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Singhal A, Schneible JD, Lilova RL, Hall CK, Menegatti S, Grafmüller A. A multiscale coarse-grained model to predict the molecular architecture and drug transport properties of modified chitosan hydrogels. SOFT MATTER 2020; 16:10591-10610. [PMID: 33156313 DOI: 10.1039/d0sm01243b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Hydrogels constructed with functionalized polysaccharides are of interest in a multitude of applications, chiefly the design of therapeutic and regenerative formulations. Tailoring the chemical modification of polysaccharide-based hydrogels to achieve specific drug release properties involves the optimization of many tunable parameters, including (i) the type, degree (χ), and pattern of the functional groups, (ii) the water-polymer ratio, and (iii) the drug payload. To guide the design of modified polysaccharide hydrogels for drug release, we have developed a computational toolbox that predicts the structure and physicochemical properties of acylated chitosan chains, and their impact on the transport of drug molecules. Herein, we present a multiscale coarse-grained model to investigate the structure of networks of chitosan chains modified with acetyl, butanoyl, or heptanoyl moieties, as well as the diffusion of drugs doxorubicin (Dox) and gemcitabine (Gem) through the resulting networks. The model predicts the formation of different network structures, in particular the hydrophobically-driven transition from a uniform to a cluster/channel morphology and the formation of fibers of chitin chains. The model also describes the impact of structural and physicochemical properties on drug transport, which was confirmed experimentally by measuring Dox and Gem diffusion through an ensemble of modified chitosan hydrogels.
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Affiliation(s)
- Ankush Singhal
- Department of Theory and Biosystems, Max Planck Institute for Colloids and Interfaces, Potsdam 14476, Germany.
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Amani P, Miller R, Ata S, Hurter S, Rudolph V, Firouzi M. Dynamics of interfacial layers for sodium dodecylbenzene sulfonate solutions at different salinities. J IND ENG CHEM 2020. [DOI: 10.1016/j.jiec.2020.09.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Arnon-Rips H, Cohen Y, Saidi L, Porat R, Poverenov E. Covalent linkage of bioactive volatiles to a polysaccharide support as a potential approach for preparing active edible coatings and delivery systems for food products. Food Chem 2020; 338:127822. [PMID: 32810813 DOI: 10.1016/j.foodchem.2020.127822] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 08/09/2020] [Accepted: 08/10/2020] [Indexed: 11/15/2022]
Abstract
In this study, a potential of covalent linkage approach for developing active edible coatings was examined. Vanillin and trans-cinnamaldehyde were bound to chitosan by Schiff base reaction and reductive amination. The modified polysaccharides were comprehensively characterized and applied as active coatings on fresh-cut melon. The covalent linkage allowed overcoming solubility problems with the lipophilic vanillin and cinnamaldehyde and neutralizing their volatility, producing well-adhered coatings that enhanced fruit quality and storability without sensorial impairment. The attached hydrophobic moieties also provided new polysaccharides with self-assembling ability. Their aggregates were loaded with antimicrobial citral and added to mandarin juice, resulting in up to 6 log CFU/mL microbial count reduction. Thus, the covalent linkage concept offers several advantages, especially when hydrophobic or volatile active agents are used. Further developed, it may become a safe and effective tool for the formation of advanced active edible coatings and delivery vehicles for direct applications on food products.
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Affiliation(s)
- Hadar Arnon-Rips
- Agro-Nanotechnology and Advanced Materials Center, Institute of Postharvest and Food Sciences, Agricultural Research Organization, The Volcani Center, Rishon LeZion 7505101, Israel; Institute of Biochemistry, Food Science and Nutrition, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 76100, Israel.
| | - Yael Cohen
- Agro-Nanotechnology and Advanced Materials Center, Institute of Postharvest and Food Sciences, Agricultural Research Organization, The Volcani Center, Rishon LeZion 7505101, Israel; Institute of Biochemistry, Food Science and Nutrition, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 76100, Israel
| | - Lilah Saidi
- Agro-Nanotechnology and Advanced Materials Center, Institute of Postharvest and Food Sciences, Agricultural Research Organization, The Volcani Center, Rishon LeZion 7505101, Israel; Institute of Biochemistry, Food Science and Nutrition, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 76100, Israel
| | - Ron Porat
- Agro-Nanotechnology and Advanced Materials Center, Institute of Postharvest and Food Sciences, Agricultural Research Organization, The Volcani Center, Rishon LeZion 7505101, Israel.
| | - Elena Poverenov
- Agro-Nanotechnology and Advanced Materials Center, Institute of Postharvest and Food Sciences, Agricultural Research Organization, The Volcani Center, Rishon LeZion 7505101, Israel.
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Schneible JD, Singhal A, Lilova RL, Hall CK, Grafmüller A, Menegatti S. Tailoring the Chemical Modification of Chitosan Hydrogels to Fine-Tune the Release of a Synergistic Combination of Chemotherapeutics. Biomacromolecules 2019; 20:3126-3141. [PMID: 31310515 DOI: 10.1021/acs.biomac.9b00707] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Combination chemotherapy with a defined ratio and sequence of drug release is a clinically established and effective route to treat advanced solid tumors. In this context, a growing body of literature demonstrates the potential of hydrogels constructed with chemically modified polysaccharides as depots for controlled release of chemotherapeutics. Identifying the appropriate modification in terms of physicochemical properties of the functional group and its degree of substitution (χ) to achieve the desired release profile for multiple drugs is, however, a complex multivariate problem. To address this issue, we have developed a computational toolbox that models the migration of a drug pair through a hydrated network of polysaccharide chains modified with hydrophobic moieties. In this study, we chose doxorubicin (DOX) and Gemcitabine (GEM) as model drugs, as their synergistic effect against breast cancer has been thoroughly investigated, and chitosan as the model polymer. Our model describes how the modification of chitosan chains with acetyl, butanoyl, and heptanoyl moieties at different values χ governs both the structure of the hydrogel network and drug migration through it. Our experimental data confirm the in silico predictions for both single- and dual-drug release and, most notably, the counterintuitive inversion of release vs χ that occurs when switching from a single- to a dual-drug system. Consensus between predicted and experimental data indicates that acetyl modifications (χ = 32-42%) and butanoyl modifications (χ = 19-24%) provide synergistic GEM/DOX release molar ratios (i.e., 5-10). Collectively, these results demonstrate the potential of this model in guiding the design of chemotherapeutic hydrogels to combat cancer.
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Affiliation(s)
- John D Schneible
- Department of Chemical and Biomolecular Engineering , North Carolina State University , Raleigh , North Carolina 27695 , United States
| | - Ankush Singhal
- Department of Theory and Biosystems , Max Planck Institute for Colloids and Interfaces , Potsdam 14476 , Germany
| | - Radina L Lilova
- Department of Chemical and Biomolecular Engineering , North Carolina State University , Raleigh , North Carolina 27695 , United States
| | - Carol K Hall
- Department of Chemical and Biomolecular Engineering , North Carolina State University , Raleigh , North Carolina 27695 , United States
| | - Andrea Grafmüller
- Department of Theory and Biosystems , Max Planck Institute for Colloids and Interfaces , Potsdam 14476 , Germany
| | - Stefano Menegatti
- Department of Chemical and Biomolecular Engineering , North Carolina State University , Raleigh , North Carolina 27695 , United States
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Modification of Chitosan for the Generation of Functional Derivatives. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9071321] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Today, chitosan (CS) is probably considered as a biofunctional polysaccharide with the most notable growth and potential for applications in various fields. The progress in chitin chemistry and the need to replace additives and non-natural polymers with functional natural-based polymers have opened many new opportunities for CS and its derivatives. Thanks to the specific reactive groups of CS and easy chemical modifications, a wide range of physico-chemical and biological properties can be obtained from this ubiquitous polysaccharide that is composed of β-(1,4)-2-acetamido-2-deoxy-d-glucose repeating units. This review is presented to share insights into multiple native/modified CSs and chitooligosaccharides (COS) associated with their functional properties. An overview will be given on bioadhesive applications, antimicrobial activities, adsorption, and chelation in the wine industry, as well as developments in medical fields or biodegradability.
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Tian H, Lu Z, Yu H, Chen C, Hu J. Fabrication and characterization of citral-loaded oil-in-water Pickering emulsions stabilized by chitosan-tripolyphosphate particles. Food Funct 2019; 10:2595-2604. [DOI: 10.1039/c8fo02002g] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Citral-loaded oil-in-water Pickering emulsions were stabilized by CS-TPP Ps to protect citral from degradation in acidic environment.
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Affiliation(s)
- Huaixiang Tian
- School of Perfume and Aroma Technology
- Shanghai Institute of Technology
- Shanghai
- China
| | - Zhuoyan Lu
- School of Perfume and Aroma Technology
- Shanghai Institute of Technology
- Shanghai
- China
| | - Haiyan Yu
- School of Perfume and Aroma Technology
- Shanghai Institute of Technology
- Shanghai
- China
| | - Chen Chen
- School of Perfume and Aroma Technology
- Shanghai Institute of Technology
- Shanghai
- China
| | - Jing Hu
- School of Perfume and Aroma Technology
- Shanghai Institute of Technology
- Shanghai
- China
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Merzendorfer H. Chitosan Derivatives and Grafted Adjuncts with Unique Properties. BIOLOGICALLY-INSPIRED SYSTEMS 2019. [DOI: 10.1007/978-3-030-12919-4_3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Improvement of the surface wettability of silicone hydrogel films by self-assembled hydroxypropyltrimethyl ammonium chloride chitosan mixed colloids. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.08.073] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Racine L, Texier I, Auzély-Velty R. Chitosan-based hydrogels: recent design concepts to tailor properties and functions. POLYM INT 2017. [DOI: 10.1002/pi.5331] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Lisa Racine
- Grenoble Alpes University and CEA LETI MlNATEC Campus; France
- Grenoble Alpes University, CERMAV-CNRS; France
| | - Isabelle Texier
- Grenoble Alpes University and CEA LETI MlNATEC Campus; France
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Evaluation of the antibacterial activity of a cationic polymer in aqueous solution with a convenient electrochemical method. Anal Bioanal Chem 2016; 409:1627-1633. [DOI: 10.1007/s00216-016-0105-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Revised: 11/08/2016] [Accepted: 11/16/2016] [Indexed: 10/20/2022]
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Gu D, O'Connor AJ, G H Qiao G, Ladewig K. Hydrogels with smart systems for delivery of hydrophobic drugs. Expert Opin Drug Deliv 2016; 14:879-895. [PMID: 27705026 DOI: 10.1080/17425247.2017.1245290] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
INTRODUCTION Smart hydrogel systems present opportunities to not only provide hydrophobic molecule encapsulation capability but to also respond to specific delivery routes. Areas covered: An overview of the design principles, preparation methods and applications of hydrogel systems for delivery of hydrophobic drugs is given. It begins with a summary of the advantages of hydrogels as delivery vehicles over other approaches, particularly macromolecular nanocarriers, before proceeding to address the design and preparation strategies and chemistry involved, with a particular focus on the introduction of hydrophobic domains into (naturally) hydrophilic hydrogels. Finally, the applications in different delivery routes are discussed. Expert opinion: Modifications to conventional hydrogels can endow them with the capability to carry hydrophobic drugs but other functions as well, such as the improved mechanical stability, which is important for long-term in vivo residence and/or self-healing properties useful for injectable delivery pathways. These modifications harness hydrophobic-hydrophobic forces, physical interactions and inclusion complexes. The lack of in-depth understanding of these interactions, currently limits more delicate and application-oriented designs. Increased efforts are needed in (i) understanding the interplay of gel formation and simultaneous drug loading; (ii) improving hydrogel systems with respect to their biosafety; and (iii) control over release mechanism and profile.
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Affiliation(s)
- Dunyin Gu
- a Department of Chemical and Biomolecular Engineering , The University of Melbourne , Parkville , Australia
| | - Andrea J O'Connor
- a Department of Chemical and Biomolecular Engineering , The University of Melbourne , Parkville , Australia
| | - Greg G H Qiao
- a Department of Chemical and Biomolecular Engineering , The University of Melbourne , Parkville , Australia
| | - Katharina Ladewig
- a Department of Chemical and Biomolecular Engineering , The University of Melbourne , Parkville , Australia
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Pini N, Lima D, Lovadino J, Ganss C, Schlueter N. In vitro Efficacy of Experimental Chitosan-Containing Solutions as Anti-Erosive Agents in Enamel. Caries Res 2016; 50:337-45. [DOI: 10.1159/000445758] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Accepted: 03/22/2016] [Indexed: 11/19/2022] Open
Abstract
The present study evaluated the effect of chitosans with different viscosities, dissolved in an AmF/SnCl2 solution, against erosion or erosion/abrasion. A total of 192 specimens were assigned to 2 × 6 groups (n = 16 specimens each): negative control, 4 chitosan solutions (groups Ch50, Ch500, Ch1000, and Ch2000, with viscosity of 50, 500, 1,000, or 2,000 mPas, respectively, 0.5% chitosan, 500 ppm F-, 800 ppm Sn2+, pH 4.4), and positive control (500 ppm F-, 800 ppm Sn2+, pH 4.3). One half of the groups was demineralized (experiment 1, E1; 10 days, 6 × 2 min/day, 0.5% citric acid, pH 2.8) and exposed to solutions (2 × 2 min/day); the other half was additionally brushed (15 s, 200 g) with non-fluoridated toothpaste before solution immersion (experiment 2, E2). Treatment effects were investigated by profilometry, energy-dispersive X-ray spectroscopy and scanning electron microscopy (SEM). In E1, all the chitosan-containing solutions reduced enamel loss by 77-80%, to the same extent as the positive control, except for Ch2000 (p ≤ 0.05), which completely inhibited tissue loss by the formation of precipitates. In E2, Ch50 and Ch500 showed best performance, with approximately 60% reduction of tissue loss compared to the negative control group (p ≤ 0.05 compared to other groups). SEM analysis showed differences between negative control and the other groups but only minor differences amongst the groups treated with active agents. In both E1 and E2, treatment with active agents resulted in surface enrichment of carbon and tin compared to negative control (p ≤ 0.001); brushing removed parts of carbon and tin (p ≤ 0.001). Chitosan shows different properties under erosive and erosive/abrasive conditions. Under erosive conditions high viscosity might be helpful, whereas lower viscosity seems to be more effective in cases of chemo-mechanical challenges.
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Korchagina EV, Philippova OE. Ion-Specific Self-Assembly of Hydrophobically Modified Polycation of Natural Origin. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b02213] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Ruocco N, Frielinghaus H, Vitiello G, D’Errico G, Leal LG, Richter D, Ortona O, Paduano L. How hydrophobically modified chitosans are stabilized by biocompatible lipid aggregates. J Colloid Interface Sci 2015; 452:160-168. [DOI: 10.1016/j.jcis.2015.03.058] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Revised: 03/31/2015] [Accepted: 03/31/2015] [Indexed: 01/02/2023]
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N-hexylimine-chitosan, a biodegradable and covalently stabilized source of volatile, antimicrobial hexanal. Next generation controlled-release system. Food Hydrocoll 2015. [DOI: 10.1016/j.foodhyd.2015.02.033] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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Zargar V, Asghari M, Dashti A. A Review on Chitin and Chitosan Polymers: Structure, Chemistry, Solubility, Derivatives, and Applications. CHEMBIOENG REVIEWS 2015. [DOI: 10.1002/cben.201400025] [Citation(s) in RCA: 470] [Impact Index Per Article: 52.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Younes I, Rinaudo M. Chitin and chitosan preparation from marine sources. Structure, properties and applications. Mar Drugs 2015; 13:1133-74. [PMID: 25738328 PMCID: PMC4377977 DOI: 10.3390/md13031133] [Citation(s) in RCA: 1006] [Impact Index Per Article: 111.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2014] [Accepted: 02/16/2015] [Indexed: 02/07/2023] Open
Abstract
This review describes the most common methods for recovery of chitin from marine organisms. In depth, both enzymatic and chemical treatments for the step of deproteinization are compared, as well as different conditions for demineralization. The conditions of chitosan preparation are also discussed, since they significantly impact the synthesis of chitosan with varying degree of acetylation (DA) and molecular weight (MW). In addition, the main characterization techniques applied for chitin and chitosan are recalled, pointing out the role of their solubility in relation with the chemical structure (mainly the acetyl group distribution along the backbone). Biological activities are also presented, such as: antibacterial, antifungal, antitumor and antioxidant. Interestingly, the relationship between chemical structure and biological activity is demonstrated for chitosan molecules with different DA and MW and homogeneous distribution of acetyl groups for the first time. In the end, several selected pharmaceutical and biomedical applications are presented, in which chitin and chitosan are recognized as new biomaterials taking advantage of their biocompatibility and biodegradability.
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Affiliation(s)
- Islem Younes
- Laboratory of Enzyme Engineering and Microbiology, University of Sfax, National School of Engineering, PO Box 1173-3038, Sfax, Tunisia.
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Rheological and antioxidant power studies of enzymatically grafted chitosan with a hydrophobic alkyl side chain. Food Hydrocoll 2014. [DOI: 10.1016/j.foodhyd.2013.12.030] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Shilova SV, Zinurova OA, Tret’yakova AY, Barabanov VP. Polymer colloid complexes of chitosan with sodium dodecyl sulfate in water-alcohol media. RUSS J APPL CHEM+ 2014. [DOI: 10.1134/s1070427214030124] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Lopes G, de Oliveira TCDC, Pérez-Gramatges A, da Silva JFM, Nascimento RSV. Cationic and hydrophobically modified chitosans as additives for water-based drilling fluids. J Appl Polym Sci 2013. [DOI: 10.1002/app.40300] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Grazielle Lopes
- Instituto de Química, Departamento Química Orgânica; Universidade Federal do Rio de Janeiro, Cidade Universitária; Rio de Janeiro CEP 21941-590 Brazil
| | - Thacyla Campos do Carmo de Oliveira
- Instituto de Química, Departamento Química Orgânica; Universidade Federal do Rio de Janeiro, Cidade Universitária; Rio de Janeiro CEP 21941-590 Brazil
| | - Aurora Pérez-Gramatges
- Instituto de Química, Departamento Química Orgânica; Universidade Federal do Rio de Janeiro, Cidade Universitária; Rio de Janeiro CEP 21941-590 Brazil
| | - Joaquim F. M. da Silva
- Instituto de Química, Departamento Química Orgânica; Universidade Federal do Rio de Janeiro, Cidade Universitária; Rio de Janeiro CEP 21941-590 Brazil
| | - Regina Sandra V. Nascimento
- Instituto de Química, Departamento Química Orgânica; Universidade Federal do Rio de Janeiro, Cidade Universitária; Rio de Janeiro CEP 21941-590 Brazil
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Finelli I, Chiessi E, Oddo L, Galesso D, Renier D, Paradossi G. Collective Dynamics and Transient Behavior of Partially Hydrophobic Hyaluronic Acid Chains. MACROMOL CHEM PHYS 2013. [DOI: 10.1002/macp.201300503] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ivana Finelli
- Dipartimento di Scienze e Tecnologie Chimiche; Università di Roma Tor Vergata; 00133 Rome Italy
| | - Ester Chiessi
- Dipartimento di Scienze e Tecnologie Chimiche; Università di Roma Tor Vergata; 00133 Rome Italy
| | - Letizia Oddo
- Dipartimento di Scienze e Tecnologie Chimiche; Università di Roma Tor Vergata; 00133 Rome Italy
| | - Devis Galesso
- FIDIA Farmaceutici S.p.A; Via Ponte della Fabbrica 3/A, Abano Terme (PD) 35031 Italy
| | - Davide Renier
- FIDIA Farmaceutici S.p.A; Via Ponte della Fabbrica 3/A, Abano Terme (PD) 35031 Italy
| | - Gaio Paradossi
- Dipartimento di Scienze e Tecnologie Chimiche; Università di Roma Tor Vergata; 00133 Rome Italy
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Lin C, Fang F, Lin M, Jiang R. Bulk Properties of Carboxymethylchitosan and Cationic Surfactant Mixtures: Fluorescence and Surface Tension Studies. J DISPER SCI TECHNOL 2013. [DOI: 10.1080/01932691.2013.767207] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Pérez-Gramatges A, Matheus CR, Lopes G, da Silva JC, Nascimento RS. Surface and interfacial tension study of interactions between water-soluble cationic and hydrophobically modified chitosans and nonylphenol ethoxylate. Colloids Surf A Physicochem Eng Asp 2013. [DOI: 10.1016/j.colsurfa.2012.11.035] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Philippova OE, Korchagina EV. Chitosan and its hydrophobic derivatives: Preparation and aggregation in dilute aqueous solutions. POLYMER SCIENCE SERIES A 2012. [DOI: 10.1134/s0965545x12060107] [Citation(s) in RCA: 88] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Korchagina EV, Philippova OE. Effects of hydrophobic substituents and salt on core-shell aggregates of hydrophobically modified chitosan: light scattering study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:7880-7888. [PMID: 22548489 DOI: 10.1021/la3013409] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In this study we examine two methods of enhancement of aggregation of hydrophobically modified chitosan in dilute aqueous solutions: by increasing the content of n-dodecyl substituents, favoring hydrophobic association, and by increasing the amount of added low molecular weight salt, screening the electrostatic repulsion between similarly charged aggregating chains. By static and dynamic light scattering it was demonstrated that at the growth of the content of hydrophobic groups in the polymer (2-4 mol %) and of the amount of salt in solution (0.025-0.1 M) the weight fraction of aggregates increases, but the aggregation number remains unchanged. This behavior was attributed to the core-shell structure of the aggregates, which provides a low surface energy and strong attraction of associating groups inside the core. At the same time, the effects of the content of hydrophobic groups in the polymer and the ionic strength of the solution on the radii of the aggregates are quite different. Increasing the content of hydrophobic groups induces growth of the gyration radii of the aggregates, but does not affect their hydrodynamic radii. These data suggest the expansion of the hydrophobic core of the aggregates and the contraction of their highly swollen shell. On the other hand, increasing the salt concentration leads to a decrease of both the gyration and hydrodynamic radii of the aggregates, which is due to partial screening of electrostatic repulsion between similarly charged units and lowering of the osmotic pressure of counterions confined inside the aggregates.
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Palla CA, Pacheco C, Carrín ME. Preparation and modification of chitosan particles for Rhizomucor miehei lipase immobilization. Biochem Eng J 2011. [DOI: 10.1016/j.bej.2011.04.008] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Auzély-Velty R. Self-assembling polysaccharide systems based on cyclodextrin complexation: Synthesis, properties and potential applications in the biomaterials field. CR CHIM 2011. [DOI: 10.1016/j.crci.2010.04.019] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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30
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Chitosan and Chitosan Derivatives in Drug Delivery and Tissue Engineering. ADVANCES IN POLYMER SCIENCE 2011. [DOI: 10.1007/12_2011_137] [Citation(s) in RCA: 199] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Korchagina EV, Philippova OE. Multichain Aggregates in Dilute Solutions of Associating Polyelectrolyte Keeping a Constant Size at the Increase in the Chain Length of Individual Macromolecules. Biomacromolecules 2010; 11:3457-66. [DOI: 10.1021/bm100990u] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Pavlov GM, Korneeva EV, Smolina NA, Schubert US. Hydrodynamic properties of cyclodextrin molecules in dilute solutions. EUROPEAN BIOPHYSICS JOURNAL : EBJ 2010; 39:371-9. [PMID: 19159925 PMCID: PMC2812710 DOI: 10.1007/s00249-008-0394-9] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/12/2008] [Revised: 12/01/2008] [Accepted: 12/08/2008] [Indexed: 11/30/2022]
Abstract
Three well-known representatives of the cyclodextrin family were completely characterized by molecular hydrodynamics methods in three different solvents. For the first time the possibility of an estimation of velocity sedimentation coefficients s between 0.15 and 0.5 S by the numerical solution of the Lamm equation is shown. Comparison of the experimental hydrodynamic characteristics of the cyclodextrins with theoretical calculations for toroidal molecules allows an estimation of the thickness of the solvent layers on the surface of cyclodextrin molecules.
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Affiliation(s)
- Georges M Pavlov
- Laboratory of Macromolecular Chemistry and Nanoscience, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands.
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Zahedi P, De Souza R, Piquette-Miller M, Allen C. Chitosan–phospholipid blend for sustained and localized delivery of docetaxel to the peritoneal cavity. Int J Pharm 2009; 377:76-84. [DOI: 10.1016/j.ijpharm.2009.05.003] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2009] [Accepted: 05/03/2009] [Indexed: 11/28/2022]
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Mertins O, da Silveira NP, Pohlmann AR, Schröder AP, Marques CM. Electroformation of giant vesicles from an inverse phase precursor. Biophys J 2009; 96:2719-26. [PMID: 19348754 DOI: 10.1016/j.bpj.2008.12.3928] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2008] [Revised: 12/03/2008] [Accepted: 12/18/2008] [Indexed: 12/01/2022] Open
Abstract
We discuss a simple modification of the well-known method of giant vesicle electroformation that allows for a direct addition of water-soluble species to the phospholipid bilayers. Using this modified method, we prepare phospholipid vesicles decorated with chitosan, a water-soluble polysaccharide currently investigated for potential pharmacological applications. We find that the method allows this polysaccharide with primary amino groups on every glucose subunit to be tightly bound to the membrane, rather than simply being encapsulated.
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Affiliation(s)
- Omar Mertins
- Institut Charles Sadron, UPR22, Centre National de la Recherche Scientifique, Université de Strasbourg, Strasbourg, France.
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Rinaudo M, Quemeneur F, Pépin-Donat B. Stabilization of Liposomes by Polyelectrolytes: Mechanism of Interaction and Role of Experimental Conditions. ACTA ACUST UNITED AC 2009. [DOI: 10.1002/masy.200950409] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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36
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Mertins O, Lionzo MI, Micheletto YM, Pohlmann AR, Silveira NPD. Chitosan effect on the mesophase behavior of phosphatidylcholine supramolecular systems. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2009. [DOI: 10.1016/j.msec.2008.08.038] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Rinaudo M, Kil’deeva NR, Babak VG. Surfactant-polyelectrolyte complexes on the basis of chitin. RUSS J GEN CHEM+ 2008. [DOI: 10.1134/s1070363208110455] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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38
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Payet L, Terentjev EM. Emulsification and stabilization mechanisms of o/w emulsions in the presence of chitosan. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:12247-12252. [PMID: 18828612 DOI: 10.1021/la8019217] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We study emulsification of paraffin oil in aqueous solutions of chitosan without adding any other surfactant. By monitoring the surface tension of the water-paraffin interface, we show that chitosan itself has only a weak surface activity. Nevertheless, chitosan dissolved in the aqueous phase allows the dispersion of oil by increasing the matrix viscosity and provides stabilization of the oil-water interface by forming a dense polyelectrolitic brush on the water side of this interface. We characterize emulsions with varying oil content, and concentrations of chitosan, and follow their long-term stability. Finally, we show that by precipitating the chitosan the rigid elastic network is formed in the aqueous phase, making a very stable suspension.
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Affiliation(s)
- Linda Payet
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
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39
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The aggregative behavior of hydrophobically modified chitosans with high substitution degree in aqueous solution. Carbohydr Polym 2008. [DOI: 10.1016/j.carbpol.2008.01.009] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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40
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Wang J, Liu C, Chi P. One-step preparation of glycopeptide microspheres based on alpha-amino acid-N-carboxyanhydride polymerization using interfacial protocols. J Biomed Mater Res B Appl Biomater 2008; 89:45-54. [PMID: 18720416 DOI: 10.1002/jbm.b.31186] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
A type of polysaccharide-polypeptide hybrid material, chitin derivative with polypeptide side chains was prepared by the graft copolymerization of L-leucine N-carboxyanhydride triggered by water-soluble chitin (WSC). The studies on surface tension and aggregation demonstrated surface activity of WSC. Using this extraordinary property, the microspheres were synchronously obtained via interfacial polymerization. The method employed here to form the microspheres was in direct contrast to previous syntheses that used either templating method or oil-in-water emulsion. The study provided a facile approach for synthesizing microspheres with a variety of distinct polypeptide and regulated graft length, which had mimetic structure of glycoconjugation in extracellular matrix. Furthermore, the swelling capability of the microsphere in both acidic aqueous and organic solvents would give promising application in drug delivery.
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Affiliation(s)
- Jing Wang
- Key Laboratory for Ultrafine Materials of Ministry of Education, Engineering Research Center for Biomedical Materials of Ministry of Education, East China University of Science and Technology, Shanghai, People's Republic of China
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41
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Influence of molecular organization and interactions on drug release for an injectable polymer-lipid blend. Int J Pharm 2008; 360:83-90. [DOI: 10.1016/j.ijpharm.2008.04.031] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2008] [Revised: 03/30/2008] [Accepted: 04/12/2008] [Indexed: 11/19/2022]
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42
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Quemeneur F, Rinaudo M, Pépin-Donat B. Influence of polyelectrolyte chemical structure on their interaction with lipid membrane of zwitterionic liposomes. Biomacromolecules 2008; 9:2237-43. [PMID: 18590310 DOI: 10.1021/bm800400y] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In this paper we extend our previous experimental work on interaction between polyelectrolytes and liposomes. First, the adsorption of chitosan and alkylated chitosan (cationic polyelectrolytes) with different alkyl chain lengths on lipid membranes of liposomes is examined. The amount of both chitosans adsorbed remains the same even if more alkylated polysaccharide has to be added to get saturation if compared with unmodified chitosan. It is demonstrated that alkyl chains do not specifically interact with the lipid bilayer and that electrostatic interaction mechanism governs the chitosan adsorption. The difference observed between unmodified and alkylated chitosans behavior to reach the plateau can be interpreted in terms of a competition between electrostatic polyelectrolyte adsorption on lipid bilayer and hydrophobic autoassociation in solution (which depends on the alkyl chain length). Second, interaction of liposomes with hyaluronan (HA) and alkylated hyaluronan (anionic polyelectrolytes) is analyzed. The same types of results as discussed for chitosan are obtained, but in this case, autoassociation of alkylated HA only occurs in the presence of salt excess. Finally, a first positive layer of chitosan is adsorbed on the lipid membrane, followed by a second negative layer of HA at three different pHs. This kind of multilayer decoration allows the control of the net charge of the composite vesicles. A general conclusion is that whatever the pH and, consequently, the initial charge of the liposomes, chitosan adsorption gives positively charged composite systems, which upon addition of hyaluronan, give rise to negatively charged composite vesicles.
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Affiliation(s)
- Francois Quemeneur
- Laboratoire Electronique Moleculaire Organique et Hybride/UMR 5819 SPrAM, CEA-CNRS-UJF/INAC/CEA-Grenoble, 38054 Grenoble Cedex 9, France
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43
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Rinaudo M. Main properties and current applications of some polysaccharides as biomaterials. POLYM INT 2008. [DOI: 10.1002/pi.2378] [Citation(s) in RCA: 672] [Impact Index Per Article: 42.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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44
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Charlot A, Auzély-Velty R. Novel Hyaluronic Acid Based Supramolecular Assemblies Stabilized by Multivalent Specific Interactions: Rheological Behavior in Aqueous Solution. Macromolecules 2007. [DOI: 10.1021/ma071631h] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Aurélia Charlot
- Centre de Recherches sur les Macromolécules Végétales (CERMAV−CNRS), affiliated with Université Joseph Fourier and member of the Institut de Chimie Moléculaire de Grenoble, BP53, 38041 Grenoble Cedex 9, France
| | - Rachel Auzély-Velty
- Centre de Recherches sur les Macromolécules Végétales (CERMAV−CNRS), affiliated with Université Joseph Fourier and member of the Institut de Chimie Moléculaire de Grenoble, BP53, 38041 Grenoble Cedex 9, France
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45
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Moura MJ, Figueiredo MM, Gil MH. Rheological Study of Genipin Cross-Linked Chitosan Hydrogels. Biomacromolecules 2007; 8:3823-9. [DOI: 10.1021/bm700762w] [Citation(s) in RCA: 187] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- M. José Moura
- Departamento de Engenharia Química, Instituto Superior de Engenharia de Coimbra, R. Pedro Nunes, 3030-199 Coimbra, Portugal, and Departamento de Engenharia Química, Universidade de Coimbra, Pólo II, Pinhal de Marrocos, 3030-290 Coimbra, Portugal
| | - M. Margarida Figueiredo
- Departamento de Engenharia Química, Instituto Superior de Engenharia de Coimbra, R. Pedro Nunes, 3030-199 Coimbra, Portugal, and Departamento de Engenharia Química, Universidade de Coimbra, Pólo II, Pinhal de Marrocos, 3030-290 Coimbra, Portugal
| | - M. Helena Gil
- Departamento de Engenharia Química, Instituto Superior de Engenharia de Coimbra, R. Pedro Nunes, 3030-199 Coimbra, Portugal, and Departamento de Engenharia Química, Universidade de Coimbra, Pólo II, Pinhal de Marrocos, 3030-290 Coimbra, Portugal
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46
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Babak VG, Auzely R, Rinaudo M. Effect of Electrolyte Concentration on the Dynamic Surface Tension and Dilational Viscoelasticity of Adsorption Layers of Chitosan and Dodecyl Chitosan. J Phys Chem B 2007; 111:9519-29. [PMID: 17658788 DOI: 10.1021/jp0718653] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The effect of an external salt (AcONa) on the kinetics of adsorption and structure formation inside the adsorption layers (ALs) of chitosan (Ch) and dodecyl chitosan (C12Ch) as well as on the frequency dependence of the complex dilational elasticity modulus of these layers has been studied. The complex dilational elasticity modulus of adsorption layers of polymers has been measured on the drop tensiometer (Tracker, IT Concept, France) upon applying a small sinusoidal variation of the drop area with a given frequency, omega, in the range from 10(-2) to 0.63 rad/s and recording the variation of the surface pressure. It has been found that, in the absence of the salt, the dilational storage modulus, E'(omega), of ALs of both Ch and C12Ch is lower with regard to the loss modulus, E' '(omega), in the whole range of frequencies used, testifying for the liquidlike rheological behavior of these layers. With an increase of the salt concentration up to CAcONa > 0.1 M, the ALs become solidlike, as shown when E'(omega) > E' '(omega). Consequently, the characteristic frequency, omega c, corresponding to the intercept between the E'(omega) and E' '(omega) curves, gradually varies from omega c > 1 rad/s to omega c < 0.01 rad/s when the salt concentration is increased from zero to CAcONa = 1 M. Hydrophobically modified C12Ch, having long grafted alkyl chains, exhibited a higher sensitivity to the presence of salt than Ch: the former solidifies more readily and at lower salt concentrations than the latter. It has been found that the experimental E'(omega) and E' '(omega) curves exhibit two characteristic relaxation frequencies, omega 01 approximately 1 rad/s and omega 02 approximately 10(-3)-10(-2) rad/s, whose physical meaning and values were related to the structure of the ALs and to the competitive contribution of electrostatic and hydrophobic interactions between amino and nonpolar groups of Ch and C12Ch to the formation of a gel-like network inside the polymeric film at the interface.
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Affiliation(s)
- Valery G Babak
- Centre de Recherches sur les Macromolécules Végétales, CNRS, Laboratoire Associé à l'Université Joseph Fourier, BP53- 38041 Grenoble cedex 9, France.
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47
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Quemeneur F, Rammal A, Rinaudo M, Pépin-Donat B. Large and giant vesicles "decorated" with chitosan: effects of pH, salt or glucose stress, and surface adhesion. Biomacromolecules 2007; 8:2512-9. [PMID: 17658883 DOI: 10.1021/bm061227a] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This paper describes the behavior of large and giant unilamellar vesicles (LUVs and GUVs, respectively) in the presence of chitosan, a positively charged polyelectrolyte. Variation of the zeta-potential of LUVs as a function of chitosan concentration is studied for two different molecular weights (MW) after a preliminary study devoted to pH and salt effects on zeta-potential in order to discriminate among the effects of protons, salt, and chitosan concentrations. The difference observed between pH and salt effects on the one hand and chitosan on the other allows us to conclude there is a strong LUV-chitosan interaction. In presence of chitosan, the zeta-potential of LUVs becomes positive and two distinct regimes of variation are suggested and interpreted as follows: a first step consists of chitosan adsorption flat on the membrane (independent of MW) followed by a possible reorganization of the polymer of higher molecular weight on the surface, giving rise to loops. Then a comparative observation of the effect of pH and salt by optical microscopy is made on naked and chitosan-decorated GUVs. Results further confirm a membrane-chitosan interaction and are interpreted in the light of the results obtained for LUVs in terms of both electrostatic and hydrophobic interaction. A large majority of decorated vesicles remain stable down to pH = 1 while in the absence of chitosan they burst quickly at pH between 2 and 3. Osmotic pressure and net charge change due to addition of HCl results in a decrease in the diameter of the decorated vesicles, which remain spherical while forming tubes of lipids. In presence of NaCl, a higher resistance of decorated vesicles is also evidenced (they are stable for NaCl concentrations up to 10-1 M while naked vesicles burst when [NaCl] is between 10-2 and 10-3 M). At higher salt concentration, aggregation of decorated vesicles occurs, which is attributed to the screening of electrostatic repulsions between vesicles covered by the positively charged chitosan. Finally, adhesion of vesicles on a positively charged surface is investigated. In absence of chitosan, the vesicles immediately burst when they come in contact with the surface. On the contrary, suspension of chitosan-vesicles remain stable down to pH = 1.5. Under gentle flow vesicles move: they do not adhere on the substrate, probably due to the repulsion between positively adsorbed charged chitosan and substrate; spherical deflation occurs, but in this case daughter vesicles are formed instead of lipid tubes.
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Affiliation(s)
- Francois Quemeneur
- Laboratoire Electronique Moléculaire Organique et Hybride/UMR 5819 SPrAM (CEA-CNRS-UJF)/DRFMC/CEA-Grenoble, 38054 Grenoble Cedex 9, France
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48
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Li YM, Xu GY, Wu D, Sui WP. The aggregation behavior between anionic carboxymethylchitosan and cetyltrimethylammonium bromide: MesoDyn simulation and experiments. Eur Polym J 2007. [DOI: 10.1016/j.eurpolymj.2007.03.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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49
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Weng L, Chen X, Chen W. Rheological characterization of in situ crosslinkable hydrogels formulated from oxidized dextran and N-carboxyethyl chitosan. Biomacromolecules 2007; 8:1109-15. [PMID: 17358076 PMCID: PMC2572577 DOI: 10.1021/bm0610065] [Citation(s) in RCA: 171] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The gelation kinetics of an in situ gelable hydrogel formulated from oxidized dextran (Odex) and N-carboxyethyl chitosan (CEC) was investigated rheologically. Both Schiff base mediated chemical and physical crosslinking account for its rapid gelation (30-600 s) between 5 and 37 degrees C. The correlation between gelation kinetics and hydrogel properties with Odex/CEC concentration, their feed ratio, and temperature were elucidated. The gelation time determined from crossing over of storage moduli (G') and loss moduli (G' ') was in good agreement with that deduced from frequency sweeping tests according to the Winter-Chambon power law. The power law exponents for a 2% (w/v) Odex/CEC solution (ratio 5:5) at the gel point was 0.61, which is in excellent agreement with the value predicted from percolation theory (2/3). Temperature dependence of gelation time for the same hydrogel formulation is well-described by an Arrhenius plot with its apparent activation energy calculated at 51.9 kJ/mol.
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Affiliation(s)
- Lihui Weng
- Department of Biomedical Engineering, State University of New York-Stony Brook, Stony Brook, NY11794-8181
| | - Xuming Chen
- Department of Chemistry, State University of New York-Stony Brook, Stony Brook, NY11794-3400
| | - Weiliam Chen
- Department of Biomedical Engineering, State University of New York-Stony Brook, Stony Brook, NY11794-8181
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50
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Schneider A, Vodouhê C, Richert L, Francius G, Le Guen E, Schaaf P, Voegel JC, Frisch B, Picart C. Multifunctional polyelectrolyte multilayer films: combining mechanical resistance, biodegradability, and bioactivity. Biomacromolecules 2007; 8:139-45. [PMID: 17206799 PMCID: PMC2535908 DOI: 10.1021/bm060765k] [Citation(s) in RCA: 119] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Cross-linked polyelectrolyte multilayer films (CL PEM) have an increased rigidity and are mechanically more resistant than native (e.g., uncrosslinked) films. However, they are still biodegradable, which make them interesting candidates for biomedical applications. In this study, CL PEM films have been explored for their multifunctional properties as (i) mechanically resistant, (ii) biodegradable, and (iii) bioactive films. Toward this end, we investigated drug loading into CL chitosan/hyaluronan (CHI/HA) and poly(L-lysine)/hyaluronan (PLL/HA) films by simple diffusion of the drugs. Sodium diclofenac and paclitaxel were chosen as model drugs and were successfully loaded into the films. The effect of varying the number of layers in the (CHI/HA) films as well as the cross-linker concentration on diclofenac loading were studied. Diclofenac was released from the film in about 10 h. Paclitaxel was also found to diffuse within CL films. Its activity was maintained after loading in the CL films, and cellular viability could be reduced by about 55% over 3 days. Such a simple approach may be applied to other types of cross-linked films and to other drugs. These results prove that it is possible to design multifunctional multilayer films that combine mechanical resistance, biodegradability, and bioactivity properties into a single PEM architecture.
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Affiliation(s)
- Aurore Schneider
- Institut National de la Santé et de la Recherche Médicale, Unité 595, Faculté de Chirurgie Dentaire, Université Louis Pasteur, 11 rue Humann, 67085 Strasbourg Cedex, France
- Laboratoire de Chimie Enzymatique et Vectorisation LC01, UMR 7175 CNRS-Université Louis Pasteur, 74 route du Rhin, 67 400 Illkirch, France
| | - Constant Vodouhê
- Institut National de la Santé et de la Recherche Médicale, Unité 595, Faculté de Chirurgie Dentaire, Université Louis Pasteur, 11 rue Humann, 67085 Strasbourg Cedex, France
| | - Ludovic Richert
- Institut National de la Santé et de la Recherche Médicale, Unité 595, Faculté de Chirurgie Dentaire, Université Louis Pasteur, 11 rue Humann, 67085 Strasbourg Cedex, France
| | - Gregory Francius
- Institut National de la Santé et de la Recherche Médicale, Unité 595, Faculté de Chirurgie Dentaire, Université Louis Pasteur, 11 rue Humann, 67085 Strasbourg Cedex, France
| | - Erell Le Guen
- Institut National de la Santé et de la Recherche Médicale, Unité 595, Faculté de Chirurgie Dentaire, Université Louis Pasteur, 11 rue Humann, 67085 Strasbourg Cedex, France
| | - Pierre Schaaf
- Institut Charles Sadron, Centre National de la Recherche Scientifique, Université Louis Pasteur, 6 rue Boussingault, 67083 Strasbourg Cedex, France
| | - Jean-Claude Voegel
- Institut National de la Santé et de la Recherche Médicale, Unité 595, Faculté de Chirurgie Dentaire, Université Louis Pasteur, 11 rue Humann, 67085 Strasbourg Cedex, France
| | - Benoît Frisch
- Laboratoire de Chimie Enzymatique et Vectorisation LC01, UMR 7175 CNRS-Université Louis Pasteur, 74 route du Rhin, 67 400 Illkirch, France
| | - Catherine Picart
- Institut National de la Santé et de la Recherche Médicale, Unité 595, Faculté de Chirurgie Dentaire, Université Louis Pasteur, 11 rue Humann, 67085 Strasbourg Cedex, France
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