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Maiti A, Daschakraborty S. Can Urea and Trimethylamine- N-oxide Prevent the Pressure-Induced Phase Transition of Lipid Membrane? J Phys Chem B 2022; 126:1426-1440. [PMID: 35139638 DOI: 10.1021/acs.jpcb.1c08891] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Organisms dwelling in ocean trenches are exposed to the high hydrostatic pressure of ocean water. Increasing pressure can alter the membrane packing density and fluidity and trigger the fluid-to-gel phase transition. To combat environmental stress, the organisms synthesize small polar solutes, which are known as osmolytes. Urea and trimethylamine-N-oxide (TMAO) are two such solutes found in deep-sea creatures. While TMAO stabilizes protein, urea induces protein denaturation. These solutes strongly influence the packing density and membrane fluidity of the lipid bilayer at different conditions. But can these solutes affect the pressure-induced phase transition of the lipid membrane? In the present work, we have studied the effect of these two solutes on pressure-induced fluid-to-gel phase transition based on the all-atom molecular dynamics (MD) simulation approach. A high-pressure-stimulated fluid-to-gel phase transition of the membrane is seen at 800 bar, which is consistent with previous experiments. We have also observed that in the low-pressure region (1-400 bar), urea slightly increases the membrane fluidity where TMAO decreases the same. However, the phase transition pressure remains almost unchanged on the addition of urea while TMAO shifts the phase transition toward a lower pressure. We have found that the hydrogen (H)-bond interaction between lipid and urea plays an important role in preserving the fluidity of the membrane in the low-pressure zone. However, at a higher pressure, both water and urea are excluded from the membrane surface. TMAO is also excluded from the interfacial region of the membrane at all pressures. Exclusion from the membrane surface further triggers the phase transition of the lipid membrane from the fluid to gel phase at a high pressure.
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Affiliation(s)
- Archita Maiti
- Department of Chemistry, Indian Institute of Technology Patna, Bihar 801106, India
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2
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Busignies V, Arruda DC, Charrueau C, Ribeiro MCS, Lachagès AM, Malachias A, Finet S, Rehman AU, Bigey P, Tchoreloff P, Escriou V. Compression of Vectors for Small Interfering RNAs Delivery: Toward Oral Administration of siRNA Lipoplexes in Tablet Forms. Mol Pharm 2020; 17:1159-1169. [PMID: 32125867 DOI: 10.1021/acs.molpharmaceut.9b01190] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Currently, most nonviral nucleic acid vectors are in the form of colloidal suspensions administered primarily parenterally. This type of formulation and the mode of administration impose strong constraints such as the size of the administered vectors or the production of sterile preparations. The tablet form provides access to easy oral administration, well accepted by patients; As regards nucleic acid vectors, a dry form represents an advance in terms of stability. Using an optimized lipid-based small interfering RNA-delivery system, we studied the tabletability of a liquid suspension of these vectors. We optimized the conditions of freeze-drying by choosing excipients and process, allowing for the conservation of both the gene-silencing efficacy of the formulated siRNAs and the supramolecular structure of the lipid particulate system. Gene-silencing efficacy was assayed on luciferase-expressing cells and the structure of the siRNA vector in freeze-dried and tablet forms was examined using small-angle X-ray scattering (SAXS) synchrotron radiation. The freeze-dried powders were then mixed with excipients necessary for the good progress of the compression by allowing for a regular supply of the matrix and the reduction of friction. The compression was carried out using a rotary press simulator that allows for complete monitoring of the compression conditions. After compression, formulated siRNAs retained more than 60% of their gene-silencing efficacy. Within the tablets, a specific SAXS signal was detectable and the lamellar and cubic phases of the initial liquid suspension were restored after resuspension of siRNA vectors by disintegration of the tablets. These results show that the bilayer lipid structures of the particles were preserved despite the mechanical constraints imposed by the compression. If such a result could be expected after the freeze-drying step, it was never shown, to our knowledge, that siRNA-delivery systems could retain their efficacy and structure after mechanical stress such as compression. This opens promising perspectives to oral administration of siRNA as an alternative to parenteral administration.
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Affiliation(s)
- Virginie Busignies
- Univ. Bordeaux, CNRS, Arts et Metiers Institute of Technology, Bordeaux INP, INRAE I2M, Bordeaux F-33400, Talence, France
| | - Danielle Campiol Arruda
- Faculdade de Farmácia, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil.,Université de Paris, UTCBS, CNRS, INSERM, F-75006 Paris, France
| | | | - Marcela Coelho Silva Ribeiro
- Faculdade de Farmácia, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil.,Université de Paris, UTCBS, CNRS, INSERM, F-75006 Paris, France
| | | | - Angelo Malachias
- Departamento de Física, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil
| | - Stéphanie Finet
- Sorbonne Université, IMPMC, CNRS, MNHN, F-75005 Paris, France
| | - Asad Ur Rehman
- Université de Paris, UTCBS, CNRS, INSERM, F-75006 Paris, France
| | - Pascal Bigey
- Université de Paris, UTCBS, CNRS, INSERM, F-75006 Paris, France.,PSL University, ChimieParisTech, F-75005 Paris, France
| | - Pierre Tchoreloff
- Univ. Bordeaux, CNRS, Arts et Metiers Institute of Technology, Bordeaux INP, INRAE I2M, Bordeaux F-33400, Talence, France
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Surmeier G, Paulus M, Salmen P, Dogan S, Sternemann C, Nase J. Cholesterol modulates the pressure response of DMPC membranes. Biophys Chem 2019; 252:106210. [PMID: 31265976 DOI: 10.1016/j.bpc.2019.106210] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 06/12/2019] [Accepted: 06/19/2019] [Indexed: 11/16/2022]
Abstract
In this work, the effect of cholesterol on the pressure response of solid-supported phospholipid multilayers is analyzed. It is shown that DMPC multilayers become highly pressure-responsive by the incorporation of low amounts of cholesterol, resulting in a strong pressure-induced expansion of the bilayer spacing. This is accompanied by a high tendency of the multilayer system to detach from the substrate. Increasing the cholesterol concentration reduces the pressure-induced expansion and the membrane structure remains largely unchanged upon pressurization, consequently the stability of the multilayers improves. For a determination of the influence of the substrate, the pressure-dependent behavior of multilayers is compared to that of solid-supported bilayers and multi-lamellar vesicles in bulk solution. While single-supported bilayers remain largely unaffected by external pressure independent of their cholesterol content, multi-lamellar vesicles and multilayers behave similarly.
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Affiliation(s)
- Göran Surmeier
- Fakultät Physik/DELTA, Technische Universität Dortmund, 44221 Dortmund, Germany
| | - Michael Paulus
- Fakultät Physik/DELTA, Technische Universität Dortmund, 44221 Dortmund, Germany
| | - Paul Salmen
- Fakultät Physik/DELTA, Technische Universität Dortmund, 44221 Dortmund, Germany
| | - Susanne Dogan
- Fakultät Physik/DELTA, Technische Universität Dortmund, 44221 Dortmund, Germany
| | | | - Julia Nase
- Fakultät Physik/DELTA, Technische Universität Dortmund, 44221 Dortmund, Germany.
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Potekhin SA, Khusainova RS. On the Width of Conformational Transitions of Biologically Important Macromolecules under the Influence of Pressure. Biophysics (Nagoya-shi) 2019. [DOI: 10.1134/s0006350919030187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Federiconi F, Mattioni M, Baldassarri EJ, Ortore MG, Mariani P. How soft are biological helices? A measure of axial and lateral force constants in folate quadruplexes by high-pressure X-ray diffraction. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2011; 40:1225-35. [PMID: 21713534 DOI: 10.1007/s00249-011-0717-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2011] [Revised: 05/14/2011] [Accepted: 05/20/2011] [Indexed: 01/04/2023]
Abstract
Alkaline folates self-associate in aqueous solutions to form columnar lyotropic phases. Such phases are made by quadruplexes, which are supramolecular helicoidal structures formed by a stacked array of folate tetramers. High-pressure synchrotron X-ray diffraction is used to analyze alkaline folate quadruplex stability and energetics. Diffraction data show that both inter-helical lateral and tetramer stacking distances decrease as a function of pressure. Lateral and axial quadruplex compressibilities and force constants have been derived and strong correlation between the strength of tetramer stacking and pressure effects demonstrated. In particular, quadruplex rigidity increases by changing Na+ to K+ and by adding excess KCl, as a consequence of increased stacking interactions and quadruplex elongation.
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Marsh D. Pivotal surfaces in inverse hexagonal and cubic phases of phospholipids and glycolipids. Chem Phys Lipids 2011; 164:177-83. [DOI: 10.1016/j.chemphyslip.2010.12.010] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2010] [Accepted: 12/21/2010] [Indexed: 11/29/2022]
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Yaghmur A, Kriechbaum M, Amenitsch H, Steinhart M, Laggner P, Rappolt M. Effects of pressure and temperature on the self-assembled fully hydrated nanostructures of monoolein-oil systems. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:1177-1185. [PMID: 19681634 DOI: 10.1021/la9023019] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Synchrotron small-angle X-ray scattering (SAXS) was applied for studying the effects of hydrostatic pressure and temperature on the structural behavior of fully hydrated tetradecane (TC)-loaded monoolein (MO) systems. Our main attention focused on investigating the impact of isobaric and isothermal changes on the stability of the inverted type discontinuous Fd3m cubic phase as compared to the inverted type hexagonal (H(2)) liquid crystalline phase. The present results show that compressing the TC-loaded Fd3m phase under isothermal conditions induces a significant increase of its lattice parameter: it approximately increases by 1 A per 75 bar. Further, the Fd3m phase is more pressure-sensitive as compared to the Pn3m and the H(2) phases. At ambient temperatures, we observed the following structural transitions as pressure increases: Fd3m --> H(2) --> Pn3m. Our findings under isobaric conditions reveal more complicated structural transitions. At high pressures, we recorded the interesting temperature-induced structural transition of (Pn3m + L(alpha)) --> (Pn3m + L(alpha) + H(2)) --> (L(alpha) + H(2)) --> H(2) --> Fd3m --> traces of Fd3m coexisting with L(2). At high pressures and low temperatures, the TC molecules partially crystallize as indicated by the appearance of an additional diffraction peak at q = 3.46 nm(-1). This crystallite disappears at high temperatures and also as the system gets decompressed. The appearance of the Pn3m and the L(alpha) phases during compressing the fully hydrated MO/TC samples at high pressures and low temperatures is generally related to a growing hydrocarbon chain condensation, which leads to membrane leaflets with less negative interfacial curvatures (decreasing the spontaneous curvatures |H(0)|). Both the effects of pressure and temperature are discussed in detail for all nonlamellar phases on the basis of molecular shape and packing concepts.
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Affiliation(s)
- Anan Yaghmur
- Institute of Biophysics and Nanosystems Research, Austrian Academy of Sciences, Graz, Austria.
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Potekhin S, Senin A, Abdurakhmanov N, Khusainova R. High pressure effect on the main transition from the ripple gel P′β phase to the liquid crystal (Lα) phase in dipalmitoylphosphatidylcholine. Microcalorimetric study. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2008; 1778:2588-93. [DOI: 10.1016/j.bbamem.2008.08.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2008] [Revised: 07/31/2008] [Accepted: 08/04/2008] [Indexed: 11/30/2022]
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Paccamiccio L, Pisani M, Spinozzi F, Ferrero C, Finet S, Mariani P. Pressure effects on lipidic direct phases: the dodecyl trimethyl ammonium chloride-water system. J Phys Chem B 2007; 110:12410-8. [PMID: 16800567 DOI: 10.1021/jp054467d] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The direct lyotropic polymorphism of dodecyltrimethylammonium chloride (DTAC) was investigated by synchrotron X-ray diffraction at different water concentrations under compression up to 2 kbar, i.e., in the pressure intermediate range where interesting biophysical transformations occur and the functional characteristics of cell membranes are altered. The results show that pressure induces the transition from the hexagonal phase to the micellar Pm3n cubic phase in hydrated samples (c between 0.5 and 0.6, c being the weight concentration of lipid in the mixture) and the transition from the bicontinuous Ia3d cubic phase to the hexagonal phase in drier samples (c = 0.8). By increasing the pressure on very dry samples, a lamellar L(alpha) phase was observed to form transitorily at the Ia3d cubic-hexagonal phase transition. Phase compressibility and then the lipid and water partial molecular compressibilities were derived as a function of pressure and concentration. As a result, we assessed the very low compressibility of the hydration water within the lipid phases, and we demonstrated that the compressibility of DTAC is very dependent on pressure. Moreover, the molecular parameters of DTAC calculated in the different phases during compression confirmed that pressure induces small but continuous conformational changes, definitely different from the large changes observed in lipid molecules forming type II structures.
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Affiliation(s)
- Lydia Paccamiccio
- Dipartimento di Scienze Applicate ai Sistemi Complessi, Università Politecnica delle Marche, Via Ranieri 65, I-60131 Ancona, Italy
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Seddon JM, Squires AM, Conn CE, Ces O, Heron AJ, Mulet X, Shearman GC, Templer RH. Pressure-jump X-ray studies of liquid crystal transitions in lipids. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2006; 364:2635-55. [PMID: 16973480 DOI: 10.1098/rsta.2006.1844] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
In this paper, we give an overview of our studies by static and time-resolved X-ray diffraction of inverse cubic phases and phase transitions in lipids. In [section sign] 1, we briefly discuss the lyotropic phase behaviour of lipids, focusing attention on non-lamellar structures, and their geometric/topological relationship to fusion processes in lipid membranes. Possible pathways for transitions between different cubic phases are also outlined. In [section sign] 2, we discuss the effects of hydrostatic pressure on lipid membranes and lipid phase transitions, and describe how the parameters required to predict the pressure dependence of lipid phase transition temperatures can be conveniently measured. We review some earlier results of inverse bicontinuous cubic phases from our laboratory, showing effects such as pressure-induced formation and swelling. In [section sign] 3, we describe the technique of pressure-jump synchrotron X-ray diffraction. We present results that have been obtained from the lipid system 1:2 dilauroylphosphatidylcholine/lauric acid for cubic-inverse hexagonal, cubic-cubic and lamellar-cubic transitions. The rate of transition was found to increase with the amplitude of the pressure-jump and with increasing temperature. Evidence for intermediate structures occurring transiently during the transitions was also obtained. In [section sign] 4, we describe an IDL-based 'AXcess' software package being developed in our laboratory to permit batch processing and analysis of the large X-ray datasets produced by pressure-jump synchrotron experiments. In [section sign] 5, we present some recent results on the fluid lamellar-Pn3m cubic phase transition of the single-chain lipid 1-monoelaidin, which we have studied both by pressure-jump and temperature-jump X-ray diffraction. Finally, in [section sign] 6, we give a few indicators of future directions of this research. We anticipate that the most useful technical advance will be the development of pressure-jump apparatus on the microsecond time-scale, which will involve the use of a stack of piezoelectric pressure actuators. The pressure-jump technique is not restricted to lipid phase transitions, but can be used to study a wide range of soft matter transitions, ranging from protein unfolding and DNA unwinding and transitions, to phase transitions in thermotropic liquid crystals, surfactants and block copolymers.
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Affiliation(s)
- John M Seddon
- Department of Chemistry, Imperial College London, London SW7 2AZ, UK.
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Ausili P, Pisani M, Finet S, Amenitsch H, Ferrero C, Mariani P. Pressure Effects on Columnar Lyotropics: Anisotropic Compressibilities in Guanosine Monophosphate Four-Stranded Helices. J Phys Chem B 2004. [DOI: 10.1021/jp036829s] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Pamela Ausili
- Istituto di Scienze Fisiche and INFM, Università di Ancona, Via Ranieri 65, I-60131 Ancona, Italy, European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble Cedex, France, Sincrotrone Trieste S.C.p.A., Strada Statale 14, km 163.5, I-34016 Basovizza (Trieste), Italy, and Institute of Biophysics and X-ray Structure Research, Austrian Academy of Sciences, Graz, Austria
| | - Michela Pisani
- Istituto di Scienze Fisiche and INFM, Università di Ancona, Via Ranieri 65, I-60131 Ancona, Italy, European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble Cedex, France, Sincrotrone Trieste S.C.p.A., Strada Statale 14, km 163.5, I-34016 Basovizza (Trieste), Italy, and Institute of Biophysics and X-ray Structure Research, Austrian Academy of Sciences, Graz, Austria
| | - Stephanie Finet
- Istituto di Scienze Fisiche and INFM, Università di Ancona, Via Ranieri 65, I-60131 Ancona, Italy, European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble Cedex, France, Sincrotrone Trieste S.C.p.A., Strada Statale 14, km 163.5, I-34016 Basovizza (Trieste), Italy, and Institute of Biophysics and X-ray Structure Research, Austrian Academy of Sciences, Graz, Austria
| | - Heinz Amenitsch
- Istituto di Scienze Fisiche and INFM, Università di Ancona, Via Ranieri 65, I-60131 Ancona, Italy, European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble Cedex, France, Sincrotrone Trieste S.C.p.A., Strada Statale 14, km 163.5, I-34016 Basovizza (Trieste), Italy, and Institute of Biophysics and X-ray Structure Research, Austrian Academy of Sciences, Graz, Austria
| | - Claudio Ferrero
- Istituto di Scienze Fisiche and INFM, Università di Ancona, Via Ranieri 65, I-60131 Ancona, Italy, European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble Cedex, France, Sincrotrone Trieste S.C.p.A., Strada Statale 14, km 163.5, I-34016 Basovizza (Trieste), Italy, and Institute of Biophysics and X-ray Structure Research, Austrian Academy of Sciences, Graz, Austria
| | - Paolo Mariani
- Istituto di Scienze Fisiche and INFM, Università di Ancona, Via Ranieri 65, I-60131 Ancona, Italy, European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble Cedex, France, Sincrotrone Trieste S.C.p.A., Strada Statale 14, km 163.5, I-34016 Basovizza (Trieste), Italy, and Institute of Biophysics and X-ray Structure Research, Austrian Academy of Sciences, Graz, Austria
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