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Ramezanzade L, Hosseini SF, Sajedi RH, Mirzai Nielsen A, Yaghmur A. Food-grade hexosomes as efficient vehicles for delivery of fish-purified antioxidant peptide. Food Chem 2024; 434:137446. [PMID: 37722336 DOI: 10.1016/j.foodchem.2023.137446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 06/30/2023] [Accepted: 09/07/2023] [Indexed: 09/20/2023]
Abstract
Herein, we describe the potential use of food-grade hexosomes (HEXs) for delivering fish-purified antioxidant peptide (PF10). Using a binary lipid mixture of Dimodan U/citrem, the nanocarriers were produced with a size range of 202.7-569.8 nm and peptide encapsulation efficiency of 64.6-89.3%. These HEXs were also characterized by SAXS and cryo-TEM, and were able to sustain the release of PF10, where only 32.2% released in PBS after 24 h. SAXS findings verified that PF10 modulate the internal structure of HEXs in a pH-dependent manner. Antioxidant assays proved the efficacy of such nano-self-assemblies in maintaining the bioactivity of the loaded peptide. Moreover, the in vitro gastrointestinal stability test indicated that the antioxidant capacity of the free- and PF10-loaded HEXs decreased under SGF/SIF conditions with the reduction in activity being greater for the free PF10. The present findings may provide a useful basis for development of pH-responsive nano-self-assemblies for delivery of antioxidant peptides.
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Affiliation(s)
- Leila Ramezanzade
- Department of Seafood Processing, Faculty of Marine Sciences, Tarbiat Modares University, P.O. Box 46414-356, Noor, Iran.
| | - Seyed Fakhreddin Hosseini
- Department of Seafood Processing, Faculty of Marine Sciences, Tarbiat Modares University, P.O. Box 46414-356, Noor, Iran.
| | - Reza H Sajedi
- Department of Biochemistry, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran.
| | - Amy Mirzai Nielsen
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen Ø 2100, Denmark.
| | - Anan Yaghmur
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen Ø 2100, Denmark.
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2
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Vancuylenberg G, Sadeghpour A, Tyler AII, Rappolt M. From angular to round: in depth interfacial analysis of binary phosphatidylethanolamine mixtures in the inverse hexagonal phase. SOFT MATTER 2023; 19:8519-8530. [PMID: 37889160 DOI: 10.1039/d3sm01029e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2023]
Abstract
Packing stress in the lipidic inverse hexagonal HII phase arises from the necessity of the ideally cylinder-shaped micelles to fill out the hexagonally-shaped Wigner-Seitz unit cell. Thus, hydrocarbon chains stretch towards the corners and compress in the direction of the flat side of the hexagonal unit cell. Additionally, the lipid/water interface deviates from being perfectly circular. To study this packing frustration in greater detail, we have doped 1-palmitoyl-2-oleoyl-sn-phosphatidylethanolamine (POPE) with increasing molar concentrations of 1,2-palmitoyl-sn-phosphatidylethanolamine (DPPE: 0 to 15 mol%). Due to its effectively longer hydrophobic tails, DPPE tends to aggregate in the corner regions of the unit cell, and thus, increases the circularity of the lipid/water interface. From small angle X-ray diffraction (SAXD) we determined electron density maps. Using those, we analysed the size, shape and homogeneity of the lipid/water interface as well as that of the methyl trough region. At 6 and 9 mol% DPPE the nanotubular water core most closely resembles a circle; further to this, in comparison to its neighbouring concentrations, the 9 mol% DPPE sample has the smallest water core area and smallest number of lipids per circumference, best alleviating the packing stress. Finally, a three-water layer model was applied, discerning headgroup, perturbed and free water, demonstrating that the hexagonal phase is most stable in the direction of the flat faces (compression zones) and least stable towards the vertices of the unit cell (decompression zones).
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Affiliation(s)
| | - Amin Sadeghpour
- School of Food Science and Nutrition, University of Leeds, Leeds LS2 9JT, UK.
| | - Arwen I I Tyler
- School of Food Science and Nutrition, University of Leeds, Leeds LS2 9JT, UK.
| | - Michael Rappolt
- School of Food Science and Nutrition, University of Leeds, Leeds LS2 9JT, UK.
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3
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Araújo-Silva H, Teixeira PV, Gomes AC, Lúcio M, Lopes CM. Lyotropic liquid crystalline 2D and 3D mesophases: Advanced materials for multifunctional anticancer nanosystems. Biochim Biophys Acta Rev Cancer 2023; 1878:189011. [PMID: 37923232 DOI: 10.1016/j.bbcan.2023.189011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 10/03/2023] [Accepted: 10/23/2023] [Indexed: 11/07/2023]
Abstract
Cancer remains a leading cause of mortality. Despite significant breakthroughs in conventional therapies, treatment is still far from ideal due to high toxicity in normal tissues and therapeutic inefficiency caused by short drug lifetime in the body and resistance mechanisms. Current research moves towards the development of multifunctional nanosystems for delivery of chemotherapeutic drugs, bioactives and/or radionuclides that can be combined with other therapeutic modalities, like gene therapy, or imaging to use in therapeutic screening and diagnosis. The preparation and characterization of Lyotropic Liquid Crystalline (LLC) mesophases self-assembled as 2D and 3D structures are addressed, with an emphasis on the unique properties of these nanoassemblies. A comprehensive review of LLC nanoassemblies is also presented, highlighting the most recent advances and their outstanding advantages as drug delivery systems, including tailoring strategies that can be used to overcome cancer challenges. Therapeutic agents loaded in LLC nanoassemblies offer qualitative and quantitative enhancements that are superior to conventional chemotherapy, particularly in terms of preferential accumulation at tumor sites and promoting enhanced cancer cell uptake, lowering tumor volume and weight, improving survival rates, and increasing the cytotoxicity of their loaded therapeutic agents. In terms of quantitative anticancer efficacy, loaded LLC nanoassemblies reduced the IC50 values from 1.4-fold against lung cancer cells to 125-fold against ovarian cancer cells.
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Affiliation(s)
- Henrique Araújo-Silva
- Centro de Biologia Molecular e Ambiental (CBMA), Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Patricia V Teixeira
- Centro de Física das Universidades do Minho e Porto (CF-UM-UP), Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Andreia C Gomes
- Centro de Biologia Molecular e Ambiental (CBMA), Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal; Institute of Science and Innovation for Sustainability (IB-S), University of Minho, Campus of Gualtar, 4710-057 Braga, Portugal
| | - Marlene Lúcio
- Centro de Biologia Molecular e Ambiental (CBMA), Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal; Centro de Física das Universidades do Minho e Porto (CF-UM-UP), Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal.
| | - Carla M Lopes
- Instituto de Investigação, Inovação e Desenvolvimento (FP-I3ID), Biomedical and Health Sciences Research Unit (FP-BHS), Faculdade de Ciências da Saúde, Universidade Fernando Pessoa, 4200-150 Porto, Portugal; Associate Laboratory i4HB - Institute for Health and Bioeconomy, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal; UCIBIO - Applied Molecular Biosciences Unit, MEDTECH, Laboratory of Pharmaceutical Technology, Department of Drug Sciences, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal.
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4
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Synthesis and evaluation of a novel adapter lipid derivative for preparation of cyclic peptide-modified PEGylated liposomes: Application of cyclic RGD peptide. Eur J Pharm Sci 2022; 176:106239. [PMID: 35714942 DOI: 10.1016/j.ejps.2022.106239] [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] [Received: 03/08/2022] [Revised: 05/15/2022] [Accepted: 06/14/2022] [Indexed: 11/20/2022]
Abstract
Peptide ligand modified nanoparticles can simply prepared by post-insertion method to mix pre-formed nanoparticles with peptide-lipid conjugates in an aqueous solution at an optimal temperature. Therefore, water dispersibility of peptide-lipid conjugates is a very important factor for implementing the post-insertion method. We proposed that highly water dispersible peptide-lipid conjugates can be easily synthesized by separately designing novel adapter lipids with different water dispersibility and reacting them with ligands in a highly efficient manner. Adapter lipids have three critical roles; as spacers of ligand-conjugated lipids for efficient ligand presentation, as structures that form discrete molecular weight distributions, and as providing water dispersibility. In this study, we developed a novel adapter-lipid derivative that enables a variety of cyclic peptide modifications using the click reaction. The integrin αvβ3-targeted cyclic RGDfK (cRGD) peptide was selected as the cyclic peptide ligand. We designed a novel alkyne-tagged lipid with a discrete peptide spacer and bound the cRGD peptide using a click reaction to synthesize a cRGD-conjugated lipid with good water dispersibility for the preparation of cRGD-modified PEGylated liposomes using the post-insertion method. We also revealed that cRGD-modified PEGylated liposomes are efficiently associated with integrin αvβ3-expressing murine colon carcinoma (Colon-26) cells in a modification amount- and peptide sequence-dependent manner, showing high cytotoxicity upon loading with doxorubicin. This novel adapter lipid derivative can be used to synthesize various cyclic peptides by click reactions and will provide useful insights for the future development of cyclic peptide-modified PEGylated liposomes.
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5
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Dully M, Ceresnakova M, Murray D, Soulimane T, Hudson SP. Lipid Cubic Systems for Sustained and Controlled Delivery of Antihistamine Drugs. Mol Pharm 2021; 18:3777-3794. [PMID: 34547899 PMCID: PMC8493555 DOI: 10.1021/acs.molpharmaceut.1c00279] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Indexed: 12/03/2022]
Abstract
Antihistamines are capable of blocking mediator responses in allergic reactions including allergic rhinitis and dermatological reactions. By incorporating various H1 receptor antagonists into a lipid cubic phase network, these active ingredients can be delivered locally over an extended period of time owing to the mucoadhesive nature of the system. Local delivery can avoid inducing unwanted side effects, often observed after systematic delivery. Lipid-based antihistamine delivery systems are shown here to exhibit prolonged release capabilities. In vitro drug dissolution studies investigated the extent and release rate of two model first-generation and two model second-generation H1 antagonist antihistamine drugs from two monoacyglycerol-derived lipid models. To optimize the formulation approach, the systems were characterized macroscopically and microscopically by small-angle X-ray scattering and polarized light to ascertain the mesophase accessed upon an incorporation of antihistamines of varying solubilities and size. The impact of encapsulating the antihistamine molecules on the degree of mucoadhesivity of the lipid cubic systems was investigated using multiparametric surface plasmon resonance. With the ultimate goal of developing therapies for the treatment of allergic reactions, the ability of the formulations to inhibit mediator release utilizing RBL-2H3 mast cells with the propensity to release histamine upon induction was explored, demonstrating no interference from the lipid excipient on the effectiveness of the antihistamine molecules.
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Affiliation(s)
- Michele Dully
- Department
of Chemical Sciences, SSPC, the Science Foundation Ireland Research
Centre for Pharmaceuticals, Bernal Institute, University of Limerick, Castletroy,
Co. Limerick V94 T9PX, Ireland
| | - Miriama Ceresnakova
- Department
of Chemical Sciences, SSPC, the Science Foundation Ireland Research
Centre for Pharmaceuticals, Bernal Institute, University of Limerick, Castletroy,
Co. Limerick V94 T9PX, Ireland
| | - David Murray
- COOK
Ireland Limited, O’Halloran
Rd, Castletroy, Co. Limerick V94 N8X2, Ireland
| | - Tewfik Soulimane
- Department
of Chemical Sciences, SSPC, the Science Foundation Ireland Research
Centre for Pharmaceuticals, Bernal Institute, University of Limerick, Castletroy,
Co. Limerick V94 T9PX, Ireland
| | - Sarah P. Hudson
- Department
of Chemical Sciences, SSPC, the Science Foundation Ireland Research
Centre for Pharmaceuticals, Bernal Institute, University of Limerick, Castletroy,
Co. Limerick V94 T9PX, Ireland
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6
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Dully M, Bhattacharya S, Verma V, Murray D, Thompson D, Soulimane T, Hudson SP. Balanced lipase interactions for degradation-controlled paclitaxel release from lipid cubic phase formulations. J Colloid Interface Sci 2021; 607:978-991. [PMID: 34571316 DOI: 10.1016/j.jcis.2021.09.024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 09/03/2021] [Accepted: 09/04/2021] [Indexed: 11/25/2022]
Abstract
Lipid cubic phase (LCP) formulations enhance the intestinal solubility and bioavailability of hydrophobic drugs by reducing precipitation and facilitating their mass transport to the intestinal surface for absorption. LCPs with an ester linkage connecting the acyl chain to the glycerol backbone (monoacylglycerols), are susceptible to chemical digestion by several lipolytic enzymes including lipases, accelerating the release of hydrophobic agents from the lipid bilayers of the matrix. Unlike regular enzymes that transform soluble substrates, lipolytic enzymes act at the interface of water and insoluble lipid. Therefore, compounds that bind to this interface can enhance or inhibit the activity of enzymes to varying extent. Here, we explore how the lipolysis rate can be tuned by the interfacial interaction of porcine pancreatic lipase with monoolein LCPs containing a known lipase inhibitor, tetrahydrolipstatin. Release of the Biopharmaceutical Classification System (BCS) class IV drug, paclitaxel, from the inhibitor-modified LCP was examined in the presence of lipase and its effectors colipase and calcium. By combining experimental dynamic digestion studies, thermodynamic measurements and molecular dynamics simulations of the competitive inhibition of lipase by tetrahydrolipstatin, we reveal the role and mode of action of lipase effectors in creating a precisely-balanced degradation-controlled LCP release system for the poorly soluble paclitaxel drug.
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Affiliation(s)
- Michele Dully
- Department of Chemical Sciences, SSPC the Science Foundation Ireland Research Centre for Pharmaceuticals, Bernal Institute, University of Limerick, Limerick V94 T9PX, Ireland
| | - Shayon Bhattacharya
- Department of Physics, Bernal Institute, University of Limerick, Limerick V94 T9PX, Ireland
| | - Vivek Verma
- Department of Chemical Sciences, SSPC the Science Foundation Ireland Research Centre for Pharmaceuticals, Bernal Institute, University of Limerick, Limerick V94 T9PX, Ireland
| | - David Murray
- COOK Ireland Limited, O'Halloran Rd, Castletroy, Co., Limerick, Ireland
| | - Damien Thompson
- Department of Physics, Bernal Institute, University of Limerick, Limerick V94 T9PX, Ireland.
| | - Tewfik Soulimane
- Department of Chemical Sciences, SSPC the Science Foundation Ireland Research Centre for Pharmaceuticals, Bernal Institute, University of Limerick, Limerick V94 T9PX, Ireland.
| | - Sarah P Hudson
- Department of Chemical Sciences, SSPC the Science Foundation Ireland Research Centre for Pharmaceuticals, Bernal Institute, University of Limerick, Limerick V94 T9PX, Ireland.
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7
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Bor G, Salentinig S, Şahin E, Nur Ödevci B, Roursgaard M, Liccardo L, Hamerlik P, Moghimi SM, Yaghmur A. Cell medium-dependent dynamic modulation of size and structural transformations of binary phospholipid/ω-3 fatty acid liquid crystalline nano-self-assemblies: Implications in interpretation of cell uptake studies. J Colloid Interface Sci 2021; 606:464-479. [PMID: 34399363 DOI: 10.1016/j.jcis.2021.07.149] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 07/21/2021] [Accepted: 07/29/2021] [Indexed: 10/20/2022]
Abstract
Lyotropic non-lamellar liquid crystalline (LLC) nanoparticles, with their tunable structural features and capability of loading a wide range of drugs and reporter probes, are emerging as versatile injectable nanopharmaceuticals. Secondary emulsifiers, such as Pluronic block copolymers, are commonly used for colloidal stabilization of LLC nanoparticles, but their inclusion often compromises the biological safety (e.g., poor hemocompatibility and enhanced cytotoxicity) of the formulation. Here, we introduce a library of colloidally stable, structurally tunable, and pH-responsive lamellar and non-lamellar liquid crystalline nanoparticles from binary mixtures of a phospholipid (phosphatidylglycerol) and three types of omega-3 fatty acids (ω-3 PUFAs), prepared in the absence of a secondary emulsifier and organic solvents. We study formulation size distribution, morphological heterogeneity, and the arrangement of their internal self-assembled architectures by nanoparticle tracking analysis, synchrotron small-angle X-ray scattering, and cryo-transmission electron microscopy. The results show the influence of type and concentration of ω-3 PUFAs in nanoparticle structural transitions spanning from a lamellar (Lα) phase to inverse discontinuous (micellar) cubic Fd3m and hexagonal phase (H2) phases, respectively. We further report on cell-culture medium-dependent dynamic fluctuations in nanoparticle size, number and morphology, and simultaneously monitor uptake kinetics in two human cell lines. We discuss the role of these multiparametric biophysical transformations on nanoparticle-cell interaction kinetics and internalization mechanisms. Collectively, our findings contribute to the understanding of fundamental steps that are imperative for improved engineering of LLC nanoparticles with necessary attributes for pharmaceutical development.
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Affiliation(s)
- Gizem Bor
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark
| | - Stefan Salentinig
- Department of Chemistry, University of Fribourg, Chemin du Musée 9, 1700 Fribourg, Switzerland
| | - Evrim Şahin
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark
| | - Begüm Nur Ödevci
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark
| | - Martin Roursgaard
- Department of Public Health, Section of Environmental Health, University of Copenhagen, Øster Farimagsgade 5A, DK-1014 Copenhagen K, Denmark
| | - Letizia Liccardo
- Department of Molecular Science and Nanosystems, Ca' Foscari Università di Venezia, Via Torino 155, Venezia Mestre, Italy
| | - Petra Hamerlik
- Brain Tumor Biology, Danish Cancer Society Research Center, Strandboulevarden 49, DK-2100 Copenhagen Ø, Denmark
| | - Seyed Moein Moghimi
- School of Pharmacy, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK; Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne NE2 4HH, UK; Colorado Center for Nanomedicine and Nanosafety, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA.
| | - Anan Yaghmur
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark.
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Stability of cubic phase and curvature tuning in the lyotropic system of branched chain galactose-based glycolipid by amphiphilic additives. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126697] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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9
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Liu D, Angelova A, Liu J, Garamus VM, Angelov B, Zhang X, Li Y, Feger G, Li N, Zou A. Self-assembly of mitochondria-specific peptide amphiphiles amplifying lung cancer cell death through targeting the VDAC1-hexokinase-II complex. J Mater Chem B 2020; 7:4706-4716. [PMID: 31364685 DOI: 10.1039/c9tb00629j] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Mitochondria-targeting peptides represent an emergent tool for cancer inhibition. Here supramolecular assemblies of novel amphiphilic cell-penetrating peptides for targeting cancer cell mitochondria are reported. The employed strategy aims at amplifying the apoptotic stimuli by weakening the mitochondrial VDAC1 (voltage-dependent anion channel-1)-hexokinase-II (HK-II) interaction. Peptide engineering is performed with the N-terminus of the HK-II protein, which binds to VDAC1. First, a designed positively charged segment (pKV) is anchored to the specific 15 amino acid sequence (MIASHLLAYFFTELN) to yield a cell-penetrating peptide (pHK-pKV). Second, a lipid chain (Pal) is conjugated to the N-terminus of pHK-pKV in order to enhance the intracellular delivery of the HK-II scaffold. The self-assembly properties of these two synthetic peptides are investigated by synchrotron small-angle X-ray scattering (BioSAXS) and cryogenic transmission electron (cryo-TEM) imaging, which evidence the formation of nanoassemblies of ellipsoid-like shapes. Circular dichroism (CD) spectroscopy demonstrates the induction of partial α-helical structures in the amphiphilic peptides. Confocal microscopy reveals the specific mitochondrial location of Pal-pHK-pKV assemblies in human non-small cell lung cancer (NSCLC) A549 cells. The cytotoxicity and apoptotic studies indicate the enhanced bioactivity of Pal-pHK-pKV self-assembled reservoirs, which cause massive A549 cell death with regard to pHK-pKV. Of significance, Pal-pHK-pKV treatment of non-cancerous NCM460 cells resulted in substantially lower cytotoxicity. The results demonstrate the potential of self-assembled lipo-peptide (HK-II-derived) conjugates as a promising strategy in cancer therapy.
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Affiliation(s)
- Dan Liu
- Shanghai Key Laboratory of Functional Materials Chemistry, State Key Laboratory of Bioreactor Engineering and Institute of Applied Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China.
| | - Angelina Angelova
- Institut Galien Paris-Sud, CNRS UMR 8612, LabEx LERMIT, Univ. Paris-Sud, Université Paris-Saclay, F-92296 Châtenay-Malabry, France
| | - Jianwen Liu
- State Key Laboratory of Bioreactor Engineering & Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Vasil M Garamus
- Helmholtz-Zentrum Geesthacht, Centre for Materials and Coastal Research, D-21502 Geesthacht, Germany
| | - Borislav Angelov
- Institute of Physics, ELI Beamlines, Academy of Sciences of the Czech Republic, Na Slovance 2, CZ-18221 Prague, Czech Republic
| | - Xinlei Zhang
- Shanghai Key Laboratory of Functional Materials Chemistry, State Key Laboratory of Bioreactor Engineering and Institute of Applied Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China.
| | - Yawen Li
- Shanghai Key Laboratory of Functional Materials Chemistry, State Key Laboratory of Bioreactor Engineering and Institute of Applied Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China.
| | - Guillaume Feger
- Institut Galien Paris-Sud, CNRS UMR 8612, LabEx LERMIT, Univ. Paris-Sud, Université Paris-Saclay, F-92296 Châtenay-Malabry, France
| | - Na Li
- National Center for Protein Science Shanghai and Shanghai Institute of Biochemistry and Cell Biology, Shanghai 200120, P. R. China.
| | - Aihua Zou
- Shanghai Key Laboratory of Functional Materials Chemistry, State Key Laboratory of Bioreactor Engineering and Institute of Applied Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China.
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A structurally diverse library of glycerol monooleate/oleic acid non-lamellar liquid crystalline nanodispersions stabilized with nonionic methoxypoly(ethylene glycol) (mPEG)-lipids showing variable complement activation properties. J Colloid Interface Sci 2020; 582:906-917. [PMID: 32919118 DOI: 10.1016/j.jcis.2020.08.085] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 08/14/2020] [Accepted: 08/24/2020] [Indexed: 12/15/2022]
Abstract
Pluronic F127-stabilized non-lamellar liquid crystalline aqueous nanodispersions are promising injectable platforms for drug and contrast agent delivery. These nanodispersions, however, trigger complement activation in the human blood, where the extent of complement activation and opsonization processes may compromise their biological performance and safety. Here, we introduce a broad family of nanodispersions from glycerol monooleate (GMO) and oleic acid (OA) in different weight ratios, and stabilized with a plethora of nonionic methoxypoly(ethylene glycol) (mPEG)-lipids of different PEG chain length and variable lipid moiety (monounsaturated or saturated diglycerides or D-α-tocopheryl succinate). Through an integrated biophysical approach involving dynamic light scattering, synchrotron small-angle scattering, and cryo-transmission electron microscopy, we examine the impact of nonionic mPEG-lipid stabilization on size, internal self-assembled architecture, and gross morphological characteristics of nanodispersions. The results show how the nonionic mPEG-lipid type and concentration, and dependent on GMO/OA weight ratio, can variably modulate the internal architectures of nanoparticles. Assessment of complement profiling from selected nanodispersions with diverse structural heterogeneity further suggests a variable modulatory role for the lipid type of the nonionic mPEG-lipid in the extent of complement activation, which span from no activation to moderate to high levels. We comment on plausible mechanisms driving the observed complement activation variability and discuss the potential utility of these nanodispersions for future development of injectable nanopharmaceuticals.
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11
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Mendozza M, Balestri A, Montis C, Berti D. Controlling the Kinetics of an Enzymatic Reaction through Enzyme or Substrate Confinement into Lipid Mesophases with Tunable Structural Parameters. Int J Mol Sci 2020; 21:ijms21145116. [PMID: 32698376 PMCID: PMC7404178 DOI: 10.3390/ijms21145116] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 07/15/2020] [Accepted: 07/17/2020] [Indexed: 12/15/2022] Open
Abstract
Lipid liquid crystalline mesophases, resulting from the self-assembly of polymorphic lipids in water, have been widely explored as biocompatible drug delivery systems. In this respect, non-lamellar structures are particularly attractive: they are characterized by complex 3D architectures, with the coexistence of hydrophobic and hydrophilic regions that can conveniently host drugs of different polarities. The fine tunability of the structural parameters is nontrivial, but of paramount relevance, in order to control the diffusive properties of encapsulated active principles and, ultimately, their pharmacokinetics and release. In this work, we investigate the reaction kinetics of p-nitrophenyl phosphate conversion into p-nitrophenol, catalysed by the enzyme Alkaline Phosphatase, upon alternative confinement of the substrate and of the enzyme into liquid crystalline mesophases of phytantriol/H2O containing variable amounts of an additive, sucrose stearate, able to swell the mesophase. A structural investigation through Small-Angle X-ray Scattering, revealed the possibility to finely control the structure/size of the mesophases with the amount of the included additive. A UV-vis spectroscopy study highlighted that the enzymatic reaction kinetics could be controlled by tuning the structural parameters of the mesophase, opening new perspectives for the exploitation of non-lamellar mesophases for confinement and controlled release of therapeutics.
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12
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Non-Lamellar Liquid Crystalline Nanocarriers for Thymoquinone Encapsulation. Molecules 2019; 25:molecules25010016. [PMID: 31861549 PMCID: PMC6982919 DOI: 10.3390/molecules25010016] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 12/16/2019] [Accepted: 12/17/2019] [Indexed: 01/09/2023] Open
Abstract
Owing to their unique structural features, non-lamellar liquid crystalline nanoparticles comprising cubosomes and hexosomes are attracting increasing attention as versatile investigative drug carriers. Background: Depending on their physiochemical characteristics, drug molecules on entrapment can modulate and reorganize structural features of cubosomes and hexosomes. Therefore, it is important to assess the effect of guest molecules on broader biophysical characteristics of non-lamellar liquid crystalline nanoparticles, since drug-induced architectural, morphological, and size modifications can affect the biological performance of cubosomes and hexosomes. Methods: We report on alterations in morphological, structural, and size characteristics of nanodispersions composed from binary mixtures of glycerol monooleate and vitamin E on thymoquinone (a molecule with wide therapeutic potentials) loading. Results: Thymoquinone loading was associated with a slight increase in the mean hydrodynamic nanoparticle size and led to structural transitions from an internal biphasic feature of coexisting inverse cubic Fd3m and hexagonal (H2) phases to an internal inverse cubic Fd3m phase (micellar cubosomes) or an internal inverse micellar (L2) phase (emulsified microemulsions, EMEs). We further report on the presence of “flower-like” vesicular populations in both native and drug-loaded nanodispersions. Conclusions: These nanodispersions have the potential to accommodate thymoquinone and may be considered as promising platforms for the development of thymoquinone nanomedicines.
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13
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Castelletto V, Edwards-Gayle CJC, Hamley IW, Pelin JNBD, Alves WA, Aguilar AM, Seitsonen J, Ruokolainen J. Self-Assembly of a Catalytically Active Lipopeptide and Its Incorporation into Cubosomes. ACS APPLIED BIO MATERIALS 2019; 2:3639-3647. [PMID: 32064461 PMCID: PMC7011704 DOI: 10.1021/acsabm.9b00489] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 07/03/2019] [Indexed: 11/29/2022]
Abstract
The self-assembly and biocatalytic activity of the proline-functionalized lipopeptide PRW-NH-C16 are examined and compared to that of the related PRW-O-C16 lipopeptide, which differs in having an ester linker between the lipid chain and tripeptide headgroup instead of an amide linker. Lipopeptide PRW-NH-C16 self-assembles into spherical micelles above a critical aggregation concentration, similar to the behavior of PRW-O-C16 reported previously [B. M. Soares et al. Phys. Chem. Chem. Phys., 2017, 19, 1181-1189]. However, PRW-NH-C16 shows an improved catalytic activity in a model aldol reaction. In addition, we explore the incorporation of the biocatalytic lipopeptide into lipid cubosomes. SAXS shows that increasing lipopeptide concentration leads to an expansion of the monoolein cubosome lattice spacing and a loss of long-range cubic order as the lipopeptide is encapsulated in the cubosomes. At higher loadings of lipopeptide, reduced cubosome formation is observed at the expense of vesicle formation. Our results show that the peptide-lipid chain linker does not influence self-assembly but does impart an improved biocatalytic activity. Furthermore, we show that lipopeptides can be incorporated into lipid cubosomes, leading to restructuring into vesicles at high loadings. These findings point the way toward the future development of bioactive lipopeptide assemblies and slow release cubosome-based delivery systems.
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Affiliation(s)
- Valeria Castelletto
- Department of Chemistry, University of Reading, Reading RG6 6AD, United Kingdom
| | | | - Ian W Hamley
- Department of Chemistry, University of Reading, Reading RG6 6AD, United Kingdom
| | - Juliane N B D Pelin
- Centro de Ciências Naturais e Humanas, Federal do ABC, Santo André 09210-580, Brazil
| | - Wendel A Alves
- Centro de Ciências Naturais e Humanas, Federal do ABC, Santo André 09210-580, Brazil
| | - Andrea M Aguilar
- Instituto de Ciências Ambientais, Químicas e Farmacêuticas, Universidade Federal de São Paulo, Diadema 09972-270, Brazil
| | - Jani Seitsonen
- Nanomicroscopy Center, Aalto University, Puumiehenkuja 2, Espoo FIN-02150, Finland
| | - Janne Ruokolainen
- Nanomicroscopy Center, Aalto University, Puumiehenkuja 2, Espoo FIN-02150, Finland
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14
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Current potential and challenges in the advances of liquid crystalline nanoparticles as drug delivery systems. Drug Discov Today 2019; 24:1405-1412. [DOI: 10.1016/j.drudis.2019.05.004] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Revised: 02/16/2019] [Accepted: 05/09/2019] [Indexed: 12/20/2022]
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15
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A vesicle-to-sponge transition via the proliferation of membrane-linking pores in ω-3 polyunsaturated fatty acid-containing lipid assemblies. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.01.124] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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16
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Leung SSW, Leal C. The stabilization of primitive bicontinuous cubic phases with tunable swelling over a wide composition range. SOFT MATTER 2019; 15:1269-1277. [PMID: 30462135 PMCID: PMC6876301 DOI: 10.1039/c8sm02059k] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
In this paper we investigate the pseudo-ternary phase diagram of glycerol monooleate (GMO), a cationic lipid (DOTAP - 1,2-dioleoyl-3-trimethylammonium propane), and a "PEGylated" lipid (DOPE-PEG - 1,2-dioleoyl-sn-glycero-3-phosphoethanolamine-N-[methoxy(polyethylene glycol)-2000 kDa]) in excess water. We use small angle X-ray scattering (SAXS) and cryogenic transmission electron microscopy (Cryo-EM) to map out a phase diagram in a regime of low DOPE-PEG content (1-5 mol%), which is pertinent for the application of lipid systems as carriers of biomolecular cargo to cells. Pure GMO is known to self-assemble into bicontinuous cubic phases of the gyroid type at low water content and of the diamond type in excess water. These complex structures have numerous advantages reaching beyond drug delivery, e.g. as protein crystallization matrices, but their formulation is challenging as very small contents of guest molecules can shift the phase behavior towards other geometries such as the lamellar phase. In this work, we show that the ternary GMO/DOTAP/DOPE-PEG system allows the stabilization of bicontinuous cubic phases in excess water over a wide composition range. The symmetry of the phase can be tuned by varying the amount of PEGylated lipid, with the primitive type dominating at low DOPE-PEG content (1-3 mol%) and the diamond phase arising at 5 mol% DOPE-PEG. In addition, we found that the diamond phase is virtually non-responsive to electrostatic swelling. In contrast, primitive bicontinuous cubic lattice dimensions swell up in equilibrium to 650 Å with increased cationic lipid content.
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Affiliation(s)
- Sherry S W Leung
- Department of Materials Science and Engineering, University of Illinois at Urbana, Champaign, USA.
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17
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Shao X, Bor G, Al-Hosayni S, Salentinig S, Yaghmur A. Structural characterization of self-assemblies of new omega-3 lipids: docosahexaenoic acid and docosapentaenoic acid monoglycerides. Phys Chem Chem Phys 2018; 20:23928-23941. [PMID: 30209464 DOI: 10.1039/c8cp04256j] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The attractiveness of new omega-3 (ω-3) polyunsaturated fatty acid (PUFA) monoglycerides (MAGs) lies in the amphiphilic nature and the beneficial health effects as PUFA precursors in various disorders including cancer, pulmonary hypertension, and inflammatory diseases. For exploring the potential therapeutic applications of these new amphiphilic lipids, particularly as main lipid constituents in the development of nanocarriers for delivery of drugs and PUFAs, it is of paramount importance to gain insight into their self-assembly behavior on exposure to excess water. This work describes the structural characteristics of self-assemblies based on two newly synthesized MAGs, namely docosahexaenoic acid (MAG-DHA) and docosapentaenoic acid (MAG-DPA) monoglycerides, on exposure to excess water. We found that both lipids tend to form a dominant inverse hexagonal (H2) phase in excess water at 25 °C and a temperature-triggered structural transition to an inverse micellar solution (L2 phase) is detected similar to that recently reported (A. Yaghmur et al., Langmuir, 2017, 33, 14045-14057) for eicosapentaenoic acid monoglyceride (MAG-EPA). An experimental SAXS structural evaluation study on the temperature-dependent behavior of these new monoglycerides is provided, and the effects of unsaturation degree and fatty acyl chain length on the self-assembled structural features in excess water and on the H2-L2 phase transition temperature are discussed. In addition, hexosomes stabilized by using the triblock copolymer F127 and the food-grade emulsifier citrem were investigated to gain insights into the effects of stabilizer and temperature on the internal nanostructure. These nanoparticles are attractive for use in the development of nanocarriers for delivering drugs and/or nutritional compounds as the beneficial health effects of ω-3 PUFA monoglycerides can be combined with those of loaded therapeutic agents or nutraceuticals.
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Affiliation(s)
- Xianrong Shao
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark.
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18
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Thorn CR, Prestidge CA, Boyd BJ, Thomas N. Pseudomonas Infection Responsive Liquid Crystals for Glycoside Hydrolase and Antibiotic Combination. ACS APPLIED BIO MATERIALS 2018; 1:281-288. [DOI: 10.1021/acsabm.8b00062] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Chelsea R. Thorn
- School of Pharmacy and Medical Science, and ARC Centre for Excellence in Bio-Nano Science and Technology, University of South Australia Cancer Research Institute, North Tce, Adelaide, South Australia 5000, Australia
- Biofilm Test Facility, Sansom Institute, University of South Australia, City East Campus, Frome Road, Adelaide, South Australia 5001, Australia
| | - Clive A. Prestidge
- School of Pharmacy and Medical Science, and ARC Centre for Excellence in Bio-Nano Science and Technology, University of South Australia Cancer Research Institute, North Tce, Adelaide, South Australia 5000, Australia
| | - Ben J. Boyd
- Drug Delivery Disposition and Dynamics, and ARC Centre for Excellence in Bio-Nano Science and Technology, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, Victoria 3052 Australia
| | - Nicky Thomas
- School of Pharmacy and Medical Science, and ARC Centre for Excellence in Bio-Nano Science and Technology, University of South Australia Cancer Research Institute, North Tce, Adelaide, South Australia 5000, Australia
- Biofilm Test Facility, Sansom Institute, University of South Australia, City East Campus, Frome Road, Adelaide, South Australia 5001, Australia
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19
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Wilner SE, Xiao Q, Graber ZT, Sherman SE, Percec V, Baumgart T. Dendrimersomes Exhibit Lamellar-to-Sponge Phase Transitions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:5527-5534. [PMID: 29660277 PMCID: PMC6010174 DOI: 10.1021/acs.langmuir.8b00275] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Lamellar to nonlamellar membrane shape transitions play essential roles in key cellular processes, such as membrane fusion and fission, and occur in response to external stimuli, including drug treatment and heat. A subset of these transitions can be modeled by means of thermally inducible amphiphile assemblies. We previously reported on mixtures of hydrogenated, fluorinated, and hybrid Janus dendrimers (JDs) that self-assemble into complex dendrimersomes (DMSs), including dumbbells, and serve as promising models for understanding the complexity of biological membranes. Here we show, by means of a variety of complementary techniques, that DMSs formed by single JDs or by mixtures of JDs undergo a thermally induced lamellar-to-sponge transition. Consistent with the formation of a three-dimensional bilayer network, we show that DMSs become more permeable to water-soluble fluorophores after transitioning to the sponge phase. These DMSs may be useful not only in modeling isotropic membrane rearrangements of biological systems but also in drug delivery since nonlamellar delivery vehicles can promote endosomal disruption and cargo release.
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Affiliation(s)
- Samantha E. Wilner
- Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Qi Xiao
- Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Zachary T. Graber
- Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Samuel E. Sherman
- Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Virgil Percec
- Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Tobias Baumgart
- Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
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20
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Mendozza M, Montis C, Caselli L, Wolf M, Baglioni P, Berti D. On the thermotropic and magnetotropic phase behavior of lipid liquid crystals containing magnetic nanoparticles. NANOSCALE 2018; 10:3480-3488. [PMID: 29404545 DOI: 10.1039/c7nr08478a] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The inclusion of superparamagnetic iron oxide nanoparticles (SPIONs) in lipid mesophases is a promising strategy for drug-delivery applications, combining the innate biocompatibility of lipid architectures with SPIONs' response to external magnetic fields. Moreover, the organization of SPIONs within the lipid scaffold can lead to locally enhanced SPIONs concentration and improved magnetic response, which is key to overcome the current limitations of hyperthermic treatments. Here we present a Small-Angle X-ray Scattering (SAXS) structural investigation of the thermotropic and magnetotropic behavior of glyceryl monooleate (GMO)/water mesophases, loaded with hydrophobic SPIONs. We prove that even very low amounts of SPIONs deeply alter the phase behavior and thermotropic properties of the mesophases, promoting a cubic to hexagonal phase transition, which is similarly induced upon application of an Alternating Magnetic Field (AMF). Moreover, in the hexagonal phase SPIONs spontaneously self-assemble within the lipid scaffold into a linear supraparticle. This phase behavior is interpreted in the framework of the Helfrich's theory, which shows that SPIONs affect the mesophase both from a viscoelastic and from a structural standpoint. Finally, the dispersion of these cubic phases into stable magnetic colloidal particles, which retain their liquid crystalline internal structure, is addressed as a promising route towards magneto-responsive drug-delivery systems (DDS).
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Affiliation(s)
- Marco Mendozza
- Department of chemistry and CSGI, University of Florence, Via della Lastruccia 3, Sesto Fiorentino, 50019 Florence, Italy.
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21
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Yaghmur A, Al-Hosayni S, Amenitsch H, Salentinig S. Structural Investigation of Bulk and Dispersed Inverse Lyotropic Hexagonal Liquid Crystalline Phases of Eicosapentaenoic Acid Monoglyceride. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:14045-14057. [PMID: 29136473 DOI: 10.1021/acs.langmuir.7b03078] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Recent studies demonstrated the potential therapeutic use of newly synthesized omega-3 (ω-3) polyunsaturated fatty acid (PUFA) monoglycerides owing to their beneficial health effects in various disorders including cancer and inflammation diseases. To date, the research was mainly focused on exploring the biological effects of these functional lipids. However, to the best of our knowledge, there is no report on the hydration-mediated self assembly of these lipids that leads to the formation of nanostructures, which are attractive for use as vehicles for the delivery of drugs and functional foods. In the present study, we investigated the temperature-composition phase behaviour of eicosapentaenoic acid monoglyceride (MAG-EPA), which is one of the most investigated ω-3 PUFA monoglycerides, during a heating-cooling cycle in the temperature range of 5-60 °C. Experimental synchrotron small-angle X-ray scattering (SAXS) evidence on the formation of a dominant inverse hexagonal (H2) lyotropic liquid crystalline phase and its temperature-induced transition to an inverse micellar solution (L2 phase) is presented for the fully hydrated bulk MAG-EPA system and its corresponding dispersion. We produced colloidal MAG-EPA hexosomes with an internal inverse hexagonal (H2) lyotropic crystalline phase in the presence of F127, a well-known polymeric stabilizer, or citrem, which is a negatively charged food-grade emulsifier. In this work, we report also on the formation of MAG-EPA hexosomes by vortexing MAG-EPA in excess aqueous medium containing F127 at room temperature. This low-energy emulsification method is different than most reported studies in the literature that have demonstrated the need for using a high-energy input during the emulsification step or adding an organic solvent for the formation of such colloidal nonlamellar liquid crystalline dispersions. The designed nanoparticles hold promise for future drug and functional food delivery applications due to their unique structural properties and the potential health-promoting effects of MAG-EPA.
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Affiliation(s)
- Anan Yaghmur
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen , Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark
| | - Sabah Al-Hosayni
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen , Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark
| | - Heinz Amenitsch
- Elettra-Sincrotrone Trieste , Strada Statale 14, 34149 Basovizza, Trieste, Italy
| | - Stefan Salentinig
- Laboratory for Biointerfaces, Empa, Swiss Federal Laboratories for Materials Science and Technology , Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland
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22
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Mei L, Huang X, Xie Y, Chen J, Huang Y, Wang B, Wang H, Pan X, Wu C. An injectable in situ gel with cubic and hexagonal nanostructures for local treatment of chronic periodontitis. Drug Deliv 2017; 24:1148-1158. [PMID: 28814112 PMCID: PMC8241103 DOI: 10.1080/10717544.2017.1359703] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Revised: 07/06/2017] [Accepted: 07/15/2017] [Indexed: 12/02/2022] Open
Abstract
Periodontitis is a chronic bacterial infection, and its effective treatment is dependent on the retention of antibiotics of effective concentrations at the periodontal pockets. In this study, a solution-gel based inverse lyotropic liquid crystalline (LLC) system was explored to deliver metronidazole to the periodontal pockets for local treatment of periodontitis. It was found that the metronidazole-loaded LLC precursor spontaneously transformed into gel in the presence of water in the oral cavity. The low viscosity of the precursor would allow its penetration to the rather difficult to reach infection sites, while the adhesiveness and crystalline nanostructures (inverse bicontinuous cubic Pn3m phase and inverse hexagonal phase) of the formed gel would permit its firm adhesion to the periodontal pockets. The LLC system provided sustained drug release over one week in vitro. Results from in vivo study using a rabbit periodontitis model showed that the LLC system was able to maintain the metronidazole concentrations in the periodontal pockets above the minimum inhibition concentration for over 10 days without detectable drug concentration in the blood. Owing to the spontaneous solution-gel transition in the periodontal pockets and unique liquid crystalline nanostructures, the LLC in situ gel provided effective treatment of periodontitis for a prolonged period of time with reduced systematic side effects, compared to metronidazole suspension which was effective for 24 h with detectable metronidazole concentrations in the blood after 6 h.
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Affiliation(s)
- Liling Mei
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Xintian Huang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Yecheng Xie
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Jintian Chen
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Ying Huang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Bei Wang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Hui Wang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Xin Pan
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Chuanbin Wu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
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23
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Steer D, Kang M, Leal C. Soft nanostructured films for directing the assembly of functional materials. NANOTECHNOLOGY 2017; 28:142001. [PMID: 28145900 DOI: 10.1088/1361-6528/aa5d77] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Lipids are a class of biological small molecules with hydrophilic and hydrophobic constituents forming the structural membranes in cells. Over the past century an extensive understanding of lipid biology and biophysics has been developed illuminating lipids as an intricate, highly tunable, and hierarchical soft-matter system. In addition to serving as cell membrane models, lipids have been investigated as microphase separated structures in aqueous solutions. In terms of applications lipids have been realized as powerful structural motifs for the encapsulation and cellular delivery of genetic material. More recently, lipids have also revealed promise as thin film materials, exhibiting long-range periodic nano-scale order and tunable orientation. In this review we summarize the pertinent understanding of lipid nanostructure development in bulk aqueous systems followed by the current and potential perturbations to these results induced by introduction of a substrate. These effects are punctuated by a summary of our published results in the field of lipid thin films with added nucleic acids and key results introducing hard materials into lipid nanostructured substrates.
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Affiliation(s)
- D Steer
- Materials Science and Engineering, University of Illinois at Urbana Champaign, United States of America
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24
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Meikle T, Drummond C, Separovic F, Conn C. Membrane-Mimetic Inverse Bicontinuous Cubic Phase Systems for Encapsulation of Peptides and Proteins. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/bs.abl.2017.01.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
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25
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Hamley IW, Hutchinson J, Kirkham S, Castelletto V, Kaur A, Reza M, Ruokolainen J. Nanosheet Formation by an Anionic Surfactant-like Peptide and Modulation of Self-Assembly through Ionic Complexation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:10387-10393. [PMID: 27636825 DOI: 10.1021/acs.langmuir.6b02180] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The surfactant-like peptide (Ala)6-(Asp) (A6D) is shown to self-assemble into ultrathin (3 nm thick) nanosheets in aqueous solution above a critical aggregation concentration. A combination of circular dichroism and FTIR spectroscopy and X-ray diffraction shows that the nanosheets comprise interdigitated bilayers of the peptide with β-sheet conformation. The self-assembly can be modulated by addition of hexamethylenediamine which is expected to interact with the anionic C terminus (and C-terminal D residue) of the peptide. Multiple ordered nanostructures can be accessed depending on the amount of added diamine. Nanosheet and bicontinuous network structures were observed using cryogenic-TEM and small-angle X-ray scattering. Addition of hexamethylenediamine at a sufficiently large molar ratio leads to disruption of the ordered nanostructure and the formation of a solution of A6D-diamine molecular complexes with highly charged end groups. The multiple acid-functionalized nanostructures that are accessible in this system are expected to have many applications in the fabrication of new nanomaterials.
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Affiliation(s)
- Ian W Hamley
- Department of Chemistry, University of Reading, Whiteknights , Reading RG6 6AD, U.K
| | - Jessica Hutchinson
- Department of Chemistry, University of Reading, Whiteknights , Reading RG6 6AD, U.K
| | - Steven Kirkham
- Department of Chemistry, University of Reading, Whiteknights , Reading RG6 6AD, U.K
| | - Valeria Castelletto
- Department of Chemistry, University of Reading, Whiteknights , Reading RG6 6AD, U.K
| | - Amanpreet Kaur
- Department of Chemistry, University of Reading, Whiteknights , Reading RG6 6AD, U.K
| | - Mehedi Reza
- Department of Applied Physics, Aalto University School of Science , P. O. Box 15100, FI-00076 Aalto, Finland
| | - Janne Ruokolainen
- Department of Applied Physics, Aalto University School of Science , P. O. Box 15100, FI-00076 Aalto, Finland
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26
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Salim M, Wan Iskandar WFN, Patrick M, Zahid NI, Hashim R. Swelling of Bicontinuous Cubic Phases in Guerbet Glycolipid: Effects of Additives. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:5552-61. [PMID: 27183393 DOI: 10.1021/acs.langmuir.6b01007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Inverse bicontinuous cubic phases of lyotropic liquid crystal self-assembly have received much attention in biomedical, biosensing, and nanotechnology applications. An Ia3d bicontinuous cubic based on the gyroid G-surface can be formed by the Guerbet synthetic glucolipid 2-hexyl-decyl-β-d-glucopyranoside (β-Glc-OC6C10) in excess water. The small water channel diameter of this cubic phase could provide nanoscale constraints in encapsulation of large molecules and crystallization of membrane proteins, hence stresses the importance of water channel tuning ability. This work investigates the swelling behavior of lyotropic self-assembly of β-Glc-OC6C10 which could be controlled and modulated by different surfactants as a hydration-modulating agent. Our results demonstrate that addition of nonionic glycolipid octyl-β-d-glucopyranoside (β-Glc-OC8) at 20 and 25 mol % gives the largest attainable cubic water channel diameter of ca. 62 Å, and formation of coacervates which may be attributed to a sponge phase were seen at 20 mol % octyl-β-d-maltopyranoside (β-Mal-OC8). Swelling of the cubic water channel can also be attained in charged surfactant-doped systems dioctyl sodium sulfosuccinate (AOT) and hexadecyltrimethylammonium bromide (CTAB), of which phase transition occurred from cubic to a lamellar phase. Destabilization of the cubic phase to an inverse hexagonal phase was observed when a high amount of charged lecithin (LEC) and stearylamine (SA) was added to the lipid self-assembly.
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Affiliation(s)
- Malinda Salim
- Center of Fundamental Science of Self-Assembly, Department of Chemistry, Faculty of Science, University of Malaya , 50603 Kuala Lumpur, Malaysia
| | - Wan Farah Nasuha Wan Iskandar
- Center of Fundamental Science of Self-Assembly, Department of Chemistry, Faculty of Science, University of Malaya , 50603 Kuala Lumpur, Malaysia
| | - Melonney Patrick
- Center of Fundamental Science of Self-Assembly, Department of Chemistry, Faculty of Science, University of Malaya , 50603 Kuala Lumpur, Malaysia
| | - N Idayu Zahid
- Center of Fundamental Science of Self-Assembly, Department of Chemistry, Faculty of Science, University of Malaya , 50603 Kuala Lumpur, Malaysia
| | - Rauzah Hashim
- Center of Fundamental Science of Self-Assembly, Department of Chemistry, Faculty of Science, University of Malaya , 50603 Kuala Lumpur, Malaysia
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27
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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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Abstract
Nonlamellar liquid crystalline phases are attractive platforms for drug solubilization and targeted delivery. The attractiveness of this formulation principle is linked to the nanostructural versatility, compatiblity, digestiblity and bioadhesive properties of their lipid constituents, and the capability of solubilizing and sustaining the release of amphiphilic, hydrophobic and hydrophilic drugs. Nonlamellar liquid crystalline phases offer two distinct promising strategies in the development of drug delivery systems. These comprise formation of ISAsomes (internally self-assembled ‘somes’ or particles) such as cubosomes and hexosomes, and in situ formation of parenteral dosage forms with tunable nanostructures at the site of administration. This review outlines the unique features of cubosomes and hexosomes and their potential utilization as promising platforms for drug delivery.
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Patil SS, Venugopal E, Bhat S, Mahadik KR, Paradkar AR. Exploring Microstructural Changes in Structural Analogues of Ibuprofen-Hosted In Situ Gelling System and Its Influence on Pharmaceutical Performance. AAPS PharmSciTech 2015; 16:1153-9. [PMID: 25716330 DOI: 10.1208/s12249-015-0308-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2014] [Accepted: 02/06/2015] [Indexed: 11/30/2022] Open
Abstract
The present work explores inner structuration of in situ gelling system consisting of glyceryl monooleate (GMO) and oleic acid (OA). The system under study involves investigation of microstructural changes which are believed to govern the pharmaceutical performance of final formulation. The changes which are often termed mesophasic transformation were analysed by small angle X-ray scattering (SAXS), differential scanning calorimetry (DSC), rheology and plane polarised light (PPL) microscopy. The current work revealed transformation of blank system from W/O emulsion to reverse hexagonal structure upon addition of structural analogues of ibuprofen. Such transformations are believed to occur due to increased hydrophobic volume within system as probed by SAXS analysis. The findings of SAXS studies were well supported by DSC, rheology and PPL microscopy. The study established inverse relationship between log P value of structural analogues of ibuprofen and the degree of binding of water molecules to surfactant chains. Such relationship had pronounced effect on sol-gel transformation process. The prepared in situ gelling system showed sustained drug release which followed Higuchi model.
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30
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Kumar M, Kumaraswamy G. Phase behaviour of the ternary system: monoolein-water-branched polyethylenimine. SOFT MATTER 2015; 11:5705-5711. [PMID: 26081120 DOI: 10.1039/c5sm01082a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Addition of a branched polymer, polyethyleneimine, significantly alters the organization of a glycerol monooleate (GMO) lipid-water system. We present detailed data over a wide range of compositions (water content from 10 to 40%, relative to GMO and PEI fractions from 0 to 4%) and temperatures (25-80 °C). The PEI molecular weight effects are examined using polymers over a range from 0.8 to 25 kDa. Addition of PEI induces the formation of higher curvature reverse phases. In particular, PEI induces the formation of the Fd3m phase: a discontinuous phase comprising reverse micelles of two different sizes stacked in a cubic AB2 crystal. The formation of the Fd3m phase at room temperature, upon addition of polar, water soluble PEI is unusual, since such phases typically are formed only upon addition of apolar oils. The largest stability window for the Fd3m phase is observed for PEI with a molecular weight = 2 kDa. We discuss how PEI influences the formation and stability of high curvature phases.
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Affiliation(s)
- Manoj Kumar
- Complex Fluids and Polymer Engineering Group, Polymer Science and Engineering Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, Maharashtra, India.
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31
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Azmi IDM, Wu L, Wibroe PP, Nilsson C, Østergaard J, Stürup S, Gammelgaard B, Urtti A, Moghimi SM, Yaghmur A. Modulatory effect of human plasma on the internal nanostructure and size characteristics of liquid-crystalline nanocarriers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:5042-5049. [PMID: 25884233 DOI: 10.1021/acs.langmuir.5b00830] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The inverted-type liquid-crystalline dispersions comprising cubosomes and hexosomes hold much potential for drug solubilization and site-specific targeting on intravenous administration. Limited information, however, is available on the influence of plasma components on nanostructural and morphological features of cubosome and hexosome dispersions, which may modulate their stability in the blood and their overall biological performance. Through an integrated approach involving SAXS, cryo-TEM, and nanoparticle tracking analysis (NTA) we have studied the time-dependent effect of human plasma (and the plasma complement system) on the integrity of the internal nanostructure, morphology, and fluctuation in size distribution of phytantriol (PHYT)-based nonlamellar crystalline dispersions. The results indicate that in the presence of plasma the internal nanostructure undergoes a transition from the biphasic phase (a bicontinuous cubic phase with symmetry Pn3m coexisting with an inverted-type hexagonal (H2) phase) to a neat hexagonal (H2) phase, which decreases the median particle size. These observations were independent of a direct effect by serum albumin and dispersion-mediated complement activation. The implication of these observations in relation to soft nanocarrier design for intravenous drug delivery is discussed.
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Affiliation(s)
| | | | | | | | | | | | | | - Arto Urtti
- §Centre for Drug Research, University of Helsinki, FIN-00014 Helsinki, Finland
- ∥School of Pharmacy, University of Eastern Finland, FIN-70211 Kuopio, Finland
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32
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Tyler AII, Barriga HMG, Parsons ES, McCarthy NLC, Ces O, Law RV, Seddon JM, Brooks NJ. Electrostatic swelling of bicontinuous cubic lipid phases. SOFT MATTER 2015; 11:3279-86. [PMID: 25790335 DOI: 10.1039/c5sm00311c] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Lipid bicontinuous cubic phases have attracted enormous interest as bio-compatible scaffolds for use in a wide range of applications including membrane protein crystallisation, drug delivery and biosensing. One of the major bottlenecks that has hindered exploitation of these structures is an inability to create targeted highly swollen bicontinuous cubic structures with large and tunable pore sizes. In contrast, cubic structures found in vivo have periodicities approaching the micron scale. We have been able to engineer and control highly swollen bicontinuous cubic phases of spacegroup Im3m containing only lipids by (a) increasing the bilayer stiffness by adding cholesterol and (b) inducing electrostatic repulsion across the water channels by addition of anionic lipids to monoolein. By controlling the composition of the ternary mixtures we have been able to achieve lattice parameters up to 470 Å, which is 5 times that observed in pure monoolein and nearly twice the size of any lipidic cubic phase reported previously. These lattice parameters significantly exceed the predicted maximum swelling for bicontinuous cubic lipid structures, which suggest that thermal fluctuations should destroy such phases for lattice parameters larger than 300 Å.
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Affiliation(s)
- Arwen I I Tyler
- Department of Chemistry, Imperial College London, South Kensington Campus, London SW7 2AZ, UK.
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33
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Borgheti-Cardoso LN, Depieri LV, Kooijmans SAA, Diniz H, Calzzani RAJ, Vicentini FTMDC, van der Meel R, Fantini MCDA, Iyomasa MM, Schiffelers RM, Bentley MVLB. An in situ gelling liquid crystalline system based on monoglycerides and polyethylenimine for local delivery of siRNAs. Eur J Pharm Sci 2015; 74:103-17. [PMID: 25917525 DOI: 10.1016/j.ejps.2015.04.017] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Revised: 04/16/2015] [Accepted: 04/20/2015] [Indexed: 12/11/2022]
Abstract
The development of delivery systems able to complex and release siRNA into the cytosol is essential for therapeutic use of siRNA. Among the delivery systems, local delivery has advantages over systemic administration. In this study, we developed and characterized non-viral carriers to deliver siRNA locally, based on polyethylenimine (PEI) as gene carrier, and a self-assembling drug delivery system that forms a gel in situ. Liquid crystalline formulations composed of monoglycerides (MO), PEI, propylene glycol (PG) and 0.1M Tris buffer pH 6.5 were developed and characterized by polarized light microscopy, Small Angle X-ray Scattering (SAXS), for their ability to form inverted type liquid crystalline phases (LC2) in contact with excess water, water absorption capacity, ability to complex with siRNA and siRNA release. In addition, gel formation in vivo was determined by subcutaneous injection of the formulations in mice. In water excess, precursor fluid formulations rapidly transformed into a viscous liquid crystalline phase. The presence of PEI influences the liquid crystalline structure of the LC2 formed and was crucial for complexing siRNA. The siRNA was released from the crystalline phase complexed with PEI. The release rate was dependent on the rate of water uptake. The formulation containing MO/PEI/PG/Tris buffer at 7.85:0.65:76.5:15 (w/w/w/w) complexed with 10 μM of siRNA, characterized as a mixture of cubic phase (diamond-type) and inverted hexagonal phase (after contact with excess water), showed sustained release for 7 days in vitro. In mice, in situ gel formation occurred after subcutaneous injection of the formulations, and the gels were degraded in 30 days. Initially a mild inflammatory process occurred in the tissue surrounding the gel; but after 14 days the tissue appeared normal. Taken together, this work demonstrates the rational development of an in situ gelling formulation for local release of siRNA.
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Affiliation(s)
- Lívia Neves Borgheti-Cardoso
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Av. do Café, s/n, 14040-903 Ribeirão Preto, SP, Brazil
| | - Lívia Vieira Depieri
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Av. do Café, s/n, 14040-903 Ribeirão Preto, SP, Brazil
| | - Sander A A Kooijmans
- Laboratory of Clinical Chemistry and Haematology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Henrique Diniz
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Av. do Café, s/n, 14040-903 Ribeirão Preto, SP, Brazil
| | | | | | - Roy van der Meel
- Laboratory of Clinical Chemistry and Haematology, University Medical Center Utrecht, Utrecht, The Netherlands
| | | | - Mamie Mizusaki Iyomasa
- Faculdade de Odontologia de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Raymond M Schiffelers
- Laboratory of Clinical Chemistry and Haematology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Maria Vitória Lopes Badra Bentley
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Av. do Café, s/n, 14040-903 Ribeirão Preto, SP, Brazil.
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34
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Hartnett TE, O’Connor AJ, Ladewig K. Cubosomes and other potential ocular drug delivery vehicles for macromolecular therapeutics. Expert Opin Drug Deliv 2015; 12:1513-26. [DOI: 10.1517/17425247.2015.1021680] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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35
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Park C, La Y, An TH, Jeong HY, Kang S, Joo SH, Ahn H, Shin TJ, Kim KT. Mesoporous monoliths of inverse bicontinuous cubic phases of block copolymer bilayers. Nat Commun 2015; 6:6392. [PMID: 25740100 DOI: 10.1038/ncomms7392] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Accepted: 01/27/2015] [Indexed: 01/28/2023] Open
Abstract
Solution self-assembly of block copolymers into inverse bicontinuous cubic mesophases is a promising new approach for creating porous polymer films and monoliths with highly organized bicontinuous mesoporous networks. Here we report the direct self-assembly of block copolymers with branched hydrophilic blocks into large monoliths consisting of the inverse bicontinuous cubic structures of the block copolymer bilayer. We suggest a facile and scalable method of solution self-assembly by diffusion of water to the block copolymer solution, which results in the unperturbed formation of mesoporous monoliths with large-pore (>25 nm diameter) networks weaved in crystalline lattices. The surface functional groups of the internal large-pore networks are freely accessible for large guest molecules such as protein complexes of which the molecular weight exceeded 100 kDa. The internal double-diamond (Pn3m) networks of large pores within the mesoporous monoliths could be replicated to self-supporting three-dimensional skeletal structures of crystalline titania and mesoporous silica.
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Affiliation(s)
- Chiyoung Park
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST Road, Ulsan 689-798, Korea
| | - Yunju La
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST Road, Ulsan 689-798, Korea
| | - Tae Hyun An
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST Road, Ulsan 689-798, Korea
| | - Hu Young Jeong
- UNIST Central Research Facilities, UNIST, Ulsan 689-798, Korea
| | - Sebyung Kang
- School of Life Sciences, UNIST, Ulsan 689-798, Korea
| | - Sang Hoon Joo
- 1] Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST Road, Ulsan 689-798, Korea [2] School of Energy and Chemical Engineering, UNIST, Ulsan 689-798, Korea
| | - Hyungju Ahn
- Pohang Accelerator Laboratory, POSTECH, Pohang 790-784, Korea
| | - Tae Joo Shin
- Pohang Accelerator Laboratory, POSTECH, Pohang 790-784, Korea
| | - Kyoung Taek Kim
- 1] Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST Road, Ulsan 689-798, Korea [2] KIST-UNIST-Ulsan Center for Convergence Materials, UNIST, Ulsan 689-698, Korea
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36
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Liang YL, Conn CE, Drummond CJ, Darmanin C. Uptake of the butyrate receptors, GPR41 and GPR43, in lipidic bicontinuous cubic phases suitable for in meso crystallization. J Colloid Interface Sci 2015; 441:78-84. [DOI: 10.1016/j.jcis.2014.11.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Revised: 11/03/2014] [Accepted: 11/04/2014] [Indexed: 10/24/2022]
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37
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Kralj-Iglič V. Membrane Microvesiculation and its Suppression. ADVANCES IN PLANAR LIPID BILAYERS AND LIPOSOMES 2015. [DOI: 10.1016/bs.adplan.2015.06.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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38
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Glycerol monooleate liquid crystalline phases used in drug delivery systems. Int J Pharm 2015; 478:569-87. [DOI: 10.1016/j.ijpharm.2014.11.072] [Citation(s) in RCA: 117] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Revised: 11/20/2014] [Accepted: 11/29/2014] [Indexed: 12/13/2022]
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39
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Salentinig S, Tangso KJ, Hawley A, Boyd BJ. pH-driven colloidal transformations based on the vasoactive drug nicergoline. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:14776-81. [PMID: 25409414 DOI: 10.1021/la503824z] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
The structure of colloidal self-assembled drug delivery systems can be influenced by intermolecular interactions between drug and amphiphilic molecules, and is important to understand in the context of designing improved delivery systems. Controlling these structures can enable controlled or targeted release systems for poorly water-soluble drugs. Here we present the interaction of the hydrophobic vasoactive drug nicergoline with the internal structure of nanostructured emulsion particles based on the monoglyceride-water system. Addition of this drug leads to modification of the internal bicontinuous cubic structure to generate highly pH-responsive systems. The colloidal structures were characterized with small-angle X-ray scattering and visualized using cryogenic transmission electron microscopy. Reversible transformations to inverse micelles at high pH, vesicles at low pH, and the modification of the spacing of the bicontinuous cubic structure at intermediate pH were observed, and enabled the in situ determination of an apparent pKa for the drug in this system--a difficult task using solution-based approaches. The characterization of this phase behavior is also highly interesting for the design of pH-responsive controlled release systems for poorly water-soluble drug molecules.
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Affiliation(s)
- Stefan Salentinig
- Drug Delivery, Disposition and Dynamics, and §ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash Institute of Pharmaceutical Sciences, Monash University (Parkville Campus) , 381 Royal Parade, Parkville, VIC 3052, Australia
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40
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Angelova A, Angelov B, Mutafchieva R, Lesieur S. Biocompatible Mesoporous and Soft Nanoarchitectures. J Inorg Organomet Polym Mater 2014. [DOI: 10.1007/s10904-014-0143-8] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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41
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Liquid crystalline phase as a probe for crystal engineering of lactose: carrier for pulmonary drug delivery. Eur J Pharm Sci 2014; 68:43-50. [PMID: 25460546 DOI: 10.1016/j.ejps.2014.11.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Revised: 11/14/2014] [Accepted: 11/14/2014] [Indexed: 11/21/2022]
Abstract
The current work was undertaken to assess suitability of liquid crystalline phase for engineering of lactose crystals and their utility as a carrier in dry powder inhalation formulations. Saturated lactose solution was poured in molten glyceryl monooleate which subsequently transformed into gel. The gel microstructure was analyzed by PPL microscopy and SAXS. Lactose particles recovered from gels after 48 h were analyzed for polymorphism using techniques such as FTIR, XRD, DSC and TGA. Particle size, morphology and aerosolisation properties of prepared lactose were analyzed using Anderson cascade impactor. In situ seeding followed by growth of lactose crystals took place in gels with cubic microstructure as revealed by PPL microscopy and SAXS. Elongated (size ∼ 71 μm) lactose particles with smooth surface containing mixture of α and β-lactose was recovered from gel, however percentage of α-lactose was more as compared to β-lactose. The aerosolisation parameters such as RD, ED, %FPF and % recovery of lactose recovered from gel (LPL) were found to be comparable to Respitose® ML001. Thus LC phase (cubic) can be used for engineering of lactose crystals so as to obtain particles with smooth surface, high elongation ratio and further they can be used as carrier in DPI formulations.
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42
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Fong WK, Hanley TL, Thierry B, Tilley A, Kirby N, Waddington LJ, Boyd BJ. Understanding the photothermal heating effect in non-lamellar liquid crystalline systems, and the design of new mixed lipid systems for photothermal on-demand drug delivery. Phys Chem Chem Phys 2014; 16:24936-53. [DOI: 10.1039/c4cp03635b] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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43
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Hartnett TE, Ladewig K, O’Connor AJ, Hartley PG, McLean KM. Size and Phase Control of Cubic Lyotropic Liquid Crystal Nanoparticles. J Phys Chem B 2014; 118:7430-9. [DOI: 10.1021/jp502898a] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Terence E. Hartnett
- Department
of Chemical and Biomolecular Engineering and Particulate Fluids Processing
Centre (PFPC), The University of Melbourne, Parkville, VIC 3010, Australia
- Commonwealth
Scientific and Industrial Research Organisation (CSIRO), Materials Science and Engineering, Clayton, VIC 3168, Australia
| | - Katharina Ladewig
- Department
of Chemical and Biomolecular Engineering and Particulate Fluids Processing
Centre (PFPC), The University of Melbourne, Parkville, VIC 3010, Australia
| | - Andrea J. O’Connor
- Department
of Chemical and Biomolecular Engineering and Particulate Fluids Processing
Centre (PFPC), The University of Melbourne, Parkville, VIC 3010, Australia
| | - Patrick G. Hartley
- Commonwealth
Scientific and Industrial Research Organisation (CSIRO), Materials Science and Engineering, Clayton, VIC 3168, Australia
| | - Keith M. McLean
- Commonwealth
Scientific and Industrial Research Organisation (CSIRO), Materials Science and Engineering, Clayton, VIC 3168, Australia
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44
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Fatouros D, Lamprou DA, Urquhart AJ, Yannopoulos SN, Vizirianakis IS, Zhang S, Koutsopoulos S. Lipid-like self-assembling peptide nanovesicles for drug delivery. ACS APPLIED MATERIALS & INTERFACES 2014; 6:8184-9. [PMID: 24821330 PMCID: PMC4059226 DOI: 10.1021/am501673x] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Accepted: 05/12/2014] [Indexed: 05/19/2023]
Abstract
Amphiphilic self-assembling peptides are functional materials, which, depending on the amino acid sequence, the peptide length, and the physicochemical conditions, form a variety of nanostructures including nanovesicles, nanotubes, and nanovalves. We designed lipid-like peptides with an aspartic acid or lysine hydrophilic head and a hydrophobic tail composed of six alanines (i.e., ac-A6K-CONH2, KA6-CONH2, ac-A6D-COOH, and DA6-COOH). The resulting novel peptides have a length similar to biological lipids and form nanovesicles at physiological conditions. AFM microscopy and light scattering analyses of the positively charged lipid-like ac-A6K-CONH2, KA6-CONH2 peptide formulations showed individual nanovesicles. The negatively charged ac-A6D-COOH and DA6-COOH peptides self-assembled into nanovesicles that formed clusters that upon drying were organized into necklace-like formations of nanovesicles. Encapsulation of probe molecules and release studies through the peptide bilayer suggest that peptide nanovesicles may be good candidates for sustained release of pharmaceutically active hydrophilic and hydrophobic compounds. Lipid-like peptide nanovesicles represent a paradigm shifting system that may complement liposomes for the delivery of diagnostic and therapeutic agents.
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Affiliation(s)
- Dimitrios
G. Fatouros
- School
of Pharmacy, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece
| | - Dimitrios A. Lamprou
- Strathclyde
Institute of Pharmacy and Biomedical Sciences (SIPBS), University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Andrew J. Urquhart
- Strathclyde
Institute of Pharmacy and Biomedical Sciences (SIPBS), University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - Spyros N. Yannopoulos
- Foundation
for Research and Technology, Hellas −
Institute of Chemical Engineering Sciences (FORTH/ICE-HT), P.O. Box 1414, GR-26504 Patra, Greece
| | | | - Shuguang Zhang
- Center
for Bits & Atoms, Massachusetts Institute
of Technology, 77 Massachusetts
Avenue, Cambridge, Massachusetts 02139, United States
| | - Sotirios Koutsopoulos
- Center
for Biomedical Engineering, Massachusetts
Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
- Tel.: +1-617-752-2042. Fax: +1-617-258-5239.
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45
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Lepeltier E, Bourgaux C, Maksimenko A, Meneau F, Rosilio V, Sliwinski E, Zouhiri F, Desmaële D, Couvreur P. Self-assembly of polyisoprenoyl gemcitabine conjugates: influence of supramolecular organization on their biological activity. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:6348-6357. [PMID: 24835925 DOI: 10.1021/la5007132] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
An amphiphilic prodrug of gemcitabine, a cytidine analogue used clinically against various tumors, had been previously synthesized by covalent coupling to squalene, a natural isoprenoid chain. The resulting bioconjugate self-assembled spontaneously in water as nanoparticles, displaying an impressive activity both in vitro and in vivo. The aim of the present study was to determine the influence of the length of the isoprene moiety on the structure of the nanoparticles, in an attempt to establish a relationship between the chemical structure of the prodrug, its supramolecular organization, and its pharmacological activity. Remarkably, gemcitabine-squalene and gemcitabine-5-isoprenes, which differ only in the position of two methyl groups on the hydrophobic chain, displayed different supramolecular organizations and different anticancer activities on some cell lines. This difference in activity was related to the ability of nanoparticles to be internalized by cells.
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Affiliation(s)
- Elise Lepeltier
- Institut Galien Paris-Sud, UMR CNRS 8612, Faculté de Pharmacie, l'Université Paris-Sud XI , 92296 Châtenay-Malabry Cedex, France
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46
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Nilsson C, Østergaard J, Larsen SW, Larsen C, Urtti A, Yaghmur A. PEGylation of phytantriol-based lyotropic liquid crystalline particles--the effect of lipid composition, PEG chain length, and temperature on the internal nanostructure. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:6398-6407. [PMID: 24833115 DOI: 10.1021/la501411w] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Poly(ethylene glycol)-grafted 1,2-distearoyl-sn-glycero-3-phosphoethanolamines (DSPE-mPEGs) are a family of amphiphilic lipopolymers attractive in formulating injectable long-circulating nanoparticulate drug formulations. In addition to long circulating liposomes, there is an interest in developing injectable long-circulating drug nanocarriers based on cubosomes and hexosomes by shielding and coating the dispersed particles enveloping well-defined internal nonlamellar liquid crystalline nanostructures with hydrophilic PEG segments. The present study attempts to shed light on the possible PEGylation of these lipidic nonlamellar liquid crystalline particles by using DSPE-mPEGs with three different block lengths of the hydrophilic PEG segment. The effects of lipid composition, PEG chain length, and temperature on the morphology and internal nanostructure of these self-assembled lipidic aqueous dispersions based on phytantriol (PHYT) were investigated by means of synchrotron small-angle X-ray scattering and Transmission Electron Cryo-Microscopy. The results suggest that the used lipopolymers are incorporated into the water-PHYT interfacial area and induce a significant effect on the internal nanostructures of the dispersed submicrometer-sized particles. The hydrophilic domains of the internal liquid crystalline nanostructures of these aqueous dispersions are functionalized, i.e., the hydrophilic nanochannels of the internal cubic Pn3m and Im3m phases are significantly enlarged in the presence of relatively small amounts of the used DSPE-mPEGs. It is evident that the partial replacement of PHYT by these PEGylated lipids could be an attractive approach for the surface modification of cubosomal and hexosomal particles. These PEGylated nanocarriers are particularly attractive in designing injectable cubosomal and hexosomal nanocarriers for loading drugs and/or imaging probes.
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Affiliation(s)
- Christa Nilsson
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen , Universitetsparken 2, DK-2100 Copenhagen, Denmark
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47
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Salentinig S, Phan S, Khan J, Hawley A, Boyd BJ. Formation of highly organized nanostructures during the digestion of milk. ACS NANO 2013; 7:10904-10911. [PMID: 24195467 DOI: 10.1021/nn405123j] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Nature's own emulsion, milk, consists of nutrients such as proteins, vitamins, salts, and milk fat with primarily triglycerides. The digestion of milk fats is the key to the survival of mammal species, yet it is surprising how little we understand this process. The lipase-catalyzed hydrolysis of dietary fats into fatty acids and monoglyceride is essential for efficient absorption of the fat by the enterocytes. Here we report the discovery of highly ordered geometric nanostructures during the digestion of dairy milk. Transitions from normal emulsion through a variety of differently ordered nanostructures were observed using time-resolved small-angle X-ray scattering on a high-intensity synchrotron source and visualized by cryogenic transmission electron microscopy. Water and hydrophilic molecules are transferred into the lipid phase of the milk particle, turning the lipid core gradually into a more hydrophilic environment. The formation of highly ordered lipid particles with substantial internal surface area, particularly in low-bile conditions, may indicate a compensating mechanism for maintenance of lipid absorption under compromised lipolysis conditions.
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Affiliation(s)
- Stefan Salentinig
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University (Parkville Campus) , 381 Royal Parade, Parkville, Victoria 3052, Australia
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48
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Dehsorkhi A, Castelletto V, Hamley IW, Seitsonen J, Ruokolainen J. Interaction between a cationic surfactant-like peptide and lipid vesicles and its relationship to antimicrobial activity. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:14246-53. [PMID: 24156610 PMCID: PMC3836358 DOI: 10.1021/la403447u] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Revised: 10/22/2013] [Indexed: 05/21/2023]
Abstract
We investigate the properties of an antimicrobial surfactant-like peptide (Ala)6(Arg), A6R, containing a cationic headgroup. The interaction of this peptide with zwitterionic (DPPC) lipid vesicles is investigated using a range of microscopic, X-ray scattering, spectroscopic, and calorimetric methods. The β-sheet structure adopted by A6R is disrupted in the presence of DPPC. A strong effect on the small-angle X-ray scattering profile is observed: the Bragg peaks from the DPPC bilayers in the vesicle walls are eliminated in the presence of A6R and only bilayer form factor peaks are observed. All of these observations point to the interaction of A6R with DPPC bilayers. These studies provide insight into interactions between a model cationic peptide and vesicles, relevant to understanding the action of antimicrobial peptides on lipid membranes. Notably, peptide A6R exhibits antimicrobial activity without membrane lysis.
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Affiliation(s)
- Ashkan Dehsorkhi
- School of Chemistry, Pharmacy and Food Biosciences, University of Reading , Whiteknights, Reading, RG6 6AD, United Kingdom
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49
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Sarkar N, Basu A. Phases and fluctuations in a model for asymmetric inhomogeneous fluid membranes. Phys Rev E 2013; 88:042106. [PMID: 24229115 DOI: 10.1103/physreve.88.042106] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2012] [Indexed: 01/25/2023]
Abstract
We propose and analyze a model for phase transitions in an inhomogeneous fluid membrane, that couples local composition with curvature nonlinearly. For asymmetric membranes, our model shows generic non-Ising behavior and the ensuing phase diagram displays either a first- or a second-order phase transition through a critical point (CP) or a tricritical point (TP), depending upon the bending modulus. It predicts generic nontrivial enhancement in fluctuations of asymmetric membranes that scales with system size in a power-law fashion at the CP and TP in two dimensions, not observed in symmetric membranes. It also yields two-dimensional Ising universality class for symmetric membranes, in agreement with experimental results.
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Affiliation(s)
- Niladri Sarkar
- Condensed Matter Physics Division, Saha Institute of Nuclear Physics, Calcutta 700064, India
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50
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Paukner C, Koziol KKK, Kulkarni CV. Lipid nanoscaffolds in carbon nanotube arrays. NANOSCALE 2013; 5:8992-9000. [PMID: 23832119 DOI: 10.1039/c3nr02068a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We present the fabrication of lipid nanoscaffolds inside carbon nanotube arrays by employing the nanostructural self-assembly of lipid molecules. The nanoscaffolds are finely tunable into model biomembrane-like architectures (planar), soft nanochannels (cylindrical) or 3-dimensionally ordered continuous bilayer structures (cubic). Carbon nanotube arrays hosting the above nanoscaffolds are formed by packing of highly oriented multiwalled carbon nanotubes which facilitate the alignment of lipid nanostructures without requiring an external force. Furthermore, the lipid nanoscaffolds can be created under both dry and hydrated conditions. We show their direct application in reconstitution of egg proteins. Such nanoscaffolds find enormous potential in bio- and nano-technological fields.
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Affiliation(s)
- Catharina Paukner
- Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge - CB2 3QZ, UK.
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