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JAUDOIN C, GRILLO I, COUSIN F, GEHRKE M, OULDALI M, ARTENI AA, PICTON L, RIHOUEY C, SIMELIERE F, BOCHOT A, AGNELY F. Hybrid systems combining liposomes and entangled hyaluronic acid chains: influence of liposome surface and drug encapsulation on the microstructure. J Colloid Interface Sci 2022; 628:995-1007. [DOI: 10.1016/j.jcis.2022.07.146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 06/24/2022] [Accepted: 07/23/2022] [Indexed: 10/16/2022]
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2
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Sciolla F, Truzzolillo D, Chauveau E, Trabalzini S, Di Marzio L, Carafa M, Marianecci C, Sarra A, Bordi F, Sennato S. Influence of drug/lipid interaction on the entrapment efficiency of isoniazid in liposomes for antitubercular therapy: a multi-faced investigation. Colloids Surf B Biointerfaces 2021; 208:112054. [PMID: 34454365 DOI: 10.1016/j.colsurfb.2021.112054] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 07/16/2021] [Accepted: 08/16/2021] [Indexed: 10/20/2022]
Abstract
Isoniazid (INH) is one of the primary drugs used in tuberculosis treatment and its encapsulation in liposomal vesicles can both improve its therapeutic index and minimize toxicity. Here we consider mixtures of hydrogenated soy phosphatidylcholine-phosphatidylglycerol (HSPC-DPPG) to get novel biocompatible liposomes for INH delivery. We determined INH encapsulation efficiency by coupling for the first time UV and Laser Transmission Spectroscopy and we showed that HSPC-DPPG liposomes can load more INH than expected from simple geometrical arguments, thus suggesting the presence of drug-lipid association. To focus on this aspect, which has never been explored in liposomal formulations, we employed several complementary techniques, such as dynamic and static light scattering, calorimetry and surface pressure measurements on lipid monolayers. We find that INH-lipid interaction increases the entrapment capability of liposomes due to INH adsorption. Moreover, the preferential INH-HSPC dipole-dipole interaction promotes the modification of lipid ordering, favoring the formation of HSPC-richer domains in excess of DPPG. Our findings highlight how investigating the fundamental aspects of drug-lipid interactions is of paramount importance for the optimal design of liposomal nanocarriers.
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Affiliation(s)
| | - Domenico Truzzolillo
- Laboratoire Charles Coulomb (L2C) - UMR 5221, Universitè de Montpellier et CNRS, Place E. Bataillon, Campus Triolet, Batiment 11, cc 0026, 34095 Montpellier Cedex 05, France.
| | - Edouard Chauveau
- Laboratoire Charles Coulomb (L2C) - UMR 5221, Universitè de Montpellier et CNRS, Place E. Bataillon, Campus Triolet, Batiment 11, cc 0026, 34095 Montpellier Cedex 05, France
| | - Silvia Trabalzini
- Dipartimento di Chimica e Tecnologie farmaceutiche, Università di Roma, Piazzale A. Moro 5, I-00185 Rome, Italy
| | - Luisa Di Marzio
- Dipartimento di Farmacia, Università G.d'Annunzio, Via dei Vestini, 66100 Chieti, Italy
| | - Maria Carafa
- Dipartimento di Chimica e Tecnologie farmaceutiche, Università di Roma, Piazzale A. Moro 5, I-00185 Rome, Italy
| | - Carlotta Marianecci
- Dipartimento di Chimica e Tecnologie farmaceutiche, Università di Roma, Piazzale A. Moro 5, I-00185 Rome, Italy
| | - Angelo Sarra
- CNR-ISC Sede Sapienza, Piazzale A. Moro 2, I-00185 Rome, Italy
| | - Federico Bordi
- CNR-ISC Sede Sapienza, Piazzale A. Moro 2, I-00185 Rome, Italy; Dipartimento di Fisica, La Sapienza Università di Roma, Piazzale A. Moro 2, I-00185 Rome, Italy
| | - Simona Sennato
- CNR-ISC Sede Sapienza, Piazzale A. Moro 2, I-00185 Rome, Italy; Dipartimento di Fisica, La Sapienza Università di Roma, Piazzale A. Moro 2, I-00185 Rome, Italy.
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3
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Sennato S, Chauveau E, Casciardi S, Bordi F, Truzzolillo D. The Double-Faced Electrostatic Behavior of PNIPAm Microgels. Polymers (Basel) 2021; 13:1153. [PMID: 33916554 PMCID: PMC8038440 DOI: 10.3390/polym13071153] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 03/29/2021] [Accepted: 03/31/2021] [Indexed: 01/29/2023] Open
Abstract
PNIPAm microgels synthesized via free radical polymerization (FRP) are often considered as neutral colloids in aqueous media, although it is well known, since the pioneering works of Pelton and coworkers, that the vanishing electrophoretic mobility characterizing swollen microgels largely increases above the lower critical solution temperature (LCST) of PNIPAm, at which microgels partially collapse. The presence of an electric charge has been attributed to the ionic initiators that are employed when FRP is performed in water and that stay anchored to microgel particles. Combining dynamic light scattering (DLS), electrophoresis, transmission electron microscopy (TEM) and atomic force microscopy (AFM) experiments, we show that collapsed ionic PNIPAm microgels undergo large mobility reversal and reentrant condensation when they are co-suspended with oppositely charged polyelectrolytes (PE) or nanoparticles (NP), while their stability remains unaffected by PE or NP addition at lower temperatures, where microgels are swollen and their charge density is low. Our results highlight a somehow double-faced electrostatic behavior of PNIPAm microgels due to their tunable charge density: they behave as quasi-neutral colloids at temperature below LCST, while they strongly interact with oppositely charged species when they are in their collapsed state. The very similar phenomenology encountered when microgels are surrounded by polylysine chains and silica nanoparticles points to the general character of this twofold behavior of PNIPAm-based colloids in water.
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Affiliation(s)
- Simona Sennato
- CNR-ISC Sede Sapienza and Dipartimento di Fisica, Sapienza Università di Roma, P.le A. Moro 2, 00185 Rome, Italy;
| | - Edouard Chauveau
- Laboratoire Charles Coulomb (L2C), UMR 5221 CNRS-Université de Montpellier, F-34095 Montpellier, France;
| | - Stefano Casciardi
- Department of Occupational and Environmental Medicine, Epidemiology and Hygiene, National Institute for Insurance against Accidents at Work (INAIL), 00078 Monte Porzio Catone (Rome), Italy;
| | - Federico Bordi
- CNR-ISC Sede Sapienza and Dipartimento di Fisica, Sapienza Università di Roma, P.le A. Moro 2, 00185 Rome, Italy;
| | - Domenico Truzzolillo
- Laboratoire Charles Coulomb (L2C), UMR 5221 CNRS-Université de Montpellier, F-34095 Montpellier, France;
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4
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Ponti F, Campolungo M, Melchiori C, Bono N, Candiani G. Cationic lipids for gene delivery: many players, one goal. Chem Phys Lipids 2021; 235:105032. [PMID: 33359210 DOI: 10.1016/j.chemphyslip.2020.105032] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 11/23/2020] [Accepted: 12/19/2020] [Indexed: 12/28/2022]
Abstract
Lipid-based carriers represent the most widely used alternative to viral vectors for gene expression and gene silencing purposes. This class of non-viral vectors is particularly attractive for their ease of synthesis and chemical modifications to endow them with desirable properties. Despite combinatorial approaches have led to the generation of a large number of cationic lipids displaying different supramolecular structures and improved behavior, additional effort is needed towards the development of more and more effective cationic lipids for transfection purposes. With this review, we seek to highlight the great progress made in the design of each and every constituent domain of cationic lipids, that is, the chemical structure of the headgroup, linker and hydrophobic moieties, and on the specific effect on the assembly with nucleic acids. Since the complexity of such systems is known to affect their performances, the role of formulation, stability and phase behavior on the transfection efficiency of such assemblies will be thoroughly discussed. Our objective is to provide a conceptual framework for the development of ever more performing lipid gene delivery vectors.
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Affiliation(s)
- Federica Ponti
- GenT LΛB, Dept. of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, 20131, Milan, Italy; Laboratory for Biomaterials and Bioengineering, Canada Research Chair I in Biomaterials and Bioengineering for the Innovation in Surgery, Dept. Min-Met-Materials Engineering, Research Center of CHU de Quebec, Division of Regenerative Medicine, Laval University, Quebec City, QC, Canada
| | - Matilde Campolungo
- GenT LΛB, Dept. of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, 20131, Milan, Italy
| | - Clara Melchiori
- GenT LΛB, Dept. of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, 20131, Milan, Italy
| | - Nina Bono
- GenT LΛB, Dept. of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, 20131, Milan, Italy.
| | - Gabriele Candiani
- GenT LΛB, Dept. of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, 20131, Milan, Italy.
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5
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Gnopo YMD, Misra A, Hsu HL, DeLisa MP, Daniel S, Putnam D. Induced fusion and aggregation of bacterial outer membrane vesicles: Experimental and theoretical analysis. J Colloid Interface Sci 2020; 578:522-532. [PMID: 32540551 PMCID: PMC7487024 DOI: 10.1016/j.jcis.2020.04.068] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 04/16/2020] [Accepted: 04/17/2020] [Indexed: 11/15/2022]
Abstract
Recombinantly engineered bacterial outer membrane vesicles (OMVs) are promising vaccine delivery vehicles. The diversity of exogenous antigens delivered by OMVs can be enhanced by induced fusion of OMV populations. To date there are no reports of induced fusion of bacterial OMVs. Here we measure the pH and salt-induced aggregation and fusion of OMVs and analyze the processes against the Derjaguin-Landau-Verwey-Overbeek (DLVO) colloidal stability model. Vesicle aggregation and fusion kinetics were investigated for OMVs isolated from native E. coli (Nissle 1917) and lipopolysaccharide (LPS) modified E. coli (ClearColi) strains to evaluate the effect of lipid type on vesicle aggregation and fusion. Electrolytes and low pHs induced OMV aggregation for both native and modified LPS constructs, approaching a calculated fusion efficiency of ~25% (i.e. ~1/4 of collision events lead to fusion). However, high fusion efficiency was achieved for Nissle OMVs solely with decreased pH as opposed to a combination of low pH and increased divalent counterion concentration for ClearColi OMVs. The lipid composition of the OMVs from Nissle negatively impacted fusion in the presence of electrolytes, causing higher deviations from DLVO-predicted critical coagulation concentrations with monovalent counterions. The outcome of the work is a defined set of conditions under which investigators can induce OMVs to fuse and make various combinations of vesicle compositions.
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Affiliation(s)
- Yehou M D Gnopo
- Robert F. Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY 14853, USA
| | - Aditya Misra
- Robert F. Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY 14853, USA
| | - Hung-Lun Hsu
- Robert F. Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY 14853, USA
| | - Matthew P DeLisa
- Robert F. Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY 14853, USA
| | - Susan Daniel
- Robert F. Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY 14853, USA
| | - David Putnam
- Robert F. Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY 14853, USA; Nancy E. and Peter C. Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY 14853, USA.
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6
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Caetano DLZ, de Carvalho SJ, Metzler R, Cherstvy AG. Critical adsorption of multiple polyelectrolytes onto a nanosphere: splitting the adsorption-desorption transition boundary. J R Soc Interface 2020; 17:20200199. [PMID: 32574545 PMCID: PMC7328387 DOI: 10.1098/rsif.2020.0199] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 06/03/2020] [Indexed: 01/09/2023] Open
Abstract
Employing extensive Monte Carlo computer simulations, we investigate in detail the properties of multichain adsorption of charged flexible polyelectrolytes (PEs) onto oppositely charged spherical nanoparticles (SNPs). We quantify the conditions of critical adsorption-the phase-separation curve between the adsorbed and desorbed states of the PEs-as a function of the SNP surface-charge density and the concentration of added salt. We study the degree of fluctuations of the PE-SNP electrostatic binding energy, which we use to quantify the emergence of the phase subtransitions, including a series of partially adsorbed PE configurations. We demonstrate how the phase-separation adsorption-desorption boundary shifts and splits into multiple subtransitions at low-salt conditions, thereby generalizing and extending the results for critical adsorption of a single PE onto the SNP. The current findings are relevant for finite concentrations of PEs around the attracting SNP, such as the conditions for PE adsorption onto globular proteins carrying opposite electric charges.
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Affiliation(s)
- Daniel L. Z. Caetano
- São Paulo State University (UNESP), Institute of Biosciences, Humanities and Exact Sciences, Campus São José do Rio Preto, 15054-000 Brazil
- Institute of Chemistry, State University of Campinas (UNICAMP), 13083-970 Campinas, Brazil
- Center for Computational Engineering and Sciences, State University of Campinas (UNICAMP), 13083-970 Campinas, Brazil
| | - Sidney J. de Carvalho
- São Paulo State University (UNESP), Institute of Biosciences, Humanities and Exact Sciences, Campus São José do Rio Preto, 15054-000 Brazil
| | - Ralf Metzler
- Institute for Physics and Astronomy, University of Potsdam, 14476 Potsdam-Golm, Germany
| | - Andrey G. Cherstvy
- Institute for Physics and Astronomy, University of Potsdam, 14476 Potsdam-Golm, Germany
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7
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Chang R, Cai W, Ji N, Li M, Wang Y, Xu X, Dai L, Xiong L, Sun Q. Fabrication and characterization of hollow starch nanoparticles by heterogeneous crystallization of debranched starch in a nanoemulsion system. Food Chem 2020; 323:126851. [PMID: 32334318 DOI: 10.1016/j.foodchem.2020.126851] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 03/21/2020] [Accepted: 04/17/2020] [Indexed: 11/21/2022]
Abstract
The development of hollow nanoparticles has attracted widespread interest due to their potential commercial applications. This work aimed to prepare a novel hollow starch nanoparticles (HSNPs) from debranched waxy corn starch (DBS) via an oil-in-water (O/W) emulsion templating method. The effects of different concentrations of DBS on the formation of HSNPs at 4 °C and 25 °C were investigated. The monodispersed HSNPs obtained with 0.5% concentrations of DBS at 25 °C had spherical shapes, ranging between 200 and 800 nm. HSNPs with relative crystallinities of 16.9%-29.7% exhibited V-type or B + V-type structures, which indicated that DBS at low concentrations (0.5%-2.0%) could recrystallize and concomitantly form starch-lipid complexes around emulsion droplets. This novel approach of preparing HSNPs is viable and simple. The developed HSNPs could have great potential for delivering drugs or active ingredients.
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Affiliation(s)
- Ranran Chang
- College of Food Science and Engineering, Qingdao Agricultural University, 266109, 700 Changcheng Road, Chengyang District, Qingdao, China
| | - Wei Cai
- College of Food Science and Engineering, Qingdao Agricultural University, 266109, 700 Changcheng Road, Chengyang District, Qingdao, China
| | - Na Ji
- College of Food Science and Engineering, Qingdao Agricultural University, 266109, 700 Changcheng Road, Chengyang District, Qingdao, China
| | - Man Li
- College of Food Science and Engineering, Qingdao Agricultural University, 266109, 700 Changcheng Road, Chengyang District, Qingdao, China
| | - Yanfei Wang
- College of Food Science and Engineering, Qingdao Agricultural University, 266109, 700 Changcheng Road, Chengyang District, Qingdao, China
| | - Xingfeng Xu
- College of Food Science and Engineering, Qingdao Agricultural University, 266109, 700 Changcheng Road, Chengyang District, Qingdao, China
| | - Lei Dai
- College of Food Science and Engineering, Qingdao Agricultural University, 266109, 700 Changcheng Road, Chengyang District, Qingdao, China
| | - Liu Xiong
- College of Food Science and Engineering, Qingdao Agricultural University, 266109, 700 Changcheng Road, Chengyang District, Qingdao, China
| | - Qingjie Sun
- College of Food Science and Engineering, Qingdao Agricultural University, 266109, 700 Changcheng Road, Chengyang District, Qingdao, China.
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8
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Chang R, Ji N, Li M, Qiu L, Sun C, Bian X, Qiu H, Xiong L, Sun Q. Green preparation and characterization of starch nanoparticles using a vacuum cold plasma process combined with ultrasonication treatment. ULTRASONICS SONOCHEMISTRY 2019; 58:104660. [PMID: 31450355 DOI: 10.1016/j.ultsonch.2019.104660] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 06/13/2019] [Accepted: 06/26/2019] [Indexed: 05/24/2023]
Abstract
In this study, starch nanoparticles (SNPs) were fabricated via a facile and green method involving a vacuum low-temperature plasma process combined with rapid ultrasonication treatment using waxy corn starch (WCS) and potato starch (PS). Morphology, size, crystalline structure, thermal property, and stability analyses of the SNPs were systematically performed. The obtained SNPs exhibited good uniformity and almost perfect spherical and square shapes. The zeta potential and Fourier transform infrared spectroscopy results confirmed that the SNPs were covered with negative carboxyl groups (zeta potential ranging from -21.8 ± 1.06 to -9.78 ± 0.89 mV). The gelatinization enthalpy of SNPs from PS significantly decreased, changing from 16.63 ± 0.91 to 9.81 ± 0.19 J/g. However, the crystal patterns of SNPs from the WCS and PS after plasma and ultrasonic treatments did not change. The crystallinity of SNPs from PS decreased from 45.2% to 16.5%. This novel approach to preparing SNPs is low cost, simple and green. The developed SNPs could have great potential in the food, biomedical, and material industries.
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Affiliation(s)
- Ranran Chang
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao, Shandong Province 266109, China
| | - Na Ji
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao, Shandong Province 266109, China
| | - Man Li
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao, Shandong Province 266109, China
| | - Lizhong Qiu
- Zhucheng Xingmao Corn Developing Co., Ltd, Weifang, Shandong Province 262200, China
| | - Chunrui Sun
- Zhucheng Xingmao Corn Developing Co., Ltd, Weifang, Shandong Province 262200, China
| | - Xiliang Bian
- Zhucheng Xingmao Corn Developing Co., Ltd, Weifang, Shandong Province 262200, China
| | - Hongwei Qiu
- Zhucheng Xingmao Corn Developing Co., Ltd, Weifang, Shandong Province 262200, China
| | - Liu Xiong
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao, Shandong Province 266109, China
| | - Qingjie Sun
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao, Shandong Province 266109, China.
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9
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Wang Y, Ye M, Xie R, Gong S. Enhancing the In Vitro and In Vivo Stabilities of Polymeric Nucleic Acid Delivery Nanosystems. Bioconjug Chem 2019; 30:325-337. [PMID: 30592619 PMCID: PMC6941189 DOI: 10.1021/acs.bioconjchem.8b00749] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Gene therapy holds great promise for various medical and biomedical applications. Nonviral gene delivery systems formed by cationic polymer and nucleic acids (e.g., polyplexes) have been extensively investigated for targeted gene therapy; however, their in vitro and in vivo stability is affected by both their intrinsic properties such as chemical compositions (e.g., polymer molecular weight and structure, and N/P ratio) and a number of environmental factors (e.g., shear stress during circulation in the bloodstream, interaction with the serum proteins, and physiological ionic strength). In this review, we surveyed the effects of a number of important intrinsic and environmental factors on the stability of polymeric gene delivery systems, and discussed various strategies to enhance the stability of polymeric gene delivery systems, thereby enabling efficient gene delivery into target cells. Future opportunities and challenges of polymeric nucleic acid delivery nanosystems were also briefly discussed.
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Affiliation(s)
- Yuyuan Wang
- Department of Materials Science and Engineering, University of Wisconsin–Madison, Madison, Wisconsin 53715, United States
- Wisconsin Institute for Discovery, University of Wisconsin–Madison, Madison, Wisconsin 53715, United States
| | - Mingzhou Ye
- Wisconsin Institute for Discovery, University of Wisconsin–Madison, Madison, Wisconsin 53715, United States
- Department of Biomedical Engineering, University of Wisconsin–Madison, Madison, Wisconsin 53715, United States
| | - Ruosen Xie
- Department of Materials Science and Engineering, University of Wisconsin–Madison, Madison, Wisconsin 53715, United States
- Wisconsin Institute for Discovery, University of Wisconsin–Madison, Madison, Wisconsin 53715, United States
| | - Shaoqin Gong
- Department of Materials Science and Engineering, University of Wisconsin–Madison, Madison, Wisconsin 53715, United States
- Wisconsin Institute for Discovery, University of Wisconsin–Madison, Madison, Wisconsin 53715, United States
- Department of Biomedical Engineering, University of Wisconsin–Madison, Madison, Wisconsin 53715, United States
- Department of Chemistry, University of Wisconsin–Madison, Madison, Wisconsin 53715, United States
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10
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Yaroslavov AA, Sybachin AV, Efimova AA. Stabilization of electrostatic polymer-colloid complexes. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.08.042] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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11
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Yaroslavov AA, Sybachin AV, Sandzhieva AV, Zaborova OV. Multifunctional Containers from Anionic Liposomes and Cationic Polymers/Colloids. POLYMER SCIENCE SERIES C 2018. [DOI: 10.1134/s1811238218020224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Truzzolillo D, Sennato S, Sarti S, Casciardi S, Bazzoni C, Bordi F. Overcharging and reentrant condensation of thermoresponsive ionic microgels. SOFT MATTER 2018; 14:4110-4125. [PMID: 29664092 PMCID: PMC5968447 DOI: 10.1039/c7sm02357j] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
We investigated the complexation of thermoresponsive anionic poly(N-isopropylacrylamide) (PNiPAM) microgels and cationic ε-polylysine (ε-PLL) chains. By combining electrophoresis, light scattering, transmission electron microscopy (TEM) and dielectric spectroscopy (DS) we studied the adsorption of ε-PLL onto microgel networks and its effect on the stability of suspensions. We show that the volume phase transition (VPT) of microgels triggers a large polyion adsorption. Two interesting phenomena with unique features occur: a temperature-dependent microgel overcharging and a complex reentrant condensation. The latter may occur at fixed polyion concentration, when temperature is raised above the VPT of microgels, or by increasing the number density of polycations at fixed temperature. TEM and DS measurements unambiguously show that short PLL chains adsorb onto microgels and act as electrostatic glue above the VPT. By performing thermal cycles, we further show that polyion-induced clustering is a quasi-reversible process: within the time of our experiments large clusters form above the VPT and partially re-dissolve as the mixtures are cooled down. Finally we give a proof that the observed phenomenology is purely electrostatic in nature: an increase of the ionic strength gives rise to polyion desorption from the microgel outer shell.
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Affiliation(s)
- Domenico Truzzolillo
- Laboratoire Charles Coulomb (L2C), UMR 5221 CNRS-Université de Montpellier , 4 F-34095 Montpellier , France .
| | - Simona Sennato
- CNR-ISC UOS Roma, c/o Dipartimento di Fisica, Sapienza Università di Roma , P.le A. Moro 2 , 00185 Roma , Italy
| | - Stefano Sarti
- Dipartimento di Fisica, Sapienza Università di Roma , P.zzle A. Moro 2 , 00185 Roma , Italy .
| | - Stefano Casciardi
- National Institute for Insurance against Accidents at Work (INAIL Research), Department of Occupational and Environmental Medicine, Epidemiology and Hygiene , Roma , Italy
| | - Chiara Bazzoni
- Dipartimento di Fisica, Sapienza Università di Roma , P.zzle A. Moro 2 , 00185 Roma , Italy .
| | - Federico Bordi
- CNR-ISC UOS Roma, c/o Dipartimento di Fisica, Sapienza Università di Roma , P.le A. Moro 2 , 00185 Roma , Italy
- Dipartimento di Fisica, Sapienza Università di Roma , P.zzle A. Moro 2 , 00185 Roma , Italy .
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13
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Nunes SC, Cova TFGG, Dias RS, Pais AACC. Adsorption of charged macromolecules upon multicomponent responsive surfaces. Phys Chem Chem Phys 2018; 20:19811-19818. [DOI: 10.1039/c8cp03383h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A predictive model for polyelectrolyte adsorption upon responsive surfaces is presented, decoupling the effect of surface charges and crowders.
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Affiliation(s)
- Sandra C.C. Nunes
- Coimbra Chemistry Center
- CQC
- Faculty of Science and Technology
- University of Coimbra
- Portugal
| | - Tânia F. G. G. Cova
- Coimbra Chemistry Center
- CQC
- Faculty of Science and Technology
- University of Coimbra
- Portugal
| | - Rita S. Dias
- Department of Physics
- NTNU – Norwegian University of Science and Technology
- NO-7491 Trondheim
- Norway
| | - Alberto A. C. C. Pais
- Coimbra Chemistry Center
- CQC
- Faculty of Science and Technology
- University of Coimbra
- Portugal
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14
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Caetano DLZ, de Carvalho SJ, Metzler R, Cherstvy AG. Critical adsorption of periodic and random polyampholytes onto charged surfaces. Phys Chem Chem Phys 2017; 19:23397-23413. [PMID: 28825753 DOI: 10.1039/c7cp04040g] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
How different are the properties of critical adsorption of polyampholytes and polyelectrolytes onto charged surfaces? How important are the details of polyampholyte charge distribution on the onset of critical adsorption transition? What are the scaling relations governing the dependence of critical surface charge density on salt concentration in the surrounding solution? Here, we employ Metropolis Monte Carlo simulations and uncover the scaling relations for critical adsorption for quenched periodic and random charge distributions along the polyampholyte chains. We also evaluate and discuss the dependence of the adsorbed layer width on solution salinity and details of the charge distribution. We contrast our findings to the known results for polyelectrolyte adsorption onto oppositely charged surfaces, in particular, their dependence on electrolyte concentration.
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Affiliation(s)
- Daniel L Z Caetano
- Sao Paulo State University (UNESP), Institute of Biosciences, Humanities and Exact Sciences (Ibilce), Campus Sao Jose do Rio Preto, 15054-000, Brazil.
| | - Sidney J de Carvalho
- Sao Paulo State University (UNESP), Institute of Biosciences, Humanities and Exact Sciences (Ibilce), Campus Sao Jose do Rio Preto, 15054-000, Brazil.
| | - Ralf Metzler
- Institute for Physics & Astronomy, University of Potsdam, 14476 Potsdam-Golm, Germany.
| | - Andrey G Cherstvy
- Institute for Physics & Astronomy, University of Potsdam, 14476 Potsdam-Golm, Germany.
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15
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Chang R, Yang J, Ge S, Zhao M, Liang C, Xiong L, Sun Q. Synthesis and self-assembly of octenyl succinic anhydride modified short glucan chains based amphiphilic biopolymer: Micelles, ultrasmall micelles, vesicles, and lutein encapsulation/release. Food Hydrocoll 2017. [DOI: 10.1016/j.foodhyd.2016.12.023] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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16
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17
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Kashcooli Y, Park K, Bose A, Greenfield M, Bothun GD. Patchy Layersomes Formed by Layer-by-Layer Coating of Liposomes with Strong Biopolyelectrolytes. Biomacromolecules 2016; 17:3838-3844. [DOI: 10.1021/acs.biomac.6b01467] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Yaser Kashcooli
- Department
of Chemical Engineering, University of Rhode Island, 16 Greenhouse
Road, Kingston, Rhode Island 02881, United States
| | - Keunhan Park
- Department
of Mechanical Engineering, University of Utah, 1495 E 100 S, Salt Lake City, Utah 84112, United States
| | - Arijit Bose
- Department
of Chemical Engineering, University of Rhode Island, 16 Greenhouse
Road, Kingston, Rhode Island 02881, United States
| | - Michael Greenfield
- Department
of Chemical Engineering, University of Rhode Island, 16 Greenhouse
Road, Kingston, Rhode Island 02881, United States
| | - Geoffrey D. Bothun
- Department
of Chemical Engineering, University of Rhode Island, 16 Greenhouse
Road, Kingston, Rhode Island 02881, United States
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