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Jacqmarcq C, Picot A, Flon J, Lebrun F, Martinez de Lizarrondo S, Naveau M, Bernay B, Goux D, Rubio M, Malzert-Fréon A, Michel A, Proamer F, Mangin P, Gauberti M, Vivien D, Bonnard T. MRI-based microthrombi detection in stroke with polydopamine iron oxide. Nat Commun 2024; 15:5070. [PMID: 38871729 DOI: 10.1038/s41467-024-49480-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Accepted: 06/05/2024] [Indexed: 06/15/2024] Open
Abstract
In acute ischemic stroke, even when successful recanalization is obtained, downstream microcirculation may still be obstructed by microvascular thrombosis, which is associated with compromised brain reperfusion and cognitive decline. Identifying these microthrombi through non-invasive methods remains challenging. We developed the PHySIOMIC (Polydopamine Hybridized Self-assembled Iron Oxide Mussel Inspired Clusters), a MRI-based contrast agent that unmasks these microthrombi. In a mouse model of thromboembolic ischemic stroke, our findings demonstrate that the PHySIOMIC generate a distinct hypointense signal on T2*-weighted MRI in the presence of microthrombi, that correlates with the lesion areas observed 24 hours post-stroke. Our microfluidic studies reveal the role of fibrinogen in the protein corona for the thrombosis targeting properties. Finally, we observe the biodegradation and biocompatibility of these particles. This work demonstrates that the PHySIOMIC particles offer an innovative and valuable tool for non-invasive in vivo diagnosis and monitoring of microthrombi, using MRI during ischemic stroke.
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Affiliation(s)
- Charlène Jacqmarcq
- Normandie University, UNICAEN, Université Caen Normandie, INSERM UMR-S U1237, Physiopathology and Imaging of Neurological Disorders (PhIND), GIP Cyceron, Institute Blood and Brain @ Caen-Normandie (BB@C), Caen, France
| | - Audrey Picot
- Normandie University, UNICAEN, Université Caen Normandie, INSERM UMR-S U1237, Physiopathology and Imaging of Neurological Disorders (PhIND), GIP Cyceron, Institute Blood and Brain @ Caen-Normandie (BB@C), Caen, France
| | - Jules Flon
- Normandie University, UNICAEN, Université Caen Normandie, INSERM UMR-S U1237, Physiopathology and Imaging of Neurological Disorders (PhIND), GIP Cyceron, Institute Blood and Brain @ Caen-Normandie (BB@C), Caen, France
| | - Florent Lebrun
- Normandie University, UNICAEN, Université Caen Normandie, INSERM UMR-S U1237, Physiopathology and Imaging of Neurological Disorders (PhIND), GIP Cyceron, Institute Blood and Brain @ Caen-Normandie (BB@C), Caen, France
| | - Sara Martinez de Lizarrondo
- Normandie University, UNICAEN, Université Caen Normandie, INSERM UMR-S U1237, Physiopathology and Imaging of Neurological Disorders (PhIND), GIP Cyceron, Institute Blood and Brain @ Caen-Normandie (BB@C), Caen, France
| | - Mikaël Naveau
- Normandie University, UNICAEN, Université Caen Normandie, CNRS UMS 3408, Caen, France
| | - Benoît Bernay
- Normandie University, UNICAEN, Université Caen Normandie, SF 4206 ICORE, Plateforme Proteogen, Caen, France
| | - Didier Goux
- Normandie University, UNICAEN, Université Caen Normandie, US EMerode, CMAbio3: Centre de Microscopie Appliquée à la Biologie, Caen, France
| | - Marina Rubio
- Normandie University, UNICAEN, Université Caen Normandie, INSERM UMR-S U1237, Physiopathology and Imaging of Neurological Disorders (PhIND), GIP Cyceron, Institute Blood and Brain @ Caen-Normandie (BB@C), Caen, France
| | - Aurélie Malzert-Fréon
- Normandie University, UNICAEN, Université Caen Normandie, EA 4258, CERMN: Centre d'études et de recherche sur le médicament de Normandie, Caen, France
| | - Anita Michel
- University of Strasbourg, INSERM, EFS Grand-Est, BPPS UMR-S1255, FMTS, F-67065, Strasbourg, France
| | - Fabienne Proamer
- University of Strasbourg, INSERM, EFS Grand-Est, BPPS UMR-S1255, FMTS, F-67065, Strasbourg, France
| | - Pierre Mangin
- University of Strasbourg, INSERM, EFS Grand-Est, BPPS UMR-S1255, FMTS, F-67065, Strasbourg, France
| | - Maxime Gauberti
- Normandie University, UNICAEN, Université Caen Normandie, INSERM UMR-S U1237, Physiopathology and Imaging of Neurological Disorders (PhIND), GIP Cyceron, Institute Blood and Brain @ Caen-Normandie (BB@C), Caen, France
- Centre Hospitalier Universitaire Caen, Department of Diagnostic Imaging and Interventional Radiology, Caen, France
| | - Denis Vivien
- Normandie University, UNICAEN, Université Caen Normandie, INSERM UMR-S U1237, Physiopathology and Imaging of Neurological Disorders (PhIND), GIP Cyceron, Institute Blood and Brain @ Caen-Normandie (BB@C), Caen, France.
- Centre Hospitalier Universitaire Caen, Department of Clinical Research, Caen, France.
| | - Thomas Bonnard
- Normandie University, UNICAEN, Université Caen Normandie, INSERM UMR-S U1237, Physiopathology and Imaging of Neurological Disorders (PhIND), GIP Cyceron, Institute Blood and Brain @ Caen-Normandie (BB@C), Caen, France.
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2
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Reiss S, Thielmann J, Fischer J, Lottner T, Maier A, Westermann D, von Zur Mühlen C, Heidt T, Bock M. Combination of high resolution MRI with 3D-printed needle guides for ex vivo myocardial biopsies. Sci Rep 2024; 14:606. [PMID: 38182761 PMCID: PMC10770147 DOI: 10.1038/s41598-023-50943-2] [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: 09/20/2023] [Accepted: 12/28/2023] [Indexed: 01/07/2024] Open
Abstract
Magnetic resonance imaging (MRI) provides a multitude of techniques to detect and characterize myocardial infarction. To correlate MRI findings with histology, in most cases terminal animal studies are performed; however, precise extraction and spatial correlation of myocardial tissue samples to MRI image data is difficult. In this proof of concept study, we present a 3D-printing technique to facilitate the extraction of tissue samples from myocardial regions. Initially, seven pig hearts embedded in formaldehyde were imaged on a clinical 3 T system to define biopsy targets on high resolution ex vivo images. Magnitude images and R2*-maps acquired with a 3D multi-echo gradient echo sequence and 0.58 mm isotropic resolution were used to create digital models of the cardiac anatomy. Biopsy guides were 3D-printed to steer the extraction of myocardial samples. In total, 61 tissue samples were extracted with an average offset of the tissue sample location from the target location of 0.59 ± 0.36 mm. This offset was not dependent on the distance of the target point to the epicardial surface. Myocardial tissue could be extracted from all samples. The presented method enables extraction of myocardial tissue samples that are selected by ex vivo MRI with submillimeter precision.
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Affiliation(s)
- Simon Reiss
- Division of Medical Physics, Department of Diagnostic and Interventional Radiology, Faculty of Medicine, University Medical Center Freiburg, University of Freiburg, Killianstr. 5a, 79106, Freiburg, Germany.
| | - Julien Thielmann
- Department of Cardiology and Angiology, Faculty of Medicine, University Heart Center Freiburg-Bad Krozingen, University of Freiburg, Freiburg, Germany
| | - Johannes Fischer
- Division of Medical Physics, Department of Diagnostic and Interventional Radiology, Faculty of Medicine, University Medical Center Freiburg, University of Freiburg, Killianstr. 5a, 79106, Freiburg, Germany
| | - Thomas Lottner
- Division of Medical Physics, Department of Diagnostic and Interventional Radiology, Faculty of Medicine, University Medical Center Freiburg, University of Freiburg, Killianstr. 5a, 79106, Freiburg, Germany
| | - Alexander Maier
- Department of Cardiology and Angiology, Faculty of Medicine, University Heart Center Freiburg-Bad Krozingen, University of Freiburg, Freiburg, Germany
| | - Dirk Westermann
- Department of Cardiology and Angiology, Faculty of Medicine, University Heart Center Freiburg-Bad Krozingen, University of Freiburg, Freiburg, Germany
| | - Constantin von Zur Mühlen
- Department of Cardiology and Angiology, Faculty of Medicine, University Heart Center Freiburg-Bad Krozingen, University of Freiburg, Freiburg, Germany
| | - Timo Heidt
- Department of Cardiology and Angiology, Faculty of Medicine, University Heart Center Freiburg-Bad Krozingen, University of Freiburg, Freiburg, Germany
| | - Michael Bock
- Division of Medical Physics, Department of Diagnostic and Interventional Radiology, Faculty of Medicine, University Medical Center Freiburg, University of Freiburg, Killianstr. 5a, 79106, Freiburg, Germany
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3
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Temme S, Kleimann P, Grandoch M, Wang X, Peter K, Simon F, Schrader J, Flögel U. Aktives Targeting zur Visualisierung von thrombotischen Prozessen mittels 19F-MRT. GEFÄSSCHIRURGIE 2022. [DOI: 10.1007/s00772-022-00961-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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4
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Martinez de Lizarrondo S, Jacqmarcq C, Naveau M, Navarro-Oviedo M, Pedron S, Adam A, Freis B, Allouche S, Goux D, Razafindrakoto S, Gazeau F, Mertz D, Vivien D, Bonnard T, Gauberti M. Tracking the immune response by MRI using biodegradable and ultrasensitive microprobes. SCIENCE ADVANCES 2022; 8:eabm3596. [PMID: 35857494 PMCID: PMC9278862 DOI: 10.1126/sciadv.abm3596] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Accepted: 05/26/2022] [Indexed: 06/03/2023]
Abstract
Molecular magnetic resonance imaging (MRI) holds great promise for diagnosis and therapeutic monitoring in a wide range of diseases. However, the low intrinsic sensitivity of MRI to detect exogenous contrast agents and the lack of biodegradable microprobes have prevented its clinical development. Here, we synthetized a contrast agent for molecular MRI based on a previously unknown mechanism of self-assembly of catechol-coated magnetite nanocrystals into microsized matrix-based particles. The resulting biodegradable microprobes (M3P for microsized matrix-based magnetic particles) carry up to 40,000 times higher amounts of superparamagnetic material than classically used nanoparticles while preserving favorable biocompatibility and excellent water dispersibility. After conjugation to monoclonal antibodies, targeted M3P display high sensitivity and specificity to detect inflammation in vivo in the brain, kidneys, and intestinal mucosa. The high payload of superparamagnetic material, excellent toxicity profile, short circulation half-life, and widespread reactivity of the M3P particles provides a promising platform for clinical translation of immuno-MRI.
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Affiliation(s)
- Sara Martinez de Lizarrondo
- Normandie Université, UNICAEN, INSERM, PhIND (Physiopathology and Imaging of Neurological Disorders), Institut Blood and Brain @ Caen-Normandie, Cyceron, 14000 Caen, France
| | - Charlene Jacqmarcq
- Normandie Université, UNICAEN, INSERM, PhIND (Physiopathology and Imaging of Neurological Disorders), Institut Blood and Brain @ Caen-Normandie, Cyceron, 14000 Caen, France
| | - Mikael Naveau
- Normandie Université, UMS 3408 Cyceron, CNRS, University of Caen Normandy, GIP CYCERON, Caen, France
| | - Manuel Navarro-Oviedo
- Normandie Université, UNICAEN, INSERM, PhIND (Physiopathology and Imaging of Neurological Disorders), Institut Blood and Brain @ Caen-Normandie, Cyceron, 14000 Caen, France
| | - Swannie Pedron
- Normandie Université, UNICAEN, INSERM, PhIND (Physiopathology and Imaging of Neurological Disorders), Institut Blood and Brain @ Caen-Normandie, Cyceron, 14000 Caen, France
| | - Alexandre Adam
- Institut de Physique et de Chimie des Matériaux de Strasbourg (IPCMS), UMR-7504 CNRS—Université de Strasbourg, 23 rue du Lœss, 67034 Strasbourg, France
| | - Barbara Freis
- Institut de Physique et de Chimie des Matériaux de Strasbourg (IPCMS), UMR-7504 CNRS—Université de Strasbourg, 23 rue du Lœss, 67034 Strasbourg, France
| | - Stephane Allouche
- CHU Caen, Department of Biochemistry, CHU de Caen Côte de Nacre, Caen, France
| | - Didier Goux
- Centre de Microscopie Appliquée à la Biologie (CMAbio), UniCaen, Normandie University, SF4206 Icore, 14000 Caen, France
| | - Sarah Razafindrakoto
- MSC, Université de Paris CNRS, UMR7057, 45 rue des Saints Pères 75006, Paris, France
| | - Florence Gazeau
- MSC, Université de Paris CNRS, UMR7057, 45 rue des Saints Pères 75006, Paris, France
| | - Damien Mertz
- Institut de Physique et de Chimie des Matériaux de Strasbourg (IPCMS), UMR-7504 CNRS—Université de Strasbourg, 23 rue du Lœss, 67034 Strasbourg, France
| | - Denis Vivien
- Normandie Université, UNICAEN, INSERM, PhIND (Physiopathology and Imaging of Neurological Disorders), Institut Blood and Brain @ Caen-Normandie, Cyceron, 14000 Caen, France
- CHU Caen, Clinical Research Department, CHU de Caen Côte de Nacre, Caen, France
| | - Thomas Bonnard
- Normandie Université, UNICAEN, INSERM, PhIND (Physiopathology and Imaging of Neurological Disorders), Institut Blood and Brain @ Caen-Normandie, Cyceron, 14000 Caen, France
| | - Maxime Gauberti
- Normandie Université, UNICAEN, INSERM, PhIND (Physiopathology and Imaging of Neurological Disorders), Institut Blood and Brain @ Caen-Normandie, Cyceron, 14000 Caen, France
- CHU Caen, Department of Diagnostic Imaging and Interventional Radiology, CHU de Caen Côte de Nacre, Caen, France
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5
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18F Site-Specific Labelling of a Single-Chain Antibody against Activated Platelets for the Detection of Acute Thrombosis in Positron Emission Tomography. Int J Mol Sci 2022; 23:ijms23136886. [PMID: 35805892 PMCID: PMC9267009 DOI: 10.3390/ijms23136886] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 06/12/2022] [Accepted: 06/14/2022] [Indexed: 12/10/2022] Open
Abstract
Positron emission tomography is the imaging modality of choice when it comes to the high sensitivity detection of key markers of thrombosis and inflammation, such as activated platelets. We, previously, generated a fluorine-18 labelled single-chain antibody (scFv) against ligand-induced binding sites (LIBS) on activated platelets, binding it to the highly abundant platelet glycoprotein integrin receptor IIb/IIIa. We used a non-site-specific bio conjugation approach with N-succinimidyl-4-[18F]fluorobenzoate (S[18F]FB), leading to a mixture of products with reduced antigen binding. In the present study, we have developed and characterised a novel fluorine-18 PET radiotracer, based on this antibody, using site-specific bio conjugation to engineer cysteine residues with N-[2-(4-[18F]fluorobenzamido)ethyl]maleimide ([18F]FBEM). ScFvanti-LIBS and control antibody mut-scFv, with engineered C-terminal cysteine, were reduced, and then, they reacted with N-[2-(4-[18F]fluorobenzamido)ethyl]maleimide ([18F]FBEM). Radiolabelled scFv was injected into mice with FeCl3-induced thrombus in the left carotid artery. Clots were imaged in a PET MR imaging system, and the amount of radioactivity in major organs was measured using an ionisation chamber and image analysis. Assessment of vessel injury, as well as the biodistribution of the radiolabelled scFv, was studied. In the in vivo experiments, we found uptake of the targeted tracer in the injured vessel, compared with the non-injured vessel, as well as a high uptake of both tracers in the kidney, lung, and muscle. As expected, both tracers cleared rapidly via the kidney. Surprisingly, a large quantity of both tracers was taken up by organs with a high glutathione content, such as the muscle and lung, due to the instability of the maleimide cysteine bond in vivo, which warrants further investigations. This limits the ability of the novel antibody radiotracer 18F-scFvanti-LIBS to bind to the target in vivo and, therefore, as a useful agent for the sensitive detection of activated platelets. We describe the first fluorine-18 variant of the scFvanti-LIBS against activated platelets using site-specific bio conjugation.
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Schmidt SN, Reichardt W, Kaufmann BA, Wadle C, von Elverfeldt D, Stachon P, Hilgendorf I, Wolf D, Heidt T, Duerschmied D, Peter K, Bode C, von zur Mühlen C, Maier A. P2Y 12 Inhibition in Murine Myocarditis Results in Reduced Platelet Infiltration and Preserved Ejection Fraction. Cells 2021; 10:3414. [PMID: 34943922 PMCID: PMC8699761 DOI: 10.3390/cells10123414] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Revised: 11/27/2021] [Accepted: 11/30/2021] [Indexed: 02/07/2023] Open
Abstract
Previous mouse studies have shown the increased presence of platelets in the myocardium during early stages of myocarditis and their selective detection by MRI. Here, we aimed to depict early myocarditis using molecular contrast-enhanced ultrasound of activated platelets, and to evaluate the impact of a P2Y12 receptor platelet inhibition. Experimental autoimmune myocarditis was induced in BALB/c mice by subcutaneous injection of porcine cardiac myosin and complete Freund adjuvant (CFA). Activated platelets were targeted with microbubbles (MB) coupled to a single-chain antibody that binds to the "ligand-induced binding sites" of the GPIIb/IIIa-receptor (=LIBS-MB). Alongside myocarditis induction, a group of mice received a daily dose of 100 g prasugrel for 1 month. Mice injected with myosin and CFA had a significantly deteriorated ejection fraction and histological inflammation on day 28 compared to mice only injected with myosin. Platelets infiltrated the myocardium before reduction in ejection fraction could be detected by echocardiography. No selective binding of the LIBS-MB contrast agent could be detected by either ultrasound or histology. Prasugrel therapy preserved ejection fraction and significantly reduced platelet aggregates in the myocardium compared to mice without prasugrel therapy. Therefore, P2Y12 inhibition could be a promising early therapeutic target in myocarditis, requiring further investigation.
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Affiliation(s)
- Sarah Nasreen Schmidt
- Heart Center Freiburg University, Department of Cardiology and Angiology I, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (S.N.S.); (C.W.); (P.S.); (I.H.); (D.W.); (T.H.); (D.D.); (C.B.); (C.v.z.M.)
| | - Wilfried Reichardt
- University Medical Center Freiburg, Department of Radiology–Medical Physics, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (W.R.); (D.v.E.)
- German Consortium for Translational Cancer Research (DKTK), 69120 Heidelberg, Germany
- German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
| | - Beat A. Kaufmann
- Department of Cardiology, University Hospital Basel, University of Basel, 4031 Basel, Switzerland;
| | - Carolin Wadle
- Heart Center Freiburg University, Department of Cardiology and Angiology I, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (S.N.S.); (C.W.); (P.S.); (I.H.); (D.W.); (T.H.); (D.D.); (C.B.); (C.v.z.M.)
| | - Dominik von Elverfeldt
- University Medical Center Freiburg, Department of Radiology–Medical Physics, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (W.R.); (D.v.E.)
| | - Peter Stachon
- Heart Center Freiburg University, Department of Cardiology and Angiology I, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (S.N.S.); (C.W.); (P.S.); (I.H.); (D.W.); (T.H.); (D.D.); (C.B.); (C.v.z.M.)
- Medical Center Mannheim, Department of Cardiology, Medical Faculty Mannheim, Haemostaseology and Medical Intensive Care University Heidelberg University, 68167 Mannheim, Germany
| | - Ingo Hilgendorf
- Heart Center Freiburg University, Department of Cardiology and Angiology I, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (S.N.S.); (C.W.); (P.S.); (I.H.); (D.W.); (T.H.); (D.D.); (C.B.); (C.v.z.M.)
| | - Dennis Wolf
- Heart Center Freiburg University, Department of Cardiology and Angiology I, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (S.N.S.); (C.W.); (P.S.); (I.H.); (D.W.); (T.H.); (D.D.); (C.B.); (C.v.z.M.)
| | - Timo Heidt
- Heart Center Freiburg University, Department of Cardiology and Angiology I, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (S.N.S.); (C.W.); (P.S.); (I.H.); (D.W.); (T.H.); (D.D.); (C.B.); (C.v.z.M.)
| | - Daniel Duerschmied
- Heart Center Freiburg University, Department of Cardiology and Angiology I, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (S.N.S.); (C.W.); (P.S.); (I.H.); (D.W.); (T.H.); (D.D.); (C.B.); (C.v.z.M.)
- Medical Center Mannheim, Department of Cardiology, Medical Faculty Mannheim, Haemostaseology and Medical Intensive Care University Heidelberg University, 68167 Mannheim, Germany
| | - Karlheinz Peter
- Baker Heart & Diabetes Institute, Melbourne, VIC 3004, Australia;
| | - Christoph Bode
- Heart Center Freiburg University, Department of Cardiology and Angiology I, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (S.N.S.); (C.W.); (P.S.); (I.H.); (D.W.); (T.H.); (D.D.); (C.B.); (C.v.z.M.)
| | - Constantin von zur Mühlen
- Heart Center Freiburg University, Department of Cardiology and Angiology I, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (S.N.S.); (C.W.); (P.S.); (I.H.); (D.W.); (T.H.); (D.D.); (C.B.); (C.v.z.M.)
| | - Alexander Maier
- Heart Center Freiburg University, Department of Cardiology and Angiology I, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (S.N.S.); (C.W.); (P.S.); (I.H.); (D.W.); (T.H.); (D.D.); (C.B.); (C.v.z.M.)
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7
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Wang X, Ziegler M, McFadyen JD, Peter K. Molecular Imaging of Arterial and Venous Thrombosis. Br J Pharmacol 2021; 178:4246-4269. [PMID: 34296431 DOI: 10.1111/bph.15635] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 08/14/2020] [Accepted: 09/23/2020] [Indexed: 11/30/2022] Open
Abstract
Thrombosis contributes to one in four deaths worldwide and is the cause of a large proportion of mortality and morbidity. A reliable and rapid diagnosis of thrombosis will allow for immediate therapy, thereby providing significant benefits to patients. Molecular imaging is a fast-growing and captivating area of research, in both preclinical and clinical applications. Major advances have been achieved by improvements in three central areas of molecular imaging: 1) Better markers for diseases, with increased sensitivity and selectivity; 2) Optimised contrast agents with improved signal to noise ratio; 3) Progress in scanner technologies with higher sensitivity and resolution. Clinically available imaging modalities used for molecular imaging include, magnetic resonance imaging (MRI), X-ray computed tomography (CT), ultrasound, as well as nuclear imaging, such as positron emission tomography (PET) and single photon emission computed tomography (SPECT). In the preclinical imaging field, optical (fluorescence and bioluminescent) molecular imaging has provided new mechanistic insights in the pathology of thromboembolic diseases. Overall, the advances in molecular imaging, driven by the collaboration of various scientific disciplines, have substantially contributed to an improved understanding of thrombotic disease, and raises the exciting prospect of earlier diagnosis and individualised therapy for cardiovascular diseases. As such, these advances hold significant promise to be translated to clinical practice and ultimately to reduce mortality and morbidity in patients with thromboembolic diseases.
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Affiliation(s)
- Xiaowei Wang
- Molecular Imaging and Theranostics Laboratory.,Atherothrombosis and Vascular Biology Laboratory, Baker Heart and Diabetes Institute.,Department of Medicine, Monash University.,Department of Cardiometabolic Health, University of Melbourne
| | - Melanie Ziegler
- Atherothrombosis and Vascular Biology Laboratory, Baker Heart and Diabetes Institute
| | - James D McFadyen
- Atherothrombosis and Vascular Biology Laboratory, Baker Heart and Diabetes Institute.,Department of Cardiometabolic Health, University of Melbourne.,Clinical Hematology Department, Alfred Hospital
| | - Karlheinz Peter
- Atherothrombosis and Vascular Biology Laboratory, Baker Heart and Diabetes Institute.,Department of Medicine, Monash University.,Department of Cardiometabolic Health, University of Melbourne.,Department of Cardiology, Alfred Hospital, Melbourne, Australia
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8
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Alkarithi G, Duval C, Shi Y, Macrae FL, Ariëns RAS. Thrombus Structural Composition in Cardiovascular Disease. Arterioscler Thromb Vasc Biol 2021; 41:2370-2383. [PMID: 34261330 PMCID: PMC8384252 DOI: 10.1161/atvbaha.120.315754] [Citation(s) in RCA: 67] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Thrombosis is a major complication of cardiovascular disease, leading to myocardial infarction, acute ischemic stroke, or venous thromboembolism. Thrombosis occurs when a thrombus forms inside blood vessels disrupting blood flow. Developments in thrombectomy to remove thrombi from vessels have provided new opportunities to study thrombus composition which may help to understand mechanisms of disease and underpin improvements in treatments. We aimed to review thrombus compositions, roles of components in thrombus formation and stability, and methods to investigate thrombi. Also, we summarize studies on thrombus structure obtained from cardiovascular patients and animal models. Thrombi are composed of fibrin, red blood cells, platelets, leukocytes, and neutrophil extracellular traps. These components have been analyzed by several techniques, including scanning electron microscopy, laser scanning confocal microscopy, histochemistry, and immunohistochemistry; however, each technique has advantages and limitations. Thrombi are heterogenous in composition, but overall, thrombi obtained from myocardial infarction are composed of mainly fibrin and other components, including platelets, red blood cells, leukocytes, and cholesterol crystals. Thrombi from patients with acute ischemic stroke are characterized by red blood cell- and platelet-rich regions. Thrombi from patients with venous thromboembolism contain mainly red blood cells and fibrin with some platelets and leukocytes. Thrombus composition from patients with myocardial infarction is influenced by ischemic time. Animal thrombosis models are crucial to gain further mechanistic information about thrombosis and thrombus structure, with thrombi being similar in composition compared with those from patients. Further studies on thrombus composition and function are key to improve treatment and clinical outcome of thrombosis.
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Affiliation(s)
- Ghadir Alkarithi
- Discovery and Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (G.A., C.D., Y.S., F.L.M., R.A.S.A.).,Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia (G.A.)
| | - Cédric Duval
- Discovery and Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (G.A., C.D., Y.S., F.L.M., R.A.S.A.)
| | - Yu Shi
- Discovery and Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (G.A., C.D., Y.S., F.L.M., R.A.S.A.)
| | - Fraser L Macrae
- Discovery and Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (G.A., C.D., Y.S., F.L.M., R.A.S.A.)
| | - Robert A S Ariëns
- Discovery and Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (G.A., C.D., Y.S., F.L.M., R.A.S.A.)
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9
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Orian JM, D'Souza CS, Kocovski P, Krippner G, Hale MW, Wang X, Peter K. Platelets in Multiple Sclerosis: Early and Central Mediators of Inflammation and Neurodegeneration and Attractive Targets for Molecular Imaging and Site-Directed Therapy. Front Immunol 2021; 12:620963. [PMID: 33679764 PMCID: PMC7933211 DOI: 10.3389/fimmu.2021.620963] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Accepted: 01/27/2021] [Indexed: 12/20/2022] Open
Abstract
Platelets are clearly central to thrombosis and hemostasis. In addition, more recently, evidence has emerged for non-hemostatic roles of platelets including inflammatory and immune reactions/responses. Platelets express immunologically relevant ligands and receptors, demonstrate adhesive interactions with endothelial cells, monocytes and neutrophils, and toll-like receptor (TLR) mediated responses. These properties make platelets central to innate and adaptive immunity and potential candidate key mediators of autoimmune disorders. Multiple sclerosis (MS) is the most common chronic autoimmune central nervous system (CNS) disease. An association between platelets and MS was first indicated by the increased adhesion of platelets to endothelial cells. This was followed by reports identifying structural and functional changes of platelets, their chronic activation in the peripheral blood of MS patients, platelet presence in MS lesions and the more recent revelation that these structural and functional abnormalities are associated with all MS forms and stages. Investigations based on the murine experimental autoimmune encephalomyelitis (EAE) MS model first revealed a contribution to EAE pathogenesis by exacerbation of CNS inflammation and an early role for platelets in EAE development via platelet-neuron and platelet-astrocyte associations, through sialated gangliosides in lipid rafts. Our own studies refined and extended these findings by identifying the critical timing of platelet accumulation in pre-clinical EAE and establishing an initiating and central rather than merely exacerbating role for platelets in disease development. Furthermore, we demonstrated platelet-neuron associations in EAE, coincident with behavioral changes, but preceding the earliest detectable autoreactive T cell accumulation. In combination, these findings establish a new paradigm by asserting that platelets play a neurodegenerative as well as a neuroinflammatory role in MS and therefore, that these two pathological processes are causally linked. This review will discuss the implications of these findings for our understanding of MS, for future applications for imaging toward early detection of MS, and for novel strategies for platelet-targeted treatment of MS.
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Affiliation(s)
- Jacqueline M Orian
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC, Australia
| | - Claretta S D'Souza
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC, Australia
| | - Pece Kocovski
- Department of Psychology and Counselling, School of Psychology and Public Health, College of Science, Health and Engineering, La Trobe University, Melbourne, VIC, Australia
| | - Guy Krippner
- Medicinal Chemistry, Baker Heart and Diabetes Institute, Melbourne, VIC, Australia
| | - Matthew W Hale
- Department of Psychology and Counselling, School of Psychology and Public Health, College of Science, Health and Engineering, La Trobe University, Melbourne, VIC, Australia
| | - Xiaowei Wang
- Atherothrombosis and Vascular Biology Laboratory, Baker Heart and Diabetes Institute, Melbourne, VIC, Australia.,Department of Cardiometabolic Health, University of Melbourne, Melbourne, VIC, Australia.,Molecular Imaging and Theranostics Laboratory, Baker Heart and Diabetes Institute, Melbourne, VIC, Australia.,Department of Physiology, Anatomy and Microbiology, School of Life Science, La Trobe University, Melbourne, VIC, Australia
| | - Karlheinz Peter
- Atherothrombosis and Vascular Biology Laboratory, Baker Heart and Diabetes Institute, Melbourne, VIC, Australia.,Department of Cardiometabolic Health, University of Melbourne, Melbourne, VIC, Australia.,Department of Physiology, Anatomy and Microbiology, School of Life Science, La Trobe University, Melbourne, VIC, Australia
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10
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Ye S, Liu Y, Lu Y, Ji Y, Mei L, Yang M, Gong X, Gu Q, Li D, Yang F, Li CJ. Cyclic RGD functionalized liposomes targeted to activated platelets for thrombosis dual-mode magnetic resonance imaging. J Mater Chem B 2021; 8:447-453. [PMID: 31833530 DOI: 10.1039/c9tb01834d] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Thrombotic disease is a serious threat to human health. The rapid and accurate detection of thrombosis is still a clinical challenge. To achieve the accurate diagnosis of thrombosis with magnetic resonance imaging (MRI), nanomaterials-based contrast agents have been developed in recent years. In this study, cyclic RGD functionalized liposomes targeted to the activated platelets are developed for thrombosis dual-mode MRI. The cyclic RGD functionalized liposomes (cRGD@MLP-Gd) encapsulated with gadolinium diethylenetriamine penta-acetic acid (Gd-DTPA) and superparamagnetic iron oxide (SPIO) are prepared, and their thrombus-targeted T1 and T2 MRI potential is evaluated in vitro and in vivo. Results show that cRGD@MLP-Gd could actively bind to the activated platelets and gradually accumulate at the thrombus site with a T1 - T2 contrast enhancement imaging effect in vitro. In in vivo MRI experiments, cRGD@MLP-Gd exhibits a T2 contrast enhancement at 1 h after intravenous administration, followed by a visibly larger T1 contrast enhancement at the thrombus site. This dynamic property showed that cRGD@MLP-Gd could actively bind to thrombus and possessed an enhanced T1 and T2 dual-mode MRI effect in vivo. Our results establish the characterization, feasibility and superiority of cRGD@MLP-Gd for the rapid identification of thrombosis, showing great potential to improve diagnostic accuracy and sensitivity to thrombosis of the MRI technique.
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Affiliation(s)
- Sen Ye
- Department of Cardiology, First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China.
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11
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Osborn EA, Albaghdadi M, Libby P, Jaffer FA. Molecular Imaging of Atherosclerosis. Mol Imaging 2021. [DOI: 10.1016/b978-0-12-816386-3.00086-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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12
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Ezeani M, Hagemeyer CE, Lal S, Niego B. Molecular imaging of atrial myopathy: Towards early AF detection and non-invasive disease management. Trends Cardiovasc Med 2020; 32:20-31. [DOI: 10.1016/j.tcm.2020.12.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 12/07/2020] [Accepted: 12/07/2020] [Indexed: 12/14/2022]
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13
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Maier A, Braig M, Jakob K, Bienert T, Schäper M, Merkle A, Wadle C, Menza M, Neudorfer I, Bojti I, Stachon P, Duerschmied D, Hilgendorf I, Heidt T, Bode C, Peter K, Klingel K, von Elverfeldt D, von Zur Mühlen C. Molecular magnetic resonance imaging of activated platelets allows noninvasive detection of early myocarditis in mice. Sci Rep 2020; 10:13211. [PMID: 32764735 PMCID: PMC7413393 DOI: 10.1038/s41598-020-70043-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 07/22/2020] [Indexed: 11/09/2022] Open
Abstract
MRI sensitivity for diagnosis and localization of early myocarditis is limited, although it is of central clinical interest. The aim of this project was to test a contrast agent targeting activated platelets consisting of microparticles of iron oxide (MPIO) conjugated to a single-chain antibody directed against ligand-induced binding sites (LIBS) of activated glycoprotein IIb/IIIa (= LIBS-MPIO). Myocarditis was induced by subcutaneous injection of an emulsion of porcine cardiac myosin and complete Freund’s adjuvant in mice. 3D 7 T in-vivo MRI showed focal signal effects in LIBS-MPIO injected mice 2 days after induction of myocarditis, whereas in control-MPIO injected mice no signal was detectable. Histology confirmed CD41-positive staining, indicating platelet involvement in myocarditis in mice as well as in human specimens with significantly higher LIBS-MPIO binding compared to control-MPIO in both species. Quantification of the myocardial MRI signal confirmed a signal decrease after LIBS-MPIO injection and significant less signal in comparison to control-MPIO injection. These data show, that platelets are involved in inflammation during the course of myocarditis in mice and humans. They can be imaged non-invasively with LIBS-MPIO by molecular MRI at an early time point of the inflammation in mice, which is a valuable approach for preclinical models and of interest for both diagnostic and prognostic purposes.
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Affiliation(s)
- Alexander Maier
- Department of Cardiology and Angiology I, Heart Center Freiburg University, Faculty of Medicine, University of Freiburg, Hugstetter Strasse 55, 79106, Freiburg, Germany.
| | - Moritz Braig
- Department of Radiology, Medical Physics, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Katharina Jakob
- Department of Cardiology and Angiology I, Heart Center Freiburg University, Faculty of Medicine, University of Freiburg, Hugstetter Strasse 55, 79106, Freiburg, Germany
| | - Thomas Bienert
- Department of Radiology, Medical Physics, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Michaela Schäper
- Department of Radiology, Medical Physics, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Annette Merkle
- Department of Radiology, Medical Physics, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Carolin Wadle
- Department of Cardiology and Angiology I, Heart Center Freiburg University, Faculty of Medicine, University of Freiburg, Hugstetter Strasse 55, 79106, Freiburg, Germany
| | - Marius Menza
- Department of Radiology, Medical Physics, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Irene Neudorfer
- Department of Cardiology and Angiology I, Heart Center Freiburg University, Faculty of Medicine, University of Freiburg, Hugstetter Strasse 55, 79106, Freiburg, Germany
| | - István Bojti
- Department of Cardiology and Angiology I, Heart Center Freiburg University, Faculty of Medicine, University of Freiburg, Hugstetter Strasse 55, 79106, Freiburg, Germany
| | - Peter Stachon
- Department of Cardiology and Angiology I, Heart Center Freiburg University, Faculty of Medicine, University of Freiburg, Hugstetter Strasse 55, 79106, Freiburg, Germany
| | - Daniel Duerschmied
- Department of Cardiology and Angiology I, Heart Center Freiburg University, Faculty of Medicine, University of Freiburg, Hugstetter Strasse 55, 79106, Freiburg, Germany
| | - Ingo Hilgendorf
- Department of Cardiology and Angiology I, Heart Center Freiburg University, Faculty of Medicine, University of Freiburg, Hugstetter Strasse 55, 79106, Freiburg, Germany
| | - Timo Heidt
- Department of Cardiology and Angiology I, Heart Center Freiburg University, Faculty of Medicine, University of Freiburg, Hugstetter Strasse 55, 79106, Freiburg, Germany
| | - Christoph Bode
- Department of Cardiology and Angiology I, Heart Center Freiburg University, Faculty of Medicine, University of Freiburg, Hugstetter Strasse 55, 79106, Freiburg, Germany
| | | | - Karin Klingel
- Cardiopathology, Institute for Pathology and Neuropathology, University Hospital Tuebingen, Tuebingen, Germany
| | - Dominik von Elverfeldt
- Department of Radiology, Medical Physics, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Constantin von Zur Mühlen
- Department of Cardiology and Angiology I, Heart Center Freiburg University, Faculty of Medicine, University of Freiburg, Hugstetter Strasse 55, 79106, Freiburg, Germany
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14
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Heidt T, Reiss S, Lottner T, Özen AC, Bode C, Bock M, von Zur Mühlen C. Magnetic resonance imaging for pathobiological assessment and interventional treatment of the coronary arteries. Eur Heart J Suppl 2020; 22:C46-C56. [PMID: 32368198 PMCID: PMC7189741 DOI: 10.1093/eurheartj/suaa009] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
X-ray-based fluoroscopy is the standard tool for diagnostics and intervention in coronary artery disease. In recent years, computed tomography has emerged as a non-invasive alternative to coronary angiography offering detection of coronary calcification and imaging of the vessel lumen by the use of iodinated contrast agents. Even though currently available invasive or non-invasive techniques can show the degree of vessel stenosis, they are unable to provide information about biofunctional plaque properties, e.g. plaque inflammation. Furthermore, the use of radiation and the necessity of iodinated contrast agents remain unfavourable prerequisites. Magnetic resonance imaging (MRI) is a radiation-free alternative to X-ray which offers anatomical and functional imaging contrasts fostering the idea of non-invasive biofunctional assessment of the coronary vessel wall. In combination with molecular contrast agents that target-specific epitopes of the vessel wall, MRI might reveal unique plaque properties rendering it, for example, ‘vulnerable and prone to rupture’. Early detection of these lesions may allow for early or prophylactic treatment even before an adverse coronary event occurs. Besides diagnostic imaging, advances in real-time image acquisition and motion compensation now provide grounds for MRI-guided coronary interventions. In this article, we summarize our research on MRI-based molecular imaging in cardiovascular disease and feature our advances towards real-time MRI-based coronary interventions in a porcine model.
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Affiliation(s)
- Timo Heidt
- Department of Cardiology, Cardiology and Angiology I, Heart Center Freiburg University and Faculty of Medicine, Hugstetterstr. 55, 79106 Freiburg, Germany
| | - Simon Reiss
- Department of Radiology, Medical Physics, Medical Center University of Freiburg, Faculty of Medicine, University of Freiburg, Hugstetter Str. 55, 79106 Freiburg, Germany
| | - Thomas Lottner
- Department of Radiology, Medical Physics, Medical Center University of Freiburg, Faculty of Medicine, University of Freiburg, Hugstetter Str. 55, 79106 Freiburg, Germany
| | - Ali C Özen
- Department of Radiology, Medical Physics, Medical Center University of Freiburg, Faculty of Medicine, University of Freiburg, Hugstetter Str. 55, 79106 Freiburg, Germany.,German Cancer Consortium Partner Site Freiburg, German Cancer Research Center (DKFZ), Stefan-Meier-Str. 17, 79104 Freiburg, Germany
| | - Christoph Bode
- Department of Cardiology, Cardiology and Angiology I, Heart Center Freiburg University and Faculty of Medicine, Hugstetterstr. 55, 79106 Freiburg, Germany
| | - Michael Bock
- Department of Radiology, Medical Physics, Medical Center University of Freiburg, Faculty of Medicine, University of Freiburg, Hugstetter Str. 55, 79106 Freiburg, Germany
| | - Constantin von Zur Mühlen
- Department of Cardiology, Cardiology and Angiology I, Heart Center Freiburg University and Faculty of Medicine, Hugstetterstr. 55, 79106 Freiburg, Germany
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15
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Qiao R, Huang X, Qin Y, Li Y, Davis TP, Hagemeyer CE, Gao M. Recent advances in molecular imaging of atherosclerotic plaques and thrombosis. NANOSCALE 2020; 12:8040-8064. [PMID: 32239038 DOI: 10.1039/d0nr00599a] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
As the complications of atherosclerosis such as myocardial infarction and stroke are still one of the leading causes of mortality worldwide, the development of new diagnostic tools for the early detection of plaque instability and thrombosis is urgently needed. Advanced molecular imaging probes based on functional nanomaterials in combination with cutting edge imaging techniques are now paving the way for novel and unique approaches to monitor the inflammatory progress in atherosclerosis. This review focuses on the development of various molecular probes for the diagnosis of plaques and thrombosis in atherosclerosis, along with perspectives of their diagnostic applications in cardiovascular diseases. Specifically, we summarize the biological targets that can be used for atherosclerosis and thrombosis imaging. Then we describe the emerging molecular imaging techniques based on the utilization of engineered nanoprobes together with their challenges in clinical translation.
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Affiliation(s)
- Ruirui Qiao
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X), Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, China
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16
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Wang Y, Zhan X, Luo W, Zhao L, Yang S, Chen D, Li Z, Wang L. GSK3β inhibition suppresses the hepatic lipid accumulation in Schizothorax prenanti. FISH PHYSIOLOGY AND BIOCHEMISTRY 2019; 45:1953-1961. [PMID: 31401708 DOI: 10.1007/s10695-019-00691-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Accepted: 07/29/2019] [Indexed: 06/10/2023]
Abstract
Glycogen synthase kinase-3β (GSK3β) is a serine/threonine kinase involved in the regulation of embryonic development, glycogen metabolism, protein synthesis, mitosis, and apoptosis. To understand the role of GSK3β in hepatic lipid accumulation of Schizothorax prenanti, we used lithium chloride (LiCl), a GSK3β inhibitor, to inhibit the expression and activity of GSK3β. LiCl increased levels of phosphorylation of GSK3β (Ser9) and decreased the protein level of GSK3β. Plasma TG, TC, and LDL-C levels were greatly decreased after LiCl treatment. Additionally, GSK3β inhibition significantly reduced the levels of hepatic triglyceride (TG) and decreased the expression of lipogenesis-related genes in liver. Interestingly, LiCl decreased levels of phosphorylation of STAT3 (Tyr705), and then inhibited the activity of STAT3. These results indicate that in vivo LiCl treatment, which inhibited GSK3β activity, effectively decreased hepatic lipid accumulation through STAT3 in Schizothorax prenanti.
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Affiliation(s)
- Yan Wang
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan, People's Republic of China
| | | | - Wei Luo
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan, People's Republic of China
| | - Liulan Zhao
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan, People's Republic of China
| | - Song Yang
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan, People's Republic of China
| | - Defang Chen
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan, People's Republic of China
| | - Zhiqiong Li
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan, People's Republic of China
| | - Linjie Wang
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan, People's Republic of China.
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17
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Gawaz M, Borst O. Targeted antiplatelet therapy: novel treatment options for ischaemic heart disease. Eur Heart J 2019; 39:117-118. [PMID: 29029141 DOI: 10.1093/eurheartj/ehx559] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Meinrad Gawaz
- Department of Cardiology and Cardiovascular Medicine, University Hospital Tübingen, Otfried-Mueller-Strasse 10, 72076 Tübingen, Germany
| | - Oliver Borst
- Department of Cardiology and Cardiovascular Medicine, University Hospital Tübingen, Otfried-Mueller-Strasse 10, 72076 Tübingen, Germany
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18
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Palasubramaniam J, Wang X, Peter K. Myocardial Infarction-From Atherosclerosis to Thrombosis. Arterioscler Thromb Vasc Biol 2019; 39:e176-e185. [PMID: 31339782 DOI: 10.1161/atvbaha.119.312578] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Jathushan Palasubramaniam
- From the Atherothrombosis and Vascular Biology Laboratory, Baker Heart and Diabetes Institute, Melbourne, Australia (J.P., X.W., K.P.).,Department of Medicine, Monash University, Melbourne, Australia (J.P., X.W., K.P.).,Department of Cardiology, Alfred Hospital, Melbourne, Australia (J.P., K.P.)
| | - Xiaowei Wang
- From the Atherothrombosis and Vascular Biology Laboratory, Baker Heart and Diabetes Institute, Melbourne, Australia (J.P., X.W., K.P.).,Department of Medicine, Monash University, Melbourne, Australia (J.P., X.W., K.P.)
| | - Karlheinz Peter
- From the Atherothrombosis and Vascular Biology Laboratory, Baker Heart and Diabetes Institute, Melbourne, Australia (J.P., X.W., K.P.).,Department of Medicine, Monash University, Melbourne, Australia (J.P., X.W., K.P.).,Department of Cardiology, Alfred Hospital, Melbourne, Australia (J.P., K.P.)
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19
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van Moorsel MV, Urbanus RT, Verhoef S, Koekman C, Vink M, Vermonden T, Maas C, Pasterkamp G, Schiffelers RM. A head-to-head comparison of conjugation methods for VHHs: Random maleimide-thiol coupling versus controlled click chemistry. INTERNATIONAL JOURNAL OF PHARMACEUTICS-X 2019; 1:100020. [PMID: 31517285 PMCID: PMC6733300 DOI: 10.1016/j.ijpx.2019.100020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 06/13/2019] [Accepted: 06/14/2019] [Indexed: 12/17/2022]
Abstract
Targeted delivery of therapeutics is an attractive strategy for vascular diseases. Recently, variable domains of heavy-chain-only antibodies (VHHs) have gained momentum as targeting ligands to achieve this. Targeting ligands need adequate conjugation to the preferred delivery platform. When choosing a conjugation method, two features are critical: a fixed and specified stoichiometry and an orientation of the conjugated targeting ligand that preserves its functional binding capacity. We here describe a comparison of popular maleimide-thiol conjugation with state-of-the-art “click chemistry” for conjugating VHHs. First, we demonstrate the modification of VHHs with azide via Sortase A mediated transpeptidation. Subsequently, optimal clicking conditions were found at a temperature of 50 °C, using a 3:1 M ratio of DBCO-PEG:VHH-azide and an incubation time of 18 h. Second, we show that stoichiometry was controllable with click chemistry and produced defined conjugates, whereas maleimide-thiol conjugation resulted in diverse reaction products. In addition, we show that all VHHs – independent of the conjugation method or conjugated residue – still specifically bind their cognate antigen. Yet, VHH’s functional binding capacities after click chemistry were at least equal or better than maleimide thiol conjugates. Together these data underline that click chemistry is superior to maleimide-thiol conjugation for conjugating targeting ligands.
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Affiliation(s)
- Marc V.A. van Moorsel
- Department of Clinical Chemistry and Hematology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Rolf T. Urbanus
- Department of Clinical Chemistry and Hematology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
- Van Creveldkliniek, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
- Van Creveld Laboratory for Thrombosis and Haemostasis, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - S. Verhoef
- Department of Clinical Chemistry and Hematology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - C.A. Koekman
- Department of Clinical Chemistry and Hematology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Maurice Vink
- Department of Clinical Chemistry and Hematology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - T. Vermonden
- Department of Pharmaceutical Sciences, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, Utrecht, The Netherlands
| | - Coen Maas
- Department of Clinical Chemistry and Hematology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Gerard Pasterkamp
- Department of Clinical Chemistry and Hematology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Raymond M. Schiffelers
- Department of Clinical Chemistry and Hematology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
- Corresponding author at: Dept. of Clinical Chemistry and Haematology, University Medical Center Utrecht, Heidelberglaan 100, room G03.550, 3584CX Utrecht, The Netherlands.
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20
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Lanza GM, Cui G, Schmieder AH, Zhang H, Allen JS, Scott MJ, Williams T, Yang X. An unmet clinical need: The history of thrombus imaging. J Nucl Cardiol 2019; 26:986-997. [PMID: 28608182 PMCID: PMC5741521 DOI: 10.1007/s12350-017-0942-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Revised: 05/24/2017] [Indexed: 11/24/2022]
Abstract
Robust thrombus imaging is an unresolved clinical unmet need dating back to the mid 1970s. While early molecular imaging approaches began with nuclear SPECT imaging, contrast agents for virtually all biomedical imaging modalities have been demonstrated in vivo with unique strengths and common weaknesses. Two primary molecular imaging targets have been pursued for thrombus imaging: platelets and fibrin. Some common issues noted over 40 years ago persist today. Acute thrombus is readily imaged with all probes and modalities, but aged thrombus remains a challenge. Similarly, anti-coagulation continues to interfere with and often negate thrombus imaging efficacy, but heparin is clinically required in patients suspected of pulmonary embolism, deep venous thrombosis or coronary ruptured plaque prior to confirmatory diagnostic studies have been executed and interpreted. These fundamental issues can be overcome, but an innovative departure from the prior approaches will be needed.
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Affiliation(s)
- Gregory M Lanza
- Department of Medicine, Division of Cardiology, Washington University Medical School, St. Louis, MO, 63108, USA.
| | - Grace Cui
- Department of Medicine, Division of Cardiology, Washington University Medical School, St. Louis, MO, 63108, USA
| | - Anne H Schmieder
- Department of Medicine, Division of Cardiology, Washington University Medical School, St. Louis, MO, 63108, USA
| | - Huiying Zhang
- Department of Medicine, Division of Cardiology, Washington University Medical School, St. Louis, MO, 63108, USA
| | - John S Allen
- Department of Medicine, Division of Cardiology, Washington University Medical School, St. Louis, MO, 63108, USA
| | - Michael J Scott
- Department of Medicine, Division of Cardiology, Washington University Medical School, St. Louis, MO, 63108, USA
| | - Todd Williams
- Department of Medicine, Division of Cardiology, Washington University Medical School, St. Louis, MO, 63108, USA
| | - Xiaoxia Yang
- Department of Medicine, Division of Cardiology, Washington University Medical School, St. Louis, MO, 63108, USA
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21
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Huang T, Li N, Gao J. Recent strategies on targeted delivery of thrombolytics. Asian J Pharm Sci 2019; 14:233-247. [PMID: 32104455 PMCID: PMC7032080 DOI: 10.1016/j.ajps.2018.12.004] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Revised: 12/12/2018] [Accepted: 12/26/2018] [Indexed: 12/18/2022] Open
Abstract
Thrombus formed in blood vessel is a progressive process, which would lead to life-threatening thrombotic diseases such as ischemic stroke. Unlike other diseases, the recognition of thrombus is usually in the late stage where blood vessels are largely blocked. So acute thrombotic diseases have a narrow therapeutic window, and remain leading causes of morbidity and mortality, whereas current thrombolysis therapy has limited therapeutic effects and bleeding complications. Thrombolytic agents in unwanted sites would cause hemorrhage due to the activation of plasminogen. Moreover, untargeted thrombolysis therapy require large amounts of thrombolytic agents, which in return would enhance hemorrhage risk. To improve the efficiency while minimizing the adverse effects of traditional thrombolysis therapy, novel drug delivery systems have been investigated. Various targeting strategies including ultrasound and magnetic field directed targeting, and specific binding, have been designed to deliver thrombolytic drugs to the thrombotic sites. These strategies demonstrate promising results in reducing bleeding risk as well as allowing less dosage of thrombolytic drugs with lowered clot lysis time. In this review, we discuss recent progress on targeted delivery of thrombolytics, and summarize treatment advantages and shortcomings, potentially helping to further promote the development of targeted thrombolysis.
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Affiliation(s)
- Ting Huang
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Ni Li
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China.,Department of Cardiothoracic Surgery, Ningbo Medical Centre Lihuili Hospital, Ningbo University, Ningbo 315041, China
| | - Jianqing Gao
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
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Chen YC, Huang AL, Kyaw TS, Bobik A, Peter K. Atherosclerotic Plaque Rupture: Identifying the Straw That Breaks the Camel's Back. Arterioscler Thromb Vasc Biol 2018; 36:e63-72. [PMID: 27466619 DOI: 10.1161/atvbaha.116.307993] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Accepted: 06/24/2016] [Indexed: 01/19/2023]
Affiliation(s)
- Yung-Chih Chen
- From the Atherothrombosis and Vascular Biology Laboratory (Y.-C.C., A.L.H., K.P.), and Vascular Biology and Atherosclerosis Laboratory (T.S.K., A.B.), Baker IDI Heart & Diabetes Institute, Melbourne, Victoria, Australia; and Departments of Medicine and Immunology, Monash University, Melbourne, Victoria, Australia (A.L.H., A.B., K.P.)
| | - Alex L Huang
- From the Atherothrombosis and Vascular Biology Laboratory (Y.-C.C., A.L.H., K.P.), and Vascular Biology and Atherosclerosis Laboratory (T.S.K., A.B.), Baker IDI Heart & Diabetes Institute, Melbourne, Victoria, Australia; and Departments of Medicine and Immunology, Monash University, Melbourne, Victoria, Australia (A.L.H., A.B., K.P.)
| | - Tin S Kyaw
- From the Atherothrombosis and Vascular Biology Laboratory (Y.-C.C., A.L.H., K.P.), and Vascular Biology and Atherosclerosis Laboratory (T.S.K., A.B.), Baker IDI Heart & Diabetes Institute, Melbourne, Victoria, Australia; and Departments of Medicine and Immunology, Monash University, Melbourne, Victoria, Australia (A.L.H., A.B., K.P.)
| | - Alex Bobik
- From the Atherothrombosis and Vascular Biology Laboratory (Y.-C.C., A.L.H., K.P.), and Vascular Biology and Atherosclerosis Laboratory (T.S.K., A.B.), Baker IDI Heart & Diabetes Institute, Melbourne, Victoria, Australia; and Departments of Medicine and Immunology, Monash University, Melbourne, Victoria, Australia (A.L.H., A.B., K.P.)
| | - Karlheinz Peter
- From the Atherothrombosis and Vascular Biology Laboratory (Y.-C.C., A.L.H., K.P.), and Vascular Biology and Atherosclerosis Laboratory (T.S.K., A.B.), Baker IDI Heart & Diabetes Institute, Melbourne, Victoria, Australia; and Departments of Medicine and Immunology, Monash University, Melbourne, Victoria, Australia (A.L.H., A.B., K.P.).
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Levy BE, Hossain MM, Sierchio JM, Thapa D, Gallippi CM, Oldenburg AL. Effect of Model Thrombus Volume and Elastic Modulus on Magnetomotive Ultrasound Signal Under Pulsatile Flow. IEEE TRANSACTIONS ON ULTRASONICS, FERROELECTRICS, AND FREQUENCY CONTROL 2018; 65:1380-1388. [PMID: 29993541 PMCID: PMC6190700 DOI: 10.1109/tuffc.2018.2841774] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Direct ultrasonic imaging of arterial and venous thrombi could aid in diagnosis and treatment planning by providing rapid and cost-effective measurements of thrombus volume and elastic modulus. Toward this end, it was demonstrated that open-air magnetomotive ultrasound (MMUS) provides specific contrast to superparamagnetic iron oxide-labeled model thrombi embedded in gelatin-based blood vessel-mimicking flow phantoms. MMUS was performed on model thrombi in the presence of pulsatile flow that mimics cardiac-induced motion found in real vasculature. The MMUS signal and contrast-to-noise ratio (CNR) were measured across a range of physiologically relevant thrombus volumes and elastic moduli. Model thrombus volumes as small as 0.5 ml were shown to be detectable (CNR > 1) over the entire range of elastic moduli tested (3.5-40 kPa). It was also found that MMUS signal and CNR are increased with increasing thrombus volume ( ) and decreasing elastic modulus ( ), while variations in pulsatile flow rate had little effect. These findings demonstrate that MMUS has promise as a direct in vivo thrombosis imaging modality for quantifying thrombus volume and stiffness.
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Bode C, von zur Mühlen C. MRI, the technology for imaging of thrombi and inflammation. Hamostaseologie 2017; 35:252-62. [DOI: 10.5482/hamo-14-11-0061] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2014] [Accepted: 01/13/2015] [Indexed: 11/05/2022] Open
Abstract
SummaryAtherosclerosis and its sequelae have a major impact on morbidity and mortality. The rupture of an inflamed atherosclerotic plaque is a crucial event, since it can result in acute thrombotic closure of an arterial vessel, resulting e. g. in myocardial infarction or stroke. Not only detection of early plaque rupture with imminent closure is therefore of clinical interest, but also timely detection of vascular inflammation and atherosclerotic plaque progression. However, plaque inflammation or even plaque rupture without vessel occlusion is not reliably detectable by current imaging techniques. Coronary angiography is the gold standard for evaluation of the coronary vessels, but only allows visualization of the vessel lumen without characterizing the important pathophysiology of the vessel wall. Therefore, highly inflamed and rupture prone plaques can be missed, or appear as a minor vessel narrowing. Although currently available techniques such as intravascular ultrasound or optical coherence tomography allow a further characterization of atherosclerotic plaques, it would be desirable to detect plaque inflammation, early plaque rupture or vascular thrombosis by non-invasive techniques such as magnetic resonance imaging (MRI), since they could allow early identification of patients at risk or triage of symptomatic patients.In this manuscript, different strategies for detection of vascular inflammation, plaque-rupture and thrombosis by MRI will be discussed, with a special focus on molecular imaging contrast agents.
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Maier A, Plaza-Heck P, Meixner F, Guenther F, Kaufmann BA, Kramer M, Heidt T, Zirlik A, Hilgendorf I, Reinöhl J, Stachon P, Bronsert P, Birkemeyer R, Neudorfer I, Peter K, Bode C, von zur Mühlen C. A molecular intravascular ultrasound contrast agent allows detection of activated platelets on the surface of symptomatic human plaques. Atherosclerosis 2017; 267:68-77. [DOI: 10.1016/j.atherosclerosis.2017.10.029] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Revised: 10/19/2017] [Accepted: 10/20/2017] [Indexed: 12/21/2022]
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Günther F, Heidt T, Kramer M, Khanicheh E, Klibanov AL, Geibel-Zehender A, Ferrante EA, Hilgendorf I, Wolf D, Zirlik A, Reinöhl J, Bode C, Peter K, Kaufmann BA, Mühlen CVZ. Dual targeting improves capture of ultrasound microbubbles towards activated platelets but yields no additional benefit for imaging of arterial thrombosis. Sci Rep 2017; 7:14898. [PMID: 29097799 PMCID: PMC5668440 DOI: 10.1038/s41598-017-15080-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Accepted: 10/20/2017] [Indexed: 01/13/2023] Open
Abstract
Platelets can be found on the surface of inflamed and ruptured atherosclerotic plaques. Thus, targeting of activated platelets may allow for molecular imaging of vulnerable atherosclerotic lesions. We here investigated microbubbles (MB) functionalized with the selectin ligand sialyl Lewisa individually (MBsLea) or dually with sLea and an antibody targeting ligand-induced binding sites of the activated GPIIb/IIIa receptor (MBDual). Assessed by in vitro flow chamber, targeted MB exhibited increased adhesion to platelets as compared to MBControl. While MBsLea rolled slowly on the platelets’ surface, MBDual enhanced the percentage of firm adhesion. In vivo, MB were investigated by ultrasound in a model of ferric chloride induced non-occlusive carotid artery thrombosis. MBsLea and MBDual revealed a higher ultrasound mean acoustic intensity than MBControl (p < 0.05), however MBDual demonstrated no additional increase in mean signal intensity as compared to MBsLea. The degree of carotid artery stenosis on histology correlated well with the ultrasound acoustic intensity of targeted MB (p < 0.05). While dual targeting of MB using fast binding carbohydrate polymers and specific antibodies is a promising strategy to support adhesion to activated platelets under arterial shear stress, these advantages seem not readily translatable to in vivo models.
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Affiliation(s)
- F Günther
- Heart Center Freiburg University and Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - T Heidt
- Heart Center Freiburg University and Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - M Kramer
- Heart Center Freiburg University and Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - E Khanicheh
- University Hospital of Basel, Basel, Switzerland
| | | | - A Geibel-Zehender
- Heart Center Freiburg University and Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - E A Ferrante
- National Institute of Health, NHLBI, Bethesda, USA
| | - I Hilgendorf
- Heart Center Freiburg University and Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - D Wolf
- Heart Center Freiburg University and Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - A Zirlik
- Heart Center Freiburg University and Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - J Reinöhl
- Heart Center Freiburg University and Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - C Bode
- Heart Center Freiburg University and Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - K Peter
- Baker IDI Heart and Diabetes Institute, Melbourne, Australia
| | - B A Kaufmann
- University Hospital of Basel, Basel, Switzerland
| | - C von Zur Mühlen
- Heart Center Freiburg University and Faculty of Medicine, University of Freiburg, Freiburg, Germany.
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Ziegler M, Wang X, Lim B, Leitner E, Klingberg F, Ching V, Yao Y, Huang D, Gao XM, Kiriazis H, Du XJ, Haigh JJ, Bobik A, Hagemeyer CE, Ahrens I, Peter K. Platelet-Targeted Delivery of Peripheral Blood Mononuclear Cells to the Ischemic Heart Restores Cardiac Function after Ischemia-Reperfusion Injury. Theranostics 2017; 7:3192-3206. [PMID: 28900504 PMCID: PMC5595126 DOI: 10.7150/thno.19698] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Accepted: 05/30/2017] [Indexed: 12/25/2022] Open
Abstract
One of the major hurdles in intravenous regenerative cell therapy is the low homing efficiency to the area where these cells are needed. To increase cell homing toward areas of myocardial damage, we developed a bispecific tandem single-chain antibody (Tand-scFvSca-1+GPIIb/IIIa) that binds with high affinity to activated platelets via the activated glycoprotein (GP)IIb/IIIa receptor, and to a subset of peripheral blood mononuclear cells (PBMC) which express the stem cell antigen-1 (Sca-1) receptor. Methods: The Tand-scFvSca-1+GPIIb/IIIa was engineered, characterized and tested in a mouse model of ischemia-reperfusion (IR) injury applying left coronary artery occlusion for 60 min. Fluorescence cell tracking, cell infiltration studies, echocardiographic and histological analyses were performed. Results: Treatment of mice undergoing myocardial infarction with targeted-PBMCs led to successful cell delivery to the ischemic-reperfused myocardium, followed by a significant decrease in infiltration of inflammatory cells. Homing of targeted-PBMCs as shown by fluorescence cell tracking ultimately decreased fibrosis, increased capillary density, and restored cardiac function 4 weeks after ischemia-reperfusion injury. Conclusion: Tand-scFvSca-1+GPIIb/IIIa is a promising candidate to enhance therapeutic cell delivery in order to promote myocardial regeneration and thereby preventing heart failure.
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Ta HT, Li Z, Hagemeyer CE, Cowin G, Zhang S, Palasubramaniam J, Alt K, Wang X, Peter K, Whittaker AK. Molecular imaging of activated platelets via antibody-targeted ultra-small iron oxide nanoparticles displaying unique dual MRI contrast. Biomaterials 2017; 134:31-42. [DOI: 10.1016/j.biomaterials.2017.04.037] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Revised: 04/18/2017] [Accepted: 04/21/2017] [Indexed: 01/24/2023]
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Wang X, Peter K. Molecular Imaging of Atherothrombotic Diseases: Seeing Is Believing. Arterioscler Thromb Vasc Biol 2017; 37:1029-1040. [PMID: 28450298 DOI: 10.1161/atvbaha.116.306483] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 04/11/2017] [Indexed: 12/13/2022]
Abstract
Molecular imaging, with major advances in the development of both innovative targeted contrast agents/particles and radiotracers, as well as various imaging technologies, is a fascinating, rapidly growing field with many preclinical and clinical applications, particularly for personalized medicine. Thrombosis in either the venous or the arterial system, the latter typically caused by rupture of unstable atherosclerotic plaques, is a major determinant of mortality and morbidity in patients. However, imaging of the various thrombotic complications and the identification of plaques that are prone to rupture are at best indirect, mostly unreliable, or not available at all. The development of molecular imaging toward diagnosis and prevention of thrombotic disease holds promise for major advance in this clinically important field. Here, we review the medical need and clinical importance of direct molecular imaging of thrombi and unstable atherosclerotic plaques that are prone to rupture, thereby causing thrombotic complications such as myocardial infarction and ischemic stroke. We systematically compare the advantages/disadvantages of the various molecular imaging modalities, including X-ray computed tomography, magnetic resonance imaging, positron emission tomography, single-photon emission computed tomography, fluorescence imaging, and ultrasound. We further systematically discuss molecular targets specific for thrombi and those characterizing unstable, potentially thrombogenic atherosclerotic plaques. Finally, we provide examples for first theranostic approaches in thrombosis, combining diagnosis, targeted therapy, and monitoring of therapeutic success or failure. Overall, molecular imaging is a rapidly advancing field that holds promise of major benefits to many patients with atherothrombotic diseases.
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Affiliation(s)
- Xiaowei Wang
- From the Atherothrombosis and Vascular Biology Laboratory, Baker Heart and Diabetes Institute (X.W., K.P.), Departments of Medicine (X.W., K.P.), and Immunology (K.P.), Monash University, Melbourne, Victoria, Australia
| | - Karlheinz Peter
- From the Atherothrombosis and Vascular Biology Laboratory, Baker Heart and Diabetes Institute (X.W., K.P.), Departments of Medicine (X.W., K.P.), and Immunology (K.P.), Monash University, Melbourne, Victoria, Australia.
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30
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Cui C, Yang Z, Hu X, Wu J, Shou K, Ma H, Jian C, Zhao Y, Qi B, Hu X, Yu A, Fan Q. Organic Semiconducting Nanoparticles as Efficient Photoacoustic Agents for Lightening Early Thrombus and Monitoring Thrombolysis in Living Mice. ACS NANO 2017; 11:3298-3310. [PMID: 28240881 DOI: 10.1021/acsnano.7b00594] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Acute venous thrombosis is prevalent and potentially fatal. Accurate diagnosis of early thrombus is needed for patients in timely clinical intervention to prevent life-threatening conditions. Photoacoustic imaging (PAI) with excellent spatial resolution and high optical contrast shows more promise for this purpose. However, its application is dramatically limited by its signal-off effect on thrombus because of the ischemia in thrombus which lacks the endogenous photoacoustic (PA) signal of hemoglobin. To address this dilemma, we herein report the feasibility of using organic semiconducting nanoparticles (NPs) for contrast-enhanced PAI of thrombus in living mice. An organic semiconducting NP, self-assembled by amphiphilic perylene-3,4,9,10-tetracarboxylic diimide (PDI) molecules, is chemically modified with cyclic Arg-Gly-Asp (cRGD) peptides as a PA contrast agent (cRGD-PDI NPs) for selectively lightening early thrombus. cRGD-PDI NPs presents high PA intensity, good stability in light and serum, and sufficient blood-circulating half-life. In living mice, PA intensity of early thrombus significantly increases after tail vein injection of cRGD-PDI NPs, which is 4-fold greater than that of the control, blocking, and old thrombus groups. Pathological and immunohistochemical findings show that glycoprotein IIb/IIIa abundant in early thrombus is a good biomarker targeted by cRGD-PDI NPs for distinguishing early thrombus from old thrombus by PAI. Such a lightening PAI effect by cRGD-PDI NPs successfully provides accurate information including the profile, size and conformation, and spatial distribution of early thrombus, which may timely monitor the obstructive degree of thrombus in blood vessels and the thrombolysis effect.
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Affiliation(s)
- Cao Cui
- Department of Orthopedics, Zhongnan Hospital of Wuhan University , Wuhan, Hubei 430071, China
| | - Zhen Yang
- Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications , Nanjing 210023, China
| | - Xiang Hu
- Department of Orthopedics, Zhongnan Hospital of Wuhan University , Wuhan, Hubei 430071, China
| | - Jinjun Wu
- Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications , Nanjing 210023, China
| | - Kangquan Shou
- Department of Orthopedics, Zhongnan Hospital of Wuhan University , Wuhan, Hubei 430071, China
| | - Hengheng Ma
- Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications , Nanjing 210023, China
| | - Chao Jian
- Department of Orthopedics, Zhongnan Hospital of Wuhan University , Wuhan, Hubei 430071, China
| | - Yong Zhao
- Department of Orthopedics, Zhongnan Hospital of Wuhan University , Wuhan, Hubei 430071, China
| | - Baiwen Qi
- Department of Orthopedics, Zhongnan Hospital of Wuhan University , Wuhan, Hubei 430071, China
| | - Xiaoming Hu
- Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications , Nanjing 210023, China
| | - Aixi Yu
- Department of Orthopedics, Zhongnan Hospital of Wuhan University , Wuhan, Hubei 430071, China
| | - Quli Fan
- Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications , Nanjing 210023, China
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31
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Perez-Balderas F, van Kasteren SI, Aljabali AAA, Wals K, Serres S, Jefferson A, Sarmiento Soto M, Khrapitchev AA, Larkin JR, Bristow C, Lee SS, Bort G, De Simone F, Campbell SJ, Choudhury RP, Anthony DC, Sibson NR, Davis BG. Covalent assembly of nanoparticles as a peptidase-degradable platform for molecular MRI. Nat Commun 2017; 8:14254. [PMID: 28198362 PMCID: PMC5316865 DOI: 10.1038/ncomms14254] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Accepted: 12/08/2016] [Indexed: 12/02/2022] Open
Abstract
Ligand-conjugated microparticles of iron oxide (MPIO) have the potential to provide high sensitivity contrast for molecular magnetic resonance imaging (MRI). However, the accumulation and persistence of non-biodegradable micron-sized particles in liver and spleen precludes their clinical use and limits the translational potential of MPIO-based contrast agents. Here we show that ligand-targeted MPIO derived from multiple iron oxide nanoparticles may be coupled covalently through peptide linkers that are designed to be cleaved by intracellular macrophage proteases. The synthesized particles possess potential characteristics for targeted MRI contrast agents, including high relaxivity, unappreciable sedimentation, clearance from circulation and no overt toxicity. Importantly, we demonstrate that these particles are rapidly degraded both in vitro and in vivo, and that the targeted probes can be used for detection of inflammation in vivo using MRI. This approach provides a platform for molecular MRI contrast agents that is potentially more suitable for translation to humans.
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Affiliation(s)
- Francisco Perez-Balderas
- Department of Oncology, Cancer Research UK & Medical Research Council Oxford Institute for Radiation Oncology, University of Oxford, Oxford OX3 7DQ, UK
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, UK
| | - Sander I. van Kasteren
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, UK
| | - Alaa A. A. Aljabali
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, UK
- Department of Cardiovascular Medicine and Oxford Acute Vascular Imaging Centre, University of Oxford, John Radcliffe Hospital, Oxford OX3 9DU, UK
| | - Kim Wals
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, UK
- Department of Pharmacology, University of Oxford, Oxford OX1 3QT, UK
| | - Sébastien Serres
- Department of Oncology, Cancer Research UK & Medical Research Council Oxford Institute for Radiation Oncology, University of Oxford, Oxford OX3 7DQ, UK
| | - Andrew Jefferson
- Department of Cardiovascular Medicine and Oxford Acute Vascular Imaging Centre, University of Oxford, John Radcliffe Hospital, Oxford OX3 9DU, UK
| | - Manuel Sarmiento Soto
- Department of Oncology, Cancer Research UK & Medical Research Council Oxford Institute for Radiation Oncology, University of Oxford, Oxford OX3 7DQ, UK
| | - Alexandre A. Khrapitchev
- Department of Oncology, Cancer Research UK & Medical Research Council Oxford Institute for Radiation Oncology, University of Oxford, Oxford OX3 7DQ, UK
| | - James R Larkin
- Department of Oncology, Cancer Research UK & Medical Research Council Oxford Institute for Radiation Oncology, University of Oxford, Oxford OX3 7DQ, UK
| | - Claire Bristow
- Department of Oncology, Cancer Research UK & Medical Research Council Oxford Institute for Radiation Oncology, University of Oxford, Oxford OX3 7DQ, UK
| | - Seung Seo Lee
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, UK
| | - Guillaume Bort
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, UK
| | - Filippo De Simone
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, UK
| | - Sandra J. Campbell
- Department of Oncology, Cancer Research UK & Medical Research Council Oxford Institute for Radiation Oncology, University of Oxford, Oxford OX3 7DQ, UK
| | - Robin P. Choudhury
- Department of Cardiovascular Medicine and Oxford Acute Vascular Imaging Centre, University of Oxford, John Radcliffe Hospital, Oxford OX3 9DU, UK
| | - Daniel C. Anthony
- Department of Pharmacology, University of Oxford, Oxford OX1 3QT, UK
| | - Nicola R. Sibson
- Department of Oncology, Cancer Research UK & Medical Research Council Oxford Institute for Radiation Oncology, University of Oxford, Oxford OX3 7DQ, UK
| | - Benjamin G. Davis
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, UK
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Liu J, Xu J, Zhou J, Zhang Y, Guo D, Wang Z. Fe 3O 4-based PLGA nanoparticles as MR contrast agents for the detection of thrombosis. Int J Nanomedicine 2017; 12:1113-1126. [PMID: 28223802 PMCID: PMC5310639 DOI: 10.2147/ijn.s123228] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Thrombotic disease is a great threat to human health, and early detection is particularly important. Magnetic resonance (MR) molecular imaging provides noninvasive imaging with the potential for early disease diagnosis. In this study, we developed Fe3O4-based poly(lactic-co-glycolic acid) (PLGA) nanoparticles (NPs) surface-modified with a cyclic Arg-Gly-Asp (cRGD) peptide as an MR contrast agent for the detection of thrombosis. The physical and chemical characteristics, biological toxicity, ability to target thrombi, and biodistribution of the NPs were studied. The Fe3O4-PLGA-cRGD NPs were constructed successfully, and hematologic and pathologic assays indicated no in vivo toxicity of the NPs. In a rat model of FeCl3-induced abdominal aorta thrombosis, the NPs readily and selectively accumulated on the surface of the thrombosis and under vascular endothelial cells ex vivo and in vivo. In the in vivo experiment, the biodistribution of the NPs suggested that the NPs might be internalized by the macrophages of the reticuloendothelial system in the liver and the spleen. The T2 signal decreased at the mural thrombus 10 min after injection and then gradually increased until 50 min. These results suggest that the NPs are suitable for in vivo molecular imaging of thrombosis under high shear stress conditions and represent a very promising MR contrast agent for sensitive and specific detection of thrombosis.
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Affiliation(s)
| | | | | | | | | | - Zhigang Wang
- Department of Ultrasound, Institute of Ultrasound Imaging, The Second Affiliated Hospital of Chongqing Medical University, Yuzhong, Chongqing, People's Republic of China
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Zhang S, Cui Z, Xu T, Liu P, Li D, Shang S, Xu R, Zong Y, Niu G, Wang S, He X, Wan M. Inverse effects of flowing phase-shift nanodroplets and lipid-shelled microbubbles on subsequent cavitation during focused ultrasound exposures. ULTRASONICS SONOCHEMISTRY 2017; 34:400-409. [PMID: 27773262 DOI: 10.1016/j.ultsonch.2016.06.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Revised: 06/13/2016] [Accepted: 06/14/2016] [Indexed: 06/06/2023]
Abstract
This paper compared the effects of flowing phase-shift nanodroplets (NDs) and lipid-shelled microbubbles (MBs) on subsequent cavitation during focused ultrasound (FUS) exposures. The cavitation activity was monitored using a passive cavitation detection method as solutions of either phase-shift NDs or lipid-shelled MBs flowed at varying velocities through a 5-mm diameter wall-less vessel in a transparent tissue-mimicking phantom when exposed to FUS. The intensity of cavitation for the phase-shift NDs showed an upward trend with time and cavitation for the lipid-shelled MBs grew to a maximum at the outset of the FUS exposure followed by a trend of decreases when they were static in the vessel. Meanwhile, the increase of cavitation for the phase-shift NDs and decrease of cavitation for the lipid-shelled MBs had slowed down when they flowed through the vessel. During two discrete identical FUS exposures, while the normalized inertial cavitation dose (ICD) value for the lipid-shelled MB solution was higher than that for the saline in the first exposure (p-value <0.05), it decreased to almost the same level in the second exposure. For the phase-shift NDs, the normalized ICD was 0.71 in the first exposure and increased to 0.97 in the second exposure. At a low acoustic power, the normalized ICD values for the lipid-shelled MBs tended to increase with increasing velocities from 5 to 30cm/s (r>0.95). Meanwhile, the normalized ICD value for the phase-shift NDs was 0.182 at a flow velocity of 5cm/s and increased to 0.188 at a flow velocity of 15cm/s. As the flow velocity increased to 20cm/s, the normalized ICD was 0.185 and decreased to 0.178 at a flow velocity of 30cm/s. At high acoustic power, the normalized ICD values for both the lipid-shelled MBs and the phase-shift NDs increased with increasing flow velocities from 5 to 30cm/s (r>0.95). The effects of the flowing phase-shift NDs vaporized into gas bubbles as cavitation nuclei on the subsequent cavitation were inverse to those of the flowing lipid-shelled MBs destroyed after focused ultrasound exposures.
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Affiliation(s)
- Siyuan Zhang
- The Key Laboratory of Biomedical Information Engineering of the Ministry of Education, Department of Biomedical Engineering, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
| | - Zhiwei Cui
- The Key Laboratory of Biomedical Information Engineering of the Ministry of Education, Department of Biomedical Engineering, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
| | - Tianqi Xu
- The Key Laboratory of Biomedical Information Engineering of the Ministry of Education, Department of Biomedical Engineering, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
| | - Pan Liu
- The Key Laboratory of Biomedical Information Engineering of the Ministry of Education, Department of Biomedical Engineering, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
| | - Dapeng Li
- The Key Laboratory of Biomedical Information Engineering of the Ministry of Education, Department of Biomedical Engineering, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
| | - Shaoqiang Shang
- The Key Laboratory of Biomedical Information Engineering of the Ministry of Education, Department of Biomedical Engineering, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
| | - Ranxiang Xu
- The Key Laboratory of Biomedical Information Engineering of the Ministry of Education, Department of Biomedical Engineering, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
| | - Yujin Zong
- The Key Laboratory of Biomedical Information Engineering of the Ministry of Education, Department of Biomedical Engineering, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
| | - Gang Niu
- Department of Radiology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, People's Republic of China
| | - Supin Wang
- The Key Laboratory of Biomedical Information Engineering of the Ministry of Education, Department of Biomedical Engineering, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
| | - Xijing He
- Department of Orthopedics, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710004, People's Republic of China
| | - Mingxi Wan
- The Key Laboratory of Biomedical Information Engineering of the Ministry of Education, Department of Biomedical Engineering, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China.
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Ziegler M, Alt K, Paterson BM, Kanellakis P, Bobik A, Donnelly PS, Hagemeyer CE, Peter K. Highly Sensitive Detection of Minimal Cardiac Ischemia using Positron Emission Tomography Imaging of Activated Platelets. Sci Rep 2016; 6:38161. [PMID: 27909290 PMCID: PMC5133579 DOI: 10.1038/srep38161] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Accepted: 11/04/2016] [Indexed: 01/12/2023] Open
Abstract
A reliable method for the diagnosis of minimal cardiac ischemia would meet a strong demand for the sensitive diagnosis of coronary artery disease in cardiac stress testing and risk stratification in patients with chest pain but unremarkable ECGs and biomarkers. We hypothesized that platelets accumulate early on in ischemic myocardium and a newly developed technology of non-invasive molecular PET imaging of activated platelets can thus detect minimal degrees of myocardial ischemia. To induce different degrees of minimal cardiac ischemia, the left anterior descending artery (LAD) was ligated for 10, 20 or 60 min. Mice were injected with a newly generated scFvanti-GPIIb/IIIa-64CuMeCOSar radiotracer, composed of a single-chain antibody that only binds to activated integrin GPIIb/IIIa (αIIbβIII) and thus to activated platelets, and a sarcophagine cage MeCOSar complexing the long half-life PET tracer copper-64. A single PET/CT scan was performed. Evans Blue/TTC staining to detect necrosis as well as classical serological biomarkers like Troponin I and heart-type fatty acid-binding protein (H-FABP) were negative, whereas PET imaging of activated platelets was able to detect small degrees of ischemia. Taken together, molecular PET imaging of activated platelets represents a unique and highly sensitive method to detect minimal cardiac ischemia.
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Affiliation(s)
- Melanie Ziegler
- Atherothrombosis and Vascular Biology, Baker IDI Heart &Diabetes Institute, Melbourne, Australia
| | - Karen Alt
- Atherothrombosis and Vascular Biology, Baker IDI Heart &Diabetes Institute, Melbourne, Australia.,Vascular Biotechnology, Baker IDI Heart &Diabetes Institute, Melbourne, Australia
| | - Brett M Paterson
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Melbourne, Australia
| | - Peter Kanellakis
- Vascular Biology &Atherosclerosis, Baker IDI Heart &Diabetes Institute, Melbourne, Australia
| | - Alex Bobik
- Vascular Biology &Atherosclerosis, Baker IDI Heart &Diabetes Institute, Melbourne, Australia
| | - Paul S Donnelly
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Melbourne, Australia
| | - Christoph E Hagemeyer
- Vascular Biotechnology, Baker IDI Heart &Diabetes Institute, Melbourne, Australia.,Central Clinical School, Monash University, Melbourne, Australia.,RMIT University, Melbourne, Australia
| | - Karlheinz Peter
- Atherothrombosis and Vascular Biology, Baker IDI Heart &Diabetes Institute, Melbourne, Australia.,Central Clinical School, Monash University, Melbourne, Australia.,RMIT University, Melbourne, Australia
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35
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Kim J, Park JE, Nahrendorf M, Kim DE. Direct Thrombus Imaging in Stroke. J Stroke 2016; 18:286-296. [PMID: 27733029 PMCID: PMC5066439 DOI: 10.5853/jos.2016.00906] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Revised: 09/01/2016] [Accepted: 09/17/2016] [Indexed: 01/02/2023] Open
Abstract
There is an emergent need for imaging methods to better triage patients with acute stroke for tissue-plasminogen activator (tPA)-mediated thrombolysis or endovascular clot retrieval by directly visualizing the size and distribution of cerebral thromboemboli. Currently, magnetic resonance (MR) or computed tomography (CT) angiography visualizes the obstruction of blood flow within the vessel lumen rather than the thrombus itself. The present visualization method, which relies on observation of the dense artery sign (the appearance of cerebral thrombi on a non-enhanced CT), suffers from low sensitivity. When translated into the clinical setting, direct thrombus imaging is likely to enable individualized acute stroke therapy by allowing clinicians to detect the thrombus with high sensitivity, assess the size and nature of the thrombus more precisely, serially monitor the therapeutic effects of thrombolysis, and detect post-treatment recurrence. This review is intended to provide recent updates on stroke-related direct thrombus imaging using MR imaging, positron emission tomography, or CT.
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Affiliation(s)
- Jongseong Kim
- Molecular Imaging and Neurovascular Research (MINER) Laboratory, Dongguk University Ilsan Hospital, Goyang, Korea.,Global Research Laboratory for Thrombus-targeted Theranostics at Dongguk University Ilsan Hospital (Korea) and Massachusetts General Hospital ( USA )
| | - Jung E Park
- Department of Neurology, Dongguk University Ilsan Hospital, Goyang, Korea
| | - Matthias Nahrendorf
- Global Research Laboratory for Thrombus-targeted Theranostics at Dongguk University Ilsan Hospital (Korea) and Massachusetts General Hospital ( USA ).,Center for Systems Biology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Dong-Eog Kim
- Molecular Imaging and Neurovascular Research (MINER) Laboratory, Dongguk University Ilsan Hospital, Goyang, Korea.,Global Research Laboratory for Thrombus-targeted Theranostics at Dongguk University Ilsan Hospital (Korea) and Massachusetts General Hospital ( USA ).,Department of Neurology, Dongguk University Ilsan Hospital, Goyang, Korea
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36
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Molecular Imaging of Activated Platelets Allows the Detection of Pulmonary Embolism with Magnetic Resonance Imaging. Sci Rep 2016; 6:25044. [PMID: 27138487 PMCID: PMC4853725 DOI: 10.1038/srep25044] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Accepted: 04/08/2016] [Indexed: 01/04/2023] Open
Abstract
Early and reliable detection of pulmonary embolism (PE) is critical for improving patient morbidity and mortality. The desire for low-threshold screening for pulmonary embolism is contradicted by unfavorable radiation of currently used computed tomography or nuclear techniques, while standard magnetic resonance imaging still struggles to provide sufficient diagnostic sensitivity in the lung. In this study we evaluate a molecular-targeted contrast agent against activated platelets for non-invasive detection of murine pulmonary thromboembolism using magnetic resonance imaging. By intravenous injection of human thrombin, pulmonary thromboembolism were consistently induced as confirmed by immunohistochemistry of the lung. Magnetic resonance imaging after thrombin injection showed local tissue edema in weighted images which co-localized with the histological presence of pulmonary thromboembolism. Furthermore, injection of a functionalized contrast agent targeting activated platelets provided sensitive evidence of focal accumulation of activated platelets within the edematous area, which, ex vivo, correlated well with the size of the pulmonary embolism. In summary, we here show delivery and specific binding of a functionalized molecular contrast agent against activated platelets for targeting pulmonary thromboembolism. Going forward, molecular imaging may provide new opportunities to increase sensitivity of magnetic resonance imaging for detection of pulmonary embolism.
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37
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Wang X, Gkanatsas Y, Palasubramaniam J, Hohmann JD, Chen YC, Lim B, Hagemeyer CE, Peter K. Thrombus-Targeted Theranostic Microbubbles: A New Technology towards Concurrent Rapid Ultrasound Diagnosis and Bleeding-free Fibrinolytic Treatment of Thrombosis. Am J Cancer Res 2016; 6:726-38. [PMID: 27022419 PMCID: PMC4805666 DOI: 10.7150/thno.14514] [Citation(s) in RCA: 94] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Accepted: 02/08/2016] [Indexed: 12/29/2022] Open
Abstract
Rationale: Myocardial infarction and stroke are leading causes of morbidity/mortality. The typical underlying pathology is the formation of thrombi/emboli and subsequent vessel occlusion. Systemically administered fibrinolytic drugs are the most effective pharmacological therapy. However, bleeding complications are relatively common and this risk as such limits their broader use. Furthermore, a rapid non-invasive imaging technology is not available. Thereby, many thrombotic events are missed or only diagnosed when ischemic damage has already occurred. Objective: Design and preclinical testing of a novel 'theranostic' technology for the rapid non-invasive diagnosis and effective, bleeding-free treatment of thrombosis. Methods and Results: A newly created, innovative theranostic microbubble combines a recombinant fibrinolytic drug, an echo-enhancing microbubble and a recombinant thrombus-targeting device in form of an activated-platelet-specific single-chain antibody. After initial in vitro proof of functionality, we tested this theranostic microbubble both in ultrasound imaging and thrombolytic therapy using a mouse model of ferric-chloride-induced thrombosis in the carotid artery. We demonstrate the reliable highly sensitive detection of in vivo thrombi and the ability to monitor their size changes in real time. Furthermore, these theranostic microbubbles proofed to be as effective in thrombolysis as commercial urokinase but without the prolongation of bleeding time as seen with urokinase. Conclusions: We describe a novel theranostic technology enabling simultaneous diagnosis and treatment of thrombosis, as well as monitoring of success or failure of thrombolysis. This technology holds promise for major progress in rapid diagnosis and bleeding-free thrombolysis thereby potentially preventing the often devastating consequences of thrombotic disease in many patients.
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38
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Immunohistochemical Analysis of Cerebral Thrombi Retrieved by Mechanical Thrombectomy from Patients with Acute Ischemic Stroke. Int J Mol Sci 2016; 17:298. [PMID: 26927082 PMCID: PMC4813162 DOI: 10.3390/ijms17030298] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Revised: 02/17/2016] [Accepted: 02/17/2016] [Indexed: 12/21/2022] Open
Abstract
Mechanical thrombectomy is a novel treatment option for patients with acute ischemic stroke (AIS). Only a few studies have previously suggested strategies to categorize retrieved clots according to their histologic composition. However, these reports did not analyze potential biomarkers that are of importance in stroke-related inflammation. We therefore histopathologically investigated 37 intracerebral thrombi mechanically retrieved from patients with AIS, and focused on the composition of immune cells and platelets. We also conducted correlation analyses of distinctive morphologic patterns (erythrocytic, serpentine, layered, red, white, mixed appearance) with clinical parameters. Most T cells and monocytes were detected in erythrocytic and red clots, in which the distribution of these cells was random. In contrast, von Willebrand factor (vWF)-positive areas co-localized with regions of fibrin and collagen. While clots with huge amounts of vWF seem to be associated with a high National Institute of Health Stroke Scale score at admission, histologic findings could not predict the clinical outcome at discharge. In summary, we provide the first histologic description of mechanically retrieved intracerebral thrombi regarding biomarkers relevant for inflammation in ischemic stroke.
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Abstract
Atherosclerosis is a systemic condition that eventually evolves into vulnerable plaques and cardiovascular events. Pathology studies reveal that rupture-prone atherosclerotic plaques have a distinct morphology, namely a thin, inflamed fibrous cap covering a large lipidic and necrotic core. With the fast development of imaging techniques in the last decades, detecting vulnerable plaques thereby identifying individuals at high risk for cardiovascular events has become of major interest. Yet, in current clinical practice, there is no routine use of any vascular imaging modality to assess plaque characteristics as each unique technique has its pros and cons. This review describes the techniques that may evolve into screening tool for the detection of the vulnerable plaque. Finally, it seems that plaque morphology has been changing in the last decades leading to a higher prevalence of 'stable' atherosclerotic plaques, possibly due to the implementation of primary prevention strategies or other approaches. Therefore, the nomenclature of vulnerable plaque lesions should be very carefully defined in all studies.
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Affiliation(s)
- I Gonçalves
- Department of Cardiology and Clinical Sciences Malmö, Skåne University Hospital, Lund University, Malmö, Sweden
| | - H den Ruijter
- Laboratory of Experimental Cardiology and Research Laboratory Clinical Chemistry (LKCH), UMCU, Utrecht, the Netherlands
| | - M Nahrendorf
- Center for Systems Biology, Massachusetts General Hospital and Harvard Medical School, Simches Research Building, 185Cambridge St., Boston, MA02114, USA
| | - G Pasterkamp
- Laboratory of Experimental Cardiology and Research Laboratory Clinical Chemistry (LKCH), UMCU, Utrecht, the Netherlands
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40
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Hohmann JD, Peter K. Activated-platelet targeting of CD39 as a potential way forward. The quest for efficient antithrombotic therapy without associated bleeding complications. Hamostaseologie 2015; 36:17-25. [PMID: 26328528 DOI: 10.5482/hamo-14-12-0085] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Accepted: 08/27/2015] [Indexed: 01/20/2023] Open
Abstract
UNLABELLED Antiplatelet therapy is given to millions of patients and has saved numerous lives. However, it is also associated with complications including fatal bleedings. Clinically used antiplatelet drugs seem to follow the rule of an inherent link of improved anti-thrombotic potency with increased risk of bleeding complications. Therefore, there is an ongoing quest to develop drugs that are able to break this link that has prevented many patients from receiving antiplatelet protection and has resulted in substantial mortality and morbidity. We describe a new antiplatelet approach that is based on an recombinant antibody protein, a drug format that has recently attracted major interest. Two unique components are genetically combined in this molecule: 1) The ecto-nucleoside triphosphate diphosphohydrolase NTPDase CD39, which enzymatically degrades ATP and ADP to AMP, which is then further degraded to adenosine by the endothelially expressed CD73. Thereby, the platelet activating ADP is reduced and replaced by the platelet inhibiting adenosine resulting in a strong antiplatelet effect. 2) A single-chain antibody (scFv) that specifically binds to the activated GPIIb/IIIa receptor and thus allows targeting to activated platelets. The described fusion protein results in strong enrichment of CD39's antiplatelet effect, resulting in potent inhibition of platelet adhesion and aggregation and thrombosis in mice. The activated platelet targeting allows using a low systemic concentration that does not interfere with normal haemostasis and thus does not cause bleeding time prolongation in mice. CONCLUSION We describe a new antiplatelet approach that promises to deliver strong localized antithrombotic effects without associated bleeding problems.
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Affiliation(s)
| | - K Peter
- Prof. Karlheinz Peter, Baker IDI Heart and Diabetes Institute, PO Box 6492, St Kilda Road Central, Melbourne, Victoria 8008, Australia,
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41
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Lee N, Yoo D, Ling D, Cho MH, Hyeon T, Cheon J. Iron Oxide Based Nanoparticles for Multimodal Imaging and Magnetoresponsive Therapy. Chem Rev 2015; 115:10637-89. [PMID: 26250431 DOI: 10.1021/acs.chemrev.5b00112] [Citation(s) in RCA: 586] [Impact Index Per Article: 65.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Nohyun Lee
- School of Advanced Materials Engineering, Kookmin University , Seoul 136-702, Korea
| | - Dongwon Yoo
- Department of Chemistry, Yonsei University , Seoul 120-749, Korea
| | - Daishun Ling
- Center for Nanoparticle Research, Institute for Basic Science (IBS) , Seoul 151-742, Korea.,School of Chemical and Biological Engineering, Seoul National University , Seoul 151-742, Korea.,Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University , Hangzhou 310058, PR China
| | - Mi Hyeon Cho
- Department of Chemistry, Yonsei University , Seoul 120-749, Korea
| | - Taeghwan Hyeon
- Center for Nanoparticle Research, Institute for Basic Science (IBS) , Seoul 151-742, Korea.,School of Chemical and Biological Engineering, Seoul National University , Seoul 151-742, Korea
| | - Jinwoo Cheon
- Department of Chemistry, Yonsei University , Seoul 120-749, Korea
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42
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Meier S, Pütz G, Massing U, Hagemeyer C, von Elverfeldt D, Meißner M, Ardipradja K, Barnert S, Peter K, Bode C, Schubert R, von zur Muhlen C. Immuno-magnetoliposomes targeting activated platelets as a potentially human-compatible MRI contrast agent for targeting atherothrombosis. Biomaterials 2015; 53:137-48. [DOI: 10.1016/j.biomaterials.2015.02.088] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2014] [Revised: 02/13/2015] [Accepted: 02/19/2015] [Indexed: 11/26/2022]
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43
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Tomaszewski KA, Radomski MW, Santos-Martinez MJ. Nanodiagnostics, nanopharmacology and nanotoxicology of platelet–vessel wall interactions. Nanomedicine (Lond) 2015; 10:1451-75. [DOI: 10.2217/nnm.14.232] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
In physiological conditions, the interactions between blood platelets and endothelial cells play a major role in vascular reactivity and hemostasis. By contrast, increased platelet activation contributes to the pathogenesis of vascular pathology such as atherosclerosis, thrombosis, diabetes mellitus, hypertension and carcinogenesis. Nanomedicine, including nanodiagnostics and nanotherapeutics is poised to be used in the management of vascular diseases. However, the inherent risk and potential toxicity resultant from the use of nanosized (<100 nm) materials need to be carefully considered. This review, basing on a systematic search of literature provides state-of-the-art and focuses on new discoveries, as well as the potential benefits and threats in the field of nanodiagnostics, nanopharmacology and nanotoxicology of platelet–vessel wall interactions.
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Affiliation(s)
- Krzysztof A Tomaszewski
- School of Pharmacy & Pharmaceutical Sciences & Trinity Biomedical Sciences Institute, The University of Dublin Trinity College, Dublin, Ireland
- Department of Anatomy, Jagiellonian University Medical College, 12 Kopernika St, 31–034 Krakow, Poland
| | - Marek W Radomski
- School of Pharmacy & Pharmaceutical Sciences & Trinity Biomedical Sciences Institute, The University of Dublin Trinity College, Dublin, Ireland
- Kardio-Med Silesia, Zabrze, Poland
- Medical University of Silesia, Katowice, Poland
| | - Maria Jose Santos-Martinez
- School of Pharmacy & Pharmaceutical Sciences & Trinity Biomedical Sciences Institute, The University of Dublin Trinity College, Dublin, Ireland
- School of Medicine, The University of Dublin Trinity College, Dublin, Ireland
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44
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Estelrich J, Sánchez-Martín MJ, Busquets MA. Nanoparticles in magnetic resonance imaging: from simple to dual contrast agents. Int J Nanomedicine 2015; 10:1727-41. [PMID: 25834422 PMCID: PMC4358688 DOI: 10.2147/ijn.s76501] [Citation(s) in RCA: 187] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Magnetic resonance imaging (MRI) has become one of the most widely used and powerful tools for noninvasive clinical diagnosis owing to its high degree of soft tissue contrast, spatial resolution, and depth of penetration. MRI signal intensity is related to the relaxation times (T1, spin–lattice relaxation and T2, spin–spin relaxation) of in vivo water protons. To increase contrast, various inorganic nanoparticles and complexes (the so-called contrast agents) are administered prior to the scanning. Shortening T1 and T2 increases the corresponding relaxation rates, 1/T1 and 1/T2, producing hyperintense and hypointense signals respectively in shorter times. Moreover, the signal-to-noise ratio can be improved with the acquisition of a large number of measurements. The contrast agents used are generally based on either iron oxide nanoparticles or ferrites, providing negative contrast in T2-weighted images; or complexes of lanthanide metals (mostly containing gadolinium ions), providing positive contrast in T1-weighted images. Recently, lanthanide complexes have been immobilized in nanostructured materials in order to develop a new class of contrast agents with functions including blood-pool and organ (or tumor) targeting. Meanwhile, to overcome the limitations of individual imaging modalities, multimodal imaging techniques have been developed. An important challenge is to design all-in-one contrast agents that can be detected by multimodal techniques. Magnetoliposomes are efficient multimodal contrast agents. They can simultaneously bear both kinds of contrast and can, furthermore, incorporate targeting ligands and chains of polyethylene glycol to enhance the accumulation of nanoparticles at the site of interest and the bioavailability, respectively. Here, we review the most important characteristics of the nanoparticles or complexes used as MRI contrast agents.
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Affiliation(s)
- Joan Estelrich
- Departament de Fisicoquímica, Facultat de Farmàcia, Universitat de Barcelona, Barcelona, Catalonia, Spain ; Institut de Nanociència I Nanotecnologia (IN UB), Barcelona, Catalonia, Spain
| | - María Jesús Sánchez-Martín
- Departament de Fisicoquímica, Facultat de Farmàcia, Universitat de Barcelona, Barcelona, Catalonia, Spain
| | - Maria Antònia Busquets
- Departament de Fisicoquímica, Facultat de Farmàcia, Universitat de Barcelona, Barcelona, Catalonia, Spain ; Institut de Nanociència I Nanotecnologia (IN UB), Barcelona, Catalonia, Spain
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45
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Melemenidis S, Jefferson A, Ruparelia N, Akhtar AM, Xie J, Allen D, Hamilton A, Larkin JR, Perez-Balderas F, Smart SC, Muschel RJ, Chen X, Sibson NR, Choudhury RP. Molecular magnetic resonance imaging of angiogenesis in vivo using polyvalent cyclic RGD-iron oxide microparticle conjugates. Theranostics 2015; 5:515-29. [PMID: 25767618 PMCID: PMC4350013 DOI: 10.7150/thno.10319] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Accepted: 01/12/2015] [Indexed: 02/06/2023] Open
Abstract
Angiogenesis is an essential component of tumour growth and, consequently, an important target both therapeutically and diagnostically. The cell adhesion molecule α(v)β(3) integrin is a specific marker of angiogenic vessels and the most prevalent vascular integrin that binds the amino acid sequence arginine-glycine-aspartic acid (RGD). Previous studies using RGD-targeted nanoparticles (20-50 nm diameter) of iron oxide (NPIO) for magnetic resonance imaging (MRI) of tumour angiogenesis, have identified a number of limitations, including non-specific extravasation, long blood half-life (reducing specific contrast) and low targeting valency. The aim of this study, therefore, was to determine whether conjugation of a cyclic RGD variant [c(RGDyK)], with enhanced affinity for α(v)β(3), to microparticles of iron oxide (MPIO) would provide a more sensitive contrast agent for imaging of angiogenic tumour vessels. Cyclic RGD [c(RGDyK)] and RAD [c(RADyK)] based peptides were coupled to 2.8 μm MPIO, and binding efficacy tested both in vitro and in vivo. Significantly greater specific binding of c(RGDyK)-MPIO to S-nitroso-n-acetylpenicillamine (SNAP)-stimulated human umbilical vein endothelial cells in vitro than PBS-treated cells was demonstrated under both static (14-fold increase; P < 0.001) and flow (44-fold increase; P < 0.001) conditions. Subsequently, mice bearing subcutaneous colorectal (MC38) or melanoma (B16F10) derived tumours underwent in vivo MRI pre- and post-intravenous administration of c(RGDyK)-MPIO or c(RADyK)-MPIO. A significantly greater volume of MPIO-induced hypointensities were found in c(RGDyK)-MPIO injected compared to c(RADyK)-MPIO injected mice, in both tumour models (P < 0.05). Similarly, administration of c(RGDyK)-MPIO induced a greater reduction in mean tumour T(2)* relaxation times than the control agent in both tumour models (melanoma P < 0.001; colorectal P < 0.0001). Correspondingly, MPIO density per tumour volume assessed immunohistochemically was significantly greater for c(RGDyK)-MPIO than c(RADyK)-MPIO injected animals, in both melanoma (P < 0.05) and colorectal (P < 0.0005) tumours. In both cases, binding of c(RGDyK)-MPIO co-localised with α(v)β(3) expression. Comparison of RGD-targeted and dynamic contrast enhanced (DCE) MRI assessment of tumour perfusion indicated sensitivity to different vascular features. This study demonstrates specific binding of c(RGDyK)-MPIO to α(v)β(3) expressing neo-vessels, with marked and quantifiable contrast and rapid clearance of unbound particles from the blood circulation compared to NPIO. Combination of this molecular MRI approach with conventional DCE MRI will enable integrated molecular, anatomical and perfusion tumour imaging.
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Affiliation(s)
- Stavros Melemenidis
- 2. Cancer Research UK and Medical Research Council Oxford Institute for Radiation Oncology, Department of Oncology, University of Oxford, Oxford, UK
| | - Andrew Jefferson
- 1. Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, John Radcliffe Hospital, Oxford, OX3 9DU, United Kingdom
| | - Neil Ruparelia
- 1. Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, John Radcliffe Hospital, Oxford, OX3 9DU, United Kingdom
| | - Asim M Akhtar
- 1. Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, John Radcliffe Hospital, Oxford, OX3 9DU, United Kingdom
| | - Jin Xie
- 3. Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, Maryland 20892, United States
| | - Danny Allen
- 2. Cancer Research UK and Medical Research Council Oxford Institute for Radiation Oncology, Department of Oncology, University of Oxford, Oxford, UK
| | - Alastair Hamilton
- 2. Cancer Research UK and Medical Research Council Oxford Institute for Radiation Oncology, Department of Oncology, University of Oxford, Oxford, UK
| | - James R Larkin
- 2. Cancer Research UK and Medical Research Council Oxford Institute for Radiation Oncology, Department of Oncology, University of Oxford, Oxford, UK
| | - Francisco Perez-Balderas
- 2. Cancer Research UK and Medical Research Council Oxford Institute for Radiation Oncology, Department of Oncology, University of Oxford, Oxford, UK
| | - Sean C Smart
- 2. Cancer Research UK and Medical Research Council Oxford Institute for Radiation Oncology, Department of Oncology, University of Oxford, Oxford, UK
| | - Ruth J Muschel
- 2. Cancer Research UK and Medical Research Council Oxford Institute for Radiation Oncology, Department of Oncology, University of Oxford, Oxford, UK
| | - Xiaoyuan Chen
- 3. Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, Maryland 20892, United States
| | - Nicola R Sibson
- 2. Cancer Research UK and Medical Research Council Oxford Institute for Radiation Oncology, Department of Oncology, University of Oxford, Oxford, UK
| | - Robin P Choudhury
- 1. Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, John Radcliffe Hospital, Oxford, OX3 9DU, United Kingdom
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47
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Taylor JO, Witmer KP, Neuberger T, Craven BA, Meyer RS, Deutsch S, Manning KB. In vitro quantification of time dependent thrombus size using magnetic resonance imaging and computational simulations of thrombus surface shear stresses. J Biomech Eng 2014; 136:1870706. [PMID: 24805351 DOI: 10.1115/1.4027613] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Accepted: 05/08/2014] [Indexed: 11/08/2022]
Abstract
Thrombosis and thromboembolization remain large obstacles in the design of cardiovascular devices. In this study, the temporal behavior of thrombus size within a backward-facing step (BFS) model is investigated, as this geometry can mimic the flow separation which has been found to contribute to thrombosis in cardiac devices. Magnetic resonance imaging (MRI) is used to quantify thrombus size and collect topographic data of thrombi formed by circulating bovine blood through a BFS model for times ranging between 10 and 90 min at a constant upstream Reynolds number of 490. Thrombus height, length, exposed surface area, and volume are measured, and asymptotic behavior is observed for each as the blood circulation time is increased. Velocity patterns near, and wall shear stress (WSS) distributions on, the exposed thrombus surfaces are calculated using computational fluid dynamics (CFD). Both the mean and maximum WSS on the exposed thrombus surfaces are much more dependent on thrombus topography than thrombus size, and the best predictors for asymptotic thrombus length and volume are the reattachment length and volume of reversed flow, respectively, from the region of separated flow downstream of the BFS.
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Particle generation, functionalization and sortase A–mediated modification with targeting of single-chain antibodies for diagnostic and therapeutic use. Nat Protoc 2014; 10:90-105. [DOI: 10.1038/nprot.2014.177] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Kim W, Haller C, Dai E, Wang X, Hagemeyer CE, Liu DR, Peter K, Chaikof EL. Targeted antithrombotic protein micelles. Angew Chem Int Ed Engl 2014; 54:1461-5. [PMID: 25504546 DOI: 10.1002/anie.201408529] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Revised: 10/09/2014] [Indexed: 12/26/2022]
Abstract
Activated platelets provide a promising target for imaging inflammatory and thrombotic events along with site-specific delivery of a variety of therapeutic agents. Multifunctional protein micelles bearing targeting and therapeutic proteins were now obtained by one-pot transpeptidation using an evolved sortase A. Conjugation to the corona of a single-chain antibody (scFv), which binds to the ligand-induced binding site (LIBS) of activated GPIIb/IIIa receptors, enabled the efficient detection of thrombi. The inhibition of thrombus formation was subsequently accomplished by incorporating the catalytically active domain of thrombomodulin (TM) onto the micelle corona for the local generation of activated protein C, which inhibits the formation of thrombin. An effective strategy has been developed for the preparation of protein micelles that can be targeted to sites of activated platelets with broad potential for treatment of acute thrombotic events.
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Affiliation(s)
- Wookhyun Kim
- Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, 110 Francis St, Suite 9F, Boston, MA 02115 (USA); the Wyss Institute of Biologically Inspired Engineering of Harvard University, Boston, MA (USA)
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Abdalla AME, Xiao L, Ouyang C, Yang G. Engineered nanoparticles: thrombotic events in cancer. NANOSCALE 2014; 6:14141-14152. [PMID: 25347245 DOI: 10.1039/c4nr04825c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Engineered nanoparticles are being increasingly produced for specific applications in medicine. Broad selections of nano-sized constructs have been developed for applications in diagnosis, imaging, and drug delivery. Nanoparticles as contrast agents enable conjugation with molecular markers which are essential for designing effective diagnostic and therapeutic strategies. Such investigations can also lead to a better understanding of disease mechanisms such as cancer-associated thrombosis which remains unpredictable with serious bleeding complications and high risk of death. Here we review the recent and current applications of engineered nanoparticles in diagnosis and therapeutic strategies, noting their toxicity in relation to specific markers as a target.
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Affiliation(s)
- Ahmed M E Abdalla
- Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
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