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Nazar MF, Yasir Siddique M, Saleem MA, Zafar M, Nawaz F, Ashfaq M, Khan AM, Abd Ur Rahman HM, Tahir MB, Mat Lazim A. Fourth-Generation Antibiotic Gatifloxacin Encapsulated by Microemulsions: Structural and Probing Dynamics. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:10603-10612. [PMID: 30109940 DOI: 10.1021/acs.langmuir.8b01775] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
To overcome the increased disease rate, utilization of the versatile broad spectrum antibiotic drugs in controlled drug-delivery systems has been a challenging and complex consignment. However, with the development of microemulsion (μE)-based formulations, drugs can be effectively encapsulated and transferred to the target source. Herein, two biocompatible oil-in-water (o/w) μE formulations comprising clove oil/Tween 20/ethylene glycol/water (formulation A) and clove oil/Tween 20/1-butanol/water (formulation B) were developed for encapsulating the gatifloxacin (GTF), a fourth-generation antibiotic. The pseudoternary phase diagrams were mapped at a constant surfactant/co-surfactant (1:1) ratio to bound the existence of a monophasic isotropic region for as-formulated μEs. Multiple complementary characterization techniques, namely, conductivity (σ), viscosity (η), and optical microscopy analyses, were used to study the gradual changes that occurred in the microstructure of the as-formulated μEs, indicating the presence of a percolation transformation to a bicontinuous permeate flow. GTF showed good solubility, 3.2 wt % at pH 6.2 and 4.0 wt % at pH 6.8, in optimum μE of formulation A and formulation B, respectively. Each loaded μE formulation showed long-term stability over 8 months of storage. Moreover, no observable aggregation of GTF was found, as revealed by scanning transmission electron microscopy and peak-to-peak correlation of IR analysis, indicating the stability of GTF inside the formulation. The average particle size of each μE, measured by dynamic light scattering, increased upon loading GTF, intending the accretion of drug in the interfacial layers of microdomains. Likewise, fluorescence probing sense an interfacial hydrophobic environment to GTF molecules in any of the examined formulations, which may be of significant interest for understanding the kinetics of drug release.
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Affiliation(s)
| | | | | | | | - Faisal Nawaz
- Department of Basic Sciences and Humanities , University of Engineering and Technology Lahore (Faisalabad Campus) , Faisalabad 54890 , Pakistan
| | | | - Asad Muhammad Khan
- Department of Chemistry , COMSATS Institute of Information Technology , Abbottabad 22060 , Pakistan
| | | | | | - Azwan Mat Lazim
- School of Chemical Sciences and Food Technology, Faculty of Science and Technology , University Kebangsaan Malaysia , Bangi 43600 , Selangor , Malaysia
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Lu J, Pan J, Chai J, Zhu M, Chai Z, Zhang X, Cui X. Interfacial composition and solubilization of microemulsion systems containing mixed surfactants C12mimBr and Brij35: effects of surfactant composition, temperature, and salinity. Colloid Polym Sci 2018. [DOI: 10.1007/s00396-018-4334-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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53
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Awad TS, Asker D, Romsted LS. Evidence of coexisting microemulsion droplets in oil-in-water emulsions revealed by 2D DOSY 1H NMR. J Colloid Interface Sci 2018; 514:83-92. [DOI: 10.1016/j.jcis.2017.12.024] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 12/03/2017] [Accepted: 12/04/2017] [Indexed: 12/16/2022]
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Nascimento DS, Insausti M, Band BSF, Grünhut M. Photolysis study of octyl p-methoxycinnamate loaded microemulsion by molecular fluorescence and chemometric approach. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 191:277-282. [PMID: 29049974 DOI: 10.1016/j.saa.2017.10.025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Revised: 10/05/2017] [Accepted: 10/09/2017] [Indexed: 06/07/2023]
Abstract
Octyl p-methoxycinnamate (OMC) is one of the most widely used sunscreen agents. However, the efficiency of OMC as UV filter over time is affected due to the formation of the cis-isomer which presents a markedly lower extinction coefficient (εcis=12,600L mol-1cm-1 at 291nm) than the original trans-isomer (εtrans=24,000L mol-1cm-1 at 310nm). In this work, a novel carrier for OMC based on an oil-in-water microemulsion is proposed in order to improve the photostability of this sunscreen. The formulation was composed of 29.2% (w/w) of a 3:1 mixture of ethanol (co-surfactant) and decaethylene glycol mono-dodecyl ether (surfactant), 1.5% (w/w) of oleic acid (oil phase) and 69.2% (w/w) of water. This microemulsion was prepared in a simple way, under moderate stirring at 25°C and using acceptable, biocompatible and accessible materials for topical use. OMC was incorporated in the vehicle at a final concentration of 5.0% (w/w), taking into account the maximum permitted levels established by international norms. Then, a photolysis study of the loaded formulation was performed using a continuous flow system. The direct photolysis was monitored over time by molecular fluorescence. The recorded spectra data between 370 y 490nm were analyzed by multivariate curve resolution-alternating least squares algorithm. The kinetic rate constants corresponding to the photolysis of the trans-OMC were calculated from the concentration profiles, resulting in 0.0049s-1 for the trans-OMC loaded microemulsion and 0.0131s-1 for the trans-OMC in aqueous media. These results demonstrate a higher photostability of the trans-OMC when loaded in the proposed vehicle with respect to the free trans-OMC in aqueous media.
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Affiliation(s)
- Danielle Silva Nascimento
- INQUISUR (UNS-CONICET), Department of Chemistry, Universidad Nacional del Sur, 1253, Alem Avenue, B8000CPB, Bahía Blanca, Argentina
| | - Matías Insausti
- INQUISUR (UNS-CONICET), Department of Chemistry, Universidad Nacional del Sur, 1253, Alem Avenue, B8000CPB, Bahía Blanca, Argentina
| | - Beatriz Susana Fernández Band
- INQUISUR (UNS-CONICET), Department of Chemistry, Universidad Nacional del Sur, 1253, Alem Avenue, B8000CPB, Bahía Blanca, Argentina
| | - Marcos Grünhut
- INQUISUR (UNS-CONICET), Department of Chemistry, Universidad Nacional del Sur, 1253, Alem Avenue, B8000CPB, Bahía Blanca, Argentina.
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55
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Zang J, Feng M, Zhao J, Wang J. Micellar and bicontinuous microemulsion structures show different solute–solvent interactions: a case study using ultrafast nonlinear infrared spectroscopy. Phys Chem Chem Phys 2018; 20:19938-19949. [DOI: 10.1039/c8cp01024b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Using aqueous and organic probes to simultaneously explore the structural dynamics of reverse micellar and bicontinuous microemulsion structures.
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Affiliation(s)
- Jinger Zang
- Beijing National Laboratory for Molecular Sciences
- Molecular Reaction Dynamics Laboratory
- CAS Research/Education Center for Excellence in Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Minjun Feng
- Beijing National Laboratory for Molecular Sciences
- Molecular Reaction Dynamics Laboratory
- CAS Research/Education Center for Excellence in Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Juan Zhao
- Beijing National Laboratory for Molecular Sciences
- Molecular Reaction Dynamics Laboratory
- CAS Research/Education Center for Excellence in Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Jianping Wang
- Beijing National Laboratory for Molecular Sciences
- Molecular Reaction Dynamics Laboratory
- CAS Research/Education Center for Excellence in Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
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Singh M, Kanoujia J, Parashar P, Arya M, Tripathi CB, Sinha VR, Saraf SK, Saraf SA. Augmented bioavailability of felodipine through an α-linolenic acid-based microemulsion. Drug Deliv Transl Res 2017; 8:204-225. [DOI: 10.1007/s13346-017-0453-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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57
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Topical Nano and Microemulsions for Skin Delivery. Pharmaceutics 2017; 9:pharmaceutics9040037. [PMID: 28934172 PMCID: PMC5750643 DOI: 10.3390/pharmaceutics9040037] [Citation(s) in RCA: 184] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 09/11/2017] [Accepted: 09/13/2017] [Indexed: 11/17/2022] Open
Abstract
Nanosystems such as microemulsions (ME) and nanoemulsions (NE) offer considerable opportunities for targeted drug delivery to and via the skin. ME and NE are stable colloidal systems composed of oil and water, stabilised by a mixture of surfactants and cosurfactants, that have received particular interest as topical skin delivery systems. There is considerable scope to manipulate the formulation components and characteristics to achieve optimal bioavailability and minimal skin irritancy. This includes the incorporation of established chemical penetration enhancers to fluidize the stratum corneum lipid bilayers, thus reducing the primary skin barrier and increasing permeation. This review discusses nanosystems with utility in skin delivery and focuses on the composition and characterization of ME and NE for topical and transdermal delivery. The mechanism of skin delivery across the stratum corneum and via hair follicles is reviewed with particular focus on the influence of formulation.
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Mirgorodskaya AB, Mamedov VA, Zakharova LY, Valeeva FG, Mamedova VL, Galimullina VR, Kushnasarova RA, Sinyashin OG. Surfactant solutions for enhancing solubility of new arylquinolin-2-ones. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.07.055] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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59
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Study on the applicability of dynamic light scattering (DLS) to microemulsions including supercritical carbon dioxide-swollen micelles. J Colloid Interface Sci 2017; 499:202-208. [DOI: 10.1016/j.jcis.2017.03.111] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 03/28/2017] [Accepted: 03/28/2017] [Indexed: 11/21/2022]
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60
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Phase equilibria, interfacial, and bulk compositions of microemulsions containing short-chain alcohols studied by an optimum microemulsion dilution method. Colloid Polym Sci 2017. [DOI: 10.1007/s00396-017-4146-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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61
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Li X, Hufnagel S, Xu H, Valdes SA, Thakkar SG, Cui Z, Celio H. Aluminum (Oxy)Hydroxide Nanosticks Synthesized in Bicontinuous Reverse Microemulsion Have Potent Vaccine Adjuvant Activity. ACS APPLIED MATERIALS & INTERFACES 2017; 9:22893-22901. [PMID: 28621928 PMCID: PMC5556926 DOI: 10.1021/acsami.7b03965] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Insoluble aluminum salts such as aluminum (oxy)hydroxide are commonly used as vaccine adjuvants. Recently, there is evidence suggesting that the adjuvant activity of aluminum salt-based materials is tightly related to their physicochemical properties, including nanometer-scale size, shape with long aspect ratio, and low degree of crystallinity. Herein, for the first time, the bicontinuous reverse microemulsion (RM) technique was utilized to synthesize stick-like monodisperse aluminum (oxy)hydroxide nanoparticles with a long aspect ratio of ∼10, length of ∼80 nm, and low degree of crystallinity (denoted as Al-nanosticks). Moreover, the relationship between the physicochemical properties of Al-nanosticks and the bicontinuous RM was discussed. Compared to the commercial Alhydrogel, which contains micrometer-scale aluminum oxyhydroxide particular aggregates with moderate degree of crystallinity, the Al-nanosticks are more effective in adsorbing and delivering antigens (e.g., ovalbumin, OVA) into antigen-presenting cells, activating inflammasomes, and potentiating OVA-specific antibody responses in a mouse model. It is concluded that the aluminum (oxy)hydroxide nanosticks synthesized in the bicontinuous RM are promising new aluminum salt-based vaccine adjuvants.
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Affiliation(s)
- Xu Li
- The University of Texas at Austin, College of Pharmacy, Division of Molecular Pharmaceutics and Drug Delivery, Austin, Texas, U.S.A
| | - Stephanie Hufnagel
- The University of Texas at Austin, College of Pharmacy, Division of Molecular Pharmaceutics and Drug Delivery, Austin, Texas, U.S.A
| | - Haiyue Xu
- The University of Texas at Austin, College of Pharmacy, Division of Molecular Pharmaceutics and Drug Delivery, Austin, Texas, U.S.A
| | - Solange A. Valdes
- The University of Texas at Austin, College of Pharmacy, Division of Molecular Pharmaceutics and Drug Delivery, Austin, Texas, U.S.A
| | - Sachin G. Thakkar
- The University of Texas at Austin, College of Pharmacy, Division of Molecular Pharmaceutics and Drug Delivery, Austin, Texas, U.S.A
| | - Zhengrong Cui
- The University of Texas at Austin, College of Pharmacy, Division of Molecular Pharmaceutics and Drug Delivery, Austin, Texas, U.S.A
- Inner Mongolia Medical University, Inner Mongolia Key Laboratory of Molecular Biology, Hohhot, Inner Mongolia, China
| | - Hugo Celio
- The University of Texas at Austin, Texas Materials Institute, Austin, Texas, U.S.A
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Abstract
Microemulsions (MEs) are thermodynamic stable dispersion of oily phase and aqueous phase stabilized by surfactants and co-surfactants, and are a small droplet size of less than 100 nm. MEs are appropriate systems for ocular drug delivery because they improve ocular drug retention, extended duration of action, high ocular absorption, permeation of loaded drugs and effortlessness of preparation and administration. This review is an effort to summarize the recent development in the area of MEs, self-emulsifying drug delivery systems, which are examined in relation to their uses in ocular drug delivery. The noteworthy patent, toxicity and stability issues related to these ME systems are also explored here.
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63
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Hayashi K, Iwai H, Kamei T, Iwamoto K, Shimanouchi T, Fujita S, Nakamura H, Umakoshi H. Tailor-made drug carrier: Comparison of formation-dependent physicochemical properties within self-assembled aggregates for an optimal drug carrier. Colloids Surf B Biointerfaces 2017; 152:269-276. [DOI: 10.1016/j.colsurfb.2017.01.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Revised: 12/30/2016] [Accepted: 01/07/2017] [Indexed: 10/20/2022]
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64
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Neubauer R, Höhn S, Dulle M, Lapp A, Schulreich C, Hellweg T. Protein diffusion in a bicontinuous microemulsion: inducing sub-diffusion by tuning the water domain size. SOFT MATTER 2017; 13:1998-2003. [PMID: 28197579 DOI: 10.1039/c6sm02107g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We study the diffusion of an enhanced green fluorescent protein (GFP+) in bicontinuous sugar-surfactant based microemulsions. The size of the water domains in such systems is controlled by changes of the oil-to-water ratio. Hence, microemulsions allow to produce confinement effects in a controlled way. At high water content the protein is found to exhibit Fickian diffusion. Decreasing the water domain size leads to a slowing down of the protein diffusion and sub-diffusive behavior is obtained on the scale observed by fluorescence correlation spectroscopy. Further decrease of the water domain size finally nearly fixes the GFP+ in these domains and forces it to increasingly follow the breathing mode of the microemulsion matrix.
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Affiliation(s)
- Ralph Neubauer
- Universität Bayreuth, Physikalische Chemie I, Universitätsstr. 30, D-95447 Bayreuth, Germany
| | - Sebastian Höhn
- Universität Bayreuth, Physikalische Chemie I, Universitätsstr. 30, D-95447 Bayreuth, Germany and Universität Bielefeld, Physikalische und Biophysikalische Chemie, Universitätsstr. 25, D-33615 Bielefeld, Germany.
| | - Martin Dulle
- Universität Bayreuth, Physikalische Chemie I, Universitätsstr. 30, D-95447 Bayreuth, Germany
| | - Alain Lapp
- Laboratoire Léon Brillouin, CE Saclay, Gif sur Yvette, France
| | - Christoph Schulreich
- Universität Bielefeld, Physikalische und Biophysikalische Chemie, Universitätsstr. 25, D-33615 Bielefeld, Germany.
| | - Thomas Hellweg
- Universität Bielefeld, Physikalische und Biophysikalische Chemie, Universitätsstr. 25, D-33615 Bielefeld, Germany.
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65
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Poomanee W, Chaiyana W, Randall Wickett R, Leelapornpisid P. Stability and solubility improvement of Sompoi ( Acacia concinna Linn.) pod extract by topical microemulsion. Asian J Pharm Sci 2017; 12:386-393. [PMID: 32104350 PMCID: PMC7032130 DOI: 10.1016/j.ajps.2017.03.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Revised: 02/15/2017] [Accepted: 03/07/2017] [Indexed: 11/06/2022] Open
Abstract
The aim of this study was to enhance the solubility and stability of Acacia concinna extract by loading in a microemulsion for topical application. Both physical appearance and biological activities of the extract-loaded microemulsion were determined in comparison with the extract solution. Pseudoternary phase diagrams of three oil types including tea seed oil, grape seed oil, and sesame oil, together with polysorbate 85 or the mixture of polysorbate 85 and sorbitan oleate as surfactants, and absolute ethanol as a co-surfactant were constructed to optimize the microemulsion area. The selected microemulsion was then characterized for droplet size, polydispersity index, and viscosity. Tea seed oil exhibited the highest microemulsion area in the phase diagram because it had the highest unsaturated fatty acid content. The microemulsion composed of tea seed oil (5%), polysorbate 85 (40%), ethanol (20%), and water (35%) exhibited Newtonian flow behavior with the droplet size and polydispersity index of 68.03 ± 1.09 nm and 0.44 ± 0.04, respectively. After 4% w/w of the extract was incorporated into the microemulsion, larger droplets size was observed (239.77 ± 12.69 nm) with a lower polydispersity index (0.37 ± 0.02). After storage in various conditions, both physical appearances and the stability of biological activity of the extract-loaded microemulsion were improved compared to the solution. Therefore, the A. concinna loaded microemulsion may be a promising carrier for further development into a topical formulation and clinical trials for pharmaceutical and cosmeceutical applications are also suggested.
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Affiliation(s)
| | - Wantida Chaiyana
- Faculty of Pharmacy, Chiang Mai University, Chiang Mai, Thailand
| | - R Randall Wickett
- James L. Winkle College of Pharmacy, University of Cincinnati, Cincinnati, USA
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66
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Nazar MF, Saleem MA, Bajwa SN, Yameen B, Ashfaq M, Zafar MN, Zubair M. Encapsulation of Antibiotic Levofloxacin in Biocompatible Microemulsion Formulation: Insights from Microstructure Analysis. J Phys Chem B 2017; 121:437-443. [PMID: 28006901 DOI: 10.1021/acs.jpcb.6b09326] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Microemulsions (μEs) are unique systems that offer exciting perspectives in biophysical research for mimicing biomembranes at the molecular level. In the present study, biocompatible μE formulation of a new oil-in-water (o/w) system comprising clove oil/Tween 20/2-propanol/water was accomplished for encapsulating an antibiotic, levofloxacin (LVF). The pseudoternary phase diagram was delineated at a constant cosurfactant/surfactant (2:1) ratio to meet the economic feasibility. The gradual changes occurring in the microstructure of the as-formulated four-component μEs were explored via multiple complementary characterization techniques. The results of electrical conductivity (σ), viscosity (η), and optical microscopic measurements suggested the existence of a percolation transition to a bicontinuous structure in the microregions of the as-formulated μE. LVF displayed a high solubility (5.0 wt %) at the pH of 6.9 in an optimum μE formulation comprising 2-propanol (36.4%), Tween 20 (18.2%), clove oil (20.7%), and water (24.7%). The LVF-loaded μE composition showed long-term stability for over 6 months of storage. Fourier transform IR analysis showed that LVF was stable inside the μE formulation, indicating the absence of any possible aggregation of LVF. Dynamic light scattering revealed that the average particle size of drug-free μE (64.5 ± 3.4 nm) increases to 129.7 ± 5.8 nm upon loading of LVF, suggesting the accumulation of LVF in the interfacial layers of the micelles. Moreover, fluorescence measurements indicated that LVF might be localized in the interfacial film of μE system, which may result in a controlled release of drug.
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Affiliation(s)
| | | | - Sana Nawaz Bajwa
- Department of Chemistry, University of Gujrat , Gujrat 50700, Pakistan
| | - Basit Yameen
- Department of Chemistry, Syed Babar Ali School of Science and Engineering (SBASSE), Lahore University of Management Sciences (LUMS) , Lahore 54790, Pakistan
| | - Muhammad Ashfaq
- Department of Chemistry, University of Gujrat , Gujrat 50700, Pakistan
| | | | - Muhammad Zubair
- Department of Chemistry, University of Gujrat , Gujrat 50700, Pakistan
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67
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Zhao X, Wang Z, Yuan S, Lu J, Wang Z. MesoDyn prediction of a pharmaceutical microemulsion self-assembly consistent with experimental measurements. RSC Adv 2017. [DOI: 10.1039/c7ra01541k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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68
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Wolf S, Feldmann C. Mikroemulsionen: neue Möglichkeiten zur Erweiterung der Synthese anorganischer Nanopartikel. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201604263] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Silke Wolf
- Institut für Anorganische Chemie; Karlsruher Institut für Technologie (KIT); Engesserstraße 15 76131 Karlsruhe Deutschland
| | - Claus Feldmann
- Institut für Anorganische Chemie; Karlsruher Institut für Technologie (KIT); Engesserstraße 15 76131 Karlsruhe Deutschland
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69
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Wolf S, Feldmann C. Microemulsions: Options To Expand the Synthesis of Inorganic Nanoparticles. Angew Chem Int Ed Engl 2016; 55:15728-15752. [DOI: 10.1002/anie.201604263] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Indexed: 12/16/2022]
Affiliation(s)
- Silke Wolf
- Institut für Anorganische Chemie; Karlsruhe Institute of Technology (KIT); Engesserstrasse 15 76131 Karlsruhe Germany
| | - Claus Feldmann
- Institut für Anorganische Chemie; Karlsruhe Institute of Technology (KIT); Engesserstrasse 15 76131 Karlsruhe Germany
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70
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Pereira TC, Conceição CAF, Khan A, Fernandes RMT, Ferreira MS, Marques EP, Marques ALB. Application of electrochemical impedance spectroscopy: A phase behavior study of babassu biodiesel-based microemulsions. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2016; 168:60-64. [PMID: 27276278 DOI: 10.1016/j.saa.2016.05.034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2016] [Revised: 05/19/2016] [Accepted: 05/22/2016] [Indexed: 06/06/2023]
Abstract
Microemulsions are thermodynamically stable systems of two immiscible liquids, one aqueous and the other of organic nature, with a surfactant and/or co-surfactant adsorbed in the interface between the two phases. Biodiesel-based microemulsions, consisting of alkyl esters of fatty acids, open a new means of analysis for the application of electroanalytical techniques, and is advantageous as it eliminates the required pre-treatment of a sample. In this work, the phase behaviours of biodiesel-based microemulsions were investigated through the electrochemical impedance spectroscopy (EIS) technique. We observed thatan increase in the amount of biodiesel in the microemulsion formulation increases the resistance to charge transfer at the interface. Also, the electrical conductivity measurements revealed that a decrease or increase in electrical properties depends on the amount of biodiesel. EIS studies of the biodiesel-based microemulsion samples showed the presence of two capacitive arcs: one high-frequency and the other low-frequency. Thus, the formulation of microemulsions plays an important role in estimating the electrical properties through the electrochemical impedance spectroscopy technique.
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Affiliation(s)
- Thulio C Pereira
- Laboratório de Pesquisa em Química Analítica, Universidade Federal do Maranhão, 65085-580 São Luís, Maranhão, Brazil
| | - Carlos A F Conceição
- Laboratório de Pesquisa em Química Analítica, Universidade Federal do Maranhão, 65085-580 São Luís, Maranhão, Brazil
| | - Alamgir Khan
- Departamento de Química e Biologia, Universidade Estadual do Maranhão, 65055-970 São Luís, Maranhão, Brazil
| | - Raquel M T Fernandes
- Departamento de Química e Biologia, Universidade Estadual do Maranhão, 65055-970 São Luís, Maranhão, Brazil
| | - Maira S Ferreira
- Coordenação de Ciência e Tecnologia, Universidade Federal do Maranhão, 65085-580 São Luís, Maranhão, Brazil.
| | - Edmar P Marques
- Laboratório de Pesquisa em Química Analítica, Universidade Federal do Maranhão, 65085-580 São Luís, Maranhão, Brazil
| | - Aldaléa L B Marques
- Laboratório de Pesquisa em Química Analítica, Universidade Federal do Maranhão, 65085-580 São Luís, Maranhão, Brazil
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71
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Wang WT, Wang M, Zhang J, Liu H, Pan HC. Cloud point thermodynamics of paclitaxel-loaded microemulsion in the presence of glucose and NaCl. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.07.086] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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72
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Kuchlyan J, Kundu N, sarkar N. Ionic liquids in microemulsions: Formulation and characterization. Curr Opin Colloid Interface Sci 2016. [DOI: 10.1016/j.cocis.2016.05.011] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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73
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Xavier-Junior FH, Huang N, Vachon JJ, Rehder VLG, do Egito EST, Vauthier C. Match of Solubility Parameters Between Oil and Surfactants as a Rational Approach for the Formulation of Microemulsion with a High Dispersed Volume of Copaiba Oil and Low Surfactant Content. Pharm Res 2016; 33:3031-3043. [PMID: 27599989 DOI: 10.1007/s11095-016-2025-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2016] [Accepted: 08/16/2016] [Indexed: 11/28/2022]
Abstract
PURPOSE Aim was to formulate oil-in-water (O/W) microemulsion with a high volume ratio of complex natural oil, i.e. copaiba oil and low surfactant content. The strategy of formulation was based on (i) the selection of surfactants based on predictive calculations of chemical compatibility between their hydrophobic moiety and oil components and (ii) matching the HLB of the surfactants with the required HLB of the oil. METHOD Solubility parameters of the hydrophobic moiety of the surfactants and of the main components found in the oil were calculated and compared. In turn, required HLB of oils were calculated. Selection of surfactants was achieved matching their solubility parameters with those of oil components. Blends of surfactants were prepared with HLB matching the required HLB of the oils. Oil:water mixtures (15:85 and 25:75) were the titrated with surfactant blends until a microemulsion was formed. RESULTS Two surfactant blends were identified from the predictive calculation approach. Microemulsions containing up to 19.6% and 13.7% of selected surfactant blends were obtained. CONCLUSION O/W microemulsions with a high volume fraction of complex natural oil and a reasonable surfactant concentration were formulated. These microemulsions can be proposed as delivery systems for the oral administration of poorly soluble drugs.
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Affiliation(s)
- Francisco Humberto Xavier-Junior
- Université Paris-Sud, Institut Galien Paris Sud - UMR CNRS 8612 - Faculté de Pharmacie, 92296, Chatenay-Malabry Cedex, France.,Universidade Federal do Rio Grande do Norte, Centro de Ciências da Saúde, Departamento de Farmácia, Laboratório de Sistemas Dispersos (LaSiD), Av. Gal. Gustavo Cordeiro de Farias, S/N, Petrópolis, 59010-180, Natal, RN, Brazil
| | - Nicolas Huang
- Université Paris-Sud, Institut Galien Paris Sud - UMR CNRS 8612 - Faculté de Pharmacie, 92296, Chatenay-Malabry Cedex, France
| | - Jean-Jacques Vachon
- Université Paris-Sud, Institut Galien Paris Sud - UMR CNRS 8612 - Faculté de Pharmacie, 92296, Chatenay-Malabry Cedex, France
| | - Vera Lucia Garcia Rehder
- Universidade Estadual de Campinas (UNICAMP) - Centro Pluridisciplinar de Pesquisas Químicas, Biológicas e Agrícolas. Rua Alexandre Cazelatto, 999, Vila Betel, Paulínia, SP, Brazil
| | - Eryvaldo Sócrates Tabosa do Egito
- Universidade Federal do Rio Grande do Norte, Centro de Ciências da Saúde, Departamento de Farmácia, Laboratório de Sistemas Dispersos (LaSiD), Av. Gal. Gustavo Cordeiro de Farias, S/N, Petrópolis, 59010-180, Natal, RN, Brazil
| | - Christine Vauthier
- Université Paris-Sud, Institut Galien Paris Sud - UMR CNRS 8612 - Faculté de Pharmacie, 92296, Chatenay-Malabry Cedex, France.
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74
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Singh M, Kanoujia J, Singh P, Tripathi CB, Arya M, Parashar P, Sinha VR, Saraf SA. Development of an α-linolenic acid containing soft nanocarrier for oral delivery: in vitro and in vivo evaluation. RSC Adv 2016. [DOI: 10.1039/c6ra15166c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Use of α-linolenic acid as an oil phase for microemulsion preparation with synergistic effect of oil in lowering of lipid levels in combination with simvastatin.
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Affiliation(s)
- Mahendra Singh
- Department of Pharmaceutical Sciences
- Babasaheb Bhimrao Ambedkar University (A Central University)
- Lucknow-226025
- India
| | - Jovita Kanoujia
- Department of Pharmaceutical Sciences
- Babasaheb Bhimrao Ambedkar University (A Central University)
- Lucknow-226025
- India
| | - Pooja Singh
- Department of Pharmaceutical Sciences
- Babasaheb Bhimrao Ambedkar University (A Central University)
- Lucknow-226025
- India
| | - Chandra B. Tripathi
- Department of Pharmaceutical Sciences
- Babasaheb Bhimrao Ambedkar University (A Central University)
- Lucknow-226025
- India
| | - Malti Arya
- Department of Pharmaceutical Sciences
- Babasaheb Bhimrao Ambedkar University (A Central University)
- Lucknow-226025
- India
| | - Poonam Parashar
- Department of Pharmaceutical Sciences
- Babasaheb Bhimrao Ambedkar University (A Central University)
- Lucknow-226025
- India
| | - Vivek R. Sinha
- University Institute of Pharmaceutical Sciences
- Panjab University
- Chandigarh-160014 (UT)
- India
| | - Shubhini A. Saraf
- Department of Pharmaceutical Sciences
- Babasaheb Bhimrao Ambedkar University (A Central University)
- Lucknow-226025
- India
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75
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Sun T, Xu C, Chen J. Formation of W/O microemulsions in the extraction of Nd(iii) by bis(2,4,4-trimethylpentyl)dithiophosphinic acid and its effects on Nd(iii) coordination. Dalton Trans 2016; 45:1078-84. [DOI: 10.1039/c5dt03964a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Our work describes the formation of W/O microemulsions and its effect on the coordination environment of Nd(iii) in the extraction using purified Cyanex 301 as an extractant.
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Affiliation(s)
- Taoxiang Sun
- Institute of Nuclear and New Energy Technology
- Beijing Key Lab of Radioactive Waste Treatment
- Collaborative Innovation Center of Advanced Nuclear Energy Technology
- Tsinghua University
- Beijing 100084
| | - Chao Xu
- Institute of Nuclear and New Energy Technology
- Beijing Key Lab of Radioactive Waste Treatment
- Collaborative Innovation Center of Advanced Nuclear Energy Technology
- Tsinghua University
- Beijing 100084
| | - Jing Chen
- Institute of Nuclear and New Energy Technology
- Beijing Key Lab of Radioactive Waste Treatment
- Collaborative Innovation Center of Advanced Nuclear Energy Technology
- Tsinghua University
- Beijing 100084
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76
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Hayashi K, Iwai H, Shimanouchi T, Umakoshi H, Iwasaki T, Kato A, Nakamura H. Formation of lens-like vesicles induced via microphase separations on a sorbitan monoester membrane with different headgroups. Colloids Surf B Biointerfaces 2015; 135:235-242. [DOI: 10.1016/j.colsurfb.2015.07.071] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Revised: 07/23/2015] [Accepted: 07/27/2015] [Indexed: 12/23/2022]
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77
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Investigation of microemulsion microstructure and its impact on skin delivery of flufenamic acid. Int J Pharm 2015; 490:292-7. [PMID: 26022888 DOI: 10.1016/j.ijpharm.2015.05.056] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Revised: 05/19/2015] [Accepted: 05/21/2015] [Indexed: 11/24/2022]
Abstract
Microemulsions are well known penetration enhancing delivery systems. Several properties are described that influence the transdermal delivery of active components. Therefore, this study aimed to characterize fluorosurfactant-based microemulsions and to assess the impact of formulation variables on the transdermal delivery of incorporated flufenamic acid. The microemulsion systems prepared in this study consisted of bistilled water, oleic acid, isopropanol as co-solvent, flufenamic acid as active ingredient and either Hexafor(TM)670 (Hex) or Chemguard S-550-100 (Sin) as fluorosurfactant. Characterization was performed by a combination of techniques including electrical conductivity measurements, small-angle X-ray scattering (SAXS) and nuclear magnetic resonance (NMR) self-diffusion experiments. In vitro skin permeation experiments were performed with each prepared microemulsion using Franz type diffusion cells to correlate their present microstructure with their drug delivery to skin. Electrical conductivity increased with added water content. Consequently, the absence of a conductivity maximum as well as the NMR and SAXS data rather suggest O/W type microemulsions with spherical or rod-like microstructures. Skin permeation data revealed enhanced diffusion for Hex- and Sin-microemulsions if the shape of the structures was rather elongated than spherical implying that the shape of droplets had an essential impact on the skin permeation of flufenamic acid.
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78
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Dynamic and static radiation scattering in a microemulsion as a function of dispersed phase concentration. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2014.10.045] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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79
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Blach D, Pessêgo M, Silber JJ, Correa NM, García-Río L, Falcone RD. Ionic liquids entrapped in reverse micelles as nanoreactors for bimolecular nucleophilic substitution reaction. Effect of the confinement on the chloride ion availability. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:12130-7. [PMID: 25269078 DOI: 10.1021/la501496a] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
In this work was explored how the confinement of two ionic liquids (ILs), 1-butyl-3-methylimidazolium chloride (bmimCl) and 1-butyl-3-methylimidazolium tetrafluoroborate (bmimBF4), inside toluene/benzyl-n-hexadecyldimethylammonium chloride (BHDC) reverse micelles (RMs) affects the Cl(-) nucleophilicity on the bimolecular nucleophilic substitution (SN2) reaction between this anion and dimethyl-4-nitrophenylsulfonium trifluoromethanesulfonate. The results obtained show that, upon confinement, the ionic interactions between the ILs with the cationic surfactant polar head group and the surfactant counterion modify substantially the performance of both ILs as solvents. In toluene/BHDC/bmimCl RMs, the Cl(-) interacts strongly with bmim(+) (and/or BHD(+)) in such a way that its nucleophilicity is reduced in comparison with neat IL. In toluene/BHDC/bmimBF4 RMs, an ionic exchange equilibrium produces segregation of bmim(+) and BF4(-) ions, changing the composition of the RMs interface and affecting dramatically the Cl(-) availability. These results show the versatility of this kind of organized system to alter the ionic organization and influence on reaction rate when used as nanoreactors.
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Affiliation(s)
- Diana Blach
- Departamento de Química, Universidad Nacional de Río Cuarto , Agencia Postal # 3. C.P., X5804BYA Río Cuarto, Argentina
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80
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Sun Y, Yan K, Huang X. Formation, characterization and enzyme activity in water-in-hydrophobic ionic liquid microemulsion stabilized by mixed cationic/nonionic surfactants. Colloids Surf B Biointerfaces 2014; 122:66-71. [DOI: 10.1016/j.colsurfb.2014.06.040] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2014] [Revised: 06/17/2014] [Accepted: 06/19/2014] [Indexed: 10/25/2022]
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81
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Bera MK, Ellis RJ, Burton-Pye BP, Antonio MR. Structural aspects of heteropolyacid microemulsions. Phys Chem Chem Phys 2014; 16:22566-74. [DOI: 10.1039/c4cp03014a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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82
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Zhang J, Peng L, Han B. Amphiphile self-assemblies in supercritical CO2 and ionic liquids. SOFT MATTER 2014; 10:5861-5868. [PMID: 25000970 DOI: 10.1039/c4sm00890a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Supercritical (sc) CO2 and ionic liquids (ILs) are very attractive green solvents with tunable properties. Using scCO2 and ILs as alternatives of conventional solvents (water and oil) for forming amphiphile self-assemblies has many advantages. For example, the properties and structures of the amphiphile self-assemblies in these solvents can be easily modulated by tuning the properties of solvents; scCO2 has excellent solvation power and mass-transfer characteristics; ILs can dissolve both organic and inorganic substances and their properties are designable to satisfy the requirements of various applications. Therefore, the amphiphile self-assemblies in scCO2 and ILs have attracted considerable attention in recent years. This review describes the advances of using scCO2 or/and ILs as amphiphile self-assembly media in the last decade. The amphiphile self-assemblies in scCO2 and ILs are first reviewed, followed by the discussion on combination of scCO2 and ILs in creating microemulsions or emulsions. Some future directions on the amphiphile self-assemblies in scCO2 and ILs are highlighted.
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Affiliation(s)
- Jianling Zhang
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid and Interface and Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, China.
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83
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Hegde RR, Kumar S, Aswal VK, Verma A, Bhattacharya SS, Ghosh A. Small-Angle Neutron Scattering Study of Nonionic Surfactant Micelles and Phase Transitions in w/o Microemulsion. J DISPER SCI TECHNOL 2014. [DOI: 10.1080/01932691.2013.813393] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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84
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Shang W, Kang X, Ning H, Zhang J, Zhang X, Wu Z, Mo G, Xing X, Han B. Shape and size controlled synthesis of MOF nanocrystals with the assistance of ionic liquid mircoemulsions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:13168-13174. [PMID: 24127865 DOI: 10.1021/la402882a] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
In this work, the La-metal-organic frameworks (La-MOFs) were synthesized using lanthanum(III) nitrate and 1,3,5-benzenetricarboxylic acid (BTC) in H2O-in-1-butyl-3-methylimidazolium hexafluorophosphate (bmimPF6), bmimPF6-in-water, and the bicontinuous microemulsions stabilized by surfactant TX-100. The MOFs prepared were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), powder X-ray diffraction (XRD), thermal gravimetric analysis (TGA), and FT-IR methods, and the microstructures of the microemulsions in the H2O/bmimPF6/TX-100 system were studied by small-angle X-ray scattering (SXAS) technique. It was shown that the dispersed droplets in the water-in-bmimPF6, bicontinuous and bmimPF6-in-water microemulsions were spherical, lamellar, and cylindrical, respectively. The shapes of the La-MOFs synthesized were similar to that of the droplets in the corresponding microemulsions. This indicated that the morphology of MOFs could be controlled by the microstructures of the microemulsions. On the basis of the systematic experimental results, the mechanism for controlling the morphology of the MOFs was proposed.
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Affiliation(s)
- Wenting Shang
- CAS Key Laboratory of Colloid and Interface and Thermodynamics, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences , Beijing, China
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85
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Silva AE, Barratt G, Chéron M, Egito EST. Development of oil-in-water microemulsions for the oral delivery of amphotericin B. Int J Pharm 2013; 454:641-8. [PMID: 23726904 DOI: 10.1016/j.ijpharm.2013.05.044] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2013] [Revised: 05/12/2013] [Accepted: 05/16/2013] [Indexed: 01/09/2023]
Abstract
Amphotericin B (AmB) is a very efficient drug against serious diseases such as leishmaniasis and systemic fungal infections. However, its oral bioavailability is limited due to its poor solubility in water. Nevertheless, it is marketed as high-cost lipid parenteral formulations that may induce serious infusion-related side effects. In this study, oil-in-water (O/W) microemulsions (MEs) were developed and characterized with a view to their use as solubility enhancers and oral delivery systems for AmB. Therefore, different nonionic surfactants from the Tween(®) and Span(®) series were tested for their solubilization capacity in combination with several oils. Based on pseudoternary phase diagrams, AmB-loaded MEs with mean droplet sizes about 120 nm were successfully produced. They were able to improve the drug solubility up to 1000-fold. Rheological studies showed the MEs to be low-viscosity formulations with Newtonian behavior. Circular dichroism and absorption spectra revealed that part of the AmB in the MEs was aggregated as an AmB reservoir carrier. Cytotoxicity studies revealed limited toxicity to macrophage-like cells that may allow the formulations to be considered as suitable carriers for AmB.
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Affiliation(s)
- Acarília Eduardo Silva
- Universidade Federal do Rio Grande do Norte, Faculdade Farmácia, Laboratório de Sistemas Dispersos (LASID), Rua Gal. Cordeiro de Farias, S/N, Petrópolis, Zip Code 59010-180 Natal, RN, Brazil.
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86
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Chen M, Yang W, Yin M. Size-controllable synthesis and functionalization of ultrafine polymeric nanoparticles. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2013; 9:2715-2719. [PMID: 23441018 DOI: 10.1002/smll.201203130] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2012] [Indexed: 06/01/2023]
Affiliation(s)
- Mengjun Chen
- State Key Laboratory of Chemical Resource Engineering, Key Laboratory of Carbon Fiber and Functional Polymers, Beijing University of Chemical Technology, 100029 Beijing, China
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87
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Hegde RR, Verma A, Ghosh A. Microemulsion: new insights into the ocular drug delivery. ISRN PHARMACEUTICS 2013; 2013:826798. [PMID: 23936681 PMCID: PMC3712243 DOI: 10.1155/2013/826798] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Accepted: 06/02/2013] [Indexed: 11/18/2022]
Abstract
Delivery of drugs into eyes using conventional drug delivery systems, such as solutions, is a considerable challenge to the treatment of ocular diseases. Drug loss from the ocular surface by lachrymal fluid secretion, lachrymal fluid-eye barriers, and blood-ocular barriers are main obstacles. A number of ophthalmic drug delivery carriers have been made to improve the bioavailability and to prolong the residence time of drugs applied topically onto the eye. The potential use of microemulsions as an ocular drug delivery carrier offers several favorable pharmaceutical and biopharmaceutical properties such as their excellent thermodynamic stability, phase transition to liquid-crystal state, very low surface tension, and small droplet size, which may result in improved ocular drug retention, extended duration of action, high ocular absorption, and permeation of loaded drugs. Further, both lipophilic and hydrophilic characteristics are present in microemulsions, so that the loaded drugs can diffuse passively as well get significantly partitioned in the variable lipophilic-hydrophilic corneal barrier. This review will provide an insight into previous studies on microemulsions for ocular delivery of drugs using various nonionic surfactants, cosurfactants, and associated irritation potential on the ocular surface. The reported in vivo experiments have shown a delayed effect of drug incorporated in microemulsion and an increase in the corneal permeation of the drug.
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Affiliation(s)
- Rahul Rama Hegde
- School of Pharmaceutical Sciences, IFTM University, Lodhipur Rajput, Moradabad 244102, India
| | - Anurag Verma
- School of Pharmaceutical Sciences, IFTM University, Lodhipur Rajput, Moradabad 244102, India
| | - Amitava Ghosh
- Bengal College of Pharmaceutical Sciences & Research, West Bengal, Durgapur 713 212, India
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88
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Mandal S, Ghosh S, Banerjee C, Kuchlyan J, Banik D, Sarkar N. A Novel Ionic Liquid-in-Oil Microemulsion Composed of Biologically Acceptable Components: An Excitation Wavelength Dependent Fluorescence Resonance Energy Transfer Study. J Phys Chem B 2013; 117:3221-31. [DOI: 10.1021/jp4009515] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sarthak Mandal
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, WB, India
| | - Surajit Ghosh
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, WB, India
| | - Chiranjib Banerjee
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, WB, India
| | - Jagannath Kuchlyan
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, WB, India
| | - Debasis Banik
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, WB, India
| | - Nilmoni Sarkar
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, WB, India
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