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El Hajj F, Fuchs PFJ, Urbach W, Nassereddine M, Hamieh S, Taulier N. Molecular Study of Ultrasound-Triggered Release of Fluorescein from Liposomes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:3868-3881. [PMID: 33769822 DOI: 10.1021/acs.langmuir.0c03444] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Several investigations have suggested that ultrasound triggers the release of drugs encapsulated into liposomes at acoustic pressures low enough to avoid cavitation or high hyperthermia. However, the mechanism leading to this triggered release as well as the adequate composition of the liposome membrane remains unknown. Here, we investigate the ultrasound-triggered release of fluorescein disodium salt encapsulated into liposomes made of 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC) or 1,2-distearoylphosphatidyl-ethanolamine (DSPC) lipids with various concentrations of cholesterol (from 0 to 44 mol %). The passive release of encapsulated fluorescein was first characterized. It was observed to be higher when the membrane is in a fluid phase and increased with temperature but decreased upon addition of cholesterol. Next, the release of fluorescein was measured at different acoustic frequencies (0.8, 1.1, and 3.3 MHz) and peak-to-peak pressures (0, 2, 2.5, 5, and 8 MPa). Measurements were performed at temperatures where DOPC and DSPC liposomes were, respectively, in the fluid or gel phase. We found that the release rate did not depend on the ultrasound frequency. For DOPC liposomes, the ultrasound-triggered release of fluorescein decreased with increasing concentration of cholesterol in liposomes, while the behavior was more complex for DSPC liposomes. Overall, the triggered release from DSPC liposomes was up to ten times less than DOPC liposomes. Molecular dynamics simulations performed on a pure DOPC membrane showed that a membrane experiences, under a directional pressure of ±2.4 MPa, various changes in properties such as the area per lipid (APL). An increase in the APL was notably observed when the simulation box was laterally stretched or perpendicularly compressed, which was accompanied by an increase in the number of water molecules crossing the membrane. This suggests that ultrasound most probably enhances the diffusion of encapsulated molecules at small acoustic pressures by increasing the distance between lipids.
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Affiliation(s)
- Fatima El Hajj
- Sorbonne Université, CNRS, INSERM, Laboratoire d'Imagerie Biomédicale, LIB, F-75006 Paris, France
- Faculté des Sciences, Université Libanaise, Hadath 1003, Liban
| | - Patrick F J Fuchs
- Université de Paris, UFR Sciences du Vivant, F-75013 Paris, France
- Sorbonne Université, Ecole Normale Supérieure, PSL Research University, CNRS, Laboratoire des Biomolécules (LBM), F-75005 Paris, France
| | - Wladimir Urbach
- Laboratoire de Physique de l'École Normale Supérieure, ENS, Université PSL, CNRS, Sorbonne Université, Université de Paris, F-75005 Paris, France
| | | | - Salah Hamieh
- Faculté des Sciences, Université Libanaise, Hadath 1003, Liban
| | - Nicolas Taulier
- Sorbonne Université, CNRS, INSERM, Laboratoire d'Imagerie Biomédicale, LIB, F-75006 Paris, France
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Phase behavior of cholesterol-containing binary membrane of an ether-linked phospholipid, dihexadecylphosphatidylcholine. Colloid Polym Sci 2018. [DOI: 10.1007/s00396-018-4280-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Kitayama H, Takechi Y, Tamai N, Matsuki H, Yomota C, Saito H. Thermotropic phase behavior of hydrogenated soybean phosphatidylcholine-cholesterol binary liposome membrane. Chem Pharm Bull (Tokyo) 2014; 62:58-63. [PMID: 24390493 DOI: 10.1248/cpb.c13-00587] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2023]
Abstract
By combination of differential scanning calorimetry (DSC) and fluorescence spectroscopy of 6-propionyl-2-(dimethylamino)naphthalene (Prodan), we elucidated the thermotropic phase behavior of hydrogenated soybean phosphatidylcholine (HSPC)-cholesterol binary liposome membrane which has similar lipid composition to Doxil®, the widely used liposome product in treatment of various tumors. We found that the characteristic points at cholesterol mole fraction (Xch)=0.023 and 0.077 correspond to the hexagonal lattice, in which cholesterol molecules are considered to be regularly distributed in all regions of HSPC lipid bilayer with 1 : 42 and 1 : 12 units, respectively, as static averaged structures. Apparent endothermic peak disappeared at Xch=0.40 in the DSC thermograms, indicating the existence of single liquid ordered phase at Xch>0.40. In addition, fluorescence measurements of Prodan and its lauroyl derivative in poly(ethylene glycol) (PEG)-modified liposomes indicated that PEG modification has a negligible effect on the phase behavior of HSPC-cholesterol binary liposome membrane. These results may provide useful information in developing novel liposome products whose stability and encapsulated drug release are controlled.
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Affiliation(s)
- Hiroki Kitayama
- Institute of Health Biosciences and Graduate School of Pharmaceutical Sciences, The University of Tokushima
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Tamai N, Izumikawa T, Fukui S, Uemura M, Goto M, Matsuki H, Kaneshina S. How does acyl chain length affect thermotropic phase behavior of saturated diacylphosphatidylcholine-cholesterol binary bilayers? BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2013; 1828:2513-23. [PMID: 23791704 DOI: 10.1016/j.bbamem.2013.06.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Revised: 05/31/2013] [Accepted: 06/11/2013] [Indexed: 11/28/2022]
Abstract
Thermotropic phase behavior of diacylphosphatidylcholine (CnPC)-cholesterol binary bilayers (n=14-16) was examined by fluorescence spectroscopy using 6-propionyl-2-(dimethylamino)naphthalene (Prodan) and differential scanning calorimetry. The former technique can detect structural changes of the bilayer in response to the changes in polarity around Prodan molecules partitioned in a relatively hydrophilic region of the bilayer, while the latter is sensitive to the conformational changes of the acyl chains. On the basis of the data from both techniques, we propose possible temperature T-cholesterol composition Xch phase diagrams for these binary bilayers. A notable feature of our phase diagrams, including our previous results for diheptadecanoylphosphatidylcholine (C17PC) and distearoylphosphatidylcholine (C18PC), is that there is a peritectic-like point around Xch=0.15, which can be interpreted as indicating the formation of a 1:6-complex of cholesterol and CnPCs within the binary bilayer irrespective of the acyl chain length. We could give a reasonable explanation for such complex formation using the modified superlattice view. Our results also showed that the Xch value of the abolition of the main transition is almost constant for n=14-17 (ca. 0.33), while it increases to ca. 0.50 for n=18. By contrast, a biphasic n-dependence of Xch was observed for the abolition of the pretransition, suggesting that there are at least two antagonistic n-dependent factors. We speculate that this could be explained by the enhancement of the van der Waals interaction with increases in n and the weakening of the repulsion between the neighboring headgroups with decreases in n.
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Affiliation(s)
- Nobutake Tamai
- Department of Life System, Institute of Technology and Science, The University of Tokushima, 2-1 Minamijosanjima-cho, Tokushima 770-8506, Japan
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Banc A, Bauduin P, Desbat B, Ly I, Diat O. Ion Extraction Mechanism Studied in a Lyotropic Lamellar Phase. J Phys Chem B 2011; 115:1376-84. [DOI: 10.1021/jp108585f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Amélie Banc
- Institut de Chimie Séparative de Marcoule, UMR 5257 (CEA/CNRS/UM2/ENSCM), BP 17171, F-30206 Bagnols sur Cèze, France
| | - Pierre Bauduin
- Institut de Chimie Séparative de Marcoule, UMR 5257 (CEA/CNRS/UM2/ENSCM), BP 17171, F-30206 Bagnols sur Cèze, France
| | - Bernard Desbat
- Laboratoire de Chimie et Biologie des Membranes et Nanoobjets, Université Bordeaux-1, UMR 5248-CNRS, ENITAB, 2 rue Robert Escarpit, F-33607 Pessac, France
| | - Isabelle Ly
- Centre de Recherche Paul-Pascal, Université Bordeaux-1 CNRS, UPR 8641, 115 avenue A. Schweitzer, F-33600 Pessac, France
| | - Olivier Diat
- Institut de Chimie Séparative de Marcoule, UMR 5257 (CEA/CNRS/UM2/ENSCM), BP 17171, F-30206 Bagnols sur Cèze, France
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Marsh D. Liquid-ordered phases induced by cholesterol: a compendium of binary phase diagrams. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2010; 1798:688-99. [PMID: 20060378 DOI: 10.1016/j.bbamem.2009.12.027] [Citation(s) in RCA: 171] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2009] [Revised: 12/08/2009] [Accepted: 12/29/2009] [Indexed: 12/21/2022]
Abstract
Mixtures of phospholipids with cholesterol are able to form liquid-ordered phases that are characterised by short-range orientational order and long-range translational disorder. These L(o)-phases are distinct from the liquid-disordered, fluid L(alpha)-phases and the solid-ordered, gel L(beta)-phases that are assumed by the phospholipids alone. The liquid-ordered phase can produce spatially separated in-plane fluid domains, which, in the form of lipid rafts, are thought to act as platforms for signalling and membrane sorting in cells. The areas of domain formation are defined by the regions of phase coexistence in the phase diagrams for the binary mixtures of lipid with cholesterol. In this paper, the available binary phase diagrams of lipid-cholesterol mixtures are all collected together. It is found that there is not complete agreement between different determinations of the phase diagrams for the same binary mixture. This can be attributed to the indirect methods largely used to establish the phase boundaries. Intercomparison of the various data sets allows critical assessment of which phase boundaries are rigorously established from direct evidence for phase coexistence.
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Affiliation(s)
- Derek Marsh
- Max-Planck-Institut für biophysikalische Chemie, Abteilung Spektroskopie und photochemische Kinetik, 37070 Göttingen, Germany.
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Pillai BK, Jasuja R, Simard JR, Hamilton JA. Fast diffusion of very long chain saturated fatty acids across a bilayer membrane and their rapid extraction by cyclodextrins: implications for adrenoleukodystrophy. J Biol Chem 2009; 284:33296-304. [PMID: 19801636 PMCID: PMC2785172 DOI: 10.1074/jbc.m109.043737] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2009] [Revised: 09/28/2009] [Indexed: 12/24/2022] Open
Abstract
Abnormalities in the transport of saturated very long chain fatty acids (VLCFA; >C18:0) contribute to their toxic levels in peroxisomal disorders of fatty acid metabolism, such as adrenoleukodystrophy and adrenomyeloneuropathy. We previously showed that VLCFA desorb much slower than normal dietary fatty acids from both albumin and protein-free lipid bilayers. The important step of transbilayer movement (flip-flop) was not measured directly as a consequence of this very slow desorption from donors, and the extremely low aqueous solubility of VLCFA precludes addition of unbound VLCFA to lipid membranes. We have overcome these limitations using methyl-beta-cyclodextrin to solubilize VLCFA for rapid delivery to "acceptor" phosphatidylcholine vesicles (small and large unilamellar) and to cells. VLCFA binding was monitored in real time with the fluorescent probe fluorescein-labeled phosphatidylethanolamine in the outer membrane leaflet, and entrapped pyranine was used to detect flip-flop across the membrane. The upper limit of the rate of flip-flop across the membrane was independent of temperature and media viscosity and was similar for model raft and non-raft membranes as well as living cells. We further showed that cyclodextrins can extract VLCFA rapidly (within seconds) from vesicles and cells, which have implications for the mechanism and potential alternative approaches to treat adrenoleukodystrophy. Because VLCFA diffuse through the lipid bilayer, proteins may not be required for their transport across the peroxisomal membrane.
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Affiliation(s)
| | - Ravi Jasuja
- Section of Endocrinology, Diabetes and Nutrition, and
| | - Jeffrey R. Simard
- From the Department of Biophysics and Physiology
- Department of Pharmacology and Experimental Therapeutics, Boston University School of Medicine and
| | - James A. Hamilton
- From the Department of Biophysics and Physiology
- the Department of Biomedical Engineering, Boston University, Boston, Massachusetts 02118
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Nishimoto M, Hata T, Goto M, Tamai N, Kaneshina S, Matsuki H, Ueda I. Interaction modes of long-chain fatty acids in dipalmitoylphosphatidylcholine bilayer membrane: contrast to mode of inhalation anesthetics. Chem Phys Lipids 2009; 158:71-80. [DOI: 10.1016/j.chemphyslip.2009.02.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2008] [Revised: 12/22/2008] [Accepted: 02/06/2009] [Indexed: 10/21/2022]
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