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Yu S, Shao X, Wu T, Liu Z, Yu P, Xing J. Preparation of PMMA-Based Temperature/pH Responsive Nanoparticles Encapsulating 5-Fluorouracil and Methotrexate In Situ by One-Pot Dispersion Photopolymerization. Macromol Biosci 2024; 24:e2300469. [PMID: 38197551 DOI: 10.1002/mabi.202300469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 12/14/2023] [Indexed: 01/11/2024]
Abstract
In order to achieve long-term and controllable release of anti-tumor drugs at specific sites, temperature/pH responsive nanoparticles encapsulating 5-fluorouracil and methotrexate in situ are prepared through dispersion photopolymerization under green LED irradiation. The physicochemical properties of nanoparticles are characterized by scanning electron microscopy, Fourier transform infrared, dynamic light scattering, thermogravimetric/differential scanning calorimetry, and X-ray diffraction. In vitro drug release at different temperatures and pH values is examined to ascertain the release pattern of two drugs, which can be well described by Korsmeyer-Peppas kinetic model. The cytotoxicity evaluation illustrates that the tumor cells could be more effectively killed by the drug-loaded nanoparticles, and the improved therapeutic effect is attributed to the controllable and sustainable drug release as well as the enhanced cellular uptake. The blood safety and good biocompatibility of nanoparticles are further confirmed by hemolysis assay, indicating the prepared nanoparticles are potential candidates for effective tumor treatment.
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Affiliation(s)
- Siyuan Yu
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300350, China
| | - Xian Shao
- NHC Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, Chu Hsien-I Memorial Hospital and Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, 300134, China
| | - Tong Wu
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300350, China
| | - Zheng Liu
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300350, China
| | - Pei Yu
- NHC Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, Chu Hsien-I Memorial Hospital and Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, 300134, China
| | - Jinfeng Xing
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300350, China
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2
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Ueha T, Kusuda M, Shibata S, Hirata M, Ozaki N. [Pharmacological actions of anifrolumab (Saphnelo ®) and clinical trial results as a treatment for systemic lupus erythematosus]. Nihon Yakurigaku Zasshi 2022; 157:271-279. [PMID: 35781459 DOI: 10.1254/fpj.22026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Systemic lupus erythematosus (SLE) is an autoimmune disease which causes damaging inflammation in multiple organs via the accumulation of immune complexes. SLE pathogenesis is associated with type I interferons (IFNs), which are central and reflective of disease activity in SLE. Even before clinical development of disease, genetic and environmental contributions to IFN production lead to abnormal innate and adaptive immune activation. Through the Janus kinase-signal transducer and activator of transcription signaling pathway, IFN play a central role in the immunopathogenicity of SLE. Thus, IFN-blocking therapy may be used to regulate inflammation in individuals with SLE. Food and Drug Administration (FDA)-approved anifrolumab (Saphnelo®), which is a human IgG1κ monoclonal antibody that binds to subunit 1 of the type I interferon receptor with high specificity and affinity, was also approved for the treatment of adult patients with moderate to severe SLE who are receiving standard therapy by Pharmaceuticals and Medical Device Agency (PMDA), in Japan in September 2021; anifrolumab is administered as an intravenous infusion, 300 mg over a 30-minute period, every 4 weeks. In this article, we reviewed the actions of type I IFN and anifrolumab as a treatment for SLE.
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3
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Kimmig J, Schuett T, Vollrath A, Zechel S, Schubert US. Prediction of Nanoparticle Sizes for Arbitrary Methacrylates Using Artificial Neuronal Networks. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:e2102429. [PMID: 34687160 PMCID: PMC8655218 DOI: 10.1002/advs.202102429] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Indexed: 06/13/2023]
Abstract
Particle sizes represent one of the key factors influencing the usability and specific targeting of nanoparticles in medical applications such as vectors for drug or gene therapy. A multi-layered graph convolutional network combined with a fully connected neuronal network is presented for the prediction of the size of nanoparticles based only on the polymer structure, the degree of polymerization, and the formulation parameters. The model is capable of predicting particle sizes obtained by nanoprecipitation of different poly(methacrylates). This includes polymers the network has not been trained with, indicating the high potential for generalizability of the model. By utilizing this model, a significant amount of time and resources can be saved in formulation optimization without extensive primary testing of material properties.
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Affiliation(s)
- Julian Kimmig
- Laboratory of Organic and Macromolecular Chemistry (IOMC)Friedrich Schiller University JenaHumboldtstr. 10Jena07743Germany
- Jena Center of Soft Matter (JCSM)Friedrich Schiller University JenaPhilosophenweg 7Jena07743Germany
| | - Timo Schuett
- Laboratory of Organic and Macromolecular Chemistry (IOMC)Friedrich Schiller University JenaHumboldtstr. 10Jena07743Germany
- Jena Center of Soft Matter (JCSM)Friedrich Schiller University JenaPhilosophenweg 7Jena07743Germany
| | - Antje Vollrath
- Laboratory of Organic and Macromolecular Chemistry (IOMC)Friedrich Schiller University JenaHumboldtstr. 10Jena07743Germany
- Jena Center of Soft Matter (JCSM)Friedrich Schiller University JenaPhilosophenweg 7Jena07743Germany
| | - Stefan Zechel
- Laboratory of Organic and Macromolecular Chemistry (IOMC)Friedrich Schiller University JenaHumboldtstr. 10Jena07743Germany
- Jena Center of Soft Matter (JCSM)Friedrich Schiller University JenaPhilosophenweg 7Jena07743Germany
| | - Ulrich S. Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC)Friedrich Schiller University JenaHumboldtstr. 10Jena07743Germany
- Jena Center of Soft Matter (JCSM)Friedrich Schiller University JenaPhilosophenweg 7Jena07743Germany
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4
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Elzayat A, Adam-Cervera I, Álvarez-Bermúdez O, Muñoz-Espí R. Nanoemulsions for synthesis of biomedical nanocarriers. Colloids Surf B Biointerfaces 2021; 203:111764. [PMID: 33892282 DOI: 10.1016/j.colsurfb.2021.111764] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 03/21/2021] [Accepted: 04/08/2021] [Indexed: 12/27/2022]
Abstract
Nanoemulsions are kinetically stabilized emulsions with droplet sizes in the nanometer scale. These nanodroplets are able to confine spaces in which reactions of polymerization or precipitation can take place, leading to the formation of particles and capsules that can act as nanocarriers for biomedical applications. This review discusses the different possibilities of using nanoemulsions for preparing biomedical nanocarriers. According to the chemical nature, nanocarriers prepared in nanoemulsions are classified in polymeric, inorganic, or hybrid. The main synthetic strategies for each type are revised, including miniemulsion polymerization, nanoemulsion-solvent evaporation, spontaneous emulsification, sol-gel processes, and combination of different techniques to form multicomponent materials.
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Affiliation(s)
- Asmaa Elzayat
- Institute of Materials Science (ICMUV), Universitat de València, c/ Catedràtic José Beltrán 2, 46980 Paterna, Spain; Physics Department, Faculty of Science, Mansoura University, 35516 Mansoura, Egypt
| | - Inés Adam-Cervera
- Institute of Materials Science (ICMUV), Universitat de València, c/ Catedràtic José Beltrán 2, 46980 Paterna, Spain
| | - Olaia Álvarez-Bermúdez
- Institute of Materials Science (ICMUV), Universitat de València, c/ Catedràtic José Beltrán 2, 46980 Paterna, Spain
| | - Rafael Muñoz-Espí
- Institute of Materials Science (ICMUV), Universitat de València, c/ Catedràtic José Beltrán 2, 46980 Paterna, Spain.
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5
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Tissue distribution of gold and silver after subacute intravenous injection of co-administered gold and silver nanoparticles of similar sizes. Arch Toxicol 2018; 92:1393-1405. [DOI: 10.1007/s00204-018-2173-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Accepted: 01/31/2018] [Indexed: 11/27/2022]
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6
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Zhang B, Song Y, Wang T, Yang S, Zhang J, Liu Y, Zhang N, Garg S. Efficient co-delivery of immiscible hydrophilic/hydrophobic chemotherapeutics by lipid emulsions for improved treatment of cancer. Int J Nanomedicine 2017; 12:2871-2886. [PMID: 28435264 PMCID: PMC5391159 DOI: 10.2147/ijn.s129091] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Combinational nanomedicine is becoming a topic of much interest in cancer therapy, although its translation into the clinic remains extremely challenging. One of the main obstacles lies in the difficulty to efficiently co-deliver immiscible hydrophilic/hydrophobic drugs into tumor sites. The aim of this study was to develop co-loaded lipid emulsions (LEs) to co-deliver immiscible hydrophilic/hydrophobic drugs to improve cancer therapy and to explore the co-delivery abilities between co-loaded LEs and mixture formulation. Multiple oxaliplatin/irinotecan drug–phospholipid complexes (DPCs) were formulated. Co-loaded LEs were prepared using DPC technique to efficiently encapsulate both drugs. Co-loaded LEs exhibited uniform particle size distribution, desired stability and synchronous release profiles in both drugs. Co-loaded LEs demonstrated superior anti-tumor activity compared with the simple solution mixture and the mixture of single-loaded LEs. Furthermore, co-loaded nanocarriers could co-deliver both drugs into the same cells more efficiently and exhibited the optimized synergistic effect. These results indicate that co-loaded LEs could be a desired formulation for enhanced cancer therapy with potential application prospects. The comparison between co-loaded LEs and mixture formulation is significant for pharmaceutical designs aimed at co-delivery of multiple drugs.
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Affiliation(s)
- Bo Zhang
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Shandong University, Jinan, Shandong Province, People's Republic of China
| | - Yunmei Song
- Centre for Pharmaceutical Innovation and Development (CPID), School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, SA, Australia
| | - Tianqi Wang
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Shandong University, Jinan, Shandong Province, People's Republic of China
| | - Shaomei Yang
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Shandong University, Jinan, Shandong Province, People's Republic of China
| | - Jing Zhang
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Shandong University, Jinan, Shandong Province, People's Republic of China
| | - Yongjun Liu
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Shandong University, Jinan, Shandong Province, People's Republic of China
| | - Na Zhang
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Shandong University, Jinan, Shandong Province, People's Republic of China
| | - Sanjay Garg
- Centre for Pharmaceutical Innovation and Development (CPID), School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, SA, Australia
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7
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Reifarth M, Pretzel D, Schubert S, Weber C, Heintzmann R, Hoeppener S, Schubert US. Cellular uptake of PLA nanoparticles studied by light and electron microscopy: synthesis, characterization and biocompatibility studies using an iridium(iii) complex as correlative label. Chem Commun (Camb) 2016; 52:4361-4. [DOI: 10.1039/c5cc09884j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
We present the synthesis of polylactide by ring-opening polymerization using a luminescent iridium(iii) complex acting as initiator.
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Affiliation(s)
- Martin Reifarth
- Laboratory of Organic and Macromolecular Chemistry (IOMC)
- Friedrich Schiller University Jena
- D-07743 Jena
- Germany
- Jena Center for Soft Matter (JCSM)
| | - David Pretzel
- Laboratory of Organic and Macromolecular Chemistry (IOMC)
- Friedrich Schiller University Jena
- D-07743 Jena
- Germany
- Jena Center for Soft Matter (JCSM)
| | - Stephanie Schubert
- Jena Center for Soft Matter (JCSM)
- Friedrich Schiller University Jena
- D-07743 Jena
- Germany
- Institute of Pharmacy
| | - Christine Weber
- Laboratory of Organic and Macromolecular Chemistry (IOMC)
- Friedrich Schiller University Jena
- D-07743 Jena
- Germany
- Jena Center for Soft Matter (JCSM)
| | - Rainer Heintzmann
- Institute of Physical Chemistry and Abbe Center of Photonics
- Friedrich-Schiller-University Jena
- D-07743 Jena
- Germany
- Leibniz Institute of Photonic Technology
| | - Stephanie Hoeppener
- Laboratory of Organic and Macromolecular Chemistry (IOMC)
- Friedrich Schiller University Jena
- D-07743 Jena
- Germany
- Jena Center for Soft Matter (JCSM)
| | - Ulrich S. Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC)
- Friedrich Schiller University Jena
- D-07743 Jena
- Germany
- Jena Center for Soft Matter (JCSM)
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8
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Steinbach JM, Seo YE, Saltzman WM. Cell penetrating peptide-modified poly(lactic-co-glycolic acid) nanoparticles with enhanced cell internalization. Acta Biomater 2016; 30:49-61. [PMID: 26602822 DOI: 10.1016/j.actbio.2015.11.029] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Revised: 11/10/2015] [Accepted: 11/16/2015] [Indexed: 01/13/2023]
Abstract
The surface modification of nanoparticles (NPs) can enhance the intracellular delivery of drugs, proteins, and genetic agents. Here we studied the effect of different surface ligands, including cell penetrating peptides (CPPs), on the cell binding and internalization of poly(lactic-co-glycolic) (PLGA) NPs. Relative to unmodified NPs, we observed that surface-modified NPs greatly enhanced cell internalization. Using one CPP, MPG (unabbreviated notation), that achieved the highest degree of internalization at both low and high surface modification densities, we evaluated the effect of two different NP surface chemistries on cell internalization. After 2h, avidin-MPG NPs enhanced cellular internalization by 5 to 26-fold relative to DSPE-MPG NP formulations. Yet, despite a 5-fold increase in MPG density on DSPE compared to Avidin NPs, both formulations resulted in similar internalization levels (48 and 64-fold, respectively) after 24h. Regardless of surface modification, all NPs were internalized through an energy-dependent, clathrin-mediated process, and became dispersed throughout the cell. Overall both Avidin- and DSPE-CPP modified NPs significantly increased internalization and offer promising delivery options for applications in which internalization presents challenges to efficacious delivery.
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9
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Tosi G, Vilella A, Veratti P, Belletti D, Pederzoli F, Ruozi B, Vandelli MA, Zoli M, Forni F. Exploiting Bacterial Pathways for BBB Crossing with PLGA Nanoparticles Modified with a Mutated Form of Diphtheria Toxin (CRM197): In Vivo Experiments. Mol Pharm 2015; 12:3672-84. [PMID: 26312414 DOI: 10.1021/acs.molpharmaceut.5b00446] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Drugs can be targeted to the brain using polymeric nanoparticles (NPs) engineered on their surface with ligands able to allow crossing of the blood-brain barrier (BBB). This article aims to investigate the BBB crossing efficiency of polymeric poly lactide-co-glycolide (PLGA) NPs modified with a mutated form of diphtheria toxin (CRM197) in comparison with the results previously obtained using PLGA NPs modified with a glycopeptide (g7-NPs). Different kinds of NPs, covalently coupled PLGA with different fluorescent probes (DY405, rhodamine-B base and DY675) and different ligands (g7 and CRM197) were tested in vivo to assess their behavior and trafficking. The results highlighted the possibility to distinguish the different kinds of simultaneously administered NPs and to emphasize that CRM-197 modified NPs and g7-NPs can cross the BBB at a similar extent. The analysis of BBB crossing and of the neuronal tropism of CRM197 modified NPs, along with their BBB crossing pathways were also developed. In vivo pharmacological studies performed on CRM197 engineered NPs, loaded with loperamide, underlined their ability as drug carriers to the CNS.
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Affiliation(s)
- G Tosi
- Nanomedicine Group, Te.Far.T.I. center, Department of Life Sciences, University of Modena and Reggio Emilia , 41124 Modena, Italy.,NEST, Istituto Nanoscienze-CNR , Piazza San Silvestro 12, 56127 Pisa, Italy
| | - A Vilella
- Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia , 41124 Modena, Italy
| | - P Veratti
- Nanomedicine Group, Te.Far.T.I. center, Department of Life Sciences, University of Modena and Reggio Emilia , 41124 Modena, Italy
| | - D Belletti
- Nanomedicine Group, Te.Far.T.I. center, Department of Life Sciences, University of Modena and Reggio Emilia , 41124 Modena, Italy
| | - F Pederzoli
- Nanomedicine Group, Te.Far.T.I. center, Department of Life Sciences, University of Modena and Reggio Emilia , 41124 Modena, Italy.,NEST, Istituto Nanoscienze-CNR , Piazza San Silvestro 12, 56127 Pisa, Italy
| | - B Ruozi
- Nanomedicine Group, Te.Far.T.I. center, Department of Life Sciences, University of Modena and Reggio Emilia , 41124 Modena, Italy
| | - M A Vandelli
- Nanomedicine Group, Te.Far.T.I. center, Department of Life Sciences, University of Modena and Reggio Emilia , 41124 Modena, Italy
| | - M Zoli
- Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia , 41124 Modena, Italy
| | - F Forni
- Nanomedicine Group, Te.Far.T.I. center, Department of Life Sciences, University of Modena and Reggio Emilia , 41124 Modena, Italy
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10
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Investigation of size, surface charge, PEGylation degree and concentration on the cellular uptake of polymer nanoparticles. Colloids Surf B Biointerfaces 2014; 123:639-47. [DOI: 10.1016/j.colsurfb.2014.10.003] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2014] [Revised: 09/21/2014] [Accepted: 10/02/2014] [Indexed: 12/22/2022]
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11
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Höcherl A, Landfester K, Mailänder V. Absolute quantitation of sub-micrometer particles in cells by flow cytometry. Macromol Biosci 2013; 13:1568-75. [PMID: 23966275 DOI: 10.1002/mabi.201300182] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2013] [Revised: 06/30/2013] [Indexed: 11/09/2022]
Abstract
Absolute quantitative measurements of nanoparticle (NP) uptake are a prerequisite to determine doses of NPs in pharmacological and toxicological studies. However, absolute quantitation is rarely reported, hindering the comparison between different studies. Here, a new flow cytometric approach is presented to analyze fluorescent NPs with a "standard" non-scanning flow cytometer and to quantify them inside cells. The mean fluorescence intensity of a single particle and the particle concentration (NPs per μL medium) are obtained. A routine for rapid quantitative counting of the endocytosed NPs in HeLa cells by flow cytometry (FC) is developed and validated by confocal laser scanning microscopy. As a proof-of-concept, the quantitative measurements show that the cellular uptake efficiency of negatively charged poly(methyl methacrylate) NPs is very low, that is, in the range of 10(-3) % of the added particle amount.
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Affiliation(s)
- Anita Höcherl
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55129, Mainz, Germany
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12
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Lerch S, Dass M, Musyanovych A, Landfester K, Mailänder V. Polymeric nanoparticles of different sizes overcome the cell membrane barrier. Eur J Pharm Biopharm 2013; 84:265-74. [DOI: 10.1016/j.ejpb.2013.01.024] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2012] [Revised: 01/02/2013] [Accepted: 01/29/2013] [Indexed: 10/27/2022]
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13
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Martínez-Tong DE, Soccio M, Sanz A, García C, Ezquerra TA, Nogales A. Chain Arrangement and Glass Transition Temperature Variations in Polymer Nanoparticles under 3D-Confinement. Macromolecules 2013. [DOI: 10.1021/ma400379a] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
| | - Michelina Soccio
- Instituto de Estructura de la Materia, IEM-CSIC, C/Serrano 121, Madrid 28006, Spain
| | - Alejandro Sanz
- Instituto de Estructura de la Materia, IEM-CSIC, C/Serrano 121, Madrid 28006, Spain
| | - Carolina García
- Instituto de Química Física Rocasolano, IQFR-CSIC, C/Serrano 119, Madrid 28006, Spain
| | - Tiberio A. Ezquerra
- Instituto de Estructura de la Materia, IEM-CSIC, C/Serrano 121, Madrid 28006, Spain
| | - Aurora Nogales
- Instituto de Estructura de la Materia, IEM-CSIC, C/Serrano 121, Madrid 28006, Spain
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14
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Vranic S, Boggetto N, Contremoulins V, Mornet S, Reinhardt N, Marano F, Baeza-Squiban A, Boland S. Deciphering the mechanisms of cellular uptake of engineered nanoparticles by accurate evaluation of internalization using imaging flow cytometry. Part Fibre Toxicol 2013; 10:2. [PMID: 23388071 PMCID: PMC3599262 DOI: 10.1186/1743-8977-10-2] [Citation(s) in RCA: 146] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2012] [Accepted: 02/03/2013] [Indexed: 01/08/2023] Open
Abstract
Background The uptake of nanoparticles (NPs) by cells remains to be better characterized in order to understand the mechanisms of potential NP toxicity as well as for a reliable risk assessment. Real NP uptake is still difficult to evaluate because of the adsorption of NPs on the cellular surface. Results Here we used two approaches to distinguish adsorbed fluorescently labeled NPs from the internalized ones. The extracellular fluorescence was either quenched by Trypan Blue or the uptake was analyzed using imaging flow cytometry. We used this novel technique to define the inside of the cell to accurately study the uptake of fluorescently labeled (SiO2) and even non fluorescent but light diffracting NPs (TiO2). Time course, dose-dependence as well as the influence of surface charges on the uptake were shown in the pulmonary epithelial cell line NCI-H292. By setting up an integrative approach combining these flow cytometric analyses with confocal microscopy we deciphered the endocytic pathway involved in SiO2 NP uptake. Functional studies using energy depletion, pharmacological inhibitors, siRNA-clathrin heavy chain induced gene silencing and colocalization of NPs with proteins specific for different endocytic vesicles allowed us to determine macropinocytosis as the internalization pathway for SiO2 NPs in NCI-H292 cells. Conclusion The integrative approach we propose here using the innovative imaging flow cytometry combined with confocal microscopy could be used to identify the physico-chemical characteristics of NPs involved in their uptake in view to redesign safe NPs.
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Affiliation(s)
- Sandra Vranic
- Univ Paris Diderot, Sorbonne Paris Cité, Laboratory of Molecular and Cellular Responses to Xenobiotics, Unit of Functional and Adaptive Biology (BFA) EAC CNRS 4413, 5 rue Thomas Mann, Paris 75 013, France.
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15
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Kelsch A, Tomcin S, Rausch K, Barz M, Mailänder V, Schmidt M, Landfester K, Zentel R. HPMA Copolymers as Surfactants in the Preparation of Biocompatible Nanoparticles for Biomedical Application. Biomacromolecules 2012. [DOI: 10.1021/bm301453g] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Annette Kelsch
- Institute of Organic
Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, 55128 Mainz, Germany
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz,
Germany
| | - Stephanie Tomcin
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz,
Germany
| | - Kristin Rausch
- Institute
of Physical
Chemistry, Johannes Gutenberg-University Mainz, Jakob-Welder-Weg 11, 55128 Mainz, Germany
| | - Matthias Barz
- Institute of Organic
Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Volker Mailänder
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz,
Germany
- III. Medical Clinic, University Medicine of the Johannes Gutenberg University, Langenbeckstr. 1, 55131 Mainz, Germany
| | - Manfred Schmidt
- Institute
of Physical
Chemistry, Johannes Gutenberg-University Mainz, Jakob-Welder-Weg 11, 55128 Mainz, Germany
| | - Katharina Landfester
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz,
Germany
| | - Rudolf Zentel
- Institute of Organic
Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, 55128 Mainz, Germany
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