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de Souza JF, Pontes KDS, Alves TFR, Amaral VA, Rebelo MDA, Hausen MA, Chaud MV. Spotlight on Biomimetic Systems Based on Lyotropic Liquid Crystal. Molecules 2017; 22:E419. [PMID: 28272377 PMCID: PMC6155424 DOI: 10.3390/molecules22030419] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Accepted: 02/28/2017] [Indexed: 12/31/2022] Open
Abstract
The behavior of lyotropic biomimetic systems in drug delivery was reviewed. These behaviors are influenced by drug properties, the initial water content, type of lyotropic liquid crystals (LLC), swell ability, drug loading rate, the presence of ions with higher or less kosmotropic or chaotropic force, and the electrostatic interaction between the drug and the lipid bilayers. The in vivo interaction between LCC-drugs, and the impact on the bioavailability of drugs, was reviewed. The LLC with a different architecture can be formed by the self-assembly of lipids in aqueous medium, and can be tuned by the structures and physical properties of the emulsion. These LLC lamellar phase, cubic phase, and hexagonal phase, possess fascinating viscoelastic properties, which make them useful as a dispersion technology, and a highly ordered, thermodynamically stable internal nanostructure, thereby offering the potential as a sustained drug release matrix for drug delivery. In addition, the biodegradable and biocompatible nature of lipids demonstrates a minimum toxicity and thus, they are used for various routes of administration. This review is not intended to provide a comprehensive overview, but focuses on the advantages over non modified conventional materials and LLC biomimetic properties.
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Affiliation(s)
- Juliana F de Souza
- Laboratory of Biomaterials and Nanotechnology, University of Sorocaba (UNISO), Sorocaba, SP 18078-005, Brazil.
| | - Katiusca da S Pontes
- Laboratory of Biomaterials and Nanotechnology, University of Sorocaba (UNISO), Sorocaba, SP 18078-005, Brazil.
| | - Thais F R Alves
- Laboratory of Biomaterials and Nanotechnology, University of Sorocaba (UNISO), Sorocaba, SP 18078-005, Brazil.
| | - Venâncio A Amaral
- Laboratory of Biomaterials and Nanotechnology, University of Sorocaba (UNISO), Sorocaba, SP 18078-005, Brazil.
| | - Márcia de A Rebelo
- Laboratory of Biomaterials and Nanotechnology, University of Sorocaba (UNISO), Sorocaba, SP 18078-005, Brazil.
| | - Moema A Hausen
- Laboratory of Post-Graduate Program in Biotechnology and Environmental Monitoring (PPGBMA), University of São Carlos (UFSCAR), Sorocaba, SP 18052-780, Brazil.
- Laboratory of Biomaterials (LABIOMAT), Pontificial University Catholic (PUC), Sorocaba, SP 18030-070, Brazil.
| | - Marco V Chaud
- Laboratory of Biomaterials and Nanotechnology, University of Sorocaba (UNISO), Sorocaba, SP 18078-005, Brazil.
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Jia S, Du JD, Hawley A, Fong WK, Graham B, Boyd BJ. Investigation of Donor-Acceptor Stenhouse Adducts as New Visible Wavelength-Responsive Switching Elements for Lipid-Based Liquid Crystalline Systems. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:2215-2221. [PMID: 28099807 DOI: 10.1021/acs.langmuir.6b03726] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The ability of donor-acceptor Stenhouse adducts (DASAs) to function as a green light responsive switch for lipid-based liquid crystalline drug delivery systems was investigated. The host matrix comprising phytantriol cubic phase was selected due to its high sensitivity toward changes in lipid packing. Small-angle X-ray scattering demonstrated that the matrix undergoes rapid and fully reversible order-order phase transitions upon irradiation with 532 nm light, converting between the bicontinuous cubic phase and reversed hexagonal phases. This approach shows promise for use as an actuator for the development of visible wavelength light-activated, "on-demand" drug delivery systems.
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Affiliation(s)
| | | | - Adrian Hawley
- SAXS/WAXS Beamline, Australian Synchrotron, Clayton, VIC, Australia
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53
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Rajabalaya R, Musa MN, Kifli N, David SR. Oral and transdermal drug delivery systems: role of lipid-based lyotropic liquid crystals. DRUG DESIGN DEVELOPMENT AND THERAPY 2017; 11:393-406. [PMID: 28243062 PMCID: PMC5315216 DOI: 10.2147/dddt.s103505] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Liquid crystal (LC) dosage forms, particularly those using lipid-based lyotropic LCs (LLCs), have generated considerable interest as potential drug delivery systems. LCs have the physical properties of liquids but retain some of the structural characteristics of crystalline solids. They are compatible with hydrophobic and hydrophilic compounds of many different classes and can protect even biologicals and nucleic acids from degradation. This review, focused on research conducted over the past 5 years, discusses the structural evaluation of LCs and their effects in drug formulations. The structural classification of LLCs into lamellar, hexagonal and micellar cubic phases is described. The structures of these phases are influenced by the addition of surfactants, which include a variety of nontoxic, biodegradable lipids; these also enhance drug solubility. LLC structure influences drug localization, particle size and viscosity, which, in turn, determine drug delivery properties. Through several specific examples, we describe the applications of LLCs in oral and topical drug formulations, the latter including transdermal and ocular delivery. In oral LLC formulations, micelle compositions and the resulting LLC structures can determine drug solubilization and stability as well as intestinal transport and absorption. Similarly, in topical LLC formulations, composition can influence whether the drug is retained in the skin or delivered transdermally. Owing to their enhancement of drug stability and promotion of controlled drug delivery, LLCs are becoming increasingly popular in pharmaceutical formulations.
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Affiliation(s)
- Rajan Rajabalaya
- PAPRSB Institute of Health Sciences, Universiti Brunei Darussalam, Brunei Darussalam
| | - Muhammad Nuh Musa
- PAPRSB Institute of Health Sciences, Universiti Brunei Darussalam, Brunei Darussalam
| | - Nurolaini Kifli
- PAPRSB Institute of Health Sciences, Universiti Brunei Darussalam, Brunei Darussalam
| | - Sheba R David
- PAPRSB Institute of Health Sciences, Universiti Brunei Darussalam, Brunei Darussalam
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54
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Ali MA, Kataoka N, Ranneh AH, Iwao Y, Noguchi S, Oka T, Itai S. Enhancing the Solubility and Oral Bioavailability of Poorly Water-Soluble Drugs Using Monoolein Cubosomes. Chem Pharm Bull (Tokyo) 2017; 65:42-48. [PMID: 28049915 DOI: 10.1248/cpb.c16-00513] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Monoolein cubosomes containing either spironolactone (SPI) or nifedipine (NI) were prepared using a high-pressure homogenization technique and characterized in terms of their solubility and oral bioavailability. The mean particle size, polydispersity index (PDI), zeta potential, solubility and encapsulation efficiency (EE) values of the SPI- and NI-loaded cubosomes were determined to be 90.4 nm, 0.187, -13.4 mV, 163 µg/mL and 90.2%, and 91.3 nm, 0.168, -12.8 mV, 189 µg/mL and 93.0%, respectively, which were almost identical to those of the blank cubosome. Small-angle X-ray scattering analyses confirmed that the SPI-loaded, NI-loaded and blank cubosomes existed in the cubic space group Im3̄m. The lattice parameters of the SPI- and NI-loaded cubosomes were 147.6 and 151.6 Å, respectively, making them almost identical to that of blank cubosome (151.0 Å). The in vitro release profiles of the SPI- and NI-loaded cubosomes showed that they released less than 5% of the drugs into various media over 12-48 h, indicating that most of the drug remained encapsulated within the cubic phase of their lipid bilayer. Furthermore, the in vivo pharmacokinetic results suggested that these cubosomes led to a considerable increase in the systemic oral bioavailability of the drugs compared with pure dispersions of the same materials. Notably, the stability results indicated that the mean particle size and PDI values of these cubosomes were stable for at least 4 weeks. Taken together, these results demonstrate that monoolein cubosomes represent promising drug carriers for enhancing the solubility and oral bioavailability of poorly water-soluble drugs.
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Affiliation(s)
- Md Ashraf Ali
- Department of Pharmaceutical Engineering & Drug Delivery Science, Graduate School of Integrated Pharmaceutical & Nutritional Sciences, University of Shizuoka
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55
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Lam MT, FitzGerald PA, Warr GG. Hydrophobic Monomer Type and Hydrophilic Monomer Ionization Modulate the Lyotropic Phase Stability of Diblock Co-oligomer Amphiphiles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:1013-1022. [PMID: 28051872 DOI: 10.1021/acs.langmuir.6b03133] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The phase behavior and self-assembly structures of a series of amphiphilic diblock co-oligomers comprising an ionizable hydrophilic block (5 to 10 units of acrylic acid) and a hydrophobic block (5 to 20 units of n-butyl acrylate, t-butyl acrylate, or ethyl acrylate), synthesized by RAFT polymerization, have been examined by polarizing optical microscopy and small-angle X-ray scattering (SAXS). Self-assembled structure and lyotropic phase stability in these systems is highly responsive to the degree of ionization of the acrylic acid hydrophilic block (i.e., pH), concentration, and nature of the hydrophobic block. Increasing headgroup ionization switched the amphiphiles from behaving like soluble to insoluble surfactants. Liquid isotropic (micellar), hexagonal, lamellar, and discrete cubic phases were found under different solution conditions. The surfactant packing parameter was adapted to understand the self-assembly structures in these diblock co-oligomers. The hydrophobic chain structure and length were shown to strongly affect the relative stabilities of these phases, allowing the self-assembled structure to be varied at will.
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Affiliation(s)
- Minh T Lam
- School of Chemistry, The University of Sydney , Sydney NSW 2006, Australia
| | - Paul A FitzGerald
- School of Chemistry, The University of Sydney , Sydney NSW 2006, Australia
| | - Gregory G Warr
- School of Chemistry, The University of Sydney , Sydney NSW 2006, Australia
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56
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Kadhum WR, Sekiguchi S, Hijikuro I, Todo H, Sugibayashi K. A Novel Chemical Enhancer Approach for Transdermal Drug Delivery with C 17-Monoglycerol Ester Liquid Crystal-forming Lipid. J Oleo Sci 2017; 66:443-454. [DOI: 10.5650/jos.ess16204] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
| | | | - Ichiro Hijikuro
- Farnex Incorporated, Tokyo Institute of Technology Yokohama Venture Plaza
| | - Hiroaki Todo
- Faculty of Pharmaceutical Sciences, Josai University
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57
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Radiolytic syntheses of hollow UO2 nanospheres in Triton X-100-based lyotropic liquid crystals. RADIOCHIM ACTA 2016. [DOI: 10.1515/ract-2016-2626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Hollow nanospheres (ϕ: 60–80 nm, wall thickness: 10–20 nm), consisted of UO2 nanoparticles (ϕ: 3–5 nm), were successfully prepared in a Triton X-100-water (50:50, w/w) hexagonal lyotropic liquid crystal (LLC) by γ-irradiation, where water soluble ammonium uranyl tricarbonate was added as precursor. The product was stable at least up to 300°C. Furthermore, whether the nanospheres were hollow or not, and the wall thickness of the hollow nanospheres could be easily controlled via adjusting dose rate. While in the Triton X-100 based micellar systems, only solid nanospheres were obtained. At last, a possible combination mechanism containing adsorption, aggregation and fracturing processes was proposed.
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58
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59
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Freag MS, Elnaggar YS, Abdelmonsif DA, Abdallah OY. Stealth, biocompatible monoolein-based lyotropic liquid crystalline nanoparticles for enhanced aloe-emodin delivery to breast cancer cells: in vitro and in vivo studies. Int J Nanomedicine 2016; 11:4799-4818. [PMID: 27703348 PMCID: PMC5036603 DOI: 10.2147/ijn.s111736] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Recently, research has progressively highlighted on clues from conventional use of herbal medicines to introduce new anticancer drugs. Aloe-emodin (AE) is a herbal drug with promising anticancer activity. Nevertheless, its clinical utility is handicapped by its low solubility. For the first time, this study aims to the fabrication of surface-functionalized polyethylene glycol liquid crystalline nanoparticles (PEG-LCNPs) of AE to enhance its water solubility and enable its anticancer use. Developed AE-PEG-LCNPs were optimized via particle size and zeta potential measurements. Phase behavior, solid state characteristics, hemocompatibility, and serum stability of LCNPs were assessed. Sterile formulations were developed using various sterilization technologies. Furthermore, the potential of the formulations was investigated using cell culture, pharmacokinetics, biodistribution, and toxicity studies. AE-PEG-LCNPs showed particle size of 190 nm and zeta potential of −49.9, and PEGylation approach reduced the monoolein hemolytic tendency to 3% and increased the serum stability of the nanoparticles. Sterilization of liquid and lyophilized AE-PEG-LCNPs via autoclaving and γ-radiations, respectively, insignificantly affected the physicochemical properties of the nanoparticles. Half maximal inhibitory concentration of AE-PEG-LCNPs was 3.6-fold lower than free AE after 48 hours and their cellular uptake was threefold higher than free AE after 24-hour incubation. AE-PEG-LCNPs presented 5.4-fold increase in t1/2 compared with free AE. Biodistribution and toxicity studies showed reduced AE-PEG-LCNP uptake by reticuloendothelial system organs and good safety profile. PEGylated LCNPs could serve as a promising nanocarrier for efficient delivery of AE to cancerous cells.
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Affiliation(s)
- May S Freag
- Department of Pharmaceutics, Faculty of Pharmacy, Alexandria University
| | - Yosra Sr Elnaggar
- Department of Pharmaceutics, Faculty of Pharmacy, Alexandria University; Department of Pharmaceutics, Faculty of Pharmacy and Drug Manufacturing, Pharos University in Alexandria
| | - Doaa A Abdelmonsif
- Department of Medical Biochemistry, Faculty of Medicine, Alexandria University, Alexandria, Egypt
| | - Ossama Y Abdallah
- Department of Pharmaceutics, Faculty of Pharmacy, Alexandria University
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60
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Fonseca-Santos B, Dos Santos AM, Rodero CF, Gremião MPD, Chorilli M. Design, characterization, and biological evaluation of curcumin-loaded surfactant-based systems for topical drug delivery. Int J Nanomedicine 2016; 11:4553-4562. [PMID: 27660447 PMCID: PMC5019438 DOI: 10.2147/ijn.s108675] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
From previous studies, it has been found that curcumin exhibits an anti-inflammatory activity and is being used for the treatment of skin disorders; however, it is hydrophobic and has weak penetrating ability, resulting in poor drug transport through the stratum corneum. The aim of this study was to develop liquid crystalline systems for topical administration of curcumin for the treatment of inflammation. These liquid crystalline systems were developed from oleic acid, polyoxypropylene (5) polyoxyethylene (20) cetyl alcohol, and water as the surfactant, oil phase, and aqueous phase, respectively. These systems were characterized, and polarized light microscopy showed anisotropy with lamellar mesophases (Formulation 1) and hexagonal mesophases (Formulations 2 and 3), which were confirmed by the peak ratio measured using small-angle X-ray scattering. In addition, rheological tests revealed that the formulations exhibited gel-like behavior (G′>G″), as evidenced by the increased G′ values that indicate structured systems. Texture profile analysis showed that hexagonal mesophases have high values of hardness, adhesiveness, and compressibility, which indicate structured systems. In vitro studies on bioadhesion revealed that the hexagonal mesophases increased the bioadhesiveness of the systems to the skin of the pig ear. An in vivo inflammation experiment showed that the curcumin-loaded hexagonal mesophase exhibited an anti-inflammatory activity as compared to the positive control (dexamethasone). The results suggest that this system has a potential to be used as a bioadhesive vehicle for the topical administration of curcumin. Therefore, it is possible to conclude that these systems can be used for the optimization of drug delivery systems to the skin.
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Affiliation(s)
- Bruno Fonseca-Santos
- School of Pharmaceutical Sciences, UNESP - São Paulo State University, Araraquara, São Paulo Brazil
| | - Aline Martins Dos Santos
- School of Pharmaceutical Sciences, UNESP - São Paulo State University, Araraquara, São Paulo Brazil
| | - Camila Fernanda Rodero
- School of Pharmaceutical Sciences, UNESP - São Paulo State University, Araraquara, São Paulo Brazil
| | | | - Marlus Chorilli
- School of Pharmaceutical Sciences, UNESP - São Paulo State University, Araraquara, São Paulo Brazil
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61
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Boge L, Bysell H, Ringstad L, Wennman D, Umerska A, Cassisa V, Eriksson J, Joly-Guillou ML, Edwards K, Andersson M. Lipid-Based Liquid Crystals As Carriers for Antimicrobial Peptides: Phase Behavior and Antimicrobial Effect. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:4217-4228. [PMID: 27033359 DOI: 10.1021/acs.langmuir.6b00338] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The number of antibiotic-resistant bacteria is increasing worldwide, and the demand for novel antimicrobials is constantly growing. Antimicrobial peptides (AMPs) could be an important part of future treatment strategies of various bacterial infection diseases. However, AMPs have relatively low stability, because of proteolytic and chemical degradation. As a consequence, carrier systems protecting the AMPs are greatly needed, to achieve efficient treatments. In addition, the carrier system also must administrate the peptide in a controlled manner to match the therapeutic dose window. In this work, lyotropic liquid crystalline (LC) structures consisting of cubic glycerol monooleate/water and hexagonal glycerol monooleate/oleic acid/water have been examined as carriers for AMPs. These LC structures have the capability of solubilizing both hydrophilic and hydrophobic substances, as well as being biocompatible and biodegradable. Both bulk gels and discrete dispersed structures (i.e., cubosomes and hexosomes) have been studied. Three AMPs have been investigated with respect to phase stability of the LC structures and antimicrobial effect: AP114, DPK-060, and LL-37. Characterization of the LC structures was performed using small-angle X-ray scattering (SAXS), dynamic light scattering, ζ-potential, and cryogenic transmission electron microscopy (Cryo-TEM) and peptide loading efficacy by ultra performance liquid chromatography. The antimicrobial effect of the LCNPs was investigated in vitro using minimum inhibitory concentration (MIC) and time-kill assay. The most hydrophobic peptide (AP114) was shown to induce an increase in negative curvature of the cubic LC system. The most polar peptide (DPK-060) induced a decrease in negative curvature while LL-37 did not change the LC phase at all. The hexagonal LC phase was not affected by any of the AMPs. Moreover, cubosomes loaded with peptides AP114 and DPK-060 showed preserved antimicrobial activity, whereas particles loaded with peptide LL-37 displayed a loss in its broad-spectrum bactericidal properties. AMP-loaded hexosomes showed a reduction in antimicrobial activity.
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Affiliation(s)
- Lukas Boge
- SP Technical Research Institute of Sweden, Drottning Kristinas väg 45, Box 5607, Stockholm SE 11486, Sweden
- Department of Chemical and Chemical Engineering, Applied Chemistry, Chalmers University of Technology , Kemigården 4, Göteborg SE-41296, Sweden
| | - Helena Bysell
- SP Technical Research Institute of Sweden, Drottning Kristinas väg 45, Box 5607, Stockholm SE 11486, Sweden
| | - Lovisa Ringstad
- SP Technical Research Institute of Sweden, Drottning Kristinas väg 45, Box 5607, Stockholm SE 11486, Sweden
| | - David Wennman
- SP Process Development, Forskargatan 18, Box 36, Södertälje SE 15121, Sweden
| | - Anita Umerska
- Inserm U1066, University of Angers , 4 rue Larrey, Cedex 9 Angers FR 49933, France
| | - Viviane Cassisa
- Laboratoire de Bactériologie-Hygiène, CHU Angers , 4 rue Larrey, Angers FR 49000, France
| | - Jonny Eriksson
- Department of Chemistry - BMC, Uppsala University , Husargatan 3, Box 579, Uppsala SE-75123, Sweden
| | | | - Katarina Edwards
- Department of Chemistry - BMC, Uppsala University , Husargatan 3, Box 579, Uppsala SE-75123, Sweden
| | - Martin Andersson
- Department of Chemical and Chemical Engineering, Applied Chemistry, Chalmers University of Technology , Kemigården 4, Göteborg SE-41296, Sweden
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Lee DR, Park JS, Bae IH, Lee Y, Kim BM. Liquid crystal nanoparticle formulation as an oral drug delivery system for liver-specific distribution. Int J Nanomedicine 2016; 11:853-71. [PMID: 27042053 PMCID: PMC4780723 DOI: 10.2147/ijn.s97000] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Liquid crystal nanoparticles have been utilized as an efficient tool for drug delivery with enhanced bioavailability, drug stability, and targeted drug delivery. However, the high energy requirements and the high cost of the liquid crystal preparation have been obstacles to their widespread use in the pharmaceutical industry. In this study, we prepared liquid crystal nanoparticles using a phase-inversion temperature method, which is a uniquely low energy process. Particles prepared with the above method were estimated to be ~100 nm in size and exhibited a lamellar liquid crystal structure with orthorhombic lateral packing. Pharmacokinetic and tissue distribution studies of a hydrophobic peptide-based drug candidate formulated with the liquid crystal nanoparticles showed a five-fold enhancement of bioavailability, sustained release, and liver-specific drug delivery compared to a host-guest complex formulation.
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Affiliation(s)
- Dong Ryeol Lee
- Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul, Republic of Korea; Technology Development Center, BASF Company Ltd., Hwaseong, Gyeonggi-do, Republic of Korea
| | - Ji Su Park
- Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul, Republic of Korea
| | - Il Hak Bae
- Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul, Republic of Korea
| | - Yan Lee
- Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul, Republic of Korea
| | - B Moon Kim
- Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul, Republic of Korea
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63
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Pluhackova K, Morhenn H, Lautner L, Lohstroh W, Nemkovski KS, Unruh T, Böckmann RA. Extension of the LOPLS-AA Force Field for Alcohols, Esters, and Monoolein Bilayers and its Validation by Neutron Scattering Experiments. J Phys Chem B 2015; 119:15287-99. [DOI: 10.1021/acs.jpcb.5b08569] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Kristyna Pluhackova
- Computational
Biology, Department of Biology, University of Erlangen-Nürnberg, Staudtstrasse 5, 91058 Erlangen, Germany
| | - Humphrey Morhenn
- Lehrstuhl
für Kristallografie und Strukturphysik, Department Physik, Friedrich-Alexander-Universität Erlangen-Nürnberg, Staudtstrasse 3, 91058 Erlangen, Germany
| | - Lisa Lautner
- Lehrstuhl
für Kristallografie und Strukturphysik, Department Physik, Friedrich-Alexander-Universität Erlangen-Nürnberg, Staudtstrasse 3, 91058 Erlangen, Germany
| | - Wiebke Lohstroh
- Heinz
Maier-Leibnitz Zentrum (MLZ), Technische Universität München, Lichtenbergstrasse 1, 85748 Garching b. München, Germany
| | - Kirill S. Nemkovski
- Jülich
Center for Neutron Science JCNS, Forschungszentrum Jülich GmbH, Outstation at MLZ, Lichtenbergstrasse 1, 85747 Garching b. München, Germany
| | - Tobias Unruh
- Lehrstuhl
für Kristallografie und Strukturphysik, Department Physik, Friedrich-Alexander-Universität Erlangen-Nürnberg, Staudtstrasse 3, 91058 Erlangen, Germany
| | - Rainer A. Böckmann
- Computational
Biology, Department of Biology, University of Erlangen-Nürnberg, Staudtstrasse 5, 91058 Erlangen, Germany
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64
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How self-assembly of amphiphilic molecules can generate complexity in the nanoscale. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.07.058] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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65
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Chen Y, Liang X, Ma P, Tao Y, Wu X, Wu X, Chu X, Gui S. Phytantriol-based in situ liquid crystals with long-term release for intra-articular administration. AAPS PharmSciTech 2015; 16:846-54. [PMID: 25573438 PMCID: PMC4508300 DOI: 10.1208/s12249-014-0277-6] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2014] [Accepted: 12/18/2014] [Indexed: 11/30/2022] Open
Abstract
The purpose of this study was to develop an injectable in situ liquid crystal formulation for intra-articular (IA) administration, and in situ forming a viscous liquid crystalline gel with long-term release of sinomenine hydrochloride (SMH) upon water absorption. The pseudo-ternary phase diagram of phytantriol (PT)-ethanol (ET)-water was constructed, and isotropic solutions were chosen for further optimization. The physicochemical properties of isotropic solutions were evaluated, and the phase structures of liquid crystalline gels formed by isotropic solutions in excess water were confirmed by crossed polarized light microscopy (CPLM) and small-angle X-ray scattering (SAXS). In vitro drug release studies were conducted by using a dialysis membrane diffusion method. The optimal in situ cubic liquid crystal (ISV2) (PT/ET/water, 64:16:20, w/w/w) loaded with 6 mg/g of SMH showed a suitable pH, showed to be injectable, and formed a cubic liquid crystalline gel in situ with minimum water absorption within the shortest time. The optimal ISV2 was able to sustain the drug release for 6 days. An in situ hexagonal liquid crystal (ISH2) system was prepared by addition of 5% vitamin E acetate (VitEA) into PT in the optimal ISV2 system to improve the sustained release of SMH. This ISH2 (PT/VitEA/ET/water, 60.8:3.2:16:20, w/w/w/w) was an injectable isotropic solution with a suitable pH range. The developed ISH2 was found to be able to sustain the drug release for more than 10 days and was suitable for IA injection for the treatment of rheumatoid arthritis (RA).
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Affiliation(s)
- Yulin Chen
- />Department of Pharmaceutics, College of Pharmacy, Anhui University of Chinese Medicine, Hefei, Anhui Province 230012 China
| | - Xin Liang
- />Department of Pharmaceutics, College of Pharmacy, Anhui University of Chinese Medicine, Hefei, Anhui Province 230012 China
| | - Ping Ma
- />Global Pharmaceutical Research and Development, Hospira Inc., 1776 North Centennial Drive, McPherson, Kansas 67460 USA
| | - Yaotian Tao
- />Department of Pharmaceutics, College of Pharmacy, Anhui University of Chinese Medicine, Hefei, Anhui Province 230012 China
| | - Xiaoqing Wu
- />Department of Pharmaceutics, College of Pharmacy, Anhui University of Chinese Medicine, Hefei, Anhui Province 230012 China
| | - Xingxing Wu
- />Department of Pharmaceutics, College of Pharmacy, Anhui University of Chinese Medicine, Hefei, Anhui Province 230012 China
| | - Xiaoqing Chu
- />Department of Pharmaceutics, College of Pharmacy, Anhui University of Chinese Medicine, Hefei, Anhui Province 230012 China
| | - Shuangying Gui
- />Department of Pharmaceutics, College of Pharmacy, Anhui University of Chinese Medicine, Hefei, Anhui Province 230012 China
- />Anhui Key Laboratory of Modern Chinese Medicine, Hefei, Anhui Province 230012 China
- />Anhui “115” Xin’an Traditional Chinese Medicine Research & Development Innovation Team, Hefei, Anhui Province 230012 China
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