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Ahn S, Siontas O, Koester J, Krol J, Fauser S, Müller DJ. Magnetically Guided Adeno-Associated Virus Delivery for the Spatially Targeted Transduction of Retina in Eyes. Adv Healthc Mater 2024:e2401577. [PMID: 38848510 DOI: 10.1002/adhm.202401577] [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: 04/29/2024] [Indexed: 06/09/2024]
Abstract
Adeno-associated viruses (AAVs) are intensively explored for gene therapies in general and have found promising applications for treating retina diseases. However, controlling the specificity (tropism) and delivery of AAVs to selected layers, cell types, and areas of the retina is a major challenge to further develop retinal gene therapies. Magnetic nanoparticles (MNPs) provide effective delivery platforms to magnetically guide therapeutics to target cells. Yet, how MNPs can deliver AAVs to transfect particular retina layers and cells remains elusive. Here, it is demonstrated that MNPs can be used to transport different AAVs through the retina and to modulate the selective transduction of specific retinal layers or photoreceptor cells in ex vivo porcine explants and whole eyes. Thereby, transduction is triggered by bringing the viruses in close proximity to the target cell layer and by controlling their interaction time. It is shown that this magnetically guided approach to transport AAVs to selected areas and layers of the retina does not require the cell-specific optimization of the AAV tropism. It is anticipated that the new approach to control the delivery of AAVs and to selectively transduce cellular systems can be applied to many other tissues or organs to selectively deliver genes of interest.
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Affiliation(s)
- Seungkuk Ahn
- Eidgenössische Technische Hochschule (ETH) Zürich, Department of Biosystems Science and Engineering, Basel, 4056, Switzerland
| | - Oliver Siontas
- Eidgenössische Technische Hochschule (ETH) Zürich, Department of Biosystems Science and Engineering, Basel, 4056, Switzerland
| | - Janis Koester
- F. Hoffmann-La Roche Ltd, Roche Pharma Research and Early Development, Department of Ophthalmology, Basel, 4070, Switzerland
| | - Jacek Krol
- F. Hoffmann-La Roche Ltd, Roche Pharma Research and Early Development, Department of Ophthalmology, Basel, 4070, Switzerland
| | - Sascha Fauser
- F. Hoffmann-La Roche Ltd, Roche Pharma Research and Early Development, Department of Ophthalmology, Basel, 4070, Switzerland
| | - Daniel J Müller
- Eidgenössische Technische Hochschule (ETH) Zürich, Department of Biosystems Science and Engineering, Basel, 4056, Switzerland
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2
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Kono Y. Preparation of Magnetized Mesenchymal Stem Cells Using Magnetic Liposomes to Enhance Their Retention in Targeted Tissue —Evaluation of Retention and Anti-inflammatory Efficiency in Skeletal Muscle—. YAKUGAKU ZASSHI 2022; 142:1145-1151. [DOI: 10.1248/yakushi.22-00132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yusuke Kono
- Ritsumeikan-Global Innovation Research Organization, Ritsumeikan University
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3
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Magnetofection In Vivo by Nanomagnetic Carriers Systemically Administered into the Bloodstream. Pharmaceutics 2021; 13:pharmaceutics13111927. [PMID: 34834342 PMCID: PMC8619128 DOI: 10.3390/pharmaceutics13111927] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 11/09/2021] [Accepted: 11/10/2021] [Indexed: 12/11/2022] Open
Abstract
Nanoparticle-based technologies are rapidly expanding into many areas of biomedicine and molecular science. The unique ability of magnetic nanoparticles to respond to the magnetic field makes them especially attractive for a number of in vivo applications including magnetofection. The magnetofection principle consists of the accumulation and retention of magnetic nanoparticles carrying nucleic acids in the area of magnetic field application. The method is highly promising as a clinically efficient tool for gene delivery in vivo. However, the data on in vivo magnetofection are often only descriptive or poorly studied, insufficiently systematized, and sometimes even contradictory. Therefore, the aim of the review was to systematize and analyze the data that influence the in vivo magnetofection processes after the systemic injection of magnetic nanostructures. The main emphasis is placed on the structure and coating of the nanomagnetic vectors. The present problems and future trends of the method development are also considered.
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4
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Directed manipulation of membrane proteins by fluorescent magnetic nanoparticles. Nat Commun 2020; 11:4259. [PMID: 32848156 PMCID: PMC7450064 DOI: 10.1038/s41467-020-18087-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Accepted: 08/04/2020] [Indexed: 01/19/2023] Open
Abstract
The plasma membrane is the interface through which cells interact with their environment. Membrane proteins are embedded in the lipid bilayer of the plasma membrane and their function in this context is often linked to their specific location and dynamics within the membrane. However, few methods are available to manipulate membrane protein location at the single-molecule level. Here, we use fluorescent magnetic nanoparticles (FMNPs) to track membrane molecules and to control their movement. FMNPs allow single-particle tracking (SPT) at 10 nm and 5 ms spatiotemporal resolution, and using a magnetic needle, we pull membrane components laterally with femtonewton-range forces. In this way, we drag membrane proteins over the surface of living cells. Doing so, we detect barriers which we could localize to the submembrane actin cytoskeleton by super-resolution microscopy. We present here a versatile approach to probe membrane processes in live cells via the magnetic control of membrane protein motion. Membrane proteins are embedded in the lipid bilayer of the plasma membrane and their function in this context is often linked to their specific location and dynamics within the membrane. Here authors report the use of fluorescent magnetic nanoparticles to track membrane molecules and to manipulate their movement and pull membrane components laterally through the membrane with femtonewton-range forces.
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5
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Ni R, Feng R, Chau Y. Synthetic Approaches for Nucleic Acid Delivery: Choosing the Right Carriers. Life (Basel) 2019; 9:E59. [PMID: 31324016 PMCID: PMC6789897 DOI: 10.3390/life9030059] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 07/02/2019] [Accepted: 07/03/2019] [Indexed: 12/12/2022] Open
Abstract
The discovery of the genetic roots of various human diseases has motivated the exploration of different exogenous nucleic acids as therapeutic agents to treat these genetic disorders (inherited or acquired). However, the physicochemical properties of nucleic acids render them liable to degradation and also restrict their cellular entrance and gene translation/inhibition at the correct cellular location. Therefore, gene condensation/protection and guided intracellular trafficking are necessary for exogenous nucleic acids to function inside cells. Diversified cationic formulation materials, including natural and synthetic lipids, polymers, and proteins/peptides, have been developed to facilitate the intracellular transportation of exogenous nucleic acids. The chemical properties of different formulation materials determine their special features for nucleic acid delivery, so understanding the property-function correlation of the formulation materials will inspire the development of next-generation gene delivery carriers. Therefore, in this review, we focus on the chemical properties of different types of formulation materials and discuss how these formulation materials function as protectors and cellular pathfinders for nucleic acids, bringing them to their destination by overcoming different cellular barriers.
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Affiliation(s)
- Rong Ni
- Department of Chemical and Biological Engineering, the Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 999077, China
- Institute for Advanced Study, the Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 999077, China
| | - Ruilu Feng
- Department of Chemical and Biological Engineering, the Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 999077, China
| | - Ying Chau
- Department of Chemical and Biological Engineering, the Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 999077, China.
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6
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Babincová M, Durdík Š, Babincová N, Sourivong P, Babinec P. Application of cationized magnetoferritin for magnetic field-assisted delivery of short interfering RNA in vitro. Lasers Med Sci 2018; 33:1807-1812. [PMID: 29846831 DOI: 10.1007/s10103-018-2547-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Accepted: 05/21/2018] [Indexed: 01/18/2023]
Abstract
Cationized magnetoferritin is used for development of a simple, efficient, and fast delivery of short interference RNA into cells using combination of magnetophoresis for pre-concentration of siRNA-magnetoferritin complex on the surface of plated cells with subsequent application of nanosecond laser pulses producing stress waves in transfection chamber, which permeabilize cell membrane for the facilitated delivery of siRNA into the cell interior. As has been quantified using siRNA inducing cell death assay, by combination of these two physical factors we have obtained high efficiency for tested three different human carcinoma cells. Proposed method of gene silencing based on cationized magnetoferritin is a versatile and easily accessible platform with many possible applications in gene therapy.
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Affiliation(s)
- Melánia Babincová
- Department of Nuclear Physics and Biophysics, Faculty of Mathematics, Physics and Informatics, Comenius University, Mlynská dolina F1, 842 48, Bratislava, Slovakia
| | - Štefan Durdík
- Department of Surgical Oncology, Saint Elisabeth Cancer Institute and Faculty of Medicine, Comenius University Bratislava, Heydukova 10, Bratislava, Slovakia
| | - Natália Babincová
- Department of Dermatovenerology, Faculty of Medicine, Mickiewiczova 13, 813 69, Bratislava, Slovakia
| | - Paul Sourivong
- Oklahoma Cancer Specialists and Research Institute, 12697 East 51st Street South, Tulsa, OK, 74146, USA
| | - Peter Babinec
- Department of Nuclear Physics and Biophysics, Faculty of Mathematics, Physics and Informatics, Comenius University, Mlynská dolina F1, 842 48, Bratislava, Slovakia.
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7
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Sum CH, Shortall SM, Nicastro JA, Slavcev R. Specific Systems for Imaging. EXPERIENTIA SUPPLEMENTUM (2012) 2018; 110:69-97. [PMID: 30536227 DOI: 10.1007/978-3-319-78259-1_3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Microscopy allows for the characterization of small objects invisible to the naked eye, a technique that, since its conception, has played a key role in the development across nearly every field of science and technology. Given the nanometer size of the materials explored in the field of nanotechnology, the contributions of modern microscopes that can visualize these materials are indispensable, and the ever-improving technology is paramount to the future success of the field. This chapter will focus on four fundamental areas of microscopy used in the field of nanotechnology including fluorescence microscopy (Sect. 3.1), particle tracking and photoactivated localization microscopy (Sect. 3.2), quantum dots and fluorescence resonance energy transfer (Sect. 3.3), and cellular MRI and PET labeling (Sect. 3.4). The functionality, as well as the current and recommended usage of each given imaging system, will be discussed.
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8
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Zhu D, Yan H, Zhou Z, Tang J, Liu X, Hartmann R, Parak WJ, Feliu N, Shen Y. Detailed investigation on how the protein corona modulates the physicochemical properties and gene delivery of polyethylenimine (PEI) polyplexes. Biomater Sci 2018; 6:1800-1817. [DOI: 10.1039/c8bm00128f] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Given the various cationic polymers developed as non-viral gene delivery vectors, polyethylenimine (PEI) has been/is frequently used in in vitro transfection.
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Affiliation(s)
- Dingcheng Zhu
- Center for Bionanoengineering and Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- China
- Fachbereich Physik
| | - Huijie Yan
- Center for Bionanoengineering and Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- China
- Fachbereich Physik
| | - Zhuxian Zhou
- Center for Bionanoengineering and Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- China
| | - Jianbin Tang
- Center for Bionanoengineering and Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- China
| | - Xiangrui Liu
- Center for Bionanoengineering and Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- China
| | | | - Wolfgang J. Parak
- Fachbereich Physik
- Philipps Universität Marburg
- Germany
- Fachbereich Physik und Chemie and CHyN
- Universität Hamburg
| | - Neus Feliu
- Fachbereich Physik
- Philipps Universität Marburg
- Germany
- Fachbereich Physik und Chemie and CHyN
- Universität Hamburg
| | - Youqing Shen
- Center for Bionanoengineering and Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- China
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Abstract
Although viral vectors comprise the majority of gene delivery vectors, their various safety, production, and other practical concerns have left a research gap to be addressed. The non-viral vector space encompasses a growing variety of physical and chemical methods capable of gene delivery into the nuclei of target cells. Major physical methods described in this chapter are microinjection, electroporation, and ballistic injection, magnetofection, sonoporation, optical transfection, and localized hyperthermia. Major chemical methods described in this chapter are lipofection, polyfection, gold complexation, and carbon-based methods. Combination approaches to improve transfection efficiency or reduce immunological response have shown great promise in expanding the scope of non-viral gene delivery.
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Affiliation(s)
- Chi Hong Sum
- University of Waterloo, School of Pharmacy, Waterloo, ON, Canada
| | | | - Shirley Wong
- University of Waterloo, School of Pharmacy, Waterloo, ON, Canada
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10
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Kono Y, Jinzai H, Kotera Y, Fujita T. Influence of Physicochemical Properties and PEG Modification of Magnetic Liposomes on Their Interaction with Intestinal Epithelial Caco-2 Cells. Biol Pharm Bull 2017; 40:2166-2174. [PMID: 28966298 DOI: 10.1248/bpb.b17-00563] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The present study aimed to investigate the effect of particle size (100, 500 nm), surface charge (cationic, neutral and anionic) and polyethylene glycol (PEG) modification of magnetic liposomes on their interaction with the human intestinal epithelial cell line, Caco-2. The cellular associated amount of all the magnetic liposomes was significantly increased by the presence of a magnetic field. The highest association and internalization into Caco-2 cells was observed with magnetic cationic liposomes. Moreover, small magnetic liposomes were more efficiently associated and taken up into the cells, than large ones. In contrast, PEG modification significantly attenuated the enhancing effect of the magnetic field on the cellular association of magnetic liposomes. We also found that magnetic cationic liposomes had the highest retention properties to Caco-2 cells. Moreover, the retention of large magnetic liposomes to the cells was much longer than that of small ones. In addition, magnetic cationic and neutral liposomes had relatively high stability in Caco-2 cells, whereas magnetic anionic liposomes rapidly degraded. These results indicate that the physicochemical properties and PEG modification of magnetic liposomes greatly influences their intestinal epithelial transport.
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Affiliation(s)
- Yusuke Kono
- Laboratory of Molecular Pharmacokinetics, College of Pharmaceutical Sciences, Ritsumeikan University.,Ritsumeikan-Global Innovation Research Organization, Ritsumeikan University
| | - Hitomi Jinzai
- Laboratory of Molecular Pharmacokinetics, College of Pharmaceutical Sciences, Ritsumeikan University
| | - Yota Kotera
- Laboratory of Molecular Pharmacokinetics, College of Pharmaceutical Sciences, Ritsumeikan University
| | - Takuya Fujita
- Laboratory of Molecular Pharmacokinetics, College of Pharmaceutical Sciences, Ritsumeikan University.,Ritsumeikan-Global Innovation Research Organization, Ritsumeikan University.,Research Center for Drug Discovery and Development, Ritsumeikan University
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11
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Design of magnetic gene complexes as effective and serum resistant gene delivery systems for mesenchymal stem cells. Int J Pharm 2017; 520:1-13. [DOI: 10.1016/j.ijpharm.2017.01.041] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2016] [Revised: 01/12/2017] [Accepted: 01/20/2017] [Indexed: 01/04/2023]
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12
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Digiacomo L, Digman MA, Gratton E, Caracciolo G. Development of an image Mean Square Displacement (iMSD)-based method as a novel approach to study the intracellular trafficking of nanoparticles. Acta Biomater 2016; 42:189-198. [PMID: 27449340 PMCID: PMC5483853 DOI: 10.1016/j.actbio.2016.07.031] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Revised: 07/01/2016] [Accepted: 07/15/2016] [Indexed: 12/15/2022]
Abstract
UNLABELLED Fluorescence microscopy and spectroscopy techniques are commonly used to investigate complex and interacting biological systems (e.g. proteins and nanoparticles in living cells), since these techniques can explore intracellular dynamics with high time resolution at the nanoscale. Here we extended one of the Image Correlation Spectroscopy (ICS) methods, i.e. the image Mean Square Displacement, in order to study 2-dimensional diffusive and flow motion in confined systems, whose driving speed is uniformly distributed in a variable angular range. Although these conditions are not deeply investigated in the current literature, they can be commonly found in the intracellular trafficking of nanocarriers, which diffuse in the cytoplasm and/or may move along the cytoskeleton in different directions. The proposed approach could reveal the underlying system's symmetry using methods derived from fluorescence correlation concepts and could recover dynamic and geometric features which are commonly done by single particle analyses. Furthermore, it improves the characterization of low-speed flow motions, when compared to SpatioTemporal Image Correlation Spectroscopy (STICS). Although we present a specific example (lipoplexes in living cells), the emphasis is in the discussion of the method, its basic assumptions and its validation on numeric simulations. STATEMENT OF SIGNIFICANCE Recent advances in nanoparticle-based drug and gene delivery systems have pointed out the interactions at cellular and subcellular levels as key-factors for the efficiency of the adopted biomaterials. Such biochemical and biophysical interactions drive and affect the intracellular dynamics, that is commonly characterized by means of fluorescence microscopy and spectroscopy techniques. Here we present a novel Image Correlation Spectroscopy (ICS) method as a promising tool to capture the intracellular behavior of nanoparticles with high resolution and low background's sensitivity. This study overcomes some of the approximations adopted so far, by decoupling the flow terms of the investigated dynamics and thus recovering ensemble's information from specific single particle behaviors. Finally, relevant implications for nanoparticle-based drug delivery are shown.
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Affiliation(s)
- Luca Digiacomo
- Department of Molecular Medicine, Sapienza University of Rome, Viale Regina Elena 291, 00161 Rome, Italy; Department of Bioscience and Biotechnology, University of Camerino, Via Gentile III da Varano, 62032 Camerino, (MC), Italy
| | - Michelle A Digman
- Laboratory for Fluorescence Dynamics, Biomedical Engineering Department, University of California at Irvine, Irvine, CA 92697, USA
| | - Enrico Gratton
- Laboratory for Fluorescence Dynamics, Biomedical Engineering Department, University of California at Irvine, Irvine, CA 92697, USA
| | - Giulio Caracciolo
- Department of Molecular Medicine, Sapienza University of Rome, Viale Regina Elena 291, 00161 Rome, Italy.
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13
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Petrakova V, Benson V, Buncek M, Fiserova A, Ledvina M, Stursa J, Cigler P, Nesladek M. Imaging of transfection and intracellular release of intact, non-labeled DNA using fluorescent nanodiamonds. NANOSCALE 2016; 8:12002-12. [PMID: 27240633 DOI: 10.1039/c6nr00610h] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Efficient delivery of stabilized nucleic acids (NAs) into cells and release of the NA payload are crucial points in the transfection process. Here we report on the fabrication of a nanoscopic cellular delivery carrier that is additionally combined with a label-free intracellular sensor device, based on biocompatible fluorescent nanodiamond particles. The sensing function is engineered into nanodiamonds by using nitrogen-vacancy color centers, providing stable non-blinking luminescence. The device is used for monitoring NA transfection and the payload release in cells. The unpacking of NAs from a poly(ethyleneimine)-terminated nanodiamond surface is monitored using the color shift of nitrogen-vacancy centers in the diamond, which serve as a nanoscopic electric charge sensor. The proposed device innovates the strategies for NA imaging and delivery, by providing detection of the intracellular release of non-labeled NAs without affecting cellular processing of the NAs. Our system highlights the potential of nanodiamonds to act not merely as labels but also as non-toxic and non-photobleachable fluorescent biosensors reporting complex molecular events.
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Affiliation(s)
- V Petrakova
- Faculty of Biomedical Engineering, Czech Technical University in Prague, Sitna sq. 3105, 272 01 Kladno, Czech Republic and Institute of Physics AS CR, v.v.i, Na Slovance 1999/2, 182 21 Prague 8, Czech Republic
| | - V Benson
- Faculty of Biomedical Engineering, Czech Technical University in Prague, Sitna sq. 3105, 272 01 Kladno, Czech Republic and Institute of Microbiology AS CR, v.v.i, Videnska 1083, 142 20 Prague 4, Czech Republic
| | - M Buncek
- Generi Biotech Ltd., Machkova 587, 500 11 Hradec Kralove, Czech Republic
| | - A Fiserova
- Faculty of Biomedical Engineering, Czech Technical University in Prague, Sitna sq. 3105, 272 01 Kladno, Czech Republic and Institute of Microbiology AS CR, v.v.i, Videnska 1083, 142 20 Prague 4, Czech Republic
| | - M Ledvina
- Faculty of Biomedical Engineering, Czech Technical University in Prague, Sitna sq. 3105, 272 01 Kladno, Czech Republic and Institute of Organic Chemistry and Biochemistry AS CR, v.v.i., Flemingovo nam. 2, 166 10 Prague 6, Czech Republic.
| | - J Stursa
- Nuclear Physics Institute AS CR, v.v.i., 250 68, Rez near Prague, Czech Republic
| | - P Cigler
- Institute of Organic Chemistry and Biochemistry AS CR, v.v.i., Flemingovo nam. 2, 166 10 Prague 6, Czech Republic.
| | - M Nesladek
- Faculty of Biomedical Engineering, Czech Technical University in Prague, Sitna sq. 3105, 272 01 Kladno, Czech Republic and IMEC Division IMOMEC, Hasselt University, Wetenschapspark 1, B-3590, Diepenbeek, Belgium and Institute for Materials Research, Hasselt University, Wetenschapspark 1, B-3590 Diepenbeek, Belgium.
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14
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The intracellular trafficking mechanism of Lipofectamine-based transfection reagents and its implication for gene delivery. Sci Rep 2016; 6:25879. [PMID: 27165510 PMCID: PMC4863168 DOI: 10.1038/srep25879] [Citation(s) in RCA: 136] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Accepted: 04/25/2016] [Indexed: 12/23/2022] Open
Abstract
Lipofectamine reagents are widely accepted as "gold-standard" for the safe delivery of exogenous DNA or RNA into cells. Despite this, a satisfactory mechanism-based explanation of their superior efficacy has remained mostly elusive thus far. Here we apply a straightforward combination of live cell imaging, single-particle tracking microscopy, and quantitative transfection-efficiency assays on live cells to unveil the intracellular trafficking mechanism of Lipofectamine/DNA complexes. We find that Lipofectamine, contrary to alternative formulations, is able to efficiently avoid active intracellular transport along microtubules, and the subsequent entrapment and degradation of the payload within acidic/digestive lysosomal compartments. This result is achieved by random Brownian motion of Lipofectamine-containing vesicles within the cytoplasm. We demonstrate here that Brownian diffusion is an efficient route for Lipofectamine/DNA complexes to avoid metabolic degradation, thus leading to optimal transfection. By contrast, active transport along microtubules results in DNA degradation and subsequent poor transfection. Intracellular trafficking, endosomal escape and lysosomal degradation appear therefore as highly interdependent phenomena, in such a way that they should be viewed as a single barrier on the route for efficient transfection. As a matter of fact, they should be evaluated in their entirety for the development of optimized non-viral gene delivery vectors.
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15
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Tammam SN, Azzazy HME, Lamprecht A. How successful is nuclear targeting by nanocarriers? J Control Release 2016; 229:140-153. [PMID: 26995759 DOI: 10.1016/j.jconrel.2016.03.022] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Revised: 03/12/2016] [Accepted: 03/14/2016] [Indexed: 12/22/2022]
Abstract
The nucleus is ultimately the final target for many therapeutics treating various disorders including cancers, heart dysfunction and brain disorders. Owing to their specialized cell uptake and trafficking mechanisms, nanoparticles (NPs) allow drug targeting where degradation sensitive therapeutics could be delivered to their target tissues and cell in active form and sufficient concentration. However, it has recently become increasingly obvious that cytosolic internalization of a drug molecule does not entail its interaction with its subcellular target and hence careful nanoparticle design and optimization is required to enable nuclear targeting. This review, discusses the barriers to NP nuclear delivery; crossing the cell membrane, endo/lysosomal escape, cytoplasmic trafficking and finally nuclear entry focusing on how NP synthesis and modification could allow for bypassing each of the aforementioned barriers and successfully reaching the nucleus. Examples of nuclear targeted NPs are also discussed, stressing on the critical aspects of nuclear targeting and pointing out how the disease state might change the normal NP path and how such change could be exploited to increase efficiency of nuclear targeting. Finally, the criteria set for the evaluation of nanocarriers for nuclear delivery are discussed highlighting that quantitative rather than qualitative evaluation is required to evaluate how successful nanocarriers for nuclear delivery are, particularly with regards to the amount of drug delivered and released in the nucleus.
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Affiliation(s)
- Salma N Tammam
- Laboratory of Pharmaceutical Technology and Biopharmaceutics, University of Bonn, 53121, Germany; Department of Chemistry, The American University in Cairo, 11835, Egypt.
| | - Hassan M E Azzazy
- Department of Chemistry, The American University in Cairo, 11835, Egypt
| | - Alf Lamprecht
- Laboratory of Pharmaceutical Technology and Biopharmaceutics, University of Bonn, 53121, Germany; Laboratory of Pharmaceutical Engineering, University of Franche-Comté, Besançon 25000, France
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16
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Wang YY, Nunn KL, Harit D, McKinley SA, Lai SK. Minimizing biases associated with tracking analysis of submicron particles in heterogeneous biological fluids. J Control Release 2015; 220:37-43. [PMID: 26478013 DOI: 10.1016/j.jconrel.2015.10.021] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Revised: 08/31/2015] [Accepted: 10/13/2015] [Indexed: 10/22/2022]
Abstract
Tracking the dynamic motion of individual nanoparticles or viruses offers quantitative insights into their real-time behavior and fate in different biological environments. Indeed, particle tracking is a powerful tool that has facilitated the development of drug carriers with enhanced penetration of mucus, brain tissues and other extracellular matrices. Nevertheless, heterogeneity is a hallmark of nanoparticle diffusion in such complex environments: identical particles can exhibit strongly hindered or unobstructed diffusion within microns of each other. The common practice in 2D particle tracking, namely analyzing all trackable particle traces with equal weighting, naturally biases towards rapidly diffusing sub-populations at shorter time scales. This in turn results in misrepresentation of particle behavior and a systematic underestimate of the time necessary for a population of nanoparticles to diffuse specific distances. We show here via both computational simulation and experimental data that this bias can be rigorously corrected by weighing the contribution by each particle trace on a 'frame-by-frame' basis. We believe this methodology presents an important step towards objective and accurate assessment of the heterogeneous transport behavior of submicron drug carriers and pathogens in biological environments.
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Affiliation(s)
- Ying-Ying Wang
- Department of Biophysics, Johns Hopkins University, 3400 North Charles St, Baltimore, MD 21218, USA
| | - Kenetta L Nunn
- UNC/NCSU Joint Department of Biomedical Engineering, University of North Carolina - Chapel Hill, 120 Mason Farm Road, Chapel Hill, NC 27599, USA
| | - Dimple Harit
- Division of Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina - Chapel Hill, 120 Mason Farm Road, Chapel Hill, NC 27599, USA
| | - Scott A McKinley
- Mathematics Department, University of Florida, 1400 Stadium Road, Gainesville, FL 32611, USA
| | - Samuel K Lai
- UNC/NCSU Joint Department of Biomedical Engineering, University of North Carolina - Chapel Hill, 120 Mason Farm Road, Chapel Hill, NC 27599, USA; Division of Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina - Chapel Hill, 120 Mason Farm Road, Chapel Hill, NC 27599, USA; Department of Microbiology and Immunology, University of North Carolina School of Medicine, 125 Mason Farm Road, Chapel Hill, NC 27599, USA.
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17
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Schuster BS, Ensign LM, Allan DB, Suk JS, Hanes J. Particle tracking in drug and gene delivery research: State-of-the-art applications and methods. Adv Drug Deliv Rev 2015; 91:70-91. [PMID: 25858664 DOI: 10.1016/j.addr.2015.03.017] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Revised: 03/25/2015] [Accepted: 03/27/2015] [Indexed: 01/17/2023]
Abstract
Particle tracking is a powerful microscopy technique to quantify the motion of individual particles at high spatial and temporal resolution in complex fluids and biological specimens. Particle tracking's applications and impact in drug and gene delivery research have greatly increased during the last decade. Thanks to advances in hardware and software, this technique is now more accessible than ever, and can be reliably automated to enable rapid processing of large data sets, thereby further enhancing the role that particle tracking will play in drug and gene delivery studies in the future. We begin this review by discussing particle tracking-based advances in characterizing extracellular and cellular barriers to therapeutic nanoparticles and in characterizing nanoparticle size and stability. To facilitate wider adoption of the technique, we then present a user-friendly review of state-of-the-art automated particle tracking algorithms and methods of analysis. We conclude by reviewing technological developments for next-generation particle tracking methods, and we survey future research directions in drug and gene delivery where particle tracking may be useful.
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Affiliation(s)
- Benjamin S Schuster
- Center for Nanomedicine, Johns Hopkins University School of Medicine , Baltimore, MD 21231, USA
- Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Laura M Ensign
- Center for Nanomedicine, Johns Hopkins University School of Medicine , Baltimore, MD 21231, USA
- Department of Ophthalmology, Johns Hopkins University School of Medicine, Baltimore, MD 21231, USA
| | - Daniel B Allan
- Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD, 21218 USA
| | - Jung Soo Suk
- Center for Nanomedicine, Johns Hopkins University School of Medicine , Baltimore, MD 21231, USA
- Department of Ophthalmology, Johns Hopkins University School of Medicine, Baltimore, MD 21231, USA
| | - Justin Hanes
- Center for Nanomedicine, Johns Hopkins University School of Medicine , Baltimore, MD 21231, USA
- Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
- Department of Ophthalmology, Johns Hopkins University School of Medicine, Baltimore, MD 21231, USA
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18
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Xie L, Jiang Q, He Y, Nie Y, Yue D, Gu Z. Insight into the efficient transfection activity of a designed low aggregated magnetic polyethyleneimine/DNA complex in serum-containing medium and the application in vivo. Biomater Sci 2015. [DOI: 10.1039/c4bm00317a] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
In vitro fate of designed low aggregated magnetic polyethyleneimine/DNA (MPD-cc) complexes and in vivo study via systemic administration.
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Affiliation(s)
- Li Xie
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu 610064
- P. R. China
| | - Qian Jiang
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu 610064
- P. R. China
| | - Yiyan He
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu 610064
- P. R. China
| | - Yu Nie
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu 610064
- P. R. China
| | - Dong Yue
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu 610064
- P. R. China
| | - Zhongwei Gu
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu 610064
- P. R. China
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19
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Mykhaylyk O, Sanchez-Antequera Y, Vlaskou D, Cerda MB, Bokharaei M, Hammerschmid E, Anton M, Plank C. Magnetic nanoparticle and magnetic field assisted siRNA delivery in vitro. Methods Mol Biol 2015; 1218:53-106. [PMID: 25319646 DOI: 10.1007/978-1-4939-1538-5_5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
This chapter describes how to design and conduct experiments to deliver siRNA to adherent cell cultures in vitro by magnetic force-assisted transfection using self-assembled complexes of small interfering RNA (siRNA) and cationic lipids or polymers that are associated with magnetic nanoparticles (MNPs). These magnetic complexes are targeted to the cell surface by the application of a gradient magnetic field. A further development of the magnetic drug-targeting concept is combining it with an ultrasound-triggered delivery using magnetic microbubbles as a carrier for gene or drug delivery. For this purpose, selected MNPs, phospholipids, and siRNAs are assembled in the presence of perfluorocarbon gas into flexible formulations of magnetic lipospheres (microbubbles). Methods are described how to accomplish the synthesis of magnetic nanoparticles for magnetofection and how to test the association of siRNA with the magnetic components of the transfection vector. A simple method is described to evaluate magnetic responsiveness of the magnetic siRNA transfection complexes and estimate the complex loading with magnetic nanoparticles. Procedures are provided for the preparation of magnetic lipoplexes and polyplexes of siRNA as well as magnetic microbubbles for magnetofection and downregulation of the target gene expression analysis with account for the toxicity determined using an MTT-based respiration activity test. A modification of the magnetic transfection triplexes with INF-7, fusogenic peptide, is described resulting in reporter gene silencing improvement in HeLa, Caco-2, and ARPE-19 cells. The methods described can also be useful for screening vector compositions and novel magnetic nanoparticle preparations for optimized siRNA transfection by magnetofection in any cell type.
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Affiliation(s)
- Olga Mykhaylyk
- Institute of Experimental Oncology, Klinikum rechts der Isar der Technischen Universität München, Ismaninger Strasse 22, Munich, 81675, Germany,
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20
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Ligon TS, Leonhardt C, Rädler JO. Multi-level kinetic model of mRNA delivery via transfection of lipoplexes. PLoS One 2014; 9:e107148. [PMID: 25237886 PMCID: PMC4169511 DOI: 10.1371/journal.pone.0107148] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2014] [Accepted: 08/14/2014] [Indexed: 12/20/2022] Open
Abstract
Recent work on the use of mRNA lipoplexes for gene delivery demonstrates the need for a mathematical model that simulates and predicts kinetics and transfection efficiency. The small copy numbers involved make it necessary to use stochastic models and include statistical analysis of the variation observed in the experimental data. The modeling requirements are further complicated by the multi-level nature of the problem, where mRNA molecules are contained in lipoplexes, which are in turn contained in endosomes, where each of these entities displays a behavior of its own. We have created a mathematical model that reproduces both the time courses and the statistical variance observed in recent experiments using single-cell tracking of GFP expression after transfection. By applying a few key simplifications and assumptions, we have limited the number of free parameters to five, which we optimize to match five experimental determinants by means of a simulated annealing algorithm. The models demonstrate the need for modeling of nested species in order to reproduce the shape of the dose-response and expression-level curves.
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Affiliation(s)
- Thomas S. Ligon
- Faculty of Physics and Center for NanoScience (CeNS), Ludwig-Maximilians-Universität, München, Germany
- * E-mail:
| | - Carolin Leonhardt
- Faculty of Physics and Center for NanoScience (CeNS), Ludwig-Maximilians-Universität, München, Germany
| | - Joachim O. Rädler
- Faculty of Physics and Center for NanoScience (CeNS), Ludwig-Maximilians-Universität, München, Germany
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21
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New views and insights into intracellular trafficking of drug-delivery systems by fluorescence fluctuation spectroscopy. Ther Deliv 2014; 5:173-88. [DOI: 10.4155/tde.13.148] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Biomaterials in the nanometer size range can be engineered for site-specific delivery of drugs after injection into the blood circulation. However, translation of such nanomedicines from the bench to the bedside is still hindered by many extracellular and intracellular barriers. To realize the concept of targeted drug delivery with nanomedicines, research groups are studying intensively the extra- and intra-cellular mechanisms involved as a response to the physicochemical properties of the nanomedicines. In this review, we highlight the contributions of fluorescence fluctuations spectroscopy techniques to better understand, and in turn to bypass, the major hurdles to therapeutic delivery, focusing mostly on the intracellular dynamics of drug-delivery systems.
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22
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Torrano AA, Blechinger J, Osseforth C, Argyo C, Reller A, Bein T, Michaelis J, Bräuchle C. A fast analysis method to quantify nanoparticle uptake on a single cell level. Nanomedicine (Lond) 2013; 8:1815-28. [DOI: 10.2217/nnm.12.178] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Aim: This study examines the absolute quantification of particle uptake into cells. Methods: We developed a novel method to analyze stacks of confocal fluorescence images of single cells interacting with nano-and micro-particles. Particle_in_Cell-3D is a freely available ImageJ macro. During the image analysis routine, single cells are reconstructed in 3D and split into two volumes – intracellular and the membrane region. Next, particles are localized and color-coded accordingly. The mean intensity of single particles, measured in calibration experiments, is used to determine the absolute number of particles. Results: Particle_in_Cell-3D was successfully applied to measure the uptake of 80-nm mesoporous silica nanoparticles into HeLa cells. Furthermore, it was used to quantify the absolute number of 100-nm polystyrene nanoparticles forming agglomerates of up to five particles; the accuracy of these results was confirmed by super-resolution, stimulated emission depletion microscopy. Conclusion: Particle_in_Cell-3D is a fast and accurate method that allows the quantification of particle uptake into cells. Original submitted 10 May 2011; Revised submitted 15 October 2012; Published online 5 February 2013
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Affiliation(s)
- Adriano A Torrano
- Ludwig-Maximilians-University Munich, Department of Chemistry & Center for NanoScience, Butenandtstrasse 11, Gerhard-Ertl-Gebäude, 81377 Munich, Germany
| | - Julia Blechinger
- Ludwig-Maximilians-University Munich, Department of Chemistry & Center for NanoScience, Butenandtstrasse 11, Gerhard-Ertl-Gebäude, 81377 Munich, Germany
| | - Christian Osseforth
- Ludwig-Maximilians-University Munich, Department of Chemistry & Center for NanoScience, Butenandtstrasse 11, Gerhard-Ertl-Gebäude, 81377 Munich, Germany
| | - Christian Argyo
- Ludwig-Maximilians-University Munich, Department of Chemistry & Center for NanoScience, Butenandtstrasse 11, Gerhard-Ertl-Gebäude, 81377 Munich, Germany
| | - Armin Reller
- University of Augsburg, Institute for Physics, Universitätsstrasse 1a, 86159 Augsburg, Germany
| | - Thomas Bein
- Ludwig-Maximilians-University Munich, Department of Chemistry & Center for NanoScience, Butenandtstrasse 11, Gerhard-Ertl-Gebäude, 81377 Munich, Germany
| | - Jens Michaelis
- Ludwig-Maximilians-University Munich, Department of Chemistry & Center for NanoScience, Butenandtstrasse 11, Gerhard-Ertl-Gebäude, 81377 Munich, Germany
- Ulm University, Faculty of Natural Sciences, Institute of Biophysics Albert-Einstein Allee 11, 89081 Ulm, Germany
| | - Christoph Bräuchle
- Ludwig-Maximilians-University Munich, Department of Chemistry & Center for NanoScience, Butenandtstrasse 11, Gerhard-Ertl-Gebäude, 81377 Munich, Germany
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23
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Conceptual design of integrated microfluidic system for magnetic cell separation, electroporation, and transfection. Phys Med 2013; 29:562-7. [DOI: 10.1016/j.ejmp.2012.11.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2012] [Revised: 11/19/2012] [Accepted: 11/24/2012] [Indexed: 11/24/2022] Open
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24
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Intracellular tracking of single-plasmid DNA particles after delivery by electroporation. Mol Ther 2013; 21:2217-26. [PMID: 23941812 DOI: 10.1038/mt.2013.182] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Accepted: 07/25/2013] [Indexed: 01/09/2023] Open
Abstract
Electroporation is a physical method of transferring molecules into cells and tissues. It takes advantage of the transient permeabilization of the cell membrane induced by electric field pulses, which gives hydrophilic molecules access to the cytoplasm. This method offers high transfer efficiency for small molecules that freely diffuse through electrically permeabilized membranes. Larger molecules, such as plasmid DNA, face several barriers (plasma membrane, cytoplasmic crowding, and nuclear envelope), which reduce transfection efficiency and engender a complex mechanism of transfer. Our work provides insight into the way electrotransferred DNA crosses the cytoplasm to reach the nucleus. For this purpose, single-particle tracking experiments of fluorescently labeled DNA were performed. Investigations were focused on the involvement of the cytoskeleton using drugs disrupting or stabilizing actin and tubulin filaments as the two relevant cellular networks for particle transport. The analysis of 315 movies (~4,000 trajectories) reveals that DNA is actively transported through the cytoskeleton. The large number of events allows a statistical quantification of the DNA motion kinetics inside the cell. Disruption of both filament types reduces occurrence and velocities of active transport and displacements of DNA particles. Interestingly, stabilization of both networks does not enhance DNA transport.
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25
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Coppola S, Pozzi D, De Sanctis SC, Digman MA, Gratton E, Caracciolo G. Quantitative measurement of intracellular transport of nanocarriers by spatio-temporal image correlation spectroscopy. Methods Appl Fluoresc 2013; 1. [PMID: 24376913 DOI: 10.1088/2050-6120/1/1/015005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Spatio-temporal image correlation spectroscopy (STICS) is a powerful technique for assessing the nature of particle motion in complex systems although it has been rarely used to investigate the intracellular dynamics of nanocarriers so far. Here we introduce a method to characterize the mode of motion of nanocarriers and to quantify their transport parameters on different length scales from single-cell to subcellular level. Using this strategy we were able to study the mechanisms responsible for the intracellular transport of DOTAP-DOPC/DNA and DC-Chol-DOPE/DNA lipoplexes in CHO-K1 live cells. Measurement of both diffusion coefficients and velocity vectors (magnitude and direction) averaged over regions of the cell revealed the presence of distinct modes of motion. Lipoplexes diffused slowly on the cell surface (diffusion coefficient, D ≈ 0.003 µm2/s). In the cytosol, the lipoplexes' motion was characterized by active transport with average velocity ν ≈ 0.03 µm/s and random motion. The method permitted us to generate intracellular transport map showing several regions of concerted motion of lipoplexes.
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26
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Xie L, Jiang W, Nie Y, He Y, Jiang Q, Lan F, Wu Y, Gu Z. Low aggregation magnetic polyethyleneimine complexes with different saturation magnetization for efficient gene transfection in vitro and in vivo. RSC Adv 2013. [DOI: 10.1039/c3ra43588a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
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27
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Akita H, Enoto K, Tanaka H, Harashima H. Particle tracking analysis for the intracellular trafficking of nanoparticles modified with African swine fever virus protein p54-derived peptide. Mol Ther 2012; 21:309-17. [PMID: 23164937 DOI: 10.1038/mt.2012.235] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Previous studies showed that the cytoplasmic transport of nanoparticles to the nucleus is driven by a vesicular sorting system. Artificial approaches for targeting a microtubule-associating motor complex is also a challenge. We describe herein the development of a liposomal nanoparticle, the surface of which is modified with stearylated octa-arginine (STR-R8), and a dynein light chain (LC8)-associated peptide derived from an African swine fever virus protein p54 (p54(149-161)) with polyethyleneglycol (PEG) as a spacer (p54(149-161)-PEG/R8-liposomal nanoparticles (LNPs)). The p54(149-161)-PEG/R8-LNPs preferentially gain access to the nucleus, resulting in a one- to two-order of magnitude higher transfection activity in comparison with p54(149-161)-free nanoparticles (PEG/R8-LNPs). Further studies of particle tracking in HeLa cells stably expressing green fluorescent protein (GFP)-tagged tubulin (GFP/Tub-HeLa) indicate that p54(149-161) stimulated the transport of nanoparticles along fibrous tubulin structures. Moreover, a part of the p54(149-161)-PEG/R8-LNPs appeared to undergo quasi-straight transport without sharing the tracks corresponding to PKH67, the plasma membrane of which had been prestained with a marker just before transfection, while corresponding movement was never observed in the case of PEG/R8-LNPs. These findings suggest that a portion of the p54(149-161)-modified nanoparticles can use microtubule-dependent transport without the need for an assist by a vesicular sorting system.
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Affiliation(s)
- Hidetaka Akita
- Laboratory for Molecular Design of Pharmaceutics, Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
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28
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Lee S, Shim G, Kim S, Kim YB, Kim CW, Byun Y, Oh YK. Enhanced Transfection Rates of Small-Interfering RNA Using Dioleylglutamide-Based Magnetic Lipoplexes. Oligonucleotides 2012. [DOI: 10.1089/oli.2010.0274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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29
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MagnetofectionTM platform: from magnetic nanoparticles to novel nucleic acid therapeutics. Ther Deliv 2012; 2:717-26. [PMID: 22822504 DOI: 10.4155/tde.11.37] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Nucleic acid delivery to cells to make them produce a desired protein or to shut down the expression of endogenous genes opens unique possibilities for research and therapy. During the last decade, to realize the potential of this approach, nanomagnetic methods for delivering and targeting nucleic acids have been developed, methods which are often referred to as Magnetofection. Our research group at the Institute of Experimental Oncology and Therapy Research, located at the University Hospital Klinikum rechts der Isar in the center of Munich, Germany, develops new magnetic nanomaterials and, their formulations with gene-delivery vectors and technologies to allow localized and efficient gene delivery in vitro and in vivo for a variety of research, diagnostic and therapeutic applications.
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30
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Coppola S, Estrada LC, Digman MA, Pozzi D, Cardarelli F, Gratton E, Caracciolo G. Intracellular trafficking of cationic liposome-DNA complexes in living cells. SOFT MATTER 2012; 8:7919-7927. [PMID: 25152766 PMCID: PMC4138718 DOI: 10.1039/c2sm25532d] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Three-dimensional single-particle tracking (SPT) was used to calculate the mean square displacement (MSD) and the diffusion coefficients of multicomponent cationic liposome-DNA complexes (lipoplexes) in CHO-K1 living cells. In untreated (NT) control cells, we found that the intracellular lipoplex motion was either directed or Brownian with active transportation being definitely more frequent (more than 70%) than Brownian diffusion. The MSD analysis was supported by the calculation of the three-dimensional asphericity, A3, which was close to unity, denoting the preponderant occurrence of movement along a direction. To elucidate the role of the cytoskeleton structure in the lipoplex trafficking, cells were treated with cytoskeleton (actin microfilaments and microtubules) polymerization inhibitors (latrunculin B and nocodazole, respectively). When cells were treated with inhibitors, the lipoplex movement tended towards a random walk at the expense of directed motion. The disassembly of microtubules had a stronger effect on the reduction of directional movement than that of actin microfilaments. Relevance of the results for enhanced gene delivery is discussed.
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Affiliation(s)
- Stefano Coppola
- Department of Molecular Medicine, "Sapienza" University of Rome, Viale Regina Elena 324, 00161 Rome, Italy.
| | - Laura C Estrada
- Laboratory for Fluorescence Dynamics, Department of Biomedical Engineering, University of California, 3120 Natural Sciences 2, Irvine, California 92697-2715, USA
| | - Michelle A Digman
- Laboratory for Fluorescence Dynamics, Department of Biomedical Engineering, University of California, 3120 Natural Sciences 2, Irvine, California 92697-2715, USA
| | - Daniela Pozzi
- Department of Molecular Medicine, "Sapienza" University of Rome, Viale Regina Elena 324, 00161 Rome, Italy.
| | - Francesco Cardarelli
- Center for Nanotechnology Innovation, @NEST, Istituto Italiano di Tecnologia, Piazza San Silvestro 12, 56127 Pisa, Italy
| | - Enrico Gratton
- Laboratory for Fluorescence Dynamics, Department of Biomedical Engineering, University of California, 3120 Natural Sciences 2, Irvine, California 92697-2715, USA
| | - Giulio Caracciolo
- Department of Molecular Medicine, "Sapienza" University of Rome, Viale Regina Elena 324, 00161 Rome, Italy.
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31
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Symens N, Soenen SJ, Rejman J, Braeckmans K, De Smedt SC, Remaut K. Intracellular partitioning of cell organelles and extraneous nanoparticles during mitosis. Adv Drug Deliv Rev 2012; 64:78-94. [PMID: 22210278 DOI: 10.1016/j.addr.2011.11.012] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2011] [Revised: 11/21/2011] [Accepted: 11/23/2011] [Indexed: 02/06/2023]
Abstract
The nucleocytoplasmic partitioning of nanoparticles as a result of cell division is highly relevant to the field of nonviral gene delivery. We reviewed the literature on the intracellular distribution of cell organelles (the endosomal vesicles, Golgi apparatus, endoplasmic reticulum and nucleus), foreign macromolecules (dextrans and plasmid DNA) and inorganic nanoparticles (gold, quantum dot and iron oxide) during mitosis. For nonviral gene delivery particles (lipid- or polymer-based), indirect proof of nuclear entry during mitosis is provided. We also describe how retroviruses and latent DNA viruses take advantage of mitosis to transfer their viral genome and segregate their episomes into the host daughter nuclei. Based on this knowledge, we propose strategies to improve nonviral gene delivery in dividing cells with the ultimate goal of designing nonviral gene delivery systems that are as efficient as their viral counterparts but non-immunogenic, non-oncogenic and easy and inexpensive to prepare.
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Affiliation(s)
- Nathalie Symens
- Laboratory of General Biochemistry and Physical Pharmacy, Ghent Research Group on Nanomedicines, Ghent University, Ghent, Belgium.
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32
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Dejardin T, de la Fuente J, del Pino P, Furlani EP, Mullin M, Smith CA, Berry CC. Influence of both a static magnetic field and penetratin on magnetic nanoparticle delivery into fibroblasts. Nanomedicine (Lond) 2011; 6:1719-31. [DOI: 10.2217/nnm.11.65] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Aim: With regards to nanoparticles, all biomedical applications require cellular uptake, which to date remains a hurdle to further progress. This study aims to compare both the attractive force of a static magnetic field and the cell penetrating capability of penetratin; two techniques currently employed to enhance cell uptake. Materials & Methods: Fluorescent magnetic nanoparticles were functionalized with penetratin and cells were challenged with or without the particles in the presence/absence of a static magnetic field (350 mT). Following analysis of the magnetic field applied, cellular uptake and behavior was assessed in terms of fluorescence microscopy, clathrin and caveolin levels, scanning electron microscopy and transmission electron microscopy. Results: Modeling of the field applied demonstrated varying field patterns across the cell culture area, reflected by higher particle uptake at higher field strengths. Both penetratin and the magnetic field increased cell uptake with penetratin proving more efficient. Interestingly, the magnetic field stimulated clathrin-mediated endocytosis and subsequent particle uptake. Original submitted: 18th January 2011; Revised submitted: 27th April 2011
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Affiliation(s)
- Theophile Dejardin
- Center for Cell Engineering, Joseph Black Building, Glasgow University, G12 8QQ, UK
| | | | - Pablo del Pino
- Laboratory of Glyconanotechnology, Universidad de Saragossa, Spain
| | - Edward P Furlani
- Institute for Lasers, Photonics & Biophotonics, State University of New York, Buffalo, NY 14260, USA
| | - Margaret Mullin
- Center for Cell Engineering, Joseph Black Building, Glasgow University, G12 8QQ, UK
| | - C-A Smith
- Center for Cell Engineering, Joseph Black Building, Glasgow University, G12 8QQ, UK
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33
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Plank C, Zelphati O, Mykhaylyk O. Magnetically enhanced nucleic acid delivery. Ten years of magnetofection-progress and prospects. Adv Drug Deliv Rev 2011; 63:1300-31. [PMID: 21893135 PMCID: PMC7103316 DOI: 10.1016/j.addr.2011.08.002] [Citation(s) in RCA: 251] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2011] [Revised: 08/18/2011] [Accepted: 08/19/2011] [Indexed: 12/28/2022]
Abstract
Nucleic acids carry the building plans of living systems. As such, they can be exploited to make cells produce a desired protein, or to shut down the expression of endogenous genes or even to repair defective genes. Hence, nucleic acids are unique substances for research and therapy. To exploit their potential, they need to be delivered into cells which can be a challenging task in many respects. During the last decade, nanomagnetic methods for delivering and targeting nucleic acids have been developed, methods which are often referred to as magnetofection. In this review we summarize the progress and achievements in this field of research. We discuss magnetic formulations of vectors for nucleic acid delivery and their characterization, mechanisms of magnetofection, and the application of magnetofection in viral and nonviral nucleic acid delivery in cell culture and in animal models. We summarize results that have been obtained with using magnetofection in basic research and in preclinical animal models. Finally, we describe some of our recent work and end with some conclusions and perspectives.
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34
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Delyagina E, Li W, Ma N, Steinhoff G. Magnetic targeting strategies in gene delivery. Nanomedicine (Lond) 2011; 6:1593-604. [DOI: 10.2217/nnm.11.143] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Gene delivery is a process of the insertion of transgenes into cells with the purpose to obtain the expression of encoded protein. The therapeutic application of this process is termed gene therapy, which is becoming a promising instrument to treat genetic and acquired diseases. Although numerous methods of gene transfer have already been developed, including biological, physical and chemical approaches, the optimal strategy has to be discovered. Importantly, it should be effective, selective and safe to be translated to the clinic. Magnetic targeting has been demonstrated as an effective strategy to decrease side effects of gene transfer, while increasing the selectivity and efficiency of the applied vector. This article will focus on the latest progress in the development of different magnetic vectors, based on both viral and nonviral gene delivery agents. It will also include a description of magnetic targeting applications in stem cells and in vivo, which has gained interest in recent years due to the rapid development of technology.
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Affiliation(s)
- Evgenya Delyagina
- Reference & Translation Center for Cardiac Stem Cell Therapy, Department of Cardiac Surgery, University of Rostock, Schillingallee 35, 18057 Rostock, Germany
| | - Wenzhong Li
- Reference & Translation Center for Cardiac Stem Cell Therapy, Department of Cardiac Surgery, University of Rostock, Schillingallee 35, 18057 Rostock, Germany
| | - Nan Ma
- Reference & Translation Center for Cardiac Stem Cell Therapy, Department of Cardiac Surgery, University of Rostock, Schillingallee 35, 18057 Rostock, Germany
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35
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Huang F, Dempsey C, Chona D, Suh J. Quantitative nanoparticle tracking: applications to nanomedicine. Nanomedicine (Lond) 2011; 6:693-700. [PMID: 21718178 DOI: 10.2217/nnm.11.42] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Particle tracking is an invaluable technique to extract quantitative and qualitative information regarding the transport of nanomaterials through complex biological environments. This technique can be used to probe the dynamic behavior of nanoparticles as they interact with and navigate through intra- and extra-cellular barriers. In this article, we focus on the recent developments in the application of particle-tracking technology to nanomedicine, including the study of synthetic and virus-based materials designed for gene and drug delivery. Specifically, we cover research where mean square displacements of nanomaterial transport were explicitly determined in order to quantitatively assess the transport of nanoparticles through biological environments. Particle-tracking experiments can provide important insights that may help guide the design of more intelligent and effective diagnostic and therapeutic nanoparticles.
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Affiliation(s)
- Feiran Huang
- Department of Bioengineering, Rice University, Houston, TX, USA
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Effect of integrin targeting and PEG shielding on polyplex micelle internalization studied by live-cell imaging. J Control Release 2011; 156:364-73. [PMID: 21843561 DOI: 10.1016/j.jconrel.2011.08.003] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2011] [Accepted: 08/02/2011] [Indexed: 11/23/2022]
Abstract
α(v)β(3) and α(v)β(5) integrins are attractive target structures for cancer therapy as they are upregulated in tumor and tumor associated host cells and play a pivotal role for tumor growth and metastasis. Gene vectors such as polyplex micelles consisting of thiolated PEG-block-poly(lysine) copolymers complexed with plasmid DNA can be targeted to these specific integrins by equipment with a cyclic RGD peptide. In this study, we analyzed the effect of the RGD ligand on micelle endocytosis by comparing fluorescently labeled, targeted and untargeted micelles in live-cell imaging experiments with highly sensitive fluorescence microscopy and flow cytometry. Two micelle types with 12 kDa (PEG12) and 17 kDa (PEG17) PEG shell layers were examined to evaluate the influence of surface shielding on the internalization characteristics. Our results reveal three major effects: First, the RGD ligand accelerates the internalization of micelles into integrin expressing HeLa cells without changing the uptake pathway of the micelles. Both targeted as well as untargeted micelles are predominantly internalized via clathrin mediated endocytosis. Second, the PEG shielding of micelles has an important effect on their targeting specificity. At high PEG shielding selective endocytosis of integrin targeted micelles occurs, whereas at low PEG shielding targeted and untargeted micelles show comparable internalization. In addition, PEG17 RGD(+) micelles induce the highest reporter gene expression. Third, our data demonstrate a clear influence of the applied micelle dose on the internalization of integrin targeted micelles. We propose that PEG17 shielded micelles equipped with a cyclic RGD ligand are the favored system of choice for clinical therapy as they exhibit higher transgene expression, a higher specificity for integrin-dependent endocytosis compared to PEG12 shielded micelles, and are functional at low doses as well.
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Ruthardt N, Lamb DC, Bräuchle C. Single-particle tracking as a quantitative microscopy-based approach to unravel cell entry mechanisms of viruses and pharmaceutical nanoparticles. Mol Ther 2011; 19:1199-211. [PMID: 21654634 DOI: 10.1038/mt.2011.102] [Citation(s) in RCA: 160] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Highly sensitive fluorescence microscopy techniques allow single nanoparticles to be tracked during their uptake into living cells with high temporal and spatial resolution. From analysis of the trajectories, random motion can be discriminated from active transport and the average transport velocity and/or diffusion coefficient determined. Such an analysis provides important information regarding the uptake pathway and location of viruses and nanoparticles. In this review, we give an introduction into single-particle tracking (SPT) and determination of the mean-squared displacement. We also give an overview of recent advances in SPT. These include millisecond alternating-laser excitation for removal of spectral crosstalk, alternating wide-field (WF), and total internal reflection fluorescence (TIRF) microscopy for sensitive experiments at the plasma membrane and three-dimensional tracking strategies. Throughout the review, we highlight recent advances regarding the entry (and egress) of natural and artificial viruses obtained via SPT.
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Affiliation(s)
- Nadia Ruthardt
- Department of Chemistry, Ludwig-Maximilians-Universität München, Munich, Germany
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Affiliation(s)
- You Han Bae
- University of Utah, Department of Pharmaceutics and Pharmaceutical Chemistry, College of Pharmacy, Salt Lake City, UT 84108, USA
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Lee S, Shim G, Kim S, Kim YB, Kim CW, Byun Y, Oh YK. Enhanced Transfection Rates of Small-Interfering RNA Using Dioleylglutamide-Based Magnetic Lipoplexes. Nucleic Acid Ther 2011; 21:165-72. [DOI: 10.1089/nat.2010.0274] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Affiliation(s)
- Soondong Lee
- Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Seoul, South Korea
| | - Gayong Shim
- School of Life Sciences and Biotechnology, Korea University, Seoul, South Korea
| | - Sunil Kim
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, South Korea
| | - Young Bong Kim
- Department of Animal Biotechnology, Konkuk University, Seoul, South Korea
| | - Chan-Wha Kim
- School of Life Sciences and Biotechnology, Korea University, Seoul, South Korea
| | - Youngro Byun
- Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Seoul, South Korea
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, South Korea
| | - Yu-Kyoung Oh
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, South Korea
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40
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Nucleic acid delivery using magnetic nanoparticles: the Magnetofection™ technology. Ther Deliv 2011; 2:471-82. [DOI: 10.4155/tde.11.12] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
In recent years, gene therapy has received considerable interest as a potential method for the treatment of numerous inherited and acquired diseases. However, successes have so far been hampered by several limitations, including safety issues of viral-based nucleic acid vectors and poor in vivo efficiency of nonviral vectors. Magnetofection™ has been introduced as a novel and powerful tool to deliver genetic material into cells. This technology is defined as the delivery of nucleic acids, either ‘naked’ or packaged (as complexes with lipids or polymers, and viruses) using magnetic nanoparticles under the guidance of an external magnetic field. This article first discusses the principles of the Magnetofection technology and its benefits as compared with standard transfection methods. A number of relevant examples of its use, both in vitro and in vivo, will then be highlighted. Future trends in the development of new magnetic nanoparticle formulations will also be outlined.
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Ang D, Nguyen Q, Kayal S, Preiser P, Rawat R, Ramanujan R. Insights into the mechanism of magnetic particle assisted gene delivery. Acta Biomater 2011; 7:1319-26. [PMID: 20920614 DOI: 10.1016/j.actbio.2010.09.037] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2010] [Revised: 09/20/2010] [Accepted: 09/28/2010] [Indexed: 11/26/2022]
Abstract
In magnetic particle assisted gene delivery DNA is complexed with polymer-coated aggregated magnetic nanoparticles (AMNPs) to effect transfection. In vitro studies based on COS-7 cells were carried out using pEGFP-N1 and pMIR-REPORT-complexed, polyethylenimine (PEI)-coated iron oxide magnetic nanoparticles (MNPs). PEI-coated AMNPs (PEI-AMNPs) with average individual particle diameters of 8, 16 and 30 nm were synthesized. Normal, reverse and retention magnetic transfection experiments and cell wounding assays were performed. Our results show that the optimum magnetic field yields maximum transfection efficiency with good viability. The results of the normal, reverse and retention magnetic transfection experiments show that the highest transfection efficiency was achieved in normal magnetic transfection mode due to clustering of the PEI-AMNPs on the cells. Cell wounding assay results suggest that the mechanism of magnetic transfection is endocytosis rather than cell wounding.
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42
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Magselectofection: an integrated method of nanomagnetic separation and genetic modification of target cells. Blood 2011; 117:e171-81. [PMID: 21357765 DOI: 10.1182/blood-2010-08-302646] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Research applications and cell therapies involving genetically modified cells require reliable, standardized, and cost-effective methods for cell manipulation. We report a novel nanomagnetic method for integrated cell separation and gene delivery. Gene vectors associated with magnetic nanoparticles are used to transfect/transduce target cells while being passaged and separated through a high gradient magnetic field cell separation column. The integrated method yields excellent target cell purity and recovery. Nonviral and lentiviral magselectofection is efficient and highly specific for the target cell population as demonstrated with a K562/Jurkat T-cell mixture. Both mouse and human enriched hematopoietic stem cell pools were effectively transduced by lentiviral magselectofection, which did not affect the hematopoietic progenitor cell number determined by in vitro colony assays. Highly effective reconstitution of T and B lymphocytes was achieved by magselectofected murine wild-type lineage-negative Sca-1(+) cells transplanted into Il2rg(-/-) mice, stably expressing GFP in erythroid, myeloid, T-, and B-cell lineages. Furthermore, nonviral, lentiviral, and adenoviral magselectofection yielded high transfection/transduction efficiency in human umbilical cord mesenchymal stem cells and was fully compatible with their differentiation potential. Upscaling to a clinically approved automated cell separation device was feasible. Hence, once optimized, validated, and approved, the method may greatly facilitate the generation of genetically engineered cells for cell therapies.
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Blechinger J, Herrmann R, Kiener D, García-García FJ, Scheu C, Reller A, Bräuchle C. Perylene-labeled silica nanoparticles: synthesis and characterization of three novel silica nanoparticle species for live-cell imaging. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2010; 6:2427-35. [PMID: 20878633 DOI: 10.1002/smll.201000762] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The increasing exposure of humans to nanoscaled particles requires well-defined systems that enable the investigation of the toxicity of nanoparticles on the cellular level. To facilitate this, surface-labeled silica nanoparticles, nanoparticles with a labeled core and a silica shell, and a labeled nanoparticle network-all designed for live-cell imaging-are synthesized. The nanoparticles are functionalized with perylene derivatives. For this purpose, two different perylene species containing one or two reactive silica functionalities are prepared. The nanoparticles are studied by transmission electron microscopy, widefield and confocal fluorescence microscopy, as well as by fluorescence spectroscopy in combination with fluorescence anisotropy, in order to characterize the size and morphology of the nanoparticles and to prove the success and homogeneity of the labeling. Using spinning-disc confocal measurements, silica nanoparticles are demonstrated to be taken up by HeLa cells, and they are clearly detectable inside the cytoplasm of the cells.
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Affiliation(s)
- Julia Blechinger
- Ludwig-Maximilians-University Munich, Department of Chemistry, Physical Chemistry I, Butenandtstr. 11, Gerhard-Ertl-Gebäude, 81377 Munich, Germany
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Sauer AM, Schlossbauer A, Ruthardt N, Cauda V, Bein T, Bräuchle C. Role of endosomal escape for disulfide-based drug delivery from colloidal mesoporous silica evaluated by live-cell imaging. NANO LETTERS 2010; 10:3684-3691. [PMID: 20677799 DOI: 10.1021/nl102180s] [Citation(s) in RCA: 125] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Redox-driven intracellular disulfide-cleavage is a promising strategy to achieve stimuli-responsive and controlled drug release. We synthesized colloidal mesoporous silica (CMS) nanoparticles with ATTO633-labeled cysteine linked to the inner particle core via disulfide-bridges and characterized their cysteine release behavior after internalization into HuH7 cells by high-resolution fluorescence microscopy. Our study revealed that endosomal escape is a bottleneck for disulfide-linkage based drug release. Photochemical opening of the endosome leads to successful delivery of fluorescently labeled cysteine to the cytosol.
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Affiliation(s)
- Anna M Sauer
- Department of Chemistry and Center for Nanoscience, University of Munich LMU, Butenandtstrasse 11, Gerhardt-Ertl-Building, 81377 Munich, Germany
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Cauda V, Engelke H, Sauer A, Arcizet D, Bräuchle C, Rädler J, Bein T. Colchicine-loaded lipid bilayer-coated 50 nm mesoporous nanoparticles efficiently induce microtubule depolymerization upon cell uptake. NANO LETTERS 2010; 10:2484-2492. [PMID: 20515041 DOI: 10.1021/nl100991w] [Citation(s) in RCA: 117] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We report on a one-step assembly route where supported lipid bilayers (SLB) are deposited on functionalized colloidal mesoporous silica (CMS) nanoparticles, resulting in a core-shell hybrid system (SLB@CMS). The supported membrane acts as an intact barrier against the escape of encapsulated dye molecules. These stable SLB@CMS particles loaded with the anticancer drug colchicine are readily taken up by cells and lead to the depolymerization of microtubules with remarkably enhanced efficiency as compared to the same dose of drug in solution.
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Affiliation(s)
- Valentina Cauda
- Department of Chemistry, University of Munich (LMU), Munich, Germany
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46
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Fouriki A, Farrow N, Clements MA, Dobson J. Evaluation of the magnetic field requirements for nanomagnetic gene transfection. NANO REVIEWS 2010; 1:NANO-1-5167. [PMID: 22110859 PMCID: PMC3215215 DOI: 10.3402/nano.v1i0.5167] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/25/2010] [Revised: 06/04/2010] [Accepted: 06/04/2010] [Indexed: 11/27/2022]
Abstract
The objective of this work was to examine the effects of magnet distance (and by proxy, field strength) on nanomagnetic transfection efficiency.
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Affiliation(s)
- A Fouriki
- Institute for Science & Technology in Medicine, Hartshill, Stoke-on-Trent, UK
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47
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Ensenauer R, Hartl D, Vockley J, Roscher AA, Fuchs U. Efficient and gentle siRNA delivery by magnetofection. Biotech Histochem 2010; 86:226-31. [PMID: 20297946 DOI: 10.3109/10520291003675485] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Magnetic force combined with magnetic nanoparticles recently has shown potential for enhancing nucleic acid delivery. Achieving effective siRNA delivery into primary cultured cells is challenging. We compared the utility of magnetofection with lipofection procedures for siRNA delivery to primary and immortalized mammalian fibroblasts. Transfection efficiency and cell viability were analyzed by flow cytometry and effects of gene knockdown were quantified by real-time PCR. Lipofectamine 2000 and magnetofection achieved high transfection efficiencies comparable to similar gene silencing effects of about 80%; the cytotoxic effect of magnetofection, however, was significantly less. Magnetofection is a reliable and gentle alternative method with low cytotoxicity for siRNA delivery into difficult to transfect cells such as mammalian fibroblasts. These features are especially advantageous for functional end point analyses of gene silencing, e.g., on the metabolite level.
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Affiliation(s)
- R Ensenauer
- Children's Research Center, Dr. von Hauner Children's Hospital, Ludwig-Maximilians-Universität München, Munich, Germany.
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48
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Particle tracking of intracellular trafficking of octaarginine-modified liposomes: a comparative study with adenovirus. Mol Ther 2010; 18:955-64. [PMID: 20216528 DOI: 10.1038/mt.2010.33] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
It is previously reported that octaarginine (R8)-modified liposome (R8-Lip) was taken up via macropinocytosis, and subsequently delivered to the nuclear periphery. In the present study, we investigated the mechanism for the cytoplasmic transport of R8-Lips, comparing with that for adenovirus. Treatment with microtubule-disruption reagent (nocodazole) inhibited the transfection activity of plasmid DNA (pDNA)-encapsulating R8-Lip more extensively than that of adenovirus. The directional transport of R8-Lips along green fluorescent protein (GFP)-tagged microtubules was observed; however, the velocity was slower than those for adenovirus or endosomes that were devoid of R8-Lips. These directional motions were abrogated in R8-Lips by nocodazole treatment, whereas adenovirus continued to undergo random motion. This finding suggests that the nuclear access of R8-Lip predominantly involves microtubule-dependent transport, whereas an apparent diffusive motion is also operative in nuclear access of adenovirus. Furthermore, quantum dot-labeled pDNA underwent directional motion concomitantly with rhodamine-labeled lipid envelopes, indicating that the R8-Lips were subject to microtubule-dependent transport in the intact form. Dual particle tracking of carriers and endosomes revealed that R8-Lip was directionally transported, associated with endosomes, whereas this occurs after endosomal escape in adenovirus. Collectively, the findings reported herein indicate that vesicular transport is a key factor in the cytoplasmic transport of R8-Lips.
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Ruthardt N, Bräuchle C. Visualizing uptake and intracellular trafficking of gene carriers by single-particle tracking. Top Curr Chem (Cham) 2010; 296:283-304. [PMID: 21504106 DOI: 10.1007/128_2010_66] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Single-particle microscopy und live-cell single-particle tracking are powerful tools to follow the cellular internalization pathway of individual nanoparticles such as viruses and gene carriers and investigate their interaction with living cells. Those single-cell and single-particle methods can elucidate the "black box" between application of the gene carrier to the cell and the final gene expression and allow the essential bottlenecks to be identified in great detail on the cellular level. In this review we will give a short introduction into single-particle tracking microscopy and present an overview of the mechanisms of DNA delivery from attachment to the cell membrane over internalization towards nuclear entry unraveled by single-particle methods.
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Affiliation(s)
- N Ruthardt
- Department of Chemistry and Biochemistry, Ludwig-Maximilians-Universitait Miinchen, Butenandtstr. 5-13, 81377 München, Germany.
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50
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Park K. Real time tracking of single magnetic lipoplex particles in living cells. J Control Release 2009; 137:89. [PMID: 19447149 DOI: 10.1016/j.jconrel.2009.05.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Kinam Park
- Purdue University, Department of Biomedical Engineering, West Lafayette, Indiana, USA.
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