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The Effect of the Osmotically Active Compound Concentration Difference on the Passive Water and Proton Fluxes across a Lipid Bilayer. Int J Mol Sci 2021; 22:ijms222011099. [PMID: 34681757 PMCID: PMC8540289 DOI: 10.3390/ijms222011099] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 10/08/2021] [Accepted: 10/11/2021] [Indexed: 11/16/2022] Open
Abstract
The molecular details of the passive water flux across the hydrophobic membrane interior are still a matter of debate. One of the postulated mechanisms is the spontaneous, water-filled pore opening, which facilitates the hydrophilic connection between aqueous phases separated by the membrane. In the paper, we provide experimental evidence showing that the spontaneous lipid pore formation correlates with the membrane mechanics; hence, it depends on the composition of the lipid bilayer and the concentration of the osmotically active compound. Using liposomes as an experimental membrane model, osmotically induced water efflux was measured with the stopped-flow technique. Shapes of kinetic curves obtained at low osmotic pressure differences are interpreted in terms of two events: the lipid pore opening and water flow across the aqueous channel. The biological significance of the dependence of the lipid pore formation on the concentration difference of an osmotically active compound was illustrated by the demonstration that osmotically driven water flow can be accompanied by the dissipation of the pH gradient. The application of the Helfrich model to describe the probability of lipid pore opening was validated by demonstrating that the probability of pore opening correlates with the membrane bending rigidity. The correlation was determined by experimentally derived bending rigidity coefficients and probabilities of lipid pores opening.
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Doskocz J, Dałek P, Foryś A, Trzebicka B, Przybyło M, Mesarec L, Iglič A, Langner M. The effect of lipid phase on liposome stability upon exposure to the mechanical stress. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2020; 1862:183361. [PMID: 32422137 DOI: 10.1016/j.bbamem.2020.183361] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 03/25/2020] [Accepted: 05/11/2020] [Indexed: 10/24/2022]
Abstract
Mechanical properties of a lipid bilayer are parameters determined mainly for giant unilamellar vesicles (GUVs). It is not clear if values obtained on the GUV model can be directly translated to submicron large unilamellar vesicles (LUVs). This ambiguity is a major obstacle in exploring the effect of lipid bilayer mechanics on membrane associated processes and effectiveness of liposome-based targeted drug delivery systems. In presented work extrusion, which is a common method to prepare LUVs, was used to study liposomes preparation and stability upon exposure to mechanical stress. The effect of parameters of the extrusion process (temperature, membrane pore size, extrusion force and volumetric flux) on the properties of liposome suspension (average liposome size, polydispersity index and lipid recovery ratio) was determined for model liposomes composed of DPPC lipid. The state of the DPPC lipid bilayer depends on temperature, therefore, the effect of lipid bilayer mechanics on the extrusion process can be quantitated without altering membrane composition. The extrusion process was carried out with the automated extruder delivering quantitative data on the extrusion force and volumetric flux. Obtained results have been interpreted in terms of mechanical properties of the lipid bilayer. Determined mechanical properties of the lipid bilayer and its dependence on temperature are in good agreement with the literature results determined for GUVs. This shows that mechanical properties of the lipid bilayer does not depend on the liposome size in the range from 100 nm to hundreds of microns.
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Affiliation(s)
- Joanna Doskocz
- Department of Biomedical Engineering, Faculty of Fundamental Problems of Technology, Wrocław University of Science and Technology, 50-377, Wrocław, pl. Grunwaldzki, 13, Poland.
| | - Paulina Dałek
- Department of Biomedical Engineering, Faculty of Fundamental Problems of Technology, Wrocław University of Science and Technology, 50-377, Wrocław, pl. Grunwaldzki, 13, Poland; Lipid Systems sp. z o.o., 54-613 Wrocław, ul. Krzemieniecka 48C, Poland
| | - Aleksander Foryś
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, 41-819 Zabrze, ul. M. Curie-Skłodowskiej 34, Poland
| | - Barbara Trzebicka
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, 41-819 Zabrze, ul. M. Curie-Skłodowskiej 34, Poland
| | | | - Luka Mesarec
- Laboratory of Physics, Faculty of Electrical Engineering, University of Ljubljana, SI-1000 Ljubljana, Tržaška 25, Slovenia
| | - Aleš Iglič
- Laboratory of Physics, Faculty of Electrical Engineering, University of Ljubljana, SI-1000 Ljubljana, Tržaška 25, Slovenia.; Laboratory of Mass Spectrometry and Proteomics, Institute of Biosciences and BioResources, National Research Council, 80131 Napoli, Pietro Castellino 111, Italy
| | - Marek Langner
- Lipid Systems sp. z o.o., 54-613 Wrocław, ul. Krzemieniecka 48C, Poland
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Harper RA, Carpenter GH, Proctor GB, Harvey RD, Gambogi RJ, Geonnotti AR, Hider R, Jones SA. Diminishing biofilm resistance to antimicrobial nanomaterials through electrolyte screening of electrostatic interactions. Colloids Surf B Biointerfaces 2019; 173:392-399. [DOI: 10.1016/j.colsurfb.2018.09.018] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 08/30/2018] [Accepted: 09/08/2018] [Indexed: 02/06/2023]
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Brodszkij E, Hviid MJ, Ade C, Schattling PS, Burmeister M, Szilagyi S, Gal N, Zhu C, Han X, Städler B. Interaction of pH-responsive polyanions with phospholipid membranes. Polym Chem 2019. [DOI: 10.1039/c9py00924h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The behavior of two acrylate polymers, with carboxylic acid side groups, was investigated with regard to their pH-responsive interaction with phospholipid membranes.
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Affiliation(s)
- Edit Brodszkij
- Interdisciplinary Nanoscience Center (iNANO)
- Aarhus University
- 8000 Aarhus
- Denmark
| | - Martin J. Hviid
- Interdisciplinary Nanoscience Center (iNANO)
- Aarhus University
- 8000 Aarhus
- Denmark
| | - Carina Ade
- Interdisciplinary Nanoscience Center (iNANO)
- Aarhus University
- 8000 Aarhus
- Denmark
| | | | - Moritz Burmeister
- Interdisciplinary Nanoscience Center (iNANO)
- Aarhus University
- 8000 Aarhus
- Denmark
| | - Sven Szilagyi
- Interdisciplinary Nanoscience Center (iNANO)
- Aarhus University
- 8000 Aarhus
- Denmark
| | - Noga Gal
- Interdisciplinary Nanoscience Center (iNANO)
- Aarhus University
- 8000 Aarhus
- Denmark
| | - Chuntao Zhu
- Interdisciplinary Nanoscience Center (iNANO)
- Aarhus University
- 8000 Aarhus
- Denmark
- State Key Laboratory of Urban Water Resource and Environment School of Chemistry and Chemical Engineering
| | - Xiaojun Han
- State Key Laboratory of Urban Water Resource and Environment School of Chemistry and Chemical Engineering
- Harbin Institute of Technology
- Harbin
- China
| | - Brigitte Städler
- Interdisciplinary Nanoscience Center (iNANO)
- Aarhus University
- 8000 Aarhus
- Denmark
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Rosicka-Kaczmarek J, Stasiuk M, Nebesny E, Komisarczyk A. Fluorimetric studies of the interactions of wheat puroindolines with polar lipids on the surface starch granules. J Cereal Sci 2015. [DOI: 10.1016/j.jcs.2015.10.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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6
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Man D, Olchawa R, Kubica K. Membrane fluidity and the surface properties of the lipid bilayer: ESR experiment and computer simulation. J Liposome Res 2010; 20:211-8. [PMID: 19857052 DOI: 10.3109/08982100903286485] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Penetration of the liposome membranes formed in the gel phase from DPPC (DPPC liposomes) and in the liquid-crystalline phase from egg yolk lecithin (EYL liposomes) by the TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl) and 16 DOXYL (2-ethyl-2-(15-methoxy-oxopentadecyl)-4,4-dimethyl-3-oxazolidinyloxy) spin probes has been investigated. The penetration process was followed by 120 hours at 24(0)C, using the electron spin resonance (ESR) method. The investigation of the kinetics of the TEMPO probe building into the membranes of both types of liposomes revealed differences appearing 30 minutes after the start of the experiment. The number of TEMPO particles built into the EYL liposome membranes began to clearly rise, aiming asymptotically to a constant value after about 100 minutes, whereas the number of the TEMPO particles built into the DPPC liposome membranes was almost constant in time. The interpretation of the obtained experimental results was enriched with those of computer simulation, following the behavior of the polar heads (dipoles) of the lipid particles forming a lipid layer due to the change in the value of the model parameter, k, determining the mobility of the dipoles. The possibility of the formation of an irregular ordering of the polar part of lipid membranes was proved, which leads to the appearance of spaces filled with of water for k > 0.4. The appearance of these defects enables the penetration of the bilayer by the TEMPO particles. The limited mobility of lipid polar heads (k < 0.2) prevents the appearance of such areas facilitating the penetration of the lipid membrane by alien particles in the gel phase.
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Affiliation(s)
- Dariusz Man
- Institute of Physics, Opole University, Opole, Poland.
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Gruber B, Stadlbauer S, Späth A, Weiss S, Kalinina M, König B. Modulare Chemosensoren auf Basis selbstorganisierter Vesikelmembranen mit künstlichen Rezeptoren und fluoreszierenden Reportergruppen. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201001101] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Gruber B, Stadlbauer S, Späth A, Weiss S, Kalinina M, König B. Modular Chemosensors from Self-Assembled Vesicle Membranes with Amphiphilic Binding Sites and Reporter Dyes. Angew Chem Int Ed Engl 2010; 49:7125-8. [DOI: 10.1002/anie.201001101] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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9
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Stasiuk M, Kozubek A. Membrane perturbing properties of natural phenolic and resorcinolic lipids. FEBS Lett 2008; 582:3607-13. [DOI: 10.1016/j.febslet.2008.09.039] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2008] [Revised: 09/16/2008] [Accepted: 09/18/2008] [Indexed: 11/29/2022]
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Przybyło M, Olzyńska A, Han S, Ozyhar A, Langner M. A fluorescence method for determining transport of charged compounds across lipid bilayer. Biophys Chem 2007; 129:120-5. [PMID: 17566633 DOI: 10.1016/j.bpc.2007.05.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2006] [Revised: 05/15/2007] [Accepted: 05/15/2007] [Indexed: 11/26/2022]
Abstract
There is a constant need for simple, economical and time-efficient methods which allow evaluating a compound's ability to penetrate the biological membrane, one of the key parameters needed to characterize biologically active compounds. In the paper we propose a new method of permeability determination. Instead of detecting the compound's concentration directly, we employ an approach in which the membrane interface is labeled with a fluorescein lipid probe; the probe is sensitive to the presence of charged compounds. The fluorescence intensity changes of the dye permanently attached to both sides of a model lipid bilayer are measured. Specifically, the time course of the fluorescence intensity changes following a rapid induction of a non-equilibrium state of the sample allows the evaluation of the membrane permeability for the compound. The method was validated by the determination of the phenyltin compound's transport through the model phosphatidylcholine unilamellar liposome bilayer.
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Affiliation(s)
- Magda Przybyło
- Wrocław University of Technology, Department of Biomedical Engineering and Measurements, Wyb. Wyspiańskiego 27, 50-370 Wrocław, Poland.
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Kotulska M, Kubica K. Structural and energetic model of the mechanisms for reduced self-diffusion in a lipid bilayer with increasing ionic strength. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2005; 72:061903. [PMID: 16485970 DOI: 10.1103/physreve.72.061903] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2005] [Revised: 09/22/2005] [Indexed: 05/06/2023]
Abstract
Ionic concentration of the buffer strongly affects properties of a lipid membrane, such as membrane durability (e.g., in electroporation experiments), lateral diffusion coefficient, and zeta potential. The effect of ionic strength is studied by Monte Carlo simulations based on the improved Pink model with explicitly included interactions between lipid heads. We examine the energetic profile of the membrane, conformation of lipid molecules, and molecular interactions. The study is provided for dipalmitoyl-phosphatidylcholine (DPPC) membrane in the gel (300 K) and fluid (330 K) temperatures for the ionic strength in the range 10-3000 mM at several values of dielectric constant. At high ionic strength, the simulations indicate an increase of the membrane stability due to the screening of the repulsive forces between lipid heads, more stable conformation of lipid chains, and denser packing of the molecules. These effects may account for reduced lateral diffusion in the membrane, as observed in experiments. The simulation also suggests that chains tend to assume a more straightened configuration and the number of standing polar heads increases, which may contribute to thickening of the membrane. An increase of the head tilt dependent on ionic strength may account for the greater value of zeta potential. The model shows stronger electropermebilization of the membrane in external electric field when ionic strength is low.
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Affiliation(s)
- Malgorzata Kotulska
- Department of Biomedical Engineering and Instrumentation, Wroclaw University of Technology, 50-370 Wroclaw, Poland
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Kubica K. Computer simulation studies on significance of lipid polar head orientation. COMPUTERS & CHEMISTRY 2002; 26:351-6. [PMID: 12139418 DOI: 10.1016/s0097-8485(01)00127-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Models of lipid bilayer were extended and dipole structure of polar head in lipid molecules was included. As a result a wavy structure, resembling experimentally observed 'ripple phase', was obtained. The discussion on significance of interactions between dipoles that constitute polar part of the model membrane is presented. Assumptions of the model are closer to the real conditions and reflect the real phenomena much better. Dependence of the model system behaviour on dielectric permeability, ionic strength, and temperature was studied. An influence of reduced number of freedom degrees in the dipole system on the membrane properties was also considered. It was proved that if dielectric permeability of membrane polar part is significantly smaller than water dielectric permeability then the membrane model does not have to take into account changeability of dipole tilt towards membrane surface. This assumption becomes more significant for dielectric permeability epsilon approaching epsilon = 80. Packing degree of hydrocarbon chains in hydrophobic part of the membrane is also responsible for the angle value between dipoles and the membrane surface. The model results are compared to experimental results obtained by means of fluorescence probe fluorescein-PE.
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Affiliation(s)
- Krystian Kubica
- Department of Physics and Biophysics, Agricultural University, Norwida, Wrocław, Poland.
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Borisenko V, Zhang Z, Woolley GA. Gramicidin derivatives as membrane-based pH sensors. BIOCHIMICA ET BIOPHYSICA ACTA 2002; 1558:26-33. [PMID: 11750261 DOI: 10.1016/s0005-2736(01)00415-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Ion channels provide a means for sensitive pH measurement at membrane interfaces. Detailed knowledge of the structure and function of gramicidin channels permits the engineering of pH-sensitive derivatives. Two derivatives, gramicidin-ethylenediamine and gramicidin-histamine, are shown to exhibit pH-dependent single-channel behaviour over the pH ranges 9-11 and 6.5-8.5, respectively. Thermal isomerization of a carbamate group at the entrance of the channels leads to a pattern of steps in single-channel recordings. The size of the steps depends on the time-averaged degree of protonation of the appended group (ethylenediamine or histamine). Measurement of the size of the steps thus permits single-molecule pH sensing under symmetrical pH conditions or in the presence of a pH gradient.
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Affiliation(s)
- Vitali Borisenko
- Department of Chemistry, 80 St George Street, University of Toronto, M5S 3H6, Toronto, ON, Canada
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Alakoskela JMI, Kinnunen PKJ. Probing Phospholipid Main Phase Transition by Fluorescence Spectroscopy and a Surface Redox Reaction. J Phys Chem B 2001. [DOI: 10.1021/jp011080b] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Juha-Matti I. Alakoskela
- Helsinki Biophysics and Biomembrane Group, Institute of Biomedicine/Biochemistry, University of Helsinki, Helsinki, Finland
| | - Paavo K. J. Kinnunen
- Helsinki Biophysics and Biomembrane Group, Institute of Biomedicine/Biochemistry, University of Helsinki, Helsinki, Finland
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