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Mejlachowicz D, Lassiaz P, Zola M, Leclercq B, Gélizé E, Achiedo S, Zhao M, Rousseau A, Behar-Cohen F. Identification of Structures Labeled by Indocyanine Green in the Rat Choroid and Retina Can Guide Interpretation of Indocyanine Green Angiography. Invest Ophthalmol Vis Sci 2024; 65:25. [PMID: 38193758 PMCID: PMC10784846 DOI: 10.1167/iovs.65.1.25] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2023] [Accepted: 12/07/2023] [Indexed: 01/10/2024] Open
Abstract
Purpose Indocyanine green (ICG) is an albumin and lipoprotein binding dye absorbing in the far red used in angiography to visualize choroidal vessels (ICG angiography [ICGA]). To guide interpretation, ICG transport in the choroid, RPE, and retina of rats was studied. Methods Two conditions were used: RPE/choroid organoculture, incubated for 45 minutes in DMEM medium, 1% fetal bovine serum containing 0.25 mg/mL ICG and RPE/choroid and neural retina flat-mounts at 1 and 6 hours after intravenous ICG injection. Early and late sequences of ICGA were recorded until 6 hours. Ultra-deep red confocal microscope was used to localize ICG in flat-mounts and immunohistochemistry was performed for caveolin-1, tryptase (mast cell marker), and tubulin β3 (a nerve marker). Results In the organoculture, ICG penetrated homogeneously in the cytoplasm and stained the membranes of the RPE. At 1 hour after intravenous injection, ICG appeared in fine granules in RPE, partly labeled with caveolin-1 and decreasing at 6 hours. At 1 hour and 6 hours, ICG was found in the retinal vessels, faintly in the inner retina, and in the photoreceptor outer segments at 6 hours. In the choroid, ICG colocalized with mast cells, immunostained with tryptase, and accumulated along the large tubulin β3-labeled nerve bundles. The hypothesis was raised on the interpretation of late ICGA infrared photography in case of transthyretin amyloidosis with neuropathy. Conclusions Beside being a vascular dye, ICG is transported from the vessels to the RPE toward the outer retina. It stains mast cells and large choroidal nerves. These observations could help the analysis of ICGA images.
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Affiliation(s)
- Dan Mejlachowicz
- Centre de Recherche des Cordeliers, INSERM, Université Paris Cité, Sorbonne Université, Physiopathology of Ocular Diseases: Therapeutic Innovations, Paris, France
| | - Patricia Lassiaz
- Centre de Recherche des Cordeliers, INSERM, Université Paris Cité, Sorbonne Université, Physiopathology of Ocular Diseases: Therapeutic Innovations, Paris, France
| | - Marta Zola
- Centre de Recherche des Cordeliers, INSERM, Université Paris Cité, Sorbonne Université, Physiopathology of Ocular Diseases: Therapeutic Innovations, Paris, France
- Department of Ophthalmology, Hopital Foch, Suresnes, France
| | - Bastien Leclercq
- Centre de Recherche des Cordeliers, INSERM, Université Paris Cité, Sorbonne Université, Physiopathology of Ocular Diseases: Therapeutic Innovations, Paris, France
| | - Emmanuelle Gélizé
- Centre de Recherche des Cordeliers, INSERM, Université Paris Cité, Sorbonne Université, Physiopathology of Ocular Diseases: Therapeutic Innovations, Paris, France
| | - Seiki Achiedo
- Centre de Recherche des Cordeliers, INSERM, Université Paris Cité, Sorbonne Université, Physiopathology of Ocular Diseases: Therapeutic Innovations, Paris, France
| | - Min Zhao
- Centre de Recherche des Cordeliers, INSERM, Université Paris Cité, Sorbonne Université, Physiopathology of Ocular Diseases: Therapeutic Innovations, Paris, France
| | - Antoine Rousseau
- Department of Ophthalmology, Bicêtre Hospital, Assistance Publique - Hôpitaux de Paris, Paris-Saclay University, French Reference Center for hereditary transthyretin amyloidosis (NNERF), French Reference Network for rare Ophthalmic diseases (OPHTARA), Le Kremlin-Bicêtre, France
| | - Francine Behar-Cohen
- Centre de Recherche des Cordeliers, INSERM, Université Paris Cité, Sorbonne Université, Physiopathology of Ocular Diseases: Therapeutic Innovations, Paris, France
- Ophthalmopole Cochin University Hospital, Assistance Publique-Hôpitaux de Paris, France
- Department of Ophthalmology, Hopital Foch, Suresnes, France
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Giammanco G, Veneziano R, Dunn B, Such N, Cressman JR, Chitnis PV. DNA-Based Near-Infrared Voltage Sensors. ACS Sens 2023; 8:3680-3686. [PMID: 37725687 PMCID: PMC10616843 DOI: 10.1021/acssensors.3c01429] [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: 07/13/2023] [Accepted: 09/14/2023] [Indexed: 09/21/2023]
Abstract
Indocyanine green (ICG) is an FDA approved dye widely used for fluorescence imaging in research, surgical navigation, and medical diagnostics. However, ICG has a few drawbacks, such as concentration-dependent aggregation and absorbance, nonspecific cellular targeting, and rapid photobleaching. Here, we report a novel DNA-based nanosensor platform that utilizes monomers of ICG and cholesterol. Using DNA origami, we can attach ICG to a DNA structure, maintaining its concentration, preserving its near-infrared (NIR) absorbance, and allowing attachment of targeting moieties. We characterized the nanosensors' absorbance, stability in blood, and voltage sensing in vitro. This study presents a novel DNA-based ICG nanosensor platform for cellular voltage sensing for future in vivo applications.
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Affiliation(s)
- Giovanni Giammanco
- Department
of Bioengineering, George Mason University, Fairfax, Virginia 22030, United States
| | - Remi Veneziano
- Department
of Bioengineering, George Mason University, Fairfax, Virginia 22030, United States
- Institute
for Advanced Biomedical Research, George
Mason University, Manassas, Virginia 20110, United States
| | - Bryce Dunn
- Department
of Bioengineering, George Mason University, Fairfax, Virginia 22030, United States
| | - Nicholas Such
- Department
of Bioengineering, George Mason University, Fairfax, Virginia 22030, United States
| | - John R. Cressman
- Department
of Physics, George Mason University, Fairfax, Virginia 22030, United States
| | - Parag V. Chitnis
- Department
of Bioengineering, George Mason University, Fairfax, Virginia 22030, United States
- Center
for Adaptive Systems for Brain-body Interactions, George Mason University, Fairfax, Virginia 22030, United States
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Martišienė I, Mačianskienė R, Benetis R, Jurevičius J. Cardiac Optical Mapping in Situ in Swine Models: A View of the Current Situation. MEDICINA-LITHUANIA 2020; 56:medicina56110620. [PMID: 33217906 PMCID: PMC7698624 DOI: 10.3390/medicina56110620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 11/10/2020] [Accepted: 11/16/2020] [Indexed: 11/16/2022]
Abstract
Optical mapping is recognized as a promising tool for the registration of electrical activity in the heart. Most cardiac optical mapping experiments are performed in ex vivo isolated heart models. However, the electrophysiological properties of the heart are highly influenced by the autonomic nervous system as well as humoral regulation; therefore, in vivo investigations of heart activity in large animals are definitely preferred. Furthermore, such investigations can be considered the last step before clinical application. Recently, two comprehensive studies have examined optical mapping approaches for pig hearts in situ (in vivo), likely advancing the methodological capacity to perform complex electrophysiological investigations of the heart. Both studies had the same aim, i.e., to develop high-spatiotemporal-resolution optical mapping suitable for registration of electrical activity of pig heart in situ, but the methods chosen were different. In this brief review, we analyse and compare the results of recent studies and discuss their translational potential for in situ cardiac optical mapping applications in large animals. We focus on the modes of blood circulation that are employed, the use of different voltage-sensitive dyes and their loading procedures, and ways of eliminating contraction artefacts. Finally, we evaluate the possible scenarios for optical mapping (OM) application in large animals in situ and infer which scenario is optimal.
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Affiliation(s)
- Irma Martišienė
- Institute of Cardiology, Lithuanian University of Health Sciences, LT-50161 Kaunas, Lithuania; (I.M.); (R.M.); (R.B.)
| | - Regina Mačianskienė
- Institute of Cardiology, Lithuanian University of Health Sciences, LT-50161 Kaunas, Lithuania; (I.M.); (R.M.); (R.B.)
| | - Rimantas Benetis
- Institute of Cardiology, Lithuanian University of Health Sciences, LT-50161 Kaunas, Lithuania; (I.M.); (R.M.); (R.B.)
- Department of Cardiac, Thoracic and Vascular Surgery, Hospital of Lithuanian University of Health Sciences Kauno Klinikos, Lithuanian University of Health Sciences, LT-50161 Kaunas, Lithuania
| | - Jonas Jurevičius
- Institute of Cardiology, Lithuanian University of Health Sciences, LT-50161 Kaunas, Lithuania; (I.M.); (R.M.); (R.B.)
- Correspondence:
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4
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Optical mapping of the pig heart in situ under artificial blood circulation. Sci Rep 2020; 10:8548. [PMID: 32444634 PMCID: PMC7244500 DOI: 10.1038/s41598-020-65464-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Accepted: 04/22/2020] [Indexed: 12/05/2022] Open
Abstract
The emergence of optical imaging has revolutionized the investigation of cardiac electrical activity and associated disorders in various cardiac pathologies. The electrical signals of the heart and the propagation pathways are crucial for elucidating the mechanisms of various cardiac pathological conditions, including arrhythmia. The synthesis of near-infrared voltage-sensitive dyes and the voltage sensitivity of the FDA-approved dye Cardiogreen have increased the importance of optical mapping (OM) as a prospective tool in clinical practice. We aimed to develop a method for the high-spatiotemporal-resolution OM of the large animal hearts in situ using di-4-ANBDQBS and Cardiogreen under patho/physiological conditions. OM was adapted to monitor cardiac electrical behaviour in an open-chest pig heart model with physiological or artificial blood circulation. We detail the methods and display the OM data obtained using di-4-ANBDQBS and Cardiogreen. Activation time, action potential duration, repolarization time and conduction velocity maps were constructed. The technique was applied to track cardiac electrical activity during regional ischaemia and arrhythmia. Our study is the first to apply high-spatiotemporal-resolution OM in the pig heart in situ to record cardiac electrical activity qualitatively under artificial blood perfusion. The use of an FDA-approved voltage-sensitive dye and artificial blood perfusion in a swine model, which is generally accepted as a valuable pre-clinical model, demonstrates the promise of OM for clinical application.
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Chaudhary Z, Khan GM, Abeer MM, Pujara N, Wan-Chi Tse B, McGuckin MA, Popat A, Kumeria T. Efficient photoacoustic imaging using indocyanine green (ICG) loaded functionalized mesoporous silica nanoparticles. Biomater Sci 2020; 7:5002-5015. [PMID: 31617526 DOI: 10.1039/c9bm00822e] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Photoacoustic (PA) imaging is gaining momentum due to its greater depth of field, low background, and 3D imaging capabilities. However, traditional PA imaging agents (e.g. dyes, quantum dots, etc.) are usually unstable in plasma and bind to serum proteins, and thus cleared rapidly. Because of this, the nanoparticle encapsulation of PA imaging agents is becoming increasingly popular. Therefore, the rational design of carrier nanoparticles for this purpose is necessary for strong imaging signal intensity, high biosafety, and precise targeting. Herein, we systematically evaluate the influence of the chemical and physical surface functionalization of mesoporous silica nanoparticles (MSNs) on the photo-stability, loading, release, and photoacoustic (PA) signal strength of the FDA approved small molecule contrast agent, indocyanine green (ICG). Chemical functionalization involved the modification of MSNs with silanes having amine (NH2) or phosphonate (PO3) terminal groups, whereas physical modifications were performed by capping the ICG loaded MSNs with lipid bilayer (LB) or layer-by-layer (LBL) polyelectrolyte coatings. The NH2-MSNs display the highest ICG mass loading capacity (16.5 wt%) with a limited release of ICG (5%) in PBS over 48 h, while PO3-MSNs only loaded ICG around 3.5 wt%. The physically modified MSNs (i.e. LBMSNs and LBLMSNs) were vacuum loaded resulting in approximately 9 wt% loading and less than 10% ICG release in 48 h. Pure ICG was highly photo-unstable and showed 20% reduction in photoluminescence (PL) within 3 h of exposure to 800 nm, while the ICG loaded onto functionalized MSNs did not photo-degrade. Among the tested formulations, NH2-MSNs and LBLMSNs presented 4-fold in vitro PA signal intensity enhancement at a 200 μg mL-1 equivalent ICG dose. Similar to the in vitro PA imaging, NH2-MSNs and LBLMSNs performed the best when subcutaneously injected into mouse cadavers with 1.29- and 1.43-fold PA signal enhancement in comparison to the pure ICG, respectively.
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Affiliation(s)
- Zanib Chaudhary
- School of Pharmacy, The University of Queensland, Queensland-4102, Australia.
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Mačianskienė R, Martišienė I, Navalinskas A, Treinys R, Andriulė I, Jurevičius J. Mechanism of Action Potential Prolongation During Metabolic Inhibition in the Whole Rabbit Heart. Front Physiol 2018; 9:1077. [PMID: 30140239 PMCID: PMC6095129 DOI: 10.3389/fphys.2018.01077] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Accepted: 07/19/2018] [Indexed: 11/24/2022] Open
Abstract
Myocardial ischemia is associated with significant changes in action potential (AP) duration, which has a biphasic response to metabolic inhibition. Here, we investigated the mechanism of initial AP prolongation in whole Langendorff-perfused rabbit heart. We used glass microelectrodes to record APs transmurally. Simultaneously, optical AP, calcium transient (CaT), intracellular pH, and magnesium concentration changes were recorded using fluorescent dyes. The fluorescence signals were recorded using an EMCCD camera equipped with emission filters; excitation was induced by LEDs. We demonstrated that metabolic inhibition by carbonyl cyanide-p-trifluoromethoxyphenylhydrazone (FCCP) resulted in AP shortening preceded by an initial prolongation and that there were no important differences in the response throughout the wall of the heart and in the apical/basal direction. AP prolongation was reduced by blocking the ICaL and transient outward potassium current (Ito) with diltiazem (DTZ) and 4-aminopyridine (4-AP), respectively. FCCP, an uncoupler of oxidative phosphorylation, induced reductions in CaTs and intracellular pH and increased the intracellular Mg2+ concentration. In addition, resting potential depolarization was observed, clearly indicating a decrease in the inward rectifier K+ current (IK1) that can retard AP repolarization. Thus, we suggest that the main currents responsible for AP prolongation during metabolic inhibition are the ICaL, Ito, and IK1, the activities of which are modulated mainly by changes in intracellular ATP, calcium, magnesium, and pH.
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Affiliation(s)
- Regina Mačianskienė
- Institute of Cardiology, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Irma Martišienė
- Institute of Cardiology, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Antanas Navalinskas
- Institute of Cardiology, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Rimantas Treinys
- Institute of Cardiology, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Inga Andriulė
- Institute of Cardiology, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Jonas Jurevičius
- Institute of Cardiology, Lithuanian University of Health Sciences, Kaunas, Lithuania
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7
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Xue P, Yang R, Sun L, Li Q, Zhang L, Xu Z, Kang Y. Indocyanine Green-Conjugated Magnetic Prussian Blue Nanoparticles for Synchronous Photothermal/Photodynamic Tumor Therapy. NANO-MICRO LETTERS 2018; 10:74. [PMID: 30417006 PMCID: PMC6208784 DOI: 10.1007/s40820-018-0227-z] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Accepted: 10/08/2018] [Indexed: 05/06/2023]
Abstract
Indocyanine green (ICG) is capable of inducing a photothermal effect and the production of cytotoxic reactive oxygen species for cancer therapy. However, the major challenge in applying ICG molecules for antitumor therapy is associated with their instability in aqueous conditions and rapid clearance from blood circulation, which causes insufficient bioavailability at the tumor site. Herein, we conjugated ICG molecules with Prussian blue nanoparticles enclosing a Fe3O4 nanocore, which was facilitated by cationic polyethyleneimine via electrostatic adsorption. The nanocarrier-loaded ICG formed stable aggregates that enhanced cellular uptake and prevented fluorescence quenching. Moreover, the strong superparamagnetism of the Fe3O4 core in the obtained nanocomposites further improved cellular internalization of the drugs guided by a localized magnetic field. The therapeutic efficacy of this nanoplatform was evaluated using tumor models established in nude mice, which demonstrated remarkable tumor ablation in vivo due to strong photothermal/photodynamic effects. This study provides promising evidence that this multifunctional nanoagent might function as an efficient mediator for combining photothermal and photodynamic cancer therapy.
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Affiliation(s)
- Peng Xue
- Faculty of Materials and Energy, Institute for Clean Energy and Advanced Materials, Southwest University, Chongqing, 400715, People's Republic of China.
- Chongqing Engineering Research Center for Micro-Nano Biomedical Materials and Devices, Chongqing, 400715, People's Republic of China.
| | - Ruihao Yang
- Faculty of Materials and Energy, Institute for Clean Energy and Advanced Materials, Southwest University, Chongqing, 400715, People's Republic of China
- Chongqing Engineering Research Center for Micro-Nano Biomedical Materials and Devices, Chongqing, 400715, People's Republic of China
| | - Lihong Sun
- Faculty of Materials and Energy, Institute for Clean Energy and Advanced Materials, Southwest University, Chongqing, 400715, People's Republic of China
- Chongqing Engineering Research Center for Micro-Nano Biomedical Materials and Devices, Chongqing, 400715, People's Republic of China
| | - Qian Li
- Faculty of Materials and Energy, Institute for Clean Energy and Advanced Materials, Southwest University, Chongqing, 400715, People's Republic of China
- Chongqing Engineering Research Center for Micro-Nano Biomedical Materials and Devices, Chongqing, 400715, People's Republic of China
| | - Lei Zhang
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400716, People's Republic of China
| | - Zhigang Xu
- Faculty of Materials and Energy, Institute for Clean Energy and Advanced Materials, Southwest University, Chongqing, 400715, People's Republic of China
- Chongqing Engineering Research Center for Micro-Nano Biomedical Materials and Devices, Chongqing, 400715, People's Republic of China
| | - Yuejun Kang
- Faculty of Materials and Energy, Institute for Clean Energy and Advanced Materials, Southwest University, Chongqing, 400715, People's Republic of China.
- Chongqing Engineering Research Center for Micro-Nano Biomedical Materials and Devices, Chongqing, 400715, People's Republic of China.
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