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Ali S, de Gracia Lux C, Brown K, Endsley C, Woodward A, Mattrey R, Lux J. Modulating Nonlinear Acoustic Response of Phospholipid-Coated Microbubbles with pH for Ultrasound Imaging. ACS Sens 2024; 9:2356-2363. [PMID: 38752383 DOI: 10.1021/acssensors.3c02382] [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] [Indexed: 05/25/2024]
Abstract
Activatable microbubble contrast agents for contrast-enhanced ultrasound have a potential role for measuring physiologic and pathologic states in deep tissues, including tumor acidosis. In this study, we describe a novel observation of increased harmonic oscillation of phosphatidylcholine microbubbles (PC-MBs) in response to lower ambient pH using a clinical ultrasound scanner. MB echogenicity and nonlinear echoes were monitored at neutral and acidic pH using B-mode and Cadence contrast pulse sequencing (CPS), a harmonic imaging technique at 7.0 and 1.5 MHz. A 3-fold increase in harmonic signal intensity was observed when the pH of PC-MB suspensions was decreased from 7.4 to 5.5 to mimic normal and pathophysiological levels that can be encountered in vivo. This pH-mediated activation is tunable based on the chemical structure and length of phospholipids composing the MB shell. It is also reliant on the presence of phosphate groups, as the use of lipids without phosphate instead of phospholipids completely abrogated this phenomenon. The increased harmonic signal likely is the result of increased MB oscillation caused by a decrease of the interfacial tension induced at a lower pH, altering the lipid conformation. While relative signal changes are interpreted clinically as mostly related to blood flow, pH effects could be significant contributors, particularly when imaging tumors. While our observation can be used clinically, it requires further research to isolate the effect of pH from other variables. These findings could pave the way toward for the development of new smart ultrasound contrast agents that expand the clinical utility of contrast-enhanced ultrasound.
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Affiliation(s)
- Shariq Ali
- Department of Radiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390-8514, United States
| | - Caroline de Gracia Lux
- Department of Radiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390-8514, United States
| | - Katherine Brown
- Department of Bioengineering, University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080-3021, United States
| | - Connor Endsley
- Department of Radiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390-8514, United States
| | - Adam Woodward
- Department of Radiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390-8514, United States
| | - Robert Mattrey
- Department of Radiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390-8514, United States
| | - Jacques Lux
- Department of Radiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390-8514, United States
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2
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Rodriguez HM, Martyniuk M, Iyer KS, Ciampi S. Insulator-on-Conductor Fouling Amplifies Aqueous Electrolysis Rates. J Am Chem Soc 2024; 146:10299-10311. [PMID: 38591156 DOI: 10.1021/jacs.3c11238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/10/2024]
Abstract
The chemical industry is a major consumer of fossil fuels. Several chemical reactions of practical value proceed with the gain or loss of electrons, opening a path to integrate renewable electricity into chemical manufacturing. However, most organic molecules have low aqueous solubility, causing green and cheap electricity-driven reactions to suffer from intrinsically low reaction rates in industry's solvent of choice: water. Here, we show that a strategic, partial electrode fouling with hydrophobic insulators (oils and plastics) offsets kinetic limitations caused by poor reactant solubility, opening a new path for the direct integration of renewable electricity into the production of commodity chemicals. Through electrochemiluminescence microscopy, we reveal for the oxidation of organic reactants up to 6-fold reaction rate increase at the "fouled" oil-electrolyte-electrode interface relative to clean electrolyte-electrode areas. Analogously, electrodes partially masked (fouled) with plastic patterns, deposited either photolithographically (photoresists) or manually (inexpensive household glues and sealants), outperform clean electrodes. The effect is not limited to reactants of limited water solubility, and, for example, net gold electrodeposition rates are up to 22% larger at fouled than clean electrodes. In a system involving a surface-active reactant, rate augmentation is driven by the synergy between insulator-confined reactant enrichment and insulator-induced current crowding, whereas only the latter and possibly localized decrease in iR drop near the insulator are relevant in a system composed of non-surface-active species. Our counterintuitive electrode design enhances electrolysis rates despite the diminished area of intimate electrolyte-electrode contact and introduces a new path for upscaling aqueous electrochemical processes.
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Affiliation(s)
- Harry Morris Rodriguez
- School of Molecular and Life Sciences, Curtin University, Bentley, Western Australia 6102, Australia
| | - Mariusz Martyniuk
- Department of Electrical, Electronic and Computer Engineering, The University of Western Australia, Crawley, Western Australia 6009, Australia
| | - Killugudi Swaminathan Iyer
- School of Molecular Sciences, The University of Western Australia, Crawley, Western Australia 6009, Australia
| | - Simone Ciampi
- School of Molecular and Life Sciences, Curtin University, Bentley, Western Australia 6102, Australia
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3
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Kakaei N, Amirian R, Azadi M, Mohammadi G, Izadi Z. Perfluorocarbons: A perspective of theranostic applications and challenges. Front Bioeng Biotechnol 2023; 11:1115254. [PMID: 37600314 PMCID: PMC10436007 DOI: 10.3389/fbioe.2023.1115254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Accepted: 03/15/2023] [Indexed: 08/22/2023] Open
Abstract
Perfluorocarbon (PFC) are biocompatible compounds, chemically and biologically inert, and lacks toxicity as oxygen carriers. PFCs nanoemulsions and nanoparticles (NPs) are highly used in diagnostic imaging and enable novel imaging technology in clinical imaging modalities to notice and image pathological and physiological alterations. Therapeutics with PFCs such as the innovative approach to preventing thrombus formation, PFC nanodroplets utilized in ultrasonic medication delivery in arthritis, or PFC-based NPs such as Perfluortributylamine (PFTBA), Pentafluorophenyl (PFP), Perfluorohexan (PFH), Perfluorooctyl bromide (PFOB), and others, recently become renowned for oxygenating tumors and enhancing the effects of anticancer treatments as oxygen carriers for tumor hypoxia. In this review, we will discuss the recent advancements that have been made in PFC's applications in theranostic (therapeutics and diagnostics) as well as assess the benefits and drawbacks of these applications.
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Affiliation(s)
- Nasrin Kakaei
- Student Research Committee, School of Pharmacy, Kermanshah University of Medical Sciences, Kermanshah, Iran
- USERN Office, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Roshanak Amirian
- Student Research Committee, School of Pharmacy, Kermanshah University of Medical Sciences, Kermanshah, Iran
- USERN Office, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Mehdi Azadi
- Student Research Committee, School of Pharmacy, Kermanshah University of Medical Sciences, Kermanshah, Iran
- USERN Office, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Ghobad Mohammadi
- Pharmaceutical Sciences Research Center, Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Zhila Izadi
- USERN Office, Kermanshah University of Medical Sciences, Kermanshah, Iran
- Pharmaceutical Sciences Research Center, Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
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4
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Aliabouzar M, Kripfgans OD, Brian Fowlkes J, Fabiilli ML. Bubble nucleation and dynamics in acoustic droplet vaporization: a review of concepts, applications, and new directions. Z Med Phys 2023; 33:387-406. [PMID: 36775778 PMCID: PMC10517405 DOI: 10.1016/j.zemedi.2023.01.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 12/30/2022] [Accepted: 01/09/2023] [Indexed: 02/12/2023]
Abstract
The development of phase-shift droplets has broadened the scope of ultrasound-based biomedical applications. When subjected to sufficient acoustic pressures, the perfluorocarbon phase in phase-shift droplets undergoes a phase-transition to a gaseous state. This phenomenon, termed acoustic droplet vaporization (ADV), has been the subject of substantial research over the last two decades with great progress made in design of phase-shift droplets, fundamental physics of bubble nucleation and dynamics, and applications. Here, we review experimental approaches, carried out via high-speed microscopy, as well as theoretical models that have been proposed to study the fundamental physics of ADV including vapor nucleation and ADV-induced bubble dynamics. In addition, we highlight new developments of ADV in tissue regeneration, which is a relatively recently exploited application. We conclude this review with future opportunities of ADV for advanced applications such as in situ microrheology and pressure estimation.
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Affiliation(s)
- Mitra Aliabouzar
- Department of Radiology, University of Michigan, Ann Arbor, MI, USA; Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI, USA.
| | - Oliver D Kripfgans
- Department of Radiology, University of Michigan, Ann Arbor, MI, USA; Applied Physics Program, University of Michigan, Ann Arbor, MI, USA; Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA
| | - J Brian Fowlkes
- Department of Radiology, University of Michigan, Ann Arbor, MI, USA; Applied Physics Program, University of Michigan, Ann Arbor, MI, USA; Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA
| | - Mario L Fabiilli
- Department of Radiology, University of Michigan, Ann Arbor, MI, USA; Applied Physics Program, University of Michigan, Ann Arbor, MI, USA; Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA
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5
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Kennedy SR, Lafond M, Haworth KJ, Escudero DS, Ionascu D, Frierson B, Huang S, Klegerman ME, Peng T, McPherson DD, Genstler C, Holland CK. Initiating and imaging cavitation from infused echo contrast agents through the EkoSonic catheter. Sci Rep 2023; 13:6191. [PMID: 37062767 PMCID: PMC10106464 DOI: 10.1038/s41598-023-33164-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Accepted: 04/07/2023] [Indexed: 04/18/2023] Open
Abstract
Ultrasound-enhanced delivery of therapeutic-loaded echogenic liposomes is under development for vascular applications using the EkoSonic Endovascular System. In this study, fibrin-targeted echogenic liposomes loaded with an anti-inflammatory agent were characterized before and after infusion through an EkoSonic catheter. Cavitation activity was nucleated by Definity or fibrin-targeted, drug-loaded echogenic liposomes infused and insonified with EkoSonic catheters. Passive cavitation imaging was used to quantify and map bubble activity in a flow phantom mimicking porcine arterial flow. Cavitation was sustained during 3-min infusions of Definity or echogenic liposomes along the distal 6 cm treatment zone of the catheter. Though the EkoSonic catheter was not designed specifically for cavitation nucleation, infusion of drug-loaded echogenic liposomes can be employed to trigger and sustain bubble activity for enhanced intravascular drug delivery.
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Affiliation(s)
- Sonya R Kennedy
- Department of Internal Medicine, Division of Cardiovascular Health and Disease, University of Cincinnati, Cardiovascular Center 3935, 231 Albert Sabin Way, Cincinnati, OH, 45267-0586, USA
- Department of Biomedical Engineering, University of Cincinnati, Cincinnati, OH, USA
| | - Maxime Lafond
- Department of Internal Medicine, Division of Cardiovascular Health and Disease, University of Cincinnati, Cardiovascular Center 3935, 231 Albert Sabin Way, Cincinnati, OH, 45267-0586, USA
- LabTAU, Inserm, Université Lyon 1, Lyon, France
| | - Kevin J Haworth
- Department of Internal Medicine, Division of Cardiovascular Health and Disease, University of Cincinnati, Cardiovascular Center 3935, 231 Albert Sabin Way, Cincinnati, OH, 45267-0586, USA
- Department of Biomedical Engineering, University of Cincinnati, Cincinnati, OH, USA
| | - Daniel Suarez Escudero
- Department of Internal Medicine, Division of Cardiovascular Health and Disease, University of Cincinnati, Cardiovascular Center 3935, 231 Albert Sabin Way, Cincinnati, OH, 45267-0586, USA
| | - Dan Ionascu
- Department of Radiation Oncology, College of Medicine, University of Cincinnati, Cincinnati, OH, USA
| | - Brion Frierson
- Department of Internal Medicine, The University of Texas Health Science Center at Houston, Houston, TX, USA
| | - Shaoling Huang
- Department of Internal Medicine, The University of Texas Health Science Center at Houston, Houston, TX, USA
| | - Melvin E Klegerman
- Department of Internal Medicine, The University of Texas Health Science Center at Houston, Houston, TX, USA
| | - Tao Peng
- Department of Internal Medicine, The University of Texas Health Science Center at Houston, Houston, TX, USA
| | - David D McPherson
- Department of Internal Medicine, The University of Texas Health Science Center at Houston, Houston, TX, USA
| | | | - Christy K Holland
- Department of Internal Medicine, Division of Cardiovascular Health and Disease, University of Cincinnati, Cardiovascular Center 3935, 231 Albert Sabin Way, Cincinnati, OH, 45267-0586, USA.
- Department of Biomedical Engineering, University of Cincinnati, Cincinnati, OH, USA.
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6
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Tabata H, Koyama D, Matsukawa M, Krafft MP, Yoshida K. Concentration-Dependent Viscoelasticity of Poloxamer-Shelled Microbubbles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:433-441. [PMID: 36580034 DOI: 10.1021/acs.langmuir.2c02690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The oscillation of shelled microbubbles during exposure to ultrasound is influenced by the mechanical properties of the shell components. The oscillation behavior of bubbles coated with various phospholipids and other amphiphiles has been studied. However, there have been few investigations of how the adsorption conditions of the shell molecules relate to the viscoelastic properties of the shell and influence the oscillation behavior of the bubbles. In the present study, we investigated the oscillation characteristics of microbubbles coated with a poloxamer surfactant, that is, Pluronic F-68, at several concentrations after the adsorption kinetics of the surfactant at the gas-water interface had reached equilibrium. The dilatational viscoelasticity of the shell during exposure to ultrasound was analyzed in the frequency domain from the attenuation characteristics of the acoustic pulses propagated in the bubble suspension. At Pluronic F-68 concentrations lower than 2.0 × 10-2 mol L-1, the attenuation characteristics typically exhibited a sharp peak. At concentrations higher than 2.0 × 10-2 mol L-1, the peak flattened. The dilatational elasticity and viscosity of the shell were estimated by fitting the theoretical model to the experimental values, which revealed that both the elasticity and viscosity increased markedly at approximately 2.0 × 10-2 mol L-1. This suggests that the adsorption properties of Pluronic F-68 strongly affect the oscillation characteristics of microbubbles of a size suitable for medical ultrasound diagnostics.
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Affiliation(s)
- Hiraku Tabata
- Faculty of Science and Engineering, Doshisha University, 1-3 Tataramiyakodani, Kyotanabe, Kyoto610-0321, Japan
| | - Daisuke Koyama
- Faculty of Science and Engineering, Doshisha University, 1-3 Tataramiyakodani, Kyotanabe, Kyoto610-0321, Japan
| | - Mami Matsukawa
- Faculty of Science and Engineering, Doshisha University, 1-3 Tataramiyakodani, Kyotanabe, Kyoto610-0321, Japan
| | - Marie Pierre Krafft
- Institut Charles Sadron (CNRS), University of Strasbourg, 23 rue du Loess, Strasbourg67034, France
| | - Kenji Yoshida
- Center for Frontier Medical Engineering, Chiba University, 1-33 Yayoicho, Inage-ku, Chiba263-8522, Japan
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7
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Cen J, Ye X, Liu X, Pan W, Zhang L, Zhang G, He N, Shen A, Hu J, Liu S. Fluorinated Copolypeptide‐Stabilized Microbubbles with Maleimide‐Decorated Surfaces as Long‐Term Ultrasound Contrast Agents. Angew Chem Int Ed Engl 2022; 61:e202209610. [DOI: 10.1002/anie.202209610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Indexed: 11/10/2022]
Affiliation(s)
- Jie Cen
- Department of Ultrasound Imaging & Department of Pharmacy The First Affiliated Hospital of USTC Division of Life Sciences and Medicine University of Science and Technology of China 17 Lujiang Road Hefei, Anhui Province 230001 China
- CAS Key Laboratory of Soft Matter Chemistry Department of Polymer Science and Engineering University of Science and Technology of China 96 Jinzhai Road Hefei, Anhui Province 230026 China
| | - Xianjun Ye
- Department of Ultrasound Imaging & Department of Pharmacy The First Affiliated Hospital of USTC Division of Life Sciences and Medicine University of Science and Technology of China 17 Lujiang Road Hefei, Anhui Province 230001 China
| | - Xiao Liu
- Department of Ultrasound Imaging & Department of Pharmacy The First Affiliated Hospital of USTC Division of Life Sciences and Medicine University of Science and Technology of China 17 Lujiang Road Hefei, Anhui Province 230001 China
| | - Wenhao Pan
- CAS Key Laboratory of Soft Matter Chemistry Department of Polymer Science and Engineering University of Science and Technology of China 96 Jinzhai Road Hefei, Anhui Province 230026 China
| | - Lei Zhang
- Department of Ultrasound Imaging & Department of Pharmacy The First Affiliated Hospital of USTC Division of Life Sciences and Medicine University of Science and Technology of China 17 Lujiang Road Hefei, Anhui Province 230001 China
| | - Guoying Zhang
- CAS Key Laboratory of Soft Matter Chemistry Department of Polymer Science and Engineering University of Science and Technology of China 96 Jinzhai Road Hefei, Anhui Province 230026 China
| | - Nianan He
- Department of Ultrasound Imaging & Department of Pharmacy The First Affiliated Hospital of USTC Division of Life Sciences and Medicine University of Science and Technology of China 17 Lujiang Road Hefei, Anhui Province 230001 China
| | - Aizong Shen
- Department of Ultrasound Imaging & Department of Pharmacy The First Affiliated Hospital of USTC Division of Life Sciences and Medicine University of Science and Technology of China 17 Lujiang Road Hefei, Anhui Province 230001 China
| | - Jinming Hu
- CAS Key Laboratory of Soft Matter Chemistry Department of Polymer Science and Engineering University of Science and Technology of China 96 Jinzhai Road Hefei, Anhui Province 230026 China
| | - Shiyong Liu
- CAS Key Laboratory of Soft Matter Chemistry Department of Polymer Science and Engineering University of Science and Technology of China 96 Jinzhai Road Hefei, Anhui Province 230026 China
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8
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Cen J, Ye X, Liu X, Pan W, Zhang L, Zhang G, He N, Shen A, Hu J, Liu S. Fluorinated Copolypeptide‐Stabilized Microbubbles with Maleimide‐Decorated Surfaces as Long‐Term Ultrasound Contrast Agents. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202209610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jie Cen
- China University of Science and Technology Department of Polymer Science and Engineering CHINA
| | - Xianjun Ye
- China University of Science and Technology Department of Ultrasound Imaging CHINA
| | - Xiao Liu
- China University of Science and Technology Department of Ultrasound Imaging CHINA
| | - Wenhao Pan
- China University of Science and Technology Department of Polymer Science and Engineering CHINA
| | - Lei Zhang
- China University of Science and Technology Department of Pharmacy CHINA
| | - Guoying Zhang
- China University of Science and Technology Department of Polymer Science and Engineering CHINA
| | - Nianan He
- China University of Science and Technology Department of Ultrasound Imaging CHINA
| | - Aizong Shen
- China University of Science and Technology Department of Pharmacy CHINA
| | - Jinming Hu
- China University of Science and Technology Department of Polymer Science and Engineering 96 Jinzhai RoadDepartment of Polymer Science and EngineeringUniversity of Science and Technology of China 230026 Hefei CHINA
| | - Shiyong Liu
- University of Science and Technology of China Department of Polymer Science and Engineering 96 Jinzhai Road 230026 Hefei CHINA
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9
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Dogan S, Paulus M, Surmeier G, Foryt K, Brägelmann K, Tolan M. Nondestructive Compression and Fluidization of Phospholipid Monolayers by Gaseous and Aerolized Perfluorocarbons: Promising Substances for Lung Surfactant Treatment. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:6690-6699. [PMID: 35588471 DOI: 10.1021/acs.langmuir.2c00617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
We present a surface-sensitive X-ray scattering study on the influence of gaseous and aerolized perfluorocarbons (FCs) on zwitterionic and anionic phospholipid Langmuir films, which serve as a simplified model system of lung surfactants. It was found that small gaseous FC molecules like F-propane and F-butane penetrate phospholipid monolayers and accumulate between the alkyl chains and form islands. This clustering process can trigger the formation of lipid crystallites at low initial surface pressures. In contrast, the large linear FC F-octyl bromide fluidizes membranes, causing a dissolution of crystalline domains. The bicyclic FC F-decalin accumulates between the alkyl chains of 1,2-dipalmitoyl phosphatidylcholine but cannot penetrate the more densely packed 1,2-dipalmitoyl phosphatidic acid films because of its size. The effects of FCs on lung surfactants are discussed in the framework of currently proposed therapeutic methods for acute respiratory distress syndrome using FC gases, vapor, or aerosol ventilation causing monolayer fluidization effects. This study implies that the highly biocompatible and nontoxic FCs could be beneficial in the treatment of lung diseases with injured nonfunctional lung surfactants in a novel approach for ventilation.
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Affiliation(s)
- Susanne Dogan
- Fakultät Physik/DELTA, TU Dortmund, 44221 Dortmund, Germany
| | - Michael Paulus
- Fakultät Physik/DELTA, TU Dortmund, 44221 Dortmund, Germany
| | - Göran Surmeier
- Fakultät Physik/DELTA, TU Dortmund, 44221 Dortmund, Germany
| | - Kevin Foryt
- Fakultät Physik/DELTA, TU Dortmund, 44221 Dortmund, Germany
| | | | - Metin Tolan
- Fakultät Physik/DELTA, TU Dortmund, 44221 Dortmund, Germany
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10
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Kitazaki R, Nemoto H, Kanai T. Generation of Monodisperse Microbubbles with a Controlled Size of Less Than 10 µm at a Generation Rate on the Order of 10 5 Bubbles/s in Glass Capillary Microfluidic Devices. JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 2021. [DOI: 10.1252/jcej.20we191] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Risa Kitazaki
- Graduate School of Engineering Science, Yokohama National University
| | - Hikaru Nemoto
- Graduate School of Engineering Science, Yokohama National University
| | - Toshimitsu Kanai
- Graduate School of Engineering Science, Yokohama National University
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11
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Krafft MP, Riess JG. Therapeutic oxygen delivery by perfluorocarbon-based colloids. Adv Colloid Interface Sci 2021; 294:102407. [PMID: 34120037 DOI: 10.1016/j.cis.2021.102407] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 03/18/2021] [Accepted: 03/25/2021] [Indexed: 02/06/2023]
Abstract
After the protocol-related indecisive clinical trial of Oxygent, a perfluorooctylbromide/phospholipid nanoemulsion, in cardiac surgery, that often unduly assigned the observed untoward effects to the product, the development of perfluorocarbon (PFC)-based O2 nanoemulsions ("blood substitutes") has come to a low. Yet, significant further demonstrations of PFC O2-delivery efficacy have continuously been reported, such as relief of hypoxia after myocardial infarction or stroke; protection of vital organs during surgery; potentiation of O2-dependent cancer therapies, including radio-, photodynamic-, chemo- and immunotherapies; regeneration of damaged nerve, bone or cartilage; preservation of organ grafts destined for transplantation; and control of gas supply in tissue engineering and biotechnological productions. PFC colloids capable of augmenting O2 delivery include primarily injectable PFC nanoemulsions, microbubbles and phase-shift nanoemulsions. Careful selection of PFC and other colloid components is critical. The basics of O2 delivery by PFC nanoemulsions will be briefly reminded. Improved knowledge of O2 delivery mechanisms has been acquired. Advanced, size-adjustable O2-delivering nanoemulsions have been designed that have extended room-temperature shelf-stability. Alternate O2 delivery options are being investigated that rely on injectable PFC-stabilized microbubbles or phase-shift PFC nanoemulsions. The latter combine prolonged circulation in the vasculature, capacity for penetrating tumor tissues, and acute responsiveness to ultrasound and other external stimuli. Progress in microbubble and phase-shift emulsion engineering, control of phase-shift activation (vaporization), understanding and control of bubble/ultrasound/tissue interactions is discussed. Control of the phase-shift event and of microbubble size require utmost attention. Further PFC-based colloidal systems, including polymeric micelles, PFC-loaded organic or inorganic nanoparticles and scaffolds, have been devised that also carry substantial amounts of O2. Local, on-demand O2 delivery can be triggered by external stimuli, including focused ultrasound irradiation or tumor microenvironment. PFC colloid functionalization and targeting can help adjust their properties for specific indications, augment their efficacy, improve safety profiles, and expand the range of their indications. Many new medical and biotechnological applications involving fluorinated colloids are being assessed, including in the clinic. Further uses of PFC-based colloidal nanotherapeutics will be briefly mentioned that concern contrast diagnostic imaging, including molecular imaging and immune cell tracking; controlled delivery of therapeutic energy, as for noninvasive surgical ablation and sonothrombolysis; and delivery of drugs and genes, including across the blood-brain barrier. Even when the fluorinated colloids investigated are designed for other purposes than O2 supply, they will inevitably also carry and deliver a certain amount of O2, and may thus be considered for O2 delivery or co-delivery applications. Conversely, O2-carrying PFC nanoemulsions possess by nature a unique aptitude for 19F MR imaging, and hence, cell tracking, while PFC-stabilized microbubbles are ideal resonators for ultrasound contrast imaging and can undergo precise manipulation and on-demand destruction by ultrasound waves, thereby opening multiple theranostic opportunities.
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Affiliation(s)
- Marie Pierre Krafft
- University of Strasbourg, Institut Charles Sadron (CNRS), 23 rue du Loess, 67034 Strasbourg, France.
| | - Jean G Riess
- Harangoutte Institute, 68160 Ste Croix-aux-Mines, France
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12
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Hagimori M, Mendoza-Ortega EE, Krafft MP. Synthesis and physicochemical evaluation of fluorinated lipopeptide precursors of ligands for microbubble targeting. Beilstein J Org Chem 2021; 17:511-518. [PMID: 33727974 PMCID: PMC7934786 DOI: 10.3762/bjoc.17.45] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Accepted: 01/18/2021] [Indexed: 12/11/2022] Open
Abstract
Ligand-targeted microbubbles are focusing interest for molecular imaging and delivery of chemotherapeutics. Lipid-peptide conjugates (lipopeptides) that feature alternating serine-glycine (SG) n segments rather than classical poly(oxyethylene) linkers between the lipid polar head and a targeting ligand were proposed for the liposome-mediated, selective delivery of anticancer drugs. Here, we report the synthesis of perfluoroalkylated lipopeptides (F-lipopeptides) bearing two hydrophobic chains (C n F2 n +1, n = 6, 7, 8, 1-3) grafted through a lysine moiety on a hydrophilic chain composed of a lysine-serine-serine (KSS) sequence followed by 5 SG sequences. These F-lipopeptides are precursors of targeting lipopeptide conjugates. A hydrocarbon counterpart with a C10H21 chain (4) was synthesized for comparison. The capacity for the F-lipopeptides to spontaneously adsorb at the air/water interface and form monolayers when combined with dipalmitoylphosphatidylcholine (DPPC) was investigated. The F-lipopeptides 1-3 demonstrated a markedly enhanced tendency to form monolayers at the air/water interface, with equilibrium surface pressures reaching ≈7-10 mN m-1 versus less than 1 mN m-1 only for their hydrocarbon analog 4. The F-lipopeptides penetrate in the DPPC monolayers in both liquid expanded (LE) and liquid condensed (LC) phases without interfacial film destabilization. By contrast, 4 provokes delipidation of the interfacial film. The incorporation of the F-lipopeptides 1-3 in microbubbles with a shell of DPPC and dipalmitoylphosphatidylethanolamine-PEG2000 decreased their mean diameter and increased their stability, the best results being obtained for the C8F17-bearing lipopeptide 3. By contrast, the hydrocarbon lipopeptide led to microbubbles with a larger mean diameter and a significantly lower stability.
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Affiliation(s)
- Masayori Hagimori
- Institut Charles Sadron (CNRS), University of Strasbourg, 23 rue du Loess, 67034 Strasbourg CEDEX 2, France
- Faculty of Pharmaceutical Sciences, Mukogawa Women’s University, 11-68 Koshien Kyubancho, Nishinomiya 663-8179, Japan
- Graduate School of Biomedical Sciences, Nagasaki University, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan
| | - Estefanía E Mendoza-Ortega
- Institut Charles Sadron (CNRS), University of Strasbourg, 23 rue du Loess, 67034 Strasbourg CEDEX 2, France
| | - Marie Pierre Krafft
- Institut Charles Sadron (CNRS), University of Strasbourg, 23 rue du Loess, 67034 Strasbourg CEDEX 2, France
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13
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Abstract
Gas-filled microbubbles are currently in clinical use as blood pool contrast agents for ultrasound imaging. The goal of this review is to discuss the trends and issues related to these relatively unusual intravascular materials, which are not small molecules per se, not polymers, not even nanoparticles, but larger micrometer size structures, compressible, flexible, elastic, and deformable. The intent is to connect current research and initial studies from 2 to 3 decades ago, tied to gas exchange between the bubbles and surrounding biological medium, in the following areas of focus: (1) parameters of microbubble movement in relation to vasculature specifics; (2) gas uptake and loss from the bubbles in the vasculature; (3) adhesion of microbubbles to target receptors in the vasculature; and (4) microbubble interaction with the surrounding vessels and tissues during insonation.Microbubbles are generally safe and require orders of magnitude lower material doses than x-ray and magnetic resonance imaging contrast agents. Application of microbubbles will soon extend beyond blood pool contrast and tissue perfusion imaging. Microbubbles can probe molecular and cellular biomarkers of disease by targeted contrast ultrasound imaging. This approach is now in clinical trials, for example, with the aim to detect and delineate tumor nodes in prostate, breast, and ovarian cancer. Imaging of inflammation, ischemia-reperfusion injury, and ischemic memory is also feasible. More importantly, intravascular microbubbles can be used for local deposition of focused ultrasound energy to enhance drug and gene delivery to cells and tissues, across endothelial barrier, especially blood-brain barrier.Overall, microbubble behavior, stability and in vivo lifetime, bioeffects upon the action of ultrasound and resulting enhancement of drug and gene delivery, as well as targeted imaging are critically dependent on the events of gas exchange between the bubbles and surrounding media, as outlined in this review.
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Affiliation(s)
- Alexander L Klibanov
- From the Cardiovascular Division, Department of Medicine and Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine; and Departments of Biomedical Engineering, and Radiology, University of Virginia, Charlottesville, VA
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14
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Fernandes DA, Appak-Baskoy S, Berndl E, Kolios MC. Laser activatable perfluorocarbon bubbles for imaging and therapy through enhanced absorption from coupled silica coated gold nanoparticles. RSC Adv 2021; 11:4906-4920. [PMID: 35424456 PMCID: PMC8694477 DOI: 10.1039/d0ra08009h] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Accepted: 11/20/2020] [Indexed: 12/29/2022] Open
Abstract
Nanoparticles have extensively been used for cancer therapy and imaging (i.e., theranostics) using various imaging modalities. Due to their physical and chemical properties (e.g., absorption, fluorescence, and magnetic properties) they have been used for image guided therapy for cancer treatment monitoring. There are various limitations that make many theranostic agents unable to be used for the extended periods of time required for enhancing theranostic capabilities. Some of these are due to inherent characteristics (e.g., change and/or breakdown of structure) present upon continuous irradiation and others are due to environmental (i.e., physiological) conditions that can lead to physical instability (i.e., in terms of size) affecting the amount of particles that can accumulate at the target site and the overall contrast that can be achieved. In this study, perfluorohexane (PFH) nanoemulsions (NEs) were synthesized with silica coated gold nanoparticles (PFH-NEs-scAuNPs) in order to give both stable and enhanced signals for cancer imaging by increasing vaporization of the emulsions into bubbles through the process of optical droplet vaporization (ODV). The resulting perfluorohexane bubbles could be imaged using nonlinear ultrasound (NL US) which significantly increases the signal to noise ratio due to the nonlinear scattering properties of oscillating bubbles. The NL US signals from PFH bubbles were found to be more stable compared to conventional bubbles used for contrast imaging. In addition, the vaporization of PFH NEs into bubbles was shown to cause significant cancer cell death reflecting the theranostic capabilities of the formed PFH bubbles. Since cell death is initiated with laser excitation of PFH-NEs-scAuNPs, these nanoparticles can specifically target cancer cells once they have accumulated at the tumor region. Due to the type of theranostic agent and imaging modality used, the PFH-NEs-scAuNPs can be used to provide higher specificity compared to other agents for locating the tumor region by minimizing tissue specific signals while at the same time being used to treat cancer. PFH-NEs from PFH-NEs-scAuNPs can vaporize upon laser excitation leading to formation of PFH bubbles that can be used for contrast enhanced US imaging and therapy.![]()
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Affiliation(s)
- Donald A. Fernandes
- Department of Chemistry & Biology
- Ryerson University
- Toronto
- Canada
- Institute for Biomedical Engineering, Science and Technology (iBEST), A Partnership Between Ryerson University and St. Michael's Hospital
| | - Sila Appak-Baskoy
- Department of Chemistry & Biology
- Ryerson University
- Toronto
- Canada
- Institute for Biomedical Engineering, Science and Technology (iBEST), A Partnership Between Ryerson University and St. Michael's Hospital
| | - Elizabeth Berndl
- Institute for Biomedical Engineering, Science and Technology (iBEST), A Partnership Between Ryerson University and St. Michael's Hospital
- Toronto
- Canada
- Keenan Research Centre for Biomedical Science of St. Michael's Hospital
- Toronto
| | - Michael C. Kolios
- Institute for Biomedical Engineering, Science and Technology (iBEST), A Partnership Between Ryerson University and St. Michael's Hospital
- Toronto
- Canada
- Keenan Research Centre for Biomedical Science of St. Michael's Hospital
- Toronto
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15
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Stability of Engineered Micro or Nanobubbles for Biomedical Applications. Pharmaceutics 2020; 12:pharmaceutics12111089. [PMID: 33202709 PMCID: PMC7698255 DOI: 10.3390/pharmaceutics12111089] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 11/10/2020] [Accepted: 11/11/2020] [Indexed: 12/30/2022] Open
Abstract
A micro/nanobubble (MNB) refers to a bubble structure sized in a micrometer or nanometer scale, in which the core is separated from the external environment and is normally made of gas. Recently, it has been confirmed that MNBs can be widely used in angiography, drug delivery, and treatment. Thus, MNBs are attracting attention as they are capable of constructing a new contrast agent or drug delivery system. Additionally, in order to effectively use an MNB, the method of securing its stability is also being studied. This review highlights the factors affecting the stability of an MNB and the stability of the MNB within the ultrasonic field. It also discusses the relationship between the stability of the bubble and its applicability in vivo.
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16
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Hadji C, Dollet B, Bodiguel H, Drenckhan W, Coasne B, Lorenceau E. Impact of Fluorocarbon Gaseous Environments on the Permeability of Foam Films to Air. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:13236-13243. [PMID: 33103908 DOI: 10.1021/acs.langmuir.0c02158] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A foam film, free to move and stabilized with tetradecyltrimethylammonium bromide or sodium dodecylsulfate surfactants, is deposited inside of a cylindrical tube. It separates the tube into two distinct gaseous compartments. The first compartment is filled with air, while the second one contains a mixture of air and perfluorohexane vapor (C6F14), which is a barely water-soluble fluorinated compound. This foam film thus acts as a liquid semipermeable membrane for gases equivalent to the solid semipermeable membranes conventionally used in fluid separation processes. To infer the rate of air transfer through the membrane, we measure the displacement of the mobile foam film. From this, we deduce the instantaneous permeability of the membrane. In contrast to the permeability of solid membranes, which inexorably decreases over time because they become clogged, an anticlogging effect is observed with a permeability that systematically increases over time. Because the thickness of the film is constant over time, we attribute this to the possibility of adsorbing or desorbing fluorinated gas molecules on the liquid membrane. Indeed, because the partial pressure of the fluorinated gas is high at the beginning of the experiment, the density of the adsorbed molecules is also high, which leads to a low permeability to air transfer. On the contrary, at the end of the experiment, the partial pressure in fluorinated gas and thus the density of the adsorbed molecules are low. This leads to a higher permeability and a less clogged membrane.
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Affiliation(s)
- Céline Hadji
- Univ. Grenoble Alpes, CNRS, LIPhy, F-38000 Grenoble, France
| | | | - Hugues Bodiguel
- Univ. Grenoble Alpes, Grenoble-INP, CNRS, LRP UMR5520, F-38000 Grenoble, France
| | - Wiebke Drenckhan
- Univ. Strasbourg, CNRS, Institut Charles Sadron, UPR22, F-67000 Strasbourg, France
| | - Benoît Coasne
- Univ. Grenoble Alpes, CNRS, LIPhy, F-38000 Grenoble, France
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17
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Versluis M, Stride E, Lajoinie G, Dollet B, Segers T. Ultrasound Contrast Agent Modeling: A Review. ULTRASOUND IN MEDICINE & BIOLOGY 2020; 46:2117-2144. [PMID: 32546411 DOI: 10.1016/j.ultrasmedbio.2020.04.014] [Citation(s) in RCA: 86] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 04/11/2020] [Accepted: 04/14/2020] [Indexed: 05/21/2023]
Abstract
Ultrasound is extensively used in medical imaging, being safe and inexpensive and operating in real time. Its scope of applications has been widely broadened by the use of ultrasound contrast agents (UCAs) in the form of microscopic bubbles coated by a biocompatible shell. Their increased use has motivated a large amount of research to understand and characterize their physical properties as well as their interaction with the ultrasound field and their surrounding environment. Here we review the theoretical models that have been proposed to study and predict the behavior of UCAs. We begin with a brief introduction on the development of UCAs. We then present the basics of free-gas-bubble dynamics upon which UCA modeling is based. We review extensively the linear and non-linear models for shell elasticity and viscosity and present models for non-spherical and asymmetric bubble oscillations, especially in the presence of surrounding walls or tissue. Then, higher-order effects such as microstreaming, shedding and acoustic radiation forces are considered. We conclude this review with promising directions for the modeling and development of novel agents.
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Affiliation(s)
- Michel Versluis
- Physics of Fluids Group, MESA+ Institute for Nanotechnology, Technical Medical (TechMed) Center, University of Twente, Enschede, the Netherlands.
| | - Eleanor Stride
- Department of Engineering Science, Institute of Biomedical Engineering, University of Oxford, Oxford, UK
| | - Guillaume Lajoinie
- Physics of Fluids Group, MESA+ Institute for Nanotechnology, Technical Medical (TechMed) Center, University of Twente, Enschede, the Netherlands
| | - Benjamin Dollet
- Centre National de la Recherche Scientifique (CNRS), Laboratoire Interdisciplinaire de Physique (LIPhy), Université Grenoble Alpes, Grenoble, France
| | - Tim Segers
- Physics of Fluids Group, MESA+ Institute for Nanotechnology, Technical Medical (TechMed) Center, University of Twente, Enschede, the Netherlands
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18
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Siemer S, Wünsch D, Khamis A, Lu Q, Scherberich A, Filippi M, Krafft MP, Hagemann J, Weiss C, Ding GB, Stauber RH, Gribko A. Nano Meets Micro-Translational Nanotechnology in Medicine: Nano-Based Applications for Early Tumor Detection and Therapy. NANOMATERIALS 2020; 10:nano10020383. [PMID: 32098406 PMCID: PMC7075286 DOI: 10.3390/nano10020383] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 02/03/2020] [Accepted: 02/15/2020] [Indexed: 02/07/2023]
Abstract
Nanomaterials have great potential for the prevention and treatment of cancer. Circulating tumor cells (CTCs) are cancer cells of solid tumor origin entering the peripheral blood after detachment from a primary tumor. The occurrence and circulation of CTCs are accepted as a prerequisite for the formation of metastases, which is the major cause of cancer-associated deaths. Due to their clinical significance CTCs are intensively discussed to be used as liquid biopsy for early diagnosis and prognosis of cancer. However, there are substantial challenges for the clinical use of CTCs based on their extreme rarity and heterogeneous biology. Therefore, methods for effective isolation and detection of CTCs are urgently needed. With the rapid development of nanotechnology and its wide applications in the biomedical field, researchers have designed various nano-sized systems with the capability of CTCs detection, isolation, and CTCs-targeted cancer therapy. In the present review, we summarize the underlying mechanisms of CTC-associated tumor metastasis, and give detailed information about the unique properties of CTCs that can be harnessed for their effective analytical detection and enrichment. Furthermore, we want to give an overview of representative nano-systems for CTC isolation, and highlight recent achievements in microfluidics and lab-on-a-chip technologies. We also emphasize the recent advances in nano-based CTCs-targeted cancer therapy. We conclude by critically discussing recent CTC-based nano-systems with high therapeutic and diagnostic potential as well as their biocompatibility as a practical example of applied nanotechnology.
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Affiliation(s)
- Svenja Siemer
- Nanobiomedicine Department, University Medical Center Mainz/ENT, Langenbeckstrasse 1, 55131 Mainz, Germany
| | - Désirée Wünsch
- Nanobiomedicine Department, University Medical Center Mainz/ENT, Langenbeckstrasse 1, 55131 Mainz, Germany
| | - Aya Khamis
- Nanobiomedicine Department, University Medical Center Mainz/ENT, Langenbeckstrasse 1, 55131 Mainz, Germany
| | - Qiang Lu
- Nanobiomedicine Department, University Medical Center Mainz/ENT, Langenbeckstrasse 1, 55131 Mainz, Germany
| | - Arnaud Scherberich
- Laboratory of Tissue Engineering, Universitätspital Basel, Hebelstrasse 20, CH-4031 Basel, Switzerland (M.F.)
| | - Miriam Filippi
- Laboratory of Tissue Engineering, Universitätspital Basel, Hebelstrasse 20, CH-4031 Basel, Switzerland (M.F.)
| | - Marie Pierre Krafft
- Institut Charles Sadron (CNRS), University of Strasbourg, 23 rue du Loess, 67034 Strasbourg Cedex, France
| | - Jan Hagemann
- Nanobiomedicine Department, University Medical Center Mainz/ENT, Langenbeckstrasse 1, 55131 Mainz, Germany
| | - Carsten Weiss
- Institute of Biological and Chemical Systems-Biological Information Processing (IBCS-BIP), Postfach 3640, 76021 Karlsruhe, Germany
| | - Guo-Bin Ding
- Institute for Biotechnology, Shanxi University, No. 92 Wucheng Road, 030006 Taiyuan, China
| | - Roland H. Stauber
- Nanobiomedicine Department, University Medical Center Mainz/ENT, Langenbeckstrasse 1, 55131 Mainz, Germany
- Institute for Biotechnology, Shanxi University, No. 92 Wucheng Road, 030006 Taiyuan, China
- Correspondence: (R.H.S.); (A.G.); Tel.: +49-6131-176030 (A.G.)
| | - Alena Gribko
- Nanobiomedicine Department, University Medical Center Mainz/ENT, Langenbeckstrasse 1, 55131 Mainz, Germany
- Correspondence: (R.H.S.); (A.G.); Tel.: +49-6131-176030 (A.G.)
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19
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Tabata H, Koyama D, Matsukawa M, Yoshida K, Krafft MP. Vibration Characteristics and Persistence of Poloxamer- or Phospholipid-Coated Single Microbubbles under Ultrasound Irradiation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:11322-11329. [PMID: 31419140 DOI: 10.1021/acs.langmuir.9b02006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Microbubbles shelled with soft materials are expected to find applications as ultrasound-sensitive drug delivery systems, including through sonoporation. Microbubbles with specific vibrational characteristics and long intravascular persistence are required for clinical uses. To achieve this aim, the kinetics of the microbubble shell components at the gas/liquid interface while being subjected to ultrasound need to be better understood. This paper investigates the vibration characteristics and lifetime of single microbubbles coated with a poloxamer surfactant, Pluronic F-68, and 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC) under ultrasound irradiation. Air- and perfluorohexane (PFH)-filled microbubbles coated with Pluronic F-68 and DMPC at several concentrations (0 to 10-2 mol L-1) were produced. An optical measurement system using a laser Doppler vibrometer and microscope was used to observe the radial vibration mode of single microbubbles. The vibrational displacement amplitude and resonance radius of Pluronic- or DMPC-coated microbubbles were found to depend very little on the concentrations. The resonance radius was around 65 μm at 38.8 kHz under all the experimental conditions investigated. The lifetime of the microbubbles was investigated simultaneously by measuring their temporal change in volume, and it was increased with Pluronic concentration. Remarkably, the oscillation amplitude of the bubble has an effect on the bubble lifetime. In other words, larger oscillation under the resonance condition accelerates the diffusion of the inner gas.
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Affiliation(s)
- Hiraku Tabata
- Faculty of Science and Engineering , Doshisha University , 1-3 Tataramiyakodani , Kyotanabe , Kyoto 610-0321 , Japan
| | - Daisuke Koyama
- Faculty of Science and Engineering , Doshisha University , 1-3 Tataramiyakodani , Kyotanabe , Kyoto 610-0321 , Japan
| | - Mami Matsukawa
- Faculty of Science and Engineering , Doshisha University , 1-3 Tataramiyakodani , Kyotanabe , Kyoto 610-0321 , Japan
| | - Kenji Yoshida
- Center for Frontier Medical Engineering , Chiba University , 1-33 Yayoicho , Inage-ku , Chiba 263-8522 , Japan
| | - Marie Pierre Krafft
- Institut Charles Sadron (CNRS) , University of Strasbourg , 23 rue du Loess , 67034 Strasbourg , France
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20
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Hall RL, Juan-Sing ZD, Hoyt K, Sirsi SR. Formulation and Characterization of Chemically Cross-linked Microbubble Clusters. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:10977-10986. [PMID: 31310715 PMCID: PMC7061884 DOI: 10.1021/acs.langmuir.9b00475] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The purpose of this study is to introduce a new concept of chemically cross-linked microbubble clusters (CCMCs), which are individual microbubble ultrasound contrast agents (UCAs) physically tethered together. We demonstrate a facile means of their production, characterize their size and stability, and describe how they can potentially be used in biomedical applications. By tethering UCAs together into CCMCs, we propose that novel methods of ultrasound mediated imaging and therapy can be developed through unique interbubble interactions in an ultrasound field. One of the major challenges in generating CCMCs is controlling aggregate sizes and maintaining stability against Ostwald ripening and coalescence. In this study, we demonstrate that chemically cross-linked microbubble clusters can produce small (<10 μm) quasi-stable complexes that slowly fuse into bubbles with individual gas cores. Furthermore, we demonstrate that this process can be driven with low-intensity ultrasound pulses, enabling a rapid fusion of clusters which could potentially be used to develop novel ultrasound contrast imaging and drug delivery strategies in future studies. The development of novel microbubble clusters presents a simple yet robust process for generating novel UCAs with a design that could allow for more versatility in contrast-enhanced ultrasound (CEUS), molecular imaging, and drug delivery applications. Additionally, microbubble clustering is a unique way to control size, shell, and gas compositions that can be used to study bubble ripening and coalescence in a highly controlled environment or study the behavior of mixed-microbubble populations.
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Affiliation(s)
- Ronald L. Hall
- University of Texas at Dallas, Richardson, Texas, 75080, United States
| | | | - Kenneth Hoyt
- University of Texas at Dallas, Richardson, Texas, 75080, United States
- University of Texas Southwestern, Dallas, Texas, 75390, United States
| | - Shashank R. Sirsi
- University of Texas at Dallas, Richardson, Texas, 75080, United States
- University of Texas Southwestern, Dallas, Texas, 75390, United States
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21
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Unga J, Kageyama S, Suzuki R, Omata D, Maruyama K. Scale-up production, characterization and toxicity of a freeze-dried lipid-stabilized microbubble formulation for ultrasound imaging and therapy. J Liposome Res 2019; 30:297-304. [DOI: 10.1080/08982104.2019.1649282] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Johan Unga
- Laboratory of Drug and Gene Delivery Research, Faculty of Pharma-Science, Teikyo University, Tokyo, Japan
| | - Saori Kageyama
- Laboratory of Drug and Gene Delivery Research, Faculty of Pharma-Science, Teikyo University, Tokyo, Japan
| | - Ryo Suzuki
- Laboratory of Drug and Gene Delivery Research, Faculty of Pharma-Science, Teikyo University, Tokyo, Japan
| | - Daiki Omata
- Laboratory of Drug and Gene Delivery Research, Faculty of Pharma-Science, Teikyo University, Tokyo, Japan
| | - Kazuo Maruyama
- Laboratory of Drug and Gene Delivery Research, Faculty of Pharma-Science, Teikyo University, Tokyo, Japan
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22
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Nakata M, Tanimura N, Koyama D, Krafft MP. Adsorption and Desorption of a Phospholipid from Single Microbubbles under Pulsed Ultrasound Irradiation for Ultrasound-Triggered Drug Delivery. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:10007-10013. [PMID: 30636425 DOI: 10.1021/acs.langmuir.8b03621] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Microbubbles have potential for applications as drug and gene delivery systems, in which the release of a substance is triggered by an ultrasonic pulse. In this paper, we discuss the adsorption and desorption of a film of phospholipid on the surface of a single microbubble under ultrasound irradiation. Our optical observation system consisted of a high-speed camera, a laser Doppler vibrometer, and an ultrasound cell; 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC) was used as the surfactant. The adsorption of the DMPC molecules onto the surface of the bubble was evaluated by measuring the contact angle between the bubble and a glass plate. A decrease of the contact angle of the bubble indicates desorption of the DMPC molecules from the bubble surface into the surrounding aqueous solution. The amount of DMPC molecules adsorbed on the bubble's surface is shown to decrease over time after bubble generation. The type and intensity of the pulsed ultrasound waves were varied so as to mimic ultrasound-triggered drug release. Increasing the number of cycles and the amplitude of the sound pressure of the pulsed ultrasound yielded a greater increase of the contact angle. We also measured the radial vibrations of the microbubbles in the ultrasound field. The vibrational characteristics of the microbubbles and the desorption characteristics of the DMPC molecules showed the same variation; namely, a greater sound pressure amplitude induced greater vibrational displacement and a larger amount of molecular desorption under resonance conditions. These results support the possibility of controlling drug release with pulsed ultrasound in a microbubble-based drug delivery system.
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Affiliation(s)
| | | | | | - Marie Pierre Krafft
- Institut Charles Sadron (CNRS) , University of Strasbourg , 23 rue du Loess , 67034 Strasbourg , France
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23
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Shi D, Liu X, Counil C, Krafft MP. Fluorocarbon Exposure Mode Markedly Affects Phospholipid Monolayer Behavior at the Gas/Liquid Interface: Impact on Size and Stability of Microbubbles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:10025-10033. [PMID: 30548072 DOI: 10.1021/acs.langmuir.8b03546] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Although most phospholipid-shelled microbubbles (MBs) investigated for medical applications are stabilized by a fluorocarbon (FC) gas, information on the interactions between the phospholipid and FC molecules at the gas/water interface remains scarce. We report that the procedure of introduction of perfluorohexane (F-hexane), that is, either in the gas phase above dimyristoylphosphatidylcholine (DMPC) or dipalmitoylphosphatidylcholine (DPPC) Langmuir monolayers, or in the aqueous subphase, radically affects the compression isotherms. When introduced in the gas phase, F-hexane is rapidly incorporated in the interfacial film, but is also readily desorbed upon compression and eventually totally expelled from the phospholipid monolayers. By contrast, when introduced in the aqueous phase, F-hexane remains trapped at the interface. These dissimilar outcomes demonstrate that the phospholipid monolayer acts as a barrier that effectively hinders the transfer of the FC across the interfacial film. F-hexane was also found to significantly accelerate the adsorption kinetics of the phospholipids at the gas/water interface and to lower the interfacial tension, as assessed by bubble profile analysis tensiometry. The extent of these effects is more pronounced when F-hexane is provided from the gas phase. The size and stability characteristics of DMPC- and DPPC-shelled microbubbles were also found to depend on how the FC is introduced. As compared to reference MBs prepared under nitrogen only, introduction of F-hexane always causes a decrease in MB mean radius. However, while for DMPC this decrease depends on the F-hexane introduction procedure, it is independent from the procedure and most pronounced (from ∼2.0 μm to ∼1.0 μm) for DPPC. Introducing the FC in the gas phase has the strongest effect on MB half-life (t1/2 = ∼1.8 and 6.8 h for DMPC and DPPC, respectively), as compared to when it is delivered through the aqueous phase (∼0.8 and ∼1.7 h). Fluorocarbonless reference DMPC and DPPC bubbles had a half-life of ∼0.5 and 0.8 h, respectively. The effects of F-hexane on MB characteristics are discussed with regard to the interactions between phospholipids and F-hexane and monolayer fluidization effect, as revealed by the Langmuir and tensiometric studies.
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Affiliation(s)
- Da Shi
- University of Strasbourg , Institut Charles Sadron (CNRS) , 23 rue du Loess , 67034 Strasbourg , Cedex , France
| | - Xianhe Liu
- University of Strasbourg , Institut Charles Sadron (CNRS) , 23 rue du Loess , 67034 Strasbourg , Cedex , France
| | - Claire Counil
- University of Strasbourg , Institut Charles Sadron (CNRS) , 23 rue du Loess , 67034 Strasbourg , Cedex , France
| | - Marie Pierre Krafft
- University of Strasbourg , Institut Charles Sadron (CNRS) , 23 rue du Loess , 67034 Strasbourg , Cedex , France
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24
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Abou-Saleh RH, McLaughlan JR, Bushby RJ, Johnson BR, Freear S, Evans SD, Thomson NH. Molecular Effects of Glycerol on Lipid Monolayers at the Gas-Liquid Interface: Impact on Microbubble Physical and Mechanical Properties. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:10097-10105. [PMID: 30901226 DOI: 10.1021/acs.langmuir.8b04130] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
The production and stability of microbubbles (MBs) is enhanced by increasing the viscosity of both the formation and storage solution, respectively. Glycerol is a good candidate for biomedical applications of MBs, since it is biocompatible, although the exact molecular mechanisms of its action is not fully understood. Here, we investigate the influence glycerol has on lipid-shelled MB properties, using a range of techniques. Population lifetime and single bubble stability were studied using optical microscopy. Bubble stiffness measured by AFM compression is compared with lipid monolayer behavior in a Langmuir-Blodgett trough. We deduce that increasing glycerol concentrations enhances stability of MB populations through a 3-fold mechanism. First, binding of glycerol to lipid headgroups in the interfacial monolayer up to 10% glycerol increases MB stiffness but has limited impact on shell resistance to gas permeation and corresponding MB lifetime. Second, increased solution viscosity above 10% glycerol slows down the kinetics of gas transfer, markedly increasing MB stability. Third, above 10%, glycerol induces water structuring around the lipid monolayer, forming a glassy layer which also increases MB stiffness and resistance to gas loss. At 30% glycerol, the glassy layer is ablated, lowering the MB stiffness, but MB stability is further augmented. Although the molecular interactions of glycerol with the lipid monolayer modulate the MB lipid shell properties, MB lifetime continually increases from 0 to 30% glycerol, indicating that its viscosity is the dominant effect on MB solution stability. This three-fold action and biocompatibility makes glycerol ideal for therapeutic MB formation and storage and gives new insight into the action of glycerol on lipid monolayers at the gas-liquid interface.
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Affiliation(s)
- Radwa H Abou-Saleh
- Molecular and Nanoscale Physics Group, School of Physics and Astronomy , University of Leeds , Leeds LS2 9JT , United Kingdom
- Biophysics Group, Department of Physics, Faculty of Science , Mansoura University , Mansoura , Egypt
| | - James R McLaughlan
- School of Electronic and Electrical Engineering , University of Leeds , Leeds LS2 9JT , United Kingdom
- Leeds Institute of Medical Research , University of Leeds, St. James's University Hospital , Leeds LS9 7TF , United Kingdom
| | - Richard J Bushby
- School of Chemistry , University of Leeds , Leeds LS2 9JT , United Kingdom
| | - Benjamin R Johnson
- Molecular and Nanoscale Physics Group, School of Physics and Astronomy , University of Leeds , Leeds LS2 9JT , United Kingdom
| | - Steven Freear
- School of Electronic and Electrical Engineering , University of Leeds , Leeds LS2 9JT , United Kingdom
| | - Stephen D Evans
- Molecular and Nanoscale Physics Group, School of Physics and Astronomy , University of Leeds , Leeds LS2 9JT , United Kingdom
| | - Neil H Thomson
- Molecular and Nanoscale Physics Group, School of Physics and Astronomy , University of Leeds , Leeds LS2 9JT , United Kingdom
- Division of Oral Biology, School of Dentistry , University of Leeds , Leeds LS2 9LU , United Kingdom
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25
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Shekhar H, Palaniappan A, Peng T, Lafond M, Moody MR, Haworth KJ, Huang S, McPherson DD, Holland CK. Characterization and Imaging of Lipid-Shelled Microbubbles for Ultrasound-Triggered Release of Xenon. Neurotherapeutics 2019; 16:878-890. [PMID: 31020629 PMCID: PMC6694347 DOI: 10.1007/s13311-019-00733-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Xenon (Xe) is a bioactive gas capable of reducing and stabilizing neurologic injury in stroke. The goal of this work was to develop lipid-shelled microbubbles for xenon loading and ultrasound-triggered release. Microbubbles loaded with either xenon (Xe-MB) or xenon and octafluoropropane (Xe-OFP-MB) (9:1 v/v) were synthesized by high-shear mixing. The size distribution and the frequency-dependent attenuation coefficient of Xe-MB and Xe-OFP-MB were measured using a Coulter counter and a broadband acoustic attenuation spectroscopy system, respectively. The Xe dose was evaluated using gas chromatography/mass spectrometry. The total Xe doses in Xe-MB and Xe-OFP-MB were 113.1 ± 13.5 and 145.6 ± 25.5 μl per mg of lipid, respectively. Co-encapsulation of OFP increased the total xenon dose, attenuation coefficient, microbubble stability (in an undersaturated solution), and shelf life of the agent. Triggered release of gas payload was demonstrated with 6-MHz duplex Doppler and 220-kHz pulsed ultrasound. These results constitute the first step toward the use of lipid-shelled microbubbles for applications such as neuroprotection in stroke.
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Affiliation(s)
- Himanshu Shekhar
- Division of Cardiovascular Health and Disease, Department of Internal Medicine, University of Cincinnati, Cincinnati, Ohio, USA.
| | - Arunkumar Palaniappan
- Division of Cardiovascular Health and Disease, Department of Internal Medicine, University of Cincinnati, Cincinnati, Ohio, USA
| | - Tao Peng
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of Texas Health Science Center at Houston, Houston, Texas, USA
| | - Maxime Lafond
- Division of Cardiovascular Health and Disease, Department of Internal Medicine, University of Cincinnati, Cincinnati, Ohio, USA
| | - Melanie R Moody
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of Texas Health Science Center at Houston, Houston, Texas, USA
| | - Kevin J Haworth
- Division of Cardiovascular Health and Disease, Department of Internal Medicine, University of Cincinnati, Cincinnati, Ohio, USA
- Department of Biomedical Engineering, University of Cincinnati, Cincinnati, Ohio, USA
| | - Shaoling Huang
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of Texas Health Science Center at Houston, Houston, Texas, USA
| | - David D McPherson
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of Texas Health Science Center at Houston, Houston, Texas, USA
| | - Christy K Holland
- Division of Cardiovascular Health and Disease, Department of Internal Medicine, University of Cincinnati, Cincinnati, Ohio, USA
- Department of Biomedical Engineering, University of Cincinnati, Cincinnati, Ohio, USA
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26
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Mielke S, Abuillan W, Veschgini M, Liu X, Konovalov O, Krafft MP, Tanaka M. Influence of Perfluorohexane‐Enriched Atmosphere on Viscoelasticity and Structural Order of Self‐Assembled Semifluorinated Alkanes at the Air‐Water Interface. Chemphyschem 2019; 20:1698-1705. [DOI: 10.1002/cphc.201900316] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 05/10/2019] [Indexed: 01/31/2023]
Affiliation(s)
- Salomé Mielke
- Physical Chemistry of Biosystems, Institute of Physical ChemistryHeidelberg University D-69120 Heidelberg Germany
| | - Wasim Abuillan
- Physical Chemistry of Biosystems, Institute of Physical ChemistryHeidelberg University D-69120 Heidelberg Germany
- Institute of Industrial ScienceThe University of Tokyo 153-0041 Tokyo Japan
| | - Mariam Veschgini
- Physical Chemistry of Biosystems, Institute of Physical ChemistryHeidelberg University D-69120 Heidelberg Germany
| | - Xianhe Liu
- Institut Charles Sadron (CNRS UPR 22)University of Strasbourg 23 rue du Loess F-67034 Strasbourg Cedex France
| | - Oleg Konovalov
- European Synchrotron Radiation Facility (ESRF) Grenoble Cedex 9 38053 France
| | - Marie Pierre Krafft
- Institut Charles Sadron (CNRS UPR 22)University of Strasbourg 23 rue du Loess F-67034 Strasbourg Cedex France
| | - Motomu Tanaka
- Physical Chemistry of Biosystems, Institute of Physical ChemistryHeidelberg University D-69120 Heidelberg Germany
- Center for Integrative Medicine and Physics Institute for Advanced StudyKyoto University 606-8501 Kyoto Japan
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27
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Fu X, Ohta S, Kamihira M, Sakai Y, Ito T. Size-Controlled Preparation of Microsized Perfluorocarbon Emulsions as Oxygen Carriers via the Shirasu Porous Glass Membrane Emulsification Technique. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:4094-4100. [PMID: 30791688 DOI: 10.1021/acs.langmuir.9b00194] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We have developed microsized perfluorocarbon (PFC) emulsions with different sizes as artificial oxygen carriers (OCs) via Shirasu porous glass membrane emulsification. Monodispersed PFC emulsions with narrow size distribution were obtained. By changing the membrane pore size, we were able to precisely control the size of emulsions and fabricate emulsions similar in size to human red blood cells. Behaviors of Pluronics with different physiochemical properties (F127, F68, P85, and P103) as surfactants were also investigated, which evidenced that the type and concentration of Pluronics have a major impact on the size of emulsions and the response to different thermal conditions. The F127-stabilized microsized PFC emulsions were stable even during autoclave sterilization. The emulsions were loaded with Ru(ddp)-an oxygen-sensitive probe-on their surfaces to indicate oxygen concentration. Finally, incubations with HeLa cells that show fluorescence in response to hypoxia cultured in 2D and 3D suggested promising potential of our emulsions for OCs.
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Affiliation(s)
- Xiaoting Fu
- Department of Bioengineering , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku, Tokyo 113-8656 , Japan
| | - Seiichi Ohta
- Center for Disease Biology and Integrative Medicine , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku, Tokyo 113-8655 , Japan
| | - Masamichi Kamihira
- Department of Chemical Engineering , Kyushu University , 744 Motooka , Nishi-ku, Fukuoka 819-0395 , Japan
| | - Yasuyuki Sakai
- Department of Bioengineering , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku, Tokyo 113-8656 , Japan
| | - Taichi Ito
- Department of Bioengineering , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku, Tokyo 113-8656 , Japan
- Center for Disease Biology and Integrative Medicine , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku, Tokyo 113-8655 , Japan
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28
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Shi D, Wallyn J, Nguyen DV, Perton F, Felder-Flesch D, Bégin-Colin S, Maaloum M, Krafft MP. Microbubbles decorated with dendronized magnetic nanoparticles for biomedical imaging: effective stabilization via fluorous interactions. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2019; 10:2103-2115. [PMID: 31728258 PMCID: PMC6839566 DOI: 10.3762/bjnano.10.205] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 10/02/2019] [Indexed: 05/20/2023]
Abstract
Dendrons fitted with three oligo(ethylene glycol) (OEG) chains, one of which contains a fluorinated or hydrogenated end group and bears a bisphosphonate polar head (C n X2 n +1OEG8Den, X = F or H; n = 2 or 4), were synthesized and grafted on the surface of iron oxide nanoparticles (IONPs) for microbubble-mediated imaging and therapeutic purposes. The size and stability of the dendronized IONPs (IONP@C n X2 n +1OEG8Den) in aqueous dispersions were monitored by dynamic light scattering. The investigation of the spontaneous adsorption of IONP@C n X2 n +1OEG8Den at the interface between air or air saturated with perfluorohexane and an aqueous phase establishes that exposure to the fluorocarbon gas markedly increases the rate of adsorption of the dendronized IONPs to the gas/water interface and decreases the equilibrium interfacial tension. This suggests that fluorous interactions are at play between the supernatant fluorocarbon gas and the fluorinated end groups of the dendrons. Furthermore, small perfluorohexane-stabilized microbubbles (MBs) with a dipalmitoylphosphatidylcholine (DPPC) shell that incorporates IONP@C n X2 n +1OEG8Den (DPPC/Fe molar ratio 28:1) were prepared and subsequently characterized using both optical microscopy and an acoustical method of size determination. The dendrons fitted with fluorinated end groups lead to smaller and more stable MBs than those fitted with hydrogenated groups. The most effective result is already obtained with C2F5, for which MBs of ≈1.0 μm in radius reach a half-life of ≈6.0 h. An atomic force microscopy investigation of spin-coated mixed films of DPPC/IONP@C2X5OEG8Den combinations (molar ratio 28:1) shows that the IONPs grafted with the fluorinated dendrons are located within the phospholipid film, while those grafted with the hydrocarbon dendrons are located at the surface of the phospholipid film.
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Affiliation(s)
- Da Shi
- Institut Charles Sadron (CNRS), University of Strasbourg, 23 rue du Loess, 67034 Strasbourg, France
| | - Justine Wallyn
- Institut Charles Sadron (CNRS), University of Strasbourg, 23 rue du Loess, 67034 Strasbourg, France
| | - Dinh-Vu Nguyen
- Institut de Physique et de Chimie des Matériaux de Strasbourg (IPCMS), University of Strasbourg, 23 rue du Loess, 67034 Strasbourg, France
| | - Francis Perton
- Institut de Physique et de Chimie des Matériaux de Strasbourg (IPCMS), University of Strasbourg, 23 rue du Loess, 67034 Strasbourg, France
| | - Delphine Felder-Flesch
- Institut de Physique et de Chimie des Matériaux de Strasbourg (IPCMS), University of Strasbourg, 23 rue du Loess, 67034 Strasbourg, France
| | - Sylvie Bégin-Colin
- Institut de Physique et de Chimie des Matériaux de Strasbourg (IPCMS), University of Strasbourg, 23 rue du Loess, 67034 Strasbourg, France
| | - Mounir Maaloum
- Institut Charles Sadron (CNRS), University of Strasbourg, 23 rue du Loess, 67034 Strasbourg, France
| | - Marie Pierre Krafft
- Institut Charles Sadron (CNRS), University of Strasbourg, 23 rue du Loess, 67034 Strasbourg, France
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29
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Melich R, Valour JP, Urbaniak S, Padilla F, Charcosset C. Preparation and characterization of perfluorocarbon microbubbles using Shirasu Porous Glass (SPG) membranes. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2018.09.058] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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30
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Peng Y, Kheir JN, Polizzotti BD. Injectable Oxygen: Interfacing Materials Chemistry with Resuscitative Science. Chemistry 2018; 24:18820-18829. [DOI: 10.1002/chem.201802054] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 06/11/2018] [Indexed: 12/28/2022]
Affiliation(s)
- Yifeng Peng
- Translational Research Laboratory, Department of Cardiology; Boston Children's Hospital; Boston MA 02115 USA
- Department of Pediatrics; Harvard Medical School; Boston MA 02115 USA
| | - John N. Kheir
- Translational Research Laboratory, Department of Cardiology; Boston Children's Hospital; Boston MA 02115 USA
- Department of Pediatrics; Harvard Medical School; Boston MA 02115 USA
| | - Brian D. Polizzotti
- Translational Research Laboratory, Department of Cardiology; Boston Children's Hospital; Boston MA 02115 USA
- Department of Pediatrics; Harvard Medical School; Boston MA 02115 USA
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31
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Abdalkader R, Kawakami S, Unga J, Higuchi Y, Suzuki R, Maruyama K, Yamashita F, Hashida M. The development of mechanically formed stable nanobubbles intended for sonoporation-mediated gene transfection. Drug Deliv 2017; 24:320-327. [PMID: 28165819 PMCID: PMC8241156 DOI: 10.1080/10717544.2016.1250139] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Revised: 10/11/2016] [Accepted: 10/14/2016] [Indexed: 12/23/2022] Open
Abstract
In this study, stable nano-sized bubbles (nanobubbles [NBs]) were produced using the mechanical agitation method in the presence of perfluorocarbon gases. NBs made with perfluoropropane had a smaller size (around 400 nm) compared to that of those made with perfluorobutane or nitrogen gas. The lipid concentration in NBs affected both their initial size and post-formulation stability. NBs formed with a final lipid concentration of 0.5 mg/ml tended to be more stable, having a uniform size distribution for 24 h at room temperature and 50 h at 4 °C. In vitro gene expression revealed that NBs/pDNA in combination with ultrasound (US) irradiation had significantly higher transfection efficacy in colon C26 cells. Moreover, for in vivo gene transfection in mice left limb muscles, there was notable local transfection activity by NBs/pDNA when combined with US irradiation. In addition, the aged NBs kept at room temperature or 4 °C were still functional at enhancing gene transfection in mice. We succeeded in preparing stable NBs for efficient in vivo gene transfection, using the mechanical agitation method.
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Affiliation(s)
- Rodi Abdalkader
- Department of Drug Delivery Researches, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan
| | - Shigeru Kawakami
- Department of Pharmaceutical Informatics, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Johan Unga
- Department of Drug Delivery System, Faculty of Pharma-Sciences, Teikyo University, Tokyo, Japan, and
| | - Yuriko Higuchi
- Department of Drug Delivery Researches, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan
| | - Ryo Suzuki
- Department of Drug Delivery System, Faculty of Pharma-Sciences, Teikyo University, Tokyo, Japan, and
| | - Kazuo Maruyama
- Department of Drug Delivery System, Faculty of Pharma-Sciences, Teikyo University, Tokyo, Japan, and
| | - Fumiyoshi Yamashita
- Department of Drug Delivery Researches, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan
| | - Mitsuru Hashida
- Department of Drug Delivery Researches, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan
- Kyoto University Institute for Integrated Cell-Material Science (iCeMS), Kyoto, Japan
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32
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Segers T, Lohse D, Versluis M, Frinking P. Universal Equations for the Coalescence Probability and Long-Term Size Stability of Phospholipid-Coated Monodisperse Microbubbles Formed by Flow Focusing. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:10329-10339. [PMID: 28872315 DOI: 10.1021/acs.langmuir.7b02547] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Resonantly driven monodisperse phospholipid-coated microbubbles are expected to substantially increase the sensitivity and efficiency in contrast-enhanced ultrasound imaging and therapy. They can be produced in a microfluidic flow-focusing device, but questions remain as to the role of the device geometry, the liquid and gas flow, and the phospholipid formulation on bubble stability. Here, we develop a model based on simple continuum mechanics equations that reveals the scaling of the coalescence probability with the key physical parameters. It is used to characterize short-term coalescence behavior and long-term size stability as a function of flow-focusing geometry, bulk viscosity, lipid cosolvent mass fraction, lipid concentration, lipopolymer molecular weight, and lipopolymer molar fraction. All collected data collapse on two master curves given by universal equations for the coalescence probability and the long-term size stability. This work is therefore a route to a more fundamental understanding of the physicochemical monolayer properties of microfluidically formed bubbles and their coalescence behavior in a flow-focusing device.
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Affiliation(s)
- Tim Segers
- Bracco Suisse S.A., Route de la Galaise 31, 1228 Geneva, Switzerland
| | - Detlef Lohse
- Physics of Fluids group, MIRA Institute for Biomedical Technology and Technical Medicine, MESA+ Institute for Nanotechnology, University of Twente , Postbus 217, 7500 AE Enschede, The Netherlands
| | - Michel Versluis
- Physics of Fluids group, MIRA Institute for Biomedical Technology and Technical Medicine, MESA+ Institute for Nanotechnology, University of Twente , Postbus 217, 7500 AE Enschede, The Netherlands
| | - Peter Frinking
- Bracco Suisse S.A., Route de la Galaise 31, 1228 Geneva, Switzerland
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33
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Effect of PEGylation on performance of protein microbubbles and its comparison with lipid microbubbles. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 71:425-430. [DOI: 10.1016/j.msec.2016.10.021] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 09/07/2016] [Accepted: 10/16/2016] [Indexed: 11/23/2022]
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34
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Huang Y, Vezeridis AM, Wang J, Wang Z, Thompson M, Mattrey RF, Gianneschi NC. Polymer-Stabilized Perfluorobutane Nanodroplets for Ultrasound Imaging Agents. J Am Chem Soc 2017; 139:15-18. [PMID: 28032757 DOI: 10.1021/jacs.6b08800] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this paper, we describe a method for the stabilization of low-boiling point (low-bp) perfluorocarbons (PFCs) at physiological temperatures by an amphiphilic triblock copolymer which can emulsify PFCs and be cross-linked. After UV-induced thiol-ene cross-linking, the core of the PFC emulsion remains in liquid form even at temperatures exceeding their boiling points. Critically, the formulation permits vaporization at rarefactional pressures relevant for clinical ultrasound.
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Affiliation(s)
- Yuran Huang
- Materials Science & Engineering Program, ‡Department of Radiology, and §Department of Chemistry & Biochemistry, University of California-San Diego , La Jolla, California 92093, United States
| | - Alexander M Vezeridis
- Materials Science & Engineering Program, ‡Department of Radiology, and §Department of Chemistry & Biochemistry, University of California-San Diego , La Jolla, California 92093, United States
| | - James Wang
- Materials Science & Engineering Program, ‡Department of Radiology, and §Department of Chemistry & Biochemistry, University of California-San Diego , La Jolla, California 92093, United States
| | - Zhao Wang
- Materials Science & Engineering Program, ‡Department of Radiology, and §Department of Chemistry & Biochemistry, University of California-San Diego , La Jolla, California 92093, United States
| | - Matthew Thompson
- Materials Science & Engineering Program, ‡Department of Radiology, and §Department of Chemistry & Biochemistry, University of California-San Diego , La Jolla, California 92093, United States
| | - Robert F Mattrey
- Materials Science & Engineering Program, ‡Department of Radiology, and §Department of Chemistry & Biochemistry, University of California-San Diego , La Jolla, California 92093, United States
| | - Nathan C Gianneschi
- Materials Science & Engineering Program, ‡Department of Radiology, and §Department of Chemistry & Biochemistry, University of California-San Diego , La Jolla, California 92093, United States
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35
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Ando Y, Tabata H, Sanchez M, Cagna A, Koyama D, Krafft MP. Microbubbles with a Self-Assembled Poloxamer Shell and a Fluorocarbon Inner Gas. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:12461-12467. [PMID: 27409141 DOI: 10.1021/acs.langmuir.6b01883] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The numerous applications of microbubbles in food science and medicine call for a better understanding and control of the effects of the properties of their shells on their stability and ability to resonate at chosen frequencies when submitted to an ultrasound field. We have investigated both millimetric and micrometric bubbles stabilized by an amphiphilic block copolymer, Poloxamer 188 (e.g., Pluronic F-68). Although Pluronic F-68 is routinely being used as a dispersing and foaming agent to facilitate phospholipid-based microbubble preparation, it has never been studied as a shell component per se. First, we investigated the adsorption kinetics of Pluronic F-68 at the interface between water and air, or air saturated with vapors of perfluorohexane (F-hexane), using bubble profile tensiometry analysis. F-Hexane was found to strongly accelerate the adsorption of Pluronic F-68 (at low concentrations) and decrease the interfacial tension values at equilibrium (at all concentrations). We also found that relatively stable microbubbles could unexpectedly be prepared from Pluronic F-68 in the absence of any other surfactant, but only when F-hexane was present. These bubbles showed an only limited volume increase over ∼3 h, while a 10-fold increase in size occurred within 200 s in the absence of a fluorocarbon. Remarkably, their deflation rate decreased when the Pluronic F-68 concentration decreased, suggesting that bubbles with semidilute copolymer coverage are more stable than those more densely covered by copolymer brushes. Single-bubble experiments using laser Doppler vibratometry showed that, by contrast with other surfactant-coated microbubbles, the resonance radius of the Pluronic F-68-coated microbubbles was lower than that of naked microbubbles, meaning that they are less elastic. It was also found that the bubble's vibrational displacement amplitude decreased substantially when the microbubbles were covered with Pluronic F-68, an effect that was further amplified by F-hexane.
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Affiliation(s)
- Yu Ando
- Faculty of Life and Medical Sciences, Doshisha University , Kyoto 610-0321, Japan
- Institut Charles Sadron (CNRS), University of Strasbourg , 23 rue du Loess, 67034 Strasbourg, France
| | - Hiraku Tabata
- Faculty of Life and Medical Sciences, Doshisha University , Kyoto 610-0321, Japan
- Institut Charles Sadron (CNRS), University of Strasbourg , 23 rue du Loess, 67034 Strasbourg, France
| | | | - Alain Cagna
- TECLIS Instruments , Tassin, 69160 Lyon Métropole, France
| | - Daisuke Koyama
- Faculty of Life and Medical Sciences, Doshisha University , Kyoto 610-0321, Japan
| | - Marie Pierre Krafft
- Institut Charles Sadron (CNRS), University of Strasbourg , 23 rue du Loess, 67034 Strasbourg, France
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36
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Abou-Saleh RH, Peyman SA, Johnson BRG, Marston G, Ingram N, Bushby R, Coletta PL, Markham AF, Evans SD. The influence of intercalating perfluorohexane into lipid shells on nano and microbubble stability. SOFT MATTER 2016; 12:7223-30. [PMID: 27501364 DOI: 10.1039/c6sm00956e] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Microbubbles are potential diagnostic and therapeutic agents. In vivo stability is important as the bubbles are required to survive multiple passages through the heart and lungs to allow targeting and delivery. Here we have systematically varied key parameters affecting microbubble lifetime to significantly increase in vivo stability. Whilst shell and core composition are found to have an important role in improving microbubble stability, we show that inclusion of small quantities of C6F14 in the microbubble bolus significantly improves microbubble lifetime. Our results indicate that C6F14 inserts into the lipid shell, decreasing surface tension to 19 mN m(-1), and increasing shell resistance, in addition to saturating the surrounding medium. Surface area isotherms suggest that C6F14 incorporates into the acyl chain region of the lipid at a high molar ratio, indicating ∼2 perfluorocarbon molecules per 5 lipid molecules. The resulting microbubble boluses exhibit a higher in vivo image intensity compared to commercial compositions, as well as longer lifetimes.
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Affiliation(s)
- Radwa H Abou-Saleh
- Molecular and Nanoscale Physics Group, School of Physics and Astronomy, University of Leeds, LS2 9JT, UK.
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37
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Chen G, Yang L, Zhong L, Kutty S, Wang Y, Cui K, Xiu J, Cao S, Huang Q, Liao W, Liao Y, Wu J, Zhang W, Bin J. Delivery of Hydrogen Sulfide by Ultrasound Targeted Microbubble Destruction Attenuates Myocardial Ischemia-reperfusion Injury. Sci Rep 2016; 6:30643. [PMID: 27469291 PMCID: PMC4965795 DOI: 10.1038/srep30643] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Accepted: 07/07/2016] [Indexed: 11/21/2022] Open
Abstract
Hydrogen sulfide (H2S) is an attractive agent for myocardial ischemia-reperfusion injury, however, systemic delivery of H2S may cause unwanted side effects. Ultrasound targeted microbubble destruction has become a promising tool for organ specific delivery of bioactive substance. We hypothesized that delivery of H2S by ultrasound targeted microbubble destruction attenuates myocardial ischemia-reperfusion injury and could avoid unwanted side effects. We prepared microbubbles carrying hydrogen sulfide (hs-MB) with different H2S/C3F8 ratios (4/0, 3/1, 2/2, 1/3, 0/4) and determined the optimal ratio. Release of H2S triggered by ultrasound was investigated. The cardioprotective effect of ultrasound targeted hs-MB destruction was investigated in a rodent model of myocardial ischemia-reperfusion injury. The H2S/C3F8 ratio of 2/2 was found to be an optimal ratio to prepare stable hs-MB with higher H2S loading capability. Ultrasound targeted hs-MB destruction triggered H2S release and increased the concentration of H2S in the myocardium and lung. Ultrasound targeted hs-MB destruction limited myocardial infarct size, preserved left ventricular function and had no influence on haemodynamics and respiratory. This cardioprotective effect was associated with alleviation of apoptosis and oxidative stress. Delivery of H2S to the myocardium by ultrasound targeted hs-MB destruction attenuates myocardial ischemia-reperfusion injury and may avoid unwanted side effects.
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Affiliation(s)
- Gangbin Chen
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, P.R. China
| | - Li Yang
- Department of Pharmacy, Nanfang Hospital, Southern Medical University, Guangzhou, P.R. China
| | - Lintao Zhong
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, P.R. China
| | - Shelby Kutty
- Division of Cardiology, University of Nebraska College of Medicine, Children's Hospital &Medical Center, Omaha, Nebraska, USA
| | - Yuegang Wang
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, P.R. China
| | - Kai Cui
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, P.R. China
| | - Jiancheng Xiu
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, P.R. China
| | - Shiping Cao
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, P.R. China
| | - Qiaobing Huang
- Department of Pathophysiology, Southern Medical University, Guangzhou, P.R. China
| | - Wangjun Liao
- Department of Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, P.R. China
| | - Yulin Liao
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, P.R. China
| | - Juefei Wu
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, P.R. China
| | - Wenzhu Zhang
- Department of Cardiology, Panyu Central Hospital, Guangzhou, P.R. China
| | - Jianping Bin
- State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, P.R. China
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Zhang C, Wang Z, Wang C, Li X, Liu J, Xu M, Xu S, Xie X, Jiang Q, Wang W, Cao Z. Highly Uniform Perfluoropropane-Loaded Cerasomal Microbubbles As a Novel Ultrasound Contrast Agent. ACS APPLIED MATERIALS & INTERFACES 2016; 8:15024-15032. [PMID: 26114237 DOI: 10.1021/acsami.5b03668] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Microbubbles are widely used as ultrasound contrast agents owing to their excellent echoing characteristics under ultrasound radiation. However, their short sonographic duration and wide size distribution still hinder their application. Herein, we present a hard-template approach to produce perfluoropropane-loaded cerasomal microbubbles (PLCMs) with uniform size and long sonographic duration. The preparation of PLCMs includes deposition of Si-lipids onto functionalized CaCO3 microspheres, removal of their CaCO3 cores and mild infusion of perfluoropropane. In vitro and in vivo experiments showed that PLCMs had excellent echoing characteristics under different ultrasound conditions. More importantly, PLCMs could be imaged for much longer than SonoVue (commercially used microbubbles) under the same ultrasound parameters and concentrations. Our results demonstrated that PLCMs have great potential for use as a novel contrast agent in ultrasound imaging.
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Affiliation(s)
- Chunyang Zhang
- Department of Biomedical Engineering, School of Engineering, Sun Yat-sen University , Guangzhou, Guangdong 510006, China
| | - Zhu Wang
- Department of Medical Ultrasonics, Institute of Diagnostic and Interventional Ultrasound, The First Affiliated Hospital of Sun Yat-sen University , Guangzhou, Guangdong 510080, China
| | - Chunan Wang
- Department of Biomedical Engineering, School of Engineering, Sun Yat-sen University , Guangzhou, Guangdong 510006, China
| | - Xiongjun Li
- Department of Biomedical Engineering, School of Engineering, Sun Yat-sen University , Guangzhou, Guangdong 510006, China
| | - Jie Liu
- Department of Biomedical Engineering, School of Engineering, Sun Yat-sen University , Guangzhou, Guangdong 510006, China
| | - Ming Xu
- Department of Medical Ultrasonics, Institute of Diagnostic and Interventional Ultrasound, The First Affiliated Hospital of Sun Yat-sen University , Guangzhou, Guangdong 510080, China
| | - Shuyu Xu
- Department of Biomedical Engineering, School of Engineering, Sun Yat-sen University , Guangzhou, Guangdong 510006, China
| | - Xiaoyan Xie
- Department of Medical Ultrasonics, Institute of Diagnostic and Interventional Ultrasound, The First Affiliated Hospital of Sun Yat-sen University , Guangzhou, Guangdong 510080, China
| | - Qing Jiang
- Department of Biomedical Engineering, School of Engineering, Sun Yat-sen University , Guangzhou, Guangdong 510006, China
| | - Wei Wang
- Department of Medical Ultrasonics, Institute of Diagnostic and Interventional Ultrasound, The First Affiliated Hospital of Sun Yat-sen University , Guangzhou, Guangdong 510080, China
| | - Zhong Cao
- Department of Biomedical Engineering, School of Engineering, Sun Yat-sen University , Guangzhou, Guangdong 510006, China
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Kovalenko A, Jouhannaud J, Polavarapu P, Krafft MP, Waton G, Pourroy G. Incorporation of negatively charged iron oxide nanoparticles in the shell of anionic surfactant-stabilized microbubbles: The effect of NaCl concentration. J Colloid Interface Sci 2016; 472:180-6. [DOI: 10.1016/j.jcis.2016.02.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Revised: 02/03/2016] [Accepted: 02/04/2016] [Indexed: 01/12/2023]
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Ma J, Pourroy G, Krafft MP. Stable Small Composite Microbubbles Decorated with Magnetite Nanoparticles - A Synergistic Effect between Surfactant Molecules and Nanoparticles. J Oleo Sci 2016; 65:369-76. [PMID: 27087000 DOI: 10.5650/jos.ess16031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Three approaches to preparing iron oxide nanoparticle-decorated microbubbles (NP-decoMBs) have been investigated. The size and stability characteristics of these microbubbles (MBs) were investigated by optical microscopy, laser light scattering and an acoustical method, and compared with those of non-decorated MBs. First, magnetite nanoparticles (Fe3O4NPs) grafted with dimyristoylphosphatidylcholine (DMPC) were synthesized and used to prepare MBs by brief sonication under an atmosphere of air saturated with perfluorohexane. These MBs had a rather large mean radius (r ~ 12 µm), and a moderate volume of encapsulated gas. Remarkably, a second approach that consisted of dispersing unbound DMPC molecules in the aqueous phase along with DMPC-grafted Fe3O4NPs prior to sonication was found to drastically change the situation, allowing the obtaining of monomodal populations of much smaller (r ~ 0.6 µm) NP-decoMBs. The latter were echogenic and stable for at least 10 days at room temperature, without significant variation of their size characteristics. In a third approach, NP-decoMBs were directly prepared from dispersions of naked Fe3O4NPs in the presence of DMPC. The resulting NP-decoMBs suspensions consisted of broadly distributed bubble populations mostly containing two populations (with r ~ 5 and ~ 15 µm). Control microbubbles made of DMPC only were small (r ~ 1.3 µm), although not as small as those formed from DMPC-grafted Fe3O4NPs in the presence of free DMPC, and were less stable, with a room temperature half-life of only ~1 day. These observations imply that there is a synergy between the Fe3O4NPs and the DMPC molecules in the air/water interfacial film stabilization process.
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Affiliation(s)
- Jun Ma
- Institut Charles Sadron (ICS, CNRS, UPR 22). Université de Strasbourg
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Segers T, de Rond L, de Jong N, Borden M, Versluis M. Stability of Monodisperse Phospholipid-Coated Microbubbles Formed by Flow-Focusing at High Production Rates. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:3937-3944. [PMID: 27006083 DOI: 10.1021/acs.langmuir.6b00616] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Monodisperse microbubble ultrasound contrast agents may dramatically increase the sensitivity and efficiency in ultrasound imaging and therapy. They can be produced directly in a microfluidic flow-focusing device, but questions remain as to the interfacial chemistry, such as the formation and development of the phospholipid monolayer coating over time. Here, we demonstrate the synthesis of monodisperse bubbles with radii of 2-10 μm at production rates ranging from 10(4) to 10(6) bubbles/s. All bubbles were found to dissolve to a stable final radius 2.55 times smaller than their initial radius, independent of the nozzle size and shear rate, indicating that the monolayer self-assembles prior to leaving the nozzle. The corresponding decrease in surface area by a factor 6.6 reveals that lipid molecules are adsorbed to the gas-liquid interface in the disordered expanded state, and they become mechanically compressed by Laplace pressure-driven bubble dissolution to a more ordered condensed state with near zero surface tension. Acoustic characterization of the stabilized microbubbles revealed that their shell stiffness gradually increased from 0.8 to 2.5 N/m with increasing number of insonations through the selective loss of the more soluble lipopolymer molecules. This work therefore demonstrates high-throughput production of clinically relevant monodisperse contrast microbubbles with excellent control over phospholipid monolayer elasticity and microbubble resonance.
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Affiliation(s)
- Tim Segers
- Physics of Fluids Group, MESA+ Institute for Nanotechnology, and MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente , P. O. Box 217, 7500 AE Enschede, The Netherlands
| | - Leonie de Rond
- Physics of Fluids Group, MESA+ Institute for Nanotechnology, and MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente , P. O. Box 217, 7500 AE Enschede, The Netherlands
| | - Nico de Jong
- Department of Biomedical Engineering, Thoraxcenter, Erasmus MC , Wyternaweg 80 EE 2302, 3015 CN Rotterdam, The Netherlands
| | - Mark Borden
- Department of Mechanical Engineering, University of Colorado , 1111 Engineering Drive, Boulder, Colorado 80309-0427, United States
| | - Michel Versluis
- Physics of Fluids Group, MESA+ Institute for Nanotechnology, and MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente , P. O. Box 217, 7500 AE Enschede, The Netherlands
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WITHDRAWN: Polymer assembly: Promising carriers as co-delivery systems for cancer therapy. Prog Polym Sci 2015. [DOI: 10.1016/j.progpolymsci.2015.11.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Krafft MP. Fluorine in medical microbubbles – Methodologies implemented for engineering and investigating fluorocarbon-based microbubbles. J Fluor Chem 2015. [DOI: 10.1016/j.jfluchem.2015.02.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Yang G, O'Duill M, Gouverneur V, Krafft MP. Recruitment and Immobilization of a Fluorinated Biomarker Across an Interfacial Phospholipid Film using a Fluorocarbon Gas. Angew Chem Int Ed Engl 2015; 54:8402-6. [PMID: 26068966 DOI: 10.1002/anie.201502677] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Revised: 04/21/2015] [Indexed: 01/02/2023]
Abstract
Perfluorohexane gas when introduced in the air atmosphere above a film of phospholipid self-supported on an aqueous solution of C2F5-labeled compounds causes the recruitment and immobilization of the latter in the interfacial film. When the phospholipid forms a liquid-condensed Gibbs monolayer, which is the case for dipalmitoylphosphatidylcholine (DPPC), the C2F5-labeled molecule remains trapped in the monolayer after removal of F-hexane. Investigations involve bubble profile analysis tensiometry (Gibbs films), Langmuir monolayers and microbubble experiments. The new phenomenon was utilized to incorporate a hypoxia biomarker, a C2F5-labeled nitrosoimidazole (EF5), in microbubble shells. This finding opens perspectives in the delivery of fluorinated therapeutic molecules and biomarkers.
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Affiliation(s)
- Guang Yang
- Institut Charles Sadron (CNRS), University of Strasbourg, 23 rue du Loess, 67034 Strasbourg (France)
| | - Miriam O'Duill
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA (UK)
| | - Véronique Gouverneur
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA (UK)
| | - Marie Pierre Krafft
- Institut Charles Sadron (CNRS), University of Strasbourg, 23 rue du Loess, 67034 Strasbourg (France).
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Yang G, O'Duill M, Gouverneur V, Krafft MP. Recruitment and Immobilization of a Fluorinated Biomarker Across an Interfacial Phospholipid Film using a Fluorocarbon Gas. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201502677] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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47
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Perfluoroalkylated poly(oxyethylene) thiols: Synthesis, adsorption dynamics and surface activity at the air/water interface, and bubble stabilization behaviour. J Fluor Chem 2015. [DOI: 10.1016/j.jfluchem.2014.10.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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48
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Krafft MP. Perfluoroalkyl chains as tools for film surface nano-patterning and soft microbubble engineering and decoration. J Taiwan Inst Chem Eng 2014. [DOI: 10.1016/j.jtice.2014.06.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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49
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Thomson LM, Polizzotti BD, McGowan FX, Kheir JN. Manufacture of concentrated, lipid-based oxygen microbubble emulsions by high shear homogenization and serial concentration. J Vis Exp 2014. [PMID: 24894333 DOI: 10.3791/51467] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Gas-filled microbubbles have been developed as ultrasound contrast and drug delivery agents. Microbubbles can be produced by processing surfactants using sonication, mechanical agitation, microfluidic devices, or homogenization. Recently, lipid-based oxygen microbubbles (LOMs) have been designed to deliver oxygen intravenously during medical emergencies, reversing life-threatening hypoxemia, and preventing subsequent organ injury, cardiac arrest, and death. We present methods for scaled-up production of highly oxygenated microbubbles using a closed-loop high-shear homogenizer. The process can produce 2 L of concentrated LOMs (90% by volume) in 90 min. Resulting bubbles have a mean diameter of ~2 μm, and a rheologic profile consistent with that of blood when diluted to 60 volume %. This technique produces LOMs in high capacity and with high oxygen purity, suggesting that this technique may be useful for translational research labs.
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Affiliation(s)
- Lindsay M Thomson
- Department of Cardiology, Boston Children's Hospital, Harvard Medical School
| | - Brian D Polizzotti
- Department of Cardiology, Boston Children's Hospital, Harvard Medical School
| | - Frances X McGowan
- Department of Anesthesiology and Critical Care, Children's Hospital of Philadelphia, University of Pennsylvania
| | - John N Kheir
- Department of Cardiology, Boston Children's Hospital, Harvard Medical School;
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Liu B, Zhou X, Yang F, Shen H, Wang S, Zhang B, Zhi G, Wu D. Fabrication of uniform sized polylactone microcapsules by premix membrane emulsification for ultrasound imaging. Polym Chem 2014. [DOI: 10.1039/c3py01144e] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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