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Ye Z, Lu X, Zhu M, Bi L, Yang F, Zhou B, Xu D, Yao L. STING-Targeted PET Imaging for Specific Detection and Therapeutic Monitoring of Myocarditis. Mol Pharm 2024; 21:2865-2877. [PMID: 38666508 DOI: 10.1021/acs.molpharmaceut.4c00024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2024]
Abstract
Imaging strategies for the specific detection and therapeutic monitoring of myocarditis are still lacking. Stimulator of interferon genes (STING) is a signal transduction molecule involved in an innate immune response. Here, we evaluated the feasibility of the recently developed STING-targeted radiotracer [18F]FBTA for positron emission tomography (PET) imaging to detect myocardial inflammation and monitor treatment in myocarditis mice. [18F]FBTA-PET imaging was performed in myocarditis mice and normal mice to verify the specificity of [18F]FBTA for the diagnosis of myocarditis. We also performed PET imaging in mice with myocarditis treated to verify the ability of [18F]FBTA in therapeutic monitoring. The expression of STING and inflammatory cell types was confirmed by flow cytometry and immunohistochemistry. [18F]FDG-PET imaging of myocarditis was used as a contrast. [18F]FBTA-PET imaging showed that the average radioactive uptake was significantly higher in the hearts of the myocarditis group than in the control group. STING was highly overexpressed in cardiac inflammatory cells, including macrophages, dendritic cells (DCs), and T cells. However, there was no significant difference in cardiac radiotracer uptake of [18F]FDG between the myocarditis group and the control group. Moreover, cardiac uptake of [18F]FBTA was significantly reduced in cyclosporin A-treated myocarditis mice and myocardial STING expression was also significantly reduced after the treatment. Overall, we showed that a STING-targeted PET tracer [18F]FBTA can be used to monitor changes in the inflammatory microenvironment in myocarditis. Besides, [18F]FBTA-PET is also suitable for real-time monitoring of myocarditis treatment, representing a promising diagnostic and therapeutic monitoring approach for myocarditis.
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Affiliation(s)
- Zhou Ye
- Department of Emergency Medicine, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong 519000, China
- Guangdong Provincial Engineering Research Center of Molecular Imaging, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong 519000, China
| | - Xin Lu
- Department of Interventional Medicine, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong 519000, China
- Department of Nuclear Medicine, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong 519000, China
- Guangdong Provincial Engineering Research Center of Molecular Imaging, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong 519000, China
| | - Manman Zhu
- Center for Infection and Immunity, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong 519000, China
- Guangdong Provincial Engineering Research Center of Molecular Imaging, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong 519000, China
| | - Lei Bi
- Guangdong Provincial Engineering Research Center of Molecular Imaging, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong 519000, China
| | - Fan Yang
- Department of Pediatrics, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong 519000, China
- Department of Nuclear Medicine, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong 519000, China
- Guangdong Provincial Engineering Research Center of Molecular Imaging, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong 519000, China
| | - Bin Zhou
- Department of Interventional Medicine, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong 519000, China
- Center of Cerebrovascular Disease, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong 519000, China
- Guangdong Provincial Engineering Research Center of Molecular Imaging, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong 519000, China
| | - Duo Xu
- Department of Interventional Medicine, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong 519000, China
- Department of Nuclear Medicine, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong 519000, China
- Guangdong Provincial Engineering Research Center of Molecular Imaging, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong 519000, China
- Guangdong-Hong Kong-Macao University Joint Laboratory of Interventional Medicine, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai 519000, China
| | - Lan Yao
- Department of Emergency Medicine, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, Guangdong 519000, China
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2
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Jahandideh A, Virta J, Li XG, Liljenbäck H, Moisio O, Ponkamo J, Rajala N, Alix M, Lehtonen J, Mäyränpää MI, Salminen TA, Knuuti J, Jalkanen S, Saraste A, Roivainen A. Vascular adhesion protein-1-targeted PET imaging in autoimmune myocarditis. J Nucl Cardiol 2023; 30:2760-2772. [PMID: 37758963 PMCID: PMC10682147 DOI: 10.1007/s12350-023-03371-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Accepted: 08/06/2023] [Indexed: 09/29/2023]
Abstract
BACKGROUND Vascular adhesion protein-1 (VAP-1) is an adhesion molecule and primary amine oxidase, and Gallium-68-labeled 1,4,7,10-tetraazacyclododecane-N,N',N″,N‴-tetra-acetic acid conjugated sialic acid-binding immunoglobulin-like lectin 9 motif containing peptide ([68Ga]Ga-DOTA-Siglec-9) is a positron emission tomography (PET) tracer targeting VAP-1. We evaluated the feasibility of PET imaging with [68Ga]Ga-DOTA-Siglec-9 for the detection of myocardial lesions in rats with autoimmune myocarditis. METHODS Rats (n = 9) were immunized twice with porcine cardiac myosin in complete Freund's adjuvant. Control rats (n = 6) were injected with Freund's adjuvant alone. On day 21, in vivo PET/computed tomography (CT) imaging with [68Ga]Ga-DOTA-Siglec-9 was performed, followed by ex vivo autoradiography, histology, and immunohistochemistry of tissue sections. In addition, myocardial samples from three patients with cardiac sarcoidosis were studied. RESULTS [68Ga]Ga-DOTA-Siglec-9 PET/CT images of immunized rats showed higher uptake in myocardial lesions than in myocardium outside lesions (SUVmean, 0.5 ± 0.1 vs 0.3 ± 0.1; P = .003) or control rats (SUVmean, 0.2 ± 0.03; P < .0001), which was confirmed by ex vivo autoradiography of tissue sections. Immunohistochemistry showed VAP-1-positive staining in lesions of rats with myocarditis and in patients with cardiac sarcoidosis. CONCLUSION VAP-1-targeted [68Ga]Ga-DOTA-Siglec-9 PET is a potential novel technique for the detection of myocardial lesions.
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Affiliation(s)
- Arghavan Jahandideh
- Turku PET Centre, University of Turku, Åbo Akademi University and Turku University Hospital, 20520, Turku, Finland
| | - Jenni Virta
- Turku PET Centre, University of Turku, Åbo Akademi University and Turku University Hospital, 20520, Turku, Finland
| | - Xiang-Guo Li
- Turku PET Centre, University of Turku, Åbo Akademi University and Turku University Hospital, 20520, Turku, Finland
- InFLAMES Research Flagship Center, University of Turku, Turku, Finland
- Department of Chemistry, University of Turku, Turku, Finland
| | - Heidi Liljenbäck
- Turku PET Centre, University of Turku, Åbo Akademi University and Turku University Hospital, 20520, Turku, Finland
- Turku Center for Disease Modeling, University of Turku, Turku, Finland
| | - Olli Moisio
- Turku PET Centre, University of Turku, Åbo Akademi University and Turku University Hospital, 20520, Turku, Finland
| | - Jesse Ponkamo
- Turku PET Centre, University of Turku, Åbo Akademi University and Turku University Hospital, 20520, Turku, Finland
| | - Noora Rajala
- Turku PET Centre, University of Turku, Åbo Akademi University and Turku University Hospital, 20520, Turku, Finland
| | - Marion Alix
- Structural Bioinformatics Laboratory, Åbo Akademi University, Turku, Finland
| | - Jukka Lehtonen
- Heart and Lung Center, Helsinki University and Helsinki University Hospital, Helsinki, Finland
| | - Mikko I Mäyränpää
- Department of Pathology, Helsinki University and Helsinki University Hospital, Helsinki, Finland
| | - Tiina A Salminen
- InFLAMES Research Flagship Center, University of Turku, Turku, Finland
- Structural Bioinformatics Laboratory, Åbo Akademi University, Turku, Finland
| | - Juhani Knuuti
- Turku PET Centre, University of Turku, Åbo Akademi University and Turku University Hospital, 20520, Turku, Finland
- InFLAMES Research Flagship Center, University of Turku, Turku, Finland
| | - Sirpa Jalkanen
- InFLAMES Research Flagship Center, University of Turku, Turku, Finland
- MediCity Research Laboratory and Institute of Biomedicine, University of Turku, Turku, Finland
| | - Antti Saraste
- Turku PET Centre, University of Turku, Åbo Akademi University and Turku University Hospital, 20520, Turku, Finland
- Heart Center, Turku University Hospital and University of Turku, Turku, Finland
| | - Anne Roivainen
- Turku PET Centre, University of Turku, Åbo Akademi University and Turku University Hospital, 20520, Turku, Finland.
- InFLAMES Research Flagship Center, University of Turku, Turku, Finland.
- Turku Center for Disease Modeling, University of Turku, Turku, Finland.
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3
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Gondry O, Xavier C, Raes L, Heemskerk J, Devoogdt N, Everaert H, Breckpot K, Lecocq Q, Decoster L, Fontaine C, Schallier D, Aspeslagh S, Vaneycken I, Raes G, Van Ginderachter JA, Lahoutte T, Caveliers V, Keyaerts M. Phase I Study of [ 68Ga]Ga-Anti-CD206-sdAb for PET/CT Assessment of Protumorigenic Macrophage Presence in Solid Tumors (MMR Phase I). J Nucl Med 2023; 64:1378-1384. [PMID: 37474271 PMCID: PMC10478821 DOI: 10.2967/jnumed.122.264853] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 05/05/2023] [Indexed: 07/22/2023] Open
Abstract
Macrophages play an important role throughout the body. Antiinflammatory macrophages expressing the macrophage mannose receptor (MMR, CD206) are involved in disease development, ranging from oncology to atherosclerosis and rheumatoid arthritis. [68Ga]Ga-NOTA-anti-CD206 single-domain antibody (sdAb) is a PET tracer targeting CD206. This first-in-human study, as its primary objective, evaluated the safety, biodistribution, and dosimetry of this tracer. The secondary objective was to assess its tumor uptake. Methods: Seven patients with a solid tumor of at least 10 mm, an Eastern Cooperative Oncology Group score of 0 or 1, and good renal and hepatic function were included. Safety was evaluated using clinical examination and blood sampling before and after injection. For biodistribution and dosimetry, PET/CT was performed at 11, 90, and 150 min after injection; organs showing tracer uptake were delineated, and dosimetry was evaluated. Blood samples were obtained at selected time points for blood clearance. Metabolites in blood and urine were assessed. Results: Seven patients were injected with, on average, 191 MBq of [68Ga]Ga-NOTA-anti-CD206-sdAb. Only 1 transient adverse event of mild severity was considered to be possibly, although unlikely, related to the study drug (headache, Common Terminology Criteria for Adverse Events grade 1). The blood clearance was fast, with less than 20% of the injected activity remaining after 80 min. There was uptake in the liver, kidneys, spleen, adrenals, and red bone marrow. The average effective dose from the radiopharmaceutical was 4.2 mSv for males and 5.2 mSv for females. No metabolites were detected. Preliminary data of tumor uptake in cancer lesions showed higher uptake in the 3 patients who subsequently progressed than in the 3 patients without progression. One patient could not be evaluated because of technical failure. Conclusion: [68Ga]Ga-NOTA-anti-CD206-sdAb is safe and well tolerated. It shows rapid blood clearance and renal excretion, enabling high contrast-to-noise imaging at 90 min after injection. The radiation dose is comparable to that of routinely used PET tracers. These findings and the preliminary results in cancer patients warrant further investigation of this tracer in phase II clinical trials.
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Affiliation(s)
- Odrade Gondry
- MIMA, Department of Medical Imaging, Vrije Universiteit Brussel, Brussels, Belgium;
- Nuclear Medicine Department, Universitair Ziekenhuis Brussel, Brussels, Belgium
| | - Catarina Xavier
- MIMA, Department of Medical Imaging, Vrije Universiteit Brussel, Brussels, Belgium
| | - Laurens Raes
- Nuclear Medicine Department, Universitair Ziekenhuis Brussel, Brussels, Belgium
| | - Johannes Heemskerk
- Nuclear Medicine Department, Universitair Ziekenhuis Brussel, Brussels, Belgium
| | - Nick Devoogdt
- MIMA, Department of Medical Imaging, Vrije Universiteit Brussel, Brussels, Belgium
| | - Hendrik Everaert
- Nuclear Medicine Department, Universitair Ziekenhuis Brussel, Brussels, Belgium
| | - Karine Breckpot
- Laboratory for Molecular and Cellular Therapy, Vrije Universiteit Brussel, Brussels, Belgium
| | - Quentin Lecocq
- Laboratory for Molecular and Cellular Therapy, Vrije Universiteit Brussel, Brussels, Belgium
| | - Lore Decoster
- Department of Medical Oncology, Universitair Ziekenhuis Brussel, Brussels, Belgium
| | - Christel Fontaine
- Department of Medical Oncology, Universitair Ziekenhuis Brussel, Brussels, Belgium
| | - Denis Schallier
- Department of Medical Oncology, Universitair Ziekenhuis Brussel, Brussels, Belgium
| | - Sandrine Aspeslagh
- Department of Medical Oncology, Universitair Ziekenhuis Brussel, Brussels, Belgium
| | - Ilse Vaneycken
- Nuclear Medicine Department, Universitair Ziekenhuis Brussel, Brussels, Belgium
| | - Geert Raes
- Cellular and Molecular Immunology, Lab of Cellular and Molecular Immunology, Vrije Universiteit Brussel, Brussels, Belgium; and
- Myeloid Cell Immunology Lab, VIB Center for Inflammation Research, Brussels, Belgium
| | - Jo A Van Ginderachter
- Cellular and Molecular Immunology, Lab of Cellular and Molecular Immunology, Vrije Universiteit Brussel, Brussels, Belgium; and
- Myeloid Cell Immunology Lab, VIB Center for Inflammation Research, Brussels, Belgium
| | - Tony Lahoutte
- MIMA, Department of Medical Imaging, Vrije Universiteit Brussel, Brussels, Belgium
- Nuclear Medicine Department, Universitair Ziekenhuis Brussel, Brussels, Belgium
| | - Vicky Caveliers
- MIMA, Department of Medical Imaging, Vrije Universiteit Brussel, Brussels, Belgium
- Nuclear Medicine Department, Universitair Ziekenhuis Brussel, Brussels, Belgium
| | - Marleen Keyaerts
- MIMA, Department of Medical Imaging, Vrije Universiteit Brussel, Brussels, Belgium
- Nuclear Medicine Department, Universitair Ziekenhuis Brussel, Brussels, Belgium
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Sunwoo SH, Cha MJ, Han SI, Kang H, Cho YS, Yeom DH, Park CS, Park NK, Choi SW, Kim SJ, Cha GD, Jung D, Choi S, Oh S, Nam GB, Hyeon T, Kim DH, Lee SP. Ventricular tachyarrhythmia treatment and prevention by subthreshold stimulation with stretchable epicardial multichannel electrode array. SCIENCE ADVANCES 2023; 9:eadf6856. [PMID: 37000879 PMCID: PMC10065438 DOI: 10.1126/sciadv.adf6856] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Accepted: 02/28/2023] [Indexed: 05/24/2023]
Abstract
The implantable cardioverter-defibrillator (ICD) is an effective method to prevent sudden cardiac death in high-risk patients. However, the transvenous lead is incompatible with large-area electrophysiological mapping and cannot accommodate selective multichannel precision stimulations. Moreover, it involves high-energy shocks, resulting in pain, myocardial damage, and recurrences of ventricular tachyarrhythmia (VTA). We present a method for VTA treatment based on subthreshold electrical stimulations using a stretchable epicardial multichannel electrode array, which does not disturb the normal contraction or electrical propagation of the ventricle. In rabbit models with myocardial infarction, the infarction was detected by mapping intracardiac electrograms with the stretchable epicardial multichannel electrode array. Then, VTAs could be terminated by sequential electrical stimuli from the epicardial multichannel electrode array beginning with low-energy subthreshold stimulations. Last, we used these subthreshold stimulations to prevent the occurrence of additional VTAs. The proposed protocol using the stretchable epicardial multichannel electrode array provides opportunities toward the development of innovative methods for painless ICD therapy.
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MESH Headings
- Rabbits
- Animals
- Tachycardia, Ventricular/therapy
- Tachycardia, Ventricular/epidemiology
- Tachycardia, Ventricular/etiology
- Defibrillators, Implantable/adverse effects
- Heart Ventricles
- Death, Sudden, Cardiac/etiology
- Death, Sudden, Cardiac/prevention & control
- Death, Sudden, Cardiac/epidemiology
- Myocardial Infarction/therapy
- Myocardial Infarction/etiology
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Affiliation(s)
- Sung-Hyuk Sunwoo
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, Republic of Korea
- School of Chemical and Biological Engineering and Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea
- Institute of Radiation Medicine, Seoul National University Medical Research Center, Seoul 03080, Republic of Korea
| | - Myung-Jin Cha
- Departments of Cardiology and Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Republic of Korea
- Division of Cardiology, Department of Internal Medicine, Seoul National University Hospital, Seoul 03080, Republic of Korea
| | - Sang Ihn Han
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, Republic of Korea
- School of Chemical and Biological Engineering and Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea
| | - Hyejeong Kang
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, Republic of Korea
- Division of Cardiology, Department of Internal Medicine, Seoul National University Hospital, Seoul 03080, Republic of Korea
| | - Ye Seul Cho
- Division of Cardiology, Department of Internal Medicine, Seoul National University Hospital, Seoul 03080, Republic of Korea
| | - Da-Hae Yeom
- Division of Cardiology, Department of Internal Medicine, Seoul National University Hospital, Seoul 03080, Republic of Korea
| | - Chan Soon Park
- Division of Cardiology, Department of Internal Medicine, Seoul National University Hospital, Seoul 03080, Republic of Korea
| | - Na Kyeong Park
- Department of Physiology, Seoul National University College of Medicine, Seoul 03080, Republic of Korea
| | - Seong Woo Choi
- Department of Physiology, Dongguk University College of Medicine, Gyeongju 38066, Republic of Korea
| | - Sung Joon Kim
- Department of Physiology, Seoul National University College of Medicine, Seoul 03080, Republic of Korea
| | - Gi Doo Cha
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, Republic of Korea
- School of Chemical and Biological Engineering and Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea
| | - Dongjun Jung
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, Republic of Korea
- School of Chemical and Biological Engineering and Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea
| | - Suji Choi
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, Republic of Korea
- School of Chemical and Biological Engineering and Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea
| | - Seil Oh
- Division of Cardiology, Department of Internal Medicine, Seoul National University Hospital, Seoul 03080, Republic of Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul 03080, Republic of Korea
| | - Gi-Byoung Nam
- Departments of Cardiology and Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Republic of Korea
| | - Taeghwan Hyeon
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, Republic of Korea
- School of Chemical and Biological Engineering and Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea
| | - Dae-Hyeong Kim
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, Republic of Korea
- School of Chemical and Biological Engineering and Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Seung-Pyo Lee
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, Republic of Korea
- Division of Cardiology, Department of Internal Medicine, Seoul National University Hospital, Seoul 03080, Republic of Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul 03080, Republic of Korea
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5
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Gu GJ, Chung H, Park JY, Yoo R, Im HJ, Choi H, Lee YS, Seok SH. Mannosylated-serum albumin nanoparticle imaging to monitor tumor-associated macrophages under anti-PD1 treatment. J Nanobiotechnology 2023; 21:31. [PMID: 36707872 PMCID: PMC9881286 DOI: 10.1186/s12951-023-01791-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Accepted: 01/21/2023] [Indexed: 01/28/2023] Open
Abstract
BACKGROUND Immune checkpoint inhibitors such as anti-programmed cell death protein 1 (PD1) block tumor growth by reinvigorating the immune system; however, determining their efficacy only by the changes in tumor size may prove inaccurate. As the immune cells including macrophages in the tumor microenvironment (TME) are associated with the response to anti-PD1 therapy, tumor-associated macrophages (TAMs) imaging using nanoparticles can noninvasively provide the immune enrichment status of TME. Herein, the mannosylated-serum albumin (MSA) nanoparticle was labeled with radioactive isotope 68Ga to target the mannose receptors on macrophages for noninvasive monitoring of the TME according to anti-PD1 therapy. RESULTS B16F10-Luc and MC38-Luc tumor-bearing mice were treated with anti-PD1, and the response to anti-PD1 was determined by the tumor volume. According to the flow cytometry, the responders to anti-PD1 showed an increased proportion of TAMs, as well as lymphocytes, and the most enriched immune cell population in the TME was also TAMs. For noninvasive imaging of TAMs as a surrogate of immune cell augmentation in the TME via anti-PD1, we acquired [68Ga] Ga-MSA positron emission tomography. According to the imaging study, an increased number of TAMs in responders at the early phase of anti-PD1 treatment was observed in both B16F10-Luc and MC38-Luc tumor-bearing mice models. CONCLUSION As representative immune cells in the TME, non-invasive imaging of TAMs using MSA nanoparticles can reflect the immune cell enrichment status in the TME closely associated with the response to anti-PD1. As non-invasive imaging using MSA nanoparticles, this approach shows a potential to monitor and evaluate anti-tumor response to immune checkpoint inhibitors.
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Affiliation(s)
- Gyo Jeong Gu
- grid.31501.360000 0004 0470 5905Macrophage Laboratory, Department of Microbiology and Immunology, Institute of Endemic Disease, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Hyewon Chung
- grid.31501.360000 0004 0470 5905Macrophage Laboratory, Department of Microbiology and Immunology, Institute of Endemic Disease, Seoul National University College of Medicine, Seoul, Republic of Korea ,grid.31501.360000 0004 0470 5905Bio-MAX Institute, Seoul National University, Seoul, Republic of Korea
| | - Ji Yong Park
- grid.31501.360000 0004 0470 5905Department of Nuclear Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea ,grid.31501.360000 0004 0470 5905Dental Research Institute, Seoul National University, Seoul, Republic of Korea
| | - Ranji Yoo
- grid.31501.360000 0004 0470 5905Department of Nuclear Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea ,grid.412484.f0000 0001 0302 820X Biomedical Research Institute, Seoul National University Hospital, Seoul, Republic of Korea
| | - Hyung-Jun Im
- grid.31501.360000 0004 0470 5905Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Seoul, Republic of Korea ,grid.31501.360000 0004 0470 5905Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Hongyoon Choi
- grid.31501.360000 0004 0470 5905Department of Nuclear Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea ,grid.31501.360000 0004 0470 5905Radiation Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea ,grid.412484.f0000 0001 0302 820XDepartment of Nuclear Medicine, Seoul National University Hospital, Seoul, Republic of Korea
| | - Yun-Sang Lee
- grid.31501.360000 0004 0470 5905Department of Nuclear Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea ,grid.31501.360000 0004 0470 5905Radiation Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea ,grid.31501.360000 0004 0470 5905Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea ,grid.31501.360000 0004 0470 5905Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Seung Hyeok Seok
- grid.31501.360000 0004 0470 5905Macrophage Laboratory, Department of Microbiology and Immunology, Institute of Endemic Disease, Seoul National University College of Medicine, Seoul, Republic of Korea ,grid.31501.360000 0004 0470 5905Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea ,grid.31501.360000 0004 0470 5905Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, Republic of Korea
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6
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Heo GS, Diekmann J, Thackeray JT, Liu Y. Nuclear Methods for Immune Cell Imaging: Bridging Molecular Imaging and Individualized Medicine. Circ Cardiovasc Imaging 2023; 16:e014067. [PMID: 36649445 PMCID: PMC9858352 DOI: 10.1161/circimaging.122.014067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Inflammation is a key mechanistic contributor to the progression of cardiovascular disease, from atherosclerosis through ischemic injury and overt heart failure. Recent evidence has identified specific roles of immune cell subpopulations in cardiac pathogenesis that diverges between individual patients. Nuclear imaging approaches facilitate noninvasive and serial quantification of inflammation severity, offering the opportunity to predict eventual outcome, stratify patient risk, and guide novel targeted molecular therapies against specific leukocyte subpopulations. Here, we will discuss the established and emerging nuclear imaging methods to label and track exogenous and endogenous immune cells, with a particular focus on clinical situations in which targeted molecular inflammation imaging would be advantageous. The expanding options for imaging inflammation provide the foundation to bridge between molecular imaging and individual therapy.
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Affiliation(s)
- Gyu Seong Heo
- Mallinckrodt Institute of Radiology, Washington University, St. Louis, MO (G.S.H., Y. L.)
| | - Johanna Diekmann
- Department of Nuclear Medicine, Hannover Medical School, Hannover, Germany (J.D., J.T.T.)
| | - James T Thackeray
- Department of Nuclear Medicine, Hannover Medical School, Hannover, Germany (J.D., J.T.T.)
| | - Yongjian Liu
- Mallinckrodt Institute of Radiology, Washington University, St. Louis, MO (G.S.H., Y. L.)
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7
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Schlein E, Syvänen S, Rokka J, Gustavsson T, Rossin R, Robillard M, Eriksson J, Sehlin D. Functionalization of Radiolabeled Antibodies to Enhance Peripheral Clearance for High Contrast Brain Imaging. Mol Pharm 2022; 19:4111-4122. [PMID: 36201682 PMCID: PMC9644377 DOI: 10.1021/acs.molpharmaceut.2c00536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
Small molecule imaging
agents such as [11C]PiB, which
bind to the core of insoluble amyloid-β (Aβ) fibrils,
are useful tools in Alzheimer’s disease (AD) research, diagnostics,
and drug development. However, the [11C]PiB PET signal
saturates early in the disease progression and does not detect soluble
or diffuse Aβ pathology which are believed to play important
roles in the disease progression. Antibodies, modified into a bispecific
format to enter the brain via receptor-mediated transcytosis, could
be a suitable alternative because of their diversity and high specificity
for their target. However, the circulation time of these antibodies
is long, resulting in an extended exposure to radiation and low imaging
contrast. Here, we explore two alternative strategies to enhance imaging
contrast by increasing clearance of the antibody ligand from blood.
The bispecific Aβ targeting antibody RmAb158-scFv8D3 and the
monospecific RmAb158 were radiolabeled and functionalized with either
α-d-mannopyranosylphenyl isothiocyanate (mannose) or
with trans-cyclooctene (TCO). While mannose can directly
mediate antibody clearance via the liver, TCO-modified antibody clearance
was induced by injection of a tetrazine-functionalized, liver-targeting
clearing agent (CA). In vivo experiments in wild type and AD transgenic
mice demonstrated the ability of both strategies to drastically shorten
the circulation time of RmAb158, while they had limited effect on
the bispecific variant RmAb158-8D3. Furthermore, single photon emission
computed tomography imaging with TCO-[125I]I-RmAb158 in
AD mice showed higher contrast 1 day after injection of the tetrazine-functionalized
CA. In conclusion, strategies to enhance the clearance of antibody-based
imaging ligands could allow imaging at earlier time points and thereby
open the possibility to combine antibodies with short-lived radionuclides
such as fluorine-18.
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Affiliation(s)
- Eva Schlein
- Department of Public Health and Caring Sciences, Uppsala University, 751 85 Uppsala, Sweden
| | - Stina Syvänen
- Department of Public Health and Caring Sciences, Uppsala University, 751 85 Uppsala, Sweden
| | - Johanna Rokka
- Department of Public Health and Caring Sciences, Uppsala University, 751 85 Uppsala, Sweden
| | - Tobias Gustavsson
- Department of Public Health and Caring Sciences, Uppsala University, 751 85 Uppsala, Sweden
| | - Raffaella Rossin
- Tagworks Pharmaceuticals, Toernooiveld 1, 6525 ED Nijmegen, Netherlands
| | - Marc Robillard
- Tagworks Pharmaceuticals, Toernooiveld 1, 6525 ED Nijmegen, Netherlands
| | - Jonas Eriksson
- PET Centre, Uppsala University Hospital, 751 85 Uppsala, Sweden.,Department of Medicinal Chemistry, Uppsala University, 751 23 Uppsala, Sweden
| | - Dag Sehlin
- Department of Public Health and Caring Sciences, Uppsala University, 751 85 Uppsala, Sweden
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8
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van der Geest KSM, Sandovici M, Nienhuis PH, Slart RHJA, Heeringa P, Brouwer E, Jiemy WF. Novel PET Imaging of Inflammatory Targets and Cells for the Diagnosis and Monitoring of Giant Cell Arteritis and Polymyalgia Rheumatica. Front Med (Lausanne) 2022; 9:902155. [PMID: 35733858 PMCID: PMC9207253 DOI: 10.3389/fmed.2022.902155] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 05/13/2022] [Indexed: 12/26/2022] Open
Abstract
Giant cell arteritis (GCA) and polymyalgia rheumatica (PMR) are two interrelated inflammatory diseases affecting patients above 50 years of age. Patients with GCA suffer from granulomatous inflammation of medium- to large-sized arteries. This inflammation can lead to severe ischemic complications (e.g., irreversible vision loss and stroke) and aneurysm-related complications (such as aortic dissection). On the other hand, patients suffering from PMR present with proximal stiffness and pain due to inflammation of the shoulder and pelvic girdles. PMR is observed in 40-60% of patients with GCA, while up to 21% of patients suffering from PMR are also affected by GCA. Due to the risk of ischemic complications, GCA has to be promptly treated upon clinical suspicion. The treatment of both GCA and PMR still heavily relies on glucocorticoids (GCs), although novel targeted therapies are emerging. Imaging has a central position in the diagnosis of GCA and PMR. While [18F]fluorodeoxyglucose (FDG)-positron emission tomography (PET) has proven to be a valuable tool for diagnosis of GCA and PMR, it possesses major drawbacks such as unspecific uptake in cells with high glucose metabolism, high background activity in several non-target organs and a decrease of diagnostic accuracy already after a short course of GC treatment. In recent years, our understanding of the immunopathogenesis of GCA and, to some extent, PMR has advanced. In this review, we summarize the current knowledge on the cellular heterogeneity in the immunopathology of GCA/PMR and discuss how recent advances in specific tissue infiltrating leukocyte and stromal cell profiles may be exploited as a source of novel targets for imaging. Finally, we discuss prospective novel PET radiotracers that may be useful for the diagnosis and treatment monitoring in GCA and PMR.
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Affiliation(s)
- Kornelis S. M. van der Geest
- Department of Rheumatology and Clinical Immunology, University of Groningen, University Medical Center Groningen, Groningen, Netherlands
| | - Maria Sandovici
- Department of Rheumatology and Clinical Immunology, University of Groningen, University Medical Center Groningen, Groningen, Netherlands
| | - Pieter H. Nienhuis
- Department of Nuclear Medicine and Molecular Imaging, Medical Imaging Center, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Riemer H. J. A. Slart
- Department of Nuclear Medicine and Molecular Imaging, Medical Imaging Center, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
- Department of Biomedical Photonic Imaging Group, University of Twente, Enschede, Netherlands
| | - Peter Heeringa
- Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, Groningen, Netherlands
| | - Elisabeth Brouwer
- Department of Rheumatology and Clinical Immunology, University of Groningen, University Medical Center Groningen, Groningen, Netherlands
| | - William F. Jiemy
- Department of Rheumatology and Clinical Immunology, University of Groningen, University Medical Center Groningen, Groningen, Netherlands
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9
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Varasteh Z, Braeuer M, Mohanta S, Steinsiek AL, Habenicht A, Omidvari N, Topping GJ, Rischpler C, Weber WA, Sager HB, Raes G, Hernot S, Schwaiger M. In vivo Visualization of M2 Macrophages in the Myocardium After Myocardial Infarction (MI) Using 68Ga-NOTA-Anti-MMR Nb: Targeting Mannose Receptor (MR, CD206) on M2 Macrophages. Front Cardiovasc Med 2022; 9:889963. [PMID: 35548425 PMCID: PMC9081970 DOI: 10.3389/fcvm.2022.889963] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 03/29/2022] [Indexed: 12/02/2022] Open
Abstract
Introduction and Objectives Wound healing after myocardial infarction (MI) is a dynamic and complex multiple phase process, and a coordinated cellular response is required for proper scar formation. The current paradigm suggests that pro-inflammatory monocytes infiltrate the MI zone during the initial pro-inflammatory phase and differentiate into inflammatory macrophages, and then switch their phenotypes to anti-inflammatory during the reparative phase. Visualization of the reparative phase post-MI is of great interest because it may reveal delayed resolution of inflammation, which in turn predicts adverse cardiac remodeling. Imaging of anti-inflammatory macrophages may also be used to assess therapy approaches aiming to modulate the inflammatory response in order to limit MI size. Reparative macrophages can be distinguished from inflammatory macrophages by the surface marker mannose receptor (MR, CD206). In this study we evaluated the feasibility of 68Ga-NOTA-anti-MMR Nb for imaging of MR on alternatively activated macrophages in murine MI models. Methods Wildtype and MR-knockout mice and Wistar rats were subjected to MI via permanent ligation of the left coronary artery. Non-operated or sham-operated animals were used as controls. MR expression kinetics on cardiac macrophages was measured in mice using flow cytometry. PET/CT scans were performed 1 h after intravenous injection of 68Ga-NOTA-anti-MMR Nb. Mice and rats were euthanized and hearts harvested for ex vivo PET/MRI, autoradiography, and staining. As a non-targeting negative control, 68Ga-NOTA-BCII10 was used. Results In vivo-PET/CT scans showed focal radioactivity signals in the infarcted myocardium for 68Ga-NOTA-anti-MMR Nb which were confirmed by ex vivo-PET/MRI scans. In autoradiography images, augmented uptake of the tracer was observed in infarcts, as verified by the histochemistry analysis. Immunofluorescence staining demonstrated the presence and co-localization of CD206- and CD68-positive cells, in accordance to infarct zone. No in vivo or ex vivo signal was observed in the animals injected with control Nb or in the sham-operated animals. 68Ga-NOTA-anti-MMR Nb uptake in the infarcts of MR-knockout mice was negligibly low, confirming the specificity of 68Ga-NOTA-anti-MMR Nb to MR. Conclusion This exploratory study highlights the potential of 68Ga-NOTA-anti-MMR Nb to image MR-positive macrophages that are known to play a pivotal role in wound healing that follows acute MI.
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Affiliation(s)
- Zohreh Varasteh
- Department of Nuclear Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
- Department of Nuclear Medicine, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
- *Correspondence: Zohreh Varasteh,
| | - Miriam Braeuer
- Department of Nuclear Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Sarajo Mohanta
- Institute for Cardiovascular Prevention, University Hospital of Ludwig-Maximilians-University, Munich, Germany
| | - Anna-Lena Steinsiek
- Department of Cardiology, German Heart Centre Munich, Technical of University Munich, Munich, Germany
| | - Andreas Habenicht
- Institute for Cardiovascular Prevention, University Hospital of Ludwig-Maximilians-University, Munich, Germany
| | - Negar Omidvari
- Department of Nuclear Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Geoffrey J. Topping
- Department of Nuclear Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Christoph Rischpler
- Department of Nuclear Medicine, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Wolfgang A. Weber
- Department of Nuclear Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Hendrik B. Sager
- Department of Cardiology, German Heart Centre Munich, Technical of University Munich, Munich, Germany
- DZHK (German Centre for Cardiovascular Research), Partner Site Munich Heart Alliance, Munich, Germany
| | - Geert Raes
- Laboratory of Cellular and Molecular Immunology (CMIM), Vrije Universiteit Brussel, Brussels, Belgium
- Myeloid Cell Immunology Lab, VIB Center for Inflammation Research, Brussels, Belgium
| | - Sophie Hernot
- Laboratory for in vivo Cellular and Molecular Imaging, ICMI-BEFY/MIMA, Vrije Universiteit Brussel, Brussels, Belgium
| | - Markus Schwaiger
- Department of Nuclear Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
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10
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Li XG, Velikyan I, Viitanen R, Roivainen A. PET radiopharmaceuticals for imaging inflammatory diseases. Nucl Med Mol Imaging 2022. [DOI: 10.1016/b978-0-12-822960-6.00075-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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11
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NRM 2021 Abstract Booklet. J Cereb Blood Flow Metab 2021; 41:11-309. [PMID: 34905986 PMCID: PMC8851538 DOI: 10.1177/0271678x211061050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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12
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Cau R, Bassareo PP, Mannelli L, Suri JS, Saba L. Imaging in COVID-19-related myocardial injury. Int J Cardiovasc Imaging 2021; 37:1349-1360. [PMID: 33211242 PMCID: PMC7676417 DOI: 10.1007/s10554-020-02089-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 10/26/2020] [Indexed: 02/07/2023]
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS- CoV-2), previously named "2019 novel coronavirus" (2019-nCoV) is an emerging disease and a major public health issue. At the moment, little is known, except that its spread is on a steady upward trend. That is the reason why it was declared pandemic since March 11th, 2020. Respiratory symptoms dominate the clinical manifestations of the virus, but in a few patients also other organs are involved, such as their heart. This review article provides an overview of the existing literature regarding imaging of heart injury during COVID-19 acute infection and follow-up.
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Affiliation(s)
- Riccardo Cau
- Department of Radiology, Azienda Ospedaliero Universitaria (A.O.U.), di Cagliari - Polo di Monserrato s.s. 554 Monserrato, 09045, Cagliari, Italy
| | - Pier Paolo Bassareo
- Mater Misericordiae University Hospital and Our Lady's Children's Hospital, University College of Dublin, Crumlin, Dublin, Republic of Ireland
| | | | - Jasjit S Suri
- Stroke Monitoring and Diagnostic Division, ATHEROPOINT LLC, Roseville, CA, USA
| | - Luca Saba
- Department of Radiology, Azienda Ospedaliero Universitaria (A.O.U.), di Cagliari - Polo di Monserrato s.s. 554 Monserrato, 09045, Cagliari, Italy.
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13
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Imaging Inflammation with Positron Emission Tomography. Biomedicines 2021; 9:biomedicines9020212. [PMID: 33669804 PMCID: PMC7922638 DOI: 10.3390/biomedicines9020212] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2021] [Revised: 01/28/2021] [Accepted: 02/12/2021] [Indexed: 12/19/2022] Open
Abstract
The impact of inflammation on the outcome of many medical conditions such as cardiovascular diseases, neurological disorders, infections, cancer, and autoimmune diseases has been widely acknowledged. However, in contrast to neurological, oncologic, and cardiovascular disorders, imaging plays a minor role in research and management of inflammation. Imaging can provide insights into individual and temporospatial biology and grade of inflammation which can be of diagnostic, therapeutic, and prognostic value. There is therefore an urgent need to evaluate and understand current approaches and potential applications for imaging of inflammation. This review discusses radiotracers for positron emission tomography (PET) that have been used to image inflammation in cardiovascular diseases and other inflammatory conditions with a special emphasis on radiotracers that have already been successfully applied in clinical settings.
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14
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Non- 18F-FDG/ 18F-NaF Radiotracers Proposed for the Diagnosis and Management of Diseases of the Heart and Vasculature. PET Clin 2021; 16:273-284. [PMID: 33589388 DOI: 10.1016/j.cpet.2020.12.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
18F-fluorodeoxyglucose (18F-FDG) and 18F-sodium fluoride (18F-NaF) are front-runners in PET. However, these tracers have limitations in the imaging of diseases in the heart. A multitude of other radiotracers have been identified as potentially useful PET agents in the identification of cardiovascular disease. This critical review examines recent studies with the use of non-18F-FDG/18F-NaF radiotracers in the identification and surveillance of cardiovascular diseases. We highlight the need for further investigation into alternative PET radiotracers to demonstrate their clinical value in the management of these pathologies.
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15
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Mou T, Tian J, Tian Y, Yun M, Li J, Dong W, Lu X, Zhu Z, Mi H, Zhang X, Li X. Automated synthesis and preliminary evaluation of [ 18F]FDPA for cardiac inflammation imaging in rats after myocardial infarction. Sci Rep 2020; 10:18685. [PMID: 33122775 PMCID: PMC7596090 DOI: 10.1038/s41598-020-75705-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Accepted: 10/19/2020] [Indexed: 11/26/2022] Open
Abstract
A translocator protein 18 kDa targeted radiotracer, N,N-diethyl-2-(2-(4-[18F]fluorophenyl)-5,7-dimethylpyrazolo[1,5-a] pyrimidin-3-yl) acetamide ([18F]FDPA), was automated synthetized and evaluated for cardiac inflammation imaging. Various reaction conditions for an automated synthesis were systematically optimized. MicroPET/CT imaging were performed on normal rats and rats with myocardial infarction (MI). Normalized SUV ratios of [18F]FDPA to [13N]NH3 (NSRs) in different regions were calculated to normalize the uptake of [18F]FDPA to perfusion. The amount of TBAOMs and the volume/proportion of water were crucial for synthesis. After optimization, the total synthesis time was 68 min. The non-decay corrected radiochemical yields (RCYs) and molar activities were 19.9 ± 1.7% and 169.7 ± 46.5 GBq/μmol, respectively. In normal rats, [18F]FDPA showed a high and stable cardiac uptake and fast clearance from other organs. In MI rats, NSRs in the peri-infarct and infarct regions, which were infiltrated with massive inflammatory cells revealed by pathology, were higher than that in the remote region (1.20 ± 0.01 and 1.08 ± 0.10 vs. 0.89 ± 0.05, respectively). [18F]FDPA was automated synthesized with high RCYs and molar activities. It showed a high uptake in inflammation regions and offered a wide time window for cardiac imaging, indicating it could be a potential cardiac inflammation imaging agent.
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Affiliation(s)
- Tiantian Mou
- Department of Nuclear Medicine, Beijing Anzhen Hospital, Capital Medical University, No. 2 Anzhen Road, Chaoyang District, Beijing, 100029, China
| | - Jing Tian
- Department of Nuclear Medicine, Beijing Anzhen Hospital, Capital Medical University, No. 2 Anzhen Road, Chaoyang District, Beijing, 100029, China
| | - Yi Tian
- Department of Nuclear Medicine, Beijing Anzhen Hospital, Capital Medical University, No. 2 Anzhen Road, Chaoyang District, Beijing, 100029, China
| | - Mingkai Yun
- Department of Nuclear Medicine, Beijing Anzhen Hospital, Capital Medical University, No. 2 Anzhen Road, Chaoyang District, Beijing, 100029, China
| | - Junqi Li
- Department of Nuclear Medicine, Beijing Anzhen Hospital, Capital Medical University, No. 2 Anzhen Road, Chaoyang District, Beijing, 100029, China
| | - Wei Dong
- Department of Nuclear Medicine, Beijing Anzhen Hospital, Capital Medical University, No. 2 Anzhen Road, Chaoyang District, Beijing, 100029, China
| | - Xia Lu
- Department of Nuclear Medicine, Beijing Anzhen Hospital, Capital Medical University, No. 2 Anzhen Road, Chaoyang District, Beijing, 100029, China
| | - Ziwei Zhu
- Department of Nuclear Medicine, Beijing Anzhen Hospital, Capital Medical University, No. 2 Anzhen Road, Chaoyang District, Beijing, 100029, China
| | - Hongzhi Mi
- Department of Nuclear Medicine, Beijing Anzhen Hospital, Capital Medical University, No. 2 Anzhen Road, Chaoyang District, Beijing, 100029, China
| | - Xiaoli Zhang
- Department of Nuclear Medicine, Beijing Anzhen Hospital, Capital Medical University, No. 2 Anzhen Road, Chaoyang District, Beijing, 100029, China.
| | - Xiang Li
- Department of Nuclear Medicine, Beijing Anzhen Hospital, Capital Medical University, No. 2 Anzhen Road, Chaoyang District, Beijing, 100029, China.,Division of Nuclear Medicine, Department of Biomedical Imaging and Image-Guided Therapy, Medical University of Vienna, Vienna, Austria
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16
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Pittsburgh B Compound Positron Emission Tomography in Patients With AL Cardiac Amyloidosis. J Am Coll Cardiol 2020; 75:380-390. [PMID: 32000949 DOI: 10.1016/j.jacc.2019.11.037] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 10/27/2019] [Accepted: 11/11/2019] [Indexed: 02/06/2023]
Abstract
BACKGROUND It remains unknown whether the noninvasive evaluation of the degree of amyloid deposition in the myocardium can predict the prognosis of patients with light chain (AL) cardiac amyloidosis. OBJECTIVES The purpose of this study was to demonstrate that 11C-Pittsburgh B compound positron emission tomography (11C-PiB PET) is useful for prognostication of AL cardiac amyloidosis by noninvasively imaging the myocardial AL amyloid deposition. METHODS This study consecutively enrolled 41 chemotherapy-naïve AL cardiac amyloidosis patients. The amyloid deposit was quantitatively assessed with amyloid P immunohistochemistry in endomyocardial biopsy specimens and was compared with the degree of myocardial 11C-PiB uptake on PET. The primary endpoint was a composite of all-cause death, heart transplantation, and acute decompensated heart failure. RESULTS The degree of myocardial 11C-PiB PET uptake was significantly higher in the cardiac amyloidosis patients compared with normal subjects and correlated well with the degree of amyloid deposit on histology (R2 = 0.343, p < 0.001). During follow-up (median: 423 days, interquartile range: 93 to 1,222 days), 24 patients experienced the primary endpoint. When the cardiac amyloidosis patients were divided into tertiles by the degree of myocardial 11C-PiB PET uptake, patients with the highest PiB uptake experienced the worst clinical event-free survival (log-rank p = 0.014). The degree of myocardial PiB PET uptake was a significant predictor of clinical outcome on multivariate Cox regression analysis (adjusted hazard ratio: 1.185; 95% confidence interval: 1.054 to 1.332; p = 0.005). CONCLUSIONS These proof-of-concept results show that noninvasive evaluation of myocardial amyloid load by 11C-PiB PET reflects the degree of amyloid deposit and is an independent predictor of clinical outcome in AL cardiac amyloidosis patients.
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17
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Farber G, Boczar KE, Wiefels CC, Zelt JG, Guler EC, deKemp RA, Beanlands RS, Rotstein BH. The Future of Cardiac Molecular Imaging. Semin Nucl Med 2020; 50:367-385. [DOI: 10.1053/j.semnuclmed.2020.02.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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18
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Clinical Translation of [ 68Ga]Ga-NOTA-anti-MMR-sdAb for PET/CT Imaging of Protumorigenic Macrophages. Mol Imaging Biol 2020; 21:898-906. [PMID: 30671739 DOI: 10.1007/s11307-018-01302-5] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
PURPOSE Macrophage mannose receptor (MMR, CD206) expressing tumor-associated macrophages (TAM) are protumorigenic and was reported to negatively impact therapy responsiveness and is associated with higher chances of tumor relapse following multiple treatment regimens in preclinical tumor models. Since the distribution of immune cells within the tumor is often heterogeneous, sampling "errors" using tissue biopsies will occur. In order to overcome this limitation, we propose positron emission tomography (PET)/X-ray computed tomography (CT) imaging using 68Ga-labeled anti-MMR single-domain antibody fragment (sdAb) to assess the presence of these protumorigenic TAM. PROCEDURES Cross-reactive anti-MMR-sdAb was produced according to good manufacturing practice (GMP) and conjugated to p-SCN-Bn-NOTA bifunctional chelator for 68Ga-labeling. Biodistribution and PET/CT studies were performed in wild-type and MMR-deficient 3LL-R tumor-bearing mice. Biodistribution data obtained in mice were extrapolated to calculate radiation dose estimates for the human adult using OLINDA software. A 7-day repeated dose toxicity study for NOTA-anti-MMR-sdAb was performed in healthy mice up to a dose of 1.68 mg/kg. RESULTS [68Ga]Ga-NOTA-anti-MMR-sdAb was obtained with 76 ± 2 % radiochemical yield, 99 ± 1 % radiochemical purity, and apparent molar activity of 57 ± 11 GBq/μmol. In vivo biodistribution analysis showed fast clearance via the kidneys and retention in MMR-expressing organs and tumor, with tumor-to-blood and tumor-to-muscle ratios of 6.80 ± 0.62 and 5.47 ± 1.82, respectively. The calculated effective dose was 0.027 mSv/MBq and 0.034 mSv/MBq for male and female, respectively, which means that a proposed dose of 185 MBq in humans would yield a radiation dose of 5.0 and 6.3 mSv to male and female patients, respectively. In the toxicity study, no adverse effects were observed. CONCLUSIONS Preclinical validation of [68Ga]Ga-NOTA-anti-MMR-sdAb showed high specific uptake of this tracer in MMR-expressing TAM and organs, with no observed toxicity. [68Ga]Ga-NOTA-anti-MMR-sdAb is ready for a phase I clinical trial.
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19
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Li X, Rosenkrans ZT, Wang J, Cai W. PET imaging of macrophages in cardiovascular diseases. Am J Transl Res 2020; 12:1491-1514. [PMID: 32509158 PMCID: PMC7270023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 03/14/2020] [Indexed: 06/11/2023]
Abstract
Cardiovascular diseases (CVDs) have been the leading cause of death in United States. While tremendous progress has been made for treating CVDs over the year, the high prevalence and substantial medical costs requires the necessity for novel methods for the early diagnosis and treatment monitoring of CVDs. Macrophages are a promising target due to its crucial role in the progress of CVDs (atherosclerosis, myocardial infarction and inflammatory cardiomyopathies). Positron emission tomography (PET) is a noninvasive imaging technique with high sensitivity and provides quantitive functional information of the macrophages in CVDs. Although 18F-FDG can be taken up by active macrophages, the PET imaging tracer is non-specific and susceptible to blood glucose levels. Thus, developing more specific PET tracers will help us understand the role of macrophages in CVDs. Moreover, macrophage-targeted PET imaging will further improve the diagnosis, treatment monitoring, and outcome prediction for patients with CVDs. In this review, we summarize various targets-based tracers for the PET imaging of macrophages in CVDs and highlight research gaps to advise future directions.
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Affiliation(s)
- Xiang Li
- Department of Nuclear Medicine, Xijing Hospital, Fourth Military Medical UniversityXi’an 710032, Shaanxi, China
- Department of Radiology and Medical Physics, University of Wisconsin-MadisonMadison, WI 53705, USA
| | - Zachary T Rosenkrans
- Department of Pharmaceutical Sciences, University of Wisconsin-MadisonMadison, WI 53705, USA
| | - Jing Wang
- Department of Nuclear Medicine, Xijing Hospital, Fourth Military Medical UniversityXi’an 710032, Shaanxi, China
| | - Weibo Cai
- Department of Radiology and Medical Physics, University of Wisconsin-MadisonMadison, WI 53705, USA
- Department of Pharmaceutical Sciences, University of Wisconsin-MadisonMadison, WI 53705, USA
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20
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Park JB, Suh M, Park JY, Park JK, Kim YI, Kim H, Cho YS, Kang H, Kim K, Choi JH, Nam JW, Kim HK, Lee YS, Jeong JM, Kim YJ, Paeng JC, Lee SP. Assessment of Inflammation in Pulmonary Artery Hypertension by 68Ga-Mannosylated Human Serum Albumin. Am J Respir Crit Care Med 2020; 201:95-106. [PMID: 31322420 DOI: 10.1164/rccm.201903-0639oc] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Rationale: Diagnosis and monitoring of patients with pulmonary artery hypertension (PAH) is currently difficult.Objectives: We aimed to develop a noninvasive imaging modality for PAH that tracks the infiltration of macrophages into the pulmonary vasculature, using a positron emission tomography (PET) agent, 68Ga-2-(p-isothiocyanatobenzyl)-1,4,7-triazacyclononane-1,4,7-triacetic acid (NOTA) mannosylated human serum albumin (MSA), that targets the mannose receptor (MR).Methods: We induced PAH in rats by monocrotaline injection. Tissue analysis, echocardiography, and 68Ga-NOTA-MSA PET were performed weekly in rats after monocrotaline injection and in those treated with either sildenafil or macitentan. The translational potential of 68Ga-NOTA-MSA PET was explored in patients with PAH.Measurements and Main Results: Gene sets related to macrophages were significantly enriched on whole transcriptome sequencing of the lung tissue in PAH rats. Serial PET images of PAH rats demonstrated increasing uptake of 68Ga-NOTA-MSA in the lung by time that corresponded with the MR-positive macrophage recruitment observed in immunohistochemistry. In sildenafil- or macitentan-treated PAH rats, the infiltration of MR-positive macrophages by histology and the uptake of 68Ga-NOTA-MSA on PET was significantly lower than that of the PAH-only group. The pulmonary uptake of 68Ga-NOTA-MSA was significantly higher in patients with PAH than normal subjects (P = 0.009) or than those with pulmonary hypertension by left heart disease (P = 0.019) (n = 5 per group).Conclusions: 68Ga-NOTA-MSA PET can help diagnose PAH and monitor the inflammatory status by imaging the degree of macrophage infiltration into the lung. These observations suggest that 68Ga-NOTA-MSA PET has the potential to be used as a novel noninvasive diagnostic and monitoring tool of PAH.
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Affiliation(s)
- Jun-Bean Park
- Cardiovascular Center, Seoul National University Hospital, Seoul, Republic of Korea.,Division of Cardiology, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
| | | | | | - Jin Kyun Park
- Division of Rheumatology, Department of Internal Medicine, Seoul National University Hospital and Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Yong-Il Kim
- Department of Nuclear Medicine, University of Ulsan College of Medicine and Asan Medical Center, Seoul, Republic of Korea; and
| | - Hyunah Kim
- Cardiovascular Center, Seoul National University Hospital, Seoul, Republic of Korea
| | - Ye Seul Cho
- Cardiovascular Center, Seoul National University Hospital, Seoul, Republic of Korea
| | - Hyejeong Kang
- Cardiovascular Center, Seoul National University Hospital, Seoul, Republic of Korea
| | - Kibyung Kim
- Department of Life Science, College of Natural Sciences, Hanyang University, Seoul, Republic of Korea
| | - Jae-Hoon Choi
- Department of Life Science, College of Natural Sciences, Hanyang University, Seoul, Republic of Korea
| | - Jin-Wu Nam
- Department of Life Science, College of Natural Sciences, Hanyang University, Seoul, Republic of Korea
| | - Hyung-Kwan Kim
- Cardiovascular Center, Seoul National University Hospital, Seoul, Republic of Korea.,Division of Cardiology, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
| | | | | | - Yong-Jin Kim
- Cardiovascular Center, Seoul National University Hospital, Seoul, Republic of Korea.,Division of Cardiology, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
| | | | - Seung-Pyo Lee
- Cardiovascular Center, Seoul National University Hospital, Seoul, Republic of Korea.,Division of Cardiology, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
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21
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Jahandideh A, Uotila S, Ståhle M, Virta J, Li XG, Kytö V, Marjamäki P, Liljenbäck H, Taimen P, Oikonen V, Lehtonen J, Mäyränpää MI, Chen Q, Low PS, Knuuti J, Roivainen A, Saraste A. Folate Receptor β-Targeted PET Imaging of Macrophages in Autoimmune Myocarditis. J Nucl Med 2020; 61:1643-1649. [PMID: 32284397 DOI: 10.2967/jnumed.119.241356] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Accepted: 02/26/2020] [Indexed: 12/12/2022] Open
Abstract
Currently available imaging techniques have limited specificity for the detection of active myocardial inflammation. Aluminum 18F-labeled 1,4,7-triazacyclononane-N,N',N″-triacetic acid conjugated folate (18F-FOL) is a PET tracer targeting folate receptor β (FR-β), which is expressed on activated macrophages at sites of inflammation. We evaluated 18F-FOL PET for the detection of myocardial inflammation in rats with autoimmune myocarditis and studied the expression of FR-β in human cardiac sarcoidosis specimens. Methods: Myocarditis was induced by immunizing rats (n = 18) with porcine cardiac myosin in complete Freund adjuvant. Control rats (n = 6) were injected with Freund adjuvant alone. 18F-FOL was intravenously injected, followed by imaging with a small-animal PET/CT scanner and autoradiography. Contrast-enhanced high-resolution CT or 18F-FDG PET images were used for coregistration. Rat tissue sections and myocardial autopsy samples from 6 patients with cardiac sarcoidosis were studied for macrophages and FR-β. Results: The myocardium of 10 of 18 immunized rats showed focal macrophage-rich inflammatory lesions, with FR-β expression occurring mainly in M1-polarized macrophages. PET images showed focal myocardial 18F-FOL uptake colocalizing with inflammatory lesions (SUVmean, 2.1 ± 1.1), whereas uptake in the remote myocardium of immunized rats and controls was low (SUVmean, 0.4 ± 0.2 and 0.4 ± 0.1, respectively; P < 0.01). Ex vivo autoradiography of tissue sections confirmed uptake of 18F-FOL in myocardial inflammatory lesions. Uptake of 18F-FOL in inflamed myocardium was efficiently blocked by a nonlabeled FR-β ligand folate glucosamine in vivo. The myocardium of patients with cardiac sarcoidosis showed many FR-β-positive macrophages in inflammatory lesions. Conclusion: In a rat model of autoimmune myocarditis, 18F-FOL shows specific uptake in inflamed myocardium containing macrophages expressing FR-β, which were also present in human cardiac sarcoid lesions. Imaging of FR-β expression is a potential approach for the detection of active myocardial inflammation.
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Affiliation(s)
- Arghavan Jahandideh
- Turku PET Centre, University of Turku, Turku, Finland.,Turku PET Centre, Turku University Hospital, Turku, Finland
| | - Sauli Uotila
- Turku PET Centre, University of Turku, Turku, Finland
| | - Mia Ståhle
- Turku PET Centre, University of Turku, Turku, Finland
| | - Jenni Virta
- Turku PET Centre, University of Turku, Turku, Finland
| | - Xiang-Guo Li
- Turku PET Centre, University of Turku, Turku, Finland.,Turku PET Centre, Åbo Akademi University, Turku, Finland
| | - Ville Kytö
- Heart Center, Turku University Hospital and University of Turku, Turku, Finland
| | | | - Heidi Liljenbäck
- Turku PET Centre, University of Turku, Turku, Finland.,Turku Center for Disease Modeling, University of Turku, Turku, Finland
| | - Pekka Taimen
- Institute of Biomedicine, University of Turku and Department of Pathology, Turku University Hospital, Turku, Finland
| | - Vesa Oikonen
- Turku PET Centre, University of Turku, Turku, Finland
| | - Jukka Lehtonen
- Heart and Lung Center, Helsinki University and Helsinki University Hospital, Helsinki, Finland
| | - Mikko I Mäyränpää
- Pathology, Helsinki University and Helsinki University Hospital, Helsinki, Finland; and
| | - Qingshou Chen
- Department of Chemistry, Purdue University, West Lafayette, Indiana
| | - Philip S Low
- Department of Chemistry, Purdue University, West Lafayette, Indiana
| | - Juhani Knuuti
- Turku PET Centre, University of Turku, Turku, Finland.,Turku PET Centre, Turku University Hospital, Turku, Finland
| | - Anne Roivainen
- Turku PET Centre, University of Turku, Turku, Finland.,Turku PET Centre, Turku University Hospital, Turku, Finland.,Turku Center for Disease Modeling, University of Turku, Turku, Finland
| | - Antti Saraste
- Turku PET Centre, University of Turku, Turku, Finland .,Turku PET Centre, Turku University Hospital, Turku, Finland.,Heart Center, Turku University Hospital and University of Turku, Turku, Finland
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22
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Rischpler C, Siebermair J, Kessler L, Quick HH, Umutlu L, Rassaf T, Antoch G, Herrmann K, Nensa F. Cardiac PET/MRI: Current Clinical Status and Future Perspectives. Semin Nucl Med 2020; 50:260-269. [PMID: 32284112 DOI: 10.1053/j.semnuclmed.2020.02.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Combined PET/MRI has now been in clinical routine for almost 10 years. Since then, it has not only had to face validation, comparison and research questions, it has also been increasingly used in clinical routine. A number of cardiovascular applications have become established here, whereby viability imaging and assessment of inflammatory and infiltrative processes in the heart are to be emphasized. However, further interesting applications are expected in the near future. This review summarizes the most important clinical applications on the one hand and mentions interesting areas of application in research on the other.
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Affiliation(s)
- Christoph Rischpler
- Department of Nuclear Medicine, University Hospital Essen, University of Duisburg-Essen, Essen, Germany.
| | - Johannes Siebermair
- Department of Cardiology and Vascular Medicine, University Hospital Essen, West German Heart and Vascular Center, University of Duisburg-Essen, Essen, Germany
| | - Lukas Kessler
- Department of Nuclear Medicine, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Harald H Quick
- High-Field and Hybrid MR Imaging, University Hospital Essen, Essen, Germany; Erwin L Hahn Institute for Magnetic Resonance Imaging, University Duisburg-Essen, Essen, Germany
| | - Lale Umutlu
- Department of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Tienush Rassaf
- Department of Cardiology and Vascular Medicine, University Hospital Essen, West German Heart and Vascular Center, University of Duisburg-Essen, Essen, Germany
| | - Gerald Antoch
- Department of Diagnostic and Interventional Radiology, Medical Faculty, University Düsseldorf, Düsseldorf, Germany
| | - Ken Herrmann
- Department of Nuclear Medicine, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Felix Nensa
- Department of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
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23
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24
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Abstract
This review discusses nuclear imaging of inflammation using molecular probes beyond fluoro-d-glucose, is structured by cellular targets, and focuses on those tracers that have been successfully applied clinically.
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Affiliation(s)
- Malte Kircher
- Department of Nuclear Medicine, University Hospital Augsburg, Stenglinstr. 2, Würzburg 86156, Germany
| | - Constantin Lapa
- Department of Nuclear Medicine, University Hospital Augsburg, Stenglinstr. 2, Würzburg 86156, Germany.
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25
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Lee JY, Kim HY, Lee YS, Seo HY, Park JY, Jeong JM. Preparation of a multi-modal agent for sentinel lymph node mapping using Evans blue and 99mTc-labeled mannosylated human serum albumin conjugate. Nucl Med Biol 2020; 84-85:38-45. [PMID: 32044560 DOI: 10.1016/j.nucmedbio.2020.02.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 12/27/2019] [Accepted: 02/02/2020] [Indexed: 02/06/2023]
Abstract
INTRODUCTION The identification of sentinel lymph nodes (SLNs) is important in deciding the resection range during surgery. 99mTc-labeled mannosylated human serum albumin ([99mTc]Tc-MSA) is a radiopharmaceutical developed for SLN detection by targeting macrophages. Evans blue (EB) is a blue dye binding strongly to albumin and has been used for SLN detection. [99mTc]Tc-MSA-EB conjugate was prepared as a multi-modal imaging agent and tested its performance by visual investigation, fluorescence imaging and SPECT/CT for SLN mapping in mice. METHODS EB was mixed with various concentration of MSA to prepare MSA-EB conjugates. The binding efficiencies were determined using thin-layer chromatography. The UV-VIS spectra and molar extinction coefficient of the conjugate were obtained. The fluorescence was monitored at the excitation wavelength range 420-780 nm and the emission wavelength range 520-845 nm. The [99mTc]Tc-MSA-EB conjugate and EB were injected into the footpads of normal BALB/c mice to check the lymph node (LN) uptakes. The visible, fluorescence, and SPECT/CT images were obtained after injection. RESULTS The conjugation of EB with MSA increased by time and was saturated within 10 min. The molar extinction coefficient of the conjugate was 99,259.3/M/cm at 620 nm. The uptake of conjugate into the popliteal LN after injection into the footpads of mice was investigated visually and fluorescence imaging. SPECT/CT images showed that the standardized uptake values of [99mTc]Tc-MSA-EB conjugate in popliteal LN were about 4 times higher than in sciatic LN at all timepoints. It was confirmed by investigating resected LN that the blue color, fluorescence, and radioactivity of the [99mTc]Tc-MSA-EB conjugate were retained only on the LN and did not spread to adjoining tissues. CONCLUSION [99mTc]Tc-MSA-EB conjugate has a great potential as a multi-modal SLN mapping agent which could be detected by visual investigation, fluorescence imaging, and SPECT/CT.
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Affiliation(s)
- Ji Youn Lee
- Department of Nuclear Medicine, Institute of Radiation Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea; Department of Radiology, University of Pennsylvania, Philadelphia, USA
| | - Ho Young Kim
- Department of Nuclear Medicine, Institute of Radiation Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea; Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea; Department of Radiology, University of Pennsylvania, Philadelphia, USA
| | - Yun-Sang Lee
- Department of Nuclear Medicine, Institute of Radiation Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea; Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Hye Yeon Seo
- Department of Nuclear Medicine, Institute of Radiation Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea; Department of Biomedical Sciences, Seoul National University Graduate School, Seoul, Republic of Korea
| | - Ji Yong Park
- Department of Nuclear Medicine, Institute of Radiation Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea; Department of Biomedical Sciences, Seoul National University Graduate School, Seoul, Republic of Korea
| | - Jae Min Jeong
- Department of Nuclear Medicine, Institute of Radiation Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea; Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea.
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26
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Um W, Park J, Youn A, Cho H, Lim S, Lee JW, Yoon HY, Lim DK, Park JH, Kim K. A Comparative Study on Albumin-Binding Molecules for Targeted Tumor Delivery through Covalent and Noncovalent Approach. Bioconjug Chem 2019; 30:3107-3118. [DOI: 10.1021/acs.bioconjchem.9b00760] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Wooram Um
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
- Department of Health Sciences and Technology, SAIHST, Sungkyunkwan University, Seoul 06351, Republic of Korea
| | - Jooho Park
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Ahye Youn
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Hanhee Cho
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Seungho Lim
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Jong Won Lee
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Republic of Korea
| | - Hong Yeol Yoon
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Dong-Kwon Lim
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Republic of Korea
| | - Jae Hyung Park
- Department of Health Sciences and Technology, SAIHST, Sungkyunkwan University, Seoul 06351, Republic of Korea
- School of Chemical Engineering, College of Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Kwangmeyung Kim
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Republic of Korea
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27
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Werner RA, Wakabayashi H, Bauer J, Schütz C, Zechmeister C, Hayakawa N, Javadi MS, Lapa C, Jahns R, Ergün S, Jahns V, Higuchi T. Longitudinal 18F-FDG PET imaging in a rat model of autoimmune myocarditis. Eur Heart J Cardiovasc Imaging 2019; 20:467-474. [PMID: 30102319 PMCID: PMC6429237 DOI: 10.1093/ehjci/jey119] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 05/25/2018] [Accepted: 07/24/2018] [Indexed: 12/21/2022] Open
Abstract
AIMS Although mortality rate is very high, diagnosis of acute myocarditis remains challenging with conventional tests. We aimed to elucidate the potential role of longitudinal 2-Deoxy-2-18F-fluoro-D-glucose (18F-FDG) positron emission tomography (PET) inflammation monitoring in a rat model of experimental autoimmune myocarditis. METHODS AND RESULTS Autoimmune myocarditis was induced in Lewis rats by immunizing with porcine cardiac myosin emulsified in complete Freund's adjuvant. Time course of disease was assessed by longitudinal 18F-FDG PET imaging. A correlative analysis between in- and ex vivo18F-FDG signalling and macrophage infiltration using CD68 staining was conducted. Finally, immunohistochemistry analysis of the cell-adhesion markers CD34 and CD44 was performed at different disease stages determined by longitudinal 18F-FDG PET imaging. After immunization, myocarditis rats revealed a temporal increase in 18F-FDG uptake (peaked at week 3), which was followed by a rapid decline thereafter. Localization of CD68 positive cells was well correlated with in vivo18F-FDG PET signalling (R2 = 0.92) as well as with ex vivo18F-FDG autoradiography (R2 = 0.9, P < 0.001, respectively). CD44 positivity was primarily observed at tissue samples obtained at acute phase (i.e. at peak 18F-FDG uptake), while CD34-positive staining areas were predominantly identified in samples harvested at both sub-acute and chronic phases (i.e. at 18F-FDG decrease). CONCLUSION 18F-FDG PET imaging can provide non-invasive serial monitoring of cardiac inflammation in a rat model of acute myocarditis.
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Affiliation(s)
- Rudolf A Werner
- Division of Nuclear Medicine and Molecular Imaging, The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, 601 N. Caroline Street, Baltimore, MD, USA.,Department of Nuclear Medicine, University Hospital Würzburg, Oberdürrbacherstr. 6, Würzburg, Germany.,Else-Kröner-Forschungskolleg, Interdisciplinary Center for Clinical Research (IZKF), University of Würzburg, Josef-Schneider-Str. 2, Würzburg, Germany.,Comprehensive Heart Failure Center (CHFC), University Hospital Würzburg, Am Schwarzenberg 15, Würzburg, Germany
| | - Hiroshi Wakabayashi
- Department of Nuclear Medicine, University Hospital Würzburg, Oberdürrbacherstr. 6, Würzburg, Germany.,Comprehensive Heart Failure Center (CHFC), University Hospital Würzburg, Am Schwarzenberg 15, Würzburg, Germany
| | - Jochen Bauer
- Institute for Anatomy and Cell Biology, University Würzburg, Koellikerstr. 6, Würzburg, Germany
| | - Claudia Schütz
- Department of Pharmacology, University Hospital Würzburg, Versbacher Str. 9, Würzburg, Germany
| | - Christina Zechmeister
- Department of Pharmacology, University Hospital Würzburg, Versbacher Str. 9, Würzburg, Germany
| | - Nobuyuki Hayakawa
- Department of Nuclear Medicine, University Hospital Würzburg, Oberdürrbacherstr. 6, Würzburg, Germany.,Comprehensive Heart Failure Center (CHFC), University Hospital Würzburg, Am Schwarzenberg 15, Würzburg, Germany
| | - Mehrbod S Javadi
- Division of Nuclear Medicine and Molecular Imaging, The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, 601 N. Caroline Street, Baltimore, MD, USA
| | - Constantin Lapa
- Department of Nuclear Medicine, University Hospital Würzburg, Oberdürrbacherstr. 6, Würzburg, Germany
| | - Roland Jahns
- Comprehensive Heart Failure Center (CHFC), University Hospital Würzburg, Am Schwarzenberg 15, Würzburg, Germany.,Interdisciplinary Bank of Biomaterials and Data Würzburg (IBDW), University Hospital Würzburg, Straubmühlweg 2a, Würzburg, Germany
| | - Süleyman Ergün
- Institute for Anatomy and Cell Biology, University Würzburg, Koellikerstr. 6, Würzburg, Germany
| | - Valerie Jahns
- Comprehensive Heart Failure Center (CHFC), University Hospital Würzburg, Am Schwarzenberg 15, Würzburg, Germany.,Department of Pharmacology, University Hospital Würzburg, Versbacher Str. 9, Würzburg, Germany
| | - Takahiro Higuchi
- Department of Nuclear Medicine, University Hospital Würzburg, Oberdürrbacherstr. 6, Würzburg, Germany.,Comprehensive Heart Failure Center (CHFC), University Hospital Würzburg, Am Schwarzenberg 15, Würzburg, Germany.,Department of Biomedical Imaging, National Cerebral and Cardiovascular Research Center, 5 Chome-7-1 Fujishirodai, Suita, Osaka Prefecture, Japan
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28
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Early Detection of Localized Immunity in Experimental Autoimmune Myocarditis Using [ 99mTc]Fucoidan SPECT. Mol Imaging Biol 2019; 22:643-652. [PMID: 31432389 DOI: 10.1007/s11307-019-01420-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
PURPOSE The aim of the study was to evaluate the ability of technetium-99m-fucoidan ([99mTc]fucoidan), a molecular imaging agent specific for selectins, in the assessment of early localized immunity in a rat model of experimental autoimmune myocarditis (EAM). PROCEDURES EAM was induced in Lewis rats and troponin T; brain natriuretic peptide (BNP) and anti-myosin antibodies were measured in plasma. Separately, [99mTc]fucoidan single-photon emission computed tomography (SPECT)/x-ray computed tomography (CT) was performed in the very early phase of myocarditis at 10, 15, and 21 days after immunization. Then, hearts were collected and used for autoradiography, well counting, histology, and flow cytometry analysis. RESULTS The EAM acute phase is characterized by extensive myocardial necrosis, release of troponin and BNP, and pericardial effusion. [99mTc]Fucoidan uptake was significantly increased in EAM compared with controls starting from D15. There was a close relationship between uptake of the tracer and myocardial content in CD45+, CD8+, CD11b+, and CD31+ cells. CONCLUSIONS [99mTc]Fucoidan SPECT/CT accurately diagnosed the autoimmune attack in the early steps of EAM and could be used to monitor disease evolution and therapy efficiency.
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29
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Park JY, Song MG, Kim WH, Kim KW, Lodhi NA, Choi JY, Kim YJ, Kim JY, Chung H, Oh C, Lee YS, Kang KW, Im HJ, Seok SH, Lee DS, Kim EE, Jeong JM. Versatile and Finely Tuned Albumin Nanoplatform based on Click Chemistry. Theranostics 2019; 9:3398-3409. [PMID: 31281486 PMCID: PMC6587158 DOI: 10.7150/thno.33143] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Accepted: 04/30/2019] [Indexed: 12/21/2022] Open
Abstract
Albumin is one of the most attractive nanoplatforms for targeted imaging and drug delivery due to its biocompatibility and long circulation half-life. However, previously reported albumin-based nanoplatforms have shown inconsistent blood circulation half-life according to the modified methods, and the affecting factors were not well evaluated, which could hamper the clinical translation of albumin-based nanoplatforms. Herein, we developed a finely tuned click-chemistry based albumin nanoplatform (CAN) with a longer circulation half-life and an efficient tumor targeting ability. Methods: CAN was synthesized in two steps. First, albumin was conjugated with ADIBO-NHS (albumin-ADIBO) by reacting albumin with various molar ratios of ADIBO. The number of attached ADIBO moieties was determined using matrix-assisted laser desorption ionization time of flight (MALDI-TOF). Second, the desired modalities including azide-functionalized chelator, a fluorescence dye, and folate were incorporated into albumin-ADIBO using strain-promoted alkyne-azide cycloaddition reaction (SPAAC reaction). The biodistribution and targeting efficiency of functionalized CANs were demonstrated in mice. Results: The degree of functionalization (DOF) and resulting in vivo biodistribution was controlled precisely using the click chemistry approach. Specifically, the numbers of attached azadibenzocyclooctyne (ADIBO) moieties on albumin, the DOF, were optimized by reacting albumin with varying molar ratios of ADIBO with a high reproducibility. Furthermore, we developed a simple and efficient method to estimate the DOF using UV-visible spectrophotometry (UV-vis), which was further validated by matrix-assisted laser desorption ionization time of flight (MALDI-TOF). The biodistribution of CAN could be controlled by DOF, and CAN with an optimized DOF showed a long circulation half-life (> 18 h). CAN was further functionalized using a simple click chemistry reaction with an azide functionalized chelator, a fluorescence dye, and folate. 64Cu- and folate-labeled CAN (64Cu-CAN-FA) showed effective and specific folate receptor targeting in vivo, with an over two-fold higher uptake than the liver at 24 h post-injection. Conclusions: Our development from the precisely controlled DOF demonstrates that an optimized CAN can be used as a multifunctional nanoplatform to obtain a longer half-life with radioisotopes and ligands, and provides an effective method for the development of albumin-based tumor theranostic agents.
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Affiliation(s)
- Ji Yong Park
- Department of Nuclear Medicine, Seoul National University Hospital, College of Medicine, Seoul, South Korea
- Department of Biomedical Sciences, Seoul National University, Seoul, South Korea
| | - Myung Geun Song
- Department of Nuclear Medicine, Seoul National University Hospital, College of Medicine, Seoul, South Korea
- Biomedical Research Institute, Seoul National University Hospital, Seoul, South Korea
| | - Woo Hyoung Kim
- Division of Pharmaceuticals and Clinical Development, DawonMedax Co., Ltd., Seoul, South Korea
| | - Kyu Wan Kim
- Department of Nuclear Medicine, Seoul National University Hospital, College of Medicine, Seoul, South Korea
| | - Nadeem Ahmed Lodhi
- Department of Nuclear Medicine, Seoul National University Hospital, College of Medicine, Seoul, South Korea
- Isotope Production Division, Pakistan Institute of Nuclear Science & Technology (PINSTECH), P. O, Nilore, Islamabad
| | - Jin Yeong Choi
- Graduate School of Convergence Science and Technology, Seoul National University, Seoul, South Korea
| | - Young Ju Kim
- Department of Nuclear Medicine, Seoul National University Hospital, College of Medicine, Seoul, South Korea
- Radiation Medicine Research Institute, Seoul National University College of Medicine, Seoul, South Korea
- Cancer Research Institute, Seoul National University, Seoul, South Korea
| | - Jung Young Kim
- Department of RI Technology-Convergence, Korean Institute of Radiological & Medical Sciences (KIRAMS), Seoul, South Korea
| | - Hyewon Chung
- Department of Microbiology and Immunology, Institute of Endemic Disease, College of Medicine, Seoul National University, Seoul, South Korea
| | - Chiwoo Oh
- Graduate School of Convergence Science and Technology, Seoul National University, Seoul, South Korea
| | - Yun-Sang Lee
- Department of Nuclear Medicine, Seoul National University Hospital, College of Medicine, Seoul, South Korea
- Radiation Medicine Research Institute, Seoul National University College of Medicine, Seoul, South Korea
| | - Keon Wook Kang
- Department of Nuclear Medicine, Seoul National University Hospital, College of Medicine, Seoul, South Korea
- Radiation Medicine Research Institute, Seoul National University College of Medicine, Seoul, South Korea
- Cancer Research Institute, Seoul National University, Seoul, South Korea
| | - Hyung-Jun Im
- Graduate School of Convergence Science and Technology, Seoul National University, Seoul, South Korea
| | - Seung Hyeok Seok
- Department of Microbiology and Immunology, Institute of Endemic Disease, College of Medicine, Seoul National University, Seoul, South Korea
| | - Dong Soo Lee
- Department of Nuclear Medicine, Seoul National University Hospital, College of Medicine, Seoul, South Korea
- Graduate School of Convergence Science and Technology, Seoul National University, Seoul, South Korea
| | - Edmund E. Kim
- Department of Nuclear Medicine, Seoul National University Hospital, College of Medicine, Seoul, South Korea
| | - Jae Min Jeong
- Department of Nuclear Medicine, Seoul National University Hospital, College of Medicine, Seoul, South Korea
- Radiation Medicine Research Institute, Seoul National University College of Medicine, Seoul, South Korea
- Cancer Research Institute, Seoul National University, Seoul, South Korea
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30
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Li C, Wang X, Song H, Deng S, Li W, Li J, Sun J. Current multifunctional albumin-based nanoplatforms for cancer multi-mode therapy. Asian J Pharm Sci 2019; 15:1-12. [PMID: 32175014 PMCID: PMC7066042 DOI: 10.1016/j.ajps.2018.12.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2018] [Revised: 12/16/2018] [Accepted: 12/26/2018] [Indexed: 02/07/2023] Open
Abstract
Albumin has been widely applied for rational design of drug delivery complexes as natural carriers in cancer therapy due to its distinct advantages of biocompatibility, abundance, low toxicity and versatile property. Hence, various types of multifunctional albumin-based nanoplatforms (MAlb-NPs) that adopt multiple imaging and therapeutic techniques have been developed for cancer diagnosis and treatment. Stimuli-responsive release, including reduction-sensitive, pH-responsive, concentration-dependent and photodynamic-triggered, is important to achieve low-toxicity cancer therapy. Several types of imaging techniques can synergistically improve the effectiveness of cancer therapy. Therefore, combinational theranostic is considered to be a prospective strategy to improve treatment efficiency, minimize side effects and reduce drug resistance, which has received tremendous attentions in recent years. In this review, we highlight several stimuli-responsive albumin nanoplatforms for combinational theranostic.
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Affiliation(s)
- Chang Li
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Xin Wang
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Hang Song
- College of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Shuai Deng
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Wei Li
- Department of Pharmaceutical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
| | - Jing Li
- School of Basic Medical Science, Shenyang Medical College, Shenyang 110034, China
- Corresponding authors: Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China. Tel.: +86 24 23986325.
| | - Jin Sun
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China
- Corresponding authors: Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China. Tel.: +86 24 23986325.
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Lee JY, Kim HY, Lee YS, Jeong JM. Naphthol Blue Black and 99mTc-Labeled Mannosylated Human Serum Albumin ( 99mTc-MSA) Conjugate as a Multimodal Lymph Node Mapping Nanocarrier. Sci Rep 2018; 8:13636. [PMID: 30206287 PMCID: PMC6134003 DOI: 10.1038/s41598-018-31933-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Accepted: 08/24/2018] [Indexed: 02/01/2023] Open
Abstract
99mTc-labeled mannosylated human serum albumin (MSA) has been reported as a sentinel lymph node (SLN)-imaging agent by binding to macrophages in the LNs. By conjugating it with blue dye, we developed a new multimodal radio-nanocarrier by visual investigation, fluorescence imaging, and single photon emission computed tomography (SPECT)/computed tomography (CT). Binding affinities of seven blue dyes to MSA were tested. According to the spectroscopic study and visual inspection of MSA-bound dyes, naphthol blue black (NBB) was selected as the best candidate of multimodal agent. Thus, 99mTc-MSA-NBB conjugate was prepared and further investigated using mice. After footpad injection, it showed high popliteal LN accumulation at 1 h. SPECT/CT also showed high popliteal as well as inguinal LN uptakes at 10 min that sustained until 2 h. In conclusion, we prepared a multimodal SLN imaging radio-nanocarrier, 99mTc-MSA-NBB conjugate, and confirmed its excellency as a multimodal probe for SLN mapping.
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Affiliation(s)
- Ji Youn Lee
- Department of Nuclear Medicine, Institute of Radiation Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea.,Department of Biomedical Sciences, Seoul National University Graduate School, Seoul, Republic of Korea
| | - Ho Young Kim
- Department of Nuclear Medicine, Institute of Radiation Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Yun-Sang Lee
- Department of Nuclear Medicine, Institute of Radiation Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Jae Min Jeong
- Department of Nuclear Medicine, Institute of Radiation Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea. .,Department of Biomedical Sciences, Seoul National University Graduate School, Seoul, Republic of Korea. .,Cancer Research Institute, Seoul National University, Seoul, Republic of Korea.
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Davidson CQ, Phenix CP, Tai TC, Khaper N, Lees SJ. Searching for novel PET radiotracers: imaging cardiac perfusion, metabolism and inflammation. AMERICAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING 2018; 8:200-227. [PMID: 30042871 PMCID: PMC6056242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Accepted: 05/20/2018] [Indexed: 06/08/2023]
Abstract
Advances in medical imaging technology have led to an increased demand for radiopharmaceuticals for early and accurate diagnosis of cardiac function and diseased states. Myocardial perfusion, metabolism, and hypoxia positron emission tomography (PET) imaging radiotracers for detection of cardiac disease lack specificity for targeting inflammation that can be an early indicator of cardiac disease. Inflammation can occur at all stages of cardiac disease and currently, 18F-fluorodeoxyglucose (FDG), a glucose analog, is the standard for detecting myocardial inflammation. 18F-FDG has many ideal characteristics of a radiotracer but lacks the ability to differentiate between glucose uptake in normal cardiomyocytes and inflammatory cells. Developing a PET radiotracer that differentiates not only between inflammatory cells and normal cardiomyocytes, but between types of immune cells involved in inflammation would be ideal. This article reviews current PET radiotracers used in cardiac imaging, their limitations, and potential radiotracer candidates for imaging cardiac inflammation in early stages of development of acute and chronic cardiac diseases. The select radiotracers reviewed have been tested in animals and/or show potential to be developed as a radiotracer for the detection of cardiac inflammation by targeting the enzymatic activities or subpopulations of macrophages that are recruited to an injured or infected site.
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Affiliation(s)
| | - Christopher P Phenix
- Department of Chemistry, University of SaskatchewanSaskatoon, Saskatchewan, Canada
| | - TC Tai
- Medical Sciences Division, Northern Ontario School of Medicine, Laurentian UniversitySudbury, Ontario, Canada
| | - Neelam Khaper
- Department of Biology, Lakehead UniversityThunder Bay, Ontario, Canada
- Medical Sciences Division, Northern Ontario School of Medicine, Lakehead UniversityThunder Bay, Ontario, Canada
| | - Simon J Lees
- Department of Biology, Lakehead UniversityThunder Bay, Ontario, Canada
- Medical Sciences Division, Northern Ontario School of Medicine, Lakehead UniversityThunder Bay, Ontario, Canada
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Neupane B, Zhou Q, Gawaz M, Gramlich M. Personalized medicine in inflammatory cardiomyopathy. Per Med 2018; 15:127-136. [PMID: 29714129 DOI: 10.2217/pme-2017-0074] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Inflammatory cardiomyopathy is the result of persistent myocardial inflammation which can arise from both infectious or noninfectious causes. While most patients with acute myocarditis recover, up to 20% develop inflammatory cardiomyopathy with chronic heart failure. The interaction between host factors and factors of the agent that triggered myocardial inflammation must be considered to fully understand the individual mechanism of disease. Several inflammatory biomarkers, histology, immunohistochemistry, advanced imaging technologies as well as molecular high-throughput sequencing techniques help to identify disease pathways and to establish a comprehensive, individualized treatment approach, which can include anti-inflammatory medication, antiviral drugs and heart failure therapy. This might help to prevent transition from acute inflammation to persistent heart failure and to restore cardiac function.
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Affiliation(s)
- Balram Neupane
- Department of Cardiology & Cardiovascular Diseases, Eberhard Karls University, Tübingen, Germany
| | - Qifeng Zhou
- Department of Cardiology & Cardiovascular Diseases, Eberhard Karls University, Tübingen, Germany
| | - Meinrad Gawaz
- Department of Cardiology & Cardiovascular Diseases, Eberhard Karls University, Tübingen, Germany
| | - Michael Gramlich
- Department of Cardiology & Cardiovascular Diseases, Eberhard Karls University, Tübingen, Germany
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Assessment of TSPO in a Rat Experimental Autoimmune Myocarditis Model: A Comparison Study between [ 18F]Fluoromethyl-PBR28 and [ 18F]CB251. Int J Mol Sci 2018; 19:ijms19010276. [PMID: 29342117 PMCID: PMC5796222 DOI: 10.3390/ijms19010276] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 01/11/2018] [Accepted: 01/15/2018] [Indexed: 01/03/2023] Open
Abstract
Overexpression of the 18-kDa translocator protein (TSPO) is closely linked to inflammatory responses in the heart, including myocarditis, which can lead to myocardial necrosis. In vivo assessment of inflammatory responses has enabled the precise diagnosis of myocarditis to improve clinical outcomes. Here, we evaluated TSPO overexpression in a rat model of experimental autoimmune myocarditis (EAM) compared to healthy rats using two TSPO radiotracers, [18F]fluoromethyl-PBR28 ([18F]1) and [18F]CB251 ([18F]2). All radiolabeling methods were successfully applied to an automated module for the reproducible preparation of TSPO radiotracers. Both radiotracers were directly compared in an EAM rat model, as well as in healthy rats to determine whether either radiotracer provides a more promising assessment of in vivo TSPO overexpression. [18F]2 provided more specific TSPO-uptake in the heart of the EAM rats (1.32-fold that of the heart-to-lung uptake ratio versus healthy controls), while [18F]1 did not show a significant difference between the two groups. Histopathological characterization revealed that a prominent positron emission tomography (PET) signal of [18F]2 in the EAM rats corresponded to the presence of a higher density of TSPO compared to the healthy controls. These results suggest that the imidazole[1,2-a]pyridine-based radiotracer [18F]2 is a sensitive tool for noninvasively diagnosing myocarditis related to inflammation of the heart muscle by assessing abnormal TSPO expression.
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Prospective of 68Ga Radionuclide Contribution to the Development of Imaging Agents for Infection and Inflammation. CONTRAST MEDIA & MOLECULAR IMAGING 2018. [PMID: 29531507 PMCID: PMC5817300 DOI: 10.1155/2018/9713691] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
During the last decade, the utilization of 68Ga for the development of imaging agents has increased considerably with the leading position in the oncology. The imaging of infection and inflammation is lagging despite strong unmet medical needs. This review presents the potential routes for the development of 68Ga-based agents for the imaging and quantification of infection and inflammation in various diseases and connection of the diagnosis to the treatment for the individualized patient management.
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