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Huang R, Song H, Wang X, Shen H, Li S, Guan X. Fatty acids-modified liposomes for encapsulation of bioactive peptides: Fabrication, characterization, storage stability and in vitro release. Food Chem 2024; 440:138139. [PMID: 38134830 DOI: 10.1016/j.foodchem.2023.138139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 11/29/2023] [Accepted: 12/02/2023] [Indexed: 12/24/2023]
Abstract
The fragile membranes of liposomes limit their application by the food industry. In this study, we hypothesized that interactions between fatty acids with different chain lengths and phospholipids might enhance liposome stability. Decanoic acid modified liposomes (Lipo-DA) and stearic acid modified liposomes (Lipo-SA) were fabricated for encapsulation of hydrophilic peptides. Fluorescence spectroscopy and FTIR analysis showed molecular interactions existed between alkyl chains and phospholipids, resulting in greater compactness and hydrophobicity of the membranes in Lipo-DA and Lipo-SA. This led to a reduction in melting point characterized by differential scanning calorimetry analysis. Lipo-DA and Lipo-SA could delay the release of hydrophilic peptides compared with unmodified liposomes in simulated digestion. Moreover, Lipo-DA showed better stability during storage, while Lipo-SA exhibited precipitation, resulting in the lowest peptide retention. Our study showed that decanoic acid is suitable to enhance the stability of liposomes, although this approach has yet to be tested in food products.
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Affiliation(s)
- Ruihan Huang
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Hongdong Song
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; National Grain Industry (Urban Grain and Oil Security) Technology Innovation Center, Shanghai 200093, China
| | - Xinyue Wang
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; National Grain Industry (Urban Grain and Oil Security) Technology Innovation Center, Shanghai 200093, China
| | - Huijie Shen
- Weifang Vocational College, Weifang, Shandong, China
| | - Sen Li
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; National Grain Industry (Urban Grain and Oil Security) Technology Innovation Center, Shanghai 200093, China
| | - Xiao Guan
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; National Grain Industry (Urban Grain and Oil Security) Technology Innovation Center, Shanghai 200093, China.
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2
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Foreseeing the future of green Technology. Molecular dynamic investigation on passive membrane penetration by the products of the CO2 and 1,3-butadiene reaction. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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3
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A Differential Scanning Calorimetry (DSC) Experimental Protocol for Evaluating the Modified Thermotropic Behavior of Liposomes with Incorporated Guest Molecules. Methods Mol Biol 2021; 2207:299-312. [PMID: 33113143 DOI: 10.1007/978-1-0716-0920-0_21] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Differential scanning calorimetry (DSC) is a well-established technique, suitable to monitor the interactions that may take place among the drug delivery systems of liposomes and the potential bioactive molecules that are incorporated inside them. Moreover, the DSC technique is considered to be a useful tool to characterize the thermal behavior of lipidic bilayers in the absence and presence of drugs and to highlight parameters, such as the cooperativity between the lipids and the guest molecules (i.e. drugs, polymers, dendrimers), providing also a prediction of the behavior of potential future drug delivery liposomal platforms. In this study, a protocol for DSC measurements on liposomal systems with incorporated guest molecules is described.
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4
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Besifloxacin liposomes with positively charged additives for an improved topical ocular delivery. Sci Rep 2020; 10:19285. [PMID: 33159142 PMCID: PMC7648625 DOI: 10.1038/s41598-020-76381-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 10/22/2020] [Indexed: 02/08/2023] Open
Abstract
Topical ophthalmic antibiotics show low efficacy due to the well-known physiological defense mechanisms of the eye, which prevents the penetration of exogenous substances. Here, we aimed to incorporate besifloxacin into liposomes containing amines as positively charged additives and to evaluate the influence of this charge on drug delivery in two situations: (i) iontophoretic and (ii) passive treatments. Hypothesis are (i) charge might enhance the electromigration component upon current application improving penetration efficiency for a burst drug delivery, and (ii) positive charge might prolong formulation residence time, hence drug penetration. Liposomes elaborated with phosphatidylcholine (LP PC) or phosphatidylcholine and spermine (LP PC: SPM) were stable under storage at 6 ºC for 30 days, showed mucoadhesive characteristics, and were non-irritant, according to HET-CAM tests. Electron paramagnetic resonance spectroscopy measurements showed that neither the drug nor spermine incorporations produced evident alterations in the fluidity of the liposome's membranes, which retained their structural stability even under iontophoretic conditions. Mean diameter and zeta potential were 177.2 ± 2.7 nm and − 5.7 ± 0.3 mV, respectively, for LP PC; and 175.4 ± 1.9 nm and + 19.5 ± 1.0 mV, respectively, for LP PC:SPM. The minimal inhibitory concentration (MIC) and the minimal bactericide concentration (MBC) of the liposomes for P. aeruginosa showed values lower than the commercial formulation (Besivance). Nevertheless, both formulations presented a similar increase in permeability upon the electric current application. Hence, liposome charge incorporation did not prove to be additionally advantageous for iontophoretic therapy. Passive drug penetration was evaluated through a novel in vitro ocular model that simulates the lacrimal flow and challenges the formulation resistance in the passive delivery situation. As expected, LP PC: SPM showed higher permeation than the control (Besivance). In conclusion, besifloxacin incorporation into positively charged liposomes improved passive topical delivery and can be a good strategy to improve topical ophthalmic treatments.
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Localization of Annexin A6 in Matrix Vesicles During Physiological Mineralization. Int J Mol Sci 2020; 21:ijms21041367. [PMID: 32085611 PMCID: PMC7072960 DOI: 10.3390/ijms21041367] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2019] [Revised: 02/07/2020] [Accepted: 02/14/2020] [Indexed: 12/25/2022] Open
Abstract
Annexin A6 (AnxA6) is the largest member of the annexin family of proteins present in matrix vesicles (MVs). MVs are a special class of extracellular vesicles that serve as a nucleation site during cartilage, bone, and mantle dentin mineralization. In this study, we assessed the localization of AnxA6 in the MV membrane bilayer using native MVs and MV biomimetics. Biochemical analyses revealed that AnxA6 in MVs can be divided into three distinct groups. The first group corresponds to Ca2+-bound AnxA6 interacting with the inner leaflet of the MV membrane. The second group corresponds to AnxA6 localized on the surface of the outer leaflet. The third group corresponds to AnxA6 inserted in the membrane's hydrophobic bilayer and co-localized with cholesterol (Chol). Using monolayers and proteoliposomes composed of either dipalmitoylphosphatidylcholine (DPPC) to mimic the outer leaflet of the MV membrane bilayer or a 9:1 DPPC:dipalmitoylphosphatidylserine (DPPS) mixture to mimic the inner leaflet, with and without Ca2+, we confirmed that, in agreement with the biochemical data, AnxA6 interacted differently with the MV membrane. Thermodynamic analyses based on the measurement of surface pressure exclusion (πexc), enthalpy (ΔH), and phase transition cooperativity (Δt1/2) showed that AnxA6 interacted with DPPC and 9:1 DPPC:DPPS systems and that this interaction increased in the presence of Chol. The selective recruitment of AnxA6 by Chol was observed in MVs as probed by the addition of methyl-β-cyclodextrin (MβCD). AnxA6-lipid interaction was also Ca2+-dependent, as evidenced by the increase in πexc in negatively charged 9:1 DPPC:DPPS monolayers and the decrease in ΔH in 9:1 DPPC:DPPS proteoliposomes caused by the addition of AnxA6 in the presence of Ca2+ compared to DPPC zwitterionic bilayers. The interaction of AnxA6 with DPPC and 9:1 DPPC:DPPS systems was distinct even in the absence of Ca2+ as observed by the larger change in Δt1/2 in 9:1 DPPC:DPPS vesicles as compared to DPPC vesicles. Protrusions on the surface of DPPC proteoliposomes observed by atomic force microscopy suggested that oligomeric AnxA6 interacted with the vesicle membrane. Further work is needed to delineate possible functions of AnxA6 at its different localizations and ways of interaction with lipids.
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6
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Benne N, Leboux RJT, Glandrup M, van Duijn J, Lozano Vigario F, Neustrup MA, Romeijn S, Galli F, Kuiper J, Jiskoot W, Slütter B. Atomic force microscopy measurements of anionic liposomes reveal the effect of liposomal rigidity on antigen-specific regulatory T cell responses. J Control Release 2019; 318:246-255. [PMID: 31812539 DOI: 10.1016/j.jconrel.2019.12.003] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 12/03/2019] [Accepted: 12/04/2019] [Indexed: 12/21/2022]
Abstract
Regulatory T cells (Tregs) are vital for maintaining a balanced immune response and their dysfunction is often associated with auto-immune disorders. We have previously shown that antigen-loaded anionic liposomes composed of phosphatidylcholine (PC) and phosphatidylglycerol (PG) and cholesterol can induce strong antigen-specific Treg responses. We hypothesized that altering the rigidity of these liposomes while maintaining their size and surface charge would affect their capability of inducing Treg responses. The rigidity of liposomes is affected in part by the length and saturation of carbon chains of the phospholipids in the bilayer, and in part by the presence of cholesterol. We used atomic force microscopy (AFM) to measure the rigidity of anionic OVA323-containing liposomes composed of different types of PC and PG, with or without cholesterol, in a molar ratio of 4:1(:2) distearoyl (DS)PC:DSPG (Young's modulus (YM) 3611 ± 1271 kPa), DSPC:DSPG:CHOL (1498 ± 531 kPa), DSPC:dipalmitoyl (DP)PG:CHOL (1208 ± 538), DPPC:DPPG:CHOL (1195 ± 348 kPa), DSPC:dioleoyl (DO)PG:CHOL (825 ± 307 kPa), DOPC:DOPG:CHOL (911 ± 447 kPa), and DOPC:DOPG (494 ± 365 kPa). Next, we assessed if rigidity affects the association of liposomes to bone marrow-derived dendritic cells (BMDCs) in vitro. Aside from DOPC:DOPG liposomes, we observed a positive correlation between liposomal rigidity and cellular association. Finally, we show that rigidity positively correlates with Treg responses in vitro in murine DCs and in vivo in mice. Our findings underline the suitability of AFM to measure liposome rigidity and the importance of this parameter when designing liposomes as a vaccine delivery system.
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Affiliation(s)
- Naomi Benne
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden, the Netherlands
| | - Romain J T Leboux
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden, the Netherlands
| | - Marco Glandrup
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden, the Netherlands
| | - Janine van Duijn
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden, the Netherlands
| | - Fernando Lozano Vigario
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden, the Netherlands
| | - Malene Aaby Neustrup
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden, the Netherlands
| | - Stefan Romeijn
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden, the Netherlands
| | | | - Johan Kuiper
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden, the Netherlands
| | - Wim Jiskoot
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden, the Netherlands
| | - Bram Slütter
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden, the Netherlands.
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7
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Cosco D, Mare R, Paolino D, Salvatici MC, Cilurzo F, Fresta M. Sclareol-loaded hyaluronan-coated PLGA nanoparticles: Physico-chemical properties and in vitro anticancer features. Int J Biol Macromol 2019; 132:550-557. [DOI: 10.1016/j.ijbiomac.2019.03.241] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 03/20/2019] [Accepted: 03/31/2019] [Indexed: 11/29/2022]
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8
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Naziris N, Pippa N, Stellas D, Chrysostomou V, Pispas S, Demetzos C, Libera M, Trzebicka B. Development and Evaluation of Stimuli-Responsive Chimeric Nanostructures. AAPS PharmSciTech 2018; 19:2971-2989. [PMID: 30030723 DOI: 10.1208/s12249-018-1112-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 06/22/2018] [Indexed: 11/30/2022] Open
Abstract
Chimeric/mixed stimuli-responsive nanocarriers are promising agents for therapeutic and diagnostic applications, as well as in the combinatorial field of theranostics. Herein, we designed chimeric nanosystems, composed of natural phospholipid and pH-sensitive amphiphilic diblock copolymer, in different molar ratios and assessed the polymer lyotropic effect on their properties. Initially, polymer-grafted bilayers were evaluated for their thermotropic behavior by thermal analysis. Chimeric liposomes were prepared through thin-film hydration and the obtained vesicles were studied by light scattering techniques, to measure their physicochemical characteristics and colloidal stability, as well as by imaging techniques, to elucidate their global and membrane morphology. Finally, in vitro screening of the systems' toxicity was held. The copolymer effect on the membrane phase transition strongly depended on the pH of the surrounding environment. Chimeric nanoparticles were around and above 100 nm, while electron microscopy revealed occasional morphology diversity, probably affecting the toxicity of the systems. The latter was assessed to be tolerable, while dependent on the nanosystems' material concentration, polymer concentration, and polymer composition. All experiments suggested that the thermodynamic and biophysical properties of the nanosystems are copolymer-composition- and concentration-dependent, since different amounts of incorporated polymer would produce divergent effects on the lyotropic liquid crystal membrane. Certain chimeric systems can be exploited as advanced drug delivery nanosystems, based on their overall promising profiles.
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9
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Pippa N, Stellas D, Skandalis A, Pispas S, Demetzos C, Libera M, Marcinkowski A, Trzebicka B. Chimeric lipid/block copolymer nanovesicles: Physico-chemical and bio-compatibility evaluation. Eur J Pharm Biopharm 2016; 107:295-309. [DOI: 10.1016/j.ejpb.2016.08.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Revised: 08/01/2016] [Accepted: 08/03/2016] [Indexed: 12/29/2022]
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10
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Pippa N, Chountoulesi M, Kyrili A, Meristoudi A, Pispas S, Demetzos C. Calorimetric study on pH-responsive block copolymer grafted lipid bilayers: rational design and development of liposomes. J Liposome Res 2015; 26:211-20. [DOI: 10.3109/08982104.2015.1076464] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Natassa Pippa
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Athens, Panepistimioupolis, Zografou, Athens, Greece and
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, Athens, Greece
| | - Maria Chountoulesi
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Athens, Panepistimioupolis, Zografou, Athens, Greece and
| | - Aimilia Kyrili
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Athens, Panepistimioupolis, Zografou, Athens, Greece and
| | - Anastasia Meristoudi
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, Athens, Greece
| | - Stergios Pispas
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, Athens, Greece
| | - Costas Demetzos
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Athens, Panepistimioupolis, Zografou, Athens, Greece and
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11
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Rozenfeld JH, Duarte EL, Ruysschaert JM, Lonez C, Lamy MT. Structural characterization of novel cationic diC16-amidine bilayers: Evidence for partial interdigitation. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2015; 1848:127-33. [DOI: 10.1016/j.bbamem.2014.10.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Revised: 09/25/2014] [Accepted: 10/02/2014] [Indexed: 11/26/2022]
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12
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Cieślik-Boczula K, Petrus RM, Köhler G, Lis T, Koll A. Interaction of Piperidin Derivative of Mannich Base with DPPC Liposomes. J Phys Chem B 2013; 117:2938-46. [DOI: 10.1021/jp311825h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Rafał Michał Petrus
- Faculty of
Chemistry, University of Wroclaw, Joliot-Curie
14, 50-383 Wroclaw, Poland
| | - Gottfried Köhler
- Max F. Perutz Laboratories, Department of Computational and Structural
Biology, University of Vienna, Campus Vienna
Biocenter 5/1, Vienna 1030, Austria
| | - Tadeusz Lis
- Faculty of
Chemistry, University of Wroclaw, Joliot-Curie
14, 50-383 Wroclaw, Poland
| | - Aleksander Koll
- Faculty of
Chemistry, University of Wroclaw, Joliot-Curie
14, 50-383 Wroclaw, Poland
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Caruso B, Sánchez JM, García DA, de Paula E, Perillo MA. Probing the combined effect of flunitrazepam and lidocaine on the stability and organization of bilayer lipid membranes. A differential scanning calorimetry and dynamic light scattering study. Cell Biochem Biophys 2012; 66:461-75. [PMID: 23269502 DOI: 10.1007/s12013-012-9494-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Combined effects of flunitrazepam (FNZ) and lidocaine (LDC) were studied on the thermotropic equilibrium of dipalmitoyl phosphatidylcholine (dpPC) bilayers. This adds a thermodynamic dimension to previously reported geometric analysis in the erythrocyte model. LDC decreased the enthalpy and temperature for dpPC pre- and main-transitions (ΔHp, ΔHm, Tp, Tm) and decreased the cooperativity of the main-transition (ΔT(1/2,m)). FNZ decreased ΔHm and, at least up to 59 μM, also decreased ΔHp. In conjunction with LDC, FNZ induced a recovery of ∆T(1/2,m) control values and increased ΔHm even above the control level. The deconvolution of the main-transition peak at high LDC concentrations revealed three components possibly represented by: a self-segregated fraction of pure dpPC, a dpPC-LDC mixture and a phase with a lipid structure of intermediate stability associated with LDC self-aggregation within the lipid phase. Some LDC effects on thermodynamic parameters were reverted at proper LDC/FNZ molar ratios, suggesting that FNZ restricts the maximal availability of the LDC partitioned into the lipid phase. Thus, beyond its complexity, the lipid-LDC mixture can be rationalized as an equilibrium of coexisting phases which gains homogeneity in the presence of FNZ. This work stresses the relevance of nonspecific drug-membrane binding on LDC-FNZ pharmacological interactions and would have pharmaceutical applications in liposomal multidrug-delivery.
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Affiliation(s)
- Benjamín Caruso
- Departamento de Química, FCEFyN, Instituto de Investigaciones Biológicas y Tecnológicas (IIBYT), CONICET-Universidad Nacional de Córdoba, Córdoba, Argentina.
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Wang L, Yang CQ, Wang J. Effects of loading procedures of magnetic nanoparticles on the structure and physicochemical properties of cisplatin magnetic liposomes. J Microencapsul 2012; 29:781-9. [PMID: 22657750 DOI: 10.3109/02652048.2012.692397] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The effects of different loading procedures of magnetic nanoparticles (MNs) on the structure and physicochemical properties of cisplatin magnetic liposomes were investigated by X-ray diffraction, infrared spectroscopy, transmission electron microscopy, and fluorescence spectroscopy. 1, 2-Dipalmitoyl-sn-glycero-3-Phosphocholine based cisplatin magnetic liposomes were prepared using two different procedures. In procedure I, MNs were combined with phospholipids during film formation; MNs were embedded in a phospholipid bilayer. In procedure II, MNs were mixed with drugs during hydration and MNs were contained in an interior aqueous compartment. The encapsulation efficiency of cisplain and the content of MN in procedure I liposomes were 33.5% ± 3.3% and 2.34 ± 0.09 mg mL(-1), respectively. It indicated that the deliberate MN loading into the liposome structure was not only successful using procedure I, but also superior over procedure II both in cisplatin encapsulation efficiency and MN content, which can promote the magnetic targeting effect of magnetic liposomes during delivering cisplatin.
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Affiliation(s)
- Lu Wang
- School of Pharmaceutical Sciences, Hebei Medical University, Shijiazhuang, China
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15
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Oliveira TR, Duarte EL, Lamy MT, Vandenbranden M, Ruysschaert JM, Lonez C. Temperature-dependence of cationic lipid bilayer intermixing: possible role of interdigitation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:4640-4647. [PMID: 22332736 DOI: 10.1021/la3001569] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In this work, we investigated the properties of a fusogenic cationic lipid, diC14-amidine, and show that this lipid possesses per se the capacity to adopt either an interdigitated structure (below and around its transition temperature) or a lamellar structure (above the transition temperature). To provide experimental evidence of this lipid bilayer organization, phospholipids spin-labeled at different positions of the hydrocarbon chain were incorporated into the membrane and their electron spin resonance (ESR) spectra were recorded at different temperatures. For comparison, similar experiments were performed with dimyristoyl phosphatidylcholine, a zwitterionic lipid (DMPC) which adopts a bilayer organization over a broad temperature range. Lipid mixing between diC14-amidine and asolectin liposomes was more efficient below (10-15 °C) than above the transition temperature (above 25 °C). This temperature-dependent "fusogenic" activity of diC14-amidine liposomes is opposite to what has been observed so far for peptides or virus-induced fusion. Altogether, our data suggest that interdigitation is a highly fusogenic state and that interdigitation-mediated fusion occurs via an unusual temperature-dependent mechanism that remains to be deciphered.
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Affiliation(s)
- Tiago R Oliveira
- Instituto de Física, Universidade de São Paulo, São Paulo, Brazil
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16
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Liu Y, Yoo SD, Li L, Fang L, Wen Z, Li T. Formulation and characterization of boanmycin-loaded liposomes prepared by pH gradient experimental design. Drug Deliv 2012; 19:90-101. [DOI: 10.3109/10717544.2011.649217] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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17
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18
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Gardikis K, Hatziantoniou S, Signorelli M, Pusceddu M, Micha-Screttas M, Schiraldi A, Demetzos C, Fessas D. Thermodynamic and structural characterization of Liposomal-Locked in-Dendrimers as drug carriers. Colloids Surf B Biointerfaces 2010; 81:11-9. [DOI: 10.1016/j.colsurfb.2010.06.010] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2010] [Revised: 06/16/2010] [Accepted: 06/16/2010] [Indexed: 10/19/2022]
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19
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Efrat R, Abramov Z, Aserin A, Garti N. Nonionic−Anionic Mixed Surfactants Cubic Mesophases. Part I: Structural Chaotropic and Kosmotropic Effect. J Phys Chem B 2010; 114:10709-16. [DOI: 10.1021/jp103799a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Rivka Efrat
- Casali Institute of Applied Chemistry, The Institute of Chemistry, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Jerusalem 91904, Israel
| | - Zoya Abramov
- Casali Institute of Applied Chemistry, The Institute of Chemistry, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Jerusalem 91904, Israel
| | - Abraham Aserin
- Casali Institute of Applied Chemistry, The Institute of Chemistry, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Jerusalem 91904, Israel
| | - Nissim Garti
- Casali Institute of Applied Chemistry, The Institute of Chemistry, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Jerusalem 91904, Israel
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20
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Inhomogeneities in sodium decylsulfate doped 1,2-dipalmitoylphosphatidylcholine bilayer. J Colloid Interface Sci 2010; 343:401-7. [DOI: 10.1016/j.jcis.2009.11.054] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2009] [Revised: 11/19/2009] [Accepted: 11/20/2009] [Indexed: 11/17/2022]
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21
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Manconi M, Marongiu F, Ennas G, Scano A, Sinico C, Valenti D, Fadda A. Liposomes for (trans)dermal delivery of tretinoin: influence of drug concentration and vesicle composition. J Drug Deliv Sci Technol 2008. [DOI: 10.1016/s1773-2247(08)50061-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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