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Abstract
Fatty acids, cholesterol, and phospholipids are amphiphilic compounds of biological interest, which form ordered monolayers mimicking biomembranes, and can be studied with the Langmuir technique using surface pressure-area isotherms and compressibility plots. Proteins are also components of biomembranes or are present in body fluids. In this study, the influence of lysozyme on different films of a fatty acid (stearic acid or oleic acid), cholesterol, a phospholipid (dipalmitoylphosphatidylcholine, DPPC, or palmitoyloleoylphosphatidylcholine, POPC), and mixtures of them is presented using a 0.9% saline solution as subphase. Results show that the presence of lysozyme alters the lipid monolayer formation in an important way at the beginning (low surface pressures) and the middle (intermediate surface pressures) parts of the isotherm. At high surface pressures, the phospholipids DPPC and POPC and the saturated fatty acid, stearic acid, expel lysozyme from the surface, while oleic acid and cholesterol permit the presence of lysozyme on it. The mixtures of oleic acid-DPPC also expel lysozyme from the surface at high surface pressures, while mixtures of oleic acid-POPC and cholesterol-POPC permit the presence of lysozyme on it. The compressibility of the monolayer is affected in all cases, with an important reduction in the elastic modulus values and an increase in the fluidity, especially at low and intermediate surface pressures.
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2
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Guo F, Wang J, Zhou J, Qian K, Qu H, Liu P, Zhai S. All-atom molecular dynamics simulations of the combined effects of different phospholipids and cholesterol content on electroporation. RSC Adv 2022; 12:24491-24500. [PMID: 36128384 PMCID: PMC9425445 DOI: 10.1039/d2ra03895a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Accepted: 07/27/2022] [Indexed: 11/21/2022] Open
Abstract
In this paper, we applied all-atom molecular dynamics (MD) simulations to study the effects of phospholipids and cholesterol content on bilayer membrane electroporation.
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Affiliation(s)
- Fei Guo
- Institute of Ecological Safety, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
| | - Ji Wang
- Institute of Ecological Safety, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
| | - Jiong Zhou
- Institute of Ecological Safety, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
| | - Kun Qian
- Institute of Ecological Safety, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
| | - Hongchun Qu
- Institute of Ecological Safety, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
| | - Ping Liu
- Institute of Ecological Safety, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
| | - Shidong Zhai
- Institute of Ecological Safety, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
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Fidalgo Rodríguez JL, Dynarowicz-Latka P, Miñones Conde J. How unsaturated fatty acids and plant stanols affect sterols plasma level and cellular membranes? Review on model studies involving the Langmuir monolayer technique. Chem Phys Lipids 2020; 232:104968. [PMID: 32896519 DOI: 10.1016/j.chemphyslip.2020.104968] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 08/21/2020] [Accepted: 08/28/2020] [Indexed: 11/18/2022]
Abstract
The Langmuir monolayer technique has long been known for its usefulness to study the interaction between molecules and mimic cellular membranes to understand the mechanism of action of biologically relevant molecules. In this review we summarize the results that provided insight into the potential mechanism for lowering the plasma level of cholesterol by hypocholesterolemic substances (unsaturated fatty acids (UFAs) and phytocompounds) - in the aspect of prevention of atherosclerosis - and their effects on model biomembranes. The results on UFAs/cholesterol (oxysterols) interactions indicate that these systems are miscible and strongly interacting, contrary to immiscible systems containing saturated fatty acids. Lowering of cholesterol plasma level by UFAs was attributed to the strong affinity between UFAs and sterols, resulting in the formation of high stability complexes, in which sterols were bound and eliminated from the body. Studies on the effect of UFAs and plant sterols/stanols on simplified biomembranes (modeled as cholesterol/DPPC system) indicated that the studied hypocholesterolemic substances modify the biophysical properties of model membrane, affecting its fluidity and interactions between membrane components. Both UFAs and plant sterols/stanols were found to loosen interactions between DPPC and cholesterol and decrease membrane rigidity caused by the excess cholesterol in biomembrane, thus compensating strong condensing effect of cholesterol and restoring proper membrane fluidity, which is of utmost importance for normal cells functioning. The agreement between model - in vitro - studies and biological results prove the usefulness of the Langmuir monolayer technique, which helps in understanding the mode of action of biologically relevant substances.
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Affiliation(s)
- J L Fidalgo Rodríguez
- Department of Physical Chemistry, Faculty of Pharmacy, University of Santiago de Compostela, Spain.
| | - P Dynarowicz-Latka
- Department of General Chemistry Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
| | - J Miñones Conde
- Department of Physical Chemistry, Faculty of Pharmacy, University of Santiago de Compostela, Spain
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Botet-Carreras A, Montero MT, Sot J, Domènech Ò, Borrell JH. Characterization of monolayers and liposomes that mimic lipid composition of HeLa cells. Colloids Surf B Biointerfaces 2020; 196:111288. [PMID: 32759004 DOI: 10.1016/j.colsurfb.2020.111288] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 07/20/2020] [Accepted: 07/27/2020] [Indexed: 10/23/2022]
Abstract
In this work, based on several studies, we develop an artificial lipid membrane to mimic the HeLa cell membrane using 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphatidylcholine (POPC), 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphoethanolamine (POPE), 1-palmitoyl-2-oleoyl-sn-glycero-3-phospho-l-serine (POPS) and cholesterol (CHOL). This is then a means to further study the fusion process of specific engineered liposomes. To characterize the mimicked HeLa cell membrane, we determined a series of surface pressure-area (π-A) isotherms and the isothermal compression modulus was calculated together with the dipole moment normal to the plane of the monolayer. The existence of laterally segregated domains was assessed using a fluorescence technique (Laurdan) and two microscopy techniques: Brewster angle microscopy (BAM) and atomic force microscopy (AFM) of Langmuir-Blodgett films (LBs) extracted at 30 mN m-1. To examine the nature and composition of the observed domains, force spectroscopy (FS) based on AFM was applied to the LBs. Finally, two engineered liposome formulations were tested in a fusion assay against mimicked HeLa cell membrane LBs, showing good results and thereby opening the door to further assays and uses.
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Affiliation(s)
- Adrià Botet-Carreras
- Secció de Fisicoquímica, Facultat de Farmàcia i Ciències de l'Alimentació, Spain; Institute of Nanoscience and Nanotechnology (IN(2)UB), Universitat de Barcelona (UB), 08028, Barcelona, Catalonia, Spain
| | - M Teresa Montero
- Secció de Fisicoquímica, Facultat de Farmàcia i Ciències de l'Alimentació, Spain; Institute of Nanoscience and Nanotechnology (IN(2)UB), Universitat de Barcelona (UB), 08028, Barcelona, Catalonia, Spain
| | - Jesús Sot
- Instituto Biofisika (CSIC-UPV/HEU, Campus Universitario, 48940, Leioa, Basque Country, Spain
| | - Òscar Domènech
- Secció de Fisicoquímica, Facultat de Farmàcia i Ciències de l'Alimentació, Spain; Institute of Nanoscience and Nanotechnology (IN(2)UB), Universitat de Barcelona (UB), 08028, Barcelona, Catalonia, Spain
| | - Jordi H Borrell
- Secció de Fisicoquímica, Facultat de Farmàcia i Ciències de l'Alimentació, Spain; Institute of Nanoscience and Nanotechnology (IN(2)UB), Universitat de Barcelona (UB), 08028, Barcelona, Catalonia, Spain.
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Derradi R, Bolean M, Simão A, Caseli L, Millán J, Bottini M, Ciancaglini P, Ramos A. Cholesterol Regulates the Incorporation and Catalytic Activity of Tissue-Nonspecific Alkaline Phosphatase in DPPC Monolayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:15232-15241. [PMID: 31702926 PMCID: PMC7105399 DOI: 10.1021/acs.langmuir.9b02590] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Matrix vesicles (MVs) are a special class of extracellular vesicles that drive bone and dentin mineralization by providing the essential enzymes and ions for the nucleation and propagation of mineral crystals. Tissue-nonspecific alkaline phosphatase (TNAP) is an integral protein of MV membrane and participates in biomineralization by hydrolyzing extracellular pyrophosphate (PPi), a strong mineralization inhibitor, and forming inorganic phosphate (Pi), necessary for the growth of mineral crystals inside MVs and their propagation once released in the extracellular matrix. MV membrane is enriched in cholesterol (CHOL), which influences the incorporation and activity of integral proteins in biologic membranes; however, how CHOL controls the incorporation and activity of TNAP in MV membrane has not yet been elucidated. In the present study, Langmuir monolayers were used as a MV membrane biomimetic model to assess how CHOL affects TNAP incorporation and activity. Surface pressure-area (π-A) isotherms of binary dipalmitoilphosphatidylcholine (DPPC)/CHOL monolayers showed that TNAP incorporation increases with CHOL concentration. Infrared spectroscopy showed that CHOL influences the conformation and orientation of the enzyme. Optical-fluorescence micrographs of the monolayers revealed the tendency of TNAP to incorporate into CHOL-rich microdomains. These data suggest that TNAP penetrates more efficiently and occupies a higher surface area into monolayers with a lower CHOL concentration due to the higher membrane fluidity. However, the quantity of enzyme transferred to solid supports as well as the enzymatic activity were higher using monolayers with a higher CHOL concentration due to increased rigidity that changes the enzyme orientation at the air-solid interface. These data provide new insights regarding the interfacial behavior of TNAP and CHOL in MVs and shed light on the biochemical and biophysical processes occurring in the MV membrane during biomineralization at the molecular level.
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Affiliation(s)
- R. Derradi
- Chemistry Department, Faculty of Philosophy, Sciences and Letters at Ribeirao Preto, Department of Chemistry, University of Sao Paulo, Avenida Bandeirantes, 3900, Monte Alegre, Ribeirao Preto, SP, Brazil, 14040-901
| | - M. Bolean
- Chemistry Department, Faculty of Philosophy, Sciences and Letters at Ribeirao Preto, Department of Chemistry, University of Sao Paulo, Avenida Bandeirantes, 3900, Monte Alegre, Ribeirao Preto, SP, Brazil, 14040-901
| | - A.M.S. Simão
- Chemistry Department, Faculty of Philosophy, Sciences and Letters at Ribeirao Preto, Department of Chemistry, University of Sao Paulo, Avenida Bandeirantes, 3900, Monte Alegre, Ribeirao Preto, SP, Brazil, 14040-901
| | - L. Caseli
- Institute of Environmental, Chemical and Pharmaceutical Sciences, Federal University of Sao Paulo, Rua Sao Nicolau, 210, Centro, Diadema, SP, Brazil, 09913-030
| | - J.L. Millán
- Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA
| | - M. Bottini
- Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA
- Department of Experimental Medicine, University of Rome Tor Vergata, 00133 Rome, Italy
| | - P. Ciancaglini
- Chemistry Department, Faculty of Philosophy, Sciences and Letters at Ribeirao Preto, Department of Chemistry, University of Sao Paulo, Avenida Bandeirantes, 3900, Monte Alegre, Ribeirao Preto, SP, Brazil, 14040-901
| | - A.P. Ramos
- Chemistry Department, Faculty of Philosophy, Sciences and Letters at Ribeirao Preto, Department of Chemistry, University of Sao Paulo, Avenida Bandeirantes, 3900, Monte Alegre, Ribeirao Preto, SP, Brazil, 14040-901
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Targosz-Korecka M, Wnętrzak A, Chachaj-Brekiesz A, Gonet-Surówka A, Kubisiak A, Filiczkowska A, Szymoński M, Dynarowicz-Latka P. Effect of selected B-ring-substituted oxysterols on artificial model erythrocyte membrane and isolated red blood cells. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2019; 1862:183067. [PMID: 31634445 DOI: 10.1016/j.bbamem.2019.183067] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 08/19/2019] [Accepted: 09/11/2019] [Indexed: 01/24/2023]
Abstract
In this paper, systematic studies concerning the influence of selected oxysterols on the structure and fluidity of human erythrocyte membrane modeled as Langmuir monolayers have been performed. Three oxidized cholesterol derivatives, namely 7α-hydroxycholesterol (7α-OH) 7β-hydroxycholesterol (7β-OH) and 7-ketocholesterol (7-K) have been incorporated in two different proportions (10 and 50%) into artificial erythrocyte membrane, modeled as two-component (cholesterol:POPC) Langmuir monolayer. All the studied oxysterols were found to alter membrane fluidity and the effect was more pronounced for higher oxysterol content. 7α-OH increased membrane fluidity while opposite effect was observed for 7β-OH and 7-K. Experiments performed on model systems have been verified in biological studies on red blood cells (RBC). Consistent results have been found, i.e. under the influence of 7α-OH, the elasticity of erythrocytes increased, and in the presence of other investigated oxysterols - decreased. The strongest effect was noticed for 7-K. Change of membrane elasticity was associated with the change of erythrocytes shape, being most noticeable under the influence of 7-K.
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Affiliation(s)
- Marta Targosz-Korecka
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, Łojasiewicza 11, 30-348 Kraków, Poland
| | - Anita Wnętrzak
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
| | - Anna Chachaj-Brekiesz
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
| | | | - Agata Kubisiak
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, Łojasiewicza 11, 30-348 Kraków, Poland
| | - Anna Filiczkowska
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, Łojasiewicza 11, 30-348 Kraków, Poland
| | - Marek Szymoński
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, Łojasiewicza 11, 30-348 Kraków, Poland
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Thermodynamic Behaviour of Mixed Films of an Unsaturated and a Saturated Polar Lipid. (Oleic Acid-Stearic Acid and POPC-DPPC). COLLOIDS AND INTERFACES 2018. [DOI: 10.3390/colloids2020017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Applications of Brewster angle microscopy from biological materials to biological systems. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2017; 1859:1749-1766. [PMID: 28655618 DOI: 10.1016/j.bbamem.2017.06.016] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Revised: 06/22/2017] [Accepted: 06/23/2017] [Indexed: 12/22/2022]
Abstract
Brewster angle microscopy (BAM) is a powerful technique that allows for real-time visualization of Langmuir monolayers. The lateral organization of these films can be investigated, including phase separation and the formation of domains, which may be of different sizes and shapes depending on the properties of the monolayer. Different molecules or small changes within a molecule such as the molecule's length or presence of a double bond can alter the monolayer's lateral organization that is usually undetected using surface pressure-area isotherms. The effect of such changes can be clearly observed using BAM in real-time, under full hydration, which is an experimental advantage in many cases. While previous BAM reviews focused more on selected compounds or compared the impact of structural variations on the lateral domain formation, this review provided a broader overview of BAM application using biological materials and systems including the visualization of amphiphilic molecules, proteins, drugs, extracts, DNA, and nanoparticles at the air-water interface.
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Cheng K, Ropers MH, Lopez C. The miscibility of milk sphingomyelin and cholesterol is affected by temperature and surface pressure in mixed Langmuir monolayers. Food Chem 2017; 224:114-123. [DOI: 10.1016/j.foodchem.2016.12.035] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Revised: 11/12/2016] [Accepted: 12/12/2016] [Indexed: 12/30/2022]
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Arczewska M, Czernel G, Gagoś M. Effect of the Amphotericin B and Its Copper Complex on a Model of the Outer Leaflet of Human Erythrocyte Membrane. J Phys Chem B 2016; 120:11191-11204. [DOI: 10.1021/acs.jpcb.6b08555] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Marta Arczewska
- Department
of Biophysics, University of Life Sciences in Lublin, 20-950 Lublin, Poland
| | - Grzegorz Czernel
- Department
of Biophysics, University of Life Sciences in Lublin, 20-950 Lublin, Poland
| | - Mariusz Gagoś
- Department of Cell
Biology, Institute of Biology and Biotechnology, Maria Curie- Skłodowska of University, 20-033 Lublin, Poland
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Hąc-Wydro K, Sroka A, Jabłońska K. The impact of auxins used in assisted phytoextraction of metals from the contaminated environment on the alterations caused by lead(II) ions in the organization of model lipid membranes. Colloids Surf B Biointerfaces 2016; 143:124-130. [PMID: 26998874 DOI: 10.1016/j.colsurfb.2016.03.018] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Revised: 02/11/2016] [Accepted: 03/05/2016] [Indexed: 01/27/2023]
Abstract
Auxins are successfully used to improve phytoextraction efficiency of metal ions from the contaminated environment, however, the mechanism of their activity in this field is not explained. Auxins are known to exert various biochemical alterations in the plant membranes and cells, but their activity involves also direct interactions with lipids leading to changes in membrane organization. Following the suggestion that the auxins-induced modifications in membrane properties alleviate toxic effect of metal ions in this paper we have undertaken the comparative studies on the effect of metal ions and metal ions/auxins mixtures on model membrane systems. The experiments were done on lipid monolayers differing in their composition spread on water subphase and on Pb(2+), Indole-3-acetic acid (IAA), 1-Naphthaleneacetic acid (NAA) and Pb(2+)/IAA and Pb(2+)/NAA water solutions. The analysis of the collected data suggests that metal ions and auxins can change fluidity of the lipid systems and weaken the interactions between monolayer components. This manifested in the increase of the mean area per molecule and the excess area per molecule values for the films on Pb(2+), auxins as well as Pb(2+)/auxin solutions as compared to the values on pure water subphase. However, the presence of auxin in the mixture with lead(II) ions makes the alterations induced by sole metal ions weaker. This effect was more pronounced for the membranes of a higher packing. Thus it was proposed that auxins may enhance phytoextraction of metal ions by weakening their destabilizing effect on membrane.
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Affiliation(s)
- Katarzyna Hąc-Wydro
- Department of Environmental Chemistry, Faculty of Chemistry, Jagiellonian University, Gronostajowa 3, 30-387 Kraków, Poland.
| | - Aleksandra Sroka
- Department of Environmental Chemistry, Faculty of Chemistry, Jagiellonian University, Gronostajowa 3, 30-387 Kraków, Poland
| | - Klaudia Jabłońska
- Department of Environmental Chemistry, Faculty of Chemistry, Jagiellonian University, Gronostajowa 3, 30-387 Kraków, Poland
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Matyszewska D, Brzezińska K, Juhaniewicz J, Bilewicz R. pH dependence of daunorubicin interactions with model DMPC:Cholesterol membranes. Colloids Surf B Biointerfaces 2015. [DOI: 10.1016/j.colsurfb.2015.07.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Murthy AVR, Guyomarc'h F, Paboeuf G, Vié V, Lopez C. Cholesterol strongly affects the organization of lipid monolayers studied as models of the milk fat globule membrane: Condensing effect and change in the lipid domain morphology. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2015; 1848:2308-16. [DOI: 10.1016/j.bbamem.2015.06.014] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Revised: 06/05/2015] [Accepted: 06/13/2015] [Indexed: 11/25/2022]
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