repeatability of Quantitative Uptake Metrics in 18F-FDG PET/CT of Non-Small Cell Lung Cancer: Impact of Segmentation Method, Uptake Interval, and Reconstruction Protocol. J Nucl Med 2018; 60:600-607. [PMID: 30389824 DOI: 10.2967/jnumed.118.216028] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 09/24/2018] [Indexed: 12/11/2022] Open
Abstract
There is increased interest in various new quantitative uptake metrics beyond SUV in oncologic PET/CT studies. The purpose of this study was to investigate the variability and test-retest ratio (TRT) of metabolically active tumor volume (MATV) measurements and several other new quantitative metrics in non-small cell lung cancer using 18F-FDG PET/CT with different segmentation methods, user interactions, uptake intervals, and reconstruction protocols. Methods: Ten patients with advanced non-small cell lung cancer received 2 series of 2 whole-body 18F-FDG PET/CT scans at 60 min after injection and at 90 min after injection. PET data were reconstructed with 4 different protocols. Eight segmentation methods were applied to delineate lesions with and without a tumor mask. MATV, SUVmax, SUVmean, total lesion glycolysis, and intralesional heterogeneity features were derived. Variability and repeatability were evaluated using a generalized-estimating-equation statistical model with Bonferroni adjustment for multiple comparisons. The statistical model, including interaction between uptake interval and reconstruction protocol, was applied individually to the data obtained from each segmentation method. Results: Without masking, none of the segmentation methods could delineate all lesions correctly. MATV was affected by both uptake interval and reconstruction settings for most segmentation methods. Similar observations were obtained for the uptake metrics SUVmax, SUVmean, total lesion glycolysis, homogeneity, entropy, and zone percentage. No effect of uptake interval was observed on TRT metrics, whereas the reconstruction protocol affected the TRT of SUVmax Overall, segmentation methods showing poor quantitative performance in one condition showed better performance in other (combined) conditions. For some metrics, a clear statistical interaction was found between the segmentation method and both uptake interval and reconstruction protocol. Conclusion: All segmentation results need to be reviewed critically. MATV and other quantitative uptake metrics, as well as their TRT, depend on segmentation method, uptake interval, and reconstruction protocol. To obtain quantitative reliable metrics, with good TRT performance, the optimal segmentation method depends on local imaging procedure, the PET/CT system, or reconstruction protocol. Rigid harmonization of imaging procedure and PET/CT performance will be helpful in mitigating this variability.
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Affiliation(s)
- Mingzan Zhuang
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.,The Key Laboratory of Digital Signal and Image Processing of Guangdong Province, Shantou University, Shantou, China
| | - David Vállez García
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Gerbrand M Kramer
- Department of Radiology and Nuclear Medicine, VU University Medical Center, Amsterdam, The Netherlands; and
| | - Virginie Frings
- Department of Radiology and Nuclear Medicine, VU University Medical Center, Amsterdam, The Netherlands; and
| | - E F Smit
- Department of Pulmonary Disease, VU University Medical Center, Amsterdam, The Netherlands
| | - Rudi Dierckx
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Otto S Hoekstra
- Department of Radiology and Nuclear Medicine, VU University Medical Center, Amsterdam, The Netherlands; and
| | - Ronald Boellaard
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands .,Department of Radiology and Nuclear Medicine, VU University Medical Center, Amsterdam, The Netherlands; and
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25
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Shen S, Jiang D, Cheng L, Chao Y, Nie K, Dong Z, Kutyreff CJ, Engle JW, Huang P, Cai W, Liu Z. Renal-Clearable Ultrasmall Coordination Polymer Nanodots for Chelator-Free 64Cu-Labeling and Imaging-Guided Enhanced Radiotherapy of Cancer. ACS Nano 2017; 11:9103-9111. [PMID: 28853861 PMCID: PMC5617799 DOI: 10.1021/acsnano.7b03857] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Developing tumor-homing nanoparticles with integrated diagnostic and therapeutic functions, and meanwhile could be rapidly excreted from the body, would be of great interest to realize imaging-guided precision treatment of cancer. In this study, an ultrasmall coordination polymer nanodot (CPN) based on the coordination between tungsten ions (WVI) and gallic acid (W-GA) was developed via a simple method. After polyethylene glycol (PEG) modification, PEGylated W-GA (W-GA-PEG) CPNs with an ultrasmall hydrodynamic diameter of 5 nm were rather stable in various physiological solutions. Without the need of chelator molecules, W-GA-PEG CPNs could be efficiently labeled with radioisotope 64Cu2+, enabling positron emission tomography (PET) imaging, which reveals efficient tumor accumulation and rapid renal clearance of W-GA-PEG CPNs upon intravenous injection. Utilizing the radio-sensitizing function of tungsten with strong X-ray absorption, such W-GA-PEG CPNs were able to greatly enhance the efficacy of cancer radiotherapy in inhibiting the tumor growth. With fast clearance and little long-term body retention, those W-GA-PEG CPNs exhibited no appreciable in vivo toxicity. This study presents a type of CPNs with excellent imaging and therapeutic abilities as well as rapid renal clearance behavior, promising for further clinic translation.
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Affiliation(s)
- Sida Shen
- Institute of Functional Nano & Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China
| | - Dawei Jiang
- Departments of Radiology and Medical Physics, University of Wisconsin-Madison, Wisconsin 53705, United States
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen 518060, China
| | - Liang Cheng
- Institute of Functional Nano & Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China
| | - Yu Chao
- Institute of Functional Nano & Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China
| | - Kaiqi Nie
- Institute of Functional Nano & Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China
| | - Ziliang Dong
- Institute of Functional Nano & Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China
| | - Christopher J. Kutyreff
- Departments of Radiology and Medical Physics, University of Wisconsin-Madison, Wisconsin 53705, United States
| | - Jonathan W. Engle
- Departments of Radiology and Medical Physics, University of Wisconsin-Madison, Wisconsin 53705, United States
| | - Peng Huang
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen 518060, China
| | - Weibo Cai
- Departments of Radiology and Medical Physics, University of Wisconsin-Madison, Wisconsin 53705, United States
| | - Zhuang Liu
- Institute of Functional Nano & Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China
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26
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Mendes Coelho VC, Morita ME, Amorim BJ, Ramos CD, Yasuda CL, Tedeschi H, Ghizoni E, Cendes F. Automated Online Quantification Method for 18F-FDG Positron Emission Tomography/CT Improves Detection of the Epileptogenic Zone in Patients with Pharmacoresistant Epilepsy. Front Neurol 2017; 8:453. [PMID: 28919879 PMCID: PMC5585153 DOI: 10.3389/fneur.2017.00453] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Accepted: 08/15/2017] [Indexed: 12/02/2022] Open
Abstract
Aims To assess the validity of an online method to quantitatively evaluate cerebral hypometabolism in patients with pharmacoresistant focal epilepsy as a complement to the visual analysis of the 18F-FDG positron emission tomography (PET)/CT exam. Methods A total of 39 patients with pharmacoresistant epilepsy and probable focal cortical dysplasia [22 patients with frontal lobe epilepsy (FLE) and 17 with temporal lobe epilepsy (TLE)] underwent a presurgical evaluation including EEG, video-EEG, MRI, and 18F-FDG PET/CT. We conducted the automated quantification of their 18F-FDG PET/CT data and compared the results with those of the visual-PET analysis conducted by experienced nuclear medicine physicians. For each patient group, we calculated Cohen’s Kappa coefficient for the visual and quantitative analyses, as well as each method’s sensitivity, specificity, and positive and negative predictive values. Results For the TLE group, both the visual and quantitative analyses showed high agreement. Thus, although the quantitative analysis could be used as a complement, the visual analysis on its own was consistent and precise. For the FLE group, on the other hand, the visual analysis categorized almost half of the cases as normal, revealing very low agreement. For those patients, the quantitative analysis proved critical to identify the focal hypometabolism characteristic of the epileptogenic zone. Our results suggest that the quantitative analysis of 18F-FDG PET/CT data is critical for patients with extratemporal epilepsies, and especially those with subtle MRI findings. Furthermore, it can easily be used during the routine clinical evaluation of 18F-FDG PET/CT exams. Significance Our results show that quantification of 18F-FDG PET is an informative complementary method that can be added to the routine visual evaluation of patients with subtle lesions, particularly those in the frontal lobes.
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Affiliation(s)
| | - Marcia E Morita
- Neurology/Epilepsy, Unicamp - University of Campinas, Campinas, Brazil
| | - Barbara J Amorim
- Nuclear Medicine Department, Unicamp - University of Campinas, Campinas, Brazil
| | - Celso Darío Ramos
- Nuclear Medicine Department, Unicamp - University of Campinas, Campinas, Brazil
| | - Clarissa L Yasuda
- Neurology/Epilepsy, Unicamp - University of Campinas, Campinas, Brazil
| | - Helder Tedeschi
- Neurosurgery/Epilepsy, Unicamp - University of Campinas, Campinas, Brazil
| | - Enrico Ghizoni
- Neurosurgery/Epilepsy, Unicamp - University of Campinas, Campinas, Brazil
| | - Fernando Cendes
- Neurology/Epilepsy, Unicamp - University of Campinas, Campinas, Brazil
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Jaswal AP, Meena VK, Prakash S, Pandey A, Singh B, Mishra AK, Hazari PP. [ 68Ga]/[ 188Re] Complexed [CDTMP] Trans-1,2-Cyclohexyldinitrilotetraphosphonic Acid As a Theranostic Agent for Skeletal Metastases. Front Med (Lausanne) 2017. [PMID: 28649566 PMCID: PMC5465288 DOI: 10.3389/fmed.2017.00072] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Objective Metastasis of the osseous tissue is one of the frequent and severe aggravations as a result of several neoplastic conditions, such as metabolic disorders, infections, and cancer. The objective of this study was to evaluate the pertinence of [68Ga]-trans-1,2-cyclohexyldinitrilo tetramethylene phosphonic acid (CDTMP) as a potential bone imaging agent for positron emission tomography (PET) applications as well as to assess [188Re]-CDTMP for bone pain palliation in metastatic skeletal disorders. Methods 68Ga complex of CDTMP was prepared at 80°C at pH 3.5, and 188Re complex of CDTMP was prepared at room temperature. [68Ga]-CDTMP complex was investigated as PET tracer while the therapeutic efficacy was assessed for [188Re]-CDTMP. Labeling efficiency, biodistribution, myelotoxicity, and imaging studies were carried out for the complexes synthesized. Both PET and MicroPET imaging studies were performed for [68Ga]-CDTMP whereas SPECT acquisitions were acquired for [188Re]-CDTMP. Data were analyzed semiquantitatively for all the scintigraphic scans obtained. Results The radiolabeling efficiency was observed to be >70% for [68Ga]-CDTMP. High bone uptake of [68Ga]-CDTMP as compared to contralateral tissue was found in PET imaging in Balb/C mice and New Zealand rabbit; the similar result for bone uptake was correlated in the biodistribution study of the compound in BALB/c mice at different time intervals. Biodistribution experiments carried out in mice showed maximum uptake of 6.12 ± 1.22%ID/g at 45 min postinjection. For [188Re]-CDTMP, total skeletal uptake was 8.12 ± 1.11%ID/g observed at 1 h postinjection from biodistribution data. High renal uptake confirms renal route of excretion. A good hydroxyapatite binding too was seen for both the complexes. No evidence of destruction or adverse functioning of vital organs was observed for the 188Re complex. Conclusion [68Ga]-CDTMP complex can be used as a promising PET bone imaging agent and [188Re]-CDTMP as a surrogate moiety for therapeutic application. Owing to the short half-life of 68Ga (68 min), cyclotron-independent radiopharmacy, fast clearance, and rapid renal excretion as evidenced in preclinical animal models. Very low myelotoxicity and highly selective bone uptake prove the potential of [188Re]-CDTMP for therapeutic application.
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Affiliation(s)
- Ambika P Jaswal
- Division of Cyclotron and Radiopharmaceutical Sciences, Institute of Nuclear Medicine and Allied Sciences, Delhi, India
| | - Virendra K Meena
- Division of Cyclotron and Radiopharmaceutical Sciences, Institute of Nuclear Medicine and Allied Sciences, Delhi, India
| | - Surbhi Prakash
- Division of Cyclotron and Radiopharmaceutical Sciences, Institute of Nuclear Medicine and Allied Sciences, Delhi, India
| | - Ankita Pandey
- Division of Cyclotron and Radiopharmaceutical Sciences, Institute of Nuclear Medicine and Allied Sciences, Delhi, India
| | | | - Anil K Mishra
- Division of Cyclotron and Radiopharmaceutical Sciences, Institute of Nuclear Medicine and Allied Sciences, Delhi, India
| | - Puja P Hazari
- Division of Cyclotron and Radiopharmaceutical Sciences, Institute of Nuclear Medicine and Allied Sciences, Delhi, India
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Zhang T, Wu X, Cai H, Liang M, Fan C. [Primary study on fluro [ 19F] berberine derivative for human hepatocellular carcinoma targetting in vitro]. Sheng Wu Yi Xue Gong Cheng Xue Za Zhi 2017; 34:253-259. [PMID: 29745582 DOI: 10.7507/1001-5515.201604025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
[ 18F]HX-01, a Fluorine-18 labeled berberine derivative, is a potential positron emission tomography (PET) tumor imaging agent, while [ 19F]HX-01 is a nonradioactive reference substance with different energy state and has the same physical and chemical properties. In order to collect data for further study of [ 18F]HX-01 PET imaging of hepatocellular carcinoma in vivo, this study compared the uptake of [ 19F]HX-01 by human hepatocellular carcinoma and normal hepatocytes in vitro. The target compound, [ 19F]HX-01, was synthesized in one step using berberrubine and 3-fluoropropyl 4-methylbenzenesulfonate. Cellular uptake and localization of [ 19F]HX-01 were performed by a fluorescence microscope in human hepatocellular carcinoma HepG2, SMMC-7721 and human normal hepatocyte HL-7702. Cellular proliferation inhibition and cell cytotoxicity assay of the [ 19F]HX-01 were conducted using cell counting kit-8 (CCK-8) on HepG2, SMMC-7721 and HL-7702 cells. Fluorescent microscopy showed that the combining ability of [ 19F]HX-01 to the carcinoma SMMC-7721 and HepG2 was higher than that to the normal HL-7702. Cellular proliferation inhibition assay demonstrated that [ 19F]HX-01 leaded to a dose-dependent inhibition on SMMC-7721, HepG2, and HL-7702 proliferation. Cell cytotoxicity assay presented that the cytotoxicity of [ 19F]HX-01 to SMMC-7721 and HepG2 was obviously higher than that to HL-7702. This in vitro study showed that [ 19F]HX-01 had a higher selectivity on human hepatocellular carcinoma cells (SMMC-7721, HepG2) but has less toxicity to normal hepatocytes (HL-7702). This could set up the idea that the radioactive reference substance [ 18F]HX-01 may be worthy of further development as a potential molecular probe targeting human hepatocellular carcinoma using PET.
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Affiliation(s)
- Tong Zhang
- Department of Nuclear Medicine, West China Hospital, Sichuan University, Chengdu 610041, P.R.China
| | - Xiaoai Wu
- Department of Nuclear Medicine, West China Hospital, Sichuan University, Chengdu 610041, P.R.China
| | - Huawei Cai
- Department of Nuclear Medicine, West China Hospital, Sichuan University, Chengdu 610041, P.R.China
| | - Meng Liang
- Department of Nuclear Medicine, West China Hospital, Sichuan University, Chengdu 610041, P.R.China
| | - Chengzhong Fan
- Department of Nuclear Medicine, West China Hospital, Sichuan University, Chengdu 610041,
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Abe Y, Kimura N, Takahashi R, Gotou M, Mizukami K, Uchida H, Matsubara E. Relationship between cytokine levels in the cerebrospinal fluid and 11C-Pittsburgh compound B retention in patients with mild cognitive impairment. Geriatr Gerontol Int 2017; 17:1907-1913. [PMID: 28261965 DOI: 10.1111/ggi.12991] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2016] [Revised: 11/01/2016] [Accepted: 11/22/2016] [Indexed: 01/05/2023]
Abstract
AIM In the present study, we examined the relationship between cytokine levels in the cerebrospinal fluid (CSF) and 11 C-Pittsburgh compound B (PiB) retention in patients with mild cognitive impairment. METHODS A total of 33 participants (12 men and 21 women; mean age 76.5 years) with mild cognitive impairment underwent neuropsychological assessments, PiB positron emission tomography and analysis of cytokine levels in the CSF. The CSF levels of 48 cytokines and growth factors were measured using multiplex immunoassays. PiB retention was assessed based on a standardized uptake value ratio. Mild cognitive impairment participants were classified as PiB-positive and PiB-negative, with a cut-off level of 1.4. We compared the CSF cytokine levels and Alzheimer's disease biomarkers, including β-amyloid 1-42, total tau and tau phosphorylated at threonine 181, between the two subgroups, and evaluated the correlation between PiB retention or CSF Alzheimer's disease biomarkers and CSF cytokine levels. RESULTS Cytokine levels in the CSF did not differ between the two subgroups. Macrophage inflammatory protein-1β levels in the CSF significantly correlated with PiB retention only in the PiB-positive subgroup, whereas stem cell growth factor-β levels significantly correlated with PiB retention in the PiB-negative subgroup. Furthermore, stem cell growth factor-β levels significantly correlated with total tau and tau phosphorylated at threonine 181 levels in only the PiB-negative subgroup. CONCLUSION The present findings suggest that macrophage inflammatory protein-1β and stem cell growth factor-β are associated with chronic inflammatory processes accompanied by amyloid deposition or AD pathophysiology. Geriatr Gerontol Int 2017; 17: 1907-1913.
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Affiliation(s)
- Yoshitake Abe
- Department of Neurology, Oita University, Faculty of Medicine, Oita, Japan
| | - Noriyuki Kimura
- Department of Neurology, Oita University, Faculty of Medicine, Oita, Japan
| | - Ryuichi Takahashi
- Department of Neurology, Oita University, Faculty of Medicine, Oita, Japan.,Department of Neurology, Hyogo Prefectural Rehabilitation Hospital, Hyougo, Japan
| | - Megumi Gotou
- Department of Neurology, Oita University, Faculty of Medicine, Oita, Japan
| | - Ken Mizukami
- Department of Neurology, Oita University, Faculty of Medicine, Oita, Japan
| | - Hirotatsu Uchida
- Department of Neurology, Oita University, Faculty of Medicine, Oita, Japan
| | - Etsuro Matsubara
- Department of Neurology, Oita University, Faculty of Medicine, Oita, Japan
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Hankir MK, Patt M, Patt JTW, Becker GA, Rullmann M, Kranz M, Deuther-Conrad W, Schischke K, Seyfried F, Brust P, Hesse S, Sabri O, Krügel U, Fenske WK. Suppressed Fat Appetite after Roux-en-Y Gastric Bypass Surgery Associates with Reduced Brain μ-opioid Receptor Availability in Diet-Induced Obese Male Rats. Front Neurosci 2017; 10:620. [PMID: 28133443 PMCID: PMC5233681 DOI: 10.3389/fnins.2016.00620] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Accepted: 12/30/2016] [Indexed: 01/02/2023] Open
Abstract
Brain μ-opioid receptors (MORs) stimulate high-fat (HF) feeding and have been implicated in the distinct long term outcomes on body weight of bariatric surgery and dieting. Whether alterations in fat appetite specifically following these disparate weight loss interventions relate to changes in brain MOR signaling is unknown. To address this issue, diet-induced obese male rats underwent either Roux-en-Y gastric bypass (RYGB) or sham surgeries. Postoperatively, animals were placed on a two-choice diet consisting of low-fat (LF) and HF food and sham-operated rats were further split into ad libitum fed (Sham-LF/HF) and body weight-matched (Sham-BWM) to RYGB groups. An additional set of sham-operated rats always only on a LF diet (Sham-LF) served as lean controls, making four experimental groups in total. Corresponding to a stage of weight loss maintenance for RYGB rats, two-bottle fat preference tests in conjunction with small-animal positron emission tomography (PET) imaging studies with the selective MOR radioligand [11C]carfentanil were performed. Brains were subsequently collected and MOR protein levels in the hypothalamus, striatum, prefrontal cortex and orbitofrontal cortex were analyzed by Western Blot. We found that only the RYGB group presented with intervention-specific changes: having markedly suppressed intake and preference for high concentration fat emulsions, a widespread reduction in [11C]carfentanil binding potential (reflecting MOR availability) in various brain regions, and a downregulation of striatal and prefrontal MOR protein levels compared to the remaining groups. These findings suggest that the suppressed fat appetite caused by RYGB surgery is due to reduced brain MOR signaling, which may contribute to sustained weight loss unlike the case for dieting.
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Affiliation(s)
- Mohammed K Hankir
- Department of Medicine, Integrated Research and Treatment Centre for Adiposity Diseases, University of Leipzig Leipzig, Germany
| | - Marianne Patt
- Department of Nuclear Medicine, University of Leipzig Leipzig, Germany
| | - Jörg T W Patt
- Department of Nuclear Medicine, University of Leipzig Leipzig, Germany
| | - Georg A Becker
- Department of Nuclear Medicine, University of Leipzig Leipzig, Germany
| | - Michael Rullmann
- Department of Medicine, Integrated Research and Treatment Centre for Adiposity Diseases, University of LeipzigLeipzig, Germany; Department of Nuclear Medicine, University of LeipzigLeipzig, Germany
| | - Mathias Kranz
- Helmholtz-Zentrum Dresden-Rossendorf, Research Site Leipzig Leipzig, Germany
| | | | - Kristin Schischke
- Department of Medicine, Integrated Research and Treatment Centre for Adiposity Diseases, University of Leipzig Leipzig, Germany
| | - Florian Seyfried
- Department of General and Visceral, Vascular and Paediatric Surgery, University of Würzburg Würzburg, Germany
| | - Peter Brust
- Helmholtz-Zentrum Dresden-Rossendorf, Research Site Leipzig Leipzig, Germany
| | - Swen Hesse
- Department of Medicine, Integrated Research and Treatment Centre for Adiposity Diseases, University of LeipzigLeipzig, Germany; Department of Nuclear Medicine, University of LeipzigLeipzig, Germany
| | - Osama Sabri
- Department of Medicine, Integrated Research and Treatment Centre for Adiposity Diseases, University of LeipzigLeipzig, Germany; Department of Nuclear Medicine, University of LeipzigLeipzig, Germany
| | - Ute Krügel
- Rudolf-Boehm Institute of Pharmacology and Toxicology, University of Leipzig Leipzig, Germany
| | - Wiebke K Fenske
- Department of Medicine, Integrated Research and Treatment Centre for Adiposity Diseases, University of Leipzig Leipzig, Germany
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Wangerin KA, Ahn S, Wollenweber S, Ross SG, Kinahan PE, Manjeshwar RM. Evaluation of lesion detectability in positron emission tomography when using a convergent penalized likelihood image reconstruction method. J Med Imaging (Bellingham) 2016; 4:011002. [PMID: 27921073 DOI: 10.1117/1.jmi.4.1.011002] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Accepted: 10/18/2016] [Indexed: 11/14/2022] Open
Abstract
We have previously developed a convergent penalized likelihood (PL) image reconstruction algorithm using the relative difference prior (RDP) and showed that it achieves more accurate lesion quantitation compared to ordered subsets expectation maximization (OSEM). We evaluated the detectability of low-contrast liver and lung lesions using the PL-RDP algorithm compared to OSEM. We performed a two-alternative forced choice study using a channelized Hotelling observer model that was previously validated against human observers. Lesion detectability showed a stronger dependence on lesion size for PL-RDP than OSEM. Lesion detectability was improved using time-of-flight (TOF) reconstruction, with greater benefit for the liver compared to the lung and with increasing benefit for decreasing lesion size and contrast. PL detectability was statistically significantly higher than OSEM for 20 mm liver lesions when contrast was [Formula: see text] ([Formula: see text]), and TOF PL detectability was statistically significantly higher than TOF OSEM for 15 and 20 mm liver lesions with contrast [Formula: see text] and [Formula: see text], respectively. For all other cases, there was no statistically significant difference between PL and OSEM ([Formula: see text]). For the range of studied lesion properties, lesion detectability using PL-RDP was equivalent or improved compared to using OSEM.
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Affiliation(s)
- Kristen A Wangerin
- General Electric Global Research Center, 1 Research Circle, Niskayuna, New York 12309, United States; University of Washington, Department of Bioengineering, 3720 15th Avenue NE, Seattle, Washington 98195, United States
| | - Sangtae Ahn
- General Electric Global Research Center , 1 Research Circle, Niskayuna, New York 12309, United States
| | - Scott Wollenweber
- General Electric Healthcare , 3000 North Grandview Boulevard, Waukesha, Wisconsin 53188, United States
| | - Steven G Ross
- General Electric Healthcare , 3000 North Grandview Boulevard, Waukesha, Wisconsin 53188, United States
| | - Paul E Kinahan
- University of Washington, Department of Bioengineering, 3720 15th Avenue NE, Seattle, Washington 98195, United States; University of Washington, Department of Radiology, 1959 NE Pacific Street, Seattle, Washington 98195, United States
| | - Ravindra M Manjeshwar
- General Electric Global Research Center , 1 Research Circle, Niskayuna, New York 12309, United States
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Sun T, Tang G, Tian H, Hu K, Yao S, Su Y, Wang C. Positron emission tomography imaging of cardiomyocyte apoptosis with a novel molecule probe [18F]FP-DPAZn2. Oncotarget 2016; 6:30579-91. [PMID: 26416423 PMCID: PMC4741553 DOI: 10.18632/oncotarget.5769] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2015] [Accepted: 09/12/2015] [Indexed: 01/13/2023] Open
Abstract
Cardiomyocyte apoptosis plays a causal role in the development and progression of heart failure. Currently, there is no effective imaging agent that can be used to detect cardiomyocyte apoptosis in vivo. To target phosphatidylserine (PS) on the surface of the dying cell, we synthesized a novel 18F-labeled Zn2+-dipicolylamine (DPA) analog, [18F]FP-DPAZn2, and evaluated it for noninvasive imaging of cardiomyocyte apoptosis. In vitro, the fluorescence imaging of dansyl-DPAZn2 was suitable for detecting cardiomyocyte apoptosis, which was confirmed by confocal immunofluorescence imaging, terminal dUTP nick-end labeling (TUNEL) assay, and western blot assay. The in vivo biodistribution showed that the uptake ratios of [18F]FP-DPAZn2 in the heart were 4.41±0.29% ID/g at 5 min, 2.40 ± 0.43% ID/g at 30 min, 1.63 ± 0.26% ID/g at 60 min, and 1.43% ± 0.07 ID/g at 120 min post-injection. In vivo, the [18F]FP-DPAZn2 PET images showed more cardiac accumulation of radioactivity 60 min post-injection in acute myocardial infarction (AMI) rats than in normal rats, which was consistent with the findings of a histological analysis of the rat cardiac tissues in vitro. [18F]FP-DPAZn2 PET imaging has the capability for myocardial apoptosis detection, but the method will require improved myocardial uptake for the noninvasive evaluation of cardiomyocyte apoptosis in clinical settings.
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Affiliation(s)
- Ting Sun
- Department of Cardiology, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, P.R. China
| | - Ganghua Tang
- Department of Nuclear Medicine, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, P.R. China
| | - Hua Tian
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute and Cancer Institute of Shanghai Jiao Tong University, Shanghai, P.R. China
| | - Kongzhen Hu
- Department of Nuclear Medicine, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, P.R. China
| | - Shaobo Yao
- Department of Nuclear Medicine, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, P.R. China
| | - Yifan Su
- Department of Cardiology, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, P.R. China
| | - Changqian Wang
- Department of Cardiology, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, P.R. China
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Simpson BN, Kim M, Chuang YF, Beason-Held L, Kitner-Triolo M, Kraut M, Lirette ST, Windham BG, Griswold ME, Legido-Quigley C, Thambisetty M. Blood metabolite markers of cognitive performance and brain function in aging. J Cereb Blood Flow Metab 2016; 36:1212-23. [PMID: 26661209 PMCID: PMC4929698 DOI: 10.1177/0271678x15611678] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Accepted: 09/10/2015] [Indexed: 12/15/2022]
Abstract
We recently showed that Alzheimer's disease patients have lower plasma concentrations of the phosphatidylcholines (PC16:0/20:5; PC16:0/22:6; and PC18:0/22:6) relative to healthy controls. We now extend these findings by examining associations between plasma concentrations of these PCs with cognition and brain function (measured by regional resting state cerebral blood flow; rCBF) in non-demented older individuals. Within the Baltimore Longitudinal Study of Aging neuroimaging substudy, participants underwent cognitive assessments and brain (15)O-water positron emission tomography. Plasma phosphatidylcholines concentrations (PC16:0/20:5, PC16:0/22:6, and PC18:0/22:6), cognition (California Verbal Learning Test (CVLT), Trail Making Test A&B, the Mini-Mental State Examination, Benton Visual Retention, Card Rotation, and Fluencies-Category and Letter), and rCBF were assessed. Lower plasma phosphatidylcholine concentrations were associated with lower baseline memory performance (CVLT long delay recall task-PC16:0/20:5: -2.17-1.39-0.60 p = 0.001 (β with 95% confidence interval subscripts)) and lower rCBF in several brain regions including those associated with memory performance and higher order cognitive processes. Our findings suggest that lower plasma concentrations of PC16:0/20:5, PC16:0/22:6, and PC18:0/22:6 are associated with poorer memory performance as well as widespread decreases in brain function during aging. Dysregulation of peripheral phosphatidylcholine metabolism may therefore be a common feature of both Alzheimer's disease and age-associated differences in cognition.
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Affiliation(s)
- Brittany N Simpson
- Clinical and Translational Neuroscience Unit, Laboratory of Behavioral Neuroscience, National Institute on Aging, National Institutes of Health, Baltimore, MD, USA School of Medicine, University of Mississippi Medical Center, Jackson, MS, USA
| | - Min Kim
- Institute of Pharmaceutical Science, King's College London, London, UK
| | - Yi-Fang Chuang
- Clinical and Translational Neuroscience Unit, Laboratory of Behavioral Neuroscience, National Institute on Aging, National Institutes of Health, Baltimore, MD, USA
| | - Lori Beason-Held
- Brain Aging and Behavior Section, National Institute on Aging, National Institutes of Health, Baltimore, MD, USA
| | - Melissa Kitner-Triolo
- Laboratory of Behavioral Neuroscience, National Institute on Aging, National Institutes of Health, Baltimore, MD, USA
| | - Michael Kraut
- Department of Radiology, Johns Hopkins Medical Institutions, Baltimore, MD, USA
| | - Seth T Lirette
- Center of Biostatistics and Bioinformatics, University of Mississippi Medical Center, Jackson, MS, USA
| | - B Gwen Windham
- Department of Medicine, Division of Geriatrics, University of Mississippi Medical Center, Jackson, MS, USA
| | - Michael E Griswold
- Department of Medicine, Division of Geriatrics, University of Mississippi Medical Center, Jackson, MS, USA
| | | | - Madhav Thambisetty
- Clinical and Translational Neuroscience Unit, Laboratory of Behavioral Neuroscience, National Institute on Aging, National Institutes of Health, Baltimore, MD, USA
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Mocciaro V, Scollo P, Stefano A, Gieri S, Russo G, Scibilia G, Cosentino S, Murè G, Baldari S, Sabini MG, Fraggetta F, Gilardi MC, Ippolito M. Correlation between histological grade and positron emission tomography parameters in cervical carcinoma. Oncol Lett 2016; 12:1408-1414. [PMID: 27446445 PMCID: PMC4950245 DOI: 10.3892/ol.2016.4771] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Accepted: 05/12/2016] [Indexed: 01/23/2023] Open
Abstract
The aim of the present study was to evaluate the changes in cervical cancer glucose metabolism for different levels of cellular differentiation. The metabolic activity was measured by standardized uptake value (SUV), SUV normalized to lean body mass, metabolic tumor volume and total lesion glycolysis using fluorine-18 fluorodeoxyglucose positron emission tomography (PET). A correlation study of these values could be used to facilitate therapeutic choice and to improve clinical practice and outcome. This study considered 32 patients with diagnosed cervical cancers, at different International Federation of Gynecology and Obstetrics stages. Glucose metabolism was assessed by PET examination, and histological specimens were examined to determine their initial grade of differentiation. A correlation study of these values was evaluated. Histological examination showed that all cases were of squamous cell carcinoma. Regarding the differentiation of the tumor, 19 well- to moderately-differentiated tumors and 13 poorly-differentiated tumors were determined. Negative findings for correlations between metabolic parameters and initial grade of histological differentiation were found, and considering that histological grade has been shown to have no consistent prognostic value in cervical cancer treatment, PET imaging could play a significant role in cervical cancer prognosis.
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Affiliation(s)
- Vanessa Mocciaro
- Institute of Molecular Bioimaging and Physiology, National Research Council, Cefalù, I-90015 Palermo, Italy
| | - Paolo Scollo
- Department of Gynecology, Cannizzaro Hospital, I-95126 Catania, Italy
| | - Alessandro Stefano
- Institute of Molecular Bioimaging and Physiology, National Research Council, Cefalù, I-90015 Palermo, Italy
| | - Stefania Gieri
- Institute of Molecular Bioimaging and Physiology, National Research Council, Cefalù, I-90015 Palermo, Italy
| | - Giorgio Russo
- Institute of Molecular Bioimaging and Physiology, National Research Council, Cefalù, I-90015 Palermo, Italy
| | - Giuseppe Scibilia
- Department of Gynecology, Cannizzaro Hospital, I-95126 Catania, Italy
| | | | - Gabriella Murè
- Department of Nuclear Medicine, Cannizzaro Hospital, I-95126 Catania, Italy
| | - Sara Baldari
- Department of Nuclear Medicine, Cannizzaro Hospital, I-95126 Catania, Italy
| | | | | | - Maria Carla Gilardi
- Institute of Molecular Bioimaging and Physiology, National Research Council, Cefalù, I-90015 Palermo, Italy
| | - Massimo Ippolito
- Department of Nuclear Medicine, Cannizzaro Hospital, I-95126 Catania, Italy
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Sarkar S, Das S. A Review of Imaging Methods for Prostate Cancer Detection. Biomed Eng Comput Biol 2016; 7:1-15. [PMID: 26966397 PMCID: PMC4777886 DOI: 10.4137/becb.s34255] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Revised: 01/07/2016] [Accepted: 01/11/2016] [Indexed: 12/21/2022] Open
Abstract
Imaging is playing an increasingly important role in the detection of prostate cancer (PCa). This review summarizes the key imaging modalities-multiparametric ultrasound (US), multiparametric magnetic resonance imaging (MRI), MRI-US fusion imaging, and positron emission tomography (PET) imaging-used in the diagnosis and localization of PCa. Emphasis is laid on the biological and functional characteristics of tumors that rationalize the use of a specific imaging technique. Changes to anatomical architecture of tissue can be detected by anatomical grayscale US and T2-weighted MRI. Tumors are known to progress through angiogenesis-a fact exploited by Doppler and contrast-enhanced US and dynamic contrast-enhanced MRI. The increased cellular density of tumors is targeted by elastography and diffusion-weighted MRI. PET imaging employs several different radionuclides to target the metabolic and cellular activities during tumor growth. Results from studies using these various imaging techniques are discussed and compared.
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Affiliation(s)
| | - Sudipta Das
- Department of Medicine, University of California, San Diego, CA, USA
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Awwad HO, Gonzalez LP, Tompkins P, Lerner M, Brackett DJ, Awasthi V, Standifer KM. Blast Overpressure Waves Induce Transient Anxiety and Regional Changes in Cerebral Glucose Metabolism and Delayed Hyperarousal in Rats. Front Neurol 2015; 6:132. [PMID: 26136722 PMCID: PMC4470265 DOI: 10.3389/fneur.2015.00132] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2015] [Accepted: 05/22/2015] [Indexed: 01/15/2023] Open
Abstract
Physiological alterations, anxiety, and cognitive disorders are strongly associated with blast-induced traumatic brain injury (blast TBI), and are common symptoms in service personnel exposed to blasts. Since 2006, 25,000–30,000 new TBI cases are diagnosed annually in U.S. Service members; increasing evidence confirms that primary blast exposure causes diffuse axonal injury and is often accompanied by altered behavioral outcomes. Behavioral and acute metabolic effects resulting from blast to the head in the absence of thoracic contributions from the periphery were examined, following a single blast wave directed to the head of male Sprague-Dawley rats protected by a lead shield over the torso. An 80 psi head blast produced cognitive deficits that were detected in working memory. Blast TBI rats displayed increased anxiety as determined by elevated plus maze at day 9 post-blast compared to sham rats; blast TBI rats spent significantly more time than the sham controls in the closed arms (p < 0.05; n = 8–11). Interestingly, anxiety symptoms were absent at days 22 and 48 post-blast. Instead, blast TBI rats displayed increased rearing behavior at day 48 post-blast compared to sham rats. Blast TBI rats also exhibited suppressed acoustic startle responses, but similar pre-pulse inhibition at day 15 post-blast compared to sham rats. Acute physiological alterations in cerebral glucose metabolism were determined by positron emission tomography 1 and 9 days post-blast using 18F-fluorodeoxyglucose (18F-FDG). Global glucose uptake in blast TBI rat brains increased at day 1 post-blast (p < 0.05; n = 4–6) and returned to sham levels by day 9. Our results indicate a transient increase in cerebral metabolism following a blast injury. Markers for reactive astrogliosis and neuronal damage were noted by immunoblotting motor cortex tissue from day 10 post-blast in blast TBI rats compared to sham controls (p < 0.05; n = 5–6).
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Affiliation(s)
- Hibah O Awwad
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Oklahoma Health Sciences Center , Oklahoma City, OK , USA ; Oklahoma Center for Neuroscience, College of Medicine, University of Oklahoma Health Sciences Center , Oklahoma City, OK , USA
| | - Larry P Gonzalez
- Oklahoma Center for Neuroscience, College of Medicine, University of Oklahoma Health Sciences Center , Oklahoma City, OK , USA ; Department of Psychiatry and Behavioral Sciences, College of Medicine, University of Oklahoma Health Sciences Center , Oklahoma City, OK , USA
| | - Paul Tompkins
- Department of Neurosurgery, College of Medicine, University of Oklahoma Health Sciences Center , Oklahoma City, OK , USA
| | - Megan Lerner
- Department of Surgery, College of Medicine, University of Oklahoma Health Sciences Center , Oklahoma City, OK , USA ; Oklahoma City VA Medical Center , Oklahoma City, OK , USA
| | - Daniel J Brackett
- Department of Surgery, College of Medicine, University of Oklahoma Health Sciences Center , Oklahoma City, OK , USA
| | - Vibhudutta Awasthi
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Oklahoma Health Sciences Center , Oklahoma City, OK , USA
| | - Kelly M Standifer
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Oklahoma Health Sciences Center , Oklahoma City, OK , USA ; Oklahoma Center for Neuroscience, College of Medicine, University of Oklahoma Health Sciences Center , Oklahoma City, OK , USA ; Department of Cell Biology, College of Medicine, University of Oklahoma Health Sciences Center , Oklahoma City, OK , USA
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Pifferi F, Dorieux O, Castellano CA, Croteau E, Masson M, Guillermier M, Van Camp N, Guesnet P, Alessandri JM, Cunnane S, Dhenain M, Aujard F. Long-chain n-3 PUFAs from fish oil enhance resting state brain glucose utilization and reduce anxiety in an adult nonhuman primate, the grey mouse lemur. J Lipid Res 2015; 56:1511-8. [PMID: 26063461 DOI: 10.1194/jlr.m058933] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Indexed: 12/23/2022] Open
Abstract
Decreased brain content of DHA, the most abundant long-chain n-3 polyunsaturated fatty acid (n-3 LCPUFA) in the brain, is accompanied by severe neurosensorial impairments linked to impaired neurotransmission and impaired brain glucose utilization. In the present study, we hypothesized that increasing n-3 LCPUFA intake at an early age may help to prevent or correct the glucose hypometabolism observed during aging and age-related cognitive decline. The effects of 12 months' supplementation with n-3 LCPUFA on brain glucose utilization assessed by positron emission tomography was tested in young adult mouse lemurs (Microcebus murinus). Cognitive function was tested in parallel in the same animals. Lemurs supplemented with n-3 LCPUFA had higher brain glucose uptake and cerebral metabolic rate of glucose compared with controls in all brain regions. The n-3 LCPUFA-supplemented animals also had higher exploratory activity in an open-field task and lower evidence of anxiety in the Barnes maze. Our results demonstrate for the first time in a nonhuman primate that n-3 LCPUFA supplementation increases brain glucose uptake and metabolism and concomitantly reduces anxiety.
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Affiliation(s)
- Fabien Pifferi
- Mécanismes Adaptatifs et Evolution, UMR 7179 CNRS-MNHN, Brunoy, France
| | - Olène Dorieux
- Mécanismes Adaptatifs et Evolution, UMR 7179 CNRS-MNHN, Brunoy, France CNRS, URA CEA CNRS 2210, Fontenay-aux-Roses, France
| | - Christian-Alexandre Castellano
- Research Center on Aging, Université de Sherbrooke, Sherbrooke, QC, Canada Department of Medicine, Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, QC, Canada
| | - Etienne Croteau
- Research Center on Aging, Université de Sherbrooke, Sherbrooke, QC, Canada Department of Medicine, Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, QC, Canada
| | - Marie Masson
- Mécanismes Adaptatifs et Evolution, UMR 7179 CNRS-MNHN, Brunoy, France
| | | | - Nadja Van Camp
- Research Center on Aging, Université de Sherbrooke, Sherbrooke, QC, Canada Department of Medicine, Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, QC, Canada
| | | | - Jean-Marc Alessandri
- Microbiologie de l'Alimentation au Service de la Santé Humaine, INRA de Jouy en Josas, Jouy en Josas Cedex, France
| | - Stephen Cunnane
- Research Center on Aging, Université de Sherbrooke, Sherbrooke, QC, Canada Department of Medicine, Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, QC, Canada
| | - Marc Dhenain
- CNRS, URA CEA CNRS 2210, Fontenay-aux-Roses, France
| | - Fabienne Aujard
- Mécanismes Adaptatifs et Evolution, UMR 7179 CNRS-MNHN, Brunoy, France
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38
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Gao F, Cai P, Yang W, Xue J, Gao L, Liu R, Wang Y, Zhao Y, He X, Zhao L, Huang G, Wu F, Zhao Y, Chai Z, Gao X. Ultrasmall [(64)Cu]Cu nanoclusters for targeting orthotopic lung tumors using accurate positron emission tomography imaging. ACS Nano 2015; 9:4976-4986. [PMID: 25919205 DOI: 10.1021/nn507130k] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Positron emission tomography (PET) imaging has received special attention owing to its higher sensitivity, temporal resolution, and unlimited tissue penetration. The development of tracers that target specific molecules is therefore essential for the development and utility of clinically relevant PET procedures. However, (64)Cu as a PET imaging agent generally has been introduced into biomaterials through macrocyclic chelators, which may lead to the misinterpretation of PET imaging results due to the detachment and transchelation of (64)Cu. In this study, we have developed ultrasmall chelator-free radioactive [(64)Cu]Cu nanoclusters using bovine serum albumin (BSA) as a scaffold for PET imaging in an orthotopic lung cancer model. We preconjugated the tumor target peptide luteinizing hormone releasing hormone (LHRH) to BSA molecules to prepare [(64)Cu]CuNC@BSA-LHRH. The prepared [(64)Cu]Cu nanoclusters showed high radiolabeling stability, ultrasmall size, and rapid deposition and diffusion into tumor, as well as predominantly renal clearance. [(64)Cu]CuNC@BSA-LHRH showed 4 times higher tumor uptake compared with that of [(64)Cu]CuNC@BSA by analyzing the (64)Cu radioactivity of tissues via gamma counting. The PET imaging using [(64)Cu]Cu nanoclusters as tracers showed more sensitive, accurate, and deep penetration imaging of orthotopic lung cancer in vivo compared with near-infrared fluorescence imaging. The nanoclusters provide biomedical research tools for PET molecular imaging.
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Affiliation(s)
| | - Pengju Cai
- ‡Affiliated Ruikang Hospital of Guangxi University of TCM, Nanning, Guangxi 530011, People's Republic of China
| | | | | | | | | | | | - Yawei Zhao
- ⊥School of Physics, Beijing Institute of Technology, Beijing 100081, People's Republic of China
| | | | | | - Guodong Huang
- ‡Affiliated Ruikang Hospital of Guangxi University of TCM, Nanning, Guangxi 530011, People's Republic of China
| | - Fasheng Wu
- ‡Affiliated Ruikang Hospital of Guangxi University of TCM, Nanning, Guangxi 530011, People's Republic of China
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Abstract
Sarcoidosis is a chronic granulomatous disease of unknown origin. There are several modalities for diagnosis, staging and therapeutic management of patients with sarcoidosis. Among these, whole-body F-18 fluorodeoxyglucose (FDG) positron emission tomography/computed tomography is found to useful in patients with complex and multisystem forms of sarcoidosis. Other modalities include Gallium scanning, assesment of angiotensin converting enzyme levels in blood, chest radiography, mediastinoscopy etcetera.
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Affiliation(s)
- Beth Vettiyil
- Radiology Research Fellow, Diagnostic Radiology, Massachusetts General Hospital, Boston 02114, USA
| | - Nikitha Gupta
- Department of Biology (Premed Student), New York University, New York 10012, USA
| | - Rajesh Kumar
- Department of Pharmacology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India
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40
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Fawaz M, Brooks AF, Rodnick ME, Carpenter GM, Shao X, Desmond TJ, Sherman P, Quesada CA, Hockley BG, Kilbourn MR, Albin RL, Frey KA, Scott PJH. High affinity radiopharmaceuticals based upon lansoprazole for PET imaging of aggregated tau in Alzheimer's disease and progressive supranuclear palsy: synthesis, preclinical evaluation, and lead selection. ACS Chem Neurosci 2014; 5:718-30. [PMID: 24896980 PMCID: PMC4140593 DOI: 10.1021/cn500103u] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2014] [Revised: 06/04/2014] [Indexed: 01/05/2023] Open
Abstract
Abnormally aggregated tau is the hallmark pathology of tauopathy neurodegenerative disorders and is a target for development of both diagnostic tools and therapeutic strategies across the tauopathy disease spectrum. Development of carbon-11- or fluorine-18-labeled radiotracers with appropriate affinity and specificity for tau would allow noninvasive quantification of tau burden using positron emission tomography (PET) imaging. We have synthesized [(18)F]lansoprazole, [(11)C]N-methyl lansoprazole, and [(18)F]N-methyl lansoprazole and identified them as high affinity radiotracers for tau with low to subnanomolar binding affinities. Herein, we report radiosyntheses and extensive preclinical evaluation with the aim of selecting a lead radiotracer for translation into human PET imaging trials. We demonstrate that [(18)F]N-methyl lansoprazole, on account of the favorable half-life of fluorine-18 and its rapid brain entry in nonhuman primates, favorable kinetics, low white matter binding, and selectivity for binding to tau over amyloid, is the lead compound for progression into clinical trials.
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Affiliation(s)
- Maria
V. Fawaz
- Division
of Nuclear Medicine, Department of Radiology, University of Michigan Medical School, Ann Arbor, Michigan 48109, United States
| | - Allen F. Brooks
- Division
of Nuclear Medicine, Department of Radiology, University of Michigan Medical School, Ann Arbor, Michigan 48109, United States
| | - Melissa E. Rodnick
- Division
of Nuclear Medicine, Department of Radiology, University of Michigan Medical School, Ann Arbor, Michigan 48109, United States
| | - Garrett M. Carpenter
- Division
of Nuclear Medicine, Department of Radiology, University of Michigan Medical School, Ann Arbor, Michigan 48109, United States
| | - Xia Shao
- Division
of Nuclear Medicine, Department of Radiology, University of Michigan Medical School, Ann Arbor, Michigan 48109, United States
| | - Timothy J. Desmond
- Division
of Nuclear Medicine, Department of Radiology, University of Michigan Medical School, Ann Arbor, Michigan 48109, United States
| | - Phillip Sherman
- Division
of Nuclear Medicine, Department of Radiology, University of Michigan Medical School, Ann Arbor, Michigan 48109, United States
| | - Carole A. Quesada
- Division
of Nuclear Medicine, Department of Radiology, University of Michigan Medical School, Ann Arbor, Michigan 48109, United States
| | - Brian G. Hockley
- Division
of Nuclear Medicine, Department of Radiology, University of Michigan Medical School, Ann Arbor, Michigan 48109, United States
| | - Michael R. Kilbourn
- Division
of Nuclear Medicine, Department of Radiology, University of Michigan Medical School, Ann Arbor, Michigan 48109, United States
| | - Roger L. Albin
- Geriatrics
Research, Education and Clinical Center, Veterans Affairs Ann Arbor Healthcare System, Ann Arbor, Michigan 48105, United States
- Department
of Neurology, The University of Michigan
Medical School, Ann Arbor, Michigan 48109, United States
- Michigan Alzheimer
Disease Center and The Interdepartmental Program in
Medicinal Chemistry, The University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Kirk A. Frey
- Division
of Nuclear Medicine, Department of Radiology, University of Michigan Medical School, Ann Arbor, Michigan 48109, United States
| | - Peter J. H. Scott
- Division
of Nuclear Medicine, Department of Radiology, University of Michigan Medical School, Ann Arbor, Michigan 48109, United States
- Michigan Alzheimer
Disease Center and The Interdepartmental Program in
Medicinal Chemistry, The University of Michigan, Ann Arbor, Michigan 48109, United States
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41
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Suridjan I, Rusjan PM, Kenk M, Verhoeff NPLG, Voineskos AN, Rotenberg D, Wilson AA, Meyer JH, Houle S, Mizrahi R. Quantitative imaging of neuroinflammation in human white matter: a positron emission tomography study with translocator protein 18 kDa radioligand, [18F]-FEPPA. Synapse 2014; 68:536-47. [PMID: 25043159 DOI: 10.1002/syn.21765] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Accepted: 06/25/2014] [Indexed: 11/06/2022]
Abstract
The ability to quantify translocator protein 18 kDa (TSPO) in white matter (WM) is important to understand the role of neuroinflammation in neurological disorders with WM involvement. This article aims to extend the utility of TSPO imaging in WM using a second-generation radioligand, [18F]-FEPPA, and high-resolution research tomograph (HRRT) positron emission tomography (PET) camera system. Four WM regions of interests (WM-ROI), relevant to the study of aging and neuroinflammatory diseases, were examined. The corpus callosum, cingulum bundle, superior longitudinal fasciculus, and posterior limb of internal capsule were delineated automatically onto subject's T1 -weighted magnetic resonance image using a diffusion tensor imaging-based WM template. The TSPO polymorphism (rs6971) stratified individuals to three genetic groups: high-affinity binders (HAB), mixed-affinity binders (MAB), and low-affinity binders. [18F]-FEPPA PET scans were acquired on 32 healthy subjects and analyzed using a full kinetic compartment analysis. The two-tissue compartment model showed moderate identifiability (coefficient of variation 15-19%) for [18F]-FEPPA total volume distribution (VT ) in WM-ROIs. Noise affects VT variability, although its effect on bias was small (6%). In a worst-case scenario, ≤6% of simulated data did not fit reliably. A simulation of increased TSPO density exposed minimal effect on variability and identifiability of [18F]-FEPPA VT in WM-ROIs. We found no association between age and [18F]-FEPPA VT in WM-ROIs. The VT values were 15% higher in HAB than in MAB, although the difference was not statistically significant. This study provides evidence for the utility and limitations of [18F]-FEPPA PET to measure TSPO expression in WM.
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Affiliation(s)
- Ivonne Suridjan
- Research Imaging Centre, Centre for Addiction and Mental Health, Toronto, Ontario, M5T 1R8, Canada; Institute of Medical Science, University of Toronto, Ontario, M5S 1A8, Canada
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42
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Qin Z, Hall DJ, Liss MA, Hoh CK, Kane CJ, Wallace AM, Vera DR. Optimization via specific fluorescence brightness of a receptor-targeted probe for optical imaging and positron emission tomography of sentinel lymph nodes. J Biomed Opt 2013; 18:101315. [PMID: 23958947 PMCID: PMC3745642 DOI: 10.1117/1.jbo.18.10.101315] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2013] [Revised: 06/05/2013] [Accepted: 06/27/2013] [Indexed: 05/20/2023]
Abstract
The optical properties of a receptor-targeted probe designed for dual-modality mapping of the sentinel lymph node (SLN) was optimized. Specific fluorescence brightness was used as the design criterion, which was defined as the fluorescence brightness per mole of the contrast agent. Adjusting the molar ratio of the coupling reactants, IRDye 800CW-NHS-ester and tilmanocept, enabled us to control the number of fluorescent molecules attached to each tilmanocept, which was quantified by H1 nuclear magnetic resonance spectroscopy. Quantum yields and molar absorptivities were measured for unconjugated IRDye 800CW and IRDye 800CW-tilmanocept (800CW-tilmanocept) preparations at 0.7, 1.5, 2.3, 2.9, and 3.8 dyes per tilmanocept. Specific fluorescence brightness was calculated by multiplication of the quantum yield by the molar absorptivity and the number of dyes per tilmanocept. It predicted that the preparation with 2.3 dyes per tilmanocept would exhibit the brightest signal, which was confirmed by fluorescence intensity measurements using three optical imaging systems. When radiolabeled with Ga68 and injected into the footpads of mice, the probe identified SLNs by both fluorescence and positron emission tomography (PET) while maintaining high percent extraction by the SLN. These studies demonstrated the feasibility of 800CW-tilmanocept for multimodal SLN mapping via fluorescence and PET-computed tomography imaging.
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Affiliation(s)
- Zhengtao Qin
- University of California, San Diego, Department of Chemistry, La Jolla, California 92093
- University of California, San Diego, Moores Cancer Center, La Jolla, California 92093
- University of California, San Diego, Department of Radiology, La Jolla, California 92093
- University of California, San Diego, In Vivo Cancer and Molecular Imaging Center, La Jolla, California 92093
| | - David J. Hall
- University of California, San Diego, Moores Cancer Center, La Jolla, California 92093
- University of California, San Diego, Department of Radiology, La Jolla, California 92093
- University of California, San Diego, In Vivo Cancer and Molecular Imaging Center, La Jolla, California 92093
| | - Michael A. Liss
- University of California, San Diego, Moores Cancer Center, La Jolla, California 92093
- University of California, San Diego, Department of Surgery, La Jolla, California 92093
| | - Carl K. Hoh
- University of California, San Diego, Moores Cancer Center, La Jolla, California 92093
- University of California, San Diego, Department of Radiology, La Jolla, California 92093
- University of California, San Diego, In Vivo Cancer and Molecular Imaging Center, La Jolla, California 92093
| | - Christopher J. Kane
- University of California, San Diego, Moores Cancer Center, La Jolla, California 92093
- University of California, San Diego, Department of Surgery, La Jolla, California 92093
| | - Anne M. Wallace
- University of California, San Diego, Moores Cancer Center, La Jolla, California 92093
- University of California, San Diego, Department of Surgery, La Jolla, California 92093
| | - David R. Vera
- University of California, San Diego, Moores Cancer Center, La Jolla, California 92093
- University of California, San Diego, Department of Radiology, La Jolla, California 92093
- University of California, San Diego, In Vivo Cancer and Molecular Imaging Center, La Jolla, California 92093
- University of California, San Diego, Department of Surgery, La Jolla, California 92093
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Shao X, Carpenter GM, Desmond TJ, Sherman P, Quesada CA, Fawaz M, Brooks AF, Kilbourn MR, Albin RL, Frey KA, Scott PJH. Evaluation of [(11)C]N-Methyl Lansoprazole as a Radiopharmaceutical for PET Imaging of Tau Neurofibrillary Tangles. ACS Med Chem Lett 2012; 3:936-41. [PMID: 24900410 DOI: 10.1021/ml300216t] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2012] [Accepted: 09/25/2012] [Indexed: 01/27/2023] Open
Abstract
[(11)C]N-Methyl lansoprazole ([(11)C]NML, 3) was synthesized and evaluated as a radiopharmaceutical for quantifying tau neurofibrillary tangle (NFT) burden using positron emission tomography (PET) imaging. [(11)C]NML was synthesized from commercially available lansoprazole in 4.6% radiochemical yield (noncorrected RCY, based upon [(11)C]MeI), 99% radiochemical purity, and 16095 Ci/mmol specific activity (n = 5). Log P was determined to be 2.18. A lack of brain uptake in rodent microPET imaging revealed [(11)C]NML to be a substrate for the rodent permeability-glycoprotein 1 (PGP) transporter, but this could be overcome by pretreating with cyclosporin A to block the PGP. Contrastingly, [(11)C]NML was not found to be a substrate for the primate PGP, and microPET imaging in rhesus revealed [(11)C]NML uptake in the healthy primate brain of ∼1600 nCi/cc maximum at 3 min followed by rapid egress to 500 nCi/cc. Comparative autoradiography between wild-type rats and transgenic rats expressing human tau (hTau +/+) revealed 12% higher uptake of [(11)C]NML in the cortex of brains expressing human tau. Further autoradiography with tau positive brain samples from progressive supranuclear palsy (PSP) patients revealed colocalization of [(11)C]NML with tau NFTs identified using modified Bielschowsky staining. Finally, saturation binding experiments with heparin-induced tau confirmed K d and Bmax values of [(11)C]NML as 700 pM and 0.214 fmol/μg, respectively.
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Affiliation(s)
- Xia Shao
- Division of Nuclear Medicine, Department of Radiology, The University of Michigan Medical School, Ann Arbor,
Michigan 48109, United States
| | - Garrett M. Carpenter
- Division of Nuclear Medicine, Department of Radiology, The University of Michigan Medical School, Ann Arbor,
Michigan 48109, United States
| | - Timothy J. Desmond
- Division of Nuclear Medicine, Department of Radiology, The University of Michigan Medical School, Ann Arbor,
Michigan 48109, United States
| | - Phillip Sherman
- Division of Nuclear Medicine, Department of Radiology, The University of Michigan Medical School, Ann Arbor,
Michigan 48109, United States
| | - Carole A. Quesada
- Division of Nuclear Medicine, Department of Radiology, The University of Michigan Medical School, Ann Arbor,
Michigan 48109, United States
| | - Maria Fawaz
- Division of Nuclear Medicine, Department of Radiology, The University of Michigan Medical School, Ann Arbor,
Michigan 48109, United States
| | - Allen F. Brooks
- Division of Nuclear Medicine, Department of Radiology, The University of Michigan Medical School, Ann Arbor,
Michigan 48109, United States
| | - Michael R. Kilbourn
- Division of Nuclear Medicine, Department of Radiology, The University of Michigan Medical School, Ann Arbor,
Michigan 48109, United States
| | - Roger L. Albin
- Geriatrics Research, Education, and Clinical Center, VAAAHS, Ann Arbor, Michigan 48105, United States
- Department of Neurology, The University of Michigan Medical School, Ann Arbor,
Michigan 48109, United States
| | - Kirk A. Frey
- Division of Nuclear Medicine, Department of Radiology, The University of Michigan Medical School, Ann Arbor,
Michigan 48109, United States
- Department of Neurology, The University of Michigan Medical School, Ann Arbor,
Michigan 48109, United States
| | - Peter J. H. Scott
- Division of Nuclear Medicine, Department of Radiology, The University of Michigan Medical School, Ann Arbor,
Michigan 48109, United States
- The Interdepartmental Program in Medicinal Chemistry, The University of Michigan, Ann Arbor, Michigan 48109,
United States
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44
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Ng JM, Azuma K, Kelley C, Pencek R, Radikova Z, Laymon C, Price J, Goodpaster BH, Kelley DE. PET imaging reveals distinctive roles for different regional adipose tissue depots in systemic glucose metabolism in nonobese humans. Am J Physiol Endocrinol Metab 2012; 303:E1134-41. [PMID: 22967498 PMCID: PMC3492855 DOI: 10.1152/ajpendo.00282.2012] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2012] [Accepted: 09/06/2012] [Indexed: 11/22/2022]
Abstract
Excess amounts of abdominal subcutaneous (SAT) and visceral (VAT) adipose tissue (AT) are associated with insulin resistance, even in normal-weight subjects. In contrast, gluteal-femoral AT (GFAT) is hypothesized to offer protection against insulin resistance. Dynamic PET imaging studies were undertaken to examine the contributions of both metabolic activity and size (volume) of these depots in systemic glucose metabolism. Nonobese, healthy volunteers (n = 15) underwent dynamic PET imaging uptake of [¹⁸F]FDG at a steady-state (20 mU·m⁻²·min⁻¹) insulin infusion. PET images of tissue [¹⁸F]FDG activity were coregistered with MRI to derive K values for insulin-stimulated rates of fractional glucose uptake within tissue. Adipose tissue volume was calculated from DEXA and MRI. VAT had significantly higher rates of fractional glucose uptake per volume than SAT (P < 0.05) or GFAT (P < 0.01). K(GFAT) correlated positively (r = 0.67, P < 0.01) with systemic insulin sensitivity [glucose disappearance rate (R(d))] and negatively with insulin-suppressed FFA (r = -0.71, P < 0.01). SAT (r = -0.70, P < 0.01) and VAT mass (r = -0.55, P < 0.05) correlated negatively with R(d), but GFAT mass did not. We conclude that rates of fractional glucose uptake within GFAT and VAT are significantly and positively associated with systemic insulin sensitivity in nonobese subjects. Furthermore, whereas SAT and VAT amounts are confirmed to relate to systemic insulin resistance, GFAT amount is not associated with insulin resistance. These dynamic PET imaging studies indicate that both quantity and quality of specific AT depots have distinct roles in systemic insulin resistance and may help explain the metabolically obese but normal-weight phenotype.
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Affiliation(s)
- Jason M Ng
- Division of Endocrinology and Metabolism, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
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45
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Abstract
Conventional reporter gene technology and histological methods cannot routinely be used to track the in vivo behavior of embryonic stem (ES) cells longitudinally after cellular transplantation. Here we describe a protocol for monitoring the in vivo survival, proliferation, and migration of ES cells without necessitating animal sacrifice. Stable ES cell lines containing double fusion (DF; enhanced green fluorescent protein and firefly luciferase) or triple fusion (TF; monomeric red fluorescent protein, firefly luciferase, and herpes simplex virus thymidine kinase) reporter genes can be established within 4-6 weeks by lentiviral transduction followed by fluorescence-activated cell sorting. The cell fate and behavior of these DF or TF ES cells can subsequently be tracked noninvasively by bioluminescence and microPET imaging for a prolonged period of time.
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Affiliation(s)
- Andrew Lee
- Molecular Imaging Program at Stanford (MIPS), Stanford University School of Medicine, Stanford, California 94305, USA
| | - Joseph C. Wu
- Molecular Imaging Program at Stanford (MIPS), Stanford University School of Medicine, Stanford, California 94305, USA
- Department of Medicine (Division of Cardiology), Stanford University School of Medicine, Stanford, California 94305, USA
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46
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Abstract
Positron emission tomography imaging was used to investigate the brain activation patterns of listeners presented monaurally (right ear) with speech and nonspeech stimuli. The major objectives were to identify regions involved with speech and nonspeech processing, and to develop a stimulus paradigm suitable for studies of cochlear-implant subjects. Scans were acquired under a silent condition and stimulus conditions that required listeners to press a response button to repeated words, sentences, time-reversed (TR) words, or TR sentences. Group-averaged data showed activated foci in the posterior superior temporal gyrus (STG) bilaterally and in or near the anterior insula/frontal operculum across all stimulus conditions compared to silence. The anterior STG was activated bilaterally for speech signals, but only on the right side for TR sentences. Only nonspeech conditions showed frontal-lobe activation in both the left inferior frontal gyrus [Brodmann's area (BA) 47] and ventromedial prefrontal areas (BA 10/11). An STG focus near the superior temporal sulcus was observed for sentence compared to word. The present findings show that both speech and nonspeech engaged a distributed network in temporal cortex for early acoustic and prelexical phonological analysis. Yet backward speech, though lacking semantic content, is perceived as speechlike by engaging prefrontal regions implicated in lexico-semantic processing.
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Affiliation(s)
- Donald Wong
- Department of Anatomy and Cell Biology, Medical Science 5022, Indiana University School of Medicine, 635 Barnhill Drive, Indianapolis, IN 46202, USA.
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