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Hao W, Chesnokov YM, Molchanov VS, Podlesnyi PR, Kuklin AI, Skoi VV, Philippova OE. Cryo-electron tomography study of the evolution of wormlike micelles to saturated networks and perforated vesicles. J Colloid Interface Sci 2024; 672:431-445. [PMID: 38850868 DOI: 10.1016/j.jcis.2024.06.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2024] [Revised: 06/02/2024] [Accepted: 06/02/2024] [Indexed: 06/10/2024]
Abstract
HYPOTHESIS The formation of micellar aggregates and the changes in their morphology are crucial for numerous practical applications of surfactants. However, a proper structural characterization of complicated micellar nanostructures remains a challenge. This paper demonstrates the advances of cryo-electron tomography (cryo-ET) in revealing the structural characteristics that accompany the evolution of surfactant aggregates. EXPERIMENTS By using cryo-ET in combination with cryo-transmission electron microscopy (cryo-TEM), small-angle neutron scattering (SANS), and rheometry, studies were carried out on a model system composed of zwitterionic and nonionic surfactants. In this system, the molecular packing parameter was increased gradually by increasing the molar fraction of nonionic surfactant. FINDINGS A series of structural transformations was observed: linear wormlike micelles (WLMs) → branched WLMs → saturated network of multiconnected WLMs → perforated vesicles (stomatosomes). The transformations occur through an increase in the number of branches at the expense of cylindrical subchains and semispherical endcaps. Exponential distribution of subchains length was confirmed experimentally for multiconnected saturated networks. The stomatosomes were formed when the length of subchains becomes much shorter than the persistence length, causing the three-dimensional (3D) structure to transform into a two-dimensional (2D) membrane. This work identifies the mechanism of the structural changes, which can be further used to design various surfactant self-assemblies.
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Affiliation(s)
- Wuyi Hao
- Physics Department, Moscow State University, 119991 Moscow, Russia
| | - Yuri M Chesnokov
- National Research Center "Kurchatov Institute", 123182, Moscow, Russia
| | | | - Pavel R Podlesnyi
- National Research Center "Kurchatov Institute", 123182, Moscow, Russia
| | | | - Vadim V Skoi
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
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2
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Subraveti SN, Nader MG, AziziHariri P, John VT, Lamichhane N, Raghavan SR. Vesicle-micelle transitions driven by ROS, light and heat. NANOSCALE 2024; 16:16942-16951. [PMID: 39207219 DOI: 10.1039/d4nr01543f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/04/2024]
Abstract
Vesicles are self-assembled nanocontainers (size ∼100 nm) in which solutes such as drugs can be encapsulated. There is great interest in triggering vesicle-micelle transitions (VMTs) because such transitions will result in the release of encapsulated solute. Here, we focus on reactive oxygen species (ROS) as a trigger for VMTs. ROS arise in our body within cells, and ROS levels are known to be high near a tumor. Thus, ROS-responsive vesicles are of interest. We make such vesicles by combining the cationic amphiphile (4-phenylthiophenyl)diphenyl-sulfonium triflate (PDST), and the anionic surfactant sodium dodecylbenzene sulfonate (SDBS). By simply mixing these two commercially available molecules in water, we prepare 'catanionic' vesicles in an easy, low-cost, and scalable way. When exposed to ROS such as hydrogen peroxide (H2O2), the thioether in the PDST tail gets oxidized to a hydrophilic sulfoxide. As a result, the vesicles are transformed into spherical or short, cylindrical micelles. Evidence for the VMT comes from turbidity, light scattering, and cryo-TEM measurements. The same vesicles are also sensitive to other stimuli, specifically light and temperature: i.e., a VMT can also be induced by irradiation with UV light or heating above a critical temperature. We explain the origin of the VMT in each case based on changes in the driving forces for amphiphile assembly.
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Affiliation(s)
- Sai Nikhil Subraveti
- Department of Chemical & Biomolecular Engineering, University of Maryland, College Park, Maryland 20742, USA.
| | - Morine G Nader
- Department of Chemical & Biomolecular Engineering, University of Maryland, College Park, Maryland 20742, USA.
| | - Pedram AziziHariri
- Department of Chemical & Biomolecular Engineering, Tulane University, New Orleans, LA 70118, USA
| | - Vijay T John
- Department of Chemical & Biomolecular Engineering, Tulane University, New Orleans, LA 70118, USA
| | - Narottam Lamichhane
- Department of Radiation Oncology, University of Maryland School of Medicine, Baltimore, Maryland 21201, USA.
| | - Srinivasa R Raghavan
- Department of Chemical & Biomolecular Engineering, University of Maryland, College Park, Maryland 20742, USA.
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3
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Roussel T, Ferry D, Kosta A, Miele D, Sandri G, Tansi FL, Steiniger F, Southern P, Pankhurst QA, Peng L, Giorgio S. Insight into the Internal Structure of High-Performance Multicore Magnetic Nanoparticles Used in Cancer Thermotherapy. ACS MATERIALS AU 2024; 4:489-499. [PMID: 39280813 PMCID: PMC11393931 DOI: 10.1021/acsmaterialsau.4c00021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Revised: 06/11/2024] [Accepted: 06/11/2024] [Indexed: 09/18/2024]
Abstract
Multicore magnetic nanoparticles (MNPs), comprising iron oxide cores embedded in a sugar or starch matrix, are a class of nanomaterials with promising magnetic heating properties. Their internal structure, and particularly the strength of the internal core-core magnetic interactions, are believed to determine the functional properties, but there have been few detailed studies on this to date. We report here on an interlaboratory and multimodality transmission electron microscopy (TEM) and magnetic study of a high-performance MNP material (supplied by Resonant Circuits Limited, RCL) that is currently being used in a clinical study for the treatment of pancreatic cancer. TEM data were collected under a variety of conditions: conventional; high-resolution; scanning; cryogenic; and, for the first time, liquid phase. All the imaging modes showed mostly irregular dextran lamellae of lateral dimensions 30-90 nm, plus ca. 15% n/n of what appeared to be 30-60 nm long "nanorods", and a multitude of well-dispersed ca. 3.7 nm diameter iron oxide cores. Cryogenic electron tomography indicated that the nanorods were edge-on lamellae, but in dried samples, tomography showed rod- or lath-shaped forms, possibly resulting from the collapse of lamellae during drying. High-resolution TEM (HRTEM) showed the dextran to be crystallized in the low-temperature hydrated dextran polymorph. Magnetic remanence Henkel-plot analysis indicated a weak core-core interaction field of ca. 4.8 kA/m. Theoretical estimates using a point-dipole model associated this field with a core-to-core separation distance of ca. 5 nm, which tallies well with the ca. 4-6 nm range of separation distances observed in liquid-cell TEM data. On this basis, we identify the structure-function link in the RCL nanoparticles to be the unusually well-dispersed multicore structure that leads to their strong heating capability. This insight provides an important design characteristic for the future development of bespoke nanomaterials for this significant clinical application.
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Affiliation(s)
- Tom Roussel
- Aix-Marseille Université, CNRS, Centre Interdisciplinaire de Nanoscience de Marseille, Equipe Labellisée Ligue Contre le Cancer, 13288 Marseille, France
| | - Daniel Ferry
- Aix-Marseille Université, CNRS, Centre Interdisciplinaire de Nanoscience de Marseille, Equipe Labellisée Ligue Contre le Cancer, 13288 Marseille, France
| | - Artemis Kosta
- Aix-Marseille Université, CNRS, Institut de Microbiologie de la Méditerranée, 13009 Marseille, France
| | - Dalila Miele
- Department of Drug Sciences, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy
| | - Giuseppina Sandri
- Department of Drug Sciences, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy
| | - Felista L Tansi
- Department of Experimental Radiology, Institute of Diagnostic and Interventional Radiology, Jena University Hospital-Friedrich Schiller University Jena, Am Klinikum 1, 07747 Jena, Germany
| | - Frank Steiniger
- Center for Electron Microscopy, Jena University Hospital-Friedrich Schiller University Jena, Ziegelmuehlenweg 1, 07743 Jena, Germany
| | - Paul Southern
- UCL Healthcare Biomagnetics Laboratory, University College London, 21 Albemarle Street, London W1S 4BS, U.K
- Resonant Circuits Limited, 21 Albemarle Street, London W1S 4BS, U.K
| | - Quentin A Pankhurst
- UCL Healthcare Biomagnetics Laboratory, University College London, 21 Albemarle Street, London W1S 4BS, U.K
- Resonant Circuits Limited, 21 Albemarle Street, London W1S 4BS, U.K
| | - Ling Peng
- Aix-Marseille Université, CNRS, Centre Interdisciplinaire de Nanoscience de Marseille, Equipe Labellisée Ligue Contre le Cancer, 13288 Marseille, France
| | - Suzanne Giorgio
- Aix-Marseille Université, CNRS, Centre Interdisciplinaire de Nanoscience de Marseille, Equipe Labellisée Ligue Contre le Cancer, 13288 Marseille, France
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Zhou L, Wen H, Kuschnerus IC, Chang SLY. Efficientand Robust Automated Segmentation of Nanoparticles and Aggregates from Transmission Electron Microscopy Images with Highly Complex Backgrounds. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:1169. [PMID: 39057846 PMCID: PMC11279516 DOI: 10.3390/nano14141169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2024] [Revised: 06/26/2024] [Accepted: 07/02/2024] [Indexed: 07/28/2024]
Abstract
Morphologies of nanoparticles and aggregates play an important role in their properties for a range of applications. In particular, significant synthesis efforts have been directed toward controlling nanoparticle morphology and aggregation behavior in biomedical applications, as their size and shape have a significant impact on cellular uptake. Among several techniques for morphological characterization, transmission electron microscopy (TEM) can provide direct and accurate characterization of nanoparticle/aggregate morphology details. Nevertheless, manually analyzing a large number of TEM images is still a laborious process. Hence, there has been a surge of interest in employing machine learning methods to analyze nanoparticle size and shape. In order to achieve accurate nanoparticle analysis using machine learning methods, reliable and automated nanoparticle segmentation from TEM images is critical, especially when the nanoparticle image contrast is weak and the background is complex. These challenges are particularly pertinent in biomedical applications. In this work, we demonstrate an efficient, robust, and automated nanoparticle image segmentation method suitable for subsequent machine learning analysis. Our method is robust for noisy, low-electron-dose cryo-TEM images and for TEM cell images with complex, strong-contrast background features. Moreover, our method does not require any a priori training datasets, making it efficient and general. The ability to automatically, reliably, and efficiently segment nanoparticle/aggregate images is critical for advancing precise particle/aggregate control in biomedical applications.
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Affiliation(s)
- Lishi Zhou
- School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052, Australia; (L.Z.); (I.C.K.)
| | - Haotian Wen
- School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052, Australia; (L.Z.); (I.C.K.)
| | - Inga C. Kuschnerus
- School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052, Australia; (L.Z.); (I.C.K.)
- Electron Microscope Unit, Mark Wrainwright Analytical Centre, University of New South Wales, Sydney, NSW 2052, Australia
| | - Shery L. Y. Chang
- School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052, Australia; (L.Z.); (I.C.K.)
- Electron Microscope Unit, Mark Wrainwright Analytical Centre, University of New South Wales, Sydney, NSW 2052, Australia
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Pagureva N, Cholakova D, Mitrinova Z, Hristova M, Burdzhiev N, Tcholakova S. Temperature response of sucrose palmitate solutions: Role of ratio between monoesters and diesters. J Colloid Interface Sci 2024; 674:209-224. [PMID: 38925066 DOI: 10.1016/j.jcis.2024.06.061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Revised: 06/03/2024] [Accepted: 06/06/2024] [Indexed: 06/28/2024]
Abstract
HYPOTHESIS Aqueous solutions of long-chain water-soluble sucrose ester surfactants exhibit non-trivial response to temperature variations, revealing a peak in viscosity around 40-50 °C. While previous investigations have explored the structures within sucrose stearate systems at various constant temperatures, a comprehensive understanding of the entire temperature dependence and the underlying molecular factors, contributing to this phenomenon is currently missing. EXPERIMENTS Temperature dependent properties and supramolecular structures formed in aqueous solutions of commercial sucrose palmitate were examined using SAXS/WAXS, DSC, optical microscopy, rheological measurements, NMR, and cryo-TEM. FINDINGS The underlying mechanism governing this unusual behavior is revealed and is shown to relate to the mono- to di-esters ratio in the solutions. Solutions primarily containing sucrose monoesters (monoesters molecules ≳ 98% of all surfactant molecules) exhibit behavior typical of nonionic surfactants, with minimal changes with temperature. In contrast, the coexistence of mono- and di-esters results in the formation of discrete monodisperse diester particles and a network of partially fused diester particles at low temperature. As the temperature approaches the diesters' melting point, wormlike mixed micelles form, causing a viscosity peak. The height of this peak increases significantly with the diester concentration. Further temperature increase leads to fluidization of surfactant tails and formation of branched micelles, while excess diester molecules phase separate into distinct droplets.
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Affiliation(s)
- N Pagureva
- Department of Chemical and Pharmaceutical Engineering, Faculty of Chemistry and Pharmacy, Sofia University, 1164 Sofia, Bulgaria
| | - D Cholakova
- Department of Chemical and Pharmaceutical Engineering, Faculty of Chemistry and Pharmacy, Sofia University, 1164 Sofia, Bulgaria
| | - Z Mitrinova
- Department of Chemical and Pharmaceutical Engineering, Faculty of Chemistry and Pharmacy, Sofia University, 1164 Sofia, Bulgaria
| | - M Hristova
- Department of Chemical and Pharmaceutical Engineering, Faculty of Chemistry and Pharmacy, Sofia University, 1164 Sofia, Bulgaria
| | - N Burdzhiev
- Department of Organic Chemistry and Pharmacognosy, Faculty of Chemistry and Pharmacy, Sofia University, 1164 Sofia, Bulgaria
| | - S Tcholakova
- Department of Chemical and Pharmaceutical Engineering, Faculty of Chemistry and Pharmacy, Sofia University, 1164 Sofia, Bulgaria.
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6
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Xu Q, Wang Y, Zheng Y, Zhu Y, Li Z, Liu Y, Ding M. Polymersomes in Drug Delivery─From Experiment to Computational Modeling. Biomacromolecules 2024; 25:2114-2135. [PMID: 38011222 DOI: 10.1021/acs.biomac.3c00903] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
Polymersomes, composed of amphiphilic block copolymers, are self-assembled vesicles that have gained attention as potential drug delivery systems due to their good biocompatibility, stability, and versatility. Various experimental techniques have been employed to characterize the self-assembly behaviors and properties of polymersomes. However, they have limitations in revealing molecular details and underlying mechanisms. Computational modeling techniques have emerged as powerful tools to complement experimental studies and enabled researchers to examine drug delivery mechanisms at molecular resolution. This review aims to provide a comprehensive overview of the state of the art in the field of polymersome-based drug delivery systems, with an emphasis on insights gained from both experimental and computational studies. Specifically, we focus on polymersome morphologies, self-assembly kinetics, fusion and fission, behaviors in flow, as well as drug encapsulation and release mechanisms. Furthermore, we also identify existing challenges and limitations in this rapidly evolving field and suggest possible directions for future research.
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Affiliation(s)
- Qianru Xu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Yiwei Wang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Yi Zheng
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Yuling Zhu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Zifen Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Yang Liu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Mingming Ding
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, P. R. China
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7
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Denk P, Matthews L, Prévost S, Zemb T, Kunz W. A dilute nematic gel produced by intramicellar segregation of two polyoxyethylene alkyl ether carboxylic acids. J Colloid Interface Sci 2024; 659:833-848. [PMID: 38218087 DOI: 10.1016/j.jcis.2024.01.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Revised: 12/28/2023] [Accepted: 01/03/2024] [Indexed: 01/15/2024]
Abstract
MOTIVATION Surfactants like C8E8CH2COOH have such bulky headgroups that they cannot show the common sphere-to-cylinder transition, while surfactants like C18:1E2CH2COOH are mimicking lipids and form only bilayers. Mixing these two types of surfactants allows one to investigate the competition between intramicellar segregation leading to disc-like bicelles and the temperature dependent curvature constraints imposed by the mismatch between heads and tails. EXPERIMENTS We establish phase diagrams as a function of temperature, surfactant mole ratio, and active matter content. We locate the isotropic liquid-isotropic liquid phase separation common to all nonionic surfactant systems, as well as nematic and lamellar phases. The stability and rheology of the nematic phase is investigated. Texture determination by polarizing microscopy allows us to distinguish between the different phases. Finally, SANS and SAXS give intermicellar distances as well as micellar sizes and shapes present for different compositions in the phase diagrams. FINDINGS In a defined mole ratio between the two components, intramicellar segregation wins and a viscoelastic discotic nematic phase is present at low temperature. Partial intramicellar mixing upon heating leads to disc growth and eventually to a pseudo-lamellar phase. Further heating leads to complete random mixing and an isotropic phase, showing the common liquid-liquid miscibility gap. This uncommon phase sequence, bicelles, lamellar phase, micelles, and water-poor packed micelles, is due to temperature induced mixing combined with dehydration of the headgroups. This general molecular mechanism explains also why a metastable water-poor lamellar phase quenched by cooling can be easily and reproducibly transformed into a nematic phase by gentle hand shaking at room temperature, as well as the entrapment of air bubbles of any size without encapsulation by bilayers or polymers.
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Affiliation(s)
- Patrick Denk
- Institute of Physical and Theoretical Chemistry, University of Regensburg, D-93053 Regensburg, Germany
| | - Lauren Matthews
- ESRF - The European Synchrotron, 71 avenue des Martyrs, F-38043 Grenoble, France
| | - Sylvain Prévost
- ESRF - The European Synchrotron, 71 avenue des Martyrs, F-38043 Grenoble, France; Institut Laue-Langevin - The European Neutron Source, 71 avenue des Martyrs, F-38042 Grenoble, France
| | - Thomas Zemb
- Institut de Chimie Séparative de Marcoule, BP 17171, F-30207 Bagnols sur Cèze, France
| | - Werner Kunz
- Institute of Physical and Theoretical Chemistry, University of Regensburg, D-93053 Regensburg, Germany.
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8
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Kuperkar K, Atanase LI, Bahadur A, Crivei IC, Bahadur P. Degradable Polymeric Bio(nano)materials and Their Biomedical Applications: A Comprehensive Overview and Recent Updates. Polymers (Basel) 2024; 16:206. [PMID: 38257005 PMCID: PMC10818796 DOI: 10.3390/polym16020206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 01/03/2024] [Accepted: 01/05/2024] [Indexed: 01/24/2024] Open
Abstract
Degradable polymers (both biomacromolecules and several synthetic polymers) for biomedical applications have been promising very much in the recent past due to their low cost, biocompatibility, flexibility, and minimal side effects. Here, we present an overview with updated information on natural and synthetic degradable polymers where a brief account on different polysaccharides, proteins, and synthetic polymers viz. polyesters/polyamino acids/polyanhydrides/polyphosphazenes/polyurethanes relevant to biomedical applications has been provided. The various approaches for the transformation of these polymers by physical/chemical means viz. cross-linking, as polyblends, nanocomposites/hybrid composites, interpenetrating complexes, interpolymer/polyion complexes, functionalization, polymer conjugates, and block and graft copolymers, are described. The degradation mechanism, drug loading profiles, and toxicological aspects of polymeric nanoparticles formed are also defined. Biomedical applications of these degradable polymer-based biomaterials in and as wound dressing/healing, biosensors, drug delivery systems, tissue engineering, and regenerative medicine, etc., are highlighted. In addition, the use of such nano systems to solve current drug delivery problems is briefly reviewed.
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Affiliation(s)
- Ketan Kuperkar
- Department of Chemistry, Sardar Vallabhbhai National Institute of Technology (SVNIT), Ichchhanath, Piplod, Surat 395007, Gujarat, India;
| | - Leonard Ionut Atanase
- Faculty of Medical Dentistry, “Apollonia” University of Iasi, 700511 Iasi, Romania
- Academy of Romanian Scientists, 050045 Bucharest, Romania
| | - Anita Bahadur
- Department of Zoology, Sir PT Sarvajanik College of Science, Surat 395001, Gujarat, India;
| | - Ioana Cristina Crivei
- Department of Public Health, Faculty of Veterinary Medicine, “Ion Ionescu de la Brad” University of Life Sciences, 700449 Iasi, Romania;
| | - Pratap Bahadur
- Department of Chemistry, Veer Narmad South Gujarat University (VNSGU), Udhana-Magdalla Road, Surat 395007, Gujarat, India;
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9
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Kang L, Wang Q, Zhang L, Zou H, Gao J, Niu K, Jiang N. Recent Experimental Advances in Characterizing the Self-Assembly and Phase Behavior of Polypeptoids. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16114175. [PMID: 37297308 DOI: 10.3390/ma16114175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 05/29/2023] [Accepted: 05/31/2023] [Indexed: 06/12/2023]
Abstract
Polypeptoids are a family of synthetic peptidomimetic polymers featuring N-substituted polyglycine backbones with large chemical and structural diversity. Their synthetic accessibility, tunable property/functionality, and biological relevance make polypeptoids a promising platform for molecular biomimicry and various biotechnological applications. To gain insight into the relationship between the chemical structure, self-assembly behavior, and physicochemical properties of polypeptoids, many efforts have been made using thermal analysis, microscopy, scattering, and spectroscopic techniques. In this review, we summarize recent experimental investigations that have focused on the hierarchical self-assembly and phase behavior of polypeptoids in bulk, thin film, and solution states, highlighting the use of advanced characterization tools such as in situ microscopy and scattering techniques. These methods enable researchers to unravel multiscale structural features and assembly processes of polypeptoids over a wide range of length and time scales, thereby providing new insights into the structure-property relationship of these protein-mimetic materials.
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Affiliation(s)
- Liying Kang
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Qi Wang
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Lei Zhang
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Hang Zou
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Jun Gao
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Kangmin Niu
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Naisheng Jiang
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
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10
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Lipowsky R, Ghosh R, Satarifard V, Sreekumari A, Zamaletdinov M, Różycki B, Miettinen M, Grafmüller A. Leaflet Tensions Control the Spatio-Temporal Remodeling of Lipid Bilayers and Nanovesicles. Biomolecules 2023; 13:926. [PMID: 37371505 PMCID: PMC10296112 DOI: 10.3390/biom13060926] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Revised: 05/24/2023] [Accepted: 05/26/2023] [Indexed: 06/29/2023] Open
Abstract
Biological and biomimetic membranes are based on lipid bilayers, which consist of two monolayers or leaflets. To avoid bilayer edges, which form when the hydrophobic core of such a bilayer is exposed to the surrounding aqueous solution, a single bilayer closes up into a unilamellar vesicle, thereby separating an interior from an exterior aqueous compartment. Synthetic nanovesicles with a size below 100 nanometers, traditionally called small unilamellar vesicles, have emerged as potent platforms for the delivery of drugs and vaccines. Cellular nanovesicles of a similar size are released from almost every type of living cell. The nanovesicle morphology has been studied by electron microscopy methods but these methods are limited to a single snapshot of each vesicle. Here, we review recent results of molecular dynamics simulations, by which one can monitor and elucidate the spatio-temporal remodeling of individual bilayers and nanovesicles. We emphasize the new concept of leaflet tensions, which control the bilayers' stability and instability, the transition rates of lipid flip-flops between the two leaflets, the shape transformations of nanovesicles, the engulfment and endocytosis of condensate droplets and rigid nanoparticles, as well as nanovesicle adhesion and fusion. To actually compute the leaflet tensions, one has to determine the bilayer's midsurface, which represents the average position of the interface between the two leaflets. Two particularly useful methods to determine this midsurface are based on the density profile of the hydrophobic lipid chains and on the molecular volumes.
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Affiliation(s)
- Reinhard Lipowsky
- Max Planck Institute of Colloids and Interfaces, Science Park Golm, 14424 Potsdam, Germany
| | - Rikhia Ghosh
- Max Planck Institute of Colloids and Interfaces, Science Park Golm, 14424 Potsdam, Germany
- Icahn School of Medicine Mount Sinai, New York, NY 10029, USA
| | - Vahid Satarifard
- Max Planck Institute of Colloids and Interfaces, Science Park Golm, 14424 Potsdam, Germany
- Yale Institute for Network Science, Yale University, New Haven, CT 06520, USA
| | - Aparna Sreekumari
- Max Planck Institute of Colloids and Interfaces, Science Park Golm, 14424 Potsdam, Germany
- Department of Physics, Indian Institute of Technology Palakkad, Palakkad 678 623, India
| | - Miftakh Zamaletdinov
- Max Planck Institute of Colloids and Interfaces, Science Park Golm, 14424 Potsdam, Germany
| | - Bartosz Różycki
- Max Planck Institute of Colloids and Interfaces, Science Park Golm, 14424 Potsdam, Germany
- Institute of Physics, Polish Academy of Sciences, Aleja Lotnikow 32/46, 02-668 Warsaw, Poland
| | - Markus Miettinen
- Max Planck Institute of Colloids and Interfaces, Science Park Golm, 14424 Potsdam, Germany
- Department of Chemistry, University of Bergen, 5020 Bergen, Norway
| | - Andrea Grafmüller
- Max Planck Institute of Colloids and Interfaces, Science Park Golm, 14424 Potsdam, Germany
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11
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Bezbaruah R, Chavda VP, Nongrang L, Alom S, Deka K, Kalita T, Ali F, Bhattacharjee B, Vora L. Nanoparticle-Based Delivery Systems for Vaccines. Vaccines (Basel) 2022; 10:1946. [PMID: 36423041 PMCID: PMC9694785 DOI: 10.3390/vaccines10111946] [Citation(s) in RCA: 38] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Revised: 11/08/2022] [Accepted: 11/09/2022] [Indexed: 11/19/2022] Open
Abstract
Vaccination is still the most cost-effective way to combat infectious illnesses. Conventional vaccinations may have low immunogenicity and, in most situations, only provide partial protection. A new class of nanoparticle-based vaccinations has shown considerable promise in addressing the majority of the shortcomings of traditional and subunit vaccines. This is due to recent breakthroughs in chemical and biological engineering, which allow for the exact regulation of nanoparticle size, shape, functionality, and surface characteristics, resulting in improved antigen presentation and robust immunogenicity. A blend of physicochemical, immunological, and toxicological experiments can be used to accurately characterize nanovaccines. This narrative review will provide an overview of the current scenario of the nanovaccine.
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Affiliation(s)
- Rajashri Bezbaruah
- Department of Pharmaceutical Sciences, Faculty of Science and Engineering, Dibrugarh University, Dibrugarh 786004, Assam, India
| | - Vivek P. Chavda
- Department of Pharmaceutics and Pharmaceutical Technology, L. M. College of Pharmacy, Ahmedabad 380008, Gujarat, India
| | - Lawandashisha Nongrang
- Department of Pharmaceutical Sciences, Faculty of Science and Engineering, Dibrugarh University, Dibrugarh 786004, Assam, India
| | - Shahnaz Alom
- Department of Pharmaceutical Sciences, Faculty of Science and Engineering, Dibrugarh University, Dibrugarh 786004, Assam, India
- Department of Pharmacology, Girijananda Chowdhury Institute of Pharmaceutical Science-Tezpur, Sonitpur 784501, Assam, India
| | - Kangkan Deka
- Department of Pharmacognosy, NETES Institute of Pharmaceutical Science, Mirza, Guwahati 781125, Assam, India
| | - Tutumoni Kalita
- Department of Pharmaceutical Chemistry, Girijananda Chowdhury Institute of Pharmaceutical Sciences, Azara, Guwahati 781017, Assam, India
| | - Farak Ali
- Department of Pharmaceutical Sciences, Faculty of Science and Engineering, Dibrugarh University, Dibrugarh 786004, Assam, India
- Department of Pharmaceutical Chemistry, Girijananda Chowdhury Institute of Pharmaceutical Science-Tezpur, Sonitpur 784501, Assam, India
| | - Bedanta Bhattacharjee
- Department of Pharmacology, Girijananda Chowdhury Institute of Pharmaceutical Science-Tezpur, Sonitpur 784501, Assam, India
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12
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The influence of different bioadhesive polymers on physicochemical properties of thermoresponsive emulgels containing Amazonian andiroba oil. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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13
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Köber M, Illa-Tuset S, Ferrer-Tasies L, Moreno-Calvo E, Tatkiewicz WI, Grimaldi N, Piña D, Pérez Pérez A, Lloveras V, Vidal-Gancedo J, Bulone D, Ratera I, Skov Pedersenc J, Danino D, Veciana J, Faraudo J, Ventosa N. Stable nanovesicles formed by intrinsically planar bilayers. J Colloid Interface Sci 2022; 631:202-211. [DOI: 10.1016/j.jcis.2022.10.104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 10/16/2022] [Accepted: 10/20/2022] [Indexed: 11/06/2022]
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14
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Andrusenko I, Gemmi M. 3D electron diffraction for structure determination of small-molecule nanocrystals: A possible breakthrough for the pharmaceutical industry. WILEY INTERDISCIPLINARY REVIEWS. NANOMEDICINE AND NANOBIOTECHNOLOGY 2022; 14:e1810. [PMID: 35595285 PMCID: PMC9539612 DOI: 10.1002/wnan.1810] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 04/29/2022] [Accepted: 05/02/2022] [Indexed: 11/10/2022]
Abstract
Nanomedicine is among the most fascinating areas of research. Most of the newly discovered pharmaceutical polymorphs, as well as many new synthesized or isolated natural products, appear only in form of nanocrystals. The development of techniques that allow investigating the atomic structure of nanocrystalline materials is therefore one of the most important frontiers of crystallography. Some unique features of electrons, like their non-neutral charge and their strong interaction with matter, make this radiation suitable for imaging and detecting individual atoms, molecules, or nanoscale objects down to sub-angstrom resolution. In the recent years the development of three-dimensional (3D) electron diffraction (3D ED) has shown that electron diffraction can be successfully used to solve the crystal structure of nanocrystals and most of its limiting factors like dynamical scattering or limited completeness can be easily overcome. This article is a review of the state of the art of this method with a specific focus on how it can be applied to beam sensitive samples like small-molecule organic nanocrystals. This article is categorized under: Therapeutic Approaches and Drug Discovery > Emerging Technologies.
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Affiliation(s)
- Iryna Andrusenko
- Center for Materials Interfaces, Electron CrystallographyIstituto Italiano di TecnologiaPontedera
| | - Mauro Gemmi
- Center for Materials Interfaces, Electron CrystallographyIstituto Italiano di TecnologiaPontedera
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15
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Thermo-responsive lipophilic NIPAM-based block copolymers as stabilizers for lipid-based cubic nanoparticles. Colloids Surf B Biointerfaces 2022; 220:112884. [DOI: 10.1016/j.colsurfb.2022.112884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 09/14/2022] [Accepted: 09/25/2022] [Indexed: 11/21/2022]
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16
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Danino D, Zembc T. On the shape and connections of micelles: EM imaging inspiring thermodynamic modelling. Curr Opin Colloid Interface Sci 2022. [DOI: 10.1016/j.cocis.2022.101607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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17
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Danov KD, Marinova KG, Radulova GM, Georgiev MT. Analytical modeling of micelle growth. 5. Molecular thermodynamics of micelles from zwitterionic surfactants. J Colloid Interface Sci 2022; 627:469-482. [PMID: 35870400 DOI: 10.1016/j.jcis.2022.07.087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 07/12/2022] [Accepted: 07/13/2022] [Indexed: 11/19/2022]
Abstract
HYPOTHESIS The critical micelle concentration, aggregation number, shape and length of spherocylindrical micelles in solutions of zwitterionic surfactants can be predicted by knowing the molecular parameters and surfactant concentrations. This can be achieved by upgrading the quantitative molecular thermodynamic model with expressions for the electrostatic interaction energy between the zwitterionic dipoles and micellar hydrophobic cores of spherical and cylindrical shapes. THEORY The correct prediction of the mean micellar aggregation numbers requires precise calculations of the free energy per molecule in the micelles. New analytical expressions for the dipole electrostatic interaction energy are derived based on the exact solutions of the electrostatic problem for a single charge close to a boundary of spherical and cylindrical dielectric media. The obtained general theory is valid for arbitrary ratios between dielectric constants, radii of spheres and cylinders, positions, and orientations of dipoles. FINDINGS The detailed numerical results show quantitatively the effects of the micelle curvature and dielectric properties of the continuum media on the decrease of the dipole electrostatic interaction energy. Excellent agreement was achieved between the theoretical predictions and experimental data for the critical micelle concentration, size and aggregation number of zwitterionic surfactant micelles. This study can be extended to mixed micelles of zwitterionic and ionic surfactants in the presence of salt to interpret and predict the synergistic effect on the rheology of solutions.
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Affiliation(s)
- Krassimir D Danov
- Department of Chemical & Pharmaceutical Engineering, Faculty of Chemistry & Pharmacy, Sofia University, 1164 Sofia, Bulgaria.
| | - Krastanka G Marinova
- Department of Chemical & Pharmaceutical Engineering, Faculty of Chemistry & Pharmacy, Sofia University, 1164 Sofia, Bulgaria
| | - Gergana M Radulova
- Department of Chemical & Pharmaceutical Engineering, Faculty of Chemistry & Pharmacy, Sofia University, 1164 Sofia, Bulgaria
| | - Mihail T Georgiev
- Department of Chemical & Pharmaceutical Engineering, Faculty of Chemistry & Pharmacy, Sofia University, 1164 Sofia, Bulgaria
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18
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Subba N, Das N, Sen P. Tracking Wormlike Micelle Formation in Solution: Unique Insight through Fluorescence Correlation Spectroscopic Study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:2486-2494. [PMID: 35164504 DOI: 10.1021/acs.langmuir.1c02936] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Although worm-like micelles were invented 35 years ago, its formation pathway remains unclear. Inspired by the fact that a single molecular level experiment could provide meaningful and additional information, especially in a heterogeneous subpopulation, herein, we present a single molecular level study on the formation of wormlike micelles by cetyltrimethylammonium bromide (CTAB) and sodium salicylate (NaSal) in water. Our results indicated a coexistence of normal spherical micelles along with a big wormlike micelle in its formation path. More interestingly, we have two unique insights into the formation mechanism, which are inaccessible in ensemble averaged experiments: (i) at extremely low concentrations of the surfactant, [CTAB]/[NaSal] ∼ 0.06, the wormlike micelle attains the highest size; and (ii) the relative concentration of wormlike micelles is highest when [CTAB]/[NaSal] ∼ 2.
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Affiliation(s)
- Navin Subba
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur - 208016, UP India
| | - Nilimesh Das
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur - 208016, UP India
| | - Pratik Sen
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur - 208016, UP India
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19
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Tuning the shell structure of peptide nanotubes with sodium tartrate: From monolayer to bilayer. J Colloid Interface Sci 2022; 608:1685-1695. [PMID: 34742083 DOI: 10.1016/j.jcis.2021.10.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 09/29/2021] [Accepted: 10/04/2021] [Indexed: 01/21/2023]
Abstract
Though the function of peptide based nanotubes are well correlated with its shape and size, controlling the dimensions of nanotubes still remains a great challenge in the field of peptide self-assembly. Here, we demonstrated that the shell structure of nanotubes formed by a bola peptide Ac-KI3VK-NH2 (KI3VK, in which K, I, and V are abbreviations of lysine, isoleucine, and valine) can be regulated by mixing it with the salt sodium tartrate (STA). The ratio of KI3VK and STA had a great impact on shell structure of the nanotubes. Bilayer nanotubes can be constructed when the molar ratio of KI3VK and STA was less than 1:2. Both the two hydroxyls and the negative charges carried by STA were proved to play important roles in the bilayer nanotubes formation. Observations of different intermediates provided obvious evidence for the varied pathway of the bilayer nanotubes formation. Based on these experimental results, the possible mechanism for bilayer nanotubes formation was proposed. Such a study provides a simple and effective way for regulating the shell structure of the nanotubes and may expand their applications in different fields.
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20
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Pinto A, Sonet J, Gomila RM, Frontera A, Lima JC, Rodríguez L. Supramolecular gold( i) vesicles: an in-depth study of their aggregation process. Inorg Chem Front 2022. [DOI: 10.1039/d2qi01267g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis and aggregation behaviour of two gold(i) complexes containing a pyridyl ligand with a polyethyleneglycol pendant arm at one position and a chromophore (aniline or coumarin) at the second coordination position is herein reported.
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Affiliation(s)
- Andrea Pinto
- Departament de Química Inorgànica i Orgànica, Secció de Química Inorgànica, Universitat de Barcelona, Martí i Franquès 1-11, E-08028 Barcelona, Spain
- Institut de Nanociència i Nanotecnologia (IN2UB), Universitat de Barcelona, 08028 Barcelona, Spain
| | - Jaume Sonet
- Departament de Química Inorgànica i Orgànica, Secció de Química Inorgànica, Universitat de Barcelona, Martí i Franquès 1-11, E-08028 Barcelona, Spain
| | - Rosa M. Gomila
- Departament de Química, Universitat de les Illes Balears, 07071 Palma de Mallorca, Spain
| | - Antonio Frontera
- Departament de Química, Universitat de les Illes Balears, 07071 Palma de Mallorca, Spain
| | - João Carlos Lima
- LAQV-REQUIMTE, Departamento de Química, CQFB, Universidade Nova de Lisboa, Monte de Caparica, Portugal
| | - Laura Rodríguez
- Departament de Química Inorgànica i Orgànica, Secció de Química Inorgànica, Universitat de Barcelona, Martí i Franquès 1-11, E-08028 Barcelona, Spain
- Institut de Nanociència i Nanotecnologia (IN2UB), Universitat de Barcelona, 08028 Barcelona, Spain
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21
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Koroleva M, Portnaya I, Mischenko E, Abutbul-Ionita I, Kolik-Shmuel L, Danino D. Solid lipid nanoparticles and nanoemulsions with solid shell: Physical and thermal stability. J Colloid Interface Sci 2021; 610:61-69. [PMID: 34922082 DOI: 10.1016/j.jcis.2021.12.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 11/11/2021] [Accepted: 12/02/2021] [Indexed: 12/20/2022]
Abstract
HYPOTHESIS Nanoemulsions (NE) and solid lipid nanoparticles (SLN) used for drug delivery should have a solid shell to be stable during long shelf life and become liquid at human body temperature. The core components of lipid nanoparticles can be partially incorporated into the shell and affect the physical and thermal stability. EXPERIMENTS We prepared NE and SLN by the phase inversion temperature (PIT) method. Solidification of the surfactants Tween60 and Span 60 on the surface of NE droplets with paraffin oil resulted in the formation of the solid shell. SLN contained stearic acid in the core and the same surfactants in the solid shell. The size, structure and stability of the NE and SLN were studied by DLS and cryo-TEM. Their crystallization and melting were analyzed using DSC. FINDINGS The lipid nanoparticles were resistant to aggregation and sedimentation and hold up to at least two cycles of heating to 50-60 °C and subsequent cooling to 5 °C, even though the upper temperatures were higher than the melting point of the surfactant shell. The expected liquid core/solid shell morphology of NE was confirmed. SLN were composed of a semi-liquid core of supercooled stearic acid melt and coated with a solid surfactant shell, so they can be treated as NE. Stearic acid molecules penetrated the shell, leading to an increase in its melting point.
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Affiliation(s)
- M Koroleva
- Department of Nanomaterials and Nanotechnology, Mendeleev University of Chemical Technology, Moscow 125047, Russia.
| | - I Portnaya
- CryoEM Laboratory of Soft Matter, Faculty of Biotechnology and Food Engineering, Technion-Israel Institute of Technology, Haifa 3200003, Israel
| | - E Mischenko
- Department of Nanomaterials and Nanotechnology, Mendeleev University of Chemical Technology, Moscow 125047, Russia
| | - I Abutbul-Ionita
- CryoEM Laboratory of Soft Matter, Faculty of Biotechnology and Food Engineering, Technion-Israel Institute of Technology, Haifa 3200003, Israel
| | - L Kolik-Shmuel
- CryoEM Laboratory of Soft Matter, Faculty of Biotechnology and Food Engineering, Technion-Israel Institute of Technology, Haifa 3200003, Israel
| | - D Danino
- CryoEM Laboratory of Soft Matter, Faculty of Biotechnology and Food Engineering, Technion-Israel Institute of Technology, Haifa 3200003, Israel.
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22
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Lipowsky R. Remodeling of Membrane Shape and Topology by Curvature Elasticity and Membrane Tension. Adv Biol (Weinh) 2021; 6:e2101020. [PMID: 34859961 DOI: 10.1002/adbi.202101020] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 09/04/2021] [Indexed: 01/08/2023]
Abstract
Cellular membranes exhibit a fascinating variety of different morphologies, which are continuously remodeled by transformations of membrane shape and topology. This remodeling is essential for important biological processes (cell division, intracellular vesicle trafficking, endocytosis) and can be elucidated in a systematic and quantitative manner using synthetic membrane systems. Here, recent insights obtained from such synthetic systems are reviewed, integrating experimental observations and molecular dynamics simulations with the theory of membrane elasticity. The study starts from the polymorphism of biomembranes as observed for giant vesicles by optical microscopy and small nanovesicles in simulations. This polymorphism reflects the unusual elasticity of fluid membranes and includes the formation of membrane necks or fluid 'worm holes'. The proliferation of membrane necks generates stable multi-spherical shapes, which can form tubules and tubular junctions. Membrane necks are also essential for the remodeling of membrane topology via membrane fission and fusion. Neck fission can be induced by fine-tuning of membrane curvature, which leads to the controlled division of giant vesicles, and by adhesion-induced membrane tension as observed for small nanovesicles. Challenges for future research include the interplay of curvature elasticity and membrane tension during membrane fusion and the localization of fission and fusion processes within intramembrane domains.
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Affiliation(s)
- Reinhard Lipowsky
- Theory & Biosystems, Max Planck Institute of Colloids and Interfaces, Science Park Golm, Potsdam, Germany
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23
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Lattanzi V, André I, Gasser U, Dubackic M, Olsson U, Linse S. Amyloid β 42 fibril structure based on small-angle scattering. Proc Natl Acad Sci U S A 2021; 118:e2112783118. [PMID: 34815346 PMCID: PMC8640717 DOI: 10.1073/pnas.2112783118] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/19/2021] [Indexed: 01/30/2023] Open
Abstract
Amyloid fibrils are associated with a number of neurodegenerative diseases, including fibrils of amyloid β42 peptide (Aβ42) in Alzheimer's disease. These fibrils are a source of toxicity to neuronal cells through surface-catalyzed generation of toxic oligomers. Detailed knowledge of the fibril structure may thus facilitate therapeutic development. We use small-angle scattering to provide information on the fibril cross-section dimension and shape for Aβ42 fibrils prepared in aqueous phosphate buffer at pH = 7.4 and pH 8.0 under quiescent conditions at 37 °C from pure recombinant Aβ42 peptide. Fitting the data using a continuum model reveals an elliptical cross-section and a peptide mass-per-unit length compatible with two filaments of two monomers, four monomers per plane. To provide a more detailed atomistic model, the data were fitted using as a starting state a high-resolution structure of the two-monomer arrangement in filaments from solid-state NMR (Protein Data Bank ID 5kk3). First, a twofold symmetric model including residues 11 to 42 of two monomers in the filament was optimized in terms of twist angle and local packing using Rosetta. A two-filament model was then built and optimized through fitting to the scattering data allowing the two N-termini in each filament to take different conformations, with the same conformation in each of the two filaments. This provides an atomistic model of the fibril with twofold rotation symmetry around the fibril axis. Intriguingly, no polydispersity as regards the number of filaments was observed in our system over separate samples, suggesting that the two-filament arrangement represents a free energy minimum for the Aβ42 fibril.
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Affiliation(s)
- Veronica Lattanzi
- Biochemistry and Structural Biology, Lund University, SE-22100 Lund, Sweden;
- Division of Physical Chemistry, Lund University, SE-22100 Lund, Sweden
| | - Ingemar André
- Biochemistry and Structural Biology, Lund University, SE-22100 Lund, Sweden
| | - Urs Gasser
- Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
| | - Marija Dubackic
- Biochemistry and Structural Biology, Lund University, SE-22100 Lund, Sweden
- Division of Physical Chemistry, Lund University, SE-22100 Lund, Sweden
| | - Ulf Olsson
- Division of Physical Chemistry, Lund University, SE-22100 Lund, Sweden
| | - Sara Linse
- Biochemistry and Structural Biology, Lund University, SE-22100 Lund, Sweden
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24
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Pitz ME, Nukovic AM, Elpers MA, Alexander-Bryant AA. Factors Affecting Secondary and Supramolecular Structures of Self-Assembling Peptide Nanocarriers. Macromol Biosci 2021; 22:e2100347. [PMID: 34800001 DOI: 10.1002/mabi.202100347] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 10/19/2021] [Indexed: 01/12/2023]
Abstract
Self-assembling peptides are a popular vector for therapeutic cargo delivery due to their versatility, tunability, and biocompatibility. Accurately predicting secondary and supramolecular structures of self-assembling peptides is essential for de novo peptide design. However, computational modeling of such assemblies is not yet able to accurately predict structure formation for many peptide sequences. This review identifies patterns in literature between secondary and supramolecular structures, primary sequences, and applications to provide a guide for informed peptide design. An overview of peptide structures, their applications as nanocarriers, and analytical methods for characterizing secondary and supramolecular structure is examined. A top-down approach is then used to identify trends between peptide sequence and assembly structure from the current literature, including an analysis of the drivers at work, such as local and nonlocal sequence effects and solution conditions.
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Affiliation(s)
- Megan E Pitz
- Department of Bioengineering, 301 Rhodes Research Center, Clemson University, Clemson, SC, 29634-0905, USA
| | - Alexandra M Nukovic
- Department of Bioengineering, 301 Rhodes Research Center, Clemson University, Clemson, SC, 29634-0905, USA
| | - Margaret A Elpers
- Department of Bioengineering, 301 Rhodes Research Center, Clemson University, Clemson, SC, 29634-0905, USA
| | - Angela A Alexander-Bryant
- Department of Bioengineering, 301 Rhodes Research Center, Clemson University, Clemson, SC, 29634-0905, USA
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25
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26
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Yu J, Jeon YR, Kim YH, Jung EB, Choi SJ. Characterization and Determination of Nanoparticles in Commercial Processed Foods. Foods 2021; 10:2020. [PMID: 34574130 PMCID: PMC8465140 DOI: 10.3390/foods10092020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 08/25/2021] [Accepted: 08/25/2021] [Indexed: 12/12/2022] Open
Abstract
A wide variety of foods manufactured by nanotechnology are commercially available on the market and labeled as nanoproducts. However, it is challenging to determine the presence of nanoparticles (NPs) in complex food matrices and processed foods. In this study, top-down-approach-produced (TD)-NP products and nanobubble waters (NBWs) were chosen as representative powdered and liquid nanoproducts, respectively. The characterization and determination of NPs in TD-NP products and NBWs were carried out by measuring constituent particle sizes, hydrodynamic diameters, zeta potentials, and surface chemistry. The results show that most NBWs had different characteristics compared with those of conventional sparkling waters, but nanobubbles were unstable during storage. On the other hand, powdered TD-NP products were found to be highly aggregated, and the constituent particle sizes less than 100 nm were remarkably observed after dispersion compared with counterpart conventional bulk-sized products by scanning electron microscopy at low acceleration voltage and cryogenic transmission electron microscopy. The differences in chemical composition and chemical state between TD-NPs and their counterpart conventional bulk products were also found by X-ray photoelectron spectroscopy. These findings will provide basic information about the presence of NPs in nano-labeled products and be useful to understand and predict the potential toxicity of NPs applied to the food industry.
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Affiliation(s)
| | | | | | | | - Soo-Jin Choi
- Division of Applied Food System, Major of Food Science & Technology, Seoul Women’s University, Seoul 01797, Korea; (J.Y.); (Y.-R.J.); (Y.-H.K.); (E.-B.J.)
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27
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Jacoby G, Segal Asher M, Ehm T, Abutbul Ionita I, Shinar H, Azoulay-Ginsburg S, Zemach I, Koren G, Danino D, Kozlov MM, Amir RJ, Beck R. Order from Disorder with Intrinsically Disordered Peptide Amphiphiles. J Am Chem Soc 2021; 143:11879-11888. [PMID: 34310121 PMCID: PMC8397319 DOI: 10.1021/jacs.1c06133] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Indexed: 01/02/2023]
Abstract
Amphiphilic molecules and their self-assembled structures have long been the target of extensive research due to their potential applications in fields ranging from materials design to biomedical and cosmetic applications. Increasing demands for functional complexity have been met with challenges in biochemical engineering, driving researchers to innovate in the design of new amphiphiles. An emerging class of molecules, namely, peptide amphiphiles, combines key advantages and circumvents some of the disadvantages of conventional phospholipids and block copolymers. Herein, we present new peptide amphiphiles composed of an intrinsically disordered peptide conjugated to two variants of hydrophobic dendritic domains. These molecules, termed intrinsically disordered peptide amphiphiles (IDPA), exhibit a sharp pH-induced micellar phase-transition from low-dispersity spheres to extremely elongated worm-like micelles. We present an experimental characterization of the transition and propose a theoretical model to describe the pH-response. We also present the potential of the shape transition to serve as a mechanism for the design of a cargo hold-and-release application. Such amphiphilic systems demonstrate the power of tailoring the interactions between disordered peptides for various stimuli-responsive biomedical applications.
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Affiliation(s)
- Guy Jacoby
- Raymond
& Beverly Sackler School of Physics & Astronomy, Tel Aviv University, Tel Aviv 6997801, Israel
- The
Center for Physics & Chemistry of Living Systems, Tel Aviv University, Tel Aviv 6997801, Israel
- The
Center for NanoTechnology & NanoScience, Tel Aviv Univeristy, Tel Aviv 6997801, Israel
| | - Merav Segal Asher
- The
Center for Physics & Chemistry of Living Systems, Tel Aviv University, Tel Aviv 6997801, Israel
- The
Center for NanoTechnology & NanoScience, Tel Aviv Univeristy, Tel Aviv 6997801, Israel
- Raymond
& Beverly Sackler School of Chemistry, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Tamara Ehm
- Raymond
& Beverly Sackler School of Physics & Astronomy, Tel Aviv University, Tel Aviv 6997801, Israel
- The
Center for Physics & Chemistry of Living Systems, Tel Aviv University, Tel Aviv 6997801, Israel
- The
Center for NanoTechnology & NanoScience, Tel Aviv Univeristy, Tel Aviv 6997801, Israel
- Faculty
of Physics and Center for NanoScience, Ludwig-Maximilians-Universität, München D-80539, Germany
| | - Inbal Abutbul Ionita
- CryoEM
Laboratory of Soft Matter, Faculty of Biotechnology and Food Engineering, Technion-Israel Institute of Technology, Haifa 3200003, Israel
| | - Hila Shinar
- Raymond
& Beverly Sackler School of Physics & Astronomy, Tel Aviv University, Tel Aviv 6997801, Israel
- The
Center for Physics & Chemistry of Living Systems, Tel Aviv University, Tel Aviv 6997801, Israel
- The
Center for NanoTechnology & NanoScience, Tel Aviv Univeristy, Tel Aviv 6997801, Israel
| | - Salome Azoulay-Ginsburg
- Raymond
& Beverly Sackler School of Chemistry, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Ido Zemach
- Raymond
& Beverly Sackler School of Physics & Astronomy, Tel Aviv University, Tel Aviv 6997801, Israel
- The
Center for Physics & Chemistry of Living Systems, Tel Aviv University, Tel Aviv 6997801, Israel
- The
Center for NanoTechnology & NanoScience, Tel Aviv Univeristy, Tel Aviv 6997801, Israel
| | - Gil Koren
- Raymond
& Beverly Sackler School of Physics & Astronomy, Tel Aviv University, Tel Aviv 6997801, Israel
- The
Center for Physics & Chemistry of Living Systems, Tel Aviv University, Tel Aviv 6997801, Israel
- The
Center for NanoTechnology & NanoScience, Tel Aviv Univeristy, Tel Aviv 6997801, Israel
| | - Dganit Danino
- CryoEM
Laboratory of Soft Matter, Faculty of Biotechnology and Food Engineering, Technion-Israel Institute of Technology, Haifa 3200003, Israel
- Guangdong-Technion
Israel Institute of Technology, Shantou, Guangdong Province 515063, China
| | - Michael M. Kozlov
- The
Center for Physics & Chemistry of Living Systems, Tel Aviv University, Tel Aviv 6997801, Israel
- Sackler School
of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Roey J. Amir
- The
Center for Physics & Chemistry of Living Systems, Tel Aviv University, Tel Aviv 6997801, Israel
- The
Center for NanoTechnology & NanoScience, Tel Aviv Univeristy, Tel Aviv 6997801, Israel
- Raymond
& Beverly Sackler School of Chemistry, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Roy Beck
- Raymond
& Beverly Sackler School of Physics & Astronomy, Tel Aviv University, Tel Aviv 6997801, Israel
- The
Center for Physics & Chemistry of Living Systems, Tel Aviv University, Tel Aviv 6997801, Israel
- The
Center for NanoTechnology & NanoScience, Tel Aviv Univeristy, Tel Aviv 6997801, Israel
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Merlo-Mas J, Tomsen-Melero J, Corchero JL, González-Mira E, Font A, Pedersen JN, García-Aranda N, Cristóbal-Lecina E, Alcaina-Hernando M, Mendoza R, Garcia-Fruitós E, Lizarraga T, Resch S, Schimpel C, Falk A, Pulido D, Royo M, Schwartz S, Abasolo I, Pedersen JS, Danino D, Soldevila A, Veciana J, Sala S, Ventosa N, Córdoba A. Application of Quality by Design to the robust preparation of a liposomal GLA formulation by DELOS-susp method. J Supercrit Fluids 2021; 173:105204. [PMID: 34219919 PMCID: PMC8085735 DOI: 10.1016/j.supflu.2021.105204] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Robust preparation of liposomal formulation by DELOS-susp method. Implementation of Quality by Design methodology to liposomes preparation. Influence of critical parameters on quality was studied through DoE analysis. Design Space was obtained for GLA-loaded liposomes formulation.
Fabry disease is a lysosomal storage disease arising from a deficiency of the enzyme α-galactosidase A (GLA). The enzyme deficiency results in an accumulation of glycolipids, which over time, leads to cardiovascular, cerebrovascular, and renal disease, ultimately leading to death in the fourth or fifth decade of life. Currently, lysosomal storage disorders are treated by enzyme replacement therapy (ERT) through the direct administration of the missing enzyme to the patients. In view of their advantages as drug delivery systems, liposomes are increasingly being researched and utilized in the pharmaceutical, food and cosmetic industries, but one of the main barriers to market is their scalability. Depressurization of an Expanded Liquid Organic Solution into aqueous solution (DELOS-susp) is a compressed fluid-based method that allows the reproducible and scalable production of nanovesicular systems with remarkable physicochemical characteristics, in terms of homogeneity, morphology, and particle size. The objective of this work was to optimize and reach a suitable formulation for in vivo preclinical studies by implementing a Quality by Design (QbD) approach, a methodology recommended by the FDA and the EMA to develop robust drug manufacturing and control methods, to the preparation of α-galactosidase-loaded nanoliposomes (nanoGLA) for the treatment of Fabry disease. Through a risk analysis and a Design of Experiments (DoE), we obtained the Design Space in which GLA concentration and lipid concentration were found as critical parameters for achieving a stable nanoformulation. This Design Space allowed the optimization of the process to produce a nanoformulation suitable for in vivo preclinical testing.
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Key Words
- BCA, Bicinchoninic acid assay
- CMA, Critical Material Attributes
- CO2, Carbon dioxide
- CPP, Critical Process Parameters
- CQA, Critical Quality Attribute
- Chol, Cholesterol
- Chol-PEG400-RGD, Cholesterol pegylated with arginyl–glycyl–aspartic (RGD) acid peptide
- CoA, Certificate of Analysis
- Cryo-TEM, Cryogenic Transmission Electron Microscopy
- DELOS
- DELOS-susp, Depressurization of an Expanded Liquid Organic Solution into aqueous solution
- DLS, Dynamic Light Scattering
- DMSO, Dimethyl sulfoxide
- DPPC, 1,2-Dipalmitoyl-sn-glycero-3-phosphocholine
- DoE, Design of Experiments
- EA, Enzymatic Activity
- EE, Entrapment Efficiency
- EHS, Environment, Health and Safety
- EMA, European Medicines Agency
- ERT, Enzyme Replacement Therapy
- EtOH, Ethanol
- FDA, Food and Drug Administration
- Fabry disease
- GLA, α-galactosidase A enzyme
- H2O, Water
- HPLC, High Performance Liquid Chromatography
- ICH, Council for Harmonisation of Technical Requirements for Pharmaceuticals for Human Use
- LSD, Lysosomal storage disorders
- MKC, Myristalkonium chloride
- N2, Nitrogen
- NTA, Nanoparticle Tracking Analysis
- PEG, Polyethylene Glycol
- PIC, Pressure Indicator Controller
- PLS, Partial Least Squares
- PdI, Polydispersity Index
- Protein-loaded liposomes
- Pw, Working pressure
- QbD, Quality by Design
- Quality by Design
- RGD, Arginine-Glycine-Aspartic acid
- S-MLS, Static Multiple Light Scattering
- SAXS, Small-Angle X-ray Scattering
- SDS-PAGE, Sodium Dodecyl Sulfate Polyacrylamide Gel Electrophoresis
- SbD, Safe by Design
- Scale-up
- TFF, Tangential Flow Filtration
- TGX, Trys-Glycine eXtended
- TIC, Temperature Indicator Controller
- TSI, Turbiscan Stability Index
- Tw, Working temperature
- USP, United States Pharmacopeia
- XCO2, Carbon dioxide molar fraction
- fsingle, Ratio of monolayered liposomes
- nanoGLA, GLA-loaded nanoliposomes
- α-galactosidase
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Affiliation(s)
- Josep Merlo-Mas
- Nanomol Technologies S.L., 08193 Cerdanyola del Vallès, Spain
| | - Judit Tomsen-Melero
- Nanomol Technologies S.L., 08193 Cerdanyola del Vallès, Spain.,Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, 08193 Bellaterra, Spain.,Centro de Investigación Biomédica en Red - Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
| | - José-Luis Corchero
- Centro de Investigación Biomédica en Red - Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain.,Institut de Biotecnologia i Biomedicina (IBB-UAB), 08193 Cerdanyola del Vallès, Spain
| | - Elisabet González-Mira
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, 08193 Bellaterra, Spain.,Centro de Investigación Biomédica en Red - Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
| | | | - Jannik N Pedersen
- Department of Chemistry and Interdisciplinary Nanoscience Center (iNANO), Aarhus University, 8000, Aarhus, Aarhus C Denmark
| | - Natalia García-Aranda
- Centro de Investigación Biomédica en Red - Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain.,Functional Validation and Preclinical Research, Drug Delivery & Targeting, CIBBIM-Nanomedicina, Vall d'Hebron Institute of Research (VHIR), Universitat Autònoma de Barcelona (UAB), 08035 Barcelona, Spain
| | - Edgar Cristóbal-Lecina
- Centro de Investigación Biomédica en Red - Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain.,Institut de Química Avançada de Catalunya (IQAC-CSIC), 08034 Barcelona, Spain
| | | | - Rosa Mendoza
- Centro de Investigación Biomédica en Red - Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain.,Institut de Biotecnologia i Biomedicina (IBB-UAB), 08193 Cerdanyola del Vallès, Spain
| | - Elena Garcia-Fruitós
- Centro de Investigación Biomédica en Red - Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain.,Institut de Biotecnologia i Biomedicina (IBB-UAB), 08193 Cerdanyola del Vallès, Spain
| | | | - Susanne Resch
- BioNanoNet Forschungsgesellschaft mbH, 8010 Graz, Austria
| | | | - Andreas Falk
- BioNanoNet Forschungsgesellschaft mbH, 8010 Graz, Austria
| | - Daniel Pulido
- Centro de Investigación Biomédica en Red - Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain.,Institut de Química Avançada de Catalunya (IQAC-CSIC), 08034 Barcelona, Spain
| | - Miriam Royo
- Centro de Investigación Biomédica en Red - Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain.,Institut de Química Avançada de Catalunya (IQAC-CSIC), 08034 Barcelona, Spain
| | - Simó Schwartz
- Centro de Investigación Biomédica en Red - Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain.,Functional Validation and Preclinical Research, Drug Delivery & Targeting, CIBBIM-Nanomedicina, Vall d'Hebron Institute of Research (VHIR), Universitat Autònoma de Barcelona (UAB), 08035 Barcelona, Spain
| | - Ibane Abasolo
- Centro de Investigación Biomédica en Red - Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain.,Functional Validation and Preclinical Research, Drug Delivery & Targeting, CIBBIM-Nanomedicina, Vall d'Hebron Institute of Research (VHIR), Universitat Autònoma de Barcelona (UAB), 08035 Barcelona, Spain
| | - Jan Skov Pedersen
- Department of Chemistry and Interdisciplinary Nanoscience Center (iNANO), Aarhus University, 8000, Aarhus, Aarhus C Denmark
| | - Dganit Danino
- CryoEM Laboratory of Soft Matter, Faculty of Biotechnology and Food Engineering, Technion - Israel Institute of Technology, 32000 Haifa, Israel
| | | | - Jaume Veciana
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, 08193 Bellaterra, Spain.,Centro de Investigación Biomédica en Red - Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
| | - Santi Sala
- Nanomol Technologies S.L., 08193 Cerdanyola del Vallès, Spain
| | - Nora Ventosa
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, 08193 Bellaterra, Spain.,Centro de Investigación Biomédica en Red - Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
| | - Alba Córdoba
- Nanomol Technologies S.L., 08193 Cerdanyola del Vallès, Spain
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29
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Ospennikov AS, Gavrilov AA, Artykulnyi OP, Kuklin AI, Novikov VV, Shibaev AV, Philippova OE. Transformations of wormlike surfactant micelles induced by a water-soluble monomer. J Colloid Interface Sci 2021; 602:590-601. [PMID: 34147750 DOI: 10.1016/j.jcis.2021.05.062] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 05/10/2021] [Accepted: 05/11/2021] [Indexed: 10/21/2022]
Abstract
HYPOTHESIS Wormlike surfactant micelles (WLMs) are prospective as nanoreactors for micellar copolymerization of hydrophilic and hydrophobic monomers. Hydrophilic monomers can destroy WLMs. Large size and cylindrical shape of micelles can be preserved by high salt content favoring closer packing of surfactant heads. EXPERIMENTS The effect of a water-soluble monomer (acrylamide) on the structure and rheological properties of giant WLMs of an anionic surfactant potassium oleate at different salt content was investigated by combined experimental (SANS, rheometry, fluorescence and NMR spectroscopy, tensiometry) and molecular dynamics simulations studies. FINDINGS At low salt content, when WLMs are linear, acrylamide induces their shortening and transformation into spherical micelles as a result of its incorporation into the micellar corona, leading to the drop of viscosity. At high salt content providing branched WLMs, monomer first triggers their transition to long linear chains, which enhances the viscoelasticity, and then to rods. This is the first report showing that the effect of monomer on the rheological properties is quite different for linear and branched micelles. Using branched micelles allows preserving large WLMs at high water-soluble monomer content, which is favorable for their use as nanoreactors for synthesis of copolymers with high degree of blockiness, which give mechanically tough polymer gels.
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Affiliation(s)
| | - Alexey A Gavrilov
- Physics Department, Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Oleksandr P Artykulnyi
- Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 141980 Dubna, Russia
| | - Alexander I Kuklin
- Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 141980 Dubna, Russia; Moscow Institute of Physics and Technology, 141701 Dolgoprudny, Russia
| | - Valentin V Novikov
- Moscow Institute of Physics and Technology, 141701 Dolgoprudny, Russia; A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Andrey V Shibaev
- Physics Department, Lomonosov Moscow State University, 119991 Moscow, Russia.
| | - Olga E Philippova
- Physics Department, Lomonosov Moscow State University, 119991 Moscow, Russia
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30
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Kubota R, Tanaka W, Hamachi I. Microscopic Imaging Techniques for Molecular Assemblies: Electron, Atomic Force, and Confocal Microscopies. Chem Rev 2021; 121:14281-14347. [DOI: 10.1021/acs.chemrev.0c01334] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Ryou Kubota
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Wataru Tanaka
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Itaru Hamachi
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
- JST-ERATO, Hamachi Innovative Molecular Technology for Neuroscience, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8530, Japan
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31
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Siegl K, Kolik‐Shmuel L, Zhang M, Prévost S, Vishnia K, Mor A, Appavou M, Jafta CJ, Danino D, Gradzielski M. Directed Assembly of Multi-Walled Nanotubes and Nanoribbons of Amino Acid Amphiphiles Using a Layer-by-Layer Approach. Chemistry 2021; 27:6904-6910. [PMID: 33560564 PMCID: PMC8251557 DOI: 10.1002/chem.202005331] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 02/05/2021] [Indexed: 11/22/2022]
Abstract
Monodisperse unilamellar nanotubes (NTs) and nanoribbons (NRs) were transformed to multilamellar NRs and NTs in a well-defined fashion. This was done by using a step-wise approach in which self-assembled cationic amino acid amphiphile (AAA) formed the initial NTs or NRs, and added polyanion produced an intermediate coating. Successive addition of cationic AAA formed a covering AAA layer, and by repeating this layer-by-layer (LBL) procedure, multi-walled nanotubes (mwNTs) and nanoribbons were formed. This process was structurally investigated by combining small-angle neutron scattering (SANS) and cryogenic-transmission electron microscopy (cryo-TEM), confirming the multilamellar structure and the precise layer spacing. In this way the controlled formation of multi-walled suprastructures was demonstrated in a simple and reproducible fashion, which allowed to control the charge on the surface of these 1D aggregates. This pathway to 1D colloidal materials is interesting for applications in life science and creating well-defined building blocks in nanotechnology.
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Affiliation(s)
- Kathrin Siegl
- Stranski-Laboratorium für Physikalische und Theoretische ChemieInstitut für ChemieTechnische Universität BerlinStraße des 17. Juni 12410623BerlinGermany
| | - Luba Kolik‐Shmuel
- CryoEM Laboratory of Soft MatterFaculty of Biotechnology and Food EngineeringTechnion—Israel Institute of TechnologyHaifa3200003Israel
| | - Mingming Zhang
- CryoEM Laboratory of Soft MatterFaculty of Biotechnology and Food EngineeringTechnion—Israel Institute of TechnologyHaifa3200003Israel
| | - Sylvain Prévost
- Institut Max von Laue-Paul Langevin (ILL)71 avenue des Martyrs38042GrenobleFrance
| | - Kalanit Vishnia
- CryoEM Laboratory of Soft MatterFaculty of Biotechnology and Food EngineeringTechnion—Israel Institute of TechnologyHaifa3200003Israel
| | - Amram Mor
- Faculty of Biotechnology and Food EngineeringTechnion—Israel Institute of TechnologyHaifa3200003Israel
| | - Marie‐Sousai Appavou
- Forschungszentrum Jülich GmbH Jülich Centre for Neutron Science (JCNS)Heinz Maier-Leibnitz Zentrum (MLZ)Lichtenbergerstr. 185747GarchingGermany
| | - Charl J. Jafta
- Helmholtz-Zentrum Berlin für Materialien und Energie (HZB)14109BerlinGermany
| | - Dganit Danino
- CryoEM Laboratory of Soft MatterFaculty of Biotechnology and Food EngineeringTechnion—Israel Institute of TechnologyHaifa3200003Israel
- Guangdong Technion—Israel Institute of TechnologyGuangdong ProvinceShantou515063P. R. China
| | - Michael Gradzielski
- Stranski-Laboratorium für Physikalische und Theoretische ChemieInstitut für ChemieTechnische Universität BerlinStraße des 17. Juni 12410623BerlinGermany
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32
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Mesarec L, Drab M, Penič S, Kralj-Iglič V, Iglič A. On the Role of Curved Membrane Nanodomains, and Passive and Active Skeleton Forces in the Determination of Cell Shape and Membrane Budding. Int J Mol Sci 2021; 22:2348. [PMID: 33652934 PMCID: PMC7956631 DOI: 10.3390/ijms22052348] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 02/18/2021] [Accepted: 02/20/2021] [Indexed: 02/03/2023] Open
Abstract
Biological membranes are composed of isotropic and anisotropic curved nanodomains. Anisotropic membrane components, such as Bin/Amphiphysin/Rvs (BAR) superfamily protein domains, could trigger/facilitate the growth of membrane tubular protrusions, while isotropic curved nanodomains may induce undulated (necklace-like) membrane protrusions. We review the role of isotropic and anisotropic membrane nanodomains in stability of tubular and undulated membrane structures generated or stabilized by cyto- or membrane-skeleton. We also describe the theory of spontaneous self-assembly of isotropic curved membrane nanodomains and derive the critical concentration above which the spontaneous necklace-like membrane protrusion growth is favorable. We show that the actin cytoskeleton growth inside the vesicle or cell can change its equilibrium shape, induce higher degree of segregation of membrane nanodomains or even alter the average orientation angle of anisotropic nanodomains such as BAR domains. These effects may indicate whether the actin cytoskeleton role is only to stabilize membrane protrusions or to generate them by stretching the vesicle membrane. Furthermore, we demonstrate that by taking into account the in-plane orientational ordering of anisotropic membrane nanodomains, direct interactions between them and the extrinsic (deviatoric) curvature elasticity, it is possible to explain the experimentally observed stability of oblate (discocyte) shapes of red blood cells in a broad interval of cell reduced volume. Finally, we present results of numerical calculations and Monte-Carlo simulations which indicate that the active forces of membrane skeleton and cytoskeleton applied to plasma membrane may considerably influence cell shape and membrane budding.
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Affiliation(s)
- Luka Mesarec
- Faculty of Electrical Engineering, University of Ljubljana, SI-1000 Ljubljana, Slovenia; (L.M.); (M.D.); (S.P.)
| | - Mitja Drab
- Faculty of Electrical Engineering, University of Ljubljana, SI-1000 Ljubljana, Slovenia; (L.M.); (M.D.); (S.P.)
| | - Samo Penič
- Faculty of Electrical Engineering, University of Ljubljana, SI-1000 Ljubljana, Slovenia; (L.M.); (M.D.); (S.P.)
| | - Veronika Kralj-Iglič
- Faculty of Health Sciences, University of Ljubljana, SI-1000 Ljubljana, Slovenia;
- Institute of Biosciences and Bioresources, National Research Council, 80131 Napoli, Italy
| | - Aleš Iglič
- Faculty of Electrical Engineering, University of Ljubljana, SI-1000 Ljubljana, Slovenia; (L.M.); (M.D.); (S.P.)
- Institute of Biosciences and Bioresources, National Research Council, 80131 Napoli, Italy
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33
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Tomsen-Melero J, Passemard S, García-Aranda N, Díaz-Riascos ZV, González-Rioja R, Nedergaard Pedersen J, Lyngsø J, Merlo-Mas J, Cristóbal-Lecina E, Corchero JL, Pulido D, Cámara-Sánchez P, Portnaya I, Ionita I, Schwartz S, Veciana J, Sala S, Royo M, Córdoba A, Danino D, Pedersen JS, González-Mira E, Abasolo I, Ventosa N. Impact of Chemical Composition on the Nanostructure and Biological Activity of α-Galactosidase-Loaded Nanovesicles for Fabry Disease Treatment. ACS APPLIED MATERIALS & INTERFACES 2021; 13:7825-7838. [PMID: 33583172 DOI: 10.1021/acsami.0c16871] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Fabry disease is a rare lysosomal storage disorder characterized by a deficiency of α-galactosidase A (GLA), a lysosomal hydrolase. The enzyme replacement therapy administering naked GLA shows several drawbacks including poor biodistribution, limited efficacy, and relatively high immunogenicity in Fabry patients. An attractive strategy to overcome these problems is the use of nanocarriers for encapsulating the enzyme. Nanoliposomes functionalized with RGD peptide have already emerged as a good platform to protect and deliver GLA to endothelial cells. However, low colloidal stability and limited enzyme entrapment efficiency could hinder the further pharmaceutical development and the clinical translation of these nanoformulations. Herein, the incorporation of the cationic miristalkonium chloride (MKC) surfactant to RGD nanovesicles is explored, comparing two different nanosystems-quatsomes and hybrid liposomes. In both systems, the positive surface charge introduced by MKC promotes electrostatic interactions between the enzyme and the nanovesicles, improving the loading capacity and colloidal stability. The presence of high MKC content in quatsomes practically abolishes GLA enzymatic activity, while low concentrations of the surfactant in hybrid liposomes stabilize the enzyme without compromising its activity. Moreover, hybrid liposomes show improved efficacy in cell cultures and a good in vitro/in vivo safety profile, ensuring their future preclinical and clinical development.
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Affiliation(s)
- Judit Tomsen-Melero
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Spain
- Nanomol Technologies SL, Campus de la UAB, 08193 Bellaterra, Spain
- Centro de Investigación Biomédica en Red-Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
| | - Solène Passemard
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Spain
- Centro de Investigación Biomédica en Red-Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
| | - Natalia García-Aranda
- Centro de Investigación Biomédica en Red-Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
- Drug Delivery and Targeting, and Functional Validation and Preclinical Research (FVPR), CIBBIM-Nanomedicine, Vall d'Hebron Institut de Recerca (VHIR), Universitat Autònoma de Barcelona, 08035 Barcelona, Spain
| | - Zamira Vanessa Díaz-Riascos
- Centro de Investigación Biomédica en Red-Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
- Drug Delivery and Targeting, and Functional Validation and Preclinical Research (FVPR), CIBBIM-Nanomedicine, Vall d'Hebron Institut de Recerca (VHIR), Universitat Autònoma de Barcelona, 08035 Barcelona, Spain
| | - Ramon González-Rioja
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Spain
- Centro de Investigación Biomédica en Red-Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
| | - Jannik Nedergaard Pedersen
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, DK-8000 Aarhus C, Denmark
- Department of Chemistry, Aarhus University, Langelandsgade 140, DK-8000 Aarhus C, Denmark
| | - Jeppe Lyngsø
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, DK-8000 Aarhus C, Denmark
- Department of Chemistry, Aarhus University, Langelandsgade 140, DK-8000 Aarhus C, Denmark
| | - Josep Merlo-Mas
- Nanomol Technologies SL, Campus de la UAB, 08193 Bellaterra, Spain
| | - Edgar Cristóbal-Lecina
- Centro de Investigación Biomédica en Red-Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
- Institut de Química Avançada de Catalunya (IQAC-CSIC), 08034 Barcelona, Spain
| | - José Luis Corchero
- Centro de Investigación Biomédica en Red-Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
- Departament de Genètica i de Microbiologia, Institut de Biotecnologia i de Biomedicina (IBB), Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Daniel Pulido
- Centro de Investigación Biomédica en Red-Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
- Institut de Química Avançada de Catalunya (IQAC-CSIC), 08034 Barcelona, Spain
| | - Patricia Cámara-Sánchez
- Centro de Investigación Biomédica en Red-Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
- Drug Delivery and Targeting, and Functional Validation and Preclinical Research (FVPR), CIBBIM-Nanomedicine, Vall d'Hebron Institut de Recerca (VHIR), Universitat Autònoma de Barcelona, 08035 Barcelona, Spain
| | - Irina Portnaya
- CryoEM Laboratory of Soft Matter, Faculty of Biotechnology and Food Engineering, Technion-Israel Institute of Technology, 32000 Haifa, Israel
| | - Inbal Ionita
- CryoEM Laboratory of Soft Matter, Faculty of Biotechnology and Food Engineering, Technion-Israel Institute of Technology, 32000 Haifa, Israel
| | - Simó Schwartz
- Centro de Investigación Biomédica en Red-Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
- Drug Delivery and Targeting, CIBBIM-Nanomedicine, Vall d'Hebron Institut de Recerca (VHIR), Universitat Autònoma de Barcelona, 08035 Barcelona, Spain
| | - Jaume Veciana
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Spain
- Centro de Investigación Biomédica en Red-Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
| | - Santi Sala
- Nanomol Technologies SL, Campus de la UAB, 08193 Bellaterra, Spain
| | - Miriam Royo
- Centro de Investigación Biomédica en Red-Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
- Institut de Química Avançada de Catalunya (IQAC-CSIC), 08034 Barcelona, Spain
| | - Alba Córdoba
- Nanomol Technologies SL, Campus de la UAB, 08193 Bellaterra, Spain
| | - Dganit Danino
- CryoEM Laboratory of Soft Matter, Faculty of Biotechnology and Food Engineering, Technion-Israel Institute of Technology, 32000 Haifa, Israel
- Faculty of Biotechnology and Food Engineering, Guangdong Technion-Israel Institute of Technology, Daxue Road, Shantou 515063, Guangdong Province, China
| | - Jan Skov Pedersen
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, DK-8000 Aarhus C, Denmark
- Department of Chemistry, Aarhus University, Langelandsgade 140, DK-8000 Aarhus C, Denmark
| | - Elisabet González-Mira
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Spain
- Centro de Investigación Biomédica en Red-Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
| | - Ibane Abasolo
- Centro de Investigación Biomédica en Red-Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
- Drug Delivery and Targeting, and Functional Validation and Preclinical Research (FVPR), CIBBIM-Nanomedicine, Vall d'Hebron Institut de Recerca (VHIR), Universitat Autònoma de Barcelona, 08035 Barcelona, Spain
| | - Nora Ventosa
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Spain
- Centro de Investigación Biomédica en Red-Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
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Analytical modeling of micelle growth. 4. Molecular thermodynamics of wormlike micelles from ionic surfactants: Theory vs. experiment. J Colloid Interface Sci 2021; 584:561-581. [DOI: 10.1016/j.jcis.2020.10.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Revised: 10/02/2020] [Accepted: 10/03/2020] [Indexed: 12/20/2022]
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Wessels MG, Jayaraman A. Computational Reverse-Engineering Analysis of Scattering Experiments (CREASE) on Amphiphilic Block Polymer Solutions: Cylindrical and Fibrillar Assembly. Macromolecules 2021. [DOI: 10.1021/acs.macromol.0c02265] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Michiel G. Wessels
- Colburn Laboratory, Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy Street, Newark, Delaware 19716, United States
| | - Arthi Jayaraman
- Colburn Laboratory, Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy Street, Newark, Delaware 19716, United States
- Department of Materials Science and Engineering, University of Delaware, Newark, Delaware 19716, United States
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Singh Chauhan P, Abutbul Ionita I, Moshe Halamish H, Sosnik A, Danino D. Multidomain drug delivery systems of β-casein micelles for the local oral co-administration of antiretroviral combinations. J Colloid Interface Sci 2021; 592:156-166. [PMID: 33652169 DOI: 10.1016/j.jcis.2020.12.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 11/20/2020] [Accepted: 12/08/2020] [Indexed: 12/18/2022]
Abstract
The antiretroviral (ARV) cocktailrevolved the treatment of the human immunodeficiency virus (HIV) infection. Drug combinations have been also tested to treat other infectious diseases, including the recentcoronavirus disease 2019 (COVID-19) outbreak. To simplify administration fixed-dose combinationshave been introduced, however, oral anti-HIV therapy still struggles with low oral bioavailability of many ARVs.This work investigated the co-encapsulation of two clinically relevant ARV combinations,tipranavir (TPV):efavirenz (EFV) anddarunavir (DRV):efavirenz (EFV):ritonavir (RTV),within the core of β-casein (bCN) micelles. Encapsulation efficiency in both systems was ~100%. Cryo-transmission electron microscopy and dynamic light scattering of the ARV-loaded colloidaldispersions indicatefull preservation of the spherical morphology, and x-ray diffraction confirm that the encapsulated drugs are amorphous. To prolong the physicochemical stabilitythe formulations were freeze-driedwithout cryo/lyoprotectant, and successfully redispersed, with minor changes in morphology.Then, theARV-loaded micelles were encapsulated within microparticles of Eudragit® L100, which prevented enzymatic degradation and minimized drug release under gastric-like pH conditionsin vitro. At intestinal pH, the coating polymer dissolved and released the nanocarriers and content. Overall, our results confirm the promise of this flexible and modular technology platform for oral delivery of fixed dose combinations.
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Affiliation(s)
- Prakram Singh Chauhan
- CryoEM Laboratory of Soft Matter, Faculty of Biotechnology and Food Engineering, Technion-Israel Institute of Technology, Haifa 3200003, Israel
| | - Inbal Abutbul Ionita
- CryoEM Laboratory of Soft Matter, Faculty of Biotechnology and Food Engineering, Technion-Israel Institute of Technology, Haifa 3200003, Israel
| | - Hen Moshe Halamish
- Laboratory of Pharmaceutical Nanomaterials Science, Department of Materials Science and Engineering, Technion-Israel Institute of Technology, Haifa 3200003, Israel
| | - Alejandro Sosnik
- Laboratory of Pharmaceutical Nanomaterials Science, Department of Materials Science and Engineering, Technion-Israel Institute of Technology, Haifa 3200003, Israel
| | - Dganit Danino
- CryoEM Laboratory of Soft Matter, Faculty of Biotechnology and Food Engineering, Technion-Israel Institute of Technology, Haifa 3200003, Israel; Guangdong Technion - Israel Institute of Technology, Shantou, Guangdong Province 515063, China.
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Raya RK, Štěpánek M, Limpouchová Z, Procházka K, Svoboda M, Lísal M, Pavlova E, Skandalis A, Pispas S. Onion Micelles with an Interpolyelectrolyte Complex Middle Layer: Experimental Motivation and Computer Study. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00560] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Rahul Kumar Raya
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 12840 Prague 2, Czech Republic
| | - Miroslav Štěpánek
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 12840 Prague 2, Czech Republic
| | - Zuzana Limpouchová
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 12840 Prague 2, Czech Republic
| | - Karel Procházka
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 12840 Prague 2, Czech Republic
| | - Martin Svoboda
- Department of Physics, Faculty of Science, J. E. Purkinje University, České mládeže 8, 400 96 Ústí n. Lab., Czech Republic
- Department of Molecular and Mesoscopic Modelling, Institute of Chemical Process Fundamentals of the CAS, Rozvojová 135/1, 165 02 Prague 6, Suchdol, Czech Republic
| | - Martin Lísal
- Department of Physics, Faculty of Science, J. E. Purkinje University, České mládeže 8, 400 96 Ústí n. Lab., Czech Republic
- Department of Molecular and Mesoscopic Modelling, Institute of Chemical Process Fundamentals of the CAS, Rozvojová 135/1, 165 02 Prague 6, Suchdol, Czech Republic
| | - Ewa Pavlova
- Department of Polymer Morphology, Institute of Macromolecular Chemistry of the CAS, Heyrovský Square 2, 160 00 Prague 6, Czech Republic
| | - Athanasios Skandalis
- Theoretical & Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, 11635 Athens, Greece
| | - Stergios Pispas
- Theoretical & Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, 11635 Athens, Greece
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Falsafi SR, Rostamabadi H, Assadpour E, Jafari SM. Morphology and microstructural analysis of bioactive-loaded micro/nanocarriers via microscopy techniques; CLSM/SEM/TEM/AFM. Adv Colloid Interface Sci 2020; 280:102166. [PMID: 32387755 DOI: 10.1016/j.cis.2020.102166] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 04/19/2020] [Accepted: 04/20/2020] [Indexed: 12/11/2022]
Abstract
Efficient characterization of the physicochemical attributes of bioactive-loaded micro/nano-vehicles is crucial for the successful product development. The introduction of outstanding science-based strategies and techniques makes it possible to realize how the characteristics of the formulation ingredients affect the structural and (bio)functional properties of the final bioactive-loaded carriers. The important points to be solved, at a microscopic level, are investigating how the features of the formulation ingredients affect the morphology, surface, size, dispersity, as well as the particulate interactions within bioactive-comprising nano/micro-delivery systems. This review presents a detailed description concerning the application of advanced microscopy techniques, i.e., confocal laser scanning microscopy (CLSM), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and atomic force microscopy (AFM) in characterizing the attributes of nano/microcarriers for the efficient delivery of bioactive compounds. Furthermore, the fundamental principles of these approaches, instrumentation, specific applications, and the strategy to choose the most proper technique for different carriers has been discussed.
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Cohen Y, Rutenberg R, Cohen G, Veltman B, Gvirtz R, Fallik E, Danino D, Eltzov E, Poverenov E. Aminated Polysaccharide-Based Nanoassemblies as Stable Biocompatible Vehicles Enabling Crossing of Biological Barriers: An Effective Transdermal Delivery of Diclofenac Medicine. ACS APPLIED BIO MATERIALS 2020; 3:2209-2217. [PMID: 35025273 DOI: 10.1021/acsabm.0c00048] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A series of stable polysaccharide derivatives that spontaneously self-assemble into nanocarriers was synthesized by applying a reductive amination on chitosan. The prepared nanocarriers were comprehensively studied and found to allow encapsulation of molecular cargo in both aqueous and lipidic media and deliver this cargo across biological barriers. The nanocarriers have demonstrated effective transdermal delivery of diclofenac (Voltaren), a nonsteroidal anti-inflammatory drug, by increasing its skin permeation up to 100 vs the tested control. The modified polysaccharides were studied with a panel of three types of bioreporter bacteria sensitive to genotoxic and cytotoxic stresses. These studies showed the general safety of the prepared nanocarriers and provided insights concerning their activity in collaboration with the aliphatic side chain length. The described nanocarriers could be applied as tunable biocompatible vehicles for the delivery of medicines, cosmetic agents, and in other applications.
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Affiliation(s)
- Yael Cohen
- Agro-Nanotechnology and Advanced Materials Center, Institute of Postharvest and Food Sciences, Agriculture Research Organization, The Volcani Center, Rishon LeZion 7505101, Israel.,Institute of Biochemistry, Food Science and Nutrition, Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 76100, Israel
| | - Roi Rutenberg
- Agro-Nanotechnology and Advanced Materials Center, Institute of Postharvest and Food Sciences, Agriculture Research Organization, The Volcani Center, Rishon LeZion 7505101, Israel.,Institute of Biochemistry, Food Science and Nutrition, Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 76100, Israel.,Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Guy Cohen
- The Skin Research Institute, Dead Sea & Arava Science Center, Masada 86910, Israel
| | - Boris Veltman
- Agro-Nanotechnology and Advanced Materials Center, Institute of Postharvest and Food Sciences, Agriculture Research Organization, The Volcani Center, Rishon LeZion 7505101, Israel.,Institute of Biochemistry, Food Science and Nutrition, Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 76100, Israel
| | - Raanan Gvirtz
- The Skin Research Institute, Dead Sea & Arava Science Center, Masada 86910, Israel
| | - Elazar Fallik
- Agro-Nanotechnology and Advanced Materials Center, Institute of Postharvest and Food Sciences, Agriculture Research Organization, The Volcani Center, Rishon LeZion 7505101, Israel
| | - Dganit Danino
- CryoEM Laboratory of Soft Matter, Faculty of Biotechnology & Food Engineering, Technion - Israel Institute of Technology, Haifa 3200003, Israel
| | - Evgeni Eltzov
- Agro-Nanotechnology and Advanced Materials Center, Institute of Postharvest and Food Sciences, Agriculture Research Organization, The Volcani Center, Rishon LeZion 7505101, Israel
| | - Elena Poverenov
- Agro-Nanotechnology and Advanced Materials Center, Institute of Postharvest and Food Sciences, Agriculture Research Organization, The Volcani Center, Rishon LeZion 7505101, Israel
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Ramishetti S, Hazan-Halevy I, Palakuri R, Chatterjee S, Naidu Gonna S, Dammes N, Freilich I, Kolik Shmuel L, Danino D, Peer D. A Combinatorial Library of Lipid Nanoparticles for RNA Delivery to Leukocytes. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1906128. [PMID: 31999380 DOI: 10.1002/adma.201906128] [Citation(s) in RCA: 97] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 12/04/2019] [Indexed: 05/20/2023]
Abstract
Lipid nanoparticles (LNPs) are the most advanced nonviral platforms for small interfering RNA (siRNA) delivery that are clinically approved. These LNPs, based on ionizable lipids, are found in the liver and are now gaining much attention in the field of RNA therapeutics. The previous generation of ionizable lipids varies in linker moieties, which greatly influences in vivo gene silencing efficiency. Here novel ionizable amino lipids based on the linker moieties such as hydrazine, hydroxylamine, and ethanolamine are designed and synthesized. These lipids are formulated into LNPs and screened for their efficiency to deliver siRNAs into leukocytes, which are among the hardest to transfect cell types. Two potent lipids based on their in vitro gene silencing efficiencies are also identified. These lipids are further evaluated for their biodistribution profile, efficient gene silencing, liver toxicity, and potential immune activation in mice. A robust gene silencing is also found in primary lymphocytes when one of these lipids is formulated into LNPs with a pan leukocyte selective targeting agent (β7 integrin). Taken together, these lipids have the potential to open new avenues in delivering RNAs into leukocytes.
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Affiliation(s)
- Srinivas Ramishetti
- Laboratory of Precision NanoMedicine, School of Molecular Cell Biology and Biotechnology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, 69978, Israel
- Department of Materials Sciences and Engineering, Faculty of Engineering, Tel Aviv University, Tel Aviv, 69978, Israel
- Center for Nanoscience and Nanotechnology and Cancer Biology Research Center, Tel Aviv University, Tel Aviv, 69978, Israel
| | - Inbal Hazan-Halevy
- Laboratory of Precision NanoMedicine, School of Molecular Cell Biology and Biotechnology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, 69978, Israel
- Department of Materials Sciences and Engineering, Faculty of Engineering, Tel Aviv University, Tel Aviv, 69978, Israel
- Center for Nanoscience and Nanotechnology and Cancer Biology Research Center, Tel Aviv University, Tel Aviv, 69978, Israel
| | - Ramesh Palakuri
- Laboratory of Precision NanoMedicine, School of Molecular Cell Biology and Biotechnology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, 69978, Israel
- Department of Materials Sciences and Engineering, Faculty of Engineering, Tel Aviv University, Tel Aviv, 69978, Israel
- Center for Nanoscience and Nanotechnology and Cancer Biology Research Center, Tel Aviv University, Tel Aviv, 69978, Israel
| | - Sushmita Chatterjee
- Laboratory of Precision NanoMedicine, School of Molecular Cell Biology and Biotechnology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, 69978, Israel
- Department of Materials Sciences and Engineering, Faculty of Engineering, Tel Aviv University, Tel Aviv, 69978, Israel
- Center for Nanoscience and Nanotechnology and Cancer Biology Research Center, Tel Aviv University, Tel Aviv, 69978, Israel
| | - Somu Naidu Gonna
- Laboratory of Precision NanoMedicine, School of Molecular Cell Biology and Biotechnology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, 69978, Israel
- Department of Materials Sciences and Engineering, Faculty of Engineering, Tel Aviv University, Tel Aviv, 69978, Israel
- Center for Nanoscience and Nanotechnology and Cancer Biology Research Center, Tel Aviv University, Tel Aviv, 69978, Israel
| | - Niels Dammes
- Laboratory of Precision NanoMedicine, School of Molecular Cell Biology and Biotechnology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, 69978, Israel
- Department of Materials Sciences and Engineering, Faculty of Engineering, Tel Aviv University, Tel Aviv, 69978, Israel
- Center for Nanoscience and Nanotechnology and Cancer Biology Research Center, Tel Aviv University, Tel Aviv, 69978, Israel
| | - Inbar Freilich
- CryoEM Laboratory of Soft Matter, Faculty of Biotechnology and Food Engineering, Technion, Haifa, 3200003, Israel
| | - Luba Kolik Shmuel
- CryoEM Laboratory of Soft Matter, Faculty of Biotechnology and Food Engineering, Technion, Haifa, 3200003, Israel
| | - Dganit Danino
- CryoEM Laboratory of Soft Matter, Faculty of Biotechnology and Food Engineering, Technion, Haifa, 3200003, Israel
| | - Dan Peer
- Laboratory of Precision NanoMedicine, School of Molecular Cell Biology and Biotechnology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, 69978, Israel
- Department of Materials Sciences and Engineering, Faculty of Engineering, Tel Aviv University, Tel Aviv, 69978, Israel
- Center for Nanoscience and Nanotechnology and Cancer Biology Research Center, Tel Aviv University, Tel Aviv, 69978, Israel
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Munusamy S, Conde R, Bertrand B, Munoz-Garay C. Biophysical approaches for exploring lipopeptide-lipid interactions. Biochimie 2020; 170:173-202. [PMID: 31978418 PMCID: PMC7116911 DOI: 10.1016/j.biochi.2020.01.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Accepted: 01/19/2020] [Indexed: 02/07/2023]
Abstract
In recent years, lipopeptides (LPs) have attracted a lot of attention in the pharmaceutical industry due to their broad-spectrum of antimicrobial activity against a variety of pathogens and their unique mode of action. This class of compounds has enormous potential for application as an alternative to conventional antibiotics and for pest control. Understanding how LPs work from a structural and biophysical standpoint through investigating their interaction with cell membranes is crucial for the rational design of these biomolecules. Various analytical techniques have been developed for studying intramolecular interactions with high resolution. However, these tools have been barely exploited in lipopeptide-lipid interactions studies. These biophysical approaches would give precise insight on these interactions. Here, we reviewed these state-of-the-art analytical techniques. Knowledge at this level is indispensable for understanding LPs activity and particularly their potential specificity, which is relevant information for safe application. Additionally, the principle of each analytical technique is presented and the information acquired is discussed. The key challenges, such as the selection of the membrane model are also been briefly reviewed.
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Affiliation(s)
- Sathishkumar Munusamy
- Instituto de Ciencias Físicas, Universidad Nacional Autónoma de México, Av. Universidad 2001, Col. Chamilpa, 62210, Cuernavaca, Mexico
| | - Renaud Conde
- Centro de Investigación Sobre Enfermedades Infecciosas, Instituto Nacional de Salud Pública, Cuernavaca, Morelos, Mexico
| | - Brandt Bertrand
- Instituto de Ciencias Físicas, Universidad Nacional Autónoma de México, Av. Universidad 2001, Col. Chamilpa, 62210, Cuernavaca, Mexico
| | - Carlos Munoz-Garay
- Instituto de Ciencias Físicas, Universidad Nacional Autónoma de México, Av. Universidad 2001, Col. Chamilpa, 62210, Cuernavaca, Mexico.
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Yavrukova VI, Radulova GM, Danov KD, Kralchevsky PA, Xu H, Ung YW, Petkov JT. Rheology of mixed solutions of sulfonated methyl esters and betaine in relation to the growth of giant micelles and shampoo applications. Adv Colloid Interface Sci 2020; 275:102062. [PMID: 31718784 DOI: 10.1016/j.cis.2019.102062] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2019] [Revised: 11/02/2019] [Accepted: 11/03/2019] [Indexed: 11/15/2022]
Abstract
This is a review article on the rheological properties of mixed solutions of sulfonated methyl esters (SME) and cocamidopropyl betaine (CAPB), which are related to the synergistic growth of giant micelles. Effects of additives, such as fatty alcohols, cocamide monoethanolamine (CMEA) and salt, which are expected to boost the growth of wormlike micelles, are studied. We report and systematize the most significant observed effects with an emphasis on the interpretation at molecular level and understanding the rheological behavior of these systems. The experiments show that the mixing of SME and CAPB produces a significant rise of viscosity, which is greater than in the mixed solutions of sodium dodecyl sulfate and CAPB. The addition of fatty alcohols, CMEA and cationic polymer, leads to broadening of the synergistic peak in viscosity without any pronounced effect on its height. The addition of NaCl leads to a typical salt curve with high maximum, but in the presence of dodecanol this maximum is much lower. At lower salt concentrations, the fatty alcohol acts as a thickener, whereas at higher salt concentrations - as a thinning agent. Depending on the shape of the frequency dependences of the measured storage and loss moduli, G' and G", the investigated micellar solutions behave as systems of standard or nonstandard rheological behavior. The systems with standard behavior obey the Maxwell viscoelastic model (at least) up to the crossover point (G' = G") and can be analyzed in terms of the Cates reptation-reaction model. The systems with nonstandard rheological behavior obey the Maxwell model only in a restricted domain below the crossover frequency; they can be analyzed in the framework of an augmented version of the Maxwell model. The methodology for data analysis and interpretation could be applied to any other viscoelastic micellar system.
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Affiliation(s)
- Veronika I Yavrukova
- Department of Chemical and Pharmaceutical Engineering, Faculty of Chemistry and Pharmacy, Sofia University, 1164 Sofia, Bulgaria
| | - Gergana M Radulova
- Department of Chemical and Pharmaceutical Engineering, Faculty of Chemistry and Pharmacy, Sofia University, 1164 Sofia, Bulgaria
| | - Krassimir D Danov
- Department of Chemical and Pharmaceutical Engineering, Faculty of Chemistry and Pharmacy, Sofia University, 1164 Sofia, Bulgaria
| | - Peter A Kralchevsky
- Department of Chemical and Pharmaceutical Engineering, Faculty of Chemistry and Pharmacy, Sofia University, 1164 Sofia, Bulgaria.
| | - Hui Xu
- KLK OLEO, KL-Kepong Oleomas Sdn Bhd, Menara KLK, Jalan PJU 7/6, Mutiara Damansara, 47810 Petaling Jaya, Selangor, Dalur Ehsan, Malaysia
| | - Yee Wei Ung
- KLK OLEO, KL-Kepong Oleomas Sdn Bhd, Menara KLK, Jalan PJU 7/6, Mutiara Damansara, 47810 Petaling Jaya, Selangor, Dalur Ehsan, Malaysia
| | - Jordan T Petkov
- KLK OLEO, KL-Kepong Oleomas Sdn Bhd, Menara KLK, Jalan PJU 7/6, Mutiara Damansara, 47810 Petaling Jaya, Selangor, Dalur Ehsan, Malaysia
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Ghosh R, Satarifard V, Grafmüller A, Lipowsky R. Spherical Nanovesicles Transform into a Multitude of Nonspherical Shapes. NANO LETTERS 2019; 19:7703-7711. [PMID: 31556622 DOI: 10.1021/acs.nanolett.9b02646] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Nanovesicles are closed, bubblelike surfaces with a diameter between 20 and 200 nm, formed by lipid bilayers and biomembranes. Electron microscopy (EM) studies have shown that these vesicles can attain both spherical and nonspherical shapes. One disadvantage of EM methods is that they provide only a single snapshot of each vesicle. Here, we use molecular dynamics simulations to monitor the morphological transformations of individual nanovesicles. We start with the assembly of spherical vesicles that enclose a certain volume of water and contain a certain total number of lipids. When we reduce their volume, the spherical vesicles are observed to transform into a multitude of nonspherical shapes such as oblates and stomatocytes as well as prolates and dumbbells. This surprising polymorphism can be controlled by redistributing a small fraction of lipids between the inner and outer leaflets of the bilayer membranes. As a consequence, the inner and the outer leaflets experience different mechanical tensions. Small changes in the vesicle volume reduce the overall bilayer tension by 2 orders of magnitude, thereby producing tensionless bilayers. In addition, we show how to determine, for a certain total number of lipids, the unique spherical vesicle for which both leaflet tensions vanish individually. We also compute the local spontaneous curvature of the spherical membranes by identifying the first moment of the spherically symmetric stress profiles across the lipid bilayers with the nanoscopic torque as derived from curvature elasticity. Our study can be extended to other types of lipid membranes and sheds new light on cellular nanovesicles such as exosomes, which are increasingly used as biomarkers and drug delivery systems.
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Affiliation(s)
- Rikhia Ghosh
- Theory & Biosystems , Max Planck Institute of Colloids and Interfaces , 14424 Potsdam , Germany
| | - Vahid Satarifard
- Theory & Biosystems , Max Planck Institute of Colloids and Interfaces , 14424 Potsdam , Germany
| | - Andrea Grafmüller
- Theory & Biosystems , Max Planck Institute of Colloids and Interfaces , 14424 Potsdam , Germany
| | - Reinhard Lipowsky
- Theory & Biosystems , Max Planck Institute of Colloids and Interfaces , 14424 Potsdam , Germany
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Shape and fluctuations of frustrated self-assembled nano ribbons. Nat Commun 2019; 10:3565. [PMID: 31395874 PMCID: PMC6687827 DOI: 10.1038/s41467-019-11473-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Accepted: 07/15/2019] [Indexed: 11/08/2022] Open
Abstract
Self-assembly is an important process by which nontrivial structures are formed on the sub-micron scales. Such processes are governed by chemical and physical principles that dictate how the molecular interactions affect the supramolecular geometry. Currently there is no general framework that links between molecular properties and the supramolecular morphology with its size parameters. Here we introduce a new paradigm for the description and analysis of supramolecular structures that self-assemble via short-range interactions. Analysis of molecular interactions determines inputs to the theory of incompatible elasticity, which provides analytic expressions for supramolecular shape and fluctuations. We derive quantitative predictions for specific amphiphiles that self-assembled into chiral nanoribbons. These are quantitatively confirmed experimentally, revealing unique shape evolution, unusual mechanics and statistics, proving that the assemblies are geometrically incompatible. The success in predicting equilibrium and statistics suggests the approach as a new framework for quantitative study of a large variety of self-assembled nanostructures. Supramolecular assemblies achieve nontrivial structures but there is no general framework to link their formation to molecular properties. Here the authors propose a model that relates molecular geometry and interactions to nanoribbon formation, validated by cryo-electron microscopy.
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Abstract
Self-assembly is an important process by which nontrivial structures are formed on the sub-micron scales. Such processes are governed by chemical and physical principles that dictate how the molecular interactions affect the supramolecular geometry. Currently there is no general framework that links between molecular properties and the supramolecular morphology with its size parameters. Here we introduce a new paradigm for the description and analysis of supramolecular structures that self-assemble via short-range interactions. Analysis of molecular interactions determines inputs to the theory of incompatible elasticity, which provides analytic expressions for supramolecular shape and fluctuations. We derive quantitative predictions for specific amphiphiles that self-assembled into chiral nanoribbons. These are quantitatively confirmed experimentally, revealing unique shape evolution, unusual mechanics and statistics, proving that the assemblies are geometrically incompatible. The success in predicting equilibrium and statistics suggests the approach as a new framework for quantitative study of a large variety of self-assembled nanostructures.
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Affiliation(s)
- Mingming Zhang
- The Racah institute of Physics, The Hebrew University of Jerusalem, Jerusalem, Israel
- CryoEM Laboratory of Soft Matter, Faculty of Biotechnology and Food Engineering, Technion-Israel Institute of Technology, Haifa, Israel
| | - Doron Grossman
- The Racah institute of Physics, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Dganit Danino
- CryoEM Laboratory of Soft Matter, Faculty of Biotechnology and Food Engineering, Technion-Israel Institute of Technology, Haifa, Israel
| | - Eran Sharon
- The Racah institute of Physics, The Hebrew University of Jerusalem, Jerusalem, Israel.
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47
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Fan Y, Wang Y. Applications of small-angle X-ray scattering/small-angle neutron scattering and cryogenic transmission electron microscopy to understand self-assembly of surfactants. Curr Opin Colloid Interface Sci 2019. [DOI: 10.1016/j.cocis.2019.02.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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48
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Formulating stable hexosome dispersions with a technical grade diglycerol-based surfactant. J Colloid Interface Sci 2019; 550:73-80. [DOI: 10.1016/j.jcis.2019.04.084] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 04/23/2019] [Accepted: 04/28/2019] [Indexed: 11/21/2022]
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49
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Moore JE, McCoy TM, Sokolova AV, de Campo L, Pearson GR, Wilkinson BL, Tabor RF. Worm-like micelles and vesicles formed by alkyl-oligo(ethylene glycol)-glycoside carbohydrate surfactants: The effect of precisely tuned amphiphilicity on aggregate packing. J Colloid Interface Sci 2019; 547:275-290. [DOI: 10.1016/j.jcis.2019.03.068] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 03/20/2019] [Accepted: 03/21/2019] [Indexed: 10/27/2022]
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50
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Luo H, Jiang K, Liang X, Hua C, Li Y, Liu H. Insights into Morphological Transition of Pluronic P123 Micelles as a Function of Gallate. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.04.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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