151
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Petit K, Suwalsky M, Colina JR, Contreras D, Aguilar LF, Jemiola-Rzeminska M, Strzalka K. Toxic effects of the anticancer drug epirubicin in vitro assayed in human erythrocytes. Toxicol In Vitro 2020; 68:104964. [PMID: 32800948 DOI: 10.1016/j.tiv.2020.104964] [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: 05/28/2020] [Revised: 07/13/2020] [Accepted: 08/06/2020] [Indexed: 12/16/2022]
Abstract
Epirubicin is a cytotoxic drug used in the treatment of different types of cancer and increasing evidence suggests that its target is cell membranes. In order to gain insight on its toxic effects, intact red blood cells (RBC), human erythrocyte membranes and molecular models were used. The latter consisted in bilayers of dimyristoylphosphatidylcholine (DMPC) and dimyristoylphosphatidylethanolamine (DMPE), phospholipid classes found mainly in the outer and inner monolayers of the human erythrocyte membrane, respectively. The results obtained by X-ray diffraction displayed that epirubicin induced structural perturbations in multilayers of DMPC. Differential scanning calorimetry (DSC) showed that epirubicin disturbed the thermotropic behavior of both DMPC and DMPE vesicles, whereas fluorescence spectroscopy demonstrated alterations in the fluidity of DMPC vesicles and the erythrocyte membrane. Scanning electron microscopy (SEM) revealed that epirubicin changed the normal discoid form of RBC to echinocytes and stomatocytes. Electron paramagnetic resonance (EPR) disclosed that this drug induced conformational changes in the erythrocyte membrane proteins. These findings demonstrate that epirubicin interacts with lipids and proteins of the human erythrocyte membrane, effects that might compromise the integrity and function of cell membranes. This is the first time that its toxic effects on the human erythrocyte membrane have been described.
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Affiliation(s)
- Karla Petit
- Faculty of Chemical Sciences, University of Concepción, Concepción, Chile
| | - Mario Suwalsky
- Faculty of Chemical Sciences, University of Concepción, Concepción, Chile.
| | - José R Colina
- Faculty of Chemical Sciences, University of Concepción, Concepción, Chile
| | - David Contreras
- Faculty of Chemical Sciences, University of Concepción, Concepción, Chile; Center of Biotecnology, University of Concepción, Concepción, Chile
| | - Luis F Aguilar
- Instituto de Química, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Malgorzata Jemiola-Rzeminska
- Malopolska Centre of Biotechnology, Jagiellonian University, Krakow, Poland; Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Kazimierz Strzalka
- Malopolska Centre of Biotechnology, Jagiellonian University, Krakow, Poland; Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
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152
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Ganos C, Aligiannis N, Chinou I, Naziris N, Chountoulesi M, Mroczek T, Graikou K. Rindera graeca (Boraginaceae) Phytochemical Profile and Biological Activities. Molecules 2020; 25:E3625. [PMID: 32784926 PMCID: PMC7464154 DOI: 10.3390/molecules25163625] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 08/05/2020] [Accepted: 08/06/2020] [Indexed: 12/25/2022] Open
Abstract
Rindera graeca is a Greek endemic plant of the Boraginaceae family which has never been studied before. Consequently, this study attempted to phytochemically examine the aerial parts of this species. Nine phenolic secondary metabolites were identified, consisting of seven caffeic acid derivatives and two flavonol glucosides, namely rutin and quercetin-3-rutinoside-7-rhamnoside. These flavonoids, together with rosmarinic acid, were isolated via column chromatography and structurally determined through spectral analysis. Quercetin-3-rutinoside-7-rhamnoside is an unusual triglycoside, which is identified for the first time in Rindera genus and among Boraginaceae plants. This metabolite was further examined with thermal analysis and its 3D structure was simulated, revealing some intriguing information on its interaction with biological membrane models, which might have potential applications in microcirculation-related conditions. R. graeca was also analyzed for its pyrrolizidine alkaloids content, and it was found to contain echinatine together with echinatine N-oxide and rinderine N-oxide. Additionally, the total phenolic and flavonoid contents of R. graeca methanol extract were determined, along with free radical inhibition assays. High total phenolic content and almost complete inhibition at experimental doses at the free radical assays indicate a potent antioxidant profile for this plant. Overall, through phytochemical analysis and biological activity assays, insight was gained on an endemic Greek species of the little-studied Rindera genus, while its potential for further applications has been assessed.
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Affiliation(s)
- Christos Ganos
- Section of Pharmacognosy and Chemistry of Natural Products, Department of Pharmacy, National & Kapodistrian University of Athens, 15771 Zografou, Athens, Greece; (C.G.); (N.A.); (I.C.)
| | - Nektarios Aligiannis
- Section of Pharmacognosy and Chemistry of Natural Products, Department of Pharmacy, National & Kapodistrian University of Athens, 15771 Zografou, Athens, Greece; (C.G.); (N.A.); (I.C.)
| | - Ioanna Chinou
- Section of Pharmacognosy and Chemistry of Natural Products, Department of Pharmacy, National & Kapodistrian University of Athens, 15771 Zografou, Athens, Greece; (C.G.); (N.A.); (I.C.)
| | - Nikolaos Naziris
- Section of Pharmaceutical Technology, Department of Pharmacy, National & Kapodistrian University of Athens, 15771 Zografou, Athens, Greece; (N.N.); (M.C.)
| | - Maria Chountoulesi
- Section of Pharmaceutical Technology, Department of Pharmacy, National & Kapodistrian University of Athens, 15771 Zografou, Athens, Greece; (N.N.); (M.C.)
| | - Tomasz Mroczek
- Department of Pharmacognosy with Medicinal Plant Laboratory Unit, Medical University, ul. Chodźki 19, 20-093 Lublin, Poland;
| | - Konstantia Graikou
- Section of Pharmacognosy and Chemistry of Natural Products, Department of Pharmacy, National & Kapodistrian University of Athens, 15771 Zografou, Athens, Greece; (C.G.); (N.A.); (I.C.)
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153
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Zakharova AA, Efimova SS, Yuskovets VN, Yakovlev IP, Sarkisyan ZM, Ostroumova OS. 1,3-Thiazine, 1,2,3,4-Dithiadiazole, and Thiohydrazide Derivatives Affect Lipid Bilayer Properties and Ion-Permeable Pores Induced by Antifungals. Front Cell Dev Biol 2020; 8:535. [PMID: 32695784 PMCID: PMC7339130 DOI: 10.3389/fcell.2020.00535] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Accepted: 06/08/2020] [Indexed: 12/02/2022] Open
Abstract
Over the past decade, thiazines, thiadiazoles, and thiohydrazides have attracted increasing attention due to their sedative, antimicrobial, antiviral, antifungal, and antitumor activities. The clinical efficacy of such drugs, as well as the possibility of developing resistance to antimicrobials, will depend on addressing a number of fundamental problems, including the role of membrane lipids during their interaction with plasma membranes. The effects of the eight 1,3- thiazine-, 1,2,3,4- dithiadiazole-, and thiohydrazide-related compounds on the physical properties of model lipid membranes and the effects on reconstituted ion channels induced by the polyene macrolide antimycotic nystatin and antifungal cyclic lipopeptides syringomycin E and fengycin were observed. We found that among the tested agents, the fluorine-containing compound N′-(3,5-difluorophenyl)-benzenecarbothiohydrazide (C6) was the most effective at increasing the electric barrier for anion permeation into the hydrophobic region of the membrane and reducing the conductance of anion-permeable syringomycin pores. A decrease in the membrane boundary potential with C6 adsorption also facilitated the immersion of positively charged syringomycin molecules into the lipid bilayer and increases the pore-forming ability of the lipopeptide. Using differential scanning microcalorimetry, we showed that C6 led to disordering of membrane lipids, possibly by potentiating positive curvature stress. Therefore, we used C6 as an agonist of antifungals forming the pores that are sensitive to membrane curvature stress and lipid packing, i.e., nystatin and fengycin. The dramatic increase in transmembrane current induced by syringomycin E, nystatin, and fengycin upon C6 treatment suggests its potential in combination therapy for treating invasive fungal infections.
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Affiliation(s)
- Anastasiia A Zakharova
- Laboratory of Membrane and Ion Channel Modeling, Institute of Cytology, Russian Academy of Sciences, Saint Petersburg, Russia
| | - Svetlana S Efimova
- Laboratory of Membrane and Ion Channel Modeling, Institute of Cytology, Russian Academy of Sciences, Saint Petersburg, Russia
| | - Valeriy N Yuskovets
- Department of Organic Chemistry, Saint-Petersburg State Chemical Pharmaceutical University, Saint Petersburg, Russia
| | - Igor P Yakovlev
- Department of Organic Chemistry, Saint-Petersburg State Chemical Pharmaceutical University, Saint Petersburg, Russia
| | - Zara M Sarkisyan
- Department of General and Medical Chemistry, Saint-Petersburg State Pediatric Medical University, Saint Petersburg, Russia
| | - Olga S Ostroumova
- Laboratory of Membrane and Ion Channel Modeling, Institute of Cytology, Russian Academy of Sciences, Saint Petersburg, Russia
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154
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Induction of Ordered Lipid Raft Domain Formation by Loss of Lipid Asymmetry. Biophys J 2020; 119:483-492. [PMID: 32710822 DOI: 10.1016/j.bpj.2020.06.030] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 06/09/2020] [Accepted: 06/29/2020] [Indexed: 01/22/2023] Open
Abstract
How lipid asymmetry impacts ordered lipid domain (raft) formation may yield important clues to how ordered domain formation is regulated in vivo. Under some conditions, a sphingomyelin (SM) and cholesterol-rich ordered domain in one leaflet induces ordered domain formation in the corresponding region of an opposite leaflet composed of unsaturated phosphatidylcholine (PC) and cholesterol. In other conditions, the formation of ordered domains in a SM and cholesterol-rich leaflet can be suppressed by an opposite leaflet containing unsaturated PC and cholesterol. To explore how PC unsaturation influences the balance between these behaviors, domain formation was studied in asymmetric and symmetric lipid vesicles composed of egg SM, cholesterol, and either unsaturated dioleoyl PC (DOPC) or 1-palmitoyl 2-oleoyl PC (POPC). The temperature dependence of ordered domain formation was measured using Förster resonance energy transfer, which detects nanodomains as well as large domains. In cholesterol-containing asymmetric SM+PC outside/PC inside vesicles, the PC-containing inner leaflet tended to destabilize ordered domain formation in the SM+PC-containing outer leaflet relative to ordered domain stability in cholesterol-containing symmetric SM/PC vesicles. Residual ordered domain formation was detected in cholesterol-containing asymmetric SM+DOPC outside/DOPC inside vesicles, but ordered domain formation was completely or almost completely suppressed by asymmetry in cholesterol-containing SM+POPC outside/POPC inside vesicles over the entire temperature range measured. Suppression of ordered domain formation in the latter vesicles was confirmed by fluorescence anisotropy measurements. Because mixtures of SM, POPC, and cholesterol form domains in symmetric vesicles, and this lipid composition mimics plasma membranes to a significant degree, it is possible that under some conditions in vivo the loss of lipid asymmetry could trigger ordered domain formation.
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155
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Zare M, Kitt JP, Harris JM. Hybrid-Supported Bilayers Formed with Mixed-Charge Surfactants on C 18-Functionalized Silica Surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:7609-7618. [PMID: 32503363 DOI: 10.1021/acs.langmuir.0c01210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Mixtures of cationic-anionic surfactants have been shown to spontaneously form ordered monolayers at hydrophobic-hydrophilic boundaries, including air-water and oil-water interfaces. In this work, confocal Raman microscopy is used to investigate the structure of hybrid-supported surfactant bilayers (HSSBs) formed by deposition of a distal leaflet of mixed cationic-anionic surfactants onto a proximal leaflet of n-alkane (C18) chains on the interior surfaces of chromatographic silica particles. The surface coverage of the two surfactants in a hybrid bilayer was determined from carbon analysis and the relative Raman scattering of their respective head-groups. Within the measurement uncertainty, the stoichiometric ratio of the two surfactants is one-to-one, equivalent to mixed-charge-surfactant monolayers at air-water and oil-water interfaces and consistent with the role of the head-group electrostatic interactions in their formation. When self-assembled on the hydrophobic surface, pairs of oppositely charged n-alkyl chain surfactants resemble a phospholipid (phosphatidylcholine) molecule, with its zwitterionic head-group and two hydrophobic acyl chain tails. Indeed, the structure of these hybrid-supported surfactant bilayers on C18-modified silica surfaces is similar to that of hybrid-supported lipid bilayers (HSLBs) on the same supports, but with denser and more-ordered n-alkyl chains. Hybrid-supported surfactant bilayers exhibit a melting phase transition (gel to liquid-crystalline phase) with structural and energetic characteristics similar to those of hybrid-supported bilayers prepared from a zwitterionic phospholipid of the same alkyl chain length. These mixed-charge surfactants on n-alkane-modified silica are stable in water over time (months), results that suggest the potential use of these hybrid bilayers for generating supported lipid-bilayer-like surfaces or for separation applications.
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Affiliation(s)
- Maryam Zare
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-0850 United States
| | - Jay P Kitt
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-0850 United States
| | - Joel M Harris
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-0850 United States
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156
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Yano Y, Hanashima S, Tsuchikawa H, Yasuda T, Slotte JP, London E, Murata M. Sphingomyelins and ent-Sphingomyelins Form Homophilic Nano-Subdomains within Liquid Ordered Domains. Biophys J 2020; 119:539-552. [PMID: 32710823 PMCID: PMC7399500 DOI: 10.1016/j.bpj.2020.06.028] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 06/19/2020] [Accepted: 06/26/2020] [Indexed: 12/29/2022] Open
Abstract
Sphingomyelin (SM), a major component of small domains (or lipid rafts) in mammalian cell membranes, forms a liquid-ordered phase in the presence of cholesterol (Cho). However, the nature of molecular interactions within the ordered SM/Cho phase remains elusive. We previously revealed that stearoyl-SM (SSM) and its enantiomer (ent-SSM) separately form nano-subdomains within the liquid-ordered phase involving homophilic SSM-SSM and ent-SSM-ent-SSM interactions. In this study, the details of the subdomain formation by SSMs at the nanometer range were examined using Förster resonance energy transfer (FRET) measurements in lipid bilayers containing SSM and ent-SSM, dioleoyl-phosphatidylcholine and Cho. Although microscopy detected a stereochemical effect on partition coefficient favoring stereochemically homophilic interactions in the liquid-ordered state, it showed no significant difference in large-scale liquid-ordered domain formation by the two stereoisomers. In contrast to the uniform domains seen microscopy, FRET analysis using fluorescent donor- and acceptor-labeled SSM showed distinct differences in SM and ent-SM colocalization within nanoscale distances. Donor- and acceptor-labeled SSM showed significantly higher FRET efficiency than did donor-labeled SSM and acceptor-labeled ent-SSM in lipid vesicles composed of “racemic” (1:1) mixtures of SSM/ent-SSM with dioleoylphosphatidylcholine and Cho. The difference in FRET efficiency indicated that SSM and ent-SSM assemble to form separate nano-subdomains. The average size of the subdomains decreased as temperature increased, and at physiological temperatures, the subdomains were found to have a single-digit nanometer radius. These results suggest that (even in the absence of ent-SM) SM-SM interactions play a crucial role in forming nano-subdomains within liquid-ordered domains and may be a key feature of lipid microdomains (or rafts) in biological membranes.
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Affiliation(s)
- Yo Yano
- Department of Chemistry, Graduate School of Science, Osaka University, Osaka, Japan; ERATO, Lipid Active Structure Project, Japan Science and Technology Agency, Graduate School of Science, Osaka University, Osaka, Japan
| | - Shinya Hanashima
- Department of Chemistry, Graduate School of Science, Osaka University, Osaka, Japan
| | - Hiroshi Tsuchikawa
- Department of Chemistry, Graduate School of Science, Osaka University, Osaka, Japan
| | - Tomokazu Yasuda
- Department of Chemistry, Graduate School of Science, Osaka University, Osaka, Japan
| | - J Peter Slotte
- Biochemistry, Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland
| | - Erwin London
- Department of Biochemistry and Cell Biology, Stony Brook University, Stony Brook, New York.
| | - Michio Murata
- Department of Chemistry, Graduate School of Science, Osaka University, Osaka, Japan; ERATO, Lipid Active Structure Project, Japan Science and Technology Agency, Graduate School of Science, Osaka University, Osaka, Japan.
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157
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Buslaev P, Mustafin K, Gushchin I. Principal component analysis highlights the influence of temperature, curvature and cholesterol on conformational dynamics of lipids. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2020; 1862:183253. [PMID: 32142820 DOI: 10.1016/j.bbamem.2020.183253] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 02/14/2020] [Accepted: 02/27/2020] [Indexed: 01/06/2023]
Abstract
Membrane lipids are inherently highly dynamic molecules. Currently, it is difficult to probe the structures of individual lipids experimentally at the timescales corresponding to atomic motions, and consequently molecular dynamics simulations are used widely. In our previous work, we have introduced the principal component analysis (PCA) as a convenient framework for comprehensive quantitative description of lipid motions. Here, we present a newly developed open source script, PCAlipids, which automates the analysis and allows us to refine the approach and test its limitations. We use PCAlipids to determine the influence of temperature, cholesterol and curvature on individual lipids, and show that the most prominent lipid tail scissoring motion is strongly affected by these factors and allows tracking of phase transition. Addition of cholesterol affects the conformations and selectively changes the dynamics of lipid molecules, impacting the large-amplitude motions. Introduction of curvature biases the conformational ensembles towards more extended structures. We hope that the developed approach will be useful for understanding the molecular basis of different processes occurring in lipid membrane systems and will stimulate development of complementary experimental techniques probing the conformations of individual lipid molecules.
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Affiliation(s)
- P Buslaev
- Moscow Institute of Physics and Technology, Dolgoprudny, Russia.
| | - K Mustafin
- Moscow Institute of Physics and Technology, Dolgoprudny, Russia
| | - I Gushchin
- Moscow Institute of Physics and Technology, Dolgoprudny, Russia.
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158
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Ghosh U, Weliky DP. 2H nuclear magnetic resonance spectroscopy supports larger amplitude fast motion and interference with lipid chain ordering for membrane that contains β sheet human immunodeficiency virus gp41 fusion peptide or helical hairpin influenza virus hemagglutinin fusion peptide at fusogenic pH. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2020; 1862:183404. [PMID: 32585207 DOI: 10.1016/j.bbamem.2020.183404] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 04/27/2020] [Accepted: 06/19/2020] [Indexed: 01/02/2023]
Abstract
Enveloped viruses are surrounded by a membrane which is obtained from an infected host cell during budding. Infection of a new cell requires joining (fusion) of the virus and cell membranes. This process is mediated by a monotopic viral fusion protein with a large ectodomain outside the virus. The ectodomains of class I enveloped viruses have a N-terminal "fusion peptide" (fp) domain that is critical for fusion and binds to the cell membrane. In this study, 2H NMR spectra are analyzed for deuterated membrane with fp from either HIV gp41 (GP) or influenza hemagglutinin (HA) fusion proteins. In addition, the HAfp samples are studied at more fusogenic pH 5 and less fusogenic pH 7. GPfp adopts intermolecular antiparallel β sheet structure whereas HAfp is a monomeric helical hairpin. The data are obtained for a set of temperatures between 35 and 0 °C using DMPC-d54 lipid with perdeuterated acyl chains. The DMPC has liquid-crystalline (Lα) phase with disordered chains at higher temperature and rippled gel (Pβ') or gel phase (Lβ') with ordered chains at lower temperature. At given temperature T, the no peptide and HAfp, pH 7 samples exhibit similar spectral lineshapes. Spectral broadening with reduced temperature correlates with the transition from Lα to Pβ' and then Lβ' phases. At given T, the lineshapes are narrower for HAfp, pH 5 vs. no peptide and HAfp, pH 7 samples, and even narrower for the GPfp sample. These data support larger-amplitude fast (>105 Hz) lipid acyl chain motion for samples with fusogenic peptides, and peptide interference with chain ordering. The NMR data of the present paper correlate with insertion of these peptides into the hydrocarbon core of the membrane and support a significant fusion contribution from the resultant lipid acyl chain disorder, perhaps because of reduced barriers between the different membrane topologies in the fusion pathway. Membrane insertion and lipid perturbation appear common to both β sheet and helical hairpin peptides.
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Affiliation(s)
- Ujjayini Ghosh
- Department of Chemistry, Michigan State University, East Lansing, MI 48824, USA
| | - David P Weliky
- Department of Chemistry, Michigan State University, East Lansing, MI 48824, USA.
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159
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Jirasko V, Lakomek N, Penzel S, Fogeron M, Bartenschlager R, Meier BH, Böckmann A. Proton-Detected Solid-State NMR of the Cell-Free Synthesized α-Helical Transmembrane Protein NS4B from Hepatitis C Virus. Chembiochem 2020; 21:1453-1460. [PMID: 31850615 PMCID: PMC7318649 DOI: 10.1002/cbic.201900765] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Indexed: 01/01/2023]
Abstract
Proton-detected 100 kHz magic-angle-spinning (MAS) solid-state NMR is an emerging analysis method for proteins with only hundreds of microgram quantities, and thus allows structural investigation of eukaryotic membrane proteins. This is the case for the cell-free synthesized hepatitis C virus (HCV) nonstructural membrane protein 4B (NS4B). We demonstrate NS4B sample optimization using fast reconstitution schemes that enable lipid-environment screening directly by NMR. 2D spectra and relaxation properties guide the choice of the best sample preparation to record 2D 1 H-detected 1 H,15 N and 3D 1 H,13 C,15 N correlation experiments with linewidths and sensitivity suitable to initiate sequential assignments. Amino-acid-selectively labeled NS4B can be readily obtained using cell-free synthesis, opening the door to combinatorial labeling approaches which should enable structural studies.
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Affiliation(s)
- Vlastimil Jirasko
- ETH ZürichPhysical ChemistryVladimir-Prelog Weg 28093ZürichSwitzerland
| | | | - Susanne Penzel
- ETH ZürichPhysical ChemistryVladimir-Prelog Weg 28093ZürichSwitzerland
| | - Marie‐Laure Fogeron
- Institut de Biologie et Chimie des ProteinesMMSBLabex EcofectUMR 5086 CNRSUniversité de Lyon7 passage du Vercors69367LyonFrance
| | - Ralf Bartenschlager
- Department of Infectious DiseasesMolecular VirologyHeidelberg UniversityIm Neuenheimer Feld 34569120HeidelbergGermany
- Division of Virus-Associated Carcinogenesis (Germany)Cancer Research Center (DKFZ)Im Neuenheimer Feld 24269120HeidelbergGermany
| | - Beat H. Meier
- ETH ZürichPhysical ChemistryVladimir-Prelog Weg 28093ZürichSwitzerland
| | - Anja Böckmann
- Institut de Biologie et Chimie des ProteinesMMSBLabex EcofectUMR 5086 CNRSUniversité de Lyon7 passage du Vercors69367LyonFrance
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160
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Matsuki H, Goto M, Motohashi M, Kiguchi A, Nakao T, Tamai N. Formation of intermediate gel-liquid crystalline phase on medium-chain phosphatidylcholine bilayers: Phase transitions depending on the bilayer packing. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2020; 1862:183197. [PMID: 31958435 DOI: 10.1016/j.bbamem.2020.183197] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 12/27/2019] [Accepted: 01/15/2020] [Indexed: 11/28/2022]
Abstract
The bilayer phase transitions of medium-chain phosphatidylcholines with linear saturated acyl chains (Cn = 12, 13 and 14) were measured by high-pressure light-transmittance measurements and differential scanning calorimetry to investigate the formation of intermediate gel-liquid crystalline phase called Lx phase. The constructed phase diagrams showed that there existed a distinct region of the Lx phase between ripple gel (Pβ') and liquid crystalline (Lα) phase for multilamellar vesicle bilayers of C12PC and C13PC. The Lx phase of the C12PC bilayer was metastable at all pressures and disappeared at a higher pressure. In the C13PC bilayer, the Lx phase was stable and also disappeared at a higher pressure but its region markedly shrunk. By contrast, the Lx phase was not detected for the C14PC bilayer. Effects of other factors such as vesicle size and solvent substitution on the Lx phase of the C13PC bilayer were also examined. A decrease in vesicle size and solvent substitution from water to 50 wt% ethylene glycol solution promoted the Lx-phase formation as opposed to the effects of acyl-chain elongation and pressurization. The fluorescence data of the C13PC bilayer with different vesicle sizes showed that the Lx phase is caused by the difference of local packing in the bilayer. Considering these facts, we concluded that the Lx phase is an intermediate gel-Lα phase that has gel-phase monolayers with negative curvature and Lα-phase monolayers with positive curvature. The formation mechanism of the Lx-phase in stacked bilayers and dispersed vesicles is also explainable by this difference in packing state.
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Affiliation(s)
- Hitoshi Matsuki
- Department of Bioengineering, Division of Bioscience and Bioindustry, Graduate School of Technology, Industrial and Social Sciences, Tokushima University, 2-1 Minamijosanjima-cho, Tokushima 770-8513, Japan.
| | - Masaki Goto
- Department of Bioengineering, Division of Bioscience and Bioindustry, Graduate School of Technology, Industrial and Social Sciences, Tokushima University, 2-1 Minamijosanjima-cho, Tokushima 770-8513, Japan
| | - Makiko Motohashi
- Department of Biological Science and Technology, Faculty of Engineering, Tokushima University, 2-1 Minamijosanjima-cho, Tokushima 770-8506, Japan
| | - Aoi Kiguchi
- Department of Biological Science and Technology, Faculty of Engineering, Tokushima University, 2-1 Minamijosanjima-cho, Tokushima 770-8506, Japan
| | - Toshiki Nakao
- Department of Biological Science and Technology, Faculty of Engineering, Tokushima University, 2-1 Minamijosanjima-cho, Tokushima 770-8506, Japan
| | - Nobutake Tamai
- Department of Bioengineering, Division of Bioscience and Bioindustry, Graduate School of Technology, Industrial and Social Sciences, Tokushima University, 2-1 Minamijosanjima-cho, Tokushima 770-8513, Japan
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161
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Bryce DA, Kitt JP, Myres GJ, Harris JM. Confocal Raman Microscopy Investigation of Phospholipid Monolayers Deposited on Nitrile-Modified Surfaces in Porous Silica Particles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:4071-4079. [PMID: 32212663 DOI: 10.1021/acs.langmuir.0c00456] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Phospholipid bilayers deposited on a variety of surfaces provide models for investigation of the lipid membrane structure and supports for biocompatible sensors. Hybrid-supported phospholipid bilayers (HSLBs) are stable membrane models for these investigations, typically prepared by self-assembly of a lipid monolayer over an n-alkane-modified surface. HSLBs have been prepared on n-alkyl chain-modified silica and used for lipophilicity-based chromatographic separations. The structure of these hybrid bilayers differs from vesicle membranes where the lipid head group spacing is greater due to interdigitation of the lipid acyl chains with the underlying n-alkyl chains bound to the silica surface. This interdigitated structure exhibits a broader melting transition at a higher temperature due to strong interactions between the lipid acyl chains and the immobile n-alkyl chains bound to silica. In the present work, we seek to reduce the interactions between a lipid monolayer and its supporting substrate by self-assembly of 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC) on porous silica functionalized with nitrile-terminated surface ligands. The frequency of Raman scattering of the surface -C≡N stretching mode at the lipid-nitrile interface is consistent with an n-alkane-like environment and insensitive to lipid head group charge, indicating that the lipid acyl chains are in contact with the surface nitrile groups. The head group area of this lipid monolayer was determined from the within-particle phospholipid concentration and silica specific surface area and found to be 54 ± 2 Å2, equivalent to the head group area of a DMPC vesicle bilayer. The structure of these nitrile-supported phospholipid monolayers was characterized below and above their melting transition by confocal Raman microscopy and found to be nearly identical to DMPC vesicle bilayers. Their narrow gel-to-fluid-phase melting transition is equivalent to dispersed DMPC vesicles, suggesting that the acyl chain structure on the nitrile support mimics the outer leaflet structure of a vesicle membrane.
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Affiliation(s)
- David A Bryce
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-0850, United States
| | - Jay P Kitt
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-0850, United States
| | - Grant J Myres
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-0850, United States
| | - Joel M Harris
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-0850, United States
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162
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Mehta PP, Ghoshal D, Pawar AP, Kadam SS, Dhapte-Pawar VS. Recent advances in inhalable liposomes for treatment of pulmonary diseases: Concept to clinical stance. J Drug Deliv Sci Technol 2020. [DOI: 10.1016/j.jddst.2020.101509] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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163
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Strandberg E, Bentz D, Wadhwani P, Bürck J, Ulrich AS. Terminal charges modulate the pore forming activity of cationic amphipathic helices. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2020; 1862:183243. [DOI: 10.1016/j.bbamem.2020.183243] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 01/14/2020] [Accepted: 02/18/2020] [Indexed: 11/15/2022]
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164
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Bannigan P, Flynn J, Hudson SP. The impact of endogenous gastrointestinal molecules on the dissolution and precipitation of orally delivered hydrophobic APIs. Expert Opin Drug Deliv 2020; 17:677-688. [DOI: 10.1080/17425247.2020.1743677] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Pauric Bannigan
- Department of Chemical Sciences, SSPC the SFI Pharmaceutical Centre, Bernal Institute, University of Limerick, Limerick, Ireland
| | - James Flynn
- Department of Chemical Sciences, SSPC the SFI Pharmaceutical Centre, Bernal Institute, University of Limerick, Limerick, Ireland
| | - Sarah P. Hudson
- Department of Chemical Sciences, SSPC the SFI Pharmaceutical Centre, Bernal Institute, University of Limerick, Limerick, Ireland
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165
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Khan S, McCabe J, Hill K, Beales PA. Biodegradable hybrid block copolymer – lipid vesicles as potential drug delivery systems. J Colloid Interface Sci 2020; 562:418-428. [DOI: 10.1016/j.jcis.2019.11.101] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2019] [Revised: 11/12/2019] [Accepted: 11/23/2019] [Indexed: 11/16/2022]
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166
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Pereira-Leite C, Jamal SK, Almeida JP, Coutinho A, Prieto M, Cuccovia IM, Nunes C, Reis S. Neutral Diclofenac Causes Remarkable Changes in Phosphatidylcholine Bilayers: Relevance for Gastric Toxicity Mechanisms. Mol Pharmacol 2020; 97:295-303. [DOI: 10.1124/mol.119.118299] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Accepted: 01/24/2020] [Indexed: 12/13/2022] Open
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167
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Jakubec M, Totland C, Rise F, Chamgordani EJ, Paulsen B, Maes L, Matheeussen A, Gundersen LL, Halskau Ø. Bioactive Metabolites of Marine Origin Have Unusual Effects on Model Membrane Systems. Mar Drugs 2020; 18:md18020125. [PMID: 32092956 PMCID: PMC7073740 DOI: 10.3390/md18020125] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 02/04/2020] [Accepted: 02/12/2020] [Indexed: 02/06/2023] Open
Abstract
Marine sponges and soft corals have yielded novel compounds with antineoplastic and antimicrobial activities. Their mechanisms of action are poorly understood, and in most cases, little relevant experimental evidence is available on this topic. In the present study, we investigated whether agelasine D (compound 1) and three agelasine analogs (compound 2–4) as well as malonganenone J (compound 5), affect the physical properties of a simple lipid model system, consisting of dioleoylphospahtidylcholine and dioleoylphosphatidylethanolamine. The data indicated that all the tested compounds increased stored curvature elastic stress, and therefore, tend to deform the bilayer which occurs without a reduction in the packing stress of the hexagonal phase. Furthermore, lower concentrations (1%) appear to have a more pronounced effect than higher ones (5–10%). For compounds 4 and 5, this effect is also reflected in phospholipid headgroup mobility assessed using 31P chemical shift anisotropy (CSA) values of the lamellar phases. Among the compounds tested, compound 4 stands out with respect to its effects on the membrane model systems, which matches its efficacy against a broad spectrum of pathogens. Future work that aims to increase the pharmacological usefulness of these compounds could benefit from taking into account the compound effects on the fluid lamellar phase at low concentrations.
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Affiliation(s)
- Martin Jakubec
- Department of Biological Sciences, University of Bergen, Thormøhlensgate 55, NO-5006 Bergen, Norway;
| | - Christian Totland
- Department of Environmental Chemistry, Norwegian Geotechnical Institute, Sognsveien 72, 0855 Oslo, Norway;
| | - Frode Rise
- Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, NO-0315 Oslo, Norway; (F.R.); (E.J.C.); (B.P.)
| | - Elahe Jafari Chamgordani
- Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, NO-0315 Oslo, Norway; (F.R.); (E.J.C.); (B.P.)
| | - Britt Paulsen
- Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, NO-0315 Oslo, Norway; (F.R.); (E.J.C.); (B.P.)
| | - Louis Maes
- University of Antwerp, Laboratory of Microbiology, Parasitology and Hygiene, Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, Universiteitsplein 1, B-2610 Antwerp, Belgium; (L.M.); (A.M.)
| | - An Matheeussen
- University of Antwerp, Laboratory of Microbiology, Parasitology and Hygiene, Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, Universiteitsplein 1, B-2610 Antwerp, Belgium; (L.M.); (A.M.)
| | - Lise-Lotte Gundersen
- Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, NO-0315 Oslo, Norway; (F.R.); (E.J.C.); (B.P.)
- Correspondence: (L.-L.G.); (Ø.H.)
| | - Øyvind Halskau
- Department of Biological Sciences, University of Bergen, Thormøhlensgate 55, NO-5006 Bergen, Norway;
- Correspondence: (L.-L.G.); (Ø.H.)
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168
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Tarone AG, Cazarin CBB, Marostica Junior MR. Anthocyanins: New techniques and challenges in microencapsulation. Food Res Int 2020; 133:109092. [PMID: 32466932 DOI: 10.1016/j.foodres.2020.109092] [Citation(s) in RCA: 91] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 02/05/2020] [Accepted: 02/09/2020] [Indexed: 12/31/2022]
Abstract
Anthocyanins are a bioactive compound belonging to the flavonoid classthatis present in human nutrition through plant-based foods. Due to their antioxidant properties, several health benefits related to their consumption are reported in the literature. The stability of the color and the properties of anthocyanins is strongly affected by pH, solvent, temperature, and other environmental conditions. In addition, the insufficient residence time of anthocyanins in the upper digestive tract causes apartialabsorption, which needs to be improved. These factshave led researchers to investigate new forms of processing that provide minimal degradation. Microencapsulation is a promising possibility to stabilize anthocyanin extracts and allow their addition to food products in a more stable form. The microcapsules can still provide a prolonged gastrointestinal retention time caused by the improvement of the bioadhesive properties in the mucus covering the intestinal epithelium. Although there are efficient and emerging techniques, anthocyanins microencapsulation is still a challenge for the food industry. The purpose of this work is to provide an overview of anthocyanins structure, absorptionand protection, and to show the main conventional and emerging microencapsulation methods and their pros and cons.
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Affiliation(s)
- Adriana Gadioli Tarone
- School of Food Engineering, University of Campinas - UNICAMP, 13083-862 Campinas, SP, Brazil
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169
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Ballweg S, Sezgin E, Doktorova M, Covino R, Reinhard J, Wunnicke D, Hänelt I, Levental I, Hummer G, Ernst R. Regulation of lipid saturation without sensing membrane fluidity. Nat Commun 2020; 11:756. [PMID: 32029718 PMCID: PMC7005026 DOI: 10.1038/s41467-020-14528-1] [Citation(s) in RCA: 86] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Accepted: 01/14/2020] [Indexed: 12/22/2022] Open
Abstract
Cells maintain membrane fluidity by regulating lipid saturation, but the molecular mechanisms of this homeoviscous adaptation remain poorly understood. We have reconstituted the core machinery for regulating lipid saturation in baker’s yeast to study its molecular mechanism. By combining molecular dynamics simulations with experiments, we uncover a remarkable sensitivity of the transcriptional regulator Mga2 to the abundance, position, and configuration of double bonds in lipid acyl chains, and provide insights into the molecular rules of membrane adaptation. Our data challenge the prevailing hypothesis that membrane fluidity serves as the measured variable for regulating lipid saturation. Rather, we show that Mga2 senses the molecular lipid-packing density in a defined region of the membrane. Our findings suggest that membrane property sensors have evolved remarkable sensitivities to highly specific aspects of membrane structure and dynamics, thus paving the way toward the development of genetically encoded reporters for such properties in the future. Cells maintain membrane fluidity by regulating lipid saturation, but the molecular mechanisms of this homeoviscous adaptation remain poorly understood. Here authors reconstituted the core machinery for regulating lipid saturation in baker’s yeast to directly characterize its response to defined membrane environments and uncover its mode-of-action.
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Affiliation(s)
- Stephanie Ballweg
- Medical Biochemistry and Molecular Biology, Medical Faculty, Saarland University, Kirrberger Strasse 100, Building 61.4, 66421, Homburg, Germany.,PZMS, Center for Molecular Signaling (PZMS), Medical Faculty, Saarland University, 66421, Homburg, Germany
| | - Erdinc Sezgin
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - Milka Doktorova
- Department of Integrative Biology and Pharmacology, McGovern Medical School at the University of Texas Health Science Center, Houston, Texas, USA
| | - Roberto Covino
- Department of Theoretical Biophysics, Max Planck Institute of Biophysics, Max-von-Laue-Strasse 3, 60438, Frankfurt, Germany
| | - John Reinhard
- Medical Biochemistry and Molecular Biology, Medical Faculty, Saarland University, Kirrberger Strasse 100, Building 61.4, 66421, Homburg, Germany.,PZMS, Center for Molecular Signaling (PZMS), Medical Faculty, Saarland University, 66421, Homburg, Germany
| | - Dorith Wunnicke
- Institute of Biochemistry, Goethe University Frankfurt, Max-von-Laue-Strasse 9, 60438, Frankfurt, Germany
| | - Inga Hänelt
- Institute of Biochemistry, Goethe University Frankfurt, Max-von-Laue-Strasse 9, 60438, Frankfurt, Germany
| | - Ilya Levental
- Department of Integrative Biology and Pharmacology, McGovern Medical School at the University of Texas Health Science Center, Houston, Texas, USA
| | - Gerhard Hummer
- Department of Theoretical Biophysics, Max Planck Institute of Biophysics, Max-von-Laue-Strasse 3, 60438, Frankfurt, Germany.,Institute of Biophysics, Goethe University Frankfurt, 60438, Frankfurt, Germany
| | - Robert Ernst
- Medical Biochemistry and Molecular Biology, Medical Faculty, Saarland University, Kirrberger Strasse 100, Building 61.4, 66421, Homburg, Germany. .,PZMS, Center for Molecular Signaling (PZMS), Medical Faculty, Saarland University, 66421, Homburg, Germany.
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170
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Deplazes E, Sarrami F, Poger D. Effect of H3O+ on the Structure and Dynamics of Water at the Interface with Phospholipid Bilayers. J Phys Chem B 2020; 124:1361-1373. [DOI: 10.1021/acs.jpcb.9b10169] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Evelyne Deplazes
- School of Life Sciences, University of Technology Sydney, Ultimo, New South Wales 2007, Australia
- School of Pharmacy and Biomedical Sciences, Curtin Institute for Computation, Curtin University, Perth, Western Australia 6845, Australia
| | - Farzaneh Sarrami
- School of Chemistry and Biochemistry, The University of Western Australia, Perth, Western Australia 6009, Australia
| | - David Poger
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Queensland 4072, Australia
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171
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Eleftheriou K, Kaminari A, Panagiotaki KN, Sideratou Z, Zachariadis M, Anastassopoulou J, Tsiourvas D. A combination drug delivery system employing thermosensitive liposomes for enhanced cell penetration and improved in vitro efficacy. Int J Pharm 2020; 574:118912. [PMID: 31809858 DOI: 10.1016/j.ijpharm.2019.118912] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 11/15/2019] [Accepted: 11/27/2019] [Indexed: 02/06/2023]
Abstract
Drug-loaded thermosensitive liposomes are investigated as drug delivery systems in combination with local mild hyperthermia therapy due to their capacity to release their cargo at a specific temperature range (40-42 °C). Additional benefit can be achieved by the development of such systems that combine two different anticancer drugs, have cell penetration properties and, when heated, release their drug payload in a controlled fashion. To this end, liposomes were developed incorporating at low concentration (5 mol%) a number of monoalkylether phosphatidylcholine lipids, encompassing the platelet activating factor, PAF, and its analogues that induce thermoresponsiveness and have anticancer biological activity. These thermoresponsive liposomes were efficiently (>90%) loaded with doxorubicin (DOX), and their thermal properties, stability and drug release were investigated both at 37 ◦C and at elevated temperatures. In vitro studies of the most advantageous liposomal formulation containing the methylated PAF derivative (methyl-PAF, edelfosine), an established antitumor agent, were performed on human prostate cancer cell lines. This system exhibits controlled release of DOX at 40-42 °C, enhanced cell uptake due to the presence of methyl-PAF, and improved cell viability inhibition due to the combined action of both medications.
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Affiliation(s)
- Kleopatra Eleftheriou
- Institute of Nanoscience and Nanotechnology, NCSR ''Demokritos", 15310 Aghia Paraskevi, Greece
| | - Archontia Kaminari
- Institute of Nanoscience and Nanotechnology, NCSR ''Demokritos", 15310 Aghia Paraskevi, Greece
| | - Katerina N Panagiotaki
- Institute of Nanoscience and Nanotechnology, NCSR ''Demokritos", 15310 Aghia Paraskevi, Greece
| | - Zili Sideratou
- Institute of Nanoscience and Nanotechnology, NCSR ''Demokritos", 15310 Aghia Paraskevi, Greece
| | - Michael Zachariadis
- Institute of Biosciences and Applications, NCSR ''Demokritos", 15310 Aghia Paraskevi, Greece
| | - Jane Anastassopoulou
- Radiation Chemistry and Biospectroscopy, School of Chemical Engineering, National Technical University of Athens, Athens, Greece
| | - Dimitris Tsiourvas
- Institute of Nanoscience and Nanotechnology, NCSR ''Demokritos", 15310 Aghia Paraskevi, Greece.
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172
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Gu RX, Baoukina S, Tieleman DP. Phase Separation in Atomistic Simulations of Model Membranes. J Am Chem Soc 2020; 142:2844-2856. [DOI: 10.1021/jacs.9b11057] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Ruo-Xu Gu
- Centre for Molecular Simulation and Department of Biological Sciences, University of Calgary, 2500 University Drive, N.W., Calgary, Alberta T2N 1N4, Canada
| | - Svetlana Baoukina
- Centre for Molecular Simulation and Department of Biological Sciences, University of Calgary, 2500 University Drive, N.W., Calgary, Alberta T2N 1N4, Canada
| | - D. Peter Tieleman
- Centre for Molecular Simulation and Department of Biological Sciences, University of Calgary, 2500 University Drive, N.W., Calgary, Alberta T2N 1N4, Canada
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173
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Hanashima S, Yano Y, Murata M. Enantiomers of phospholipids and cholesterol: A key to decipher lipid‐lipid interplay in membrane. Chirality 2020; 32:282-298. [DOI: 10.1002/chir.23171] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2019] [Revised: 12/23/2019] [Accepted: 12/26/2019] [Indexed: 12/13/2022]
Affiliation(s)
- Shinya Hanashima
- Department of Chemistry, Graduate School of ScienceOsaka University Toyonaka Japan
| | - Yo Yano
- Department of Chemistry, Graduate School of ScienceOsaka University Toyonaka Japan
| | - Michio Murata
- Department of Chemistry, Graduate School of ScienceOsaka University Toyonaka Japan
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174
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Furse S, Fernandez-Twinn DS, Jenkins B, Meek CL, Williams HEL, Smith GCS, Charnock-Jones DS, Ozanne SE, Koulman A. A high-throughput platform for detailed lipidomic analysis of a range of mouse and human tissues. Anal Bioanal Chem 2020; 412:2851-2862. [PMID: 32144454 PMCID: PMC7196091 DOI: 10.1007/s00216-020-02511-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 01/31/2020] [Accepted: 02/12/2020] [Indexed: 02/02/2023]
Abstract
Lipidomics is of increasing interest in studies of biological systems. However, high-throughput data collection and processing remains non-trivial, making assessment of phenotypes difficult. We describe a platform for surveying the lipid fraction for a range of tissues. These techniques are demonstrated on a set of seven different tissues (serum, brain, heart, kidney, adipose, liver, and vastus lateralis muscle) from post-weaning mouse dams that were either obese (> 12 g fat mass) or lean (<5 g fat mass). This showed that the lipid metabolism in some tissues is affected more by obesity than others. Analysis of human serum (healthy non-pregnant women and pregnant women at 28 weeks' gestation) showed that the abundance of several phospholipids differed between groups. Human placenta from mothers with high and low BMI showed that lean placentae contain less polyunsaturated lipid. This platform offers a way to map lipid metabolism with immediate application in metabolic research and elsewhere. Graphical abstract.
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Affiliation(s)
- Samuel Furse
- grid.5335.00000000121885934Metabolic Research Laboratories and MRC Metabolic Diseases Unit, Wellcome Trust-MRC Institute of Metabolic Science, University of Cambridge, Box 289, Cambridge Biomedical Campus, Hills Road, Cambridge, CB2 0QQ UK ,grid.5335.00000000121885934Core Metabolomics and Lipidomics Laboratory, Wellcome Trust-MRC Institute of Metabolic Science, University of Cambridge,, Box 289, Cambridge Biomedical Campus, Cambridge, CB2 0QQ UK
| | - Denise S. Fernandez-Twinn
- grid.5335.00000000121885934Metabolic Research Laboratories and MRC Metabolic Diseases Unit, Wellcome Trust-MRC Institute of Metabolic Science, University of Cambridge, Box 289, Cambridge Biomedical Campus, Hills Road, Cambridge, CB2 0QQ UK
| | - Benjamin Jenkins
- grid.5335.00000000121885934Metabolic Research Laboratories and MRC Metabolic Diseases Unit, Wellcome Trust-MRC Institute of Metabolic Science, University of Cambridge, Box 289, Cambridge Biomedical Campus, Hills Road, Cambridge, CB2 0QQ UK ,grid.5335.00000000121885934Core Metabolomics and Lipidomics Laboratory, Wellcome Trust-MRC Institute of Metabolic Science, University of Cambridge,, Box 289, Cambridge Biomedical Campus, Cambridge, CB2 0QQ UK
| | - Claire L. Meek
- grid.5335.00000000121885934Metabolic Research Laboratories and MRC Metabolic Diseases Unit, Wellcome Trust-MRC Institute of Metabolic Science, University of Cambridge, Box 289, Cambridge Biomedical Campus, Hills Road, Cambridge, CB2 0QQ UK ,grid.24029.3d0000 0004 0383 8386Department of Clinical Biochemistry/Wolfson Diabetes & Endocrine Clinic, Cambridge University Hospitals NHS Foundation Trust, Cambridge, CB2 0QQ UK
| | - Huw E. L. Williams
- grid.4563.40000 0004 1936 8868Centre for Biomolecular Sciences, School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD UK
| | - Gordon C. S. Smith
- grid.5335.00000000121885934Department of Obstetrics and Gynaecology, NIHR Cambridge Biomedical Research Centre, University of Cambridge, Cambridge, CB2 0SW UK ,grid.5335.00000000121885934Centre for Trophoblast Research, University of Cambridge, Cambridge, CB2 3EG UK
| | - D. Stephen Charnock-Jones
- grid.5335.00000000121885934Department of Obstetrics and Gynaecology, NIHR Cambridge Biomedical Research Centre, University of Cambridge, Cambridge, CB2 0SW UK ,grid.5335.00000000121885934Centre for Trophoblast Research, University of Cambridge, Cambridge, CB2 3EG UK
| | - Susan E. Ozanne
- grid.5335.00000000121885934Metabolic Research Laboratories and MRC Metabolic Diseases Unit, Wellcome Trust-MRC Institute of Metabolic Science, University of Cambridge, Box 289, Cambridge Biomedical Campus, Hills Road, Cambridge, CB2 0QQ UK
| | - Albert Koulman
- grid.5335.00000000121885934Metabolic Research Laboratories and MRC Metabolic Diseases Unit, Wellcome Trust-MRC Institute of Metabolic Science, University of Cambridge, Box 289, Cambridge Biomedical Campus, Hills Road, Cambridge, CB2 0QQ UK ,grid.5335.00000000121885934Core Metabolomics and Lipidomics Laboratory, Wellcome Trust-MRC Institute of Metabolic Science, University of Cambridge,, Box 289, Cambridge Biomedical Campus, Cambridge, CB2 0QQ UK
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175
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Lopez-Polo J, Silva-Weiss A, Giménez B, Cantero-López P, Vega R, Osorio FA. Effect of lyophilization on the physicochemical and rheological properties of food grade liposomes that encapsulate rutin. Food Res Int 2019; 130:108967. [PMID: 32156401 DOI: 10.1016/j.foodres.2019.108967] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 12/11/2019] [Accepted: 12/26/2019] [Indexed: 12/19/2022]
Abstract
The potential use of liposomes as carriers for food active ingredients can be limited by their physical and chemical instabilities in aqueous dispersions, especially for long-term storage. Lyophilization, a process commonly used in the food industry, can also be applied to stabilize and preserve liposomes and to extend their shelf-life. In this work, liposomes with potential use for designing functional foods were prepared with soy phospholipids and rutin. Homogenization and ultrasound were used for particle size reduction. Liposomal stability was evaluated by Dynamic Light Scattering, microscopy and rheological properties. Spherical and unilamellar liposomes were obtained in this work. Zeta potential (ξ = values were around -40 mV), which indicates a great suspension stability even for more than 30 days of storage. Rutin exerted a protective effect by both preventing damage to the liposome bilayer and maintaining the spherical structure after 56 days of storage. Lyophilization caused an increase in the size of the vesicles, reaching sizes around 419 nm and aggregation of vesicles with probably structural damage after 21 storage days. However, it helped to keep the rutin encapsulated (81.9%) for longer time, when compared to refrigerated liposomes. Rheological measurements showed, in general, that the power law model fitted most of the experimental results and dynamic rheological tests showed a sol-gel phase transition between 35 and 45 °C. Lyophilization caused a significant change in all evaluated rheological parameters. For the in vitro release tests, the liposomal bilayer acted as a barrier for the rutin release to the food simulating medium; therefore, the release rate of the antioxidant from the rutin encapsulated liposome was slow compared to the free rutin release rate.
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Affiliation(s)
- Johana Lopez-Polo
- Department of Food Science and Technology, Universidad de Santiago de Chile, USACH, Avenida Ecuador 3769, Santiago, Chile.
| | - Andrea Silva-Weiss
- Department of Food Science and Technology, Universidad de Santiago de Chile, USACH, Avenida Ecuador 3769, Santiago, Chile
| | - Begoña Giménez
- Department of Food Science and Technology, Universidad de Santiago de Chile, USACH, Avenida Ecuador 3769, Santiago, Chile
| | - Plinio Cantero-López
- Center of Applied Nanoscience (CANS), Facultad de Ciencias Exactas, Universidad Andres Bello, Av. República 275, Santiago, Chile
| | - Ricardo Vega
- Department of Food Science and Technology, Universidad de Santiago de Chile, USACH, Avenida Ecuador 3769, Santiago, Chile
| | - Fernando A Osorio
- Department of Food Science and Technology, Universidad de Santiago de Chile, USACH, Avenida Ecuador 3769, Santiago, Chile.
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176
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Konstantinidi A, Chountoulesi M, Naziris N, Sartori B, Amenitsch H, Mali G, Čendak T, Plakantonaki M, Triantafyllakou I, Tselios T, Demetzos C, Busath DD, Mavromoustakos T, Kolocouris A. The boundary lipid around DMPC-spanning influenza A M2 transmembrane domain channels: Its structure and potential for drug accommodation. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2019; 1862:183156. [PMID: 31846647 DOI: 10.1016/j.bbamem.2019.183156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 12/11/2019] [Accepted: 12/12/2019] [Indexed: 10/25/2022]
Abstract
We have investigated the perturbation of influenza A M2TM in DMPC bilayers. We have shown that (a) DSC and SAXS detect changes in membrane organization caused by small changes (micromolar) in M2TM or aminoadamantane concentration and aminoadamantane structure, by comparison of amantadine and spiro[pyrrolidine-2,2'-adamantane] (AK13), (b) that WAXS and MD can suggest details of ligand topology. DSC and SAXS show that at a low M2TM micromolar concentration in DPMC bilayers, two lipid domains are observed, which likely correspond to M2TM boundary lipids and bulk-like lipids. At higher M2TM concentrations, one domain only is identified, which constitutes essentially all of the lipid molecules behaving as boundary lipids. According to SAXS, WAXS, and DSC in the absence of M2TM, both aminoadamantane drugs exert a similar perturbing effect on the bilayer at low concentrations. At the same concentrations of the drug when M2TM is present, amantadine and, to a lesser extent, AK13 cause, according to WAXS, a significant disordering of chain-stacking, which also leads to the formation of two lipid domains. This effect is likely due, according to MD simulations, to the preference of the more lipophilic AK13 to locate closer to the lateral surfaces of M2TM when compared to amantadine, which forms stronger ionic interactions with phosphate groups. The preference of AK13 to concentrate inside the lipid bilayer close to the exterior of the hydrophobic M2TM helices may contribute to its higher binding affinity compared to amantadine.
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Affiliation(s)
- Athina Konstantinidi
- Section of Pharmaceutical Chemistry, Department of Pharmacy, School of Health Sciences, National and Kapodistrian University of Athens, Athens 15771, Greece
| | - Maria Chountoulesi
- Section of Pharmaceutical Technology, Department of Pharmacy, School of Health Sciences, National and Kapodistrian University of Athens, Athens 15771, Greece
| | - Nikolaos Naziris
- Section of Pharmaceutical Technology, Department of Pharmacy, School of Health Sciences, National and Kapodistrian University of Athens, Athens 15771, Greece
| | - Barbara Sartori
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9/IV, A-8010 Graz, Austria
| | - Heinz Amenitsch
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9/IV, A-8010 Graz, Austria
| | - Gregor Mali
- Department of Inorganic Chemistry and Technology, National Institute of Chemistry, Ljubljana SI-1001, Slovenia
| | - Tomaž Čendak
- Department of Inorganic Chemistry and Technology, National Institute of Chemistry, Ljubljana SI-1001, Slovenia
| | - Maria Plakantonaki
- Department of Chemistry, School of Natural Sciences, University of Patras, Rion, Patras 26500, Greece
| | - Iro Triantafyllakou
- Department of Chemistry, School of Natural Sciences, University of Patras, Rion, Patras 26500, Greece
| | - Theodore Tselios
- Department of Chemistry, School of Natural Sciences, University of Patras, Rion, Patras 26500, Greece
| | - Costas Demetzos
- Section of Pharmaceutical Technology, Department of Pharmacy, School of Health Sciences, National and Kapodistrian University of Athens, Athens 15771, Greece
| | - David D Busath
- Department of Physiology and Developmental Biology, Brigham Young University, Provo, UT 84602, USA
| | - Thomas Mavromoustakos
- Section of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Athens 15771, Greece.
| | - Antonios Kolocouris
- Section of Pharmaceutical Chemistry, Department of Pharmacy, School of Health Sciences, National and Kapodistrian University of Athens, Athens 15771, Greece.
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177
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Lopez-Polo J, Silva-Weiss A, Zamorano M, Osorio FA. Humectability and physical properties of hydroxypropyl methylcellulose coatings with liposome-cellulose nanofibers: Food application. Carbohydr Polym 2019; 231:115702. [PMID: 31888827 DOI: 10.1016/j.carbpol.2019.115702] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Revised: 11/20/2019] [Accepted: 12/02/2019] [Indexed: 11/30/2022]
Abstract
The objective of this study was to investigate the physical, rheological and humectability properties of edible coating forming suspensions (ECS) based on hydroxypropyl methylcellulose (HPMC) containing: liposomes that encapsulate rutin, glycerol and cellulose nanofibers on sliced surfaces of almonds and chocolate. On average, liposomes measured between 110.6 ± 10.0 nm and were characterized as stable and homogeneous suspensions. Adding these liposomes to the edible coatings produced significant changes (p< 0.05) in the density and surface tension, which favor the final appearance of the coating. The presence of liposomes increased the apparent viscosity of the ECS, showing a purely viscous and fluid behavior with a good fit (R2 = 0.9996) with the Power Law model. The presence of liposomes and cellulose nanofibers decreased the value of the cohesive energy of the ECS. The studied ECS partially hydrate the surfaces of almond and chocolate as they showed contact angles under 90°.
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Affiliation(s)
- Johana Lopez-Polo
- Department of Food Science and Technology, Universidad de Santiago de Chile, USACH, Avenida Ecuador 3769, Santiago, Chile.
| | - Andrea Silva-Weiss
- Department of Food Science and Technology, Universidad de Santiago de Chile, USACH, Avenida Ecuador 3769, Santiago, Chile.
| | - Marcela Zamorano
- Department of Food Science and Technology, Universidad de Santiago de Chile, USACH, Avenida Ecuador 3769, Santiago, Chile.
| | - Fernando A Osorio
- Department of Food Science and Technology, Universidad de Santiago de Chile, USACH, Avenida Ecuador 3769, Santiago, Chile.
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178
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Lagarias P, Barkan K, Tzortzini E, Stampelou M, Vrontaki E, Ladds G, Kolocouris A. Insights to the Binding of a Selective Adenosine A 3 Receptor Antagonist Using Molecular Dynamic Simulations, MM-PBSA and MM-GBSA Free Energy Calculations, and Mutagenesis. J Chem Inf Model 2019; 59:5183-5197. [PMID: 31725294 DOI: 10.1021/acs.jcim.9b00751] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Adenosine A3 receptor (A3R) is a promising drug target cancer and for a number of other conditions like inflammatory diseases, including asthma and rheumatoid arthritis, glaucoma, chronic obstructive pulmonary disease, and ischemic injury. Currently, there is no experimentally determined structure of A3R. We explored the binding profile of O4-{[3-(2,6-dichlorophenyl)-5-methylisoxazol-4-yl]carbonyl}-2-methyl-1,3-thiazole-4-carbohydroximamide (K18), which is a new specific and competitive antagonist at the orthosteric binding site of A3R. MD simulations and MM-GBSA calculations of the WT A3R in complex with K18 combined with in vitro mutagenic studies show that the most plausible binding conformation for the dichlorophenyl group of K18 is oriented toward trans-membrane helices (TM) 5, 6 and reveal important residues for binding. Further, MM-GBSA calculations distinguish mutations that reduce or maintain or increase antagonistic activity. Our studies show that selectivity of K18 toward A3R is defined not only by direct interactions with residues within the orthosteric binding area but also by remote residues playing a significant role. Although V1695.30 is considered to be a selectivity filter for A3R binders, when it was mutated to glutamic acid, K18 maintained antagonistic potency, in agreement with our previous results obtained for agonists binding profile investigation. Mutation of the direct interacting residue L903.32 in the low region and the remote L2647.35 in the middle/upper region to alanine increases antagonistic potency, suggesting an empty space in the orthosteric area available for increasing antagonist potency. These results approve the computational model for the description of K18 binding at A3R, which we previously performed for agonists binding to A3R, and the design of more effective antagonists based on K18.
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Affiliation(s)
- Panagiotis Lagarias
- Division of Pharmaceutical Chemistry, Department of Pharmacy, School of Health Sciences , National and Kapodistrian University of Athens , Panepistimioupolis-Zografou , 15771 Athens , Greece
| | - Kerry Barkan
- Department of Pharmacology , University of Cambridge , Tennis Court Road , Cambridge CB2 1PD , United Kingdom
| | - Eva Tzortzini
- Division of Pharmaceutical Chemistry, Department of Pharmacy, School of Health Sciences , National and Kapodistrian University of Athens , Panepistimioupolis-Zografou , 15771 Athens , Greece
| | - Margarita Stampelou
- Division of Pharmaceutical Chemistry, Department of Pharmacy, School of Health Sciences , National and Kapodistrian University of Athens , Panepistimioupolis-Zografou , 15771 Athens , Greece
| | - Eleni Vrontaki
- Division of Pharmaceutical Chemistry, Department of Pharmacy, School of Health Sciences , National and Kapodistrian University of Athens , Panepistimioupolis-Zografou , 15771 Athens , Greece
| | - Graham Ladds
- Department of Pharmacology , University of Cambridge , Tennis Court Road , Cambridge CB2 1PD , United Kingdom
| | - Antonios Kolocouris
- Division of Pharmaceutical Chemistry, Department of Pharmacy, School of Health Sciences , National and Kapodistrian University of Athens , Panepistimioupolis-Zografou , 15771 Athens , Greece
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179
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de Azambuja Borges CRL, Silva NO, Rodrigues MR, Germani Marinho MA, de Oliveira FS, Cassiana M, Horn AP, Parize AL, Flores DC, Clementin RM, de Lima VR. Dimiristoylphosphatidylcholine/genistein molecular interactions: A physico-chemical approach to anti-glioma drug delivery systems. Chem Phys Lipids 2019; 225:104828. [DOI: 10.1016/j.chemphyslip.2019.104828] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 09/03/2019] [Accepted: 09/18/2019] [Indexed: 12/22/2022]
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180
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Highly cooperative fluorescence switching of self-assembled squaraine dye at tunable threshold temperatures using thermosensitive nanovesicles for optical sensing and imaging. Sci Rep 2019; 9:17991. [PMID: 31784685 PMCID: PMC6884458 DOI: 10.1038/s41598-019-54418-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Accepted: 11/15/2019] [Indexed: 12/11/2022] Open
Abstract
Thermosensitive fluorescent dyes can convert thermal signals into optical signals as a molecular nanoprobe. These nanoprobes are playing an increasingly important part in optical temperature sensing and imaging at the nano- and microscale. However, the ability of a fluorescent dye itself has sensitivity and accuracy limitations. Here we present a molecular strategy based on self-assembly to overcome such limitations. We found that thermosensitive nanovesicles composed of lipids and a unique fluorescent dye exhibit fluorescence switching characteristics at a threshold temperature. The switch is rapid and reversible and has a high signal to background ratio (>60), and is also highly sensitive to temperature (10–22%/°C) around the threshold value. Furthermore, the threshold temperature at which fluorescence switching is induced, can be tuned according to the phase transition temperature of the lipid bilayer membrane forming the nanovesicles. Spectroscopic analysis indicated that the fluorescence switching is induced by the aggregation-caused quenching and disaggregation-induced emission of the fluorescent dye in a cooperative response to the thermotropic phase transition of the membrane. This mechanism presents a useful approach for chemical and material design to develop fluorescent nanomaterials with superior fluorescence sensitivity to thermal signals for optical temperature sensing and imaging at the nano- and microscales.
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181
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Naziris N, Saitta F, Chrysostomou V, Libera M, Trzebicka B, Fessas D, Pispas S, Demetzos C. pH-responsive chimeric liposomes: From nanotechnology to biological assessment. Int J Pharm 2019; 574:118849. [PMID: 31759108 DOI: 10.1016/j.ijpharm.2019.118849] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Revised: 11/02/2019] [Accepted: 11/04/2019] [Indexed: 02/08/2023]
Abstract
The utilization of liposomes in biomedical applications has greatly benefited the diagnosis and treatment of various diseases. These biomimetic nano-entities have been very useful in the clinical practice as drug delivery systems in their conventional form, comprising lipids as structural components. However, the scientific efforts have recently shifted towards the development of more sophisticated nanotechnological platforms, which apply functional biomaterials, such as stimuli-responsive polymers, in order to aid the drug molecule targeting concept. These nanosystems are defined as chimeric/mixed, because they combine more than one different in nature biomaterials and their development requires intensive study through biophysical and thermodynamic approaches before they may reach in vivo application. Herein, we designed and developed chimeric liposomes, composed of a phospholipid and pH-responsive amphiphilic diblock copolymers and studied their morphology and behavior based on crucial formulation parameters, including biomaterial concentration, dispersion medium pH and polymer composition. Additionally, their interactions with biological components, pH-responsiveness and membrane thermodynamics were assessed. Finally, preliminary in vivo toxicity experiments of the developed nanosystems were carried out, in order to establish a future protocol for full in vivo evaluation. The results have been correlated with the properties of the chimeric nanosystems and highlight the importance of such approaches for designing and developing effective nanocarriers for biomedical applications.
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Affiliation(s)
- Nikolaos Naziris
- Section of Pharmaceutical Technology, Department of Pharmacy, School of Health Sciences, National and Kapodistrian University of Athens, Panepistimioupolis Zografou, Athens 15771, Greece.
| | - Francesca Saitta
- Department of Food, Environmental and Nutritional Sciences (DeFENS), Università degli Studi di Milano, Via Celoria 2, Milano 20133, Italy.
| | - Varvara Chrysostomou
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, Athens 11635, Greece.
| | - Marcin Libera
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, Zabrze, Poland.
| | - Barbara Trzebicka
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, Zabrze, Poland.
| | - Dimitrios Fessas
- Department of Food, Environmental and Nutritional Sciences (DeFENS), Università degli Studi di Milano, Via Celoria 2, Milano 20133, Italy.
| | - Stergios Pispas
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, Athens 11635, Greece.
| | - Costas Demetzos
- Section of Pharmaceutical Technology, Department of Pharmacy, School of Health Sciences, National and Kapodistrian University of Athens, Panepistimioupolis Zografou, Athens 15771, Greece.
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182
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Wu X, Chantemargue B, Di Meo F, Bourgaux C, Chapron D, Trouillas P, Rosilio V. Deciphering the Peculiar Behavior of β-Lapachone in Lipid Monolayers and Bilayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:14603-14615. [PMID: 31619039 DOI: 10.1021/acs.langmuir.9b02886] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
β-Lapachone (β-Lap) is a promising anticancer drug whose applications have been limited so far because of its poor solubility and stability. Its encapsulation in liposomes has been proposed to overcome these issues. However, surface pressure measurements show that β-Lap exhibits atypical interfacial behavior when mixed with lipids. Although the drug does not seem to be retained in lipid monolayers as deduced from the π-A isotherms, small changes in compressibility moduli suggest that β-Lap actually interacts with lipids, either disorganizing or rigidifying their monolayers. Thermal and structural analyses of lipid bilayers confirm the existence of β-Lap/lipid interactions and show that the drug inserts between hydrophobic chains, close to the polar headgroup in DPPC bilayers and deeper in the acyl chains in POPC bilayers. Molecular dynamics simulations allow a comprehensive description of the drug position and orientation in DOPC and POPC bilayers in the presence or absence of cholesterol.
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Affiliation(s)
- Xiao Wu
- Institut Galien Paris Sud , Univ Paris-Sud, CNRS, Université Paris-Saclay , 92296 Châtenay-Malabry , France
| | - Benjamin Chantemargue
- INSERM U1248, Faculty of Pharmacy , Université de Limoges , 2 rue du Docteur Marcland , 87025 Limoges, Cedex France
- Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science , Palacký University , tr. 17 listopadu 12 , 771 46 Olomouc , Czech Republic
| | - Florent Di Meo
- INSERM U1248, Faculty of Pharmacy , Université de Limoges , 2 rue du Docteur Marcland , 87025 Limoges, Cedex France
| | - Claudie Bourgaux
- Institut Galien Paris Sud , Univ Paris-Sud, CNRS, Université Paris-Saclay , 92296 Châtenay-Malabry , France
| | - David Chapron
- Institut Galien Paris Sud , Univ Paris-Sud, CNRS, Université Paris-Saclay , 92296 Châtenay-Malabry , France
| | - Patrick Trouillas
- INSERM U1248, Faculty of Pharmacy , Université de Limoges , 2 rue du Docteur Marcland , 87025 Limoges, Cedex France
- Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science , Palacký University , tr. 17 listopadu 12 , 771 46 Olomouc , Czech Republic
| | - Véronique Rosilio
- Institut Galien Paris Sud , Univ Paris-Sud, CNRS, Université Paris-Saclay , 92296 Châtenay-Malabry , France
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183
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Stelter D, Keyes T. Simulation of fluid/gel phase equilibrium in lipid vesicles. SOFT MATTER 2019; 15:8102-8112. [PMID: 31588466 DOI: 10.1039/c9sm00854c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Simulation of single component dipalmitoylphosphatidylcholine (DPPC) coarse-grained DRY-MARTINI lipid vesicles of diameter 10 nm (1350 lipids), 20 nm (5100 lipids) and 40 nm (17 600 lipids) is performed using statistical temperature molecular dynamics (STMD), to study finite size effects upon the order-disorder gel/fluid transition. STMD obtains enhanced sampling using a generalized ensemble, obtaining a flat energy distribution between upper and lower cutoffs, with little computational cost over canonical molecular dynamics. A single STMD trajectory of moderate length is sufficient to sample 20+ transition events, without trapping in the gel phase, and obtain well averaged properties. Phase transitions are analyzed via the energy-dependence of the statistical temperature, TS(U). The transition temperature decreases with decreasing diameter, in agreement with experiment, and the transition changes from first order to borderline first-second order. The size- and layer-dependence of the structure of both stable phases, and of the pathway of the phase transition, are determined. It is argued that the finite size effects are primarily caused by the disruption of the gel packing by curvature. Inhomogeneous states with faceted gel patches connected by unusual fluid seams are observed at high curvature, with visually different structure in the inner and outer layers due to the different curvatures. Thus a simple physical picture describes phase transitions in nanoscale finite systems far from the thermodynamic limit.
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Affiliation(s)
- David Stelter
- Boston University, Chemistry Department, 590 Commonwealth Avenue, Boston, MA 02215, USA.
| | - Tom Keyes
- Boston University, Chemistry Department, 590 Commonwealth Avenue, Boston, MA 02215, USA.
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184
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Zinger A, Koren L, Adir O, Poley M, Alyan M, Yaari Z, Noor N, Krinsky N, Simon A, Gibori H, Krayem M, Mumblat Y, Kasten S, Ofir S, Fridman E, Milman N, Lübtow MM, Liba L, Shklover J, Shainsky-Roitman J, Binenbaum Y, Hershkovitz D, Gil Z, Dvir T, Luxenhofer R, Satchi-Fainaro R, Schroeder A. Collagenase Nanoparticles Enhance the Penetration of Drugs into Pancreatic Tumors. ACS NANO 2019; 13:11008-11021. [PMID: 31503443 PMCID: PMC6837877 DOI: 10.1021/acsnano.9b02395] [Citation(s) in RCA: 195] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Overexpressed extracellular matrix (ECM) in pancreatic ductal adenocarcinoma (PDAC) limits drug penetration into the tumor and is associated with poor prognosis. Here, we demonstrate that a pretreatment based on a proteolytic-enzyme nanoparticle system disassembles the dense PDAC collagen stroma and increases drug penetration into the pancreatic tumor. More specifically, the collagozome, a 100 nm liposome encapsulating collagenase, was rationally designed to protect the collagenase from premature deactivation and prolonged its release rate at the target site. Collagen is the main component of the PDAC stroma, reaching 12.8 ± 2.3% vol in diseased mice pancreases, compared to 1.4 ± 0.4% in healthy mice. Upon intravenous injection of the collagozome, ∼1% of the injected dose reached the pancreas over 8 h, reducing the level of fibrotic tissue to 5.6 ± 0.8%. The collagozome pretreatment allowed increased drug penetration into the pancreas and improved PDAC treatment. PDAC tumors, pretreated with the collagozome followed by paclitaxel micelles, were 87% smaller than tumors pretreated with empty liposomes followed by paclitaxel micelles. Interestingly, degrading the ECM did not increase the number of circulating tumor cells or metastasis. This strategy holds promise for degrading the extracellular stroma in other diseases as well, such as liver fibrosis, enhancing tissue permeability before drug administration.
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Affiliation(s)
- Assaf Zinger
- Laboratory for Targeted Drug Delivery and Personalized Medicine Technologies, Department of Chemical Engineering, Technion – Israel Institute of Technology, Haifa 3200003, Israel
| | - Lilach Koren
- Laboratory for Targeted Drug Delivery and Personalized Medicine Technologies, Department of Chemical Engineering, Technion – Israel Institute of Technology, Haifa 3200003, Israel
| | - Omer Adir
- Laboratory for Targeted Drug Delivery and Personalized Medicine Technologies, Department of Chemical Engineering, Technion – Israel Institute of Technology, Haifa 3200003, Israel
| | - Maria Poley
- Laboratory for Targeted Drug Delivery and Personalized Medicine Technologies, Department of Chemical Engineering, Technion – Israel Institute of Technology, Haifa 3200003, Israel
| | - Mohammed Alyan
- Laboratory for Targeted Drug Delivery and Personalized Medicine Technologies, Department of Chemical Engineering, Technion – Israel Institute of Technology, Haifa 3200003, Israel
| | - Zvi Yaari
- Laboratory for Targeted Drug Delivery and Personalized Medicine Technologies, Department of Chemical Engineering, Technion – Israel Institute of Technology, Haifa 3200003, Israel
| | - Nadav Noor
- The School for Molecular Cell Biology and Biotechnology and the Department of Materials Science and Engineering, Tel Aviv University, Tel Aviv 6997800, Israel
| | - Nitzan Krinsky
- Laboratory for Targeted Drug Delivery and Personalized Medicine Technologies, Department of Chemical Engineering, Technion – Israel Institute of Technology, Haifa 3200003, Israel
| | - Assaf Simon
- Laboratory for Targeted Drug Delivery and Personalized Medicine Technologies, Department of Chemical Engineering, Technion – Israel Institute of Technology, Haifa 3200003, Israel
| | - Hadas Gibori
- Department of Physiology and Pharmacology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 6997800, Israel
| | - Majd Krayem
- Laboratory for Targeted Drug Delivery and Personalized Medicine Technologies, Department of Chemical Engineering, Technion – Israel Institute of Technology, Haifa 3200003, Israel
| | - Yelena Mumblat
- Laboratory for Targeted Drug Delivery and Personalized Medicine Technologies, Department of Chemical Engineering, Technion – Israel Institute of Technology, Haifa 3200003, Israel
| | - Shira Kasten
- Laboratory for Targeted Drug Delivery and Personalized Medicine Technologies, Department of Chemical Engineering, Technion – Israel Institute of Technology, Haifa 3200003, Israel
| | - Sivan Ofir
- Laboratory for Targeted Drug Delivery and Personalized Medicine Technologies, Department of Chemical Engineering, Technion – Israel Institute of Technology, Haifa 3200003, Israel
| | - Eran Fridman
- Department of Otolaryngology Head and Neck Surgery, Rambam Healthcare Campus, Technion-Israel Institute of Technology, Haifa 3200000, Israel
| | - Neta Milman
- Department of Otolaryngology Head and Neck Surgery, Rambam Healthcare Campus, Technion-Israel Institute of Technology, Haifa 3200000, Israel
| | - Michael M. Lübtow
- Functional Polymer Materials, Lehrstuhl für Chemische Technologie der Materialsynthese, Julius-Maximilians-Universität Würzburg, Röntgenring 11, Würzburg 97070, Germany
| | - Lior Liba
- The Ruth and Bruce Rappaport Faculty of Medicine, Technion – Israel Institute of Technology, Haifa 3200003, Israel
| | - Jeny Shklover
- Laboratory for Targeted Drug Delivery and Personalized Medicine Technologies, Department of Chemical Engineering, Technion – Israel Institute of Technology, Haifa 3200003, Israel
| | - Janna Shainsky-Roitman
- Laboratory for Targeted Drug Delivery and Personalized Medicine Technologies, Department of Chemical Engineering, Technion – Israel Institute of Technology, Haifa 3200003, Israel
| | - Yoav Binenbaum
- Department of Otolaryngology Head and Neck Surgery, Rambam Healthcare Campus, Technion-Israel Institute of Technology, Haifa 3200000, Israel
| | - Dov Hershkovitz
- Department of Pathology, Tel-Aviv Sourasky Medical Center, Sackler Faculty of Medicine, Tel-Aviv University, Tel Aviv 6997800, Israel
| | - Ziv Gil
- Department of Otolaryngology Head and Neck Surgery, Rambam Healthcare Campus, Technion-Israel Institute of Technology, Haifa 3200000, Israel
| | - Tal Dvir
- The School for Molecular Cell Biology and Biotechnology and the Department of Materials Science and Engineering, Tel Aviv University, Tel Aviv 6997800, Israel
| | - Robert Luxenhofer
- Functional Polymer Materials, Lehrstuhl für Chemische Technologie der Materialsynthese, Julius-Maximilians-Universität Würzburg, Röntgenring 11, Würzburg 97070, Germany
| | - Ronit Satchi-Fainaro
- Department of Physiology and Pharmacology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 6997800, Israel
| | - Avi Schroeder
- Laboratory for Targeted Drug Delivery and Personalized Medicine Technologies, Department of Chemical Engineering, Technion – Israel Institute of Technology, Haifa 3200003, Israel
- Corresponding author: (AS)
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185
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Dovydenko IS, Laricheva YA, Korchagina KV, Grigoryeva AE, Ryabchikova EI, Kompankov NB, Pischur DP, Gushchin AL, Apartsin EK, Sokolov MN. Interaction of Hydrophobic Tungsten Cluster Complexes with a Phospholipid Bilayer. J Phys Chem B 2019; 123:8829-8837. [PMID: 31539247 DOI: 10.1021/acs.jpcb.9b06006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Nanoconstructions composed of lipid vesicles and inorganic units (nanoparticles, metal complexes) arouse much interest across materials science and nanotechnology as hybrid materials combining useful functionalities from both parts. Ideally, these units are to be embedded into the bilayer to keep the biophysical performance of lipid vesicles having inorganic moieties screened from the environment. This can be achieved by doping a lipid bilayer with cluster complexes of transition metals. In this work, we report the preparation of nanoparticles from trinuclear W3S4 cluster complexes and egg phosphatidylcholine. A systematic study of their properties was performed by the differential scanning calorimetry, NMR spectroscopy, dynamic light scattering, and transmission electron microscopy. Phospholipids and clusters have been found to spontaneously self-assemble into novel cluster-lipid hybrid materials. The behavior of clusters in the hydrophobic lipid environment is determined by the structure of the ligands and cluster-to-lipid ratio. Intact cluster complexes bearing compact hydrophobic ligands are embedded into the hydrophobic midplane of a lipid bilayer, whereas cluster complexes bearing larger ligands drive the aggregation of lipids and cluster complexes. Considering these differences, it could be possible to obtain different self-assembled associates such as cluster-doped liposomes or lipid-covered crystals. These cluster-lipid hybrids can be a platform for the design of new materials for nanotechnology.
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Affiliation(s)
- Ilya S Dovydenko
- Institute of Chemical Biology and Fundamental Medicine, SB RAS , 8, Lavrentiev Ave. , Novosibirsk 630090 , Russia
| | - Yuliya A Laricheva
- Nikolaev Institute of Inorganic Chemistry, SB RAS , 3, Lavrentiev Ave. , Novosibirsk 630090 , Russia
| | - Kseniya V Korchagina
- Institute of Chemical Biology and Fundamental Medicine, SB RAS , 8, Lavrentiev Ave. , Novosibirsk 630090 , Russia
| | - Alina E Grigoryeva
- Institute of Chemical Biology and Fundamental Medicine, SB RAS , 8, Lavrentiev Ave. , Novosibirsk 630090 , Russia
| | - Elena I Ryabchikova
- Institute of Chemical Biology and Fundamental Medicine, SB RAS , 8, Lavrentiev Ave. , Novosibirsk 630090 , Russia.,Novosibirsk State University , 2 Pirogov Str. , Novosibirsk 630090 , Russia
| | - Nikolay B Kompankov
- Nikolaev Institute of Inorganic Chemistry, SB RAS , 3, Lavrentiev Ave. , Novosibirsk 630090 , Russia
| | - Denis P Pischur
- Nikolaev Institute of Inorganic Chemistry, SB RAS , 3, Lavrentiev Ave. , Novosibirsk 630090 , Russia
| | - Artem L Gushchin
- Nikolaev Institute of Inorganic Chemistry, SB RAS , 3, Lavrentiev Ave. , Novosibirsk 630090 , Russia.,Novosibirsk State University , 2 Pirogov Str. , Novosibirsk 630090 , Russia
| | - Evgeny K Apartsin
- Institute of Chemical Biology and Fundamental Medicine, SB RAS , 8, Lavrentiev Ave. , Novosibirsk 630090 , Russia.,Novosibirsk State University , 2 Pirogov Str. , Novosibirsk 630090 , Russia
| | - Maxim N Sokolov
- Nikolaev Institute of Inorganic Chemistry, SB RAS , 3, Lavrentiev Ave. , Novosibirsk 630090 , Russia.,Novosibirsk State University , 2 Pirogov Str. , Novosibirsk 630090 , Russia
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186
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Kubyshkin V, Grage SL, Ulrich AS, Budisa N. Bilayer thickness determines the alignment of model polyproline helices in lipid membranes. Phys Chem Chem Phys 2019; 21:22396-22408. [PMID: 31577299 DOI: 10.1039/c9cp02996f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Our understanding of protein folds relies fundamentally on the set of secondary structures found in the proteomes. Yet, there also exist intriguing structures and motifs that are underrepresented in natural biopolymeric systems. One example is the polyproline II helix, which is usually considered to have a polar character and therefore does not form membrane spanning sections of membrane proteins. In our work, we have introduced specially designed polyproline II helices into the hydrophobic membrane milieu and used 19F NMR to monitor the helix alignment in oriented lipid bilayers. Our results show that these artificial hydrophobic peptides can adopt several different alignment states. If the helix is shorter than the thickness of the hydrophobic core of the membrane, it is submerged into the bilayer with its long axis parallel to the membrane plane. The polyproline helix adopts a transmembrane alignment when its length exceeds the bilayer thickness. If the peptide length roughly matches the lipid thickness, a coexistence of both states is observed. We thus show that the lipid thickness plays a determining role in the occurrence of a transmembrane polyproline II helix. We also found that the adaptation of polyproline II helices to hydrophobic mismatch is in some notable aspects different from α-helices. Finally, our results prove that the polyproline II helix is a competent structure for the construction of transmembrane peptide segments, despite the fact that no such motif has ever been reported in natural systems.
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Affiliation(s)
- Vladimir Kubyshkin
- Institute of Chemistry, Technical University of Berlin, Müller-Breslau-Str. 10, Berlin 10623, Germany and Department of Chemistry, University of Manitoba, Dysart Rd. 144, Winnipeg MB R3T 2N2, Canada.
| | - Stephan L Grage
- Institute of Biological Interfaces (IBG-2), Karlsruhe Institute of Technology (KIT), P.O.B. 3640, Karlsruhe 76021, Germany
| | - Anne S Ulrich
- Institute of Biological Interfaces (IBG-2), Karlsruhe Institute of Technology (KIT), P.O.B. 3640, Karlsruhe 76021, Germany and Institute of Organic Chemistry, KIT, Fritz-Haber-Weg 6, Karlsruhe 76131, Germany
| | - Nediljko Budisa
- Institute of Chemistry, Technical University of Berlin, Müller-Breslau-Str. 10, Berlin 10623, Germany and Department of Chemistry, University of Manitoba, Dysart Rd. 144, Winnipeg MB R3T 2N2, Canada.
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187
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Near-Infrared Ag2S quantum dots loaded in phospholipid nanostructures: Physical properties, stability and cytotoxicity. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.123631] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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188
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Viet Nguyen K, Laidmäe I, Kogermann K, Lust A, Meos A, Viet Ho D, Raal A, Heinämäki J, Thi Nguyen H. Preformulation Study of Electrospun Haemanthamine-Loaded Amphiphilic Nanofibers Intended for a Solid Template for Self-Assembled Liposomes. Pharmaceutics 2019; 11:pharmaceutics11100499. [PMID: 31569535 PMCID: PMC6835215 DOI: 10.3390/pharmaceutics11100499] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2019] [Revised: 09/26/2019] [Accepted: 09/27/2019] [Indexed: 12/11/2022] Open
Abstract
Haemanthamine (HAE) has been proven as a potential anticancer agent. However, the therapeutic use of this plant-origin alkaloid to date is limited due to the chemical instability and poorly water-soluble characteristics of the agent. To overcome these challenges, we developed novel amphiphilic electrospun nanofibers (NFs) loaded with HAE, phosphatidylcholine (PC) and polyvinylpyrrolidone (PVP), and intended for a stabilizing platform (template) of self-assembled liposomes of the active agent. The NFs were fabricated with a solvent-based electrospinning method. The chemical structure of HAE and the geometric properties, molecular interactions and physical solid-state properties of the NFs were investigated using nuclear magnetic resonance (NMR) spectroscopy, scanning electron microscopy (SEM), photon correlation spectroscopy (PCS), Fourier transform infrared (FTIR) spectroscopy, X-ray powder diffraction (XRPD) and differential scanning calorimetry (DSC), respectively. An in-house dialysis-based dissolution method was used to investigate the drug release in vitro. The HAE-loaded fibers showed a nanoscale size ranging from 197 nm to 534 nm. The liposomes with a diameter between 63 nm and 401 nm were spontaneously formed as the NFs were exposed to water. HAE dispersed inside liposomes showed a tri-modal dissolution behavior. In conclusion, the present amphiphilic NFs loaded with HAE are an alternative approach for the formulation of a liposomal drug delivery system and stabilization of the liposomes of the present alkaloid.
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Affiliation(s)
- Khan Viet Nguyen
- Faculty of Pharmacy, Hue University of Medicine and Pharmacy, Hue University, 06 Ngo Quyen, Hue City 530000, Viet Nam.
- Institute of Pharmacy, Faculty of Medicine, University of Tartu, Nooruse str. 1, 54011 Tartu, Estonia.
| | - Ivo Laidmäe
- Institute of Pharmacy, Faculty of Medicine, University of Tartu, Nooruse str. 1, 54011 Tartu, Estonia.
| | - Karin Kogermann
- Institute of Pharmacy, Faculty of Medicine, University of Tartu, Nooruse str. 1, 54011 Tartu, Estonia.
| | - Andres Lust
- Institute of Pharmacy, Faculty of Medicine, University of Tartu, Nooruse str. 1, 54011 Tartu, Estonia.
| | - Andres Meos
- Institute of Pharmacy, Faculty of Medicine, University of Tartu, Nooruse str. 1, 54011 Tartu, Estonia.
| | - Duc Viet Ho
- Faculty of Pharmacy, Hue University of Medicine and Pharmacy, Hue University, 06 Ngo Quyen, Hue City 530000, Viet Nam.
| | - Ain Raal
- Institute of Pharmacy, Faculty of Medicine, University of Tartu, Nooruse str. 1, 54011 Tartu, Estonia.
| | - Jyrki Heinämäki
- Institute of Pharmacy, Faculty of Medicine, University of Tartu, Nooruse str. 1, 54011 Tartu, Estonia.
| | - Hoai Thi Nguyen
- Faculty of Pharmacy, Hue University of Medicine and Pharmacy, Hue University, 06 Ngo Quyen, Hue City 530000, Viet Nam.
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189
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Stamatis D, Lagarias P, Barkan K, Vrontaki E, Ladds G, Kolocouris A. Structural Characterization of Agonist Binding to an A 3 Adenosine Receptor through Biomolecular Simulations and Mutagenesis Experiments. J Med Chem 2019; 62:8831-8846. [PMID: 31502843 DOI: 10.1021/acs.jmedchem.9b01164] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The adenosine A3 receptor (A3R) binds adenosine and is a drug target against cancer cell proliferation. Currently, there is no experimental structure of A3R. Here, we have generated a molecular model of A3R in complex with two agonists, the nonselective 1-(6-amino-9H-purin-9-yl)-1-deoxy-N-ethyl-β-d-ribofuranuronamide (NECA) and the selective 1-deoxy-1-[6-[[(3-iodophenyl)methyl]amino]-9H-purin-9-yl]-N-methyl-β-d-ribofuranuronamide (IB-MECA). Molecular dynamics simulations of the wild-type A3R in complex with both agonists, combined with in vitro mutagenic studies revealed important residues for binding. Further, molecular mechanics-generalized Born surface area calculations were able to distinguish mutations that reduce or negate agonistic activity from those that maintained or increased the activity. Our studies reveal that selectivity of IB-MECA toward A3R requires not only direct interactions with residues within the orthosteric binding area but also with remote residues. Although V1695.30 is considered to be a selectivity filter for A3R binders, when it was mutated to glutamic acid or alanine, the activity of IB-MECA increased by making new van der Waals contacts with TM5. This result may have implications in the design of new A3R agonists.
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Affiliation(s)
- Dimitrios Stamatis
- Division of Pharmaceutical Chemistry, Department of Pharmacy, School of Health Sciences , National and Kapodistrian University of Athens , Panepistimiopolis-Zografou , 15771 Athens , Greece
| | - Panagiotis Lagarias
- Division of Pharmaceutical Chemistry, Department of Pharmacy, School of Health Sciences , National and Kapodistrian University of Athens , Panepistimiopolis-Zografou , 15771 Athens , Greece
| | - Kerry Barkan
- Department of Pharmacology , University of Cambridge , Tennis Court Road , CB2 1PD Cambridge U.K
| | - Eleni Vrontaki
- Division of Pharmaceutical Chemistry, Department of Pharmacy, School of Health Sciences , National and Kapodistrian University of Athens , Panepistimiopolis-Zografou , 15771 Athens , Greece
| | - Graham Ladds
- Department of Pharmacology , University of Cambridge , Tennis Court Road , CB2 1PD Cambridge U.K
| | - Antonios Kolocouris
- Division of Pharmaceutical Chemistry, Department of Pharmacy, School of Health Sciences , National and Kapodistrian University of Athens , Panepistimiopolis-Zografou , 15771 Athens , Greece
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190
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Müller S, Schwieger C, Gruhle K, Garamus VM, Hause G, Meister A, Drescher S. Azide-Modified Membrane Lipids: Miscibility with Saturated Phosphatidylcholines. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:12439-12450. [PMID: 31456406 DOI: 10.1021/acs.langmuir.9b01842] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In this study, we describe the miscibility of four azide-modified membrane phospholipids (azidolipids) with conventional phospholipids. The azidolipids bear an azide group at different positions of the sn-1 or sn-2 alkyl chain and they further differ in the type of linkage (ester vs ether) of the sn-2 alkyl chain. Investigations regarding the miscibility of the azidolipids with bilayer-forming phosphatidylcholines will evaluate lipid mixtures that are suitable for the production of stable azidolipid-doped liposomes. These vesicles then serve as model membranes for the incorporation of model peptides or proteins in the future. The miscibility of both types of phospholipids was studied by calorimetric assays, electron microscopy, small-angle X-ray scattering, infrared spectroscopy, and dynamic light scattering to provide a complete biophysical characterization of the mixed systems.
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Affiliation(s)
- Sindy Müller
- Institute of Pharmacy-Biophysical Pharmacy , Martin Luther University (MLU) Halle-Wittenberg , Wolfgang-Langenbeck-Strasse 4 , 06120 Halle (Saale) , Germany
| | - Christian Schwieger
- Institute of Chemistry , MLU Halle-Wittenberg , von-Danckelmann-Platz 4 , 06120 Halle (Saale) , Germany
| | - Kai Gruhle
- Institute of Pharmacy-Biophysical Pharmacy , Martin Luther University (MLU) Halle-Wittenberg , Wolfgang-Langenbeck-Strasse 4 , 06120 Halle (Saale) , Germany
| | - Vasil M Garamus
- Helmholtz-Zentrum Geesthacht (HZG): Zentrum für Material- und Küstenforschung GmbH , Max-Planck-Strasse 1 , 21502 Geesthacht , Germany
| | - Gerd Hause
- Biocenter , MLU Halle-Wittenberg , Weinbergweg 22 , 06120 Halle (Saale) , Germany
| | - Annette Meister
- ZIK HALOmem and Institute of Biochemistry and Biotechnology, Charles Tanford Protein Center , MLU Halle-Wittenberg , Kurt-Mothes-Strasse 3a , 06120 Halle (Saale) , Germany
| | - Simon Drescher
- Institute of Pharmacy-Biophysical Pharmacy , Martin Luther University (MLU) Halle-Wittenberg , Wolfgang-Langenbeck-Strasse 4 , 06120 Halle (Saale) , Germany
- Institute of Pharmacy , University of Greifswald , Friedrich-Ludwig-Jahn-Str. 17 , 17489 Greifswald , Germany
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191
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Lee E, Kundu A, Jeon J, Cho M. Water hydrogen-bonding structure and dynamics near lipid multibilayer surface: Molecular dynamics simulation study with direct experimental comparison. J Chem Phys 2019; 151:114705. [DOI: 10.1063/1.5120456] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Affiliation(s)
- Euihyun Lee
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS), Seoul 02841, Republic of Korea
- Department of Chemistry, Korea University, Seoul 02841, Republic of Korea
| | - Achintya Kundu
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS), Seoul 02841, Republic of Korea
- Department of Chemistry, Korea University, Seoul 02841, Republic of Korea
- Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Max-Born-Str. 2a, 12489 Berlin, Germany
| | - Jonggu Jeon
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS), Seoul 02841, Republic of Korea
| | - Minhaeng Cho
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS), Seoul 02841, Republic of Korea
- Department of Chemistry, Korea University, Seoul 02841, Republic of Korea
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192
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Conrard L, Tyteca D. Regulation of Membrane Calcium Transport Proteins by the Surrounding Lipid Environment. Biomolecules 2019; 9:E513. [PMID: 31547139 PMCID: PMC6843150 DOI: 10.3390/biom9100513] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 09/09/2019] [Accepted: 09/10/2019] [Indexed: 12/11/2022] Open
Abstract
Calcium ions (Ca2+) are major messengers in cell signaling, impacting nearly every aspect of cellular life. Those signals are generated within a wide spatial and temporal range through a large variety of Ca2+ channels, pumps, and exchangers. More and more evidences suggest that Ca2+ exchanges are regulated by their surrounding lipid environment. In this review, we point out the technical challenges that are currently being overcome and those that still need to be defeated to analyze the Ca2+ transport protein-lipid interactions. We then provide evidences for the modulation of Ca2+ transport proteins by lipids, including cholesterol, acidic phospholipids, sphingolipids, and their metabolites. We also integrate documented mechanisms involved in the regulation of Ca2+ transport proteins by the lipid environment. Those include: (i) Direct interaction inside the protein with non-annular lipids; (ii) close interaction with the first shell of annular lipids; (iii) regulation of membrane biophysical properties (e.g., membrane lipid packing, thickness, and curvature) directly around the protein through annular lipids; and (iv) gathering and downstream signaling of several proteins inside lipid domains. We finally discuss recent reports supporting the related alteration of Ca2+ and lipids in different pathophysiological events and the possibility to target lipids in Ca2+-related diseases.
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Affiliation(s)
- Louise Conrard
- CELL Unit, de Duve Institute and Université catholique de Louvain, UCL B1.75.05, avenue Hippocrate, 75, B-1200 Brussels, Belgium
| | - Donatienne Tyteca
- CELL Unit, de Duve Institute and Université catholique de Louvain, UCL B1.75.05, avenue Hippocrate, 75, B-1200 Brussels, Belgium.
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193
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Zander T, Wieland DCF, Raj A, Salmen P, Dogan S, Dėdinaitė A, Garamus VM, Schreyer A, Claesson PM, Willumeit-Römer R. Influence of high hydrostatic pressure on solid supported DPPC bilayers with hyaluronan in the presence of Ca 2+ ions. SOFT MATTER 2019; 15:7295-7304. [PMID: 31483431 DOI: 10.1039/c9sm01066a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The molecular mechanisms responsible for outstanding lubrication of natural systems, like articular joints, have been the focus of scientific research for several decades. One essential aspect is the lubrication under pressure, where it is important to understand how the lubricating entities adapt under dynamic working conditions in order to fulfill their function. We made a structural investigation of a model system consisting of two of the molecules present at the cartilage interface, 1,2-dipalmitoyl-sn-glycero-3-phosphocholine and hyaluronan, at high hydrostatic pressure. Phospholipid layers are found at the cartilage surfaces and are able to considerably reduce friction. Their behavior under load and varied solution conditions is important as pressures of 180 bar are encountered during daily life activities. We focus on how divalent ions, like Ca2+, affect the interaction between DPPC and hyaluronan, as other investigations have indicated that calcium ions influence their interaction. It could be shown that already low amounts of Ca2+ strongly influence the interaction of hyaluronan with DPPC. Our results suggest that the calcium ions increase the amount of adsorbed hyaluronan indicating an increased electrostatic interaction. Most importantly, we observe a modification of the DPPC phase diagram as hyaluronan absorbs to the bilayer which results in an Lα-like structure at low temperatures and a decoupling of the leaflets forming an asymmetric bilayer structure.
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Affiliation(s)
- Thomas Zander
- Helmholtz-Zentrum Geesthacht, Centre for Materials and Costal Research, Institute of Materials Research, Max-Planck-Straße 1, 21502 Geesthacht, Germany.
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194
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Alsaadi EAJ, Neuman BW, Jones IM. A Fusion Peptide in the Spike Protein of MERS Coronavirus. Viruses 2019; 11:E825. [PMID: 31491938 PMCID: PMC6784214 DOI: 10.3390/v11090825] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 08/27/2019] [Accepted: 08/29/2019] [Indexed: 12/20/2022] Open
Abstract
Coronaviruses represent current and emerging threats for many species, including humans. Middle East respiratory syndrome-related coronavirus (MERS-CoV) is responsible for sporadic infections in mostly Middle Eastern countries, with occasional transfer elsewhere. A key step in the MERS-CoV replication cycle is the fusion of the virus and host cell membranes mediated by the virus spike protein, S. The location of the fusion peptide within the MERS S protein has not been precisely mapped. We used isolated peptides and giant unilamellar vesicles (GUV) to demonstrate membrane binding for a peptide located near the N-terminus of the S2 domain. Key residues required for activity were mapped by amino acid replacement and their relevance in vitro tested by their introduction into recombinant MERS S protein expressed in mammalian cells. Mutations preventing membrane binding in vitro also abolished S-mediated syncytium formation consistent with the identified peptide acting as the fusion peptide for the S protein of MERS-CoV.
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Affiliation(s)
| | - Benjamin W Neuman
- Biology Department, CASE, Texas A&M University, Texarkana, TX 75503, USA
| | - Ian M Jones
- School of Biological Sciences, University of Reading, Reading RG6 6AJ, UK.
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195
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Morita K, Horikoshi M, Yanagi T, Takagi T, Takahashi H, Amii H, Hasegawa T, Sonoyama M. Thermotropic Transition Behaviors of Novel Partially Fluorinated Dimyristoylphosphatidylcholines with Different Perfluoroalkyl Chain Lengths. CHEM LETT 2019. [DOI: 10.1246/cl.190389] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Kohei Morita
- Division of Molecular Science, Faculty of Science and Technology, Gunma University, Kiryu, Gunma 376-8515, Japan
| | - Miki Horikoshi
- Division of Molecular Science, Faculty of Science and Technology, Gunma University, Kiryu, Gunma 376-8515, Japan
| | - Tamami Yanagi
- Division of Molecular Science, Faculty of Science and Technology, Gunma University, Kiryu, Gunma 376-8515, Japan
| | - Toshiyuki Takagi
- Biotechnology Research Institute for Drug Discovery, AIST, Tsukuba, Ibaraki 305-8565, Japan
| | - Hiroshi Takahashi
- Division of Pure and Applied Science, Faculty of Science and Technology, Gunma University, Maebashi, Gunma 371-8510, Japan
| | - Hideki Amii
- Division of Molecular Science, Faculty of Science and Technology, Gunma University, Kiryu, Gunma 376-8515, Japan
| | - Takeshi Hasegawa
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Masashi Sonoyama
- Division of Molecular Science, Faculty of Science and Technology, Gunma University, Kiryu, Gunma 376-8515, Japan
- Gunma University Center for Food Science and Wellness (GUCFW), Maebashi, Gunma 371-8510, Japan
- Gunma University Initiative for Advanced Research (GIAR), Maebashi, Gunma 371-8511, Japan
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196
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Tong X, Moradipour M, Novak B, Kamali P, Asare SO, Knutson BL, Rankin SE, Lynn BC, Moldovan D. Experimental and Molecular Dynamics Simulation Study of the Effects of Lignin Dimers on the Gel-to-Fluid Phase Transition in DPPC Bilayers. J Phys Chem B 2019; 123:8247-8260. [DOI: 10.1021/acs.jpcb.9b05525] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Xinjie Tong
- Department of Mechanical and Industrial Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Mahsa Moradipour
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506, United States
| | - Brian Novak
- Department of Mechanical and Industrial Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Poorya Kamali
- Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506, United States
| | - Shardrack O. Asare
- Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506, United States
| | - Barbara L. Knutson
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506, United States
| | - Stephen E. Rankin
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506, United States
| | - Bert C. Lynn
- Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506, United States
| | - Dorel Moldovan
- Department of Mechanical and Industrial Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States
- Center for Computation and Technology, Louisiana State University, Baton Rouge, Louisiana 70803, United States
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197
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Hayashi K, Morimoto K, Kamei T, Mieda E, Ichikawa S, Kuroiwa T, Fujita S, Nakamura H, Umakoshi H. Effect of dehydrocholic acid conjugated with a hydrocarbon on a lipid bilayer composed of 1,2-dioleoyl-sn-glycero-3-phosphocholine. Colloids Surf B Biointerfaces 2019; 181:58-65. [PMID: 31121382 DOI: 10.1016/j.colsurfb.2019.05.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Revised: 04/19/2019] [Accepted: 05/07/2019] [Indexed: 10/26/2022]
Abstract
The effects of bile acids, dehydrocholic acid (DHA) and DHA conjugated with a hydrocarbon (6-aminohexanoate; 6A-DHA) were evaluated using a lipid bilayer composed of 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC). DOPC formed a homogenous thin membrane in presence or absence of the DHA, while 20 mol% 6A-DHA induced phase separation on the DOPC thin membrane. It was observed formation of a stomatocyte-like liposomes when these membranes were suspended in a basic solvent. Generally, liposome formation can be prevented by some bile acids. It was found that DHA and 6A-DHA did not disrupt liposome formation, while DHA and 6A-DHA perturbed the liposomal membrane, resulting in increased local-fluidity due to the bent structure of DHA and 6A-DHA. DHA and 6A-DHA showed completely different effects on the hydrophobicity of the boundary surface of DOPC liposome membranes. The steroidal backbone of DHA was found to prevent the insertion of water molecules into the liposomal membrane, whereas 6A-DHA did not show the same behavior which was attributed to its conjugated hydrocarbon.
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Affiliation(s)
- Keita Hayashi
- Department of Chemical Engineering, National Institute of Technology, Nara College, 22 Yata-cho, Yamatokoriyama, Nara, 639-1080, Japan.
| | - Kazutoshi Morimoto
- Department of Chemical Engineering, National Institute of Technology, Nara College, 22 Yata-cho, Yamatokoriyama, Nara, 639-1080, Japan
| | - Toshiyuki Kamei
- Department of Chemical Engineering, National Institute of Technology, Nara College, 22 Yata-cho, Yamatokoriyama, Nara, 639-1080, Japan
| | - Eiko Mieda
- Department of Chemical Engineering, National Institute of Technology, Nara College, 22 Yata-cho, Yamatokoriyama, Nara, 639-1080, Japan
| | - Sosaku Ichikawa
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8572, Japan
| | - Takashi Kuroiwa
- Department of Chemistry and Energy Engineering, Faculty of Engineering, Tokyo City University, 1-28-1 Tamazutsumi, Setagaya-ku, Tokyo, 158-8557, Japan
| | - Sakiko Fujita
- Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara, 630-0192, Japan
| | - Hidemi Nakamura
- Department of Chemical Engineering, National Institute of Technology, Nara College, 22 Yata-cho, Yamatokoriyama, Nara, 639-1080, Japan
| | - Hiroshi Umakoshi
- Division of Chemical Engineering, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama-cho, Toyonaka, Osaka, 560-8531, Japan
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198
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Helicobacter pylori lipids can form ordered membrane domains (rafts). BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2019; 1861:183050. [PMID: 31449801 DOI: 10.1016/j.bbamem.2019.183050] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Revised: 08/09/2019] [Accepted: 08/21/2019] [Indexed: 02/07/2023]
Abstract
Ordered lipid domains (rafts) are generally considered to be features of eukaryotic cells, but ordered lipid domains formed by cholesterol lipids have been identified in bacteria from the genus Borrelia, and similar cholesterol lipids exist in the bacterium Helicobacter pylori. To determine whether H. pylori lipids could form ordered membrane domains, we investigated domain formation in aqueous dispersions of H. pylori whole lipid extracts, individual H. pylori lipids, or defined mixtures of H. pylori lipids and other membrane-forming lipids. DPH (1,6-diphenyl-1,3,5-hexatriene) anisotropy measurements were used to assay membrane order and FRET (Förster resonance energy transfer) was used to detect the presence of co-existing ordered and disordered domains. We found that H. pylori membrane lipid extracts spontaneously formed lipid domains. Domain formation was more stable when lipids were extracted from H. pylori cells grown in the presence of cholesterol. Certain isolated H. pylori lipids (by themselves or when mixed with other lipids) also had the ability to form ordered domains. To be specific, H. pylori cholesteryl-6-O-tetradecanoyl-α-D-glucopyranoside (CAG) and cholesterol-6-O-phosphatidyl-α-D-glucopyranoside (CPG) had the ability to form and/or stabilize ordered domain formation, while H. pylori phosphatidylethanolamine did not, behaving similarly to unsaturated phosphatidylethanolamines. We conclude that specific H. pylori cholesterol lipids have a marked ability to form ordered lipid domains.
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Pippa N, Stangel C, Kastanas I, Triantafyllopoulou E, Naziris N, Stellas D, Zhang M, Yudasaka M, Demetzos C, Tagmatarchis N. Carbon nanohorn/liposome systems: Preformulation, design and in vitro toxicity studies. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 105:110114. [PMID: 31546408 DOI: 10.1016/j.msec.2019.110114] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 07/29/2019] [Accepted: 08/22/2019] [Indexed: 12/25/2022]
Abstract
In the present work, the convergence of two different drug delivery systems is investigated, namely the combination of carbon nanohorns (CNHs) and liposomes. Our effort initially included the synthesis of two conversely charged carbon nanohorns and their subsequent analysis through various methods. The study of their effect on the thermotropic behavior of artificial membranes provided an essential assistance for the upcoming liposome preparation, which were estimated for their physicochemical properties. The presence of CNHs alters the calorimetric parameters of the lipids. We also prepared CNHs:liposome systems. The characteristic morphology and secondary spherical superstructure of CNHs is retained in the chimeric materials, suggesting that the interactions with the liposomes do not alter the dahlia-flower-like aggregation of CNHs. Both CNHs-liposome systems exhibit a relatively small cellular cytotoxicity in vitro, tested in mouse embryonic fibroblasts. To summarize, we developed CNHs:liposome platforms with a complete knowledge of their thermotropic, physicochemical, morphological and nanotoxicological characteristics.
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Affiliation(s)
- Natassa Pippa
- Section of Pharmaceutical Technology, Department of Pharmacy, School of Health Sciences, National and Kapodistrian University of Athens, Athens 15771, Greece; Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, Athens 11635, Greece
| | - Christina Stangel
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, Athens 11635, Greece
| | - Ioannis Kastanas
- Section of Pharmaceutical Technology, Department of Pharmacy, School of Health Sciences, National and Kapodistrian University of Athens, Athens 15771, Greece
| | - Efstathia Triantafyllopoulou
- Section of Pharmaceutical Technology, Department of Pharmacy, School of Health Sciences, National and Kapodistrian University of Athens, Athens 15771, Greece
| | - Nikolaos Naziris
- Section of Pharmaceutical Technology, Department of Pharmacy, School of Health Sciences, National and Kapodistrian University of Athens, Athens 15771, Greece
| | - Dimitris Stellas
- Biomedical Research Foundation, Academy of Athens, Athens, Greece; Vaccine Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederic, MD, USA
| | - Minfang Zhang
- CNT-Application Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8565, Japan
| | - Masako Yudasaka
- Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8565, Japan
| | - Costas Demetzos
- Section of Pharmaceutical Technology, Department of Pharmacy, School of Health Sciences, National and Kapodistrian University of Athens, Athens 15771, Greece.
| | - Nikos Tagmatarchis
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, Athens 11635, Greece.
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Koulman A, Furse S, Baumert M, Goldberg G, Bluck L. Rapid profiling of triglycerides in human breast milk using liquid extraction surface analysis Fourier transform mass spectrometry reveals new very long chain fatty acids and differences within individuals. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2019; 33:1267-1276. [PMID: 31009547 PMCID: PMC6772081 DOI: 10.1002/rcm.8465] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 04/07/2019] [Accepted: 04/07/2019] [Indexed: 06/09/2023]
Abstract
RATIONALE We describe a novel method for preparing milk samples and profiling their triglyceride (TG) fractions. This method was used to explore how the TG profile of milk modulates as lactation progresses and how the TG profile differs between breasts. METHODS Fresh milk was spotted onto Whatman filter paper and air-dried. Liquid Extraction Surface Analysis coupled to Fourier Transform Mass Spectrometry (LESA-MS) was adapted for molecular profiling. Collision-Induced Dissociation (CID) was used to profile fatty acid residues. RESULTS LESA-MS produced the relative abundances of all isobaric TGs described and showed that mammary glands within one individual can produce a different profile of TGs. CID was used to uncover the configuration of isobaric triglycerides, indicating the relative amounts of the fatty acids contributing to that triglyceride's mass. This also indicated the presence of very long chain fatty acids (C26:0 and C26:1) that have not been reported before in human breast milk. CONCLUSIONS We conclude that spotting on paper and the use of LESA-MS and CID on milk spots is not only a means for analysing milk in unprecedented detail for this preparation time, but is also amenable to conditions in which collecting and storing fresh milk samples for detailed profiling is prohibitively difficult.
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Affiliation(s)
- Albert Koulman
- Cambridge Lipidomics Biomarker Research Initiative, Elsie Widdowson LaboratoryMRC HNRCambridgeCB1 9NLUK
- Lipid Profiling Signalling group, MRC HNRCambridgeCB1 9NLUK
- Core Metabolomics and Lipidomics Laboratory, MRLInstitute of Metabolic ScienceLevel 4, Pathology Building, Addenbrooke's HospitalCambridgeCB2 0QQUK
| | - Samuel Furse
- Core Metabolomics and Lipidomics Laboratory, MRLInstitute of Metabolic ScienceLevel 4, Pathology Building, Addenbrooke's HospitalCambridgeCB2 0QQUK
- Department of BiochemistryUniversity of CambridgeHopkins Building, Tennis Court RoadCambridgeCB2 1QWUK
| | - Mark Baumert
- Advion LtdKao Hockham House, Edinburgh wayHarlowEssexCM20 2NQUK
| | - Gail Goldberg
- Nutrition and Bone Health Group, MRC HNRCambridgeCB1 9NLUK
- MRC KenebaThe Gambia, Calcium, Vitamin D & Bone Health GroupBanjulGambia
| | - Les Bluck
- The Gambia Physiological Modelling of Metabolic Risk, MRC HNRCambridgeCB1 9NLUK
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