1
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Choudhuri K, Bastian JD, Berger JT, de Silva UK, Lapitsky Y. Preparation of polyelectrolyte complex nanoparticles with tunable and narrow size distributions by template polymerization. Colloid Polym Sci 2022. [DOI: 10.1007/s00396-022-04969-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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2
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Tang L, Chen YH, Wang Q, Wang XH, Wu QX, Ding ZF. Microencapsulation of functional ovalbumin and bovine serum albumin with polylysine-alginate complex for sustained protein vehicle's development. Food Chem 2022; 368:130902. [PMID: 34438176 DOI: 10.1016/j.foodchem.2021.130902] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 08/13/2021] [Accepted: 08/16/2021] [Indexed: 12/14/2022]
Abstract
Overcoming harsh gastric environment is still a challenging to bioactive proteins, microencapsulation provides one strategy in designing this protection barrier. In this work, bovine serum albumin and ovalbumin were chosen as model proteins, while polylysine-alginate complex was fabricated for microencapsulation purpose. Both of the protein-loaded microcapsules had regular internal microstructures. The model protein's embedding increased the thermal stability of the microcapsules. Both of the protein-loaded microcapsules had a slow release rate in simulated gastric fluids (pH 3.0), while a sustained release profile in simulated intestinal fluids (pH 6.4), indicating an excellent tolerance to the acidic gastric environment. The microencapsulation process was mild and had no influence on the protein's molecular weight, while a slight peak shifting occurred in the secondary structure of the released proteins. The developed microcapsules could be explored as a kind of vehicle for bioactive proteins applied in functional foods, health care products and medical formulations.
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Affiliation(s)
- Ling Tang
- School of Life Sciences, Anhui University, Hefei, Anhui 230601, China
| | - Yi-Hong Chen
- School of Life Sciences, Anhui University, Hefei, Anhui 230601, China
| | - Qiong Wang
- School of Life Sciences, Anhui University, Hefei, Anhui 230601, China
| | - Xiao-Hui Wang
- School of Life Sciences, Anhui University, Hefei, Anhui 230601, China
| | - Qing-Xi Wu
- School of Life Sciences, Anhui University, Hefei, Anhui 230601, China; Anhui Key Laboratory of Modern Biomanufacturing, Hefei, Anhui 230601, China; Key Laboratory of Eco-engineering and Biotechnology of Anhui Province, Hefei, Anhui 230601, China; Department of Chemistry, The University of Western Ontario, London, Ontario N6A 5B7, Canada.
| | - Zhi-Feng Ding
- Department of Chemistry, The University of Western Ontario, London, Ontario N6A 5B7, Canada
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3
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Mehan S, Herrmann L, Chapel JP, Jestin J, Berret JF, Cousin F. The desalting/salting pathway: a route to form metastable aggregates with tuneable morphologies and lifetimes. SOFT MATTER 2021; 17:8496-8505. [PMID: 34474458 DOI: 10.1039/d1sm00260k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
We investigate the formation/re-dissociation mechanisms of hybrid complexes made from negatively charged PAA2k coated γ-Fe2O3 nanoparticles (NP) and positively charged polycations (PDADMAC) in aqueous solution in the regime of very high ionic strength (I). When the building blocks are mixed at large ionic strength (1 M NH4Cl), the electrostatic interaction is screened and complexation does not occur. If the ionic strength is then lowered down to a targeted ionic strength Itarget, there is a critical threshold Ic = 0.62 M at which complexation occurs, that is independent of the charge ratio Z and the pathway used to reduce salinity (drop-by-drop mixing or fast mixing). If salt is added back up to 1 M, the transition is not reversible and persistent out-of-equilibrium aggregates are formed. The lifetimes of such aggregates depends on Itarget: the closer Itarget to Ic is, the more difficult it is to dissolve the aggregates. Such peculiar behavior is driven by the inner structure of the complexes that are formed after desalting. When Itarget is far below Ic, strong electrostatic interactions induce the formation of dense, compact and frozen aggregates. Such aggregates can only poorly reorganize further on with time, which makes their dissolution upon resalting almost reversible. Conversely, when Itarget is close to Ic more open aggregates are formed due to weaker electrostatic interactions upon desalting. The system can thus rearrange with time to lower its free energy and reach more stable out-of-equilibrium states which are very difficult to dissociate back upon resalting, even at very high ionic strength.
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Affiliation(s)
- Sumit Mehan
- Laboratoire Léon Brillouin, Université Paris-Saclay, CEA Saclay, 91191 Gif sur Yvette Cedex, France.
| | - Laure Herrmann
- Université de Paris, CNRS, Matière et systèmes complexes, 75013 Paris, France
| | - Jean-Paul Chapel
- Centre de Recherche Paul Pascal (CRPP), UMR CNRS 5031, Université de Bordeaux, 33600 Pessac, France
| | - Jacques Jestin
- Laboratoire Léon Brillouin, Université Paris-Saclay, CEA Saclay, 91191 Gif sur Yvette Cedex, France.
| | | | - Fabrice Cousin
- Laboratoire Léon Brillouin, Université Paris-Saclay, CEA Saclay, 91191 Gif sur Yvette Cedex, France.
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4
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Demirelli M, Peyre V, Sirieix-Plénet J, Malikova N, Fresnais J. Influence of polycation/cation competition on the aggregation threshold of magnetic nanoparticles. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2020.125876] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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5
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Glagoleva AA, Larin DE, Vasilevskaya VV. Unusual Structures of Interpolyelectrolyte Complexes: Vesicles and Perforated Vesicles. Polymers (Basel) 2020; 12:E871. [PMID: 32290145 PMCID: PMC7240553 DOI: 10.3390/polym12040871] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Revised: 04/03/2020] [Accepted: 04/04/2020] [Indexed: 12/29/2022] Open
Abstract
By means of computer simulation and analytical theory, we first demonstrated that the interpolyelectrolyte complexes in dilute solution can spontaneously form hollow spherical particles with thin continuous shells (vesicles) or with porous shells (perforated vesicles) if the polyions forming the complex differ in their affinity for the solvent. The solvent was considered good for the nonionic groups of one macroion and its quality was varied for the nonionic groups of the other macroion. It was found that if the electrostatic interactions are weak compared to the attraction induced by the hydrophobicity of the monomer units, the complex in poor solvent tends to form "dense core-loose shell" structures of different shapes. The strong electrostatic interactions favor the formation of the layered, the hollow, and the filled structured morphologies with the strongly segregated macroions. Vesicles with perforated walls were distinguished as the intermediate between the vesicular and the structured solid morphologies. The order parameter based on the spherical harmonics expansion was introduced to calculate the pore distribution in the perforated vesicles depending on the solvent quality. The conditions of the core-shell and hollow vesicular-like morphologies formation were determined theoretically via the calculations of their free energy. The results of the simulation and theoretical approaches are in good agreement.
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Affiliation(s)
| | | | - V. V. Vasilevskaya
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow 119991, Russia; (A.A.G.); (D.E.L.)
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6
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Liu Q, Välimäki S, Shaukat A, Shen B, Linko V, Kostiainen MA. Serum Albumin-Peptide Conjugates for Simultaneous Heparin Binding and Detection. ACS OMEGA 2019; 4:21891-21899. [PMID: 31891067 PMCID: PMC6933801 DOI: 10.1021/acsomega.9b02883] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Accepted: 11/26/2019] [Indexed: 05/14/2023]
Abstract
Heparin is a polysaccharide-based anticoagulant agent, which is widely used in surgery and blood transfusion. However, overdosage of heparin may cause severe side effects such as bleeding and low blood platelet count. Currently, there is only one clinically licensed antidote for heparin: protamine sulfate, which is known to provoke adverse effects. In this work, we present a stable and biocompatible alternative for protamine sulfate that is based on serum albumin, which is conjugated with a variable number of heparin-binding peptides. The heparin-binding efficiency of the conjugates was evaluated with methylene blue displacement assay, dynamic light scattering, and anti-Xa assay. We found that multivalency of the peptides played a key role in the observed heparin-binding affinity and complex formation. The conjugates had low cytotoxicity and low hemolytic activity, indicating excellent biocompatibility. Furthermore, a sensitive DNA competition assay for heparin detection was developed. The detection limit of heparin was 0.1 IU/mL, which is well below its therapeutic range (0.2-0.4 IU/mL). Such biomolecule-based systems are urgently needed for next-generation biocompatible materials capable of simultaneous heparin binding and sensing.
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Affiliation(s)
- Qing Liu
- Biohybrid
Materials, Department of Bioproducts and Biosystems and HYBER Center of Excellence, Department
of Applied Physics, Aalto University, 00076 Aalto, Finland
| | - Salla Välimäki
- Biohybrid
Materials, Department of Bioproducts and Biosystems and HYBER Center of Excellence, Department
of Applied Physics, Aalto University, 00076 Aalto, Finland
| | - Ahmed Shaukat
- Biohybrid
Materials, Department of Bioproducts and Biosystems and HYBER Center of Excellence, Department
of Applied Physics, Aalto University, 00076 Aalto, Finland
| | - Boxuan Shen
- Biohybrid
Materials, Department of Bioproducts and Biosystems and HYBER Center of Excellence, Department
of Applied Physics, Aalto University, 00076 Aalto, Finland
| | - Veikko Linko
- Biohybrid
Materials, Department of Bioproducts and Biosystems and HYBER Center of Excellence, Department
of Applied Physics, Aalto University, 00076 Aalto, Finland
| | - Mauri A. Kostiainen
- Biohybrid
Materials, Department of Bioproducts and Biosystems and HYBER Center of Excellence, Department
of Applied Physics, Aalto University, 00076 Aalto, Finland
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7
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Bravo-Anaya L, Garbay B, Nando-Rodríguez J, Carvajal Ramos F, Ibarboure E, Bathany K, Xia Y, Rosselgong J, Joucla G, Garanger E, Lecommandoux S. Nucleic acids complexation with cationic elastin-like polypeptides: Stoichiometry and stability of nano-assemblies. J Colloid Interface Sci 2019; 557:777-792. [DOI: 10.1016/j.jcis.2019.09.054] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2019] [Revised: 09/13/2019] [Accepted: 09/16/2019] [Indexed: 02/01/2023]
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8
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Glagoleva AA, Vasilevskaya VV. On Conditions of Formation of Hollow Particles by an Interpolylectrolyte Complex. POLYMER SCIENCE SERIES A 2019. [DOI: 10.1134/s0965545x19060038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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9
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Barclay TG, Day CM, Petrovsky N, Garg S. Review of polysaccharide particle-based functional drug delivery. Carbohydr Polym 2019; 221:94-112. [PMID: 31227171 PMCID: PMC6626612 DOI: 10.1016/j.carbpol.2019.05.067] [Citation(s) in RCA: 199] [Impact Index Per Article: 39.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 04/26/2019] [Accepted: 05/22/2019] [Indexed: 01/06/2023]
Abstract
This review investigates the significant role polysaccharide particles play in functional drug delivery. The importance of these systems is due to the wide variety of polysaccharides and their natural source meaning that they can provide biocompatible and biodegradable systems with a range of both biological and chemical functionality valuable for drug delivery. This functionality includes protection and presentation of working therapeutics through avoidance of the reticuloendothelial system, stabilization of biomacromolecules and increasing the bioavailability of incorporated small molecule drugs. Transport of the therapeutic is also key to the utility of polysaccharide particles, moving drugs from the site of administration through mucosal binding and transport and using chemistry, size and receptor mediated drug targeting to specific tissues. This review also scrutinizes the methods of synthesizing and constructing functional polysaccharide particle drug delivery systems that maintain and extend the functionality of the natural polysaccharides.
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Affiliation(s)
- Thomas G Barclay
- School of Pharmacy and Medical Science, University of South Australia, Adelaide, SA 5000, Australia.
| | - Candace Minhthu Day
- School of Pharmacy and Medical Science, University of South Australia, Adelaide, SA 5000, Australia.
| | - Nikolai Petrovsky
- Vaxine Pty Ltd, 1 Flinders Drive, Bedford Park, SA 5042, Australia; Department of Endocrinology, Flinders Medical Centre/Flinders University, Bedford Park, SA 5042, Australia.
| | - Sanjay Garg
- School of Pharmacy and Medical Science, University of South Australia, Adelaide, SA 5000, Australia.
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10
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Petrova VA, Elokhovskiy VY, Raik SV, Poshina DN, Romanov DP, Skorik YA. Alginate Gel Reinforcement with Chitin Nanowhiskers Modulates Rheological Properties and Drug Release Profile. Biomolecules 2019; 9:E291. [PMID: 31331095 PMCID: PMC6680783 DOI: 10.3390/biom9070291] [Citation(s) in RCA: 33] [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: 06/24/2019] [Revised: 07/17/2019] [Accepted: 07/18/2019] [Indexed: 01/15/2023] Open
Abstract
Hydrogels are promising materials for various applications, including drug delivery, tissue engineering, and wastewater treatment. In this work, we designed an alginate (ALG) hydrogel containing partially deacetylated chitin nanowhiskers (CNW) as a filler. Gelation in the system occurred by both the protonation of alginic acid and the formation of a polyelectrolyte complex with deacetylated CNW surface chains. Morphological changes in the gel manifested as a honeycomb structure in the freeze-dried gel, unlike the layered structure of an ALG gel. Disturbance of the structural orientation of the gels by the introduction of CNW was also expressed as a decrease in the intensity of X-ray diffraction reflexes. All studied systems were non-Newtonian liquids that violated the Cox-Merz rule. An increase in the content of CNW in the ALG-CNW hydrogel resulted in increases in the yield stress, maximum Newtonian viscosity, and relaxation time. Inclusion of CNW prolonged the release of tetracycline due to changes in diffusion. The first phases (0-5 h) of the release profiles were well described by the Higuchi model. ALG-CNW hydrogels may be of interest as soft gels for controlled topical or intestinal drug delivery.
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Affiliation(s)
- Valentina A Petrova
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. V.O. 31, St Petersburg 199004, Russia
| | - Vladimir Y Elokhovskiy
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. V.O. 31, St Petersburg 199004, Russia
| | - Sergei V Raik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. V.O. 31, St Petersburg 199004, Russia
| | - Daria N Poshina
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. V.O. 31, St Petersburg 199004, Russia
| | - Dmitry P Romanov
- Institute of Silicate Chemistry of the Russian Academy of Sciences, Adm. Makarova emb. 2, St. Petersburg 199034, Russia
| | - Yury A Skorik
- Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoy pr. V.O. 31, St Petersburg 199004, Russia.
- Almazov National Medical Research Centre, Akkuratova str. 2., St. Petersburg 197341, Russia.
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11
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Eicher AC, Dobler D, Kiselmann C, Schmidts T, Runkel F. Dermal delivery of therapeutic DNAzymes via chitosan hydrogels. Int J Pharm 2019; 563:208-216. [DOI: 10.1016/j.ijpharm.2019.04.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 03/07/2019] [Accepted: 04/02/2019] [Indexed: 10/27/2022]
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12
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Bernkop-Schnürch A. Strategies to overcome the polycation dilemma in drug delivery. Adv Drug Deliv Rev 2018; 136-137:62-72. [PMID: 30059702 DOI: 10.1016/j.addr.2018.07.017] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2018] [Revised: 07/07/2018] [Accepted: 07/25/2018] [Indexed: 12/23/2022]
Abstract
Because of polycationic auxiliary agents such as chitosan, polyethyleneimine and cell penetrating peptides as well as cationic lipids assembling to polycationic systems, drug carriers can tightly interact with cell membranes exhibiting a high-density anionic charge. Because of these interactions the cell membrane is depolarized and becomes vulnerable to various uptake mechanisms. On their way to the target site, however, the polycationic character of all these drug carriers is eliminated by polyanionic macromolecules such as mucus glycoproteins, serum proteins, proteoglycans of the extracellular matrix (ECM) and polyanionic surface substructures of non-target cells such as red blood cells. Strategies to overcome this polycation dilemma are focusing on a pH-, redox- or enzyme-triggered charge conversion at the target site. The pH-triggered systems are making use of a slight acidic environment at the target site such as in case of solid tumors, inflammatory tissue and ischemic tissue. Due to a pH shift from 7.2 to slightly acidic mainly amino substructures of polymeric excipients are protonated or shielding groups such as 2,3 dimethylmaleic acid are cleaved off unleashing the underlying cationic character. Redox-triggered systems are utilizing disulfide linkages to bulky side chains such as PEGs masking the polycationic character. Under mild reducing conditions such as in the tumor microenvironment these disulfide bonds are cleaved. Enzyme-triggered systems are targeting enzymes such as alkaline phosphatase, matrix metalloproteinases or hyaluronidase in order to eliminate anionic moieties via enzymatic cleavage resulting in a charge conversion from negative to positive. Within this review an overview about the pros and cons of these systems is provided.
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Affiliation(s)
- Andreas Bernkop-Schnürch
- Institute of Pharmacy/Department of Pharmaceutical Technology, University of Innsbruck Center for Chemistry and Biomedicine, Innrain 80/82, Room L.04.231, 6020 Innsbruck, Austria; ThioMatrix Forschungs- und Entwicklungs GmbH, Trientlgasse 65, 6020 Innsbruck, Austria.
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13
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Pectins functionalized biomaterials; a new viable approach for biomedical applications: A review. Int J Biol Macromol 2017; 101:254-272. [DOI: 10.1016/j.ijbiomac.2017.03.029] [Citation(s) in RCA: 160] [Impact Index Per Article: 22.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2017] [Revised: 03/03/2017] [Accepted: 03/06/2017] [Indexed: 12/31/2022]
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14
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Debele TA, Mekuria SL, Tsai HC. Polysaccharide based nanogels in the drug delivery system: Application as the carrier of pharmaceutical agents. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 68:964-981. [DOI: 10.1016/j.msec.2016.05.121] [Citation(s) in RCA: 124] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 05/23/2016] [Accepted: 05/27/2016] [Indexed: 11/08/2022]
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15
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Etrych T, Boustta M, Leclercq L, Vert M. Release of Polyanions from Polyelectrolyte Complexes by Selective Degradation of the Polycation. J BIOACT COMPAT POL 2016. [DOI: 10.1177/0883911506062974] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
One of the major problems associated with analyzing polyelectrolyte complexes is the separation of strongly bound oppositely charged polymeric components. As part of a work aimed at better understanding the factors that affect polyelectrolyte complex formation and stability, an investigation of the possibility to release and analyze the polyanion, after hydrolytic or enzymatic degradation of the partner polycation, was made. Mixtures of poly(acrylic acid) or poly(L-lysine citramide) polyanions with poly(L-lysine) or poly(amino serinate) polycations were investigated. For each polycation-polyanion couple, four complex fractions were obtained by adding the polycation to the polyanion according to a titration protocol. The selective degradation of the polycation within the different complex fractions was investigated after the complex was disrupted with a NaCl solution. The molecular weights of the recovered polyanionic macromolecules were assessed by both static light scattering and size exclusion chromatography. The data supported previous findings that complexation was selective according to the molecular weight of the polyanion for a given polycation. The lower the degree of neutralization of the polyanion negative charges by the polycation positive charges, the greater the molecular weight of the complexed polyanionic macromolecules.
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Affiliation(s)
- T. Etrych
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky sq. 2, Prague 6, 162 06, Czech Republic
| | - M. Boustta
- Research Centre for Artificial Biopolymers - UMR CNRS 5473, University of Montpellier 1 - Faculty of Pharmacy, 15 Avenue Charles Flahault - BP 14491, F-34093 Montpellier Cedex 5, France
| | - L. Leclercq
- Research Centre for Artificial Biopolymers - UMR CNRS 5473, University of Montpellier 1 - Faculty of Pharmacy, 15 Avenue Charles Flahault - BP 14491, F-34093 Montpellier Cedex 5, France,
| | - M. Vert
- Research Centre for Artificial Biopolymers - UMR CNRS 5473, University of Montpellier 1 - Faculty of Pharmacy, 15 Avenue Charles Flahault - BP 14491, F-34093 Montpellier Cedex 5, France
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Nanoparticle diffusion within intestinal mucus: Three-dimensional response analysis dissecting the impact of particle surface charge, size and heterogeneity across polyelectrolyte, pegylated and viral particles. Eur J Pharm Biopharm 2015; 97:230-8. [DOI: 10.1016/j.ejpb.2015.01.023] [Citation(s) in RCA: 95] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Revised: 12/31/2014] [Accepted: 01/25/2015] [Indexed: 11/18/2022]
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17
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Amphiphilic poly(amino acid) based micelles applied to drug delivery: The in vitro and in vivo challenges and the corresponding potential strategies. J Control Release 2015; 199:84-97. [DOI: 10.1016/j.jconrel.2014.12.012] [Citation(s) in RCA: 101] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2014] [Revised: 12/09/2014] [Accepted: 12/10/2014] [Indexed: 01/08/2023]
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18
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Boustta M, Leclercq L, Vert M, Vasilevskaya VV. Experimental and Theoretical Studies of Polyanion–Polycation Complexation in Salted Media in the Context of Nonviral Gene Transfection. Macromolecules 2014. [DOI: 10.1021/ma500447k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Mahfoud Boustta
- Max
Mousseron Institute of Biomolecules, UMR CNRS 5247, Faculty of Pharmacy, University Montpellier 1, 15 avenue Charles Flahault, BP
14491, 34093 Montpellier Cedex 5, France
| | - Laurent Leclercq
- Max
Mousseron Institute of Biomolecules, UMR CNRS 5247, Faculty of Pharmacy, University Montpellier 1, 15 avenue Charles Flahault, BP
14491, 34093 Montpellier Cedex 5, France
| | - Michel Vert
- Max
Mousseron Institute of Biomolecules, UMR CNRS 5247, Faculty of Pharmacy, University Montpellier 1, 15 avenue Charles Flahault, BP
14491, 34093 Montpellier Cedex 5, France
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19
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Tsai RY, Chen PW, Kuo TY, Lin CM, Wang DM, Hsien TY, Hsieh HJ. Chitosan/pectin/gum Arabic polyelectrolyte complex: Process-dependent appearance, microstructure analysis and its application. Carbohydr Polym 2014; 101:752-9. [DOI: 10.1016/j.carbpol.2013.10.008] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2012] [Revised: 09/29/2013] [Accepted: 10/01/2013] [Indexed: 11/24/2022]
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20
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Preparation of poly(serine ester)s by ring-opening polymerization of N-trityl serine lactone under catalysis of ZnEt2. Chem Res Chin Univ 2013. [DOI: 10.1007/s40242-013-2355-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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21
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Dai F, Liu Y, Wang W, Liu W. Stable gene transfection mediated by polysulfobetaine/PDMAEMA diblock copolymer in salted medium. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 24:330-43. [DOI: 10.1080/09205063.2012.690279] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Fengying Dai
- a School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials , Tianjin University , 92 Weijin Road, Nankai District, Tianjin , 300072 , People’s Republic of China
- b National Key Laboratory of Biochemical Engineering, Institute of Process Engineering , Chinese Academy Of Sciences , No. 1 Zhongguancun North Second Street, Beijing , 100190 , People’s Republic of China
| | - Yuan Liu
- a School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials , Tianjin University , 92 Weijin Road, Nankai District, Tianjin , 300072 , People’s Republic of China
| | - Wei Wang
- a School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials , Tianjin University , 92 Weijin Road, Nankai District, Tianjin , 300072 , People’s Republic of China
| | - Wenguang Liu
- a School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials , Tianjin University , 92 Weijin Road, Nankai District, Tianjin , 300072 , People’s Republic of China
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22
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Debus H, Beck-Broichsitter M, Kissel T. Optimized preparation of pDNA/poly(ethylene imine) polyplexes using a microfluidic system. LAB ON A CHIP 2012; 12:2498-2506. [PMID: 22552347 DOI: 10.1039/c2lc40176b] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Poly(ethylene imine) (PEI) is an established non-viral vector system for the delivery of various nucleic acids in gene therapy applications. Polyelectrolyte complexes between both compounds, so called polyplexes, are formed by electrostatic interactions of oppositely charged macromolecules and are thought to facilitate uptake into cells. Such complexes form spontaneously and on lab scale they are usually prepared by mixing solutions through pipetting. Hence, an optimized preparation procedure allowing the scale-up of well-defined polyplexes would be of general interest. We developed a new method for microfluidic polyplex preparation on a chip. The mixing behaviour within the microfluidic channels was evaluated. Polyplexes with PEI and plasmid DNA were prepared using this method, in comparison to the standard pipetting procedure. Sizes and polydispersity indices of these complexes were examined. The influence of various parameters on the polyplex characteristics and the suitability of this production procedure for other PEI-based complexes were also evaluated. It was shown that polyplexes could easily be prepared by microfluidics. The ratio of PEI to DNA was most important for the formation of small polyplexes, whereas other parameters had minor influence. The size of polyplexes prepared with this new method was observed to be relatively constant between 140 nm and 160 nm over a wide range of complex concentrations. In comparison, the size of polyplexes prepared by pipetting (approximately 90 nm to 160 nm) varied considerably. The versatility of this system was demonstrated with different (targeted) PEI-based vectors for the formation of complexes with pDNA and siRNA. In conclusion, polyplex preparation using microfluidics could be a promising alternative to the standard pipetting method due to its suitability for preparation of well-defined complexes with different compositions over a wide range of concentrations.
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Affiliation(s)
- Heiko Debus
- Philipps-Universität Marburg, Department of Pharmaceutics and Biopharmacy, Ketzerbach 63, 35032, Marburg, Germany
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Lazutin AA, Semenov AN, Vasilevskaya VV. Polyelectrolyte Complexes Consisting of Macromolecules With Varied Stiffness: Computer Simulation. MACROMOL THEOR SIMUL 2012. [DOI: 10.1002/mats.201100097] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Sabar M, Samein L, Sahib HB. Some Variables Affecting the Formulation of Ketoprofen Sustained Release Oral Tablet using Polyelectrolyte Complex as a Matrix Former. ACTA ACUST UNITED AC 2011. [DOI: 10.3923/jpahs.2011.1.15] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Steele TWJ, Zhao X, Tarcha P, Kissel T. Factors influencing polycation/siRNA colloidal stability toward aerosol lung delivery. Eur J Pharm Biopharm 2011; 80:14-24. [PMID: 21924355 DOI: 10.1016/j.ejpb.2011.08.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2011] [Revised: 08/24/2011] [Accepted: 08/31/2011] [Indexed: 01/25/2023]
Abstract
Hexanediol diacrylate cross-linked oligoethylenimine (OEI-HD) is a non-viral polymeric vector designed to deliver siRNA. To achieve safe and effective in vivo siRNA delivery using this vector, the polyplex must have sufficient colloidal stability if administered intravenously or nebulized for delivery by the pulmonary route. In this study, polyplexes from OEI-HD and siRNA were formulated for aerosol-based lung delivery, regarding their colloidal stability, optimal particle size, and in vitro biological activity. Herein, we describe how these properties are dependent upon the polymer-to siRNA weight ratios, buffer composition they were complexed in, PEG-grafting, and the addition of commercial lung surfactants and/or non-ionic surfactants to the formulation. Lastly, the effects of nebulization of the formulation into aerosol droplets, on the polyplex particle size and transfection efficiency, were evaluated. Polyplex size was monitored for up to 2 h after polyplex formation to determine the extent of aggregation and final particle sizes when stability was achieved. Our results suggest that PEG-grafting and polyethylenimine-PEG mixing were effective in achieving colloidal stability in isotonic saline buffers. In addition, colloidal stability was achieved in isotonic glucose buffers using commercially available non-ionic surfactant Pluronic™ P68 or the lung-derived surfactant Alveofact™. The smallest particle size, 140 nm, was obtained with Pluronic™ F68. For transfection efficiency, both Alveofact™ and Pluronic™ F68 achieved equal or better transfection when added to the OEI-HD/siRNA polyplexes. For long term storage of OEI-HD/siRNA formulations, we propose a lyophilization method that created in situ polyplexes upon addition of water. Preparation of OEI-HD/siRNA polyplexes by this method allowed dry storage at room temperature for up to the 3 months. In conclusion, we have identified approaches to achieve formulation and colloidal stability of OEI-HD/siRNA complexes, a step toward successful application of polyplexes for in vivo siRNA delivery.
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Affiliation(s)
- Terry W J Steele
- School of Material Science & Engineering, Nanyang Technological University, Singapore, Singapore.
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Colloidal polyelectrolyte complexes of chitosan and dextran sulfate towards versatile nanocarriers of bioactive molecules. Eur J Pharm Biopharm 2011; 78:10-8. [DOI: 10.1016/j.ejpb.2010.12.001] [Citation(s) in RCA: 100] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2010] [Revised: 12/01/2010] [Accepted: 12/01/2010] [Indexed: 11/16/2022]
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27
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Can the interaction between the antimicrobial peptide LL-37 and alginate be exploited for the formulation of new biomaterials with antimicrobial properties? Carbohydr Polym 2011. [DOI: 10.1016/j.carbpol.2010.08.020] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Weber C, Drogoz A, David L, Domard A, Charles MH, Verrier B, Delair T. Polysaccharide-based vaccine delivery systems: Macromolecular assembly, interactions with antigen presenting cells, and in vivo immunomonitoring. J Biomed Mater Res A 2010; 93:1322-34. [PMID: 19859973 DOI: 10.1002/jbm.a.32605] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Using a strategy of macromolecular assembly, a colloidal vaccine delivery system was obtained from chitosan and dextran sulfate and loaded with an antigenic protein (p24, the capsid protein of HIV-1). The colloidal polyelectrolyte complexes (PECs) were obtained by charge neutralization of the polyanion and polycation at a charge ratio (n(+)/n(-)) of 2 (CHDS). The conditions of assembly were tuned to maintain the colloidal properties of the carrier in high salt environment. The relative molar masses of the two polyions and the degree of acetylation (DA) of chitosan were essential parameters to achieve this goal, and this could be related to the nanometric scale organization of the colloids observed by Small Angle X-rays Scattering experiments. The binding of p24 to the colloidal carrier was achieved and the release of the antigen was investigated. Antigen presenting cells [dendritic cells (DCs)], obtained from monocytes, could internalize the colloids. Immature DCs (iDCs) were not matured by the colloidal PECs either loaded or not loaded with p24, as proved by Fluorescent Activated Cell Sorting (FACS) analysis. Despite this lack of in vitro interaction, a specific immune response was observed in mice with a high production of antibodies, after subcutaneous injection. The analysis of the interleukin production shows that both the cellular and the humoral responses were stimulated. This work brings a physico-chemical insight on polysaccharide-based antigen delivery systems and opens up new perspectives for their use as vaccine carriers.
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Affiliation(s)
- Caroline Weber
- Institut de Biologie et Chimie des Protéines, 69367 Lyon Cedex 07, France
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Leclercq L, Boustta M, Rixte J, Vert M. Degradability of poly(l-lysine) and poly(dl-aminoserinate) complexed with a polyanion under conditions modelling physico-chemical characteristics of body fluids. J Colloid Interface Sci 2010; 350:459-64. [DOI: 10.1016/j.jcis.2010.07.015] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2010] [Revised: 07/05/2010] [Accepted: 07/09/2010] [Indexed: 10/19/2022]
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Hamman JH. Chitosan based polyelectrolyte complexes as potential carrier materials in drug delivery systems. Mar Drugs 2010; 8:1305-22. [PMID: 20479980 PMCID: PMC2866488 DOI: 10.3390/md8041305] [Citation(s) in RCA: 360] [Impact Index Per Article: 25.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2010] [Revised: 03/17/2010] [Accepted: 03/22/2010] [Indexed: 11/16/2022] Open
Abstract
Chitosan has been the subject of interest for its use as a polymeric drug carrier material in dosage form design due to its appealing properties such as biocompatibility, biodegradability, low toxicity and relatively low production cost from abundant natural sources. However, one drawback of using this natural polysaccharide in modified release dosage forms for oral administration is its fast dissolution rate in the stomach. Since chitosan is positively charged at low pH values (below its pK(a) value), it spontaneously associates with negatively charged polyions in solution to form polyelectrolyte complexes. These chitosan based polyelectrolyte complexes exhibit favourable physicochemical properties with preservation of chitosan's biocompatible characteristics. These complexes are therefore good candidate excipient materials for the design of different types of dosage forms. It is the aim of this review to describe complexation of chitosan with selected natural and synthetic polyanions and to indicate some of the factors that influence the formation and stability of these polyelectrolyte complexes. Furthermore, recent investigations into the use of these complexes as excipients in drug delivery systems such as nano- and microparticles, beads, fibers, sponges and matrix type tablets are briefly described.
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Affiliation(s)
- Josias H Hamman
- Department of Pharmaceutical Sciences, Tshwane University of Technology, Private Bag X680, Pretoria, 0001, South Africa.
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Krotova MK, Vasilevskaya VV, Khokhlov AR. The effect of a low-molecular-mass salt on stoichiometric polyelectrolyte complexes composed of oppositely charged macromolecules with different solvent affinities. POLYMER SCIENCE SERIES A 2009. [DOI: 10.1134/s0965545x09100046] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Krotova MK, Vasilevskaya VV, Leclercq L, Boustta M, Vert M, Khokhlov AR. Salt Effects on Complexes of Oppositely Charged Macromolecules Having Different Affinity to Water. Macromolecules 2009. [DOI: 10.1021/ma900204u] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Maria K. Krotova
- Physics Department, M.V. Lomonosov Moscow State University, Moscow 119992, Russia
| | - Valentina V. Vasilevskaya
- Nesmeyanov Institute of Organoelemental Compounds (INEOS), Russian Academy of Sciences, Vavilova ul. 28, Moscow 119991, Russia
| | - Laurent Leclercq
- Institute of Biomolecules Max Mousseron, UMR CNRS 5247, Equipe CRBA, Faculté de Pharmacie, 15 Avenue Charles Flahaut, BP 14491, 34093 Montpellier Cedex 5, France
| | - Mahfoud Boustta
- Institute of Biomolecules Max Mousseron, UMR CNRS 5247, Equipe CRBA, Faculté de Pharmacie, 15 Avenue Charles Flahaut, BP 14491, 34093 Montpellier Cedex 5, France
| | - Michel Vert
- Institute of Biomolecules Max Mousseron, UMR CNRS 5247, Equipe CRBA, Faculté de Pharmacie, 15 Avenue Charles Flahaut, BP 14491, 34093 Montpellier Cedex 5, France
| | - Alexei R. Khokhlov
- Physics Department, M.V. Lomonosov Moscow State University, Moscow 119992, Russia
- Nesmeyanov Institute of Organoelemental Compounds (INEOS), Russian Academy of Sciences, Vavilova ul. 28, Moscow 119991, Russia
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Hu Y, Fu X, Chen XD, Yang J, Yang LS, Zhang MQ. Association behaviors between carboxymethyl cellulose and polylactic acid revealed by resonance light scattering spectra. Polym Bull (Berl) 2009. [DOI: 10.1007/s00289-008-0032-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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34
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Drogoz A, Munier S, Verrier B, David L, Domard A, Delair T. Towards Biocompatible Vaccine Delivery Systems: Interactions of Colloidal PECs Based on Polysaccharides with HIV-1 p24 Antigen. Biomacromolecules 2008; 9:583-91. [DOI: 10.1021/bm701154h] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Alexandre Drogoz
- Unité Mixte CNRS-BioMérieux, UMR 2714, ENS Lyon, 46 Allée d’Italie, 69364 Lyon Cedex 07, France, Institut de Biologie et Chimie des Protéines, UMR 5086 CNRS, 7 Passage du Vercors, 69967 Lyon Cedex 07, France, and Laboratoire des Matériaux Polymères et des Biomatériaux, UMR CNRS 5223 Ingénierie des Matériaux Polymères, Université de Lyon, Université Lyon 1, Domaine Scientifique de la Doua, Bât. ISTIL, 15 Bd. A. Latarjet, 69622 Villeurbanne Cedex, France
| | - Séverine Munier
- Unité Mixte CNRS-BioMérieux, UMR 2714, ENS Lyon, 46 Allée d’Italie, 69364 Lyon Cedex 07, France, Institut de Biologie et Chimie des Protéines, UMR 5086 CNRS, 7 Passage du Vercors, 69967 Lyon Cedex 07, France, and Laboratoire des Matériaux Polymères et des Biomatériaux, UMR CNRS 5223 Ingénierie des Matériaux Polymères, Université de Lyon, Université Lyon 1, Domaine Scientifique de la Doua, Bât. ISTIL, 15 Bd. A. Latarjet, 69622 Villeurbanne Cedex, France
| | - Bernard Verrier
- Unité Mixte CNRS-BioMérieux, UMR 2714, ENS Lyon, 46 Allée d’Italie, 69364 Lyon Cedex 07, France, Institut de Biologie et Chimie des Protéines, UMR 5086 CNRS, 7 Passage du Vercors, 69967 Lyon Cedex 07, France, and Laboratoire des Matériaux Polymères et des Biomatériaux, UMR CNRS 5223 Ingénierie des Matériaux Polymères, Université de Lyon, Université Lyon 1, Domaine Scientifique de la Doua, Bât. ISTIL, 15 Bd. A. Latarjet, 69622 Villeurbanne Cedex, France
| | - Laurent David
- Unité Mixte CNRS-BioMérieux, UMR 2714, ENS Lyon, 46 Allée d’Italie, 69364 Lyon Cedex 07, France, Institut de Biologie et Chimie des Protéines, UMR 5086 CNRS, 7 Passage du Vercors, 69967 Lyon Cedex 07, France, and Laboratoire des Matériaux Polymères et des Biomatériaux, UMR CNRS 5223 Ingénierie des Matériaux Polymères, Université de Lyon, Université Lyon 1, Domaine Scientifique de la Doua, Bât. ISTIL, 15 Bd. A. Latarjet, 69622 Villeurbanne Cedex, France
| | - Alain Domard
- Unité Mixte CNRS-BioMérieux, UMR 2714, ENS Lyon, 46 Allée d’Italie, 69364 Lyon Cedex 07, France, Institut de Biologie et Chimie des Protéines, UMR 5086 CNRS, 7 Passage du Vercors, 69967 Lyon Cedex 07, France, and Laboratoire des Matériaux Polymères et des Biomatériaux, UMR CNRS 5223 Ingénierie des Matériaux Polymères, Université de Lyon, Université Lyon 1, Domaine Scientifique de la Doua, Bât. ISTIL, 15 Bd. A. Latarjet, 69622 Villeurbanne Cedex, France
| | - Thierry Delair
- Unité Mixte CNRS-BioMérieux, UMR 2714, ENS Lyon, 46 Allée d’Italie, 69364 Lyon Cedex 07, France, Institut de Biologie et Chimie des Protéines, UMR 5086 CNRS, 7 Passage du Vercors, 69967 Lyon Cedex 07, France, and Laboratoire des Matériaux Polymères et des Biomatériaux, UMR CNRS 5223 Ingénierie des Matériaux Polymères, Université de Lyon, Université Lyon 1, Domaine Scientifique de la Doua, Bât. ISTIL, 15 Bd. A. Latarjet, 69622 Villeurbanne Cedex, France
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Oskolkov NN, Potemkin II. Complexation in Asymmetric Solutions of Oppositely Charged Polyelectrolytes: Phase Diagram. Macromolecules 2007. [DOI: 10.1021/ma0709304] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nikolay N. Oskolkov
- Physics Department, Moscow State University, Moscow 119992, Russian Federation; Department of Polymer Science, University of Ulm, Ulm 89069, Germany
| | - Igor I. Potemkin
- Physics Department, Moscow State University, Moscow 119992, Russian Federation; Department of Polymer Science, University of Ulm, Ulm 89069, Germany
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Vasilevskaya VV, Leclercq L, Boustta M, Vert M, Khokhlov AR. Study of Interpolymer Complexes of Oppositely Charged Macromolecules with Different Affinity to Solvent. Macromolecules 2007. [DOI: 10.1021/ma070749v] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- V. V. Vasilevskaya
- Nesmeyanov Institute of Organoelemental Compounds (INEOS), Russian Academy of Sciences, Vavilova ul. 28, Moscow 119991, Russia, and Max Mousseron Institute of Biomolecules, UMR CNRS 5247, Equipe CRBA, Faculté de Pharmacie, 15 avenue Charles Flahaut, BP 14491, 34093 Montpellier cedex 5, France
| | - L. Leclercq
- Nesmeyanov Institute of Organoelemental Compounds (INEOS), Russian Academy of Sciences, Vavilova ul. 28, Moscow 119991, Russia, and Max Mousseron Institute of Biomolecules, UMR CNRS 5247, Equipe CRBA, Faculté de Pharmacie, 15 avenue Charles Flahaut, BP 14491, 34093 Montpellier cedex 5, France
| | - M. Boustta
- Nesmeyanov Institute of Organoelemental Compounds (INEOS), Russian Academy of Sciences, Vavilova ul. 28, Moscow 119991, Russia, and Max Mousseron Institute of Biomolecules, UMR CNRS 5247, Equipe CRBA, Faculté de Pharmacie, 15 avenue Charles Flahaut, BP 14491, 34093 Montpellier cedex 5, France
| | - M. Vert
- Nesmeyanov Institute of Organoelemental Compounds (INEOS), Russian Academy of Sciences, Vavilova ul. 28, Moscow 119991, Russia, and Max Mousseron Institute of Biomolecules, UMR CNRS 5247, Equipe CRBA, Faculté de Pharmacie, 15 avenue Charles Flahaut, BP 14491, 34093 Montpellier cedex 5, France
| | - A. R. Khokhlov
- Nesmeyanov Institute of Organoelemental Compounds (INEOS), Russian Academy of Sciences, Vavilova ul. 28, Moscow 119991, Russia, and Max Mousseron Institute of Biomolecules, UMR CNRS 5247, Equipe CRBA, Faculté de Pharmacie, 15 avenue Charles Flahaut, BP 14491, 34093 Montpellier cedex 5, France
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Guo R, Zhang L, Jiang Z, Cao Y, Ding Y, Jiang X. Synthesis of Alginic Acid−Poly[2-(diethylamino)ethyl methacrylate] Monodispersed Nanoparticles by a Polymer−Monomer Pair Reaction System. Biomacromolecules 2007; 8:843-50. [PMID: 17291037 DOI: 10.1021/bm060906i] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In this paper, alginic acid-poly(2-(diethylamino)ethyl methacrylate) (ALG-PDEA) nanoparticles were successfully prepared in aqueous medium using a polymer-monomer pair reaction system consisting of the anionic alginic acid (ALG) and the cationic 2-(diethylamino)ethyl methacrylate (DEA), without any aid of surfactants or organic solvents. The ALG-PDEA nanoparticles were monodispersed and stable in aqueous solution. Nanoparticles with desired size could be obtained by varying the amount of initiator or changing the concentration of reactants in solution, which renders this system highly controllable. After the ALG moiety was gelled by Ca(2+), the stability of the nanoparticles in basic or high salt concentration solutions could be notably enhanced. A pH-sensitive anticancer agent, hydroxycamptothecin (HCPT), was encapsulated in ALG-PDEA nanoparticles, and preliminary in vitro release as well as cytotoxicity experiments were carried out. It is found that this system seems to be a very promising carrier for the loading and delivery of labile drugs, taking into account that the preparation procedure is simple, mild, and organic solvent- and surfactant-free. Moreover, the abundant functional groups on the particle surface, such as carboxyls and hydroxyls, allow subsequent chemical modification, which may further unleash the potential of such a system in either biomedical applications or in the construction of other functional mesoscopic architectures.
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Affiliation(s)
- Rui Guo
- Laboratory of Mesoscopic Chemistry, Department of Polymer Science and Engineering, College of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, People's Republic of China
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Izumrudov V, Paraschuk V, Sybachin A. Controlled phase separations in solutions of polyelectrolyte complexes Potential for gene delivery. J Drug Deliv Sci Technol 2006. [DOI: 10.1016/s1773-2247(06)50049-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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40
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Lacík I. Polymer Chemistry in Diabetes Treatment by Encapsulated Islets of Langerhans: Review to 2006. Aust J Chem 2006. [DOI: 10.1071/ch06197] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Polymeric materials have been successfully used in numerous medical applications because of their diverse properties. For example, development of a bioartificial pancreas remains a challenge for polymer chemistry. Polymers, as a form of various encapsulation device, have been proposed for designing the semipermeable membrane capable of long-term immunoprotection of transplanted islets of Langerhans, which regulate the blood glucose level in a diabetic patient. This review describes the current situation in the field, discussing aspects of material selection, encapsulation devices, and encapsulation protocols. Problems and unanswered questions are emphasized to illustrate why clinical therapies with encapsulated islets have not been realized, despite intense activity over the past 15 years. The review was prepared with the goal to address professionals in the field as well as the broad polymer community to help in overcoming final barriers to the clinical phase for transplantation of islets of Langerhans encapsulated in a polymeric membrane.
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