1
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Biophysical quantification of unitary solute and solvent permeabilities to enable translation to membrane science. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2022.121308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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2
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Subramani T, Ganapathyswamy H. An overview of liposomal nano-encapsulation techniques and its applications in food and nutraceutical. JOURNAL OF FOOD SCIENCE AND TECHNOLOGY 2020; 57:3545-3555. [PMID: 32903987 PMCID: PMC7447741 DOI: 10.1007/s13197-020-04360-2] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 03/12/2020] [Accepted: 03/17/2020] [Indexed: 02/06/2023]
Abstract
Encapsulation in packaging of food ingredients is of great interest at micro and nano levels. It is a distinct process leading to the entrapping of one substance within another material. Lipid oriented encapsulation methods are currently considered as a superior choice for encapsulation of sensitive ingredients, focusing on foods and dietary supplements of hydrophobic and hydrophilic molecules along with bioactive compounds, food ingredients supplementary systems for therapeutic purpose. Liposome and nanoliposome techniques have been widely used in food industry in nutrient enrichment and supplements. It enhances the sensory attributes and shelf life of the food product and serves as an alternative to micro encapsulation. These lipid and water oriented systems have distinguished advantages and provide higher surface area in food processing, which increases product solubility, bioavailability and permits accurate targeting of the encapsulated material to a greater extent in food and nutraceutical production. This review article focuses on nanoliposome, its preparation techniques, advantages and application of nanoliposome in food and nutraceutical process.
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Affiliation(s)
- Thirukkumar Subramani
- Department of Food Science and Nutrition, Community Science College and Research Institute, Tamil Nadu Agricultural University, Madurai, Tamil Nadu 625104 India
| | - Hemalatha Ganapathyswamy
- Department of Food Science and Nutrition, Community Science College and Research Institute, Tamil Nadu Agricultural University, Madurai, Tamil Nadu 625104 India
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3
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A reconstitution method for integral membrane proteins in hybrid lipid-polymer vesicles for enhanced functional durability. Methods 2018; 147:142-149. [PMID: 29410153 DOI: 10.1016/j.ymeth.2018.01.021] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Revised: 01/26/2018] [Accepted: 01/29/2018] [Indexed: 11/22/2022] Open
Abstract
Hybrid vesicles composed of lipids and block copolymers hold promise for increasing liposome stability and providing a stable environment for membrane proteins. Recently we reported the successful functional reconstitution of the integral membrane protein cytochrome bo3 (ubiquinol oxidase) into hybrid vesicles composed of a blend of phospholipids and a block copolymer (PBd-PEO). We demonstrated that these novel membrane environments stabilise the enzymes' activity, prolonging their functional lifetime [Chem. Commun. 52 (2016) 11020-11023]. This approach holds great promise for applications of membrane proteins where enhanced durability, stability and shelf-life will be essential to creating a viable technology. Here we present a detailed account of our methods for membrane protein reconstitution into hybrid vesicles and discuss tips and challenges when using block copolymers compared to pure phospholipid systems that are more common materials for this purpose. We also extend the characterisation of these hybrid vesicles beyond what we have previously reported and show: (i) hybrid membranes are less permeable to protons than phospholipid bilayers; (ii) extended enzyme activity data is presented over a period of 500 days, which fully reveals the truly remarkable enhancement in functional lifetime that hybrid vesicles facilitate.
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4
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Loo SL, Siti W, Thiyagarajan M, Torres J, Wang R, Hu X. Reproducible Preparation of Proteopolymersomes via Sequential Polymer Film Hydration and Membrane Protein Reconstitution. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:12336-12343. [PMID: 28985471 DOI: 10.1021/acs.langmuir.7b02926] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Film rehydration method is commonly used for membrane protein (MP) reconstitution into block copolymer (BCP), but the lack of control in the rehydration step formed a heterogeneous population of proteopolymersomes that interferes with the characterization and performance of devices incorporating them. To improve the self-assembly of polymersomes with simultaneous MP reconstitution, the study reported herein aimed to understand the effects of different variants of the rehydration procedure on the MP reconstitution into BCP membranes. The model MP used in this study was AquaporinZ (AqpZ), an α-helical MP that has been shown to have a high permeation rate exclusive to water molecules. Comparing four rehydration methods differing in the hydration time (i.e., brief wetting or full hydration) and medium (i.e., in buffer or AqpZ stock solution), prehydration with buffer prior to adding AqpZ was found to be most desirable and reproducible reconstitution method because it gave rise to the highest proportion of well-formed vesicles with intact AqpZ functionality as evidenced by the transmission electron microscopy images, dynamic light scattering, and stopped-flow analyses. The mechanisms by which effective AqpZ reconstitution takes place were also investigated and discussed. Small-angle X-ray scattering analysis shows that hydrating the initially dry multilamellar BCP films allows the separation of lamellae. This is anticipated to increase the membrane fluidity that facilitates a fast and spontaneous integration of AqpZ as the detergent concentration is considerably lowered below its critical micelle concentration. Dilution of detergent can result in precipitation of proteins in the absence of well-fluidized membranes for protein integration that underscores the importance of membrane fluidity in MP reconstitution.
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Affiliation(s)
- Siew-Leng Loo
- Singapore Membrane Technology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University , 637141 Singapore
| | - Winna Siti
- Singapore Membrane Technology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University , 637141 Singapore
| | - Monisha Thiyagarajan
- Singapore Membrane Technology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University , 637141 Singapore
| | - Jaume Torres
- Singapore Membrane Technology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University , 637141 Singapore
| | - Rong Wang
- Singapore Membrane Technology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University , 637141 Singapore
| | - Xiao Hu
- Singapore Membrane Technology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University , 637141 Singapore
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5
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Beales PA, Khan S, Muench SP, Jeuken LJC. Durable vesicles for reconstitution of membrane proteins in biotechnology. Biochem Soc Trans 2017; 45:15-26. [PMID: 28202656 PMCID: PMC5310719 DOI: 10.1042/bst20160019] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Revised: 10/14/2016] [Accepted: 10/19/2016] [Indexed: 12/31/2022]
Abstract
The application of membrane proteins in biotechnology requires robust, durable reconstitution systems that enhance their stability and support their functionality in a range of working environments. Vesicular architectures are highly desirable to provide the compartmentalisation to utilise the functional transmembrane transport and signalling properties of membrane proteins. Proteoliposomes provide a native-like membrane environment to support membrane protein function, but can lack the required chemical and physical stability. Amphiphilic block copolymers can also self-assemble into polymersomes: tough vesicles with improved stability compared with liposomes. This review discusses the reconstitution of membrane proteins into polymersomes and the more recent development of hybrid vesicles, which blend the robust nature of block copolymers with the biofunctionality of lipids. These novel synthetic vesicles hold great promise for enabling membrane proteins within biotechnologies by supporting their enhanced in vitro performance and could also contribute to fundamental biochemical and biophysical research by improving the stability of membrane proteins that are challenging to work with.
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Affiliation(s)
- Paul A Beales
- School of Chemistry and Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, U.K.
| | - Sanobar Khan
- School of Chemistry and Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, U.K
| | - Stephen P Muench
- School of Biomedical Sciences and Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, U.K
| | - Lars J C Jeuken
- School of Biomedical Sciences and Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, U.K
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6
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Bartenstein JE, Robertson J, Battaglia G, Briscoe WH. Stability of polymersomes prepared by size exclusion chromatography and extrusion. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.07.032] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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7
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Habel J, Ogbonna A, Larsen N, Krabbe S, Almdal K, Hélix-Nielsen C. How preparation and modification parameters affect PB-PEO polymersome properties in aqueous solution. ACTA ACUST UNITED AC 2016. [DOI: 10.1002/polb.24059] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Joachim Habel
- Department of Environmental Engineering; Technical University of Denmark; Miljøvej, Building 115, 2800 Kgs Lyngby Denmark
- Aquaporin A/S; Ole Maaløes Vej 3 Copenhagen 2200 Denmark
| | - Anayo Ogbonna
- Aquaporin A/S; Ole Maaløes Vej 3 Copenhagen 2200 Denmark
| | - Nanna Larsen
- Copenhagen Biocenter, University of Copenhagen; Ole Maaløes Vej 5 Copenhagen 2200 Denmark
| | - Simon Krabbe
- Department of Biology; University of Copenhagen; August Krogh Building, Universitetsparken 13 Copenhagen 2100 Denmark
| | - Kristoffer Almdal
- Department of Micro- and Nanotechnology; Technical University of Denmark; Produktionstorvet, Building 423, 2800 Kgs Lyngby Denmark
| | - Claus Hélix-Nielsen
- Department of Environmental Engineering; Technical University of Denmark; Miljøvej, Building 115, 2800 Kgs Lyngby Denmark
- Aquaporin A/S; Ole Maaløes Vej 3 Copenhagen 2200 Denmark
- Laboratory for Water Biophysics and Membrane Processes; Faculty of Chemistry and Chemical Engineering, University of Maribor; Smetanova Ulica 17 Maribor 2000 Slovenia
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8
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Yewle J, Wattamwar P, Tao Z, Ostertag EM, Ghoroghchian PP. Progressive Saturation Improves the Encapsulation of Functional Proteins in Nanoscale Polymer Vesicles. Pharm Res 2015; 33:573-89. [PMID: 26508477 DOI: 10.1007/s11095-015-1809-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Accepted: 10/09/2015] [Indexed: 10/22/2022]
Abstract
PURPOSE To develop a technique that maximizes the encapsulation of functional proteins within neutrally charged, fully PEGylated and nanoscale polymer vesicles (i.e., polymersomes). METHODS Three conventional vesicle formation methods were utilized for encapsulation of myoglobin (Mb) in polymersomes of varying size, PEG length, and membrane thickness. Mb concentrations were monitored by UV-Vis spectroscopy, inductively coupled plasma optical emission spectroscopy (ICP-OES) and by the bicinchoninic acid (BCA) assay. Suspensions were subject to protease treatment to differentiate the amounts of surface-associated vs. encapsulated Mb. Polymersome sizes and morphologies were monitored by dynamic light scattering (DLS) and by cryogenic transmission electron microscopy (cryo-TEM), respectively. Binding and release of oxygen were measured using a Hemeox analyzer. RESULTS Using the established "thin-film rehydration" and "direct hydration" methods, Mb was found to be largely surface-associated with negligible aqueous encapsulation within polymersome suspensions. Through iterative optimization, a novel "progressive saturation" technique was developed that greatly increased the final concentrations of Mb (from < 0.5 to > 2.0 mg/mL in solution), the final weight ratio of Mb-to-polymer that could be reproducibly obtained (from < 1 to > 4 w/w% Mb/polymer), as well as the overall efficiency of Mb encapsulation (from < 5 to > 90%). Stable vesicle morphologies were verified by cryo-TEM; the suspensions also displayed no signs of aggregate formation for > 2 weeks as assessed by DLS. "Progressive saturation" was further utilized for the encapsulation of a variety of other proteins, ranging in size from 17 to 450 kDa. CONCLUSIONS Compared to established vesicle formation methods, "progressive saturation" increases the quantities of functional proteins that may be encapsulated in nanoscale polymersomes.
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Affiliation(s)
- Jivan Yewle
- Vindico Pharmaceuticals, Inc., A169 ASTeCC Bldg., Lexington, Kentucky, 40506, USA
| | - Paritosh Wattamwar
- Vindico Pharmaceuticals, Inc., A169 ASTeCC Bldg., Lexington, Kentucky, 40506, USA
| | - Zhimin Tao
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Building 76-261F, Cambridge, Massachusetts, 02139, USA
| | - Eric M Ostertag
- Vindico Pharmaceuticals, Inc., A169 ASTeCC Bldg., Lexington, Kentucky, 40506, USA
| | - P Peter Ghoroghchian
- Vindico Pharmaceuticals, Inc., A169 ASTeCC Bldg., Lexington, Kentucky, 40506, USA. .,Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Building 76-261F, Cambridge, Massachusetts, 02139, USA. .,Dana-Farber Cancer Institute, 450 Brookline Avenue, Boston, Massachusetts, 02115, USA.
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9
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Affiliation(s)
- Regina Bleul
- Department
Nanoparticle Technologies, Fraunhofer ICT-IMM, Carl-Zeiss-Str. 18-20, 55129 Mainz, Germany
| | - Raphael Thiermann
- Department
Nanoparticle Technologies, Fraunhofer ICT-IMM, Carl-Zeiss-Str. 18-20, 55129 Mainz, Germany
| | - Michael Maskos
- Department
Nanoparticle Technologies, Fraunhofer ICT-IMM, Carl-Zeiss-Str. 18-20, 55129 Mainz, Germany
- Institut
für Physikalische Chemie, Johannes Gutenberg-Universität Mainz, Jakob-Welder-Weg 11, 55128 Mainz, Germany
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10
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Tangorra RR, Operamolla A, Milano F, Omar OH, Henrard J, Comparelli R, Italiano F, Agostiano A, De Leo V, Marotta R, Falqui A, Farinola GM, Trotta M. Assembly of a photosynthetic reaction center with ABA tri-block polymersomes: highlights on protein localization. Photochem Photobiol Sci 2015. [DOI: 10.1039/c5pp00189g] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The micelle-to-vesicle transition technique was used to reconstitute the integral membrane protein photosynthetic reaction center (RC) and the position of the RC in the polymersome vesicle was investigated.
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11
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Tai W, Mo R, Di J, Subramanian V, Gu X, Buse JB, Gu Z. Bio-inspired synthetic nanovesicles for glucose-responsive release of insulin. Biomacromolecules 2014; 15:3495-502. [PMID: 25268758 PMCID: PMC4195518 DOI: 10.1021/bm500364a] [Citation(s) in RCA: 116] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Revised: 04/28/2014] [Indexed: 12/16/2022]
Abstract
A new glucose-responsive formulation for self-regulated insulin delivery was constructed by packing insulin, glucose-specific enzymes into pH-sensitive polymersome-based nanovesicles assembled by a diblock copolymer. Glucose can passively transport across the bilayer membrane of the nanovesicle and be oxidized into gluconic acid by glucose oxidase, thereby causing a decrease in local pH. The acidic microenvironment causes the hydrolysis of the pH sensitive nanovesicle that in turn triggers the release of insulin in a glucose responsive fashion. In vitro studies validated that the release of insulin from nanovesicle was effectively correlated with the external glucose concentration. In vivo experiments, in which diabetic mice were subcutaneously administered with the nanovesicles, demonstrate that a single injection of the developed nanovesicle facilitated stabilization of the blood glucose levels in the normoglycemic state (<200 mg/dL) for up to 5 days.
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Affiliation(s)
- Wanyi Tai
- Joint
Department of Biomedical Engineering, University
of North Carolina at Chapel Hill and North Carolina State University, Raleigh, North Carolina 27695, United States
- Center
for Nanotechnology in Drug Delivery and Molecular Pharmaceutics Division, Eshelman
School of Pharmacy, University of North
Carolina at Chapel Hill, Chapel
Hill, North Carolina 27599, United States
| | - Ran Mo
- Joint
Department of Biomedical Engineering, University
of North Carolina at Chapel Hill and North Carolina State University, Raleigh, North Carolina 27695, United States
- Center
for Nanotechnology in Drug Delivery and Molecular Pharmaceutics Division, Eshelman
School of Pharmacy, University of North
Carolina at Chapel Hill, Chapel
Hill, North Carolina 27599, United States
| | - Jin Di
- Joint
Department of Biomedical Engineering, University
of North Carolina at Chapel Hill and North Carolina State University, Raleigh, North Carolina 27695, United States
- Center
for Nanotechnology in Drug Delivery and Molecular Pharmaceutics Division, Eshelman
School of Pharmacy, University of North
Carolina at Chapel Hill, Chapel
Hill, North Carolina 27599, United States
| | - Vinayak Subramanian
- Joint
Department of Biomedical Engineering, University
of North Carolina at Chapel Hill and North Carolina State University, Raleigh, North Carolina 27695, United States
| | - Xiao Gu
- Joint
Department of Biomedical Engineering, University
of North Carolina at Chapel Hill and North Carolina State University, Raleigh, North Carolina 27695, United States
| | - John B. Buse
- Department of Medicine, University
of North Carolina School of Medicine, Chapel Hill, North Carolina 27599, United States
| | - Zhen Gu
- Joint
Department of Biomedical Engineering, University
of North Carolina at Chapel Hill and North Carolina State University, Raleigh, North Carolina 27695, United States
- Center
for Nanotechnology in Drug Delivery and Molecular Pharmaceutics Division, Eshelman
School of Pharmacy, University of North
Carolina at Chapel Hill, Chapel
Hill, North Carolina 27599, United States
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12
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Cui J, van Koeverden MP, Müllner M, Kempe K, Caruso F. Emerging methods for the fabrication of polymer capsules. Adv Colloid Interface Sci 2014; 207:14-31. [PMID: 24210468 DOI: 10.1016/j.cis.2013.10.012] [Citation(s) in RCA: 136] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2013] [Revised: 10/11/2013] [Accepted: 10/13/2013] [Indexed: 12/13/2022]
Abstract
Hollow polymer capsules are attracting increasing research interest due to their potential application as drug delivery vectors, sensors, biomimetic nano- or multi-compartment reactors and catalysts. Thus, significant effort has been directed toward tuning their size, composition, morphology, and functionality to further their application. In this review, we provide an overview of emerging techniques for the fabrication of polymer capsules, encompassing: self-assembly, layer-by-layer assembly, single-step polymer adsorption, bio-inspired assembly, surface polymerization, and ultrasound assembly. These techniques can be applied to prepare polymer capsules with diverse functionality and physicochemical properties, which may fulfill specific requirements in various areas. In addition, we critically evaluate the challenges associated with the application of polymer capsules in drug delivery systems.
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Affiliation(s)
- Jiwei Cui
- Department of Chemical and Biomolecular Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Martin P van Koeverden
- Department of Chemical and Biomolecular Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Markus Müllner
- Department of Chemical and Biomolecular Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Kristian Kempe
- Department of Chemical and Biomolecular Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Frank Caruso
- Department of Chemical and Biomolecular Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia.
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13
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Zope H, Quer CB, Bomans PHH, Sommerdijk NAJM, Kros A, Jiskoot W. Peptide amphiphile nanoparticles enhance the immune response against a CpG-adjuvanted influenza antigen. Adv Healthc Mater 2014; 3:343-8. [PMID: 23983195 DOI: 10.1002/adhm.201300247] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Revised: 07/15/2013] [Indexed: 12/16/2022]
Abstract
Cationic peptide amphiphile nanoparticles are employed for co-delivery of immune modulator CpG and antigen. This results in better targeting to the antigen presenting cells and eliciting strong Th1 response, which is effective against the intracellular pathogens.
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Affiliation(s)
- Harshal Zope
- Department of Soft Matter Chemistry, Leiden Institute of Chemistry; Leiden University; P.O. Box 9502 2300 RA Leiden The Netherlands
| | - Christophe Barnier Quer
- Division of Drug Delivery Technology, Leiden Academic Centre for Drug Research; Leiden University; P.O. Box 9502 2300 RA Leiden The Netherlands
| | - Paul H. H. Bomans
- Laboratory of Materials and Interface Chemistry; Eindhoven University of Technology; P.O. Box 513 5600 MB Eindhoven The Netherlands
| | - Nico A. J. M. Sommerdijk
- Laboratory of Materials and Interface Chemistry; Eindhoven University of Technology; P.O. Box 513 5600 MB Eindhoven The Netherlands
| | - Alexander Kros
- Department of Soft Matter Chemistry, Leiden Institute of Chemistry; Leiden University; P.O. Box 9502 2300 RA Leiden The Netherlands
| | - Wim Jiskoot
- Division of Drug Delivery Technology, Leiden Academic Centre for Drug Research; Leiden University; P.O. Box 9502 2300 RA Leiden The Netherlands
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14
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Kumar M, Habel JEO, Shen YX, Meier WP, Walz T. High-density reconstitution of functional water channels into vesicular and planar block copolymer membranes. J Am Chem Soc 2012; 134:18631-7. [PMID: 23082933 PMCID: PMC3497857 DOI: 10.1021/ja304721r] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
The exquisite selectivity and unique transport properties
of membrane
proteins can be harnessed for a variety of engineering and biomedical
applications if suitable membranes can be produced. Amphiphilic block
copolymers (BCPs), developed as stable lipid analogs, form membranes
that functionally incorporate membrane proteins and are ideal for
such applications. While high protein density and planar membrane
morphology are most desirable, BCP–membrane protein aggregates
have so far been limited to low protein densities in either vesicular
or bilayer morphologies. Here, we used dialysis to reproducibly form
planar and vesicular BCP membranes with a high density of reconstituted
aquaporin-0 (AQP0) water channels. We show that AQP0 retains its biological
activity when incorporated at high density in BCP membranes, and that
the morphology of the BCP–protein aggregates can be controlled
by adjusting the amount of incorporated AQP0. We also show that BCPs
can be used to form two-dimensional crystals of AQP0.
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Affiliation(s)
- Manish Kumar
- Department of Cell Biology, Harvard Medical School, Boston, Massachusetts 02115, United States.
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15
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Song IY, Kim J, Im MJ, Moon BJ, Park T. Synthesis and Self-Assembly of Thiophene-Based All-Conjugated Amphiphilic Diblock Copolymers with a Narrow Molecular Weight Distribution. Macromolecules 2012. [DOI: 10.1021/ma300771g] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- In Young Song
- Department of Chemical Engineering, Pohang University of Science and Technology, San31, Nam-gu,
Pohang, Gyeongbuk, 790-780 (Korea)
| | - Jinseck Kim
- Department of Chemical Engineering, Pohang University of Science and Technology, San31, Nam-gu,
Pohang, Gyeongbuk, 790-780 (Korea)
| | - Min Jeong Im
- Department of Chemical Engineering, Pohang University of Science and Technology, San31, Nam-gu,
Pohang, Gyeongbuk, 790-780 (Korea)
| | - Byung Joon Moon
- Department of Chemical Engineering, Pohang University of Science and Technology, San31, Nam-gu,
Pohang, Gyeongbuk, 790-780 (Korea)
| | - Taiho Park
- Department of Chemical Engineering, Pohang University of Science and Technology, San31, Nam-gu,
Pohang, Gyeongbuk, 790-780 (Korea)
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16
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Cavalli S, Robson Marsden H, Albericio F, Kros A. Peptide Self-Assembly. Supramol Chem 2012. [DOI: 10.1002/9780470661345.smc088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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17
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Chambon P, Blanazs A, Battaglia G, Armes SP. How does cross-linking affect the stability of block copolymer vesicles in the presence of surfactant? LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:1196-1205. [PMID: 22168596 DOI: 10.1021/la204539c] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Block copolymer vesicles are conveniently prepared directly in water at relatively high solids by polymerization-induced self-assembly using an aqueous dispersion polymerization formulation based on 2-hydroxypropyl methacrylate. However, dynamic light scattering studies clearly demonstrate that addition of small molecule surfactants to such linear copolymer vesicles disrupts the vesicular membrane. This causes rapid vesicle dissolution in the case of ionic surfactants, with nonionic surfactants proving somewhat less destructive. To address this problem, glycidyl methacrylate can be copolymerized with 2-hydroxypropyl methacrylate and the resulting epoxy-functional block copolymer vesicles are readily cross-linked in aqueous solution using cheap commercially available polymeric diamines. Such epoxy-amine chemistry confers exceptional surfactant tolerance on the cross-linked vesicles and also leads to a distinctive change in their morphology, as judged by transmission electron microscopy. Moreover, pendent unreacted amine groups confer cationic character on these cross-linked vesicles and offer further opportunities for functionalization.
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Affiliation(s)
- P Chambon
- Dainton Building, Department of Chemistry, The University of Sheffield, Brook Hill, Sheffield, South Yorkshire, S3 7HF United Kingdom
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18
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Ayen WY, Garkhal K, Kumar N. Doxorubicin-loaded (PEG)₃-PLA nanopolymersomes: effect of solvents and process parameters on formulation development and in vitro study. Mol Pharm 2011; 8:466-78. [PMID: 21288047 DOI: 10.1021/mp1003256] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This study is focused on the preparation of doxorubicin-loaded nanopolymersomes (PolyDoxSome) and assessment of the effects of various solvents and process variables on the size and drug loading during preparation of formulation. PolyDoxSome was prepared by nanoprecipitation method using amphiphilic (PEG)₃-PLA copolymer, and the formation of polymersomes was assessed by dynamic light scattering and optical and transmission electron microscopy and evaluated for in vitro release profile and in vitro cytotoxicity. A systematic investigation indicated that solvent composition, order of addition, aqueous phase, copolymer concentration, and external energy input have significant influence on size and dispersity of PolyDoxSome. Under optimized conditions, PolyDoxSome had a size range of 130-180 nm with PDI < 0.2, a zeta potential ∼-8 mV, and a drug loading at ∼11% w/w with an encapsulation efficiency at ∼53% w/w. In vitro release profile of PolyDoxSome at 37 °C demonstrated that doxorubicin release was pH dependent and gave higher release at pH 5.5 in comparison to the release at pH 7.4 (similarity factor, f₂ < 50). PolyDoxSome exhibited enhanced cellular uptake of doxorubicin compared to free doxorubicin solution in MCF-7 cell line and showed a better cytotoxicity of doxorubicin at equivalent dose in nanopolymersomes. In conclusion, size and dispersity were strongly influenced by duration of magnetic stirring and overall composition of organic/aqueous media; however, size and dispersity were retained against different degrees of dilution. PolyDoxSome was able to control the release of doxorubicin in pH dependent manner and effectively deliver the drug in active form to MCF-7 breast cancer cells.
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Affiliation(s)
- Wubeante Yenet Ayen
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research, SAS Nagar, Mohali 160062, Punjab, India
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Kim J, Song IY, Park T. Polymeric vesicles with a hydrophobic interior formed by a thiophene-based all-conjugated amphiphilic diblock copolymer. Chem Commun (Camb) 2011; 47:4697-9. [DOI: 10.1039/c1cc10700c] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Barnier Quer C, Robson Marsden H, Romeijn S, Zope H, Kros A, Jiskoot W. Polymersomes enhance the immunogenicity of influenza subunit vaccine. Polym Chem 2011. [DOI: 10.1039/c1py00010a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Choe UJ, Sun VZ, Tan JKY, Kamei DT. Self-Assembled Polypeptide and Polypeptide Hybrid Vesicles: From Synthesis to Application. Top Curr Chem (Cham) 2011; 310:117-34. [DOI: 10.1007/128_2011_209] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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Marsden HR, Gabrielli L, Kros A. Rapid preparation of polymersomes by a water addition/solvent evaporation method. Polym Chem 2010. [DOI: 10.1039/c0py00172d] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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