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de Andrade L, Duarte EL, Lamy MT, Rozenfeld JHK. Thermotropic Behavior and Structural Organization of C24:1 Sulfatide Dispersions and Its Mixtures with Cationic Bilayers. ACS OMEGA 2023; 8:5306-5315. [PMID: 36816677 PMCID: PMC9933474 DOI: 10.1021/acsomega.2c06189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Accepted: 01/20/2023] [Indexed: 06/18/2023]
Abstract
C24:1 sulfatide (SF) is an endogenous activator of type II NKT cells. The thermotropic behavior and structure of SF dispersions and its mixtures (4.8-16.6 mol %) with cationic dioctadecyldimethylammonium bromide (DODAB) bilayers were investigated by differential scanning calorimetry and electron paramagnetic resonance spectroscopy. The non-interdigitated lamellar structures formed by pure SF display broad thermal events around 27.5 °C when heated and cooled. These events disappear upon mixing with DODAB, showing complete lipid miscibility. SF decreases the DODAB gel-phase packing, with a consequent decrease in phase-transition temperatures and cooperativity upon heating. In contrast, SF increases the rigidity of the DODAB fluid phase, resulting in a smaller decrease in transition temperatures upon cooling. The hysteresis between heating and cooling decreased as the SF molar fraction increased. These effects on DODAB are similar to the ones described for other glycolipids, such as αGalCer and βGlcCer. This might be due to the orientation of the rigid and planar amide bond that connects their sphingoid bases and acyl chains, which result in a V-shaped conformation of the glycolipid molecules. The current results may be important to plan and develop new immunotherapeutic tools based on SF.
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Affiliation(s)
- Lucas de Andrade
- Departamento
de Biofísica, Escola Paulista de Medicina, Universidade Federal de São Paulo, R. Botucatu 862, 04023-062São Paulo, São Paulo, Brazil
| | - Evandro L. Duarte
- Instituto
de Física, Universidade de São
Paulo, Rua do Matão
1371, 05508090São
Paulo, São Paulo, Brazil
| | - M. Teresa Lamy
- Instituto
de Física, Universidade de São
Paulo, Rua do Matão
1371, 05508090São
Paulo, São Paulo, Brazil
| | - Julio H. K. Rozenfeld
- Departamento
de Biofísica, Escola Paulista de Medicina, Universidade Federal de São Paulo, R. Botucatu 862, 04023-062São Paulo, São Paulo, Brazil
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2
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Mansur-Alves I, Lima BLF, Santos TT, Araújo NF, Frézard F, Islam A, de Barros AL, Dos Santos DC, Fernandes C, Ferreira LA, Aguiar MM. Cholesterol improves stability of amphotericin B nanoemulsion: promising use in the treatment of cutaneous leishmaniasis. Nanomedicine (Lond) 2022; 17:1237-1251. [PMID: 36189757 DOI: 10.2217/nnm-2021-0489] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Aim: Amphotericin B (AmB) is an antileishmanial drug with high toxicity; however, this drawback might overcome by decreasing the AmB self-aggregation state. This work aimed at evaluating the influence of cholesterol on the aggregation state of AmB loaded in a nanoemulsion (NE-AmB) for the treatment of cutaneous leishmaniasis. NE-AmB (1, 4 and 8 mg/kg/day) was administered intravenously to animals infected by Leishmania major every 2 days for a total of five injections. Results: Ultraviolet-visible spectroscopy and circular dichroism studies demonstrated that cholesterol reduced AmB aggregation state in NE. NE-AmB was stable after 180 days, and its hemolytic toxicity was lower than that observed for the conventional AmB. NE-AmB administered intravenously into animals infected by Leishmania major at 8 mg/kg was capable of stabilizing the lesion size and reducing the parasitic load. Conclusion: These findings support the NE potential as a stable nanocarrier for AmB in the treatment of cutaneous leishmaniasis.
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Affiliation(s)
- Izabela Mansur-Alves
- Department of Pharmaceutics, Faculty of Pharmacy, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, 31270-010, Brazil
| | - Brenda Lorrayne Furtado Lima
- Department of Pharmaceutics, Faculty of Pharmacy, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, 31270-010, Brazil
| | - Thais Tunes Santos
- Department of Pharmaceutics, Faculty of Pharmacy, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, 31270-010, Brazil
| | - Naialy F Araújo
- Department of Pharmaceutics, Faculty of Pharmacy, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, 31270-010, Brazil
| | - Frédéric Frézard
- Department of Physiology & Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, 31270-010, Brazil
| | - Arshad Islam
- Department of Pathology, Government Lady Reading Hospital, Medical Teaching Institution, Peshawar, 25100, Pakistan
| | - André Lb de Barros
- Department of Clinical & Toxicological Analysis, Faculty of Pharmacy, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, 31270-010, Brazil
| | - Délia Cm Dos Santos
- Department of Pharmacy & Nutrition, Center for Exact, Natural & Health Sciences, Federal University of Espírito Santo, Alto Universitario, Alegre, Espírito Santo, 29500-000, Brazil
| | - Christian Fernandes
- Department of Pharmaceutics, Faculty of Pharmacy, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, 31270-010, Brazil
| | - Lucas Am Ferreira
- Department of Pharmaceutics, Faculty of Pharmacy, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, 31270-010, Brazil
| | - Marta Mg Aguiar
- Department of Pharmaceutics, Faculty of Pharmacy, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, 31270-010, Brazil
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3
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Kulkarni JA, Chen S, Tam YYC. Scalable Production of Lipid Nanoparticles Containing Amphotericin B. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:7312-7319. [PMID: 34101472 DOI: 10.1021/acs.langmuir.1c00530] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Lipid-based formulations have been developed to improve stability profiles, tolerability, and toxicity profiles of small molecule drugs. However, manufacture of such formulations involving lipophilic compounds can be labor-intensive and difficult to scale because of solubility and solvent compatibility issues. We have developed a rapid and scalable approach using rapid-mixing techniques to generate homogeneous lipid nanoparticle (LNP) formulations of siRNA, triglycerides, and hydrophilic weak-base drugs. Here, we used this approach to entrap a hydrophobic small molecule, Amphotericin B (AmpB), a hydrophobic drug not soluble in ethanol. The three prototypes presented in this study were derived from LNP-siRNA systems, triglyceride nanoparticles, and liposomal systems. Cryogenic transmission electron microscopy (cryo-TEM) revealed that all three LNP-AmpB formulations retain structural characteristics of the parent (AmpB-free) LNPs, with particles remaining stable for at least 1 month. All formulations showed similar in vitro toxicity profiles in comparison to AmBisome. Importantly, the formulations have a 2.5-fold improved IC50 for fungal growth inhibition as compared to AmBisome in in vitro efficacy studies. These results demonstrate that the rapid-mixing technology combined with dimethyl sulfoxide (DMSO) for drugs insoluble in other organic solvents can be a powerful manufacturing method for the generation of stable LNP drug formulations.
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Affiliation(s)
- Jayesh A Kulkarni
- Department of Biochemistry and Molecular Biology, University of British Columbia, 2350 Health Sciences Mall, Vancouver, British Columbia V6T 1Z3, Canada
- NanoVation Therapeutics, 2405 Wesbrook Mall, Vancouver, British Columbia V6T 1Z3 Canada
| | - Sam Chen
- Integrated Nanotherapeutics Inc., 205-4475 Wayburne Drive, Burnaby, British Columbia V5G 4X4, Canada
| | - Yuen Yi C Tam
- Department of Biochemistry and Molecular Biology, University of British Columbia, 2350 Health Sciences Mall, Vancouver, British Columbia V6T 1Z3, Canada
- Integrated Nanotherapeutics Inc., 205-4475 Wayburne Drive, Burnaby, British Columbia V5G 4X4, Canada
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4
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Mohammadi G, Fathian-Kolahkaj M, Mohammadi P, Adibkia K, Fattahi A. Preparation, Physicochemical Characterization and Anti-Fungal Evaluation of Amphotericin B-Loaded PLGA-PEG-Galactosamine Nanoparticles. Adv Pharm Bull 2020; 11:311-317. [PMID: 33880353 PMCID: PMC8046404 DOI: 10.34172/apb.2021.044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 07/11/2020] [Accepted: 07/15/2020] [Indexed: 12/19/2022] Open
Abstract
Purpose: The present study aimed to formulate PLGA and PLGA-PEG-galactosamine nanoparticles (NPs) loaded with amphotericin B with appropriate physicochemical properties and antifungal activity. PLGA was functionalized with GalN to increase the adhesion and antifungal activity of NPs against Candida albicans. Methods: The physicochemical properties of NPs were characterized by particle size determination, zeta potential, drug crystallinity, loading efficiency, dissolution studies, differential scanning calorimeter (DSC), X-ray powder diffraction (XRPD), and Fourier transform infrared (FT-IR). Antifungal activity of the NPs at different drug/polymer ratios was examined by determining minimum inhibitory concentrations (MICs). Results: the FT-IR and 1 HNMR analysis successfully confirmed the formation of PLGA- PEG-GalN NPs. The PLGA NPs were in the size range of 174.1 ± 3.49 to 238.2±7.59 nm while PLGA-GalN NPs were 255.6 ±4.08 nm in size , respectively. Loading efficiency was in the range of 67%±2.4 to 77%±1.6, and entrapment efficiency in the range of 68.185%±1.9 to 73.05%±0.6. Zeta potential and loading efficiency for PLGA-GalN NPs were –0.456, 71%. The NPs indicated an amorphous status according to XRPD patterns and DSC thermograms. The PLGA-PEG-GalN NPs showed higher fungistatic activity than PLGA NPs. Conclusion: the results demonstrated that the antifungal activity of PLGA-PEG-GalN NPs was higher than pure amphotericin B and PLGA NPs.
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Affiliation(s)
- Ghobad Mohammadi
- Pharmaceutical Sciences Research Center Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | | | - Pardis Mohammadi
- Pharmaceutical Sciences Research Center Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Khosro Adibkia
- Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Ali Fattahi
- Pharmaceutical Sciences Research Center Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
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5
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Suga K, Kitagawa K, Taguchi S, Okamoto Y, Umakoshi H. Evaluation of Molecular Ordering in Bicelle Bilayer Membranes Based on Induced Circular Dichroism Spectra. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:3242-3250. [PMID: 32163713 DOI: 10.1021/acs.langmuir.9b03710] [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
Bicelles are submicrometer-sized disc-shaped molecular self-assemblies that can be obtained in aqueous solution by dispersing mixtures of certain amphiphiles. Although phospholipid bicelle and phospholipid vesicle assemblies adopt similar lipid bilayer structures, the differences in bilayer characteristics, especially physicochemical properties such as bilayer fluidity, are not clearly understood. Herein, we report the lipid ordering properties of bicelle bilayer membranes based on induced circular dichroism (ICD) and fluorescence polarization analyses using 1,6-diphenyl-1,3,5-hexatriene (DPH) as a probe. Bicelles were prepared by using 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC) and 1,2-dihexanoyl-sn-glycero-3-phosphocholine (DHPC), while pure DMPC vesicles and pure DHPC micelles were used as references. At temperatures below the phase transition temperature of DMPC, the bicelles showed lower membrane fluidities, whereas DHPC micelles showed higher membrane fluidity, suggesting no significant differences in bilayer fluidity between the bicelle and vesicle assemblies. The ICD signals of DPH were induced only when the membrane was in ordered (solid-ordered or ripple-gel) phases. In the bicelle systems, the ICD of DPH was more significant than that of the DMPC vesicle. The induced chirality of DPH was dependent on the chirality of the bilayer lipid. Compared to that of the DMPC/DHPC bicelle, the ICD of the 1,2-dipalmitoyl-sn-glycero-3-phosphocholine/DHPC bicelle was higher, while that of the bovine sphingomyelin/DHPC bicelle was lower. Because the lipids are tightly packed in the ordered phase, the ICD intensity reflects the molecular ordering state of the lipids in the bicelle bilayer.
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Affiliation(s)
- Keishi Suga
- Division of Chemical Engineering, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama-cho, Toyonaka, Osaka 5608531, Japan
| | - Kazuki Kitagawa
- Division of Chemical Engineering, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama-cho, Toyonaka, Osaka 5608531, Japan
| | - Shogo Taguchi
- Department of Chemical Engineering and Materials Science, Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo 6712280, Japan
| | - Yukihiro Okamoto
- Division of Chemical Engineering, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama-cho, Toyonaka, Osaka 5608531, Japan
| | - Hiroshi Umakoshi
- Division of Chemical Engineering, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama-cho, Toyonaka, Osaka 5608531, Japan
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6
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Martins LS, Nomura DA, Duarte EL, Riske KA, Lamy MT, Rozenfeld JHK. Structural characterization of cationic DODAB bilayers containing C24:1 β-glucosylceramide. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2019; 1861:643-650. [PMID: 30611744 DOI: 10.1016/j.bbamem.2018.12.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Revised: 12/09/2018] [Accepted: 12/28/2018] [Indexed: 01/13/2023]
Abstract
The effect of 5 mol%, 9 mol%, and 16 mol% of C24:1 β-glucosylceramide (βGlcCer) on the structure of cationic DODAB bilayers was investigated by means of differential scanning calorimetry (DSC), electron spin resonance (ESR) spectroscopy and fluorescence microscopy. βGlcCer is completely miscible with DODAB at all fractions tested, since no domains were observed in fluorescence microscopy or ESR spectra. The latter showed that βGlcCer destabilized the gel phase of DODAB bilayers by decreasing the gel phase packing. As a consequence, βGlcCer induced a decrease in the phase transition temperature and cooperativity of DODAB bilayers, as seen in DSC thermograms. ESR spectra also showed that βGlcCer induced an increase in DODAB fluid phase order and/or rigidity. Despite their different structures, a similar effect of loosening the gel phase packing and turning the fluid phase more rigid/organized has also been observed when low molar fractions of cholesterol were incorporated in DODAB bilayers. The structural characterization of mixed membranes made of cationic lipids and glucosylceramides may be important for developing novel immunotherapeutic tools such as vaccine adjuvants.
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Affiliation(s)
- Letícia S Martins
- Departamento de Biofísica, Escola Paulista de Medicina, Universidade Federal de São Paulo, R. Botucatu 862, 04023-062 São Paulo, SP, Brazil
| | - Daniela A Nomura
- Instituto de Física, Universidade de São Paulo, CP 66318, CEP 05315-970 São Paulo, SP, Brazil
| | - Evandro L Duarte
- Instituto de Física, Universidade de São Paulo, CP 66318, CEP 05315-970 São Paulo, SP, Brazil
| | - Karin A Riske
- Departamento de Biofísica, Escola Paulista de Medicina, Universidade Federal de São Paulo, R. Botucatu 862, 04023-062 São Paulo, SP, Brazil
| | - M Teresa Lamy
- Instituto de Física, Universidade de São Paulo, CP 66318, CEP 05315-970 São Paulo, SP, Brazil
| | - Julio H K Rozenfeld
- Departamento de Biofísica, Escola Paulista de Medicina, Universidade Federal de São Paulo, R. Botucatu 862, 04023-062 São Paulo, SP, Brazil.
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7
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Rozenfeld JHK, Duarte EL, Oliveira TR, Lamy MT. Structural insights on biologically relevant cationic membranes by ESR spectroscopy. Biophys Rev 2017; 9:633-647. [PMID: 28836112 PMCID: PMC5662045 DOI: 10.1007/s12551-017-0304-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2017] [Accepted: 07/28/2017] [Indexed: 12/26/2022] Open
Abstract
Cationic bilayers have been used as models to study membrane fusion, templates for polymerization and deposition of materials, carriers of nucleic acids and hydrophobic drugs, microbicidal agents and vaccine adjuvants. The versatility of these membranes depends on their structure. Electron spin resonance (ESR) spectroscopy is a powerful technique that employs hydrophobic spin labels to probe membrane structure and packing. The focus of this review is the extensive structural characterization of cationic membranes prepared with dioctadecyldimethylammonium bromide or diC14-amidine to illustrate how ESR spectroscopy can provide important structural information on bilayer thermotropic behavior, gel and fluid phases, phase coexistence, presence of bilayer interdigitation, membrane fusion and interactions with other biologically relevant molecules.
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Affiliation(s)
- Julio H K Rozenfeld
- Departamento de Biofísica, Escola Paulista de Medicina, Universidade Federal de São Paulo, R. Botucatu 862, São Paulo, SP, 04023-062, Brazil
| | - Evandro L Duarte
- Instituto de Física, Universidade de São Paulo, R. do Matão 1371, São Paulo, SP, 05508-090, Brazil
| | - Tiago R Oliveira
- Centro de Engenharia, Modelagem e Ciências Sociais Aplicadas, Universidade Federal do ABC, R. Arcturus (Jd Antares), São Bernardo do Campo, SP, Brazil
| | - M Teresa Lamy
- Instituto de Física, Universidade de São Paulo, R. do Matão 1371, São Paulo, SP, 05508-090, Brazil.
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8
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Nelson J, Diehl II, Palfreeman AF, Gibby J, Bell JD. Ultraslow dynamics of a complex amphiphile within the phospholipid bilayer: Effect of the lipid pre-transition. BIOCHIMICA ET BIOPHYSICA ACTA. BIOMEMBRANES 2017; 1859:2068-2075. [PMID: 28751091 DOI: 10.1016/j.bbamem.2017.07.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Revised: 07/01/2017] [Accepted: 07/23/2017] [Indexed: 06/07/2023]
Abstract
The shape and intensity of fluorescence emission spectra of Merocyanine 540 embedded in dipalmitoylphosphatidylcholine bilayers differ depending on the thermal history of the sample. This apparent hysteresis in fluorescence emission was most prominent in the temperature range of 20 to 35°C. Analysis of kinetic and temperature cycling experiments suggested that Merocyanine 540 slowly (half time of about 30min) assumes a metastable configuration as temperature is raised above the phospholipid pre-transition point. When the sample was cooled below the pre-transition temperature, the metastable state slowly depopulated (half time of about 15min). The rate of merocyanine exchange among these states was influenced more by membrane lipid mobility than by lipid order since cholesterol increased the rate of transition to the metastable state by a factor of 11.
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Affiliation(s)
- Jennifer Nelson
- Department of Physiology and Developmental Biology, Brigham Young University, United States
| | - Izadora I Diehl
- Department of Physiology and Developmental Biology, Brigham Young University, United States
| | - Alyssa F Palfreeman
- Department of Physiology and Developmental Biology, Brigham Young University, United States
| | - Jared Gibby
- Department of Physiology and Developmental Biology, Brigham Young University, United States
| | - John D Bell
- Department of Physiology and Developmental Biology, Brigham Young University, United States.
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9
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Luna ACDL, Saraiva GKV, Filho OMR, Chierice GO, Neto SC, Cuccovia IM, Maria DA. Potential antitumor activity of novel DODAC/PHO-S liposomes. Int J Nanomedicine 2016; 11:1577-91. [PMID: 27143880 PMCID: PMC4841408 DOI: 10.2147/ijn.s90850] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
In recent studies, we showed that synthetic phosphoethanolamine (PHO-S) has a great potential for inducing cell death in several tumor cell lines without damage to normal cells. However, its cytotoxic effect and selectivity against tumor cells could increase with encapsulation in cationic liposomes, such as dioctadecyldimethylammonium chloride (DODAC), due to electrostatic interactions between these liposomes and tumor cell membranes. Our aim was to use cationic liposomes to deliver PHO-S and to furthermore maximize the therapeutic effect of this compound. DODAC liposomes containing PHO-S (DODAC/PHO-S), at concentrations of 0.3-2.0 mM, prepared by ultrasonication, were analyzed by scanning electron microscopy (SEM) and dynamic light scattering. The cytotoxic effect of DODAC/PHO-S on B16F10 cells, Hepa1c1c7 cells, and human umbilical vein endothelial cells (HUVECs) was assessed by MTT assay. Cell cycle phases of B16F10 cells were analyzed by flow cytometry and the morphological changes by SEM, after treatment. The liposomes were spherical and polydisperse in solution. The liposomes were stable, presenting an average of ∼ 50% of PHO-S encapsulation, with a small reduction after 40 days. DODAC demonstrated efficient PHO-S delivery, with the lowest values of IC50% (concentration that inhibits 50% of the growth of cells) for tumor cells, compared with PHO-S alone, with an IC50% value of 0.8 mM for B16F10 cells and 0.2 mM for Hepa1c1c7 cells, and without significant effects on endothelial cells. The Hepa1c1c7 cells showed greater sensitivity to the DODAC/PHO-S formulation when compared to B16F10 cells and HUVECs. The use of DODAC/PHO-S on B16F10 cells induced G2/M-phase cell cycle arrest, with the proportion significantly greater than that treated with PHO-S alone. The morphological analysis of B16F10 cells by SEM showed changes such as "bleb" formation, cell detachment, cytoplasmic retraction, and apoptotic bodies after DODAC/PHO-S treatment. Cationic liposomal formulation for PHO-S delivery promoted cytotoxicity more selectively and effectively against B16F10 and Hepa1c1c7 cells. Thus, the DODAC/PHO-S liposomal formulation presents great potential for preclinical studies.
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Affiliation(s)
- Arthur Cássio de Lima Luna
- Biochemistry and Biophysical Laboratory, Butantan Institute, University of Sao Paulo, Sao Paulo, Brazil; Department of Medical Sciences, Medical School, University of Sao Paulo, Sao Paulo, Brazil
| | | | | | | | - Salvador Claro Neto
- Department of Chemistry and Molecular Physics, University of Sao Paulo, Sao Carlos, Brazil
| | - Iolanda Midea Cuccovia
- Department of Biochemistry, Institute of Chemistry, University of Sao Paulo, Sao Paulo, Brazil
| | - Durvanei Augusto Maria
- Biochemistry and Biophysical Laboratory, Butantan Institute, University of Sao Paulo, Sao Paulo, Brazil; Department of Medical Sciences, Medical School, University of Sao Paulo, Sao Paulo, Brazil
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10
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Lin L, Wang X, Guo Y, Ren K, Li X, Jing L, Yue X, Zhang Q, Dai Z. Hybrid bicelles as a pH-sensitive nanocarrier for hydrophobic drug delivery. RSC Adv 2016. [DOI: 10.1039/c6ra18112k] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Stabilized disc-like hybrid bicelles provide pH-sensitive release, preferable cellular uptake, tumor accumulation and therapeutic effect in vitro and in vivo.
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Affiliation(s)
- Li Lin
- School of Life Science and Technology
- School of Municipal and Environmental Engineering
- Harbin Institute of Technology
- Harbin 150001
- China
| | - Xiaoyou Wang
- Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery System
- College of Engineering
- School of Pharmaceutical Sciences
- Peking University
- Beijing 100191
| | - Yanyu Guo
- School of Life Science and Technology
- School of Municipal and Environmental Engineering
- Harbin Institute of Technology
- Harbin 150001
- China
| | - Kuan Ren
- School of Life Science and Technology
- School of Municipal and Environmental Engineering
- Harbin Institute of Technology
- Harbin 150001
- China
| | - Xiaoda Li
- School of Life Science and Technology
- School of Municipal and Environmental Engineering
- Harbin Institute of Technology
- Harbin 150001
- China
| | - Lijia Jing
- School of Life Science and Technology
- School of Municipal and Environmental Engineering
- Harbin Institute of Technology
- Harbin 150001
- China
| | - Xiuli Yue
- School of Life Science and Technology
- School of Municipal and Environmental Engineering
- Harbin Institute of Technology
- Harbin 150001
- China
| | - Qiang Zhang
- Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery System
- College of Engineering
- School of Pharmaceutical Sciences
- Peking University
- Beijing 100191
| | - Zhifei Dai
- Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery System
- College of Engineering
- School of Pharmaceutical Sciences
- Peking University
- Beijing 100191
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11
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Rozenfeld JHK, Duarte EL, Barbosa LRS, Lamy MT. The effect of an oligonucleotide on the structure of cationic DODAB vesicles. Phys Chem Chem Phys 2015; 17:7498-506. [PMID: 25706300 DOI: 10.1039/c4cp05652c] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The effect of a small single-stranded oligonucleotide (ODN) on the structure of cationic DODAB vesicles was investigated by means of differential scanning calorimetry (DSC), small angle X-ray scattering (SAXS) and electron spin resonance (ESR) spectroscopy. ODN adsorption induced coalescence of vesicles and formation of multilamellar structures with close contact between lamellae. It also increased the phase transition temperature by 10 °C but decreased transition cooperativity. The ODN rigidified and stabilized the gel phase. In the fluid phase, a simultaneous decrease of ordering close to the bilayer surface and increase in bilayer core rigidity was observed in the presence of the ODN. These effects may be due not only to electrostatic shielding of DODAB head groups but also to superficial dehydration of the bilayers. The data suggest that oligonucleotides may induce the formation of a multilamellar poorly hydrated coagel-like phase below phase transition. These effects should be taken into account when planning ODN delivery employing cationic bilayer carriers.
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12
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Man D, Olchawa R. Two-step impact of Amphotericin B (AmB) on lipid membranes: ESR experiment and computer simulations. J Liposome Res 2013; 23:327-35. [PMID: 23855330 DOI: 10.3109/08982104.2013.814139] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
In this study, the electron spin resonance (ESR) method was used to examine the effect of Amphotericin B (AmB) molecules on the fluidity of model membranes made of dipalmitoylphosphatidylcholine (DPPC). The changes occurring under increased AmB concentrations in the spectroscopic parameters of spin probes placed in liposomes were determined. Three probes were used, penetrating the membrane at different depths which allowed the changes in its fluidity to be found in the transverse section. A computer model of the surface layer of membrane, with AmB admixture, was developed and subjected to computer simulation. The effect of changing concentration of the admixture on the binding energy in the system of dipoles representing the surface of the membrane was examined. The ESR studies showed that the process of accumulation of AmB molecules in the membrane has two stages, marked by local maxima in the ESR spectra. The first appears for concentrations of ca. 0.25-0.5% and the second appears for ca. 2.5-3% AmB of its molar ratio to DPPC. The computer simulations permitted reconstructing the two-stage mechanism of interaction between the molecules and the membrane. They demonstrated that, at low concentrations, the AmB molecules position themselves flat on the membrane surface. After the threshold concentration is exceeded, they re-orientate to a vertical position. This process leads to the perforation of the membrane.
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Affiliation(s)
- Dariusz Man
- Institute of Physics, Opole University , Opole , Poland
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Zhang W, Sun J, He Z. The application of open disk-like structures as model membrane and drug carriers. Asian J Pharm Sci 2013. [DOI: 10.1016/j.ajps.2013.07.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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Aqueous dispersions of DMPG in low salt contain leaky vesicles. Chem Phys Lipids 2012; 165:169-77. [DOI: 10.1016/j.chemphyslip.2011.12.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2011] [Accepted: 12/13/2011] [Indexed: 11/24/2022]
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