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Mancuso A, Tarsitano M, Cavaliere R, Fresta M, Cristiano MC, Paolino D. Gelled Liquid Crystal Nanocarriers for Improved Antioxidant Activity of Resveratrol. Gels 2023; 9:872. [PMID: 37998962 PMCID: PMC10671023 DOI: 10.3390/gels9110872] [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: 10/13/2023] [Revised: 10/30/2023] [Accepted: 10/31/2023] [Indexed: 11/25/2023] Open
Abstract
As many natural origin antioxidants, resveratrol is characterized by non-suitable physicochemical properties for its topical application. To allow its benefits to manifest on human skin, resveratrol has been entrapped within liquid crystal nanocarriers (LCNs) made up of glyceryl monooleate, a penetration enhancer, and DSPE-PEG 750. The nanosystems have been more deeply characterized by using dynamic light scattering and Turbiscan Lab® Expert optical analyzer, and they have been tested in vitro on NCTC 2544. The improved antioxidant activity of entrapped resveratrol was evaluated on keratinocyte cells as a function of its concentration. Finally, to really propose the resveratrol-loaded LCNs for topical use, the systems were gelled by using two different gelling agents, poloxamer P407 and carboxymethyl cellulose, to improve the contact time between skin and formulation. The rheological features of obtained gels were evaluated using two important methods (microrheology at rest and dynamic rheology), before testing their safety profile on human healthy volunteers. The obtained results showed the ability of LCNs to improve antioxidant activity of RSV and the gelled LCNs showed good rheological profiles. In conclusion, the results confirmed the potentiality of gelled resveratrol-loaded nanosystems for skin disease, mainly related to their antioxidant effects.
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Affiliation(s)
- Antonia Mancuso
- Department of Experimental and Clinical Medicine, University “Magna Græcia” of Catanzaro, Campus Universitario “S. Venuta”—Building of BioSciences, Viale S. Venuta, Germaneto, 88100 Catanzaro, Italy; (A.M.); (R.C.)
| | - Martine Tarsitano
- Department of Health Sciences, University “Magna Græcia” of Catanzaro, Campus Universitario “S. Venuta”—Building of BioSciences, Viale S. Venuta, Germaneto, 88100 Catanzaro, Italy; (M.T.); (M.F.)
| | - Rosy Cavaliere
- Department of Experimental and Clinical Medicine, University “Magna Græcia” of Catanzaro, Campus Universitario “S. Venuta”—Building of BioSciences, Viale S. Venuta, Germaneto, 88100 Catanzaro, Italy; (A.M.); (R.C.)
| | - Massimo Fresta
- Department of Health Sciences, University “Magna Græcia” of Catanzaro, Campus Universitario “S. Venuta”—Building of BioSciences, Viale S. Venuta, Germaneto, 88100 Catanzaro, Italy; (M.T.); (M.F.)
| | - Maria Chiara Cristiano
- Department of Medical and Surgical Sciences, University “Magna Græcia” of Catanzaro, Campus Universitario “S. Venuta”—Building of BioSciences, Viale S. Venuta, Germaneto, 88100 Catanzaro, Italy
| | - Donatella Paolino
- Department of Experimental and Clinical Medicine, University “Magna Græcia” of Catanzaro, Campus Universitario “S. Venuta”—Building of BioSciences, Viale S. Venuta, Germaneto, 88100 Catanzaro, Italy; (A.M.); (R.C.)
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Bjørnestad V, Lund R. Pathways of Membrane Solubilization: A Structural Study of Model Lipid Vesicles Exposed to Classical Detergents. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:3914-3933. [PMID: 36893452 PMCID: PMC10035035 DOI: 10.1021/acs.langmuir.2c03207] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 02/17/2023] [Indexed: 06/18/2023]
Abstract
Understanding the pathways of solubilization of lipid membranes is of high importance for their use in biotechnology and industrial applications. Although lipid vesicle solubilization by classical detergents has been widely investigated, there are few systematic structural and kinetic studies where different detergents are compared under varying conditions. This study used small-angle X-ray scattering to determine the structures of lipid/detergent aggregates at different ratios and temperatures and studied the solubilization in time using the stopped-flow technique. Membranes composed of either of two zwitterionic lipids, DMPC or DPPC, and their interactions with three different detergents, sodium dodecyl sulfate (SDS), n-dodecyl-beta-maltoside (DDM), and Triton X-100 (TX-100), were tested. The detergent TX-100 can cause the formation of collapsed vesicles with a rippled bilayer structure that is highly resistant to TX-100 insertion at low temperatures, while at higher temperatures, it partitions and leads to the restructuring of vesicles. DDM also causes this restructuring into multilamellar structures at subsolubilizing concentrations. In contrast, partitioning of SDS does not alter the vesicle structure below the saturation limit. Solubilization is more efficient in the gel phase for TX-100 but only if the cohesive energy of the bilayer does not prevent sufficient partitioning of the detergent. DDM and SDS show less temperature dependence compared to TX-100. Kinetic measurements reveal that solubilization of DPPC largely occurs through a slow extraction of lipids, whereas DMPC solubilization is dominated by fast and burst-like solubilization of the vesicles. The final structures obtained seem to preferentially be discoidal micelles where the detergent can distribute in excess along the rim of the disc, although we do observe the formation of worm- and rodlike micelles in the case of solubilization of DDM. Our results are in line with the suggested theory that bilayer rigidity is the main factor influencing which aggregate is formed.
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Taguchi S, Kang BS, Suga K, Okamoto Y, Jung HS, Umakoshi H. A novel method of vesicle preparation by simple dilution of bicelle solution. Biochem Eng J 2020. [DOI: 10.1016/j.bej.2020.107725] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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4
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The effect of DSPE-PEG2000, cholesterol and drug incorporated in bilayer on the formation of discoidal micelles. Eur J Pharm Sci 2018; 125:74-85. [DOI: 10.1016/j.ejps.2018.09.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 09/06/2018] [Accepted: 09/15/2018] [Indexed: 12/17/2022]
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5
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Talló K, Moner V, De Cabo M, Cócera M, López O. Vesicular nanostructures composed of oleic acid and phosphatidylcholine: Effect of pH and molar ratio. Chem Phys Lipids 2018; 213:96-101. [PMID: 29679547 DOI: 10.1016/j.chemphyslip.2018.04.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Revised: 04/10/2018] [Accepted: 04/11/2018] [Indexed: 10/17/2022]
Abstract
Phospholipids and fatty acids are the main building blocks of biological membranes. Oleic acid is a monounsaturated omega-9 fatty acid commonly found in many natural sources. Its characteristic kinked structure grants this molecule with a great number of biological properties. To better understand the role that this kind of fatty acids play into phospholipid membranes, nanostructured systems formed with hydrogenated soy phosphatidylcholine and oleic acid were studied in this work by means of cryo-electron microscopy, dynamic light scattering and differential scanning calorimetry. Differences concerning size, morphology and phase behavior were found when those systems were prepared at different conditions of pH and molar ratio between both compounds. Broadly, it was seen how alkaline mediums and high proportions of oleic acid reduced the size of the structures and increased the fluidity of the membranes. The ease of preparation of these lipid systems, and the response to pH suggests a future use of these systems as model membranes or delivery systems.
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Affiliation(s)
- K Talló
- Department of Chemical and Surfactant Technology, Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), C/Jordi Girona 18-26, 08034, Barcelona, Spain
| | - V Moner
- Department of Chemical and Surfactant Technology, Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), C/Jordi Girona 18-26, 08034, Barcelona, Spain
| | - M De Cabo
- Servei de Microscòpia, Universitat Autònoma de Barcelona, Campus UAB - Edifici C, 08193, Bellaterra, Spain
| | - M Cócera
- Bicosome S.L., C/Jordi Girona 18-26, 08034, Barcelona, Spain
| | - O López
- Department of Chemical and Surfactant Technology, Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), C/Jordi Girona 18-26, 08034, Barcelona, Spain
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6
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Depalo N, De Leo V, Corricelli M, Gristina R, Valente G, Casamassima E, Comparelli R, Laquintana V, Denora N, Fanizza E, Striccoli M, Agostiano A, Catucci L, Curri ML. Lipid-based systems loaded with PbS nanocrystals: near infrared emitting trackable nanovectors. J Mater Chem B 2017; 5:1471-1481. [PMID: 32264638 DOI: 10.1039/c6tb02590k] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Hydrophobic PbS nanocrystals (NCs) emitting in the near infrared spectral region were encapsulated in the core of micelles and in the bilayer of liposomes, respectively, to form polyethylene glycol (PEG)-grafted phospholipids. The phospholipid-based functionalization process of PbS NCs required the replacement of the pristine capping ligand at the NC surface with thiol molecules. The procedures carried out for two systems, micelles and liposomes, using PEG-modified phospholipids were carefully monitored by optical, morphological and structural investigations. The hydrodynamic diameter and the colloidal stability of both micelles and liposomes loaded with PbS NCs were evaluated using Dynamic Light Scattering (DLS) and ζ-potential experiments, and both were satisfactorily stable in physiological media. The cytotoxicity of the resulting PbS NC-loaded nanovectors was assessed by the in vitro investigation on Saos-2 cells, indicating that the toxicity of the PbS NC loaded liposomes was lower than that of the micelles with the same NC cargo, which is reasonable due to the different overall composition of the two prepared nanocarriers. Finally, the cellular uptake in the Saos-2 cells of both the NC containing systems was evaluated by means of confocal microscopy studies by exploiting a visible fluorescent phospholipid and demonstrating the ability of both luminescent nanovectors to be internalized. The obtained results show the great potential of the prepared emitting nanoprobes for imaging applications in the second biological window.
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Affiliation(s)
- N Depalo
- Istituto per i Processi Chimico-Fisici-CNR UOS Bari, Via Orabona 4, 70125 - Bari, Italy.
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7
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Optimization of lipodisk properties by modification of the extent and density of the PEG corona. J Colloid Interface Sci 2016; 484:86-96. [DOI: 10.1016/j.jcis.2016.08.067] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Revised: 08/25/2016] [Accepted: 08/26/2016] [Indexed: 11/20/2022]
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8
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Nohara T, Sawada T, Tanaka H, Serizawa T. Enzymatic Synthesis of Oligo(ethylene glycol)-Bearing Cellulose Oligomers for in Situ Formation of Hydrogels with Crystalline Nanoribbon Network Structures. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:12520-12526. [PMID: 27340728 DOI: 10.1021/acs.langmuir.6b01635] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Enzymatic synthesis of cellulose and its derivatives has gained considerable attention for use in the production of artificial crystalline nanocelluloses with unique structural and functional properties. However, the poor colloidal stability of the nanocelluloses during enzymatic synthesis in aqueous solutions limits their crystallization-based self-assembly to greater architectures. In this study, oligo(ethylene glycol) (OEG)-bearing cellulose oligomers with different OEG chain lengths were systematically synthesized via cellodextrin phosphorylase-catalyzed oligomerization of α-d-glucose l-phosphate monomers against OEG-bearing β-d-glucose primers. The products were self-assembled into extremely well-grown crystalline nanoribbon network structures with the cellulose II allomorph, potentially due to OEG-derived colloidal stability of the nanoribbon's precursors, followed by the in situ formation of physically cross-linked hydrogels. The monomer conversions, average degree of polymerization, and morphologies of the nanoribbons changed significantly, depending on the OEG chain length. Taken together, our findings open a new avenue for the enzymatic reaction-based facile production of novel cellulosic soft materials with regular nanostructures.
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Affiliation(s)
- Takatoshi Nohara
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology , 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Toshiki Sawada
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology , 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Hiroshi Tanaka
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology , 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Takeshi Serizawa
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology , 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
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Kumar S, Ludwig K, Schade B, von Berlepsch H, Papp I, Tyagi R, Gulia M, Haag R, Böttcher C. Introducing Chirality into Nonionic Dendritic Amphiphiles and Studying Their Supramolecular Assembly. Chemistry 2016; 22:5629-36. [PMID: 26961861 DOI: 10.1002/chem.201504504] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Indexed: 12/22/2022]
Abstract
Chiral head groups have been introduced into water-soluble hydroxyl-terminated nonionic amphiphiles and the impact of the head group stereochemistry on the supramolecular ultrastructures has been studied. Enantiomeric isomers were compared with the achiral meso form and the racemic mixture by means of cryogenic transmission electron microscopy and circular dichroism spectroscopy. Structurally, all amphiphiles are composed of the first-generation hydrophilic polyglycerol head group coupled to a single hydrophobic hexadecyl chain through an amide linkage and diaromatic spacer. The enantiomers aggregate to form twisted ribbons with uniform handedness, whereas the meso stereoisomer and racemic mixture produce elongated assemblies, namely, tubules and platelets, but without a chiral ultrastructure. Simulations on the molecular packing geometries of the stereoisomers indicate different preferential assembly routes that explain the individual supramolecular aggregation behavior.
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Affiliation(s)
- Sumit Kumar
- Department of Chemistry, Deenbandhu Chhotu Ram University of Science & Technology, Murthal-, 131039, Haryana, India.,Institut für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, 14195, Berlin, Germany
| | - Kai Ludwig
- Forschungszentrum für Elektronenmikroskopie, Institut für Chemie und Biochemie, Freie Universität Berlin, Fabeckstrasse 36a, 14195, Berlin, Germany
| | - Boris Schade
- Forschungszentrum für Elektronenmikroskopie, Institut für Chemie und Biochemie, Freie Universität Berlin, Fabeckstrasse 36a, 14195, Berlin, Germany
| | - Hans von Berlepsch
- Forschungszentrum für Elektronenmikroskopie, Institut für Chemie und Biochemie, Freie Universität Berlin, Fabeckstrasse 36a, 14195, Berlin, Germany
| | - Ilona Papp
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, 14195, Berlin, Germany
| | - Rahul Tyagi
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, 14195, Berlin, Germany
| | - Monika Gulia
- Department of Chemistry, Deenbandhu Chhotu Ram University of Science & Technology, Murthal-, 131039, Haryana, India
| | - Rainer Haag
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, 14195, Berlin, Germany
| | - Christoph Böttcher
- Forschungszentrum für Elektronenmikroskopie, Institut für Chemie und Biochemie, Freie Universität Berlin, Fabeckstrasse 36a, 14195, Berlin, Germany.
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10
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Majzoub RN, Ewert KK, Jacovetty EL, Carragher B, Potter CS, Li Y, Safinya CR. Patterned Threadlike Micelles and DNA-Tethered Nanoparticles: A Structural Study of PEGylated Cationic Liposome-DNA Assemblies. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:7073-7083. [PMID: 26048043 PMCID: PMC4554524 DOI: 10.1021/acs.langmuir.5b00993] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The self-assembly of oppositely charged biomacromolecules has been extensively studied due to its pertinence in the design of functional nanomaterials. Using cryo electron microscopy (cryo-EM), optical light scattering, and fluorescence microscopy, we investigated the structure and phase behavior of PEGylated (PEG: poly(ethylene glycol)) cationic liposome-DNA nanoparticles (CL-DNA NPs) as a function of DNA length, topology (linear and circular), and ρ(chg) (the molar charge ratio of cationic lipid to anionic DNA). Although all NPs studied exhibited lamellar internal nanostructure, NPs formed with short (∼2 kbps), linear, polydisperse DNA were defect-rich and contained smaller domains. Unexpectedly, we found distinctly different equilibrium structures away from the isoelectric point. At ρ(chg) > 1, in the excess cationic lipid regime, threadlike micelles rich in PEG-lipid were found to coexist with NPs, cationic liposomes, and spherical micelles. At high concentrations these PEGylated threadlike micelles formed a well-ordered, patterned morphology with highly uniform intermicellar spacing. At ρ(chg) < 1, in the excess DNA regime and with no added salt, individual NPs were tethered together via long, linear DNA (48 kbps λ-phage DNA) into a biopolymer-mediated floc. Our results provide insight into what equilibrium nanostructures can form when oppositely charged macromolecules self-assemble in aqueous media. Self-assembled, well-ordered threadlike micelles and tethered nanoparticles may have a broad range of applications in bionanotechnology, including nanoscale lithograpy and the development of lipid-based multifunctional nanoparticle networks.
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Affiliation(s)
- Ramsey N. Majzoub
- Department of Physics, Department of Materials, and Molecular, Cellular and Developmental, Biology Department, University of California, Santa Barbara CA 93106, USA
| | - Kai K. Ewert
- Department of Physics, Department of Materials, and Molecular, Cellular and Developmental, Biology Department, University of California, Santa Barbara CA 93106, USA
| | - Erica L. Jacovetty
- National Resource for Automated Molecular Microscopy, Department of Integrative, Structural and Computational Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La, Jolla, CA 92037, USA
| | - Bridget Carragher
- National Resource for Automated Molecular Microscopy, Department of Integrative, Structural and Computational Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La, Jolla, CA 92037, USA
| | - Clinton S. Potter
- National Resource for Automated Molecular Microscopy, Department of Integrative, Structural and Computational Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La, Jolla, CA 92037, USA
| | - Youli Li
- Materials Research Laboratory, University of California, Santa Barbara CA 93106, USA
| | - Cyrus R. Safinya
- Department of Physics, Department of Materials, and Molecular, Cellular and Developmental, Biology Department, University of California, Santa Barbara CA 93106, USA
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Correia RF, Viseu MI, Andrade SM. Aggregation/disaggregation of chlorophyll a in model phospholipid-detergent vesicles and micelles. Photochem Photobiol Sci 2014; 13:907-16. [PMID: 24715103 DOI: 10.1039/c3pp50419k] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The photosynthetic pigments of higher plants exist in complex oligomeric states, which are difficult to study in vivo. To investigate aggregation processes of chlorophyll a (Chl a), we used an in vitro reconstitution procedure, with this pigment incorporated into liposomes of 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC), micelles and pre-micelle media of the detergent n-dodecyltrimethylammonium chloride (DTAC), and mixed, spontaneous, DMPC-DTAC vesicles and micelles. Chl a oligomers were characterized by UV-visible absorption, steady-state and time-resolved fluorescence, and fluorescence lifetime imaging microscopy. Equivalent diameters of the colloidal structures were obtained by fluorescence correlation spectroscopy. In DMPC liposomes and DMPC-DTAC vesicles and micelles, three fluorescence lifetimes indicated the coexistence of Chl a monomers (≈5 ns) and oligomers (≈1-2 to ≈0.1 ns). The increase in DTAC amount, in the mixed system, induces a progressive solubilization of DMPC liposomes (from vesicles to micelles) and simultaneous disruption of Chl a aggregates; in pure DTAC micelles, mostly monomers were found. The present work aims for a better understanding of chlorophyll-chlorophyll (Chl-Chl), Chl-lipid, and Chl-detergent interactions in spontaneous colloidal micro- and nanostructures.
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Affiliation(s)
- Raquel F Correia
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
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12
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Disclike vs. cylindrical micelles: Generalized model of micelle growth and data interpretation. J Colloid Interface Sci 2014; 416:258-73. [DOI: 10.1016/j.jcis.2013.11.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Revised: 11/03/2013] [Accepted: 11/06/2013] [Indexed: 11/18/2022]
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13
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Kralchevsky PA, Danov KD, Anachkov SE, Georgieva GS, Ananthapadmanabhan KP. Extension of the ladder model of self-assembly from cylindrical to disclike surfactant micelles. Curr Opin Colloid Interface Sci 2013. [DOI: 10.1016/j.cocis.2013.11.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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14
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Abstract
We present a phase-field model to study the morphological transitions of surfactant micelles in supersaturated dilute solution. Simulations reveal that multiply connected micellar structure can be produced by interface branching instability of a growing micelle at relatively large supersaturation and intermediate spontaneous curvatures. Two branching mechanisms, i.e., a disk-to-cylinder shape transition and a tip bifurcation process, are identified for disklike and cylindrical micelles, respectively. We propose that dynamic branching at the micelle growth front provides an important kinetic pathway for the formation of branched wormlike micelles that are observed in many surfactant systems.
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Affiliation(s)
- Ming Tang
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
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15
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Dürr UH, Soong R, Ramamoorthy A. When detergent meets bilayer: birth and coming of age of lipid bicelles. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2013; 69:1-22. [PMID: 23465641 PMCID: PMC3741677 DOI: 10.1016/j.pnmrs.2013.01.001] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2012] [Accepted: 08/30/2012] [Indexed: 05/12/2023]
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16
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Correia RF, Viseu MI, Prazeres TJ, Martinho JM. Spontaneous vesicles, disks, threadlike and spherical micelles found in the solubilization of DMPC liposomes by the detergent DTAC. J Colloid Interface Sci 2012; 379:56-63. [DOI: 10.1016/j.jcis.2012.04.027] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2012] [Revised: 04/09/2012] [Accepted: 04/10/2012] [Indexed: 10/28/2022]
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17
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Zetterberg MM, Reijmar K, Pränting M, Engström Å, Andersson DI, Edwards K. PEG-stabilized lipid disks as carriers for amphiphilic antimicrobial peptides. J Control Release 2011; 156:323-8. [DOI: 10.1016/j.jconrel.2011.08.029] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2011] [Revised: 07/05/2011] [Accepted: 08/23/2011] [Indexed: 11/28/2022]
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18
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Time evolution of the thermotropic behavior of spontaneous liposomes and disks of the DMPC–DTAC aqueous system. J Colloid Interface Sci 2010; 351:156-65. [DOI: 10.1016/j.jcis.2010.06.061] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2010] [Revised: 06/25/2010] [Accepted: 06/29/2010] [Indexed: 11/19/2022]
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19
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Zhong S, Pochan DJ. Cryogenic Transmission Electron Microscopy for Direct Observation of Polymer and Small-Molecule Materials and Structures in Solution. POLYM REV 2010. [DOI: 10.1080/15583724.2010.493254] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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20
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Wessman P, Edwards K, Mahlin D. Structural effects caused by spray‐ and freeze‐drying of liposomes and bilayer disks. J Pharm Sci 2010; 99:2032-48. [DOI: 10.1002/jps.21972] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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21
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Interaction of N,N,N-trialkylammonioundecahydro-closo-dodecaborates with dipalmitoyl phosphatidylcholine liposomes. Chem Phys Lipids 2010; 163:64-73. [DOI: 10.1016/j.chemphyslip.2009.09.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2009] [Revised: 08/24/2009] [Accepted: 09/24/2009] [Indexed: 11/22/2022]
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22
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Interaction of Na2B12H11SH with dimyristoyl phosphatidylcholine liposomes. Chem Phys Lipids 2008; 157:78-85. [PMID: 19100246 DOI: 10.1016/j.chemphyslip.2008.11.006] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2007] [Revised: 08/25/2008] [Accepted: 11/20/2008] [Indexed: 11/24/2022]
Abstract
Previous investigations have revealed that the boron cluster compound Na2B12H11SH (BSH) is very potent in causing major structural rearrangements of and leakage from phosphatidylcholine liposomes. This somewhat unexpected finding is interesting from a fundamental point of view and may also constitute the basis of future important pharmaceutical/medical applications of BSH. In order to further explore the BSH-lipid interaction, we have studied the effects caused by BSH on dimyristoyl phosphatidylcholine (DMPC) liposomes. Cryo-transmission electron microscopy showed that BSH induces aggregation, membrane rupture and increasing wall thickness of the liposomes. Differential scanning calorimetry revealed a BSH dependent shift of the gel to liquid crystalline phase transition temperature of DMPC. The zeta potential of the liposomes decreases with increasing BSH concentrations, and an apparent dissociation constant of 0.23 mM was found. BSH caused leakage of liposome-encapsulated carboxyfluorescein; leakage was higher at 23 degrees C (near the phase transition temperature) than at 15 degrees C and 37 degrees C. It induced lipid mixing only at very high concentrations.
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