1
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Greitens C, Leroux JC, Burger M. The intracellular visualization of exogenous DNA in fluorescence microscopy. Drug Deliv Transl Res 2024; 14:2242-2261. [PMID: 38526634 PMCID: PMC11208204 DOI: 10.1007/s13346-024-01563-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/28/2024] [Indexed: 03/27/2024]
Abstract
In the development of non-viral gene delivery vectors, it is essential to reliably localize and quantify transfected DNA inside the cell. To track DNA, fluorescence microscopy methods are commonly applied. These mostly rely on fluorescently labeled DNA, DNA binding proteins fused to a fluorescent protein, or fluorescence in situ hybridization (FISH). In addition, co-stainings are often used to determine the colocalization of the DNA in specific cellular compartments, such as the endolysosomes or the nucleus. We provide an overview of these DNA tracking methods, advice on how they should be combined, and indicate which co-stainings or additional methods are required to draw precise conclusions from a DNA tracking experiment. Some emphasis is given to the localization of exogenous DNA inside the nucleus, which is the last step of DNA delivery. We argue that suitable tools which allow for the nuclear detection of faint signals are still missing, hampering the rational development of more efficient non-viral transfection systems.
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Affiliation(s)
- Christina Greitens
- Institute of Pharmaceutical Sciences, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093, Zurich, Switzerland
| | - Jean-Christophe Leroux
- Institute of Pharmaceutical Sciences, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093, Zurich, Switzerland.
| | - Michael Burger
- Institute of Pharmaceutical Sciences, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093, Zurich, Switzerland.
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2
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Richards CJ, Burgers TCQ, Vlijm R, Roos WH, Åberg C. Rapid Internalization of Nanoparticles by Human Cells at the Single Particle Level. ACS NANO 2023; 17:16517-16529. [PMID: 37642490 PMCID: PMC10510712 DOI: 10.1021/acsnano.3c01124] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Accepted: 08/17/2023] [Indexed: 08/31/2023]
Abstract
Nanoparticle uptake by cells has been studied for applications both in nanomedicine and in nanosafety. While the majority of studies have focused on the biological mechanisms underlying particle internalization, less attention has been given to questions of a more quantitative nature, such as how many nanoparticles enter cells and how rapidly they do so. To address this, we exposed human embryonic kidney cells to 40-200 nm carboxylated polystyrene nanoparticles and the particles were observed by live-cell confocal and super-resolution stimulated emission depletion fluorescence microscopy. How long a particle remained at the cell membrane after adsorbing onto it was monitored, distinguishing whether the particle ultimately desorbed again or was internalized by the cell. We found that the majority of particles desorb, but interestingly, most of the particles that are internalized do so within seconds, independently of particle size. As this is faster than typical endocytic mechanisms, we interpret this observation as the particles entering via an endocytic event that is already taking place (as opposed to directly triggering their own uptake) or possibly via an as yet uncharacterized endocytic route. Aside from the rapidly internalizing particles, a minority of particles remain at the membrane for tens of seconds to minutes before desorbing or being internalized. We also followed particles after cell internalization, observing particles that appeared to exit the cell, sometimes as rapidly as within tens of seconds. Overall, our results provide quantitative information about nanoparticle cell internalization times and early trafficking.
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Affiliation(s)
- Ceri J. Richards
- Pharmaceutical
Analysis, Groningen Research Institute of Pharmacy, University of Groningen, 9713 AV Groningen, The Netherlands
- Molecular
Biophysics, Zernike Institute for Advanced Materials, University of Groningen, 9747 AG Groningen, The Netherlands
| | - Thomas C. Q. Burgers
- Molecular
Biophysics, Zernike Institute for Advanced Materials, University of Groningen, 9747 AG Groningen, The Netherlands
| | - Rifka Vlijm
- Molecular
Biophysics, Zernike Institute for Advanced Materials, University of Groningen, 9747 AG Groningen, The Netherlands
| | - Wouter H. Roos
- Molecular
Biophysics, Zernike Institute for Advanced Materials, University of Groningen, 9747 AG Groningen, The Netherlands
| | - Christoffer Åberg
- Pharmaceutical
Analysis, Groningen Research Institute of Pharmacy, University of Groningen, 9713 AV Groningen, The Netherlands
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3
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Wimmenauer C, Heinzel T. Identification of nanoparticles as vesicular cargo via Airy scanning fluorescence microscopy and spatial statistics. NANOSCALE ADVANCES 2023; 5:3512-3520. [PMID: 37383069 PMCID: PMC10295176 DOI: 10.1039/d3na00188a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Accepted: 06/08/2023] [Indexed: 06/30/2023]
Abstract
Many biomedical applications of nanoparticles on the cellular level require a characterisation of their subcellular distribution. Depending on the nanoparticle and its preferred intracellular compartment, this may be a nontrivial task, and consequently, the available methodologies are constantly increasing. Here, we show that super-resolution microscopy in combination with spatial statistics (SMSS), comprising the pair correlation and the nearest neighbour function, is a powerful tool to identify spatial correlations between nanoparticles and moving vesicles. Furthermore, various types of motion like for example diffusive, active or Lévy flight transport can be distinguished within this concept via suitable statistical functions, which also contain information about the factors limiting the motion, as well as regarding characteristic length scales. The SMSS concept fills a methodological gap related to mobile intracellular nanoparticle hosts and its extension to further scenarios is straightforward. It is exemplified on MCF-7 cells after exposure to carbon nanodots, demonstrating that these particles are stored predominantly in the lysosomes.
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Affiliation(s)
- Christian Wimmenauer
- Institute of Experimental Condensed Matter Physics, Heinrich-Heine-University Universitätsstr. 1 40225 Düsseldorf Germany
| | - Thomas Heinzel
- Institute of Experimental Condensed Matter Physics, Heinrich-Heine-University Universitätsstr. 1 40225 Düsseldorf Germany
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4
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Zhao C, Liu Z, Chang CC, Chen YC, Zhang Q, Zhang XD, Andreou C, Pang J, Liu ZX, Wang DY, Kircher MF, Yang J. Near-Infrared Phototheranostic Iron Pyrite Nanocrystals Simultaneously Induce Dual Cell Death Pathways via Enhanced Fenton Reactions in Triple-Negative Breast Cancer. ACS NANO 2023; 17:4261-4278. [PMID: 36706095 DOI: 10.1021/acsnano.2c06629] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Triple-negative breast cancer (TNBC) is considered more aggressive with a poorer prognosis than other breast cancer subtypes. Through systemic bioinformatic analyses, we established the ferroptosis potential index (FPI) based on the expression profile of ferroptosis regulatory genes and found that TNBC has a higher FPI than non-TNBC in human BC cell lines and tumor tissues. To exploit this finding for potential patient stratification, we developed biologically amenable phototheranostic iron pyrite FeS2 nanocrystals (NCs) that efficiently harness near-infrared (NIR) light, as in photovoltaics, for multispectral optoacoustic tomography (MSOT) and photothermal ablation with a high photothermal conversion efficiency (PCE) of 63.1%. Upon NIR irradiation that thermodynamically enhances Fenton reactions, dual death pathways of apoptosis and ferroptosis are simultaneously triggered in TNBC cells, comprehensively limiting primary and metastatic TNBC by regulating p53, FoxO, and HIF-1 signaling pathways and attenuating a series of metabolic processes, including glutathione and amino acids. As a unitary phototheranostic agent with a safe toxicological profile, the nanocrystal represents an effective way to circumvent the lack of therapeutic targets and the propensity of multisite metastatic progression in TNBC in a streamlined workflow of cancer management with an integrated image-guided intervention.
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Affiliation(s)
- Chunhua Zhao
- State Key Laboratory of Oncology in South China, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou 510060, China
| | - Zekun Liu
- State Key Laboratory of Oncology in South China, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou 510060, China
| | - Chia-Che Chang
- Department of Chemistry, Tunghai University, Taichung 40704, Taiwan
| | - Yi-Chia Chen
- Department of Chemistry, Tunghai University, Taichung 40704, Taiwan
| | - Qize Zhang
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Xiao-Dong Zhang
- Department of Physics and Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, School of Sciences, Tianjin University, Tianjin 300354, China
| | - Chrysafis Andreou
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
- Department of Electrical and Computer Engineering, University of Cyprus, Nicosia 1678, Cyprus
| | - Jiadong Pang
- State Key Laboratory of Oncology in South China, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou 510060, China
| | - Ze-Xian Liu
- State Key Laboratory of Oncology in South China, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou 510060, China
| | - Di-Yan Wang
- Department of Chemistry, Tunghai University, Taichung 40704, Taiwan
| | - Moritz F Kircher
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Jiang Yang
- State Key Laboratory of Oncology in South China, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou 510060, China
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
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5
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Voltà-Durán E, Parladé E, Serna N, Villaverde A, Vazquez E, Unzueta U. Endosomal escape for cell-targeted proteins. Going out after going in. Biotechnol Adv 2023; 63:108103. [PMID: 36702197 DOI: 10.1016/j.biotechadv.2023.108103] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 01/19/2023] [Accepted: 01/19/2023] [Indexed: 01/24/2023]
Abstract
Protein-based nanocarriers are versatile and biocompatible drug delivery systems. They are of particular interest in nanomedicine as they can recruit multiple functions in a single modular polypeptide. Many cell-targeting peptides or protein domains can promote cell uptake when included in these nanoparticles through receptor-mediated endocytosis. In that way, targeting drugs to specific cell receptors allows a selective intracellular delivery process, avoiding potential side effects of the payload. However, once internalized, the endo-lysosomal route taken by the engulfed material usually results in full degradation, preventing their adequate subcellular localization, bioavailability and subsequent therapeutic effect. Thus, entrapment into endo-lysosomes is a main bottleneck in the efficacy of protein-drug nanomedicines. Promoting endosomal escape and preventing lysosomal degradation would make this therapeutic approach clinically plausible. In this review, we discuss the mechanisms intended to evade lysosomal degradation of proteins, with the most relevant examples and associated strategies, and the methods available to measure that effect. In addition, based on the increasing catalogue of peptide domains tailored to face this challenge as components of protein nanocarriers, we emphasize how their particular mechanisms of action can potentially alter the functionality of accompanying protein materials, especially in terms of targeting and specificity in the delivery process.
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Affiliation(s)
- Eric Voltà-Durán
- Institut de Biotecnologia i de Biomedicina, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Spain; CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Instituto de Salud Carlos III, 08193 Cerdanyola del Vallès, Spain; Departament de Genètica i de Microbiologia, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Spain
| | - Eloi Parladé
- Institut de Biotecnologia i de Biomedicina, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Spain; CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Instituto de Salud Carlos III, 08193 Cerdanyola del Vallès, Spain; Departament de Genètica i de Microbiologia, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Spain
| | - Naroa Serna
- Institut de Biotecnologia i de Biomedicina, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Spain; CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Instituto de Salud Carlos III, 08193 Cerdanyola del Vallès, Spain; Departament de Genètica i de Microbiologia, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Spain
| | - Antonio Villaverde
- Institut de Biotecnologia i de Biomedicina, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Spain; CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Instituto de Salud Carlos III, 08193 Cerdanyola del Vallès, Spain; Departament de Genètica i de Microbiologia, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Spain.
| | - Esther Vazquez
- Institut de Biotecnologia i de Biomedicina, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Spain; CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Instituto de Salud Carlos III, 08193 Cerdanyola del Vallès, Spain; Departament de Genètica i de Microbiologia, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Spain.
| | - Ugutz Unzueta
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Instituto de Salud Carlos III, 08193 Cerdanyola del Vallès, Spain; Departament de Genètica i de Microbiologia, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Spain; Biomedical Research Institute Sant Pau (IIB Sant Pau), 08041 Barcelona, Spain; Josep Carreras Leukaemia Research Institute, 08916 Badalona, Spain.
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6
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Van de Vyver T, De Smedt SC, Raemdonck K. Modulating intracellular pathways to improve non-viral delivery of RNA therapeutics. Adv Drug Deliv Rev 2022; 181:114041. [PMID: 34763002 DOI: 10.1016/j.addr.2021.114041] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 10/12/2021] [Accepted: 11/02/2021] [Indexed: 12/12/2022]
Abstract
RNA therapeutics (e.g. siRNA, oligonucleotides, mRNA, etc.) show great potential for the treatment of a myriad of diseases. However, to reach their site of action in the cytosol or nucleus of target cells, multiple intra- and extracellular barriers have to be surmounted. Several non-viral delivery systems, such as nanoparticles and conjugates, have been successfully developed to meet this requirement. Unfortunately, despite these clear advances, state-of-the-art delivery agents still suffer from relatively low intracellular delivery efficiencies. Notably, our current understanding of the intracellular delivery process is largely oversimplified. Gaining mechanistic insight into how RNA formulations are processed by cells will fuel rational design of the next generation of delivery carriers. In addition, identifying which intracellular pathways contribute to productive RNA delivery could provide opportunities to boost the delivery performance of existing nanoformulations. In this review, we discuss both established as well as emerging techniques that can be used to assess the impact of different intracellular barriers on RNA transfection performance. Next, we highlight how several modulators, including small molecules but also genetic perturbation technologies, can boost RNA delivery by intervening at differing stages of the intracellular delivery process, such as cellular uptake, intracellular trafficking, endosomal escape, autophagy and exocytosis.
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Affiliation(s)
- Thijs Van de Vyver
- Ghent Research Group on Nanomedicines, Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium.
| | - Stefaan C De Smedt
- Ghent Research Group on Nanomedicines, Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium.
| | - Koen Raemdonck
- Ghent Research Group on Nanomedicines, Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium.
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7
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Yanagi T, Kaminaga K, Suzuki M, Abe H, Yamamoto H, Ohshima T, Kuwahata A, Sekino M, Imaoka T, Kakinuma S, Sugi T, Kada W, Hanaizumi O, Igarashi R. All-Optical Wide-Field Selective Imaging of Fluorescent Nanodiamonds in Cells, In Vivo and Ex Vivo. ACS NANO 2021; 15:12869-12879. [PMID: 34339180 DOI: 10.1021/acsnano.0c07740] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Fluorescence imaging is a critical tool to understand the spatial distribution of biomacromolecules in cells and in vivo, providing information on molecular dynamics and interactions. Numerous valuable insights into biological systems have been provided by the specific detection of various molecular species. However, molecule-selective detection is often hampered by background fluorescence, such as cell autofluorescence and fluorescence leakage from molecules stained by other dyes. Here we describe a method for all-optical selective imaging of fluorescent nanodiamonds containing nitrogen-vacancy centers (NVCs) for wide-field fluorescence bioimaging. The method is based on the fact that the fluorescence intensity of NVCs strictly depends on the configuration of ground-state electron spins, which can be controlled by changing the pulse recurrence intervals of microsecond excitation laser pulses. Therefore, by using regulated laser pulses, we can oscillate the fluorescence from NVCs in a nanodiamond, while oscillating other optical signals in the opposite phase to NVCs. As a result, we can reconstruct a selective image of a nanodiamond by using a series of oscillated fluorescence images. We demonstrate application of the method to the selective imaging of nanodiamonds in live cells, in microanimals, and on a hippocampal slice culture obtained from a rat. Our approach potentially enables us to achieve high-contrast images of nanodiamond-labeled biomolecules with a signal-to-background ratio improved by up to 100-fold over the standard fluorescence image, thereby providing a more powerful tool for the investigation of molecular dynamics in cells and in vivo.
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Affiliation(s)
- Tamami Yanagi
- Institute for Quantum Life Science, National Institutes for Quantum and Radiological Science and Technology, Inage-ku, Chiba 263-8555, Japan
- Division of Electronics and Informatics, Faculty of Science and Technology, Gunma University, Kiryu, Gunma 376-8515, Japan
| | - Kiichi Kaminaga
- Institute for Quantum Life Science, National Institutes for Quantum and Radiological Science and Technology, Inage-ku, Chiba 263-8555, Japan
- National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Inage-ku, Chiba 263-8555, Japan
| | - Michiyo Suzuki
- Institute for Quantum Life Science, National Institutes for Quantum and Radiological Science and Technology, Inage-ku, Chiba 263-8555, Japan
- Takasaki Advanced Radiation Research Institute, National Institutes for Quantum and Radiological Science and Technology, Takasaki, Gunma 370-1292, Japan
| | - Hiroshi Abe
- Institute for Quantum Life Science, National Institutes for Quantum and Radiological Science and Technology, Inage-ku, Chiba 263-8555, Japan
- Takasaki Advanced Radiation Research Institute, National Institutes for Quantum and Radiological Science and Technology, Takasaki, Gunma 370-1292, Japan
| | - Hiroki Yamamoto
- Institute for Quantum Life Science, National Institutes for Quantum and Radiological Science and Technology, Inage-ku, Chiba 263-8555, Japan
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Takeshi Ohshima
- Institute for Quantum Life Science, National Institutes for Quantum and Radiological Science and Technology, Inage-ku, Chiba 263-8555, Japan
- Takasaki Advanced Radiation Research Institute, National Institutes for Quantum and Radiological Science and Technology, Takasaki, Gunma 370-1292, Japan
| | - Akihiro Kuwahata
- Department of Electrical Engineering and Information Systems, The University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan
- Department of Electrical Engineering, Tohoku University, Sendai, Miyagi 980-8579, Japan
| | - Masaki Sekino
- Department of Electrical Engineering and Information Systems, The University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Tatsuhiko Imaoka
- Institute for Quantum Life Science, National Institutes for Quantum and Radiological Science and Technology, Inage-ku, Chiba 263-8555, Japan
- National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Inage-ku, Chiba 263-8555, Japan
| | - Shizuko Kakinuma
- Institute for Quantum Life Science, National Institutes for Quantum and Radiological Science and Technology, Inage-ku, Chiba 263-8555, Japan
- National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Inage-ku, Chiba 263-8555, Japan
| | - Takuma Sugi
- Program of Biomedical Science, Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-0046, Japan
| | - Wataru Kada
- Division of Electronics and Informatics, Faculty of Science and Technology, Gunma University, Kiryu, Gunma 376-8515, Japan
| | - Osamu Hanaizumi
- Division of Electronics and Informatics, Faculty of Science and Technology, Gunma University, Kiryu, Gunma 376-8515, Japan
| | - Ryuji Igarashi
- Institute for Quantum Life Science, National Institutes for Quantum and Radiological Science and Technology, Inage-ku, Chiba 263-8555, Japan
- National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Inage-ku, Chiba 263-8555, Japan
- JST, PRESTO, Kawaguchi, Saitama 332-0012, Japan
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8
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Larsen JB, Taebnia N, Dolatshahi-Pirouz A, Eriksen AZ, Hjørringgaard C, Kristensen K, Larsen NW, Larsen NB, Marie R, Mündler AK, Parhamifar L, Urquhart AJ, Weller A, Mortensen KI, Flyvbjerg H, Andresen TL. Imaging therapeutic peptide transport across intestinal barriers. RSC Chem Biol 2021; 2:1115-1143. [PMID: 34458827 PMCID: PMC8341777 DOI: 10.1039/d1cb00024a] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 06/09/2021] [Indexed: 12/14/2022] Open
Abstract
Oral delivery is a highly preferred method for drug administration due to high patient compliance. However, oral administration is intrinsically challenging for pharmacologically interesting drug classes, in particular pharmaceutical peptides, due to the biological barriers associated with the gastrointestinal tract. In this review, we start by summarizing the pharmacological performance of several clinically relevant orally administrated therapeutic peptides, highlighting their low bioavailabilities. Thus, there is a strong need to increase the transport of peptide drugs across the intestinal barrier to realize future treatment needs and further development in the field. Currently, progress is hampered by a lack of understanding of transport mechanisms that govern intestinal absorption and transport of peptide drugs, including the effects of the permeability enhancers commonly used to mediate uptake. We describe how, for the past decades, mechanistic insights have predominantly been gained using functional assays with end-point read-out capabilities, which only allow indirect study of peptide transport mechanisms. We then focus on fluorescence imaging that, on the other hand, provides opportunities to directly visualize and thus follow peptide transport at high spatiotemporal resolution. Consequently, it may provide new and detailed mechanistic understanding of the interplay between the physicochemical properties of peptides and cellular processes; an interplay that determines the efficiency of transport. We review current methodology and state of the art in the field of fluorescence imaging to study intestinal barrier transport of peptides, and provide a comprehensive overview of the imaging-compatible in vitro, ex vivo, and in vivo platforms that currently are being developed to accelerate this emerging field of research.
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Affiliation(s)
- Jannik Bruun Larsen
- Center for Intestinal Absorption and Transport of Biopharmaceuticals, Department of Health Technology, Technical University of Denmark DK-2800, Kgs. Lyngby Denmark
| | - Nayere Taebnia
- Center for Intestinal Absorption and Transport of Biopharmaceuticals, Department of Health Technology, Technical University of Denmark DK-2800, Kgs. Lyngby Denmark
| | - Alireza Dolatshahi-Pirouz
- Center for Intestinal Absorption and Transport of Biopharmaceuticals, Department of Health Technology, Technical University of Denmark DK-2800, Kgs. Lyngby Denmark
| | - Anne Zebitz Eriksen
- Center for Intestinal Absorption and Transport of Biopharmaceuticals, Department of Health Technology, Technical University of Denmark DK-2800, Kgs. Lyngby Denmark
| | - Claudia Hjørringgaard
- Center for Intestinal Absorption and Transport of Biopharmaceuticals, Department of Health Technology, Technical University of Denmark DK-2800, Kgs. Lyngby Denmark
| | - Kasper Kristensen
- Center for Intestinal Absorption and Transport of Biopharmaceuticals, Department of Health Technology, Technical University of Denmark DK-2800, Kgs. Lyngby Denmark
| | - Nanna Wichmann Larsen
- Center for Intestinal Absorption and Transport of Biopharmaceuticals, Department of Health Technology, Technical University of Denmark DK-2800, Kgs. Lyngby Denmark
| | - Niels Bent Larsen
- Center for Intestinal Absorption and Transport of Biopharmaceuticals, Department of Health Technology, Technical University of Denmark DK-2800, Kgs. Lyngby Denmark
| | - Rodolphe Marie
- Center for Intestinal Absorption and Transport of Biopharmaceuticals, Department of Health Technology, Technical University of Denmark DK-2800, Kgs. Lyngby Denmark
| | - Ann-Kathrin Mündler
- Center for Intestinal Absorption and Transport of Biopharmaceuticals, Department of Health Technology, Technical University of Denmark DK-2800, Kgs. Lyngby Denmark
| | - Ladan Parhamifar
- Center for Intestinal Absorption and Transport of Biopharmaceuticals, Department of Health Technology, Technical University of Denmark DK-2800, Kgs. Lyngby Denmark
| | - Andrew James Urquhart
- Center for Intestinal Absorption and Transport of Biopharmaceuticals, Department of Health Technology, Technical University of Denmark DK-2800, Kgs. Lyngby Denmark
| | - Arjen Weller
- Center for Intestinal Absorption and Transport of Biopharmaceuticals, Department of Health Technology, Technical University of Denmark DK-2800, Kgs. Lyngby Denmark
| | - Kim I Mortensen
- Center for Intestinal Absorption and Transport of Biopharmaceuticals, Department of Health Technology, Technical University of Denmark DK-2800, Kgs. Lyngby Denmark
| | - Henrik Flyvbjerg
- Center for Intestinal Absorption and Transport of Biopharmaceuticals, Department of Health Technology, Technical University of Denmark DK-2800, Kgs. Lyngby Denmark
| | - Thomas Lars Andresen
- Center for Intestinal Absorption and Transport of Biopharmaceuticals, Department of Health Technology, Technical University of Denmark DK-2800, Kgs. Lyngby Denmark
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9
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Garcia Romeu H, Deville S, Salvati A. Time- and Space-Resolved Flow-Cytometry of Cell Organelles to Quantify Nanoparticle Uptake and Intracellular Trafficking by Cells. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2100887. [PMID: 34272923 DOI: 10.1002/smll.202100887] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 06/15/2021] [Indexed: 05/20/2023]
Abstract
The design of targeted nanomedicines requires intracellular space- and time-resolved data of nanoparticle distribution following uptake. Current methods to study intracellular trafficking, such as dynamic colocalization by fluorescence microscopy in live cells, are usually low throughput and require extensive analysis of large datasets to quantify colocalization in several individual cells. Here a method based on flow cytometry to easily detect and characterize the organelles in which nanoparticles are internalized and trafficked over time is proposed. Conventional cell fractionation methods are combined with immunostaining and high-sensitivity organelle flow cytometry to get space-resolved data of nanoparticle intracellular distribution. By extracting the organelles at different times, time-resolved data of nanoparticle intracellular trafficking are obtained. The method is validated by determining how nanoparticle size affects the kinetics of arrival to the lysosomes. The results demonstrate that this method allows high-throughput analysis of nanoparticle uptake and intracellular trafficking by cells, therefore it can be used to determine how nanoparticle design affects their intracellular behavior.
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Affiliation(s)
- Hector Garcia Romeu
- Department of Nanomedicine & Drug Targeting, Groningen Research Institute of Pharmacy, University of Groningen, A. Deusinglaan 1, Groningen, 9713AV, The Netherlands
| | - Sarah Deville
- Department of Nanomedicine & Drug Targeting, Groningen Research Institute of Pharmacy, University of Groningen, A. Deusinglaan 1, Groningen, 9713AV, The Netherlands
- Health Unit, Flemish Institute for Technological Research, Boeretang 200, Mol, 2400, Belgium
| | - Anna Salvati
- Department of Nanomedicine & Drug Targeting, Groningen Research Institute of Pharmacy, University of Groningen, A. Deusinglaan 1, Groningen, 9713AV, The Netherlands
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10
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Gravely M, Roxbury D. Multispectral Fingerprinting Resolves Dynamics of Nanomaterial Trafficking in Primary Endothelial Cells. ACS NANO 2021; 15:12388-12404. [PMID: 34180232 DOI: 10.1021/acsnano.1c04500] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Intracellular vesicle trafficking involves a complex series of biological pathways used to sort, recycle, and degrade extracellular components, including engineered nanomaterials (ENMs) which gain cellular entry via active endocytic processes. A recent emphasis on routes of ENM uptake has established key physicochemical properties which direct certain mechanisms, yet relatively few studies have identified their effect on intracellular trafficking processes past entry and initial subcellular localization. Here, we developed and applied an approach where single-walled carbon nanotubes (SWCNTs) play a dual role-that of an ENM undergoing intracellular processing, in addition to functioning as the signal transduction element reporting these events in individual cells with single organelle resolution. We used the exceptional optical properties exhibited by noncovalent hybrids of single-stranded DNA and SWCNTs (DNA-SWCNTs) to report the progression of intracellular processing events via two orthogonal hyperspectral imaging approaches of near-infrared (NIR) fluorescence and resonance Raman scattering. A positive correlation between fluorescence and G-band intensities was uncovered within single cells, while exciton energy transfer and eventual aggregation of DNA-SWCNTs were observed to scale with increasing time after internalization. An analysis pipeline was developed to colocalize and deconvolute the fluorescence and Raman spectra of subcellular regions of interest (ROIs), allowing for single-chirality component spectra to be obtained with submicron spatial resolution. This approach uncovered correlations between DNA-SWCNT concentration, dielectric modulation, and irreversible aggregation within single intracellular vesicles. An immunofluorescence assay was designed to directly observe the DNA-SWCNTs in labeled endosomal vesicles, revealing a distinct relationship between the physical state of organelle-bound DNA-SWCNTs and the dynamic luminal conditions during endosomal maturation processes. Finally, we trained a machine learning algorithm to predict endosome type using the Raman spectra of the vesicle-bound DNA-SWCNTs, enabling major components in the endocytic pathway to be simultaneously visualized using a single intracellular reporter.
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Affiliation(s)
- Mitchell Gravely
- Department of Chemical Engineering, University of Rhode Island, Kingston, Rhode Island 02881, United States
| | - Daniel Roxbury
- Department of Chemical Engineering, University of Rhode Island, Kingston, Rhode Island 02881, United States
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11
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Vtyurina N, Åberg C, Salvati A. Imaging of nanoparticle uptake and kinetics of intracellular trafficking in individual cells. NANOSCALE 2021; 13:10436-10446. [PMID: 34076024 PMCID: PMC8211015 DOI: 10.1039/d1nr00901j] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 05/24/2021] [Indexed: 05/02/2023]
Abstract
Live cell imaging is a powerful tool to understand how nano-sized objects, such as the drug carriers used for nanomedicine applications, are taken up and trafficked by cells. Here we visualized human HeLa cells as they took up and trafficked nanoparticles of different sizes and quantified nanoparticle colocalization with different fluorescently-labelled intracellular compartments over time. This allowed us to obtain kinetic profiles of nanoparticle transport towards the lysosomes in individual cells. With a simple theoretical model, we determined the typical departure time of nanoparticles from the cell membrane and typical lysosome arrival time. We compared these kinetics parameters for nanoparticles of different sizes and determined how they vary in individual cells. We also performed a similar analysis for early endocytic compartments through which nanoparticles transit and discuss challenges in quantifying the colocalization in this case. The results show a high variability in intracellular trafficking kinetics between individual cells. Additionally, they help us to understand how nanoparticle properties affect their cellular uptake and intracellular distribution kinetics.
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Affiliation(s)
- Natalia Vtyurina
- Department of Nanomedicine & Drug Targeting, Groningen Research Institute of Pharmacy, University of Groningen, Antonius Deusinglaan 1, 9713AV Groningen, the Netherlands.
| | - Christoffer Åberg
- Department of Pharmaceutical Analysis, Groningen Research Institute of Pharmacy, University of Groningen, Antonius Deusinglaan 1, 9713AV Groningen, the Netherlands.
| | - Anna Salvati
- Department of Nanomedicine & Drug Targeting, Groningen Research Institute of Pharmacy, University of Groningen, Antonius Deusinglaan 1, 9713AV Groningen, the Netherlands.
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12
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Sousa de Almeida M, Susnik E, Drasler B, Taladriz-Blanco P, Petri-Fink A, Rothen-Rutishauser B. Understanding nanoparticle endocytosis to improve targeting strategies in nanomedicine. Chem Soc Rev 2021; 50:5397-5434. [PMID: 33666625 PMCID: PMC8111542 DOI: 10.1039/d0cs01127d] [Citation(s) in RCA: 335] [Impact Index Per Article: 111.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Indexed: 12/19/2022]
Abstract
Nanoparticles (NPs) have attracted considerable attention in various fields, such as cosmetics, the food industry, material design, and nanomedicine. In particular, the fast-moving field of nanomedicine takes advantage of features of NPs for the detection and treatment of different types of cancer, fibrosis, inflammation, arthritis as well as neurodegenerative and gastrointestinal diseases. To this end, a detailed understanding of the NP uptake mechanisms by cells and intracellular localization is essential for safe and efficient therapeutic applications. In the first part of this review, we describe the several endocytic pathways involved in the internalization of NPs and we discuss the impact of the physicochemical properties of NPs on this process. In addition, the potential challenges of using various inhibitors, endocytic markers and genetic approaches to study endocytosis are addressed along with the principal (semi) quantification methods of NP uptake. The second part focuses on synthetic and bio-inspired substances, which can stimulate or decrease the cellular uptake of NPs. This approach could be interesting in nanomedicine where a high accumulation of drugs in the target cells is desirable and clearance by immune cells is to be avoided. This review contributes to an improved understanding of NP endocytic pathways and reveals potential substances, which can be used in nanomedicine to improve NP delivery.
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Affiliation(s)
- Mauro Sousa de Almeida
- Adolphe Merkle Institute, University of FribourgChemin des Verdiers 41700 FribourgSwitzerland
| | - Eva Susnik
- Adolphe Merkle Institute, University of FribourgChemin des Verdiers 41700 FribourgSwitzerland
| | - Barbara Drasler
- Adolphe Merkle Institute, University of FribourgChemin des Verdiers 41700 FribourgSwitzerland
| | | | - Alke Petri-Fink
- Adolphe Merkle Institute, University of FribourgChemin des Verdiers 41700 FribourgSwitzerland
- Department of Chemistry, University of FribourgChemin du Musée 91700 FribourgSwitzerland
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13
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Åberg C. Kinetics of nanoparticle uptake into and distribution in human cells. NANOSCALE ADVANCES 2021; 3:2196-2212. [PMID: 36133761 PMCID: PMC9416924 DOI: 10.1039/d0na00716a] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Accepted: 03/12/2021] [Indexed: 05/17/2023]
Abstract
Whether one wishes to optimise drug delivery using nano-sized carriers or avoid hazard posed by engineered nanomaterials, the kinetics of nanoparticle uptake into human cells and their subsequent intracellular distribution is key. Unique properties of the nanoscale implies that such nanoparticles are taken up and trafficked in a different fashion compared to molecular species. In this review, we discuss in detail how to describe the kinetics of nanoparticle uptake and intracellular distribution, using previous studies for illustration. We also cover the extracellular kinetics, particle degradation, endosomal escape and cell division, ending with an outlook on the future of kinetic studies.
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Affiliation(s)
- Christoffer Åberg
- Groningen Research Institute of Pharmacy, University of Groningen Antonius Deusinglaan 1 9713AV Groningen The Netherlands
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14
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Raj EN, Lin Y, Chen C, Liu K, Chao J. Selective Autophagy Pathway of Nanoparticles and Nanodrugs: Drug Delivery and Pathophysiological Effects. ADVANCED THERAPEUTICS 2020. [DOI: 10.1002/adtp.202000085] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Emmanuel Naveen Raj
- Institute of Molecular Medicine and Bioengineering National Chiao Tung University Hsinchu 30068 Taiwan
- Department of Biological Science and Technology National Chiao Tung University Hsinchu 30068 Taiwan
| | - Yu‐Wei Lin
- Department of Biological Science and Technology National Chiao Tung University Hsinchu 30068 Taiwan
| | - Chien‐Hung Chen
- Department of Biological Science and Technology National Chiao Tung University Hsinchu 30068 Taiwan
| | - Kuang‐Kai Liu
- Department of Biological Science and Technology National Chiao Tung University Hsinchu 30068 Taiwan
| | - Jui‐I Chao
- Institute of Molecular Medicine and Bioengineering National Chiao Tung University Hsinchu 30068 Taiwan
- Department of Biological Science and Technology National Chiao Tung University Hsinchu 30068 Taiwan
- Center For Intelligent Drug Systems and Smart Bio‐devices National Chiao Tung University Hsinchu 30068 Taiwan
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15
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Zhang H, Rombouts K, Raes L, Xiong R, De Smedt SC, Braeckmans K, Remaut K. Fluorescence-Based Quantification of Messenger RNA and Plasmid DNA Decay Kinetics in Extracellular Biological Fluids and Cell Extracts. ACTA ACUST UNITED AC 2020; 4:e2000057. [PMID: 32402121 DOI: 10.1002/adbi.202000057] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Accepted: 02/26/2020] [Indexed: 12/22/2022]
Abstract
Extracellular and intracellular degradation of nucleic acids remains an issue in non-viral gene therapy. Understanding biodegradation is critical for the rational design of gene therapeutics in order to maintain stability and functionality at the target site. However, there are only limited methods available that allow determining the stability of genetic materials in biological environments. In this context, the decay kinetics of fluorescently labeled plasmid DNA (pDNA) and messenger RNA (mRNA) in undiluted biological samples (i.e., human serum, human ascites, bovine vitreous) and cell extracts is studied using fluorescence correlation spectroscopy (FCS) and single particle tracking (SPT). It is demonstrated that FCS is suitable to follow mRNA degradation, while SPT is better suited to investigate pDNA integrity. The half-life of mRNA and pDNA is ≈1-2 min and 1-4 h in biological samples, respectively. The resistance against biodegradation drastically improves by complexation with lipid-based carriers. Taken together, FCS and SPT are able to quantify the integrity of mRNA and pDNA, respectively, as a function of time, both in the extracellular biological fluids and cell extracts. This in turn allows to focus on the important but less understood issue of nucleic acids degradation in more detail and to rationally optimize gene delivery system as therapeutics.
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Affiliation(s)
- Heyang Zhang
- Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, 9000, Belgium
| | - Koen Rombouts
- Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, 9000, Belgium
| | - Laurens Raes
- Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, 9000, Belgium
| | - Ranhua Xiong
- Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, 9000, Belgium
| | - Stefaan C De Smedt
- Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, 9000, Belgium
| | - Kevin Braeckmans
- Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, 9000, Belgium
| | - Katrien Remaut
- Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, 9000, Belgium
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16
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Lan B, Wu J, Li N, Pan C, Yan L, Yang C, Zhang L, Yang L, Ren M. Hyperbranched cationic polysaccharide derivatives for efficient siRNA delivery and diabetic wound healing enhancement. Int J Biol Macromol 2020; 154:855-865. [PMID: 32198034 DOI: 10.1016/j.ijbiomac.2020.03.164] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Revised: 03/09/2020] [Accepted: 03/17/2020] [Indexed: 01/05/2023]
Abstract
Gene vectors are important for successful siRNA delivery. Four types of hyperbranched cationic polysaccharide derivatives (HCP) were synthesized by conjuncting 1,2-ethylenediamine (EDA) and diethylenetriamine (DETA) with glycogen or amylopectin respectively and named as G-EDA, G-DETA, A-EDA and A-DETA. The efficiency and safety of these HCPs to deliver siRNA were explored in vitro and in vivo. Our results showed that HCPs could form complexes with siRNA. All HCP/siRNA exhibited negligible cytotoxicity. Compared with A-EDA and A-DETA, G-EDA and G-DETA could carry much more siRNA into cells and then escape from endosomes. The delivery of MMP-9 siRNA (siMMP-9) by G-EDA and G-DETA significantly inhibited MMP-9 in HaCaT cells. Wound models in diabetic rats demonstrated that treatment of G-EDA/siMMP-9 could potently knock down MMP-9 of skin wound tissues and then enhanced wound healing. In summary, this study provided an effective and safe approach for siRNA delivery in vitro and in vivo.
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Affiliation(s)
- Biyun Lan
- Department of Endocrinology, Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou 510120, PR China
| | - Junfeng Wu
- DSAPM Lab and PCFM Lab, School of Materials Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, PR China
| | - Na Li
- Department of Endocrinology, Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou 510120, PR China
| | - Chenglin Pan
- DSAPM Lab and PCFM Lab, School of Materials Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, PR China
| | - Li Yan
- Department of Endocrinology, Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou 510120, PR China
| | - Chuan Yang
- Department of Endocrinology, Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou 510120, PR China
| | - Liming Zhang
- DSAPM Lab and PCFM Lab, School of Materials Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, PR China.
| | - Liqun Yang
- Department of Polymer and Material Science, School of Chemistry, Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, Guangdong Provincial Key Laboratory for High Performance Polymer-based Composites, Sun Yat-Sen University, Guangzhou 510275, PR China.
| | - Meng Ren
- Department of Endocrinology, Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou 510120, PR China.
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17
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Desai AS, Hunter MR, Kapustin AN. Using macropinocytosis for intracellular delivery of therapeutic nucleic acids to tumour cells. Philos Trans R Soc Lond B Biol Sci 2020; 374:20180156. [PMID: 30967005 DOI: 10.1098/rstb.2018.0156] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Nucleic acids are a rapidly emerging therapeutic modality with the potential to become the third major drug modality alongside antibodies and small molecules. Owing to the unfavourable physico-chemical characteristics of nucleic acids, such as large size and negative charge, intracellular delivery remains a fundamental challenge to realizing this potential. Delivery technologies such as lipids, polymers and peptides have been used to facilitate delivery, with many of the most successful technologies using macropinocytosis to gain cellular entry; mostly by default rather than design. Fundamental knowledge of macropinocytosis is rapidly growing, presenting opportunities to better tailor design strategies to target this pathway. Furthermore, certain types of tumour cells have been observed to have high levels of macropinocytic activity and traffic cargo to favourable destinations within the cell for endosomal release, providing unique opportunities to further use this entry route for drug delivery. In this article, we review the delivery systems reported to be taken up by macropinocytosis and what is known about the mechanisms for regulating macropinocytosis in tumour cells. From this analysis, we identify new opportunities for exploiting this pathway for the intracellular delivery of nucleic acids to tumour cells. This article is part of the Theo Murphy meeting issue 'Macropinocytosis'.
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Affiliation(s)
- Arpan S Desai
- AstraZeneca, IMED Biotech Unit, Pharmaceutical Sciences , Aaron Klug Building, Granta Park, Cambridge CB21 6GH , UK
| | - Morag R Hunter
- AstraZeneca, IMED Biotech Unit, Pharmaceutical Sciences , Aaron Klug Building, Granta Park, Cambridge CB21 6GH , UK
| | - Alexander N Kapustin
- AstraZeneca, IMED Biotech Unit, Pharmaceutical Sciences , Aaron Klug Building, Granta Park, Cambridge CB21 6GH , UK
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Abstract
Super-resolution microscopy, or nanoscopy, revolutionized the field of cell biology, enabling researchers to visualize cellular structures with nanometric resolution, single-molecule sensitivity, and in multiple colors. However, the impact of these techniques goes beyond biology as the fields of nanotechnology and nanomedicine can greatly benefit from them, as well. Nanoscopy can visualize nanostructures in vitro and in cells and can contribute to the characterization of their structures and nano-bio interactions. In this Perspective, we discuss the potential of super-resolution imaging for nanomedicine research, its technical challenges, and the future developments we envision for this technology.
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Affiliation(s)
- Silvia Pujals
- Institute
for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology Baldiri Reixac 15-21, 08028 Barcelona, Spain
| | - Lorenzo Albertazzi
- Institute
for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology Baldiri Reixac 15-21, 08028 Barcelona, Spain
- Department
of Biomedical Engineering and Institute for Complex Molecular Systems
(ICMS), Eindhoven University of Technology, 5612AZ Eindhoven, The Netherlands
- E-mail:
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19
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Wei W, Rosenkrans ZT, Luo QY, Lan X, Cai W. Exploiting Nanomaterial-mediated Autophagy for Cancer Therapy. SMALL METHODS 2019; 3:1800365. [PMID: 31355327 PMCID: PMC6660170 DOI: 10.1002/smtd.201800365] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Indexed: 05/14/2023]
Abstract
Autophagy is a conserved process that is critical for sequestering and degrading proteins, damaged or aged organelles, and for maintaining cellular homeostasis under stress conditions. Despite its dichotomous role in health and diseases, autophagy usually promotes growth and progression of advanced cancers. In this context, clinical trials using chloroquine and hydroxychloroquine as autophagy inhibitors have suggested that autophagy inhibition is a promising approach for treating advanced malignancies and/or overcoming drug resistance of small molecule therapeutics (i.e., chemotherapy and molecularly targeted therapy). Efficient delivery of autophagy inhibitors may further enhance the therapeutic effect, reduce systemic toxicity, and prevent drug resistance. As such, nanocarriers-based drug delivery systems have several distinct advantages over free autophagy inhibitors that include increased circulation of the drugs, reduced off-target systemic toxicity, increased drug delivery efficiency, and increased solubility and stability of the encapsulated drugs. With their versatile drug encapsulation and surface-functionalization capabilities, nanocarriers can be engineered to deliver autophagy inhibitors to tumor sites in a context-specific and/or tissue-specific manner. This review focuses on the role of nanomaterials utilizing autophagy inhibitors for cancer therapy, with a focus on their applications in different cancer types.
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Affiliation(s)
- Weijun Wei
- Department of Nuclear Medicine, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, 600 Yishan Road, Shanghai 200233, China
- Department of Radiology, University of Wisconsin - Madison, Madison, Wisconsin 53705, United States
| | - Zachary T. Rosenkrans
- School of Pharmacy, University of Wisconsin - Madison, Madison, Wisconsin 53705, United States
| | - Quan-Yong Luo
- Department of Nuclear Medicine, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, 600 Yishan Road, Shanghai 200233, China
| | - Xiaoli Lan
- Department of Nuclear Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
- Hubei Key Laboratory of Molecular Imaging, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Weibo Cai
- Department of Radiology, University of Wisconsin - Madison, Madison, Wisconsin 53705, United States
- School of Pharmacy, University of Wisconsin - Madison, Madison, Wisconsin 53705, United States
- Department of Medical Physics, University of Wisconsin - Madison, Madison, Wisconsin 53705, United State
- University of Wisconsin Carbone Cancer Center, Madison, Wisconsin 53705, United States
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20
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Desai D, Åkerfelt M, Prabhakar N, Toriseva M, Näreoja T, Zhang J, Nees M, Rosenholm JM. Factors Affecting Intracellular Delivery and Release of Hydrophilic Versus Hydrophobic Cargo from Mesoporous Silica Nanoparticles on 2D and 3D Cell Cultures. Pharmaceutics 2018; 10:E237. [PMID: 30453596 PMCID: PMC6320991 DOI: 10.3390/pharmaceutics10040237] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 11/13/2018] [Accepted: 11/15/2018] [Indexed: 12/27/2022] Open
Abstract
Intracellular drug delivery by mesoporous silica nanoparticles (MSNs) carrying hydrophilic and hydrophobic fluorophores as model drug cargo is demonstrated on 2D cellular and 3D tumor organoid level. Two different MSN designs, chosen on the basis of the characteristics of the loaded cargo, were used: MSNs with a surface-grown poly(ethylene imine), PEI, coating only for hydrophobic cargo and MSNs with lipid bilayers covalently coupled to the PEI layer as a diffusion barrier for hydrophilic cargo. First, the effect of hydrophobicity corresponding to loading degree (hydrophobic cargo) as well as surface charge (hydrophilic cargo) on intracellular drug release was studied on the cellular level. All incorporated agents were able to release to varying degrees from the endosomes into the cytoplasm in a loading degree (hydrophobic) or surface charge (hydrophilic) dependent manner as detected by live cell imaging. When administered to organotypic 3D tumor models, the hydrophilic versus hydrophobic cargo-carrying MSNs showed remarkable differences in labeling efficiency, which in this case also corresponds to drug delivery efficacy in 3D. The obtained results could thus indicate design aspects to be taken into account for the development of efficacious intracellular drug delivery systems, especially in the translation from standard 2D culture to more biologically relevant organotypic 3D cultures.
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Affiliation(s)
- Diti Desai
- Pharmaceutical Sciences Laboratory, Faculty of Science and Engineering, Åbo Akademi University, 20521 Turku, Finland.
| | - Malin Åkerfelt
- Institute of Biomedicine, University of Turku, 20520 Turku, Finland.
| | - Neeraj Prabhakar
- Pharmaceutical Sciences Laboratory, Faculty of Science and Engineering, Åbo Akademi University, 20521 Turku, Finland.
- Cell Biology, Faculty of Science and Engineering, Åbo Akademi University, 20521 Turku, Finland.
| | - Mervi Toriseva
- Institute of Biomedicine, University of Turku, 20520 Turku, Finland.
| | - Tuomas Näreoja
- Department of Laboratory Medicine, Division of Pathology, Karolinska Institute, 14186 Stockholm, Sweden.
| | - Jixi Zhang
- College of Bioengineering, Chongqing University, Chongqing 400044, China.
| | - Matthias Nees
- Institute of Biomedicine, University of Turku, 20520 Turku, Finland.
| | - Jessica M Rosenholm
- Pharmaceutical Sciences Laboratory, Faculty of Science and Engineering, Åbo Akademi University, 20521 Turku, Finland.
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21
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Parveen N, Borrenberghs D, Rocha S, Hendrix J. Single Viruses on the Fluorescence Microscope: Imaging Molecular Mobility, Interactions and Structure Sheds New Light on Viral Replication. Viruses 2018; 10:E250. [PMID: 29748498 PMCID: PMC5977243 DOI: 10.3390/v10050250] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Revised: 04/24/2018] [Accepted: 05/04/2018] [Indexed: 12/13/2022] Open
Abstract
Viruses are simple agents exhibiting complex reproductive mechanisms. Decades of research have provided crucial basic insights, antiviral medication and moderately successful gene therapy trials. The most infectious viral particle is, however, not always the most abundant one in a population, questioning the utility of classic ensemble-averaging virology. Indeed, viral replication is often not particularly efficient, prone to errors or containing parallel routes. Here, we review different single-molecule sensitive fluorescence methods that we employ routinely to investigate viruses. We provide a brief overview of the microscopy hardware needed and discuss the different methods and their application. In particular, we review how we applied (i) single-molecule Förster resonance energy transfer (smFRET) to probe the subviral human immunodeficiency virus (HIV-1) integrase (IN) quaternary structure; (ii) single particle tracking to study interactions of the simian virus 40 with membranes; (iii) 3D confocal microscopy and smFRET to quantify the HIV-1 pre-integration complex content and quaternary structure; (iv) image correlation spectroscopy to quantify the cytosolic HIV-1 Gag assembly, and finally; (v) super-resolution microscopy to characterize the interaction of HIV-1 with tetherin during assembly. We hope this review is an incentive for setting up and applying similar single-virus imaging studies in daily virology practice.
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Affiliation(s)
- Nagma Parveen
- Laboratory for Photochemistry and Spectroscopy, Molecular Imaging and Photonics Division, Chemistry Department, KU Leuven, B-3001 Leuven, Belgium.
| | - Doortje Borrenberghs
- Laboratory for Photochemistry and Spectroscopy, Molecular Imaging and Photonics Division, Chemistry Department, KU Leuven, B-3001 Leuven, Belgium.
| | - Susana Rocha
- Laboratory for Photochemistry and Spectroscopy, Molecular Imaging and Photonics Division, Chemistry Department, KU Leuven, B-3001 Leuven, Belgium.
| | - Jelle Hendrix
- Laboratory for Photochemistry and Spectroscopy, Molecular Imaging and Photonics Division, Chemistry Department, KU Leuven, B-3001 Leuven, Belgium.
- Dynamic Bioimaging Lab, Advanced Optical Microscopy Centre and Biomedical Research Institute (BIOMED), Hasselt University, B-3590 Diepenbeek, Belgium.
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22
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Almulathanon AAY, Ranucci E, Ferruti P, Garnett MC, Bosquillon C. Comparison of Gene Transfection and Cytotoxicity Mechanisms of Linear Poly(amidoamine) and Branched Poly(ethyleneimine) Polyplexes. Pharm Res 2018. [PMID: 29516282 DOI: 10.1007/s11095-017-2328-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
PURPOSE This study aimed to further explore the mechanisms behind the ability of certain linear polyamidoamines (PAAs) to transfect cells with minimal cytotoxicity. METHODS The transfection efficiency of DNA complexed with a PAA of a molecular weight over 10 kDa or 25 kDa branched polyethyleneimine (BPEI) was compared in A549 cells using a luciferase reporter gene assay. The impact of endo/lysosomal escape on transgene expression was investigated by transfecting cells in presence of bafilomycin A1 or chloroquine. Cytotoxicity caused by the vectors was evaluated by measuring cell metabolic activity, lactate dehydrogenase release, formation of reactive oxygen species and changes in mitochondrial membrane potential. RESULTS The luciferase activity was ~3-fold lower after transfection with PAA polyplexes than with BPEI complexes at the optimal polymer to nucleotide ratio (RU:Nt). However, in contrast to BPEI vectors, PAA polyplexes caused negligible cytotoxic effects. The transfection efficiency of PAA polyplexes was significantly reduced in presence of bafilomycin A1 while chloroquine enhanced or decreased transgene expression depending on the RU:Nt. CONCLUSIONS PAA polyplexes displayed a pH-dependent endo/lysosomal escape which was not associated with cytotoxic events, unlike observed with BPEI polyplexes. This is likely due to their greater interactions with biological membranes at acidic than neutral pH.
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Affiliation(s)
- Ammar A Y Almulathanon
- Division of Molecular Therapeutics and Formulation, School of Pharmacy, University of Nottingham, University Park, Nottingham, NG7 2RD, UK.,Pharmacy College,, University of Mosul,, Mosul, Iraq
| | - Elisabetta Ranucci
- Dipartimento di Chimica,, Università degli Studi di Milano, via C. Golgi 19, 20133, Milan, Italy
| | - Paolo Ferruti
- Dipartimento di Chimica,, Università degli Studi di Milano, via C. Golgi 19, 20133, Milan, Italy
| | - Martin C Garnett
- Division of Molecular Therapeutics and Formulation, School of Pharmacy, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
| | - Cynthia Bosquillon
- Division of Molecular Therapeutics and Formulation, School of Pharmacy, University of Nottingham, University Park, Nottingham, NG7 2RD, UK.
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23
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Chen G, Wang K, Wang Y, Wu P, Sun M, Oupický D. Fluorination Enhances Serum Stability of Bioreducible Poly(amido amine) Polyplexes and Enables Efficient Intravenous siRNA Delivery. Adv Healthc Mater 2018; 7. [PMID: 29280311 DOI: 10.1002/adhm.201700978] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Revised: 11/04/2017] [Indexed: 01/09/2023]
Abstract
The use of small interfering RNA (siRNA) in cancer treatment has been limited by the lack of effective systemic delivery methods. Although synthetic polycations have been widely explored in siRNA delivery, polycation/siRNA polyplexes often suffer from insufficient stability in vivo. Here, rationally designed siRNA delivery systems that meet the requirements for systemic siRNA delivery to distant tumors are reported. The hypothesis that modular design of delivery systems based on poly(amido amine)s that combine fluorination for systemic stability with bioreducibility for easy intracellular siRNA release, and PEGylation for improved safety and colloidal stability will overcome problems with contradicting siRNA delivery demands is tested. PEGylated, fluorinated, and bioreducible copolymers (PEG-PCD-F) with different degree of fluorination are thus synthesized. The fluorinated copolymers readily formed polyplexes with siRNA and achieved greatly improved gene silencing efficacy in multiple cell lines in vitro when compared with nonfluorinated controls. The results show fluorination-induced enhancement of stability, cellular uptake, and endosomal escape of the polyplexes, while exhibiting efficient siRNA release in reducing intracellular environment. PEG-PCD-F polyplexes with siRNA against Bcl2 inhibit breast tumor growth following systemic intravenous administration. The results provide strong evidence of successful combination of bioreducibility with fluorination and PEGylation to achieve systemic siRNA polyplex delivery.
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Affiliation(s)
- Gang Chen
- State Key Laboratory of Natural Medicines; Department of Pharmaceutics; China Pharmaceutical University; Nanjing 210009 China
| | - Kaikai Wang
- State Key Laboratory of Natural Medicines; Department of Pharmaceutics; China Pharmaceutical University; Nanjing 210009 China
| | - Yixin Wang
- State Key Laboratory of Natural Medicines; Department of Pharmaceutics; China Pharmaceutical University; Nanjing 210009 China
| | - Pengkai Wu
- State Key Laboratory of Natural Medicines; Department of Pharmaceutics; China Pharmaceutical University; Nanjing 210009 China
| | - Minjie Sun
- State Key Laboratory of Natural Medicines; Department of Pharmaceutics; China Pharmaceutical University; Nanjing 210009 China
| | - David Oupický
- State Key Laboratory of Natural Medicines; Department of Pharmaceutics; China Pharmaceutical University; Nanjing 210009 China
- Center for Drug Delivery and Nanomedicine; Department of Pharmaceutical Sciences; University of Nebraska Medical Center; Omaha NE 68198 USA
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24
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Sayers EJ, Magnusson JP, Moody PR, Mastrotto F, Conte C, Brazzale C, Borri P, Caliceti P, Watson P, Mantovani G, Aylott J, Salmaso S, Jones AT, Alexander C. Switching of Macromolecular Ligand Display by Thermoresponsive Polymers Mediates Endocytosis of Multiconjugate Nanoparticles. Bioconjug Chem 2018; 29:1030-1046. [DOI: 10.1021/acs.bioconjchem.7b00704] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Edward J. Sayers
- Cardiff School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Redwood Building, King Edward VII Ave, Cardiff CF10 3NB, United Kingdom
| | - Johannes P. Magnusson
- School of Pharmacy, University of Nottingham, University Park, Nottingham NG72RD, United Kingdom
| | - Paul R. Moody
- Cardiff School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Redwood Building, King Edward VII Ave, Cardiff CF10 3NB, United Kingdom
| | - Francesca Mastrotto
- School of Pharmacy, University of Nottingham, University Park, Nottingham NG72RD, United Kingdom
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Via Marzolo, 5, 35131 Padova, Italy
| | - Claudia Conte
- School of Pharmacy, University of Nottingham, University Park, Nottingham NG72RD, United Kingdom
| | - Chiara Brazzale
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Via Marzolo, 5, 35131 Padova, Italy
| | - Paola Borri
- School of Biosciences, Cardiff University, The Sir Martin Evans Building, Museum Avenue, Cardiff CF10 3AX, United Kingdom
| | - Paolo Caliceti
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Via Marzolo, 5, 35131 Padova, Italy
| | - Peter Watson
- School of Biosciences, Cardiff University, The Sir Martin Evans Building, Museum Avenue, Cardiff CF10 3AX, United Kingdom
| | - Giuseppe Mantovani
- School of Pharmacy, University of Nottingham, University Park, Nottingham NG72RD, United Kingdom
| | - Jonathan Aylott
- School of Pharmacy, University of Nottingham, University Park, Nottingham NG72RD, United Kingdom
| | - Stefano Salmaso
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Via Marzolo, 5, 35131 Padova, Italy
| | - Arwyn T. Jones
- Cardiff School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Redwood Building, King Edward VII Ave, Cardiff CF10 3NB, United Kingdom
| | - Cameron Alexander
- School of Pharmacy, University of Nottingham, University Park, Nottingham NG72RD, United Kingdom
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25
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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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26
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Digiacomo L, Cardarelli F, Pozzi D, Palchetti S, Digman MA, Gratton E, Capriotti AL, Mahmoudi M, Caracciolo G. An apolipoprotein-enriched biomolecular corona switches the cellular uptake mechanism and trafficking pathway of lipid nanoparticles. NANOSCALE 2017; 9:17254-17262. [PMID: 29115333 PMCID: PMC5700750 DOI: 10.1039/c7nr06437c] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Following exposure to biological milieus (e.g. after systemic administration), nanoparticles (NPs) get covered by an outer biomolecular corona (BC) that defines many of their biological outcomes, such as the elicited immune response, biodistribution, and targeting abilities. In spite of this, the role of BC in regulating the cellular uptake and the subcellular trafficking properties of NPs has remained elusive. Here, we tackle this issue by employing multicomponent (MC) lipid NPs, human plasma (HP) and HeLa cells as models for nanoformulations, biological fluids, and target cells, respectively. By conducting confocal fluorescence microscopy experiments and image correlation analyses, we quantitatively demonstrate that the BC promotes a neat switch of the cell entry mechanism and subsequent intracellular trafficking, from macropinocytosis to clathrin-dependent endocytosis. Nano-liquid chromatography tandem mass spectrometry identifies apolipoproteins as the most abundant components of the BC tested here. Interestingly, this class of proteins target the LDL receptors, which are overexpressed in clathrin-enriched membrane domains. Our results highlight the crucial role of BC as an intrinsic trigger of specific NP-cell interactions and biological responses and set the basis for a rational exploitation of the BC for targeted delivery.
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Affiliation(s)
- L. 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
| | - F. Cardarelli
- NEST, Istituto Nanoscienze, CNR and Scuola Normale Superiore, Piazza San Silvestro 12, Pisa, Italy
| | - D. Pozzi
- Department of Molecular Medicine, Sapienza University of Rome, Viale Regina Elena 291, 00161 Rome, Italy
| | - S. Palchetti
- Department of Molecular Medicine, Sapienza University of Rome, Viale Regina Elena 291, 00161 Rome, Italy
| | - M. A. Digman
- Laboratory for Fluorescence Dynamics, Biomedical Engineering Department, University of California Irvine, CA 92697, USA
| | - E. Gratton
- Laboratory for Fluorescence Dynamics, Biomedical Engineering Department, University of California Irvine, CA 92697, USA
| | - A. L. Capriotti
- Department of Chemistry, Sapienza University of Rome, P.le Aldo Moro 5, 00185 Rome, Italy
| | - M. Mahmoudi
- Department of Anesthesiology, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02115, USA
- Nanotechnology Research Centre, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran 13169-43551, Iran
| | - G. Caracciolo
- Department of Molecular Medicine, Sapienza University of Rome, Viale Regina Elena 291, 00161 Rome, Italy
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27
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Aoyama M, Yoshioka Y, Arai Y, Hirai H, Ishimoto R, Nagano K, Higashisaka K, Nagai T, Tsutsumi Y. Intracellular trafficking of particles inside endosomal vesicles is regulated by particle size. J Control Release 2017; 260:183-193. [DOI: 10.1016/j.jconrel.2017.06.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Revised: 05/10/2017] [Accepted: 06/11/2017] [Indexed: 02/04/2023]
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28
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Manshian BB, Martens TF, Kantner K, Braeckmans K, De Smedt SC, Demeester J, Jenkins GJS, Parak WJ, Pelaz B, Doak SH, Himmelreich U, Soenen SJ. The role of intracellular trafficking of CdSe/ZnS QDs on their consequent toxicity profile. J Nanobiotechnology 2017; 15:45. [PMID: 28619032 PMCID: PMC5472855 DOI: 10.1186/s12951-017-0279-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Accepted: 06/06/2017] [Indexed: 11/21/2022] Open
Abstract
Background Nanoparticle interactions with cellular membranes and the kinetics of their transport and localization are important determinants of their functionality and their biological consequences. Understanding these phenomena is fundamental for the translation of such NPs from in vitro to in vivo systems for bioimaging and medical applications. Two CdSe/ZnS quantum dots (QD) with differing surface functionality (NH2 or COOH moieties) were used here for investigating the intracellular uptake and transport kinetics of these QDs. Results In water, the COOH- and NH2-QDs were negatively and positively charged, respectively, while in serum-containing medium the NH2-QDs were agglomerated, whereas the COOH-QDs remained dispersed. Though intracellular levels of NH2- and COOH-QDs were very similar after 24 h exposure, COOH-QDs appeared to be continuously internalised and transported by endosomes and lysosomes, while NH2-QDs mainly remained in the lysosomes. The results of (intra)cellular QD trafficking were correlated to their toxicity profiles investigating levels of reactive oxygen species (ROS), mitochondrial ROS, autophagy, changes to cellular morphology and alterations in genes involved in cellular stress, toxicity and cytoskeletal integrity. The continuous flux of COOH-QDs perhaps explains their higher toxicity compared to the NH2-QDs, mainly resulting in mitochondrial ROS and cytoskeletal remodelling which are phenomena that occur early during cellular exposure. Conclusions Together, these data reveal that although cellular QD levels were similar after 24 h, differences in the nature and extent of their cellular trafficking resulted in differences in consequent gene alterations and toxicological effects. Electronic supplementary material The online version of this article (doi:10.1186/s12951-017-0279-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Bella B Manshian
- Biomedical NMR Unit/MoSAIC, KU Leuven Campus Gasthuisberg, Herestraat 49, 3000, Louvain, Belgium. .,Institute of Life Science, Swansea University Medical School, Singleton Park, Swansea, SA2 8PP, UK.
| | - Thomas F Martens
- Faculty of Pharmaceutical Sciences, Ghent University, Harelbekestraat 72, 9000, Ghent, Belgium.,Center of Nano- and Biophotonics, Ghent University, Harelbekestraat 72, 9000, Ghent, Belgium
| | - Karsten Kantner
- Philipps University of Marburg, Renthof 7, 35032, Marburg, Germany
| | - Kevin Braeckmans
- Faculty of Pharmaceutical Sciences, Ghent University, Harelbekestraat 72, 9000, Ghent, Belgium.,Center of Nano- and Biophotonics, Ghent University, Harelbekestraat 72, 9000, Ghent, Belgium
| | - Stefaan C De Smedt
- Faculty of Pharmaceutical Sciences, Ghent University, Harelbekestraat 72, 9000, Ghent, Belgium
| | - Jo Demeester
- Faculty of Pharmaceutical Sciences, Ghent University, Harelbekestraat 72, 9000, Ghent, Belgium
| | - Gareth J S Jenkins
- Institute of Life Science, Swansea University Medical School, Singleton Park, Swansea, SA2 8PP, UK
| | - Wolfgang J Parak
- Philipps University of Marburg, Renthof 7, 35032, Marburg, Germany.,CICBiomagune, San Sebastian, Spain
| | - Beatriz Pelaz
- Philipps University of Marburg, Renthof 7, 35032, Marburg, Germany
| | - Shareen H Doak
- Institute of Life Science, Swansea University Medical School, Singleton Park, Swansea, SA2 8PP, UK
| | - Uwe Himmelreich
- Biomedical NMR Unit/MoSAIC, KU Leuven Campus Gasthuisberg, Herestraat 49, 3000, Louvain, Belgium
| | - Stefaan J Soenen
- Biomedical NMR Unit/MoSAIC, KU Leuven Campus Gasthuisberg, Herestraat 49, 3000, Louvain, Belgium
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29
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Ubiquitylation of p62/sequestosome1 activates its autophagy receptor function and controls selective autophagy upon ubiquitin stress. Cell Res 2017; 27:657-674. [PMID: 28322253 DOI: 10.1038/cr.2017.40] [Citation(s) in RCA: 129] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 12/06/2016] [Accepted: 01/22/2017] [Indexed: 12/16/2022] Open
Abstract
Alterations in cellular ubiquitin (Ub) homeostasis, known as Ub stress, feature and affect cellular responses in multiple conditions, yet the underlying mechanisms are incompletely understood. Here we report that autophagy receptor p62/sequestosome-1 interacts with E2 Ub conjugating enzymes, UBE2D2 and UBE2D3. Endogenous p62 undergoes E2-dependent ubiquitylation during upregulation of Ub homeostasis, a condition termed as Ub+ stress, that is intrinsic to Ub overexpression, heat shock or prolonged proteasomal inhibition by bortezomib, a chemotherapeutic drug. Ubiquitylation of p62 disrupts dimerization of the UBA domain of p62, liberating its ability to recognize polyubiquitylated cargoes for selective autophagy. We further demonstrate that this mechanism might be critical for autophagy activation upon Ub+ stress conditions. Delineation of the mechanism and regulatory roles of p62 in sensing Ub stress and controlling selective autophagy could help to understand and modulate cellular responses to a variety of endogenous and environmental challenges, potentially opening a new avenue for the development of therapeutic strategies against autophagy-related maladies.
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30
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Palchetti S, Pozzi D, Marchini C, Amici A, Andreani C, Bartolacci C, Digiacomo L, Gambini V, Cardarelli F, Di Rienzo C, Peruzzi G, Amenitsch H, Palermo R, Screpanti I, Caracciolo G. Manipulation of lipoplex concentration at the cell surface boosts transfection efficiency in hard-to-transfect cells. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2017; 13:681-691. [DOI: 10.1016/j.nano.2016.08.019] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2016] [Revised: 08/03/2016] [Accepted: 08/11/2016] [Indexed: 11/25/2022]
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31
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Spatial and Structural Metrics for Living Cells Inspired by Statistical Mechanics. Sci Rep 2016; 6:34457. [PMID: 27708351 PMCID: PMC5052623 DOI: 10.1038/srep34457] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Accepted: 09/05/2016] [Indexed: 01/07/2023] Open
Abstract
Experimental observations in cell biology have advanced to a stage where theory could play a larger role, much as it has done in the physical sciences. Possibly the lack of a common framework within which experimentalists, computational scientists and theorists could equally contribute has hindered this development, for the worse of both disciplines. Here we demonstrate the usage of tools and concepts from statistical mechanics to describe processes inside living cells based on experimental data, suggesting that future theoretical/computational models may be based on such concepts. To illustrate the ideas, we describe the organisation of subcellular structures within the cell in terms of (density) pair correlation functions, and subsequently use the same concepts to follow nano-sized objects being transported inside the cell. Finally, we quantify an interesting subcellular re-organisation, not previously discerned by molecular biology methods.
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32
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Tiffany M, Szoka FC. Co-localization of fluorescent labeled lipid nanoparticles with specifically tagged subcellular compartments by single particle tracking at low nanoparticle to cell ratios. J Drug Target 2016; 24:857-864. [DOI: 10.1080/1061186x.2016.1233976] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Matthew Tiffany
- Department of Bioengineering, Therapeutic Sciences and Pharmaceutical Chemistry, University of California, San Francisco, CA, USA
- Department of Pediatrics and Genetics, Stanford University School of Medicine, Stanford, CA, USA
| | - Francis C. Szoka
- Department of Bioengineering, Therapeutic Sciences and Pharmaceutical Chemistry, University of California, San Francisco, CA, USA
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33
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Wu L, Xu F, Reinhard BM. Nanoconjugation prolongs endosomal signaling of the epidermal growth factor receptor and enhances apoptosis. NANOSCALE 2016; 8:13755-68. [PMID: 27378391 PMCID: PMC5081566 DOI: 10.1039/c6nr02974d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
It is becoming increasingly clear that intracellular signaling can be subject to strict spatial control. As the covalent attachment of a signaling ligand to a nanoparticle (NP) impacts ligand-receptor binding, uptake, and trafficking, nanoconjugation provides new opportunities for manipulating intracellular signaling in a controlled fashion. To establish the effect of nanoconjugation on epidermal growth factor (EGF) mediated signaling, we investigate here the intracellular fate of nanoconjugated EGF (NP-EGF) and its bound receptor (EGFR) by quantitative correlated darkfield/fluorescence microscopy and density-based endosomal fractionation. We demonstrate that nanoconjugation prolongs the dwell time of phosphorylated receptors in the early endosomes and that the retention of activated EGFR in the early endosomes is accompanied by an EGF mediated apoptosis at effective concentrations that do not induce apoptosis in the case of free EGF. Overall, these findings indicate nanoconjugation as a rational strategy for modifying signaling that acts by modulating the temporo-spatial distribution of the activated EGF-EGFR ligand-receptor complex.
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Affiliation(s)
- L Wu
- Department of Chemistry and The Photonics Center, Boston University, Boston, MA 02215, USA.
| | - F Xu
- Department of Chemistry and The Photonics Center, Boston University, Boston, MA 02215, USA.
| | - B M Reinhard
- Department of Chemistry and The Photonics Center, Boston University, Boston, MA 02215, USA.
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34
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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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35
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Rosazza C, Deschout H, Buntz A, Braeckmans K, Rols MP, Zumbusch A. Endocytosis and Endosomal Trafficking of DNA After Gene Electrotransfer In Vitro. MOLECULAR THERAPY-NUCLEIC ACIDS 2016; 5:e286. [PMID: 26859199 PMCID: PMC4884790 DOI: 10.1038/mtna.2015.59] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 12/18/2015] [Indexed: 01/08/2023]
Abstract
DNA electrotransfer is a successful technique for gene delivery into cells and represents an attractive alternative to virus-based methods for clinical applications including gene therapy and DNA vaccination. However, little is currently known about the mechanisms governing DNA internalization and its fate inside cells. The objectives of this work were to investigate the role of endocytosis and to quantify the contribution of different routes of cellular trafficking during DNA electrotransfer. To pursue these objectives, we performed flow cytometry and single-particle fluorescence microscopy experiments using inhibitors of endocytosis and endosomal markers. Our results show that ~50% of DNA is internalized by caveolin/raft-mediated endocytosis, 25% by clathrin-mediated endocytosis, and 25% by macropinocytosis. During active transport, DNA is routed through multiple endosomal compartments with, in the hour following electrotransfer, 70% found in Rab5 structures, 50% in Rab11-containing organelles and 30% in Rab9 compartments. Later, 60% of DNA colocalizes with Lamp1 vesicles. Because these molecular markers can overlap while following organelles through several steps of trafficking, the percentages do not sum up to 100%. We conclude that electrotransferred DNA uses the classical endosomal trafficking pathways. Our results are important for a generalized understanding of gene electrotransfer, which is crucial for its safe use in clinics.
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Affiliation(s)
- Christelle Rosazza
- Department of Chemistry, University of Konstanz, Konstanz, Germany.,Department of Structural Biology and Biophysics, Institute of Pharmacology and Structural Biology (IPBS), CNRS UMR5089, Toulouse, France.,University of Toulouse III, UPS, Toulouse, France
| | - Hendrik Deschout
- Laboratory of General Biochemistry and Physical Pharmacy, Department of Pharmaceutics, University of Ghent, Ghent, Belgium
| | - Annette Buntz
- Department of Chemistry, University of Konstanz, Konstanz, Germany
| | - Kevin Braeckmans
- Laboratory of General Biochemistry and Physical Pharmacy, Department of Pharmaceutics, University of Ghent, Ghent, Belgium
| | - Marie-Pierre Rols
- Department of Structural Biology and Biophysics, Institute of Pharmacology and Structural Biology (IPBS), CNRS UMR5089, Toulouse, France.,University of Toulouse III, UPS, Toulouse, France
| | - Andreas Zumbusch
- Department of Chemistry, University of Konstanz, Konstanz, Germany
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36
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Ghosh D, Pinto S, Danglot L, Vandewauw I, Segal A, Van Ranst N, Benoit M, Janssens A, Vennekens R, Vanden Berghe P, Galli T, Vriens J, Voets T. VAMP7 regulates constitutive membrane incorporation of the cold-activated channel TRPM8. Nat Commun 2016; 7:10489. [PMID: 26843440 PMCID: PMC4742910 DOI: 10.1038/ncomms10489] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Accepted: 12/18/2015] [Indexed: 02/06/2023] Open
Abstract
The cation channel TRPM8 plays a central role in the somatosensory system, as a key sensor of innocuously cold temperatures and cooling agents. Although increased functional expression of TRPM8 has been implicated in various forms of pathological cold hypersensitivity, little is known about the cellular and molecular mechanisms that determine TRPM8 abundance at the plasma membrane. Here we demonstrate constitutive transport of TRPM8 towards the plasma membrane in atypical, non-acidic transport vesicles that contain lysosomal-associated membrane protein 1 (LAMP1), and provide evidence that vesicle-associated membrane protein 7 (VAMP7) mediates fusion of these vesicles with the plasma membrane. In line herewith, VAMP7-deficient mice exhibit reduced functional expression of TRPM8 in sensory neurons and concomitant deficits in cold avoidance and icilin-induced cold hypersensitivity. Our results uncover a cellular pathway that controls functional plasma membrane incorporation of a temperature-sensitive TRP channel, and thus regulates thermosensitivity in vivo.
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Affiliation(s)
- Debapriya Ghosh
- Laboratory of Ion Channel Research and TRP Channel Research Platform Leuven (TRPLe), Department of Cellular and Molecular Medicine, University of Leuven, Herestraat 49 box 802, B-3000 Leuven, Belgium
| | - Silvia Pinto
- Laboratory of Ion Channel Research and TRP Channel Research Platform Leuven (TRPLe), Department of Cellular and Molecular Medicine, University of Leuven, Herestraat 49 box 802, B-3000 Leuven, Belgium
| | - Lydia Danglot
- Institut Jacques Monod, CNRS UMR 7592, University of Paris Diderot, F-75013 Paris, France
- INSERM ERL U950, Membrane Traffic in Health & disease Group, F-75013 Paris, France
| | - Ine Vandewauw
- Laboratory of Ion Channel Research and TRP Channel Research Platform Leuven (TRPLe), Department of Cellular and Molecular Medicine, University of Leuven, Herestraat 49 box 802, B-3000 Leuven, Belgium
| | - Andrei Segal
- Laboratory of Ion Channel Research and TRP Channel Research Platform Leuven (TRPLe), Department of Cellular and Molecular Medicine, University of Leuven, Herestraat 49 box 802, B-3000 Leuven, Belgium
| | - Nele Van Ranst
- Laboratory of Ion Channel Research and TRP Channel Research Platform Leuven (TRPLe), Department of Cellular and Molecular Medicine, University of Leuven, Herestraat 49 box 802, B-3000 Leuven, Belgium
| | - Melissa Benoit
- Laboratory of Ion Channel Research and TRP Channel Research Platform Leuven (TRPLe), Department of Cellular and Molecular Medicine, University of Leuven, Herestraat 49 box 802, B-3000 Leuven, Belgium
| | - Annelies Janssens
- Laboratory of Ion Channel Research and TRP Channel Research Platform Leuven (TRPLe), Department of Cellular and Molecular Medicine, University of Leuven, Herestraat 49 box 802, B-3000 Leuven, Belgium
| | - Rudi Vennekens
- Laboratory of Ion Channel Research and TRP Channel Research Platform Leuven (TRPLe), Department of Cellular and Molecular Medicine, University of Leuven, Herestraat 49 box 802, B-3000 Leuven, Belgium
| | - Pieter Vanden Berghe
- Laboratory for Enteric NeuroScience, Department of Clinical and Experimental Medicine, University of Leuven, B-3000 Leuven, Belgium
- Translational Research Centre for Gastrointestinal Disorders, KU Leuven, Herestraat 49 box 701, B-3000 Leuven, Belgium
| | - Thierry Galli
- Institut Jacques Monod, CNRS UMR 7592, University of Paris Diderot, F-75013 Paris, France
- INSERM ERL U950, Membrane Traffic in Health & disease Group, F-75013 Paris, France
| | - Joris Vriens
- Laboratory of Ion Channel Research and TRP Channel Research Platform Leuven (TRPLe), Department of Cellular and Molecular Medicine, University of Leuven, Herestraat 49 box 802, B-3000 Leuven, Belgium
- Laboratory of Experimental Gynaecology, Department of Development and Regeneration, University of Leuven, Herestraat 49 box 611, B-3000 Leuven, Belgium
| | - Thomas Voets
- Laboratory of Ion Channel Research and TRP Channel Research Platform Leuven (TRPLe), Department of Cellular and Molecular Medicine, University of Leuven, Herestraat 49 box 802, B-3000 Leuven, Belgium
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37
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Rombouts K, Braeckmans K, Remaut K. Fluorescent Labeling of Plasmid DNA and mRNA: Gains and Losses of Current Labeling Strategies. Bioconjug Chem 2015; 27:280-97. [PMID: 26670733 DOI: 10.1021/acs.bioconjchem.5b00579] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Live-cell imaging has provided the life sciences with insights into the cell biology and dynamics. Fluorescent labeling of target molecules proves to be indispensable in this regard. In this Review, we focus on the current fluorescent labeling strategies for nucleic acids, and in particular mRNA (mRNA) and plasmid DNA (pDNA), which are of interest to a broad range of scientific fields. By giving a background of the available techniques and an evaluation of the pros and cons, we try to supply scientists with all the information needed to come to an informed choice of nucleic acid labeling strategy aimed at their particular needs.
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Affiliation(s)
- K Rombouts
- Laboratory of general biochemistry and physical pharmacy, Faculty of pharmacy and ‡Centre for Nano- and Biophotonics, Ghent University , Ghent 9000, Belgium
| | - K Braeckmans
- Laboratory of general biochemistry and physical pharmacy, Faculty of pharmacy and ‡Centre for Nano- and Biophotonics, Ghent University , Ghent 9000, Belgium
| | - K Remaut
- Laboratory of general biochemistry and physical pharmacy, Faculty of pharmacy and ‡Centre for Nano- and Biophotonics, Ghent University , Ghent 9000, Belgium
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38
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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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39
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Gustafson HH, Holt-Casper D, Grainger DW, Ghandehari H. Nanoparticle Uptake: The Phagocyte Problem. NANO TODAY 2015; 10:487-510. [PMID: 26640510 PMCID: PMC4666556 DOI: 10.1016/j.nantod.2015.06.006] [Citation(s) in RCA: 821] [Impact Index Per Article: 91.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Phagocytes are key cellular participants determining important aspects of host exposure to nanomaterials, initiating clearance, biodistribution and the tenuous balance between host tolerance and adverse nanotoxicity. Macrophages in particular are believed to be among the first and primary cell types that process nanoparticles, mediating host inflammatory and immunological biological responses. These processes occur ubiquitously throughout tissues where nanomaterials are present, including the host mononuclear phagocytic system (MPS) residents in dedicated host filtration organs (i.e., liver, kidney spleen, and lung). Thus, to understand nanomaterials exposure risks it is critical to understand how nanomaterials are recognized, internalized, trafficked and distributed within diverse types of host macrophages and how possible cell-based reactions resulting from nanomaterial exposures further inflammatory host responses in vivo. This review focuses on describing macrophage-based initiation of downstream hallmark immunological and inflammatory processes resulting from phagocyte exposure to and internalization of nanomaterials.
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Affiliation(s)
- Heather Herd Gustafson
- University of Utah, Department of Bioengineering, 36 S. Wasatch Dr, Salt Lake City, Utah 84112 USA ; University of Utah, Utah Center for Nanomedicine, Nano Institute of Utah, 36 S. Wasatch Dr., Salt Lake City, Utah 84112 USA
| | - Dolly Holt-Casper
- University of Utah, Department of Bioengineering, 36 S. Wasatch Dr, Salt Lake City, Utah 84112 USA
| | - David W Grainger
- University of Utah, Department of Bioengineering, 36 S. Wasatch Dr, Salt Lake City, Utah 84112 USA ; University of Utah, Utah Center for Nanomedicine, Nano Institute of Utah, 36 S. Wasatch Dr., Salt Lake City, Utah 84112 USA ; University of Utah, Department of Pharmaceutics and Pharmaceutical Chemistry, 30 South 2000 East, Rm 301, Salt Lake City, UT USA 84112
| | - Hamidreza Ghandehari
- University of Utah, Department of Bioengineering, 36 S. Wasatch Dr, Salt Lake City, Utah 84112 USA ; University of Utah, Utah Center for Nanomedicine, Nano Institute of Utah, 36 S. Wasatch Dr., Salt Lake City, Utah 84112 USA ; University of Utah, Department of Pharmaceutics and Pharmaceutical Chemistry, 30 South 2000 East, Rm 301, Salt Lake City, UT USA 84112
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40
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Schoelermann J, Burtey A, Allouni ZE, Gerdes HH, Cimpan MR. Contact-dependent transfer of TiO₂ nanoparticles between mammalian cells. Nanotoxicology 2015; 10:204-15. [PMID: 26037905 DOI: 10.3109/17435390.2015.1048322] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Cellular organelles have been shown to shuttle between cells in co-culture. We hereby show that titanium dioxide (TiO2) nanoparticles (NPs) can be transferred in such a manner, between cells in direct contact, along with endosomes and lysosomes. A co-culture system was employed for this purpose and the NP transfer was observed in mammalian cells including normal rat kidney (NRK) and HeLa cells. We found that the small GTPase Arf6 facilitates the intercellular transfer of smaller NPs and agglomerates. Spherical, anatase nano-TiO2 with sizes of 5 (Ti5) and 40 nm (Ti40) were used in this study. Humans are increasingly exposed to TiO2 NPs from external sources such as constituents of foods, cosmetics, and pharmaceuticals, or from internal sources represented by Ti-based implants, which release NPs upon abrasion. Exposure to 5 mg/l of Ti5 and Ti40 for 24 h did not affect cellular viability but modified their ability to communicate with surrounding cells. Altogether, our results have important implications for the design of nanomedicines, drug delivery and toxicity.
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Affiliation(s)
- Julia Schoelermann
- a Department of Biomedicine, Faculty of Medicine and Dentistry , University of Bergen , Bergen , Norway and
| | - Anne Burtey
- a Department of Biomedicine, Faculty of Medicine and Dentistry , University of Bergen , Bergen , Norway and
| | - Zouhir Ekeland Allouni
- b Division of Biomaterials, Department of Clinical Dentistry, Faculty of Medicine and Dentistry , University of Bergen , Bergen , Norway
| | - Hans-Hermann Gerdes
- a Department of Biomedicine, Faculty of Medicine and Dentistry , University of Bergen , Bergen , Norway and
| | - Mihaela Roxana Cimpan
- b Division of Biomaterials, Department of Clinical Dentistry, Faculty of Medicine and Dentistry , University of Bergen , Bergen , Norway
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41
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Varela JA, Åberg C, Simpson JC, Dawson KA. Trajectory-based co-localization measures for nanoparticle-cell interaction studies. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:2026-2031. [PMID: 25504742 DOI: 10.1002/smll.201401849] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Revised: 09/23/2014] [Indexed: 05/28/2023]
Abstract
High-resolution live cell microscopy will soon have a fundamental role in understanding bio-nano interactions, providing material that can be exploited using single particle tracking techniques. The present work uses 3D timelapse images obtained with confocal microscopy, to temporally resolve the co-localization between polystyrene nanoparticles and lysosomes in live cells through object-based measurements.
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Affiliation(s)
- Juan A Varela
- Centre for BioNano Interactions, School of Chemistry and Chemical Biology - University College Dublin, Belfield, Dublin 4, Ireland
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42
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Tsou CJ, Hsia CH, Chu JY, Hung Y, Chen YP, Chien FC, Chou KC, Chen P, Mou CY. Local pH tracking in living cells. NANOSCALE 2015; 7:4217-4225. [PMID: 25672786 DOI: 10.1039/c4nr06545j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Continuous and simultaneous 3D single-particle movement and local pH detection in HeLa cells were demonstrated for the first time by combining fluorescent mesoporous silica nanoparticles (FMSNs) and a single-particle tracking (SPT) technique with a precision of ∼10 nm. FMSNs, synthesized by the co-condensation of both pH-sensitive and reference dyes with a silica/surfactant source, allow long-term reliable ratiometric pH measurements with a precision better than 0.3 pH unit because of their excellent brightness and stability. pH variation in the surrounding area of FMSNs during endocytosis was monitored in real-time. Acidification and low mobility of FMSNs were observed at the early endocytic stage, whereas basification and high mobility of FMSNs were observed at the late stage. Our results indicate that it is possible to monitor local pH changes in the environments surrounding nanoparticles during the cellular uptake process of FMSNs, which provides much needed information for designing an efficient drug delivery nanosystem.
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Affiliation(s)
- Chieh-Jui Tsou
- Department of Chemistry, National Taiwan University, Taipei, Taiwan 106.
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43
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Majzoub RN, Chan CL, Ewert KK, Silva BFB, Liang KS, Safinya CR. Fluorescence microscopy colocalization of lipid-nucleic acid nanoparticles with wildtype and mutant Rab5-GFP: A platform for investigating early endosomal events. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2015; 1848:1308-18. [PMID: 25753113 DOI: 10.1016/j.bbamem.2015.03.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Revised: 02/26/2015] [Accepted: 03/01/2015] [Indexed: 11/19/2022]
Abstract
Endosomal entrapment is known to be a major bottleneck to successful cytoplasmic delivery of nucleic acids (NAs) using cationic liposome-NA nanoparticles (NPs). Quantitative measurements of distributions of NPs within early endosomes (EEs) have proven difficult due to the sub-resolution size and short lifetime of wildtype EEs. In this study we used Rab5-GFP, a member of the large family of GTPases which cycles between the plasma membrane and early endosomes, to fluorescently label early endosomes. Using fluorescence microscopy and quantitative image analysis of cells expressing Rab5-GFP, we found that at early time points (t<1h), only a fraction (≈35%) of RGD-tagged NPs (which target cell surface integrins) colocalize with wildtype EEs, independent of the NP's membrane charge density. In comparison, a GTP-hydrolysis deficient mutant, Rab5-Q79L, which extends the size and lifetime of EEs yielding giant early endosomes (GEEs), enabled us to resolve and localize individual NPs found within the GEE lumen. Remarkably, nearly all intracellular NPs are found to be trapped within GEEs implying little or no escape at early time points. The observed small degree of colocalization of NPs and wildtype Rab5 is consistent with recycling of Rab5-GDP to the plasma membrane and not indicative of NP escape from EEs. Taken together, our results show that endosomal escape of PEGylated nanoparticles occurs downstream of EEs i.e., from late endosomes/lysosomes. Our studies also suggest that Rab5-Q79L could be used in a robust imaging assay which allows for direct visualization of NP interactions with the luminal membrane of early endosomes.
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Affiliation(s)
- Ramsey N Majzoub
- Department of Physics, University of California, Santa Barbara, CA 93106, USA; Department of Materials, University of California, Santa Barbara, CA 93106, USA; Molecular, Cellular and Developmental Biology Department, University of California, Santa Barbara, CA 93106, USA
| | - Chia-Ling Chan
- Department of Physics, University of California, Santa Barbara, CA 93106, USA; Department of Materials, University of California, Santa Barbara, CA 93106, USA; Molecular, Cellular and Developmental Biology Department, University of California, Santa Barbara, CA 93106, USA; Institute of Physics, Academica Sinica, Taipei 11529, Taiwan; National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - Kai K Ewert
- Department of Physics, University of California, Santa Barbara, CA 93106, USA; Department of Materials, University of California, Santa Barbara, CA 93106, USA; Molecular, Cellular and Developmental Biology Department, University of California, Santa Barbara, CA 93106, USA
| | - Bruno F B Silva
- Department of Physics, University of California, Santa Barbara, CA 93106, USA; Department of Materials, University of California, Santa Barbara, CA 93106, USA; Molecular, Cellular and Developmental Biology Department, University of California, Santa Barbara, CA 93106, USA; Division of Physical Chemistry, Centre for Chemistry and Chemical Engineering, Lund University, SE-221 00 Lund, Sweden
| | - Keng S Liang
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan; Department of Electrophysics, National Chiao-Tung University, Hsinchu 30010, Taiwan
| | - Cyrus R Safinya
- Department of Physics, University of California, Santa Barbara, CA 93106, USA; Department of Materials, University of California, Santa Barbara, CA 93106, USA; Molecular, Cellular and Developmental Biology Department, University of California, Santa Barbara, CA 93106, USA.
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44
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Zhong X, Panus D, Ji W, Wang C. Modulating polyplex-mediated gene transfection by small-molecule regulators of autophagy. Mol Pharm 2015; 12:932-40. [PMID: 25658873 DOI: 10.1021/mp500764p] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Nonviral gene transfection mediated by cationic polymer/DNA polyplexes often imposes stress and toxicity to cells. To better understand the relationship between cellular stress responses and polyplex-mediated transfection, polyplex-induced early autophagy in mouse fibroblasts was characterized and the impact of autophagy modulation on transgene expression evaluated. Transmission electron microscopy revealed the formation of double-membraned autophagosome in the cytoplasm of polyplex-transfected cells. Immunofluorescence staining and microscopy revealed intracellular LC3 punctation that was characteristic of early autophagy activation. Elevated expression of autophagosome-associated LC3 II protein was also detected by Western blot. When cells were treated with small-molecule modulators of autophagy, polyplex-mediated gene transfection efficiency was significantly affected. 3-Methyladenine (3-MA), an early autophagy inhibitor, reduced transfection efficiency, whereas rapamycin, an autophagy inducer, enhanced transgene expression. Importantly, the observed functional impact on gene transfection by autophagy modulation was decoupled from that of other modes of cellular stress response (apoptosis/necrosis). Treatment of cells by 3-MA or rapamycin did not affect the level of intracellular reactive oxygen species (ROS) but did decrease or increase, respectively, nuclear localization of polyplex-delivered plasmid DNA. These findings suggest new possibilities of enhancing polyplex-mediated gene delivery by codelivery of small-molecule regulators of autophagy.
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Affiliation(s)
- Xiao Zhong
- Department of Biomedical Engineering, University of Minnesota , 7-105 Hasselmo Hall, 312 Church Street SE, Minneapolis, Minnesota 55455, United States
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45
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Zagato E, Forier K, Martens T, Neyts K, Demeester J, De Smedt S, Remaut K, Braeckmans K. Single-particle tracking for studying nanomaterial dynamics: applications and fundamentals in drug delivery. Nanomedicine (Lond) 2015; 9:913-27. [PMID: 24981654 DOI: 10.2217/nnm.14.43] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Many macromolecular therapeutics could potentially treat genetic disorders and cancer. They have, however, not yet reached the clinical stage owing to a lack of suitable carriers that can bring the therapeutics from the administration site to the subcellular site in target cells. One of the reasons that is hindering the development of such carriers is the limited knowledge of their transport dynamics and intracellular processing. Single-particle tracking (SPT) microscopy, thanks to its single molecule sensitivity and its broad applicability, has found its entry in the field of drug delivery to get an answer to these questions. This review aims to introduce the fundamentals of SPT to the drug delivery community and highlight the most recent discoveries obtained with SPT in the field of drug delivery.
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Affiliation(s)
- Elisa Zagato
- Laboratory of General Biochemistry & Physical Pharmacy, Ghent University, Ghent, Belgium
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46
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Hofmann D, Tenzer S, Bannwarth MB, Messerschmidt C, Glaser SF, Schild H, Landfester K, Mailänder V. Mass spectrometry and imaging analysis of nanoparticle-containing vesicles provide a mechanistic insight into cellular trafficking. ACS NANO 2014; 8:10077-10088. [PMID: 25244389 DOI: 10.1021/nn502754c] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Rational design of nanocarriers for drug delivery approaches requires an unbiased knowledge of uptake mechanisms and intracellular trafficking pathways. Here we dissected these processes using a quantitative proteomics approach. We isolated intracellular vesicles containing superparamagnetic iron oxide polystyrene nanoparticles and analyzed their protein composition by label-free quantitative mass spectrometry. The proteomic snapshot of organelle marker proteins revealed that an atypical macropinocytic-like mechanism mediated the entry of nanoparticles. We show that the entry mechanism is controlled by actin reorganization, atypical macropinocytic signaling, and ADP-ribosylation factor 1. Additionally, our proteomics data demonstrated a central role for multivesicular bodies and multilamellar lysosomes in trafficking and final nanoparticle storage. This was confirmed by confocal microscopy and cryo-TEM measurements. By quantitatively analyzing the protein composition of nanoparticle-containing vesicles, our study clearly defines the routes of nanoparticle entry, intracellular trafficking, and the proteomic milieu of a nanoparticle-containing vesicle.
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Affiliation(s)
- Daniel Hofmann
- Max Planck Institute for Polymer Research , Ackermannweg 10, 55128 Mainz, Germany
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47
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Mu Q, Jiang G, Chen L, Zhou H, Fourches D, Tropsha A, Yan B. Chemical basis of interactions between engineered nanoparticles and biological systems. Chem Rev 2014; 114:7740-81. [PMID: 24927254 PMCID: PMC4578874 DOI: 10.1021/cr400295a] [Citation(s) in RCA: 358] [Impact Index Per Article: 35.8] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Qingxin Mu
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, China, 250100
- Present address: Department of Pharmaceutical Chemistry, School of Pharmacy, University of Kansas, Lawrence, Kansas, 66047
| | - Guibin Jiang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Lingxin Chen
- Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
| | - Hongyu Zhou
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, China, 250100
- Department of Surgery, Emory University School of Medicine, Atlanta, Georgia, 30322, U.S.A
| | | | - Alexander Tropsha
- Laboratory for Molecular Modeling, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina, 27599
| | - Bing Yan
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, China, 250100
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48
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Remaut K, Oorschot V, Braeckmans K, Klumperman J, De Smedt SC. Lysosomal capturing of cytoplasmic injected nanoparticles by autophagy: an additional barrier to non viral gene delivery. J Control Release 2014; 195:29-36. [PMID: 25125327 DOI: 10.1016/j.jconrel.2014.08.002] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Revised: 08/01/2014] [Accepted: 08/02/2014] [Indexed: 11/18/2022]
Abstract
Autophagy or 'self-eating' is a process by which defective organelles and foreign material can be cleared from the cell's cytoplasm and delivered to the lysosomes in which degradation occurs. It remains an open question, however, whether nanoparticles that did not enter the cell through endocytosis can also be captured from the cytoplasm by autophagy. We demonstrate that nanoparticles that are introduced directly in the cytoplasm of the cells by microinjection, can trigger an autophagy response. Moreover, both polystyrene beads and plasmid DNA containing poly-ethylene-imine complexes colocalize with autophagosomes and lysosomes, as was confirmed by electron microscopy. This indicates that cytoplasmic capturing of nanoparticles can occur by an autophagy response. The capturing of nanoparticles from the cytoplasm most likely limits the time frame in which efficient nucleic acid delivery can be obtained. Hence, autophagy forms an additional barrier to non-viral gene delivery, a notion that was not often taken into account before. Furthermore, these findings urge us to reconsider the idea that a single endosomal escape event is sufficient to have the long-lasting presence of nanoparticles in the cytoplasm of the cells.
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Affiliation(s)
- Katrien Remaut
- Lab General Biochemistry & Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, Belgium
| | - Viola Oorschot
- Dept. of Cell Biology, Center for Molecular Medicine, Universital Medical Center Utrecht, The Netherlands
| | - Kevin Braeckmans
- Lab General Biochemistry & Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, Belgium
| | - Judith Klumperman
- Dept. of Cell Biology, Center for Molecular Medicine, Universital Medical Center Utrecht, The Netherlands
| | - Stefaan C De Smedt
- Lab General Biochemistry & Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, Belgium.
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49
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Oupický D, Li J. Bioreducible polycations in nucleic acid delivery: past, present, and future trends. Macromol Biosci 2014; 14:908-22. [PMID: 24678057 PMCID: PMC4410047 DOI: 10.1002/mabi.201400061] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2014] [Revised: 02/19/2014] [Indexed: 12/16/2022]
Abstract
Polycations that are degradable by reduction of disulfide bonds are developed for applications in delivery of nucleic acids. This Feature Article surveys methods of synthesis of bioreducible polycations and discusses current understanding of the mechanism of action of bioreducible polyplexes. Emphasis is placed on the relationship between the biological redox environment and toxicity, trafficking, transfection activity, and in vivo behavior of bioreducible polycations and polyplexes.
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Affiliation(s)
- David Oupický
- Department of Pharmaceutical Sciences, Center for Drug Delivery and Nanomedicine, University of Nebraska Medical Center, Durham Research Center, 985830 Nebraska Medical Center, Omaha, NE 68198-5830, USA.
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50
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Rombouts K, Martens TF, Zagato E, Demeester J, De Smedt SC, Braeckmans K, Remaut K. Effect of Covalent Fluorescence Labeling of Plasmid DNA on Its Intracellular Processing and Transfection with Lipid-Based Carriers. Mol Pharm 2014; 11:1359-68. [DOI: 10.1021/mp4003078] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Koen Rombouts
- Laboratory
for General Biochemistry and Physical Pharmacy, Ghent University, Ghent 9000, Belgium
- Centre
for Nano- and Biophotonics, Ghent University, Ghent 9000, Belgium
| | - Thomas F. Martens
- Laboratory
for General Biochemistry and Physical Pharmacy, Ghent University, Ghent 9000, Belgium
- Centre
for Nano- and Biophotonics, Ghent University, Ghent 9000, Belgium
| | - Elisa Zagato
- Laboratory
for General Biochemistry and Physical Pharmacy, Ghent University, Ghent 9000, Belgium
- Centre
for Nano- and Biophotonics, Ghent University, Ghent 9000, Belgium
| | - Jo Demeester
- Laboratory
for General Biochemistry and Physical Pharmacy, Ghent University, Ghent 9000, Belgium
| | - Stefaan C. De Smedt
- Laboratory
for General Biochemistry and Physical Pharmacy, Ghent University, Ghent 9000, Belgium
| | - Kevin Braeckmans
- Laboratory
for General Biochemistry and Physical Pharmacy, Ghent University, Ghent 9000, Belgium
- Centre
for Nano- and Biophotonics, Ghent University, Ghent 9000, Belgium
| | - Katrien Remaut
- Laboratory
for General Biochemistry and Physical Pharmacy, Ghent University, Ghent 9000, Belgium
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