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Hsieh AH, Franses EI, Corti DS. Effects of the Method of Preparation and Dispersion Media on the Optical Properties and Particle Sizes of Aqueous Dispersions of a Double-Chain Cationic Surfactant. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:8290-8304. [PMID: 34185999 DOI: 10.1021/acs.langmuir.1c01069] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
As inferred from visual observations and turbidity measurements, the average radius of the unilamellar vesicles formed in water from the cationic double-chain surfactant didodecyldimethylammonium bromide (DDAB) varies with the method of preparation, being ∼24 nm after sonication (SS method) and ∼74 nm after extrusion/ultrafiltration (SE method). The radii were larger when the vesicles were produced in 10 mM NaBr, ∼65 nm for the SS method and ∼280 nm for the SE method. The specific turbidity, or turbidity per unit path length divided by the surfactant weight fraction, w, of these vesicular dispersions increased with decreasing w until a constant value was reached at w*, which depends on the preparation method and the dispersion medium. The constant specific turbidities are indicative of single and independent scattering and were used to estimate vesicle radii by solving the specific turbidity equations derived for the Rayleigh-Debye-Gans (RDG) regime. Two turbidity equations were used, one accounting for absorbance errors due to some scattered light reaching the detector and another with no correction. Estimates of the average distances between the vesicles and their corresponding Debye lengths were obtained for evaluating the importance of intervesicle electrostatic interactions, which could lead to dependent scattering at higher weight fractions.
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Affiliation(s)
- An-Hsuan Hsieh
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, Indiana 47907-2100, United States
| | - Elias I Franses
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, Indiana 47907-2100, United States
| | - David S Corti
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, Indiana 47907-2100, United States
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Rayleigh and Rayleigh-Debye-Gans light scattering intensities and spetroturbidimetry of dispersions of unilamellar vesicles and multilamellar liposomes. J Colloid Interface Sci 2020; 578:471-483. [DOI: 10.1016/j.jcis.2020.05.085] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 05/20/2020] [Accepted: 05/21/2020] [Indexed: 11/22/2022]
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Wang A, Chan Miller C, Szostak JW. Core-Shell Modeling of Light Scattering by Vesicles: Effect of Size, Contents, and Lamellarity. Biophys J 2019; 116:659-669. [PMID: 30686489 PMCID: PMC6382849 DOI: 10.1016/j.bpj.2019.01.006] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 12/26/2018] [Accepted: 01/02/2019] [Indexed: 12/19/2022] Open
Abstract
Having a fast, reliable method for characterizing vesicles is vital for their use as model cell membranes in biophysics, synthetic biology, and origins of life studies. Instead of the traditionally used Rayleigh-Gans-Debye approximation, we use an exact extended Lorenz-Mie solution for how core-shell particles scatter light to model vesicle turbidity. This approach enables accurate interpretations of simple turbidimetric measurements and is able to accurately model highly scattering vesicles, such as larger vesicles, those with multiple layers, and those with encapsulated material. We uncover several surprising features, including that vesicle lamellarity has a larger effect on sample turbidity than vesicle size and that the technique can be used to measure the membrane thickness of vesicles. We also examine potential misinterpretations of turbidimetry and discuss when measurements are limited by forward and multiple scattering and by the geometry of the instrument.
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Affiliation(s)
- Anna Wang
- Department of Molecular Biology and Center for Computational and Integrative Biology, Massachusetts General Hospital, Boston, Massachusetts.
| | - Christopher Chan Miller
- Atomic and Molecular Physics Division, Harvard Smithsonian Center for Astrophysics, Cambridge, Massachusetts
| | - Jack W Szostak
- Department of Molecular Biology and Center for Computational and Integrative Biology, Massachusetts General Hospital, Boston, Massachusetts.
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Schultze E, Coradini K, dos Santos Chaves P, da Silva LP, Buss J, Guterres SS, Collares T, Beck RCR, Pohlmann AR, Seixas FK. Drug-loaded nanoemulsion as positive control is an alternative to DMSO solutions for in vitro evaluation of curcumin delivery to MCF-7 cells. Pharmacol Rep 2017; 69:1408-1412. [DOI: 10.1016/j.pharep.2017.05.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Revised: 05/04/2017] [Accepted: 05/09/2017] [Indexed: 10/19/2022]
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Affiliation(s)
- Xin Yi
- Beijing
Innovation Center for Engineering Science and Advanced Technology
(BIC-ESAT), and Department of Mechanics and Engineering Science, College
of Engineering, Peking University, 5 Yiheyuan Road, Haidian District, Beijing 100871, China
- School
of Engineering, Brown University, 182 Hope Street, Providence, Rhode Island 02912, United States
| | - Huajian Gao
- School
of Engineering, Brown University, 182 Hope Street, Providence, Rhode Island 02912, United States
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Spangler EJ, Upreti S, Laradji M. Partial wrapping and spontaneous endocytosis of spherical nanoparticles by tensionless lipid membranes. J Chem Phys 2016; 144:044901. [PMID: 26827231 PMCID: PMC4723410 DOI: 10.1063/1.4939764] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Accepted: 12/25/2015] [Indexed: 12/25/2022] Open
Abstract
Computer simulations of an implicit-solvent particle-based model are performed to investigate the interactions between small spherical nanoparticles and tensionless lipid bilayers. We found that nanoparticles are either unbound, wrapped by the bilayer, or endocytosed. The degree of wrapping increases with increasing the adhesion strength. The transition adhesion strength between the unbound and partially wrapped states decreases as the nanoparticle diameter is increased. We also observed that the transition adhesion strength between the wrapped states and endocytosis state decreases with increasing the nanoparticle diameter. The partial wrapping of the nanoparticles by the tensionless bilayer is explained by an elastic theory which accounts for the fact that the interaction between the nanoparticle and the bilayer extends beyond the contact region. The theory predicts that for small nanoparticles, the wrapping angle increases continuously with increasing the adhesion strength. However, for relatively large nanoparticles, the wrapping angle exhibits a discontinuity between weakly and strongly wrapped states. The size of the gap in the wrapping angle between the weakly wrapped and strongly wrapped states increases with decreasing the range of nanoparticle-bilayer interaction.
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Affiliation(s)
- Eric J Spangler
- Department of Biomedical Engineering, The University of Memphis, Memphis, Tennessee 38152, USA
| | - Sudhir Upreti
- Department of Physics and Materials Science, The University of Memphis, Memphis, Tennessee 38152, USA
| | - Mohamed Laradji
- Department of Physics and Materials Science, The University of Memphis, Memphis, Tennessee 38152, USA
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Zhang Y, Wang X, Ma S, Jiang K, Han X. Lipid membrane formation on chemical gradient modified surfaces. RSC Adv 2016. [DOI: 10.1039/c5ra26205d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The relationship between surface wetting properties and lipid membrane status formed via giant unilamellar vesicle rupture was investigated using chemical gradient surfaces.
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Affiliation(s)
- Ying Zhang
- State Key Laboratory of Urban Water Resource and Environment
- School of Chemical Engineering and Technology
- Harbin Institute of Technology
- Harbin
- China
| | - Xuejing Wang
- State Key Laboratory of Urban Water Resource and Environment
- School of Chemical Engineering and Technology
- Harbin Institute of Technology
- Harbin
- China
| | - Shenghua Ma
- State Key Laboratory of Urban Water Resource and Environment
- School of Chemical Engineering and Technology
- Harbin Institute of Technology
- Harbin
- China
| | - Kunpeng Jiang
- State Key Laboratory of Urban Water Resource and Environment
- School of Chemical Engineering and Technology
- Harbin Institute of Technology
- Harbin
- China
| | - Xiaojun Han
- State Key Laboratory of Urban Water Resource and Environment
- School of Chemical Engineering and Technology
- Harbin Institute of Technology
- Harbin
- China
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He X, Lin M, Guo J, Qu Z, Xu F. Experimental and simulation studies of polyarginines across the membrane of giant unilamellar vesicles. RSC Adv 2016. [DOI: 10.1039/c6ra02420c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Cell-penetrating peptides have widespread applications in biomedicine because of their capability to translocate across cell membranes alone or with cargos.
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Affiliation(s)
- XiaoCong He
- Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education
- School of Energy and Power Engineering
- Xi'an Jiaotong University
- Xi'an 710049
- P.R. China
| | - Min Lin
- Bioinspired Engineering and Biomechanics Center (BEBC)
- Xi'an Jiaotong University
- Xi'an 710049
- P.R. China
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education
| | - Jun Guo
- Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education
- School of Energy and Power Engineering
- Xi'an Jiaotong University
- Xi'an 710049
- P.R. China
| | - ZhiGuo Qu
- Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education
- School of Energy and Power Engineering
- Xi'an Jiaotong University
- Xi'an 710049
- P.R. China
| | - Feng Xu
- Bioinspired Engineering and Biomechanics Center (BEBC)
- Xi'an Jiaotong University
- Xi'an 710049
- P.R. China
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education
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Liu J, Lu N, Li J, Weng Y, Yuan B, Yang K, Ma Y. Influence of surface chemistry on particle internalization into giant unilamellar vesicles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:8039-8045. [PMID: 23738716 DOI: 10.1021/la4015652] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Cellular uptake of materials plays a key role in their biomedical applications. In this work, based on the cell-mimic giant unilamellar vesicles (GUVs) and a novel type of microscale materials consisting of stimuli-responsive poly(N-isopropylacrylamide) microgel particles and the incorporated lipids, the influence of particle surface chemistry, including hydrophobic/hydrophilic property and lipid decorations, on the adsorption and consequent internalization of particles into GUVs was investigated. It is found that the decoration of particle surface with lipids facilitates the adsorption of particles on GUV membrane. After that, the hydrophobic property of particle surface further triggers the internalization of particles into GUVs. These results demonstrate the importance of surface properties of particles on their interactions with lipid membranes and are helpful to the understanding of cellular uptake mechanism.
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Affiliation(s)
- Jiaojiao Liu
- Center for Soft Condensed Matter Physics and Interdisciplinary Research, Soochow University, Suzhou, 215006, PR China
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Schöps R, Amado E, Müller SS, Frey H, Kressler J. Block copolymers in giant unilamellar vesicles with proteins or with phospholipids. Faraday Discuss 2013; 166:303-15. [DOI: 10.1039/c3fd00062a] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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