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Román-Aguirre M, Leyva-Porras C, Cruz-Alcantar P, Aguilar-Elguézabal A, Saavedra-Leos MZ. Comparison of Polysaccharides as Coatings for Quercetin-Loaded Liposomes (QLL) and Their Effect as Antioxidants on Radical Scavenging Activity. Polymers (Basel) 2020; 12:polym12122793. [PMID: 33255914 PMCID: PMC7760579 DOI: 10.3390/polym12122793] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 11/19/2020] [Accepted: 11/23/2020] [Indexed: 12/18/2022] Open
Abstract
Liposomes are microstructures containing lipid and aqueous phases employed in the encapsulation and delivery of bioactive agents. Quercetin-loaded liposomes (QLLs) were coated with three different polysaccharides and then tested as radical scavengers. Lactose (LCQLL), chitosan (CCQLL), and inulin (ICQLL) were employed as coating materials. Particle size determined by light scattering, showed primary size of 200 nm for all samples, while a secondary particle size of 600 nm was observed for CCQLL. Scanning electron microscopy (SEM) evidenced particle aggregation with the addition of the polysaccharide coating. Transmission electron microscopy (TEM) revealed the layered microstructure of liposomes composed of at least two layers, and primary particle size below 100 nm. QLL showed higher antioxidant activity than the coated liposomes. This behavior was attributed to the chemical interaction between quercetin and the corresponding coating polysaccharide in the layered structure, which traps the quercetin and keeps it unavailable for radical scavenging. From the three polysaccharides, lactose showed a better performance as coating material in the antioxidant activity, which suggested that the smaller size of the disaccharide molecule resulted in a faster releasing of the quercetin in the solution. Thus, LCQLL is an advantageous way to deliver quercetin for antioxidant purposes, where the low stability in delivered media of quercetin loaded liposomes is commonly compromised.
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Affiliation(s)
- Manuel Román-Aguirre
- Doctorado Institucional en Ingeniería y Ciencia de los Materiales, Universidad Autónoma de San Luis Potosí, San Luis Potosí 78210, Mexico;
| | - César Leyva-Porras
- Laboratorio Nacional de Nanotecnología (NanoTech), Centro de Investigación en Materiales Avanzados S.C. (CIMAV), Chihuahua 31136, Mexico;
| | - Pedro Cruz-Alcantar
- Coordinación Académica Región Altiplano (COARA), Universidad Autónoma de San Luis Potosí, Matehuala 78700, Mexico;
| | - Alfredo Aguilar-Elguézabal
- Departamento de Ingeniería y Química de Materiales, Centro de Investigación en Materiales Avanzados, S.C. (CIMAV), Chihuahua 31136, Mexico;
| | - María Zenaida Saavedra-Leos
- Coordinación Académica Región Altiplano (COARA), Universidad Autónoma de San Luis Potosí, Matehuala 78700, Mexico;
- Correspondence: ; Tel.: +52-(488)-1250150
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Kari OK, Tavakoli S, Parkkila P, Baan S, Savolainen R, Ruoslahti T, Johansson NG, Ndika J, Alenius H, Viitala T, Urtti A, Lajunen T. Light-Activated Liposomes Coated with Hyaluronic Acid as a Potential Drug Delivery System. Pharmaceutics 2020; 12:E763. [PMID: 32806740 PMCID: PMC7465487 DOI: 10.3390/pharmaceutics12080763] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 08/05/2020] [Accepted: 08/09/2020] [Indexed: 01/22/2023] Open
Abstract
Light-activated liposomes permit site and time-specific drug delivery to ocular and systemic targets. We combined a light activation technology based on indocyanine green with a hyaluronic acid (HA) coating by synthesizing HA-lipid conjugates. HA is an endogenous vitreal polysaccharide and a potential targeting moiety to cluster of differentiation 44 (CD44)-expressing cells. Light-activated drug release from 100 nm HA-coated liposomes was functional in buffer, plasma, and vitreous samples. The HA-coating improved stability in plasma compared to polyethylene glycol (PEG)-coated liposomes. Liposomal protein coronas on HA- and PEG-coated liposomes after dynamic exposure to undiluted human plasma and porcine vitreous samples were hydrophilic and negatively charged, thicker in plasma (~5 nm hard, ~10 nm soft coronas) than in vitreous (~2 nm hard, ~3 nm soft coronas) samples. Their compositions were dependent on liposome formulation and surface charge in plasma but not in vitreous samples. Compared to the PEG coating, the HA-coated liposomes bound more proteins in vitreous samples and enriched proteins related to collagen interactions, possibly explaining their slightly reduced vitreal mobility. The properties of the most abundant proteins did not correlate with liposome size or charge, but included proteins with surfactant and immune system functions in plasma and vitreous samples. The HA-coated light-activated liposomes are a functional and promising alternative for intravenous and ocular drug delivery.
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Affiliation(s)
- Otto K. Kari
- Drug Research Program, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5 E, FI-00790 Helsinki, Finland; (O.K.K.); (S.T.); (P.P.); (S.B.); (R.S.); (T.R.); (T.V.); (A.U.)
| | - Shirin Tavakoli
- Drug Research Program, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5 E, FI-00790 Helsinki, Finland; (O.K.K.); (S.T.); (P.P.); (S.B.); (R.S.); (T.R.); (T.V.); (A.U.)
| | - Petteri Parkkila
- Drug Research Program, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5 E, FI-00790 Helsinki, Finland; (O.K.K.); (S.T.); (P.P.); (S.B.); (R.S.); (T.R.); (T.V.); (A.U.)
| | - Simone Baan
- Drug Research Program, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5 E, FI-00790 Helsinki, Finland; (O.K.K.); (S.T.); (P.P.); (S.B.); (R.S.); (T.R.); (T.V.); (A.U.)
- Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, P.O. Box 80.082, 3508 TB Utrecht, The Netherlands
| | - Roosa Savolainen
- Drug Research Program, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5 E, FI-00790 Helsinki, Finland; (O.K.K.); (S.T.); (P.P.); (S.B.); (R.S.); (T.R.); (T.V.); (A.U.)
| | - Teemu Ruoslahti
- Drug Research Program, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5 E, FI-00790 Helsinki, Finland; (O.K.K.); (S.T.); (P.P.); (S.B.); (R.S.); (T.R.); (T.V.); (A.U.)
| | - Niklas G. Johansson
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5 E, FI-00790 Helsinki, Finland;
| | - Joseph Ndika
- Human Microbiome Research, Faculty of Medicine, University of Helsinki, Haartmaninkatu 3, FI-00290 Helsinki, Finland; (J.N.); (H.A.)
| | - Harri Alenius
- Human Microbiome Research, Faculty of Medicine, University of Helsinki, Haartmaninkatu 3, FI-00290 Helsinki, Finland; (J.N.); (H.A.)
- Institute of Environmental Medicine, Karolinska Institutet, 171 77 Stockholm, Sweden
| | - Tapani Viitala
- Drug Research Program, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5 E, FI-00790 Helsinki, Finland; (O.K.K.); (S.T.); (P.P.); (S.B.); (R.S.); (T.R.); (T.V.); (A.U.)
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5 E, FI-00790 Helsinki, Finland;
| | - Arto Urtti
- Drug Research Program, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5 E, FI-00790 Helsinki, Finland; (O.K.K.); (S.T.); (P.P.); (S.B.); (R.S.); (T.R.); (T.V.); (A.U.)
- School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, Yliopistonranta 1, 70210 Kuopio, Finland
- Institute of Chemistry, St. Petersburg State University, Petergof, Universitetskii pr. 26, 198504 St. Petersburg, Russia
| | - Tatu Lajunen
- Drug Research Program, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5 E, FI-00790 Helsinki, Finland; (O.K.K.); (S.T.); (P.P.); (S.B.); (R.S.); (T.R.); (T.V.); (A.U.)
- Laboratory of Pharmaceutical Technology, Department of Pharmaceutical Science, Tokyo University of Pharmacy & Life Sciences, 1432-1 Hachioji, Tokyo 192-0392, Japan
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Patere SN, Pathak PO, Kumar Shukla A, Singh RK, Kumar Dubey V, Mehta MJ, Patil AG, Gota V, Nagarsenker MS. Surface-Modified Liposomal Formulation of Amphotericin B: In vitro Evaluation of Potential Against Visceral Leishmaniasis. AAPS PharmSciTech 2017; 18:710-720. [PMID: 27222025 DOI: 10.1208/s12249-016-0553-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 05/12/2016] [Indexed: 11/30/2022] Open
Abstract
Surface modification of liposomes with targeting ligands is known to improve the efficacy with reduced untoward effects in treating infective diseases like visceral leishmaniasis (VL). In the present study, modified ligand (ML), designed by modifying polysaccharide with a long chain lipid was incorporated in liposomes with the objective to target amphotericin B (Amp B) to reticuloendothelial system and macrophages. Conventional liposomes (CL) and surface modified liposomes (SML) were characterized for size, shape, and entrapment efficiency (E.E.). Amp B SML with 3% w/w of ML retained the vesicular nature with particle size of ∼205 nm, E.E. of ∼95% and good stability. SML showed increased cellular uptake in RAW 264.7 cells which could be attributed to receptor-mediated endocytosis. Compared to Amp B solution, Amp B liposomes exhibited tenfold increased safety in vitro in RAW 264.7 and J774A.1 cell lines. Pharmacokinetics and biodistribution studies revealed high t 1/2, area under the curve (AUC)0-24, reduced clearance and prolonged retention in liver and spleen with Amp B SML compared to other formulations. In promastigote and amastigote models, Amp B SML showed enhanced performance with low 50% inhibitory concentration (IC50) compared to Amp B solution and Amp B CL. Thus, due to the targeting ability of ML, SML has the potential to achieve enhanced efficacy in treating VL.
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Magarkar A, Róg T, Bunker A. A computational study suggests that replacing PEG with PMOZ may increase exposure of hydrophobic targeting moiety. Eur J Pharm Sci 2017; 103:128-135. [PMID: 28285174 DOI: 10.1016/j.ejps.2017.03.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Revised: 02/28/2017] [Accepted: 03/07/2017] [Indexed: 12/18/2022]
Abstract
In a previous study we showed that the cause of failure of a new, proposed, targeting ligand, the AETP moiety, when attached to a PEGylated liposome, was occlusion by the poly(ethylene glycol) (PEG) layer due to its hydrophobic nature, given that PEG is not entirely hydrophilic. At the time we proposed that possible replacement with a more hydrophilic protective polymer could alleviate this problem. In this study we have used computational molecular dynamics modelling, using a model with all atom resolution, to suggest that a specific alternative protective polymer, poly(2-methyloxazoline) (PMOZ), would perform exactly this function. Our results show that when PEG is replaced by PMOZ the relative exposure to the solvent of AETP is increased to a level even greater than that we found in previous simulations for the RGD peptide, a targeting moiety that has previously been used successfully in PEGylated liposome based therapies. While the AETP moiety itself is no longer under consideration, the results of this computational study have broader significance: the use of PMOZ as an alternative polymer coating to PEG could be efficacious in the context of more hydrophobic targeting ligands. In addition to PMOZ we studied another polyoxazoline, poly(2-ethyloxazoline) (PEOZ), that has also been mooted as a possible alternate protective polymer. It was also found that the RDG peptide occlusion was significantly greater for the case of both oxazolines as opposed to PEG and that, unlike PEG, neither oxazoline entered the membrane. As far as we are aware this is the first time that polyoxazolines have been studied using molecular dynamics simulation with all atom resolution.
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Affiliation(s)
- Aniket Magarkar
- Drug Research Program, Faculty of Pharmacy, University of Helsinki, Helsinki, Finland; Institute of Organic Chemistry and Biochemistry, Academy of the Sciences of the Czech Republic Prague, Czech Republic
| | - Tomasz Róg
- Department of Physics, University of Helsinki, Helsinki, Finland
| | - Alex Bunker
- Drug Research Program, Faculty of Pharmacy, University of Helsinki, Helsinki, Finland.
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5
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Bunker A, Magarkar A, Viitala T. Rational design of liposomal drug delivery systems, a review: Combined experimental and computational studies of lipid membranes, liposomes and their PEGylation. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2016; 1858:2334-2352. [DOI: 10.1016/j.bbamem.2016.02.025] [Citation(s) in RCA: 103] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 02/09/2016] [Accepted: 02/10/2016] [Indexed: 01/22/2023]
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6
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Kang EC, Miyahara T, Akiyoshi K, Sunamoto J. Partitioning of Ganglioside-Reconstituted Liposomes in Aqueous Two-Phase Systems. J BIOACT COMPAT POL 2016. [DOI: 10.1106/088391102024230] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
The partitioning of ganglioside (GM3,GD1a, GD1b or GT1b)-reconstituted liposomes was investigated in an aqueous poly(ethylene oxide)/dextran two-phase system to evaluate the carbohydrate–carbohydrate interactions in water. The partitioning of the ganglioside-reconstituted liposome was strongly affected by the buffer employed. As the concentration of sodium phosphate decreased, the ganglioside-reconstituted liposomes were partitioned to the bottom, dextran-rich, phase. In 10 mM sodium phosphate containing 150 mM sodium chloride, the conventional liposome without ganglioside were located mostly at the interface between the two phases. On the other hand, the ganglioside-reconstituted liposomes were significantly partitioned to the bottom dextran-rich phase, which was related to the ganglioside density on the liposomal surface. This partitioningto the dextran-rich phase also depended on the chemical structure of the ganglioside on the liposomal surface. The affinity of liposomal ganglioside being on the liposomal surface to dextran was the following sequence; GT1b>GD1a>GD1b>GM3. Partitioning of liposomes to the top poly(ethylene oxide)-rich phase was negligible irrespective of the characteristics of the liposomal surface.
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Affiliation(s)
| | | | - Kazunari Akiyoshi
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Sakyo-ku, Yoshida Hommachi, Kyoto 606-8501, Japan
| | - Junzo Sunamoto
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Sakyo-ku, Yoshida Hommachi, Kyoto 606-8501, Japan
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7
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Taniguchi I, Akiyoshi K, Sunamoto J, Suda Y, Yamamoto M. Cell Specificity of Macromolecular Assembly of Cholesteryl and Galactoside Groups-Conjugated Pullulan. J BIOACT COMPAT POL 2016. [DOI: 10.1177/088391159901400301] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Galactose or lactose groups were conjugated to cholesterol-bearing pullulan (CHP). The CHP derivatives obtained formed monodisperse nanoparticles upon self-aggregation in water. Nanoparticles of galactoside-conjugated CHP self-aggregates were specifically internalized by rat hepatocytes and HepG2 cells. Galactoside-bearing CHP-coated liposome or oil droplet of O/W-emulsion was also taken up by HepG2 cells. Tissue distribution of the nanoparticle CHP self-aggregates changed dramatically with chemical conjugation of the galactose moiety. Galactoside-bearing nanoparticles were specifically accumulated in the liver.
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Affiliation(s)
- Ikuo Taniguchi
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Sakyo-ku, Yoshida-Hommachi, Kyoto 606-8501, Japan
| | - Kazunari Akiyoshi
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Sakyo-ku, Yoshida-Hommachi, Kyoto 606-8501, Japan
| | - Junzo Sunamoto
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Sakyo-ku, Yoshida-Hommachi, Kyoto 606-8501, Japan
| | - Yasuo Suda
- Department of Chemistry, Faculty of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Masayuki Yamamoto
- 2nd Department of Surgery, Nagasaki University School of Medicine, 1-7-1 Sakamoto, Nagasaki 852-8102, Japan
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8
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Nag OK, Awasthi V. Surface engineering of liposomes for stealth behavior. Pharmaceutics 2013; 5:542-69. [PMID: 24300562 PMCID: PMC3873679 DOI: 10.3390/pharmaceutics5040542] [Citation(s) in RCA: 193] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Revised: 10/10/2013] [Accepted: 10/14/2013] [Indexed: 02/08/2023] Open
Abstract
Liposomes are used as a delivery vehicle for drug molecules and imaging agents. The major impetus in their biomedical applications comes from the ability to prolong their circulation half-life after administration. Conventional liposomes are easily recognized by the mononuclear phagocyte system and are rapidly cleared from the blood stream. Modification of the liposomal surface with hydrophilic polymers delays the elimination process by endowing them with stealth properties. In recent times, the development of various materials for surface engineering of liposomes and other nanomaterials has made remarkable progress. Poly(ethylene glycol)-linked phospholipids (PEG-PLs) are the best representatives of such materials. Although PEG-PLs have served the formulation scientists amazingly well, closer scrutiny has uncovered a few shortcomings, especially pertaining to immunogenicity and pharmaceutical characteristics (drug loading, targeting, etc.) of PEG. On the other hand, researchers have also begun questioning the biological behavior of the phospholipid portion in PEG-PLs. Consequently, stealth lipopolymers consisting of non-phospholipids and PEG-alternatives are being developed. These novel lipopolymers offer the potential advantages of structural versatility, reduced complement activation, greater stability, flexible handling and storage procedures and low cost. In this article, we review the materials available as alternatives to PEG and PEG-lipopolymers for effective surface modification of liposomes.
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Affiliation(s)
- Okhil K Nag
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Oklahoma Health Sciences Center, 1110 North Stonewall Avenue, Oklahoma City, OK 73117, USA.
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Narayanan D, Gopikrishna J, Nair SV, Menon D. Proteins and Carbohydrates as Polymeric Nanodrug Delivery Systems: Formulation, Properties, and Toxicological Evaluation. MULTIFACETED DEVELOPMENT AND APPLICATION OF BIOPOLYMERS FOR BIOLOGY, BIOMEDICINE AND NANOTECHNOLOGY 2013. [DOI: 10.1007/12_2012_199] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
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Sekine Y, Moritani Y, Ikeda-Fukazawa T, Sasaki Y, Akiyoshi K. A hybrid hydrogel biomaterial by nanogel engineering: bottom-up design with nanogel and liposome building blocks to develop a multidrug delivery system. Adv Healthc Mater 2012. [PMID: 23184823 DOI: 10.1002/adhm.201200175] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
New hybrid poly(ethylene glycol) (PEG) hydrogels crosslinked with both nanogels and nanogel-coated liposome complexes are obtained by Michael addition of the acryloyl group of a cholesterol-bearing pullulan (CHP) nanogel to the thiol group of pentaerythritol tetra(mercaptoethyl) polyoxyethylene. The nanogel-coated liposome complex is stably retained after gelation and the complexes are well dispersed in the hybrid gel. Microrheological measurements show that the strength and gelation time of the hybrid hydrogel can be controlled by changing the liposome:nanogel ratio. The hydrogel is gradually degraded by hydrolysis under physiological conditions. In this process, the nanogel is released first, followed by the nanogel-coated liposomes. Hybrid hydrogels that can incorporate various molecules into the nanogel and liposomes, and release them in a two-step controllable manner, represent a new functional scaffold capable of delivering multiple drugs, proteins or DNA.
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Affiliation(s)
- Yurina Sekine
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Tokyo, Japan
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11
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Nguyen S, Alund SJ, Hiorth M, Kjøniksen AL, Smistad G. Studies on pectin coating of liposomes for drug delivery. Colloids Surf B Biointerfaces 2011; 88:664-73. [PMID: 21862293 DOI: 10.1016/j.colsurfb.2011.07.058] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2011] [Revised: 07/27/2011] [Accepted: 07/29/2011] [Indexed: 11/17/2022]
Abstract
The present study investigated the surface coating of charged liposomes by three different types of pectin (LM, HM and amidated pectin) by particle size determinations and zeta potential measurements. The pectins and the pectin coated liposomes were visualized by atomic force microscopy. The adsorption of pectin onto positive liposomes yielded a reproducible increase in particle size and a shift of the zeta potential from positive to negative side for all three pectin types, whereas the adsorption of pectin onto negative liposomes did not render any significant changes probably due to electrostatic repulsion. The positive liposomes coated with HM-pectin gave the largest pectin coated particles with the least negative zeta potential, while the opposite was observed for the LM-pectin coated positive liposomes. Furthermore, results from dynamic light scattering revealed narrow size distributions, indicating that the degree of aggregation was low for the pectin coated liposomes. As liposomes are able to encapsulate drugs and pectin has been found to be mucoadhesive, these pectin coated liposomes may be potential drug delivery systems.
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Affiliation(s)
- Sanko Nguyen
- Department of Pharmacy, School of Pharmacy, University of Oslo, Oslo, Norway.
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12
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Wang Y, Tu S, Li R, Yang X, Liu L, Zhang Q. Cholesterol succinyl chitosan anchored liposomes: preparation, characterization, physical stability, and drug release behavior. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2010; 6:471-7. [DOI: 10.1016/j.nano.2009.09.005] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2009] [Revised: 09/15/2009] [Accepted: 09/16/2009] [Indexed: 11/25/2022]
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Sugawara A, Yamane S, Akiyoshi K. Nanogel-Templated Mineralization: Polymer-Calcium Phosphate Hybrid Nanomaterials. Macromol Rapid Commun 2006. [DOI: 10.1002/marc.200500778] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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14
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Gradwell SE, Renneckar S, Esker AR, Heinze T, Gatenholm P, Vaca-Garcia C, Glasser W. Surface modification of cellulose fibers: towards wood composites by biomimetics. C R Biol 2004; 327:945-53. [PMID: 15587086 DOI: 10.1016/j.crvi.2004.07.015] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A biomimetic approach was taken for studying the adsorption of a model copolymer (pullulan abietate, DS 0.027), representing the lignin-carbohydrate complex, to a model surface for cellulose fibers (Langmuir-Blodgett thin films of regenerated cellulose). Adsorption results were assayed using surface plasmon resonance spectroscopy (SPR) and atomic force microscopy (AFM). Rapid, spontaneous, and desorption-resistant surface modification resulted. This effort is viewed as a critical first step towards the permanent surface modification of cellulose fibers with a layer of molecules amenable to either enzymatic crosslinking for improved wood composites or thermoplastic consolidation.
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Affiliation(s)
- Sheila E Gradwell
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, USA.
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15
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Grabielle-Madelmont C, Lesieur S, Ollivon M. Characterization of loaded liposomes by size exclusion chromatography. JOURNAL OF BIOCHEMICAL AND BIOPHYSICAL METHODS 2003; 56:189-217. [PMID: 12834977 DOI: 10.1016/s0165-022x(03)00059-9] [Citation(s) in RCA: 92] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This review focuses on the use of conventional (SEC) and high performance (HPSEC) size exclusion chromatography for the analysis of liposomes. The suitability of both techniques is examined regarding the field of liposome applications. The potentiality of conventional SEC is strongly improved by using a HPLC system associated to gel columns with a size selectivity range allowing liposome characterization in addition to particle fractionation. Practical aspects of size exclusion chromatography are described and a methodology based on HPSEC coupled to multidetection modes for on-line analysis of liposomes via label or substance encapsulation is presented. Examples of conventional SEC and HPSEC applications are described which concern polydispersity, size and encapsulation stability, bilayer permeabilization, liposome formation and reconstitution, incorporation of amphiphilic molecules. Size exclusion chromatography is a simple and powerful technique for investigation of encapsulation, insertion/interaction of substances from small solutes (ions, surfactants, drugs, etc.) up to large molecules (proteins, peptides and nucleic acids) in liposomes.
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Affiliation(s)
- Cécile Grabielle-Madelmont
- Equipe Physico-chimie des Systèmes Polyphasés, UMR CNRS 8612, Université Paris-Sud, Châtenay-Malabry Cedex 92296, France.
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Sivakumar P, Panduranga Rao K. The use of cholesteryl pullulan for the preparation of stable vincristine liposomes. Carbohydr Polym 2003. [DOI: 10.1016/s0144-8617(02)00187-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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17
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Cansell M, Moussaoui N, Lefrançois C. STABILITY OF MARINE LIPID BASED-LIPOSOMES UNDER ACID CONDITIONS. INFLUENCE OF XANTHAN GUM. J Liposome Res 2001; 11:229-42. [DOI: 10.1081/lpr-100108464] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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18
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Gutiérrez de Rubalcava C, Rodriguez JL, Duro R, Alvarez-Lorenzo C, Concheiro A, Seijo B. Interactions between liposomes and hydroxypropylmethylcellulose. Int J Pharm 2000; 203:99-108. [PMID: 10967432 DOI: 10.1016/s0378-5173(00)00433-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The characteristics of the adsorption process of hydroxypropylmethylcellulose (HPMC) of molecular weight 35400 Da and nominal viscosity 100 cps onto liposomes prepared with different egg lecithin-cholesterol molar ratios were examined. Adsorption isotherms were constructed and analysed to investigate the mechanisms implicated in the incorporation of the polymer to the interface. Only the isotherms obtained with cholesterol-free liposomes were fitted with Langmuir model. When cholesterol is present in the composition they present a sigmoidal slope. The mechanism of adsorption depends on liposome composition being the main force that drives polymer adsorption of hydrophobic nature. The apparent volumes of HPMC indicate that the conformation of the adsorbed macromolecules depends on liposome composition. Hydration enthalpy values show that adsorbed polymers do not give more hydrophilic systems after freeze-drying as expected with the hydrophilic characteristics of the HPMC.
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Affiliation(s)
- C Gutiérrez de Rubalcava
- Departamento de Farmacia y Tecnología Farmacéutica, Facultad de Farmacia, Universidad de Santiago de Compostela, Campus Universitario Sur, 15706, Santiago de Compostela, Spain
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19
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Letourneur D, Parisel C, Prigent-Richard S, Cansell M. Interactions of functionalized dextran-coated liposomes with vascular smooth muscle cells. J Control Release 2000; 65:83-91. [PMID: 10699273 DOI: 10.1016/s0168-3659(99)00240-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Synthetic polymers are commonly used in the medical field as implants, polymeric drugs, or drug delivery systems. Among them, bioactive sulfated polysaccharides such as chemically modified dextrans are described to exhibit various properties including the inhibition of smooth muscle cell (SMC) growth. SMCs are key cellular components involved in the physiopathology of the vascular walls especially in atherosclerosis or after vascular surgeries. Interestingly, binding sites on vascular SMCs were already observed for an antiproliferative functionalized dextran (FDx). In this context, we hypothesized that this bioactive polymer could be used as a targeting moiety on the surface of drug delivery systems. In this work, liposomes constituted of phosphatidylcholine, phosphatidylethanolamine and cholesterol (70/10/20 mol.%) were prepared and coated with FDx hydrophobized by a cholesterol anchor (CholFDx) which penetrates the lipid bilayer during the liposome formation. The liposome interactions with SMCs were then followed using radiolabeled liposomes and fluorolabeled liposomes. Results of radioactivity on SMCs indicated higher interactions with CholFDx-coated liposomes as compared to uncoated liposomes. The fluorescence of cells incubated with fluorolabeled CholFDx-coated liposomes also evidenced the liposome binding on SMC membranes. These data demonstrated that liposomes coated with FDx interacted with vascular SMCs. Consequently, the coating with such bioactive polymers appears promising for the design of new drug delivery systems for the targeting of vascular cells.
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Affiliation(s)
- D Letourneur
- LRM, CNRS UMR 7540, Institut Galilée, University Paris 13, Av. J.B. Clément, 93 430, Villetaneuse, France.
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20
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Lundahl P, Zeng CM, Lagerquist Hägglund C, Gottschalk I, Greijer E. Chromatographic approaches to liposomes, proteoliposomes and biomembrane vesicles. JOURNAL OF CHROMATOGRAPHY. B, BIOMEDICAL SCIENCES AND APPLICATIONS 1999; 722:103-20. [PMID: 10068136 DOI: 10.1016/s0378-4347(98)00370-3] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Size-exclusion chromatography has been used for fractionation of liposomes, proteoliposomes and biomembrane vesicles of up to approximately 500 nm in size and for separation of these entities from smaller components. Liposome sizes, encapsulation stability, and solute affinities for membrane proteins have been determined. Counter-current distribution in aqueous two-phase systems has widened the range of applications to larger structures. Immobilized biomembrane vesicles and (proteo)liposomes provide stationary phases for chromatographic analysis of specific or nonspecific membrane-solute interactions.
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Affiliation(s)
- P Lundahl
- Department of Biochemistry, Biomedical Center, Uppsala University, Sweden
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21
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Ueda T, Lee SJ, Nakatani Y, Ourisson G, Sunamoto J. Coating of POPC Giant Liposomes with Hydrophobized Polysaccharide. CHEM LETT 1998. [DOI: 10.1246/cl.1998.417] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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