51
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Tyukova IS, Safronov AP, Vinogradova AS, Belousova SA. Swelling of ferrogels of poly(acrylic acid) with ferric oxide nanoparticles stabilized by chitosan. POLYMER SCIENCE SERIES A 2017. [DOI: 10.1134/s0965545x17050169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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52
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Shilova SV, Tret’yakova AY, Barabanov VP. Association of chitosan in the presence of an anionic surfactant in aqueous-glycerol solutions. RUSS J APPL CHEM+ 2017. [DOI: 10.1134/s1070427217080298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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53
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Vanifatova NG, Rudnev AV, Gabrielyan GA, Dzhenloda RK, Burmistrov AA, Lazareva EV, Dzherayan TG. Application of pressure in capillary zone electrophoresis to study the aggregation of chitosan 2-hydroxybutoxypropylcarbamate. JOURNAL OF ANALYTICAL CHEMISTRY 2017. [DOI: 10.1134/s1061934817070140] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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54
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Roy JC, Salaün F, Giraud S, Ferri A, Guan J. Surface behavior and bulk properties of aqueous chitosan and type-B gelatin solutions for effective emulsion formulation. Carbohydr Polym 2017; 173:202-214. [PMID: 28732859 DOI: 10.1016/j.carbpol.2017.06.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Revised: 05/26/2017] [Accepted: 06/01/2017] [Indexed: 11/16/2022]
Abstract
The behavior of aqueous chitosan (CH), type-B gelatin (GB) and CH-GB coacervate was studied on oil-in-water emulsion formulation at various pH and concentration ratio. The coacervate was formed by phase separation at ratios CH:GB, 1:10 to 1:1 with total biopolymer concentrations of 0.55%-1.0% (w/v) at pH 4.0-5.5. Soluble complexes were formed below pH 5.0 and coacervate formation was confirmed at pH 5.0 and above by zeta potential and UV-spectroscopy measurements. The coacervate formation was found maximum at the CH-GB ratios of 1:10 and 1:5 at pH 5.5. Formulated emulsions (>10μm droplets) using 1% (w/v) chitosan and GB were found stable (+52.5mv and creaming index 86%) and unstable respectively. Emulsion stabilized by mixed CH:GB 1:5 (3%w/v) had no creaming effect. The instability was attributed to the lower surface activity (K=5.0Lg-1) of pure GB compared to CH (K=14.3Lg-1). The formulation and methods can successfully tune the stability of the emulsions.
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Affiliation(s)
- Jagadish Chandra Roy
- University Lille Nord de France, F-5900 Lille, France; ENSAIT, GMTEX, F-59100, Roubaix, France; Department of Applied Science and Technology, Politecnico di Torino, Italy; College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu, 215123, China.
| | - Fabien Salaün
- University Lille Nord de France, F-5900 Lille, France; ENSAIT, GMTEX, F-59100, Roubaix, France
| | - Stéphane Giraud
- University Lille Nord de France, F-5900 Lille, France; ENSAIT, GMTEX, F-59100, Roubaix, France
| | - Ada Ferri
- Department of Applied Science and Technology, Politecnico di Torino, Italy
| | - Jinping Guan
- College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu, 215123, China
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55
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El-Marakby EM, Hathout RM, Taha I, Mansour S, Mortada ND. A novel serum-stable liver targeted cytotoxic system using valerate-conjugated chitosan nanoparticles surface decorated with glycyrrhizin. Int J Pharm 2017; 525:123-138. [DOI: 10.1016/j.ijpharm.2017.03.081] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Revised: 03/25/2017] [Accepted: 03/28/2017] [Indexed: 12/28/2022]
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56
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Villa-Rojas R, Valdez-Fragoso A, Mújica-Paz H. Manufacturing Methods and Engineering Properties of Pectin-Based Nanobiocomposite Films. FOOD ENGINEERING REVIEWS 2017. [DOI: 10.1007/s12393-017-9163-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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57
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Gohi BFCA, Zeng HY, Pan AD, Han J, Yuan J. pH Dependence of Chitosan Enzymolysis. Polymers (Basel) 2017; 9:E174. [PMID: 30970852 PMCID: PMC6432485 DOI: 10.3390/polym9050174] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Revised: 05/05/2017] [Accepted: 05/11/2017] [Indexed: 12/22/2022] Open
Abstract
As a means of making chitosan more useful in biotechnological applications, it was hydrolyzed using pepsin, chitosanase and α-amylase. The enzymolysis behavior of these enzymes was further systematically studied for its effectiveness in the production of low-molecular-weight chitosans (LMWCs) and other derivatives. The study showed that these enzymes depend on ion hydronium (H3O+), thus on pH with a pH dependence fitting R2 value of 0.99. In y = 1.484[H^+] + 0.114, the equation of pH dependence, when [H^+] increases by one, y (k_0/k_m) increases by 1.484. From the temperature dependence study, the activation energy (Ea) and pre-exponential factor (A) were almost identical for two of the enzymes, but a considerable difference was observed in comparison with the third enzyme. Chitosanase and pepsin had nearly identical Ea, but α-amylase was significantly lower. This serves as evidence that the hydrolysis reaction of α-amylase relies on low-barrier hydrogen bonds (LBHBs), which explains its low Ea in actual conditions. The confirmation of this phenomenon was further derived from a similarly considerable difference in the order magnitudes of A between α-amylase and the other two enzymes, which was more than five. Variation of the rate constants of the enzymatic hydrolysis of chitosan with temperature follows the Arrhenius equation.
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Affiliation(s)
- Bi Foua Claude Alain Gohi
- Biotechnology Institute, College of Chemical Engineering, Xiangtan University, Xiangtan 411105, Hunan, China.
| | - Hong-Yan Zeng
- Biotechnology Institute, College of Chemical Engineering, Xiangtan University, Xiangtan 411105, Hunan, China.
| | - A Dan Pan
- Biotechnology Institute, College of Chemical Engineering, Xiangtan University, Xiangtan 411105, Hunan, China.
| | - Jing Han
- Biotechnology Institute, College of Chemical Engineering, Xiangtan University, Xiangtan 411105, Hunan, China.
| | - Jian Yuan
- Biotechnology Institute, College of Chemical Engineering, Xiangtan University, Xiangtan 411105, Hunan, China.
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58
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Dzherayan TG, Vanifatova NG, Burmistrov AA, Lazareva EV, Rudnev AV. Detection and quantification of chitosan aggregates by pressure-assisted capillary zone electrophoresis. JOURNAL OF ANALYTICAL CHEMISTRY 2017. [DOI: 10.1134/s1061934817030042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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59
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Bazunova MV, Shurshina AS, Chernova VV, Kulish EI. A rheological study of molecular and supramolecular organization of chitosan succinamide in a mixed water–etanol solvent. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2017. [DOI: 10.1134/s1990793116060178] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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60
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Natarajan J, Madras G, Chatterjee K. Tailoring the degradation rate and release kinetics from poly(galactitol sebacate) by blending with chitosan, alginate or ethyl cellulose. Int J Biol Macromol 2016; 93:1591-1602. [DOI: 10.1016/j.ijbiomac.2016.02.039] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Revised: 01/30/2016] [Accepted: 02/12/2016] [Indexed: 11/25/2022]
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61
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Antimicrobial effect of emulsion-encapsulated isoeugenol against biofilms of food pathogens and spoilage bacteria. Int J Food Microbiol 2016; 242:7-12. [PMID: 27851985 DOI: 10.1016/j.ijfoodmicro.2016.11.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Revised: 10/27/2016] [Accepted: 11/06/2016] [Indexed: 11/22/2022]
Abstract
Food-related biofilms can cause food-borne illnesses and spoilage, both of which are problems on a global level. Essential oils are compounds derived from plant material that have a potential to be used in natural food preservation in the future since they are natural antimicrobials. Bacterial biofilms are particularly resilient towards biocides, and preservatives that effectively eradicate biofilms are therefore needed. In this study, we test the antibacterial properties of emulsion-encapsulated and unencapsulated isoeugenol against biofilms of Lis. monocytogenes, S. aureus, P. fluorescens and Leu. mesenteroides in tryptic soy broth and carrot juice. We show that emulsion encapsulation enhances the antimicrobial properties of isoeugenol against biofilms in media but not in carrot juice. Some of the isoeugenol emulsions were coated with chitosan, and treatment of biofilms with these emulsions disrupted the biofilm structure. Furthermore, we show that addition of the surfactant Tween 80, which is commonly used to disperse oils in food, hampers the antibacterial properties of isoeugenol. This finding highlights that common food additives, such as surfactants, may have an adverse effect on the antibacterial activity of preservatives. Isoeugenol is a promising candidate as a future food preservative because it works almost equally well against planktonic bacteria and biofilms. Emulsion encapsulation has potential benefits for the efficacy of isoeugenol, but the effect of encapsulation depends on the properties of food matrix in which isoeugenol is to be applied.
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62
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Morgado DL, Assis OBG. Processing and characterization of electrospun nanofibers from poly(lactic acid)/trimethylchitosan blends. Macromol Res 2016. [DOI: 10.1007/s13233-016-4135-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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63
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Ghazanfari M, Ranginkar Jahromi I, Moallemi-Oreh A, Ebadi-Dehaghani H, Akbarzadeh M. Evaluation of mixing efficiency in elaborating of chitosan/cellulose nanocomposite via statistical analyses. Int J Biol Macromol 2016; 93:703-711. [PMID: 27608545 DOI: 10.1016/j.ijbiomac.2016.09.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Revised: 08/29/2016] [Accepted: 09/04/2016] [Indexed: 11/17/2022]
Abstract
Casting films of chitosan (CS)/cellulose nanofibers (CNF) biocomposites containing 0.5-5wt.% of CNF were prepared. Mechanical and physical properties along with scanning electron microscope (SEM) study revealed the best properties for the nanocomposite containing 3wt.% of CNF. Exceeding than this CNF content led to aggregation phenomenon. Then this optimized content nanocomposite was selected in order to investigate the effect of mixing condition on the properties. In the first method the CS and CNF were added simultaneously under ultrasound irradiation. In another method dispersion of CNF was carried out in the solvent separately and then added to the CS solution using ultrasound system. SEM images of the nanocomposites indicated occurrence of aggregation in the simultaneous addition of CS and CNF method. A statistical analysis showed that the best method for effective distribution and dispersion of the nanoparticles within the CS was dispersion of CNF separately in the solvent and addition to the CS solution along with ultrasonic wave's irradiation. The ultrasound induced mixing had a significant effect on the dispersion of the nanoparticles, resulting in significant differences in almost the properties of the nanocomposites.
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64
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Franciane Gonçalves Barbosa H, Margarete Furuyama Lima A, Roberto Taboga S, Cesar Fernandes J, Aparecida de Oliveira Tiera V, José Tiera M. Synthesis and self-assembly study of zwitterionic amphiphilic derivatives of chitosan. J Appl Polym Sci 2016. [DOI: 10.1002/app.44176] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
| | | | | | - Júlio Cesar Fernandes
- Orthopedic Research Laboratory; Hôpital du Sacré-Cœur de Montreal, Université de Montreal; Montreal Canada
| | | | - Marcio José Tiera
- Departamento de Química e Ciências Ambientais; Universidade Estadual Paulista; São Paulo Brazil
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65
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Mwangi WW, Ho KW, Ooi CW, Tey BT, Chan ES. Facile method for forming ionically cross-linked chitosan microcapsules from Pickering emulsion templates. Food Hydrocoll 2016. [DOI: 10.1016/j.foodhyd.2015.10.022] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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66
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Moreno PMD, Santos JC, Gomes CP, Varela-Moreira A, Costa A, Leiro V, Mansur H, Pêgo AP. Delivery of Splice Switching Oligonucleotides by Amphiphilic Chitosan-Based Nanoparticles. Mol Pharm 2016; 13:344-56. [PMID: 26702499 DOI: 10.1021/acs.molpharmaceut.5b00538] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Splice switching oligonucleotides (SSOs) are a class of single-stranded antisense oligonucleotides (ssONs) being used as gene therapeutics and demonstrating great therapeutic potential. The availability of biodegradable and biocompatible delivery vectors that could improve delivery efficiencies, reduce dosage, and, in parallel, reduce toxicity concerns could be advantageous for clinical translation. In this work we explored the use of quaternized amphiphilic chitosan-based vectors in nanocomplex formation and delivery of splice switching oligonucleotides (SSO) into cells, while providing insights regarding cellular uptake of such complexes. Results show that the chitosan amphiphilic character is important when dealing with SSOs, greatly improving colloidal stability under serum conditions, as analyzed by dynamic light scattering, and enhancing cellular association. Nanocomplexes were found to follow an endolysosomal route with a long lysosome residence time. Conjugation of a hydrophobic moiety, stearic acid, to quaternized chitosan was a necessary condition to achieve transfection, as an unmodified quaternary chitosan was completely ineffective. We thus demonstrate that amphiphilic quaternized chitosan is a biomaterial that holds promise and warrants further development as a platform for SSO delivery strategies.
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Affiliation(s)
- Pedro M D Moreno
- INEB-Instituto de Engenharia Biomédica, Universidade do Porto (UPorto) , Rua Alfredo Allen, 208, 4200-135 Porto, Portugal.,i3S-Instituto de Investigação e Inovação em Saúde , UPorto, 4200-135 Porto, Portugal
| | - Joyce C Santos
- INEB-Instituto de Engenharia Biomédica, Universidade do Porto (UPorto) , Rua Alfredo Allen, 208, 4200-135 Porto, Portugal.,i3S-Instituto de Investigação e Inovação em Saúde , UPorto, 4200-135 Porto, Portugal.,CeNano2I, Department of Metallurgical and Materials Engineering, UFMG, 31270-901 Belo Horizonte, Brazil
| | - Carla P Gomes
- INEB-Instituto de Engenharia Biomédica, Universidade do Porto (UPorto) , Rua Alfredo Allen, 208, 4200-135 Porto, Portugal.,i3S-Instituto de Investigação e Inovação em Saúde , UPorto, 4200-135 Porto, Portugal.,Faculdade de Engenharia da UPorto (FEUP), 4200-319 Porto, Portugal
| | - Aida Varela-Moreira
- INEB-Instituto de Engenharia Biomédica, Universidade do Porto (UPorto) , Rua Alfredo Allen, 208, 4200-135 Porto, Portugal.,i3S-Instituto de Investigação e Inovação em Saúde , UPorto, 4200-135 Porto, Portugal.,Faculdade de Medicina da UPorto (FMUP), 4200-319 Porto, Portugal
| | - Artur Costa
- INEB-Instituto de Engenharia Biomédica, Universidade do Porto (UPorto) , Rua Alfredo Allen, 208, 4200-135 Porto, Portugal.,i3S-Instituto de Investigação e Inovação em Saúde , UPorto, 4200-135 Porto, Portugal
| | - Victoria Leiro
- INEB-Instituto de Engenharia Biomédica, Universidade do Porto (UPorto) , Rua Alfredo Allen, 208, 4200-135 Porto, Portugal.,i3S-Instituto de Investigação e Inovação em Saúde , UPorto, 4200-135 Porto, Portugal
| | - Herman Mansur
- CeNano2I, Department of Metallurgical and Materials Engineering, UFMG, 31270-901 Belo Horizonte, Brazil
| | - Ana P Pêgo
- INEB-Instituto de Engenharia Biomédica, Universidade do Porto (UPorto) , Rua Alfredo Allen, 208, 4200-135 Porto, Portugal.,i3S-Instituto de Investigação e Inovação em Saúde , UPorto, 4200-135 Porto, Portugal.,Faculdade de Engenharia da UPorto (FEUP), 4200-319 Porto, Portugal.,Instituto de Ciências Biomédicas Abel Salazar (ICBAS) , UPorto, 4050-313 Porto, Portugal
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Abstract
In chemotherapy a fine balance between therapeutic and toxic effects needs to be found for each patient, adapting standard combination protocols each time. Nanotherapeutics has been introduced into clinical practice for treating tumors with the aim of improving the therapeutic outcome of conventional therapies and of alleviating their toxicity and overcoming multidrug resistance. Photodynamic therapy (PDT) is a clinically approved, minimally invasive procedure emerging in cancer treatment. It involves the administration of a photosensitizer (PS) which, under light irradiation and in the presence of molecular oxygen, produces cytotoxic species. Unfortunately, most PSs lack specificity for tumor cells and are poorly soluble in aqueous media, where they can form aggregates with low photoactivity. Nanotechnological approaches in PDT (nanoPDT) can offer a valid option to deliver PSs in the body and to solve at least some of these issues. Currently, polymeric nanoparticles (NPs) are emerging as nanoPDT system because their features (size, surface properties, and release rate) can be readily manipulated by selecting appropriate materials in a vast range of possible candidates commercially available and by synthesizing novel tailor-made materials. Delivery of PSs through NPs offers a great opportunity to overcome PDT drawbacks based on the concept that a nanocarrier can drive therapeutic concentrations of PS to the tumor cells without generating any harmful effect in non-target tissues. Furthermore, carriers for nanoPDT can surmount solubility issues and the tendency of PS to aggregate, which can severely affect photophysical, chemical, and biological properties. Finally, multimodal NPs carrying different drugs/bioactive species with complementary mechanisms of cancer cell killing and incorporating an imaging agent can be developed. In the following, we describe the principles of PDT use in cancer and the pillars of rational design of nanoPDT carriers dictated by tumor and PS features. Then we illustrate the main nanoPDT systems demonstrating potential in preclinical models together with emerging concepts for their advanced design.
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68
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Ho KW, Ooi CW, Mwangi WW, Leong WF, Tey BT, Chan ES. Comparison of self-aggregated chitosan particles prepared with and without ultrasonication pretreatment as Pickering emulsifier. Food Hydrocoll 2016. [DOI: 10.1016/j.foodhyd.2015.08.019] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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69
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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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70
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Santos JCC, Moreno PMD, Mansur AAP, Leiro V, Mansur HS, Pêgo AP. Functionalized chitosan derivatives as nonviral vectors: physicochemical properties of acylated N,N,N-trimethyl chitosan/oligonucleotide nanopolyplexes. SOFT MATTER 2015; 11:8113-8125. [PMID: 26335751 DOI: 10.1039/c5sm01403d] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Cationic polymers have recently attracted attention due to their proven potential for nonviral gene delivery. In this study, we report novel biocompatible nanocomplexes produced using chemically functionalized N,N,N-trimethyl chitosan (TMC) with different N-acyl chain lengths (C5-C18) associated with single-stranded oligonucleotides. The TMC derivatives were synthesized by covalent coupling reactions of quaternized chitosan with n-pentanoic (C5), n-decanoic (C10), and n-octadecanoic (C18) fatty acids, which were extensively characterized by Fourier transform-infrared spectroscopy (FT-IR) and proton nuclear magnetic resonance ((1)H NMR). These N-acylated TMC derivatives (TMCn) were used as cationic polymeric matrices for encapsulating anionic 18-base single-stranded thiophosphorylated oligonucleotides (ssONs), leading to the formation of polyplexes further characterized by zeta potential (ZP), dynamic light scattering (DLS), binding affinity, transfection efficiency and in vitro cytotoxicity assays. The results demonstrated that the length of the grafted hydrophobic N-acyl chain and the relative amino:phosphate groups ratio (N/P ratio) between the TMC derivatives and ssON played crucial roles in determining the physicochemical properties of the obtained nanocomplexes. While none of the tested derivatives showed appreciable cytotoxicity, the type of acyl chain had a remarkable influence on the cell transfection capacity of TMC-ssON nanocomplexes with the derivatives based on stearic acid showing the best performance based on the results of in vitro assays using a model cell line expressing luciferase (HeLa/Luc705).
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Affiliation(s)
- Joyce C C Santos
- Center of Nanoscience, Nanotechnology and Innovation-CeNano2I, Department of Metallurgical and Materials Engineering, Federal University of Minas Gerais, Av. Antônio Carlos, 6627 - Escola de Engenharia - Bloco 2 - sala 2233, Pampulha, Belo Horizonte/MG 31.270-901, Brazil.
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71
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Lepeltier E, Loretz B, Desmaële D, Zapp J, Herrmann J, Couvreur P, Lehr CM. Squalenoylation of Chitosan: A Platform for Drug Delivery? Biomacromolecules 2015. [DOI: 10.1021/acs.biomac.5b00840] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Elise Lepeltier
- Drug
Delivery (DDEL), Helmholtz-Institute for Pharmaceutical Research Saarland
(HIPS), Helmholtz Centre for Infection Research (HZI), Saarland University, Saarbrücken 66123, Germany
| | - Brigitta Loretz
- Drug
Delivery (DDEL), Helmholtz-Institute for Pharmaceutical Research Saarland
(HIPS), Helmholtz Centre for Infection Research (HZI), Saarland University, Saarbrücken 66123, Germany
| | - Didier Desmaële
- Faculté
de Pharmacie, Institut Galien Paris Sud, Université Paris Sud, UMR CNRS 8612, Paris 92296, France
| | - Josef Zapp
- Institut
für Pharmazeutische Biologie, Saarland University, Saarbrücken 66123, Germany
| | - Jennifer Herrmann
- Microbial
Natural Products, Helmholtz-Institute for Pharmaceutical Research
Saarland (HIPS), Helmholtz Centre for Infection Research (HZI), Saarland University, Saarbrücken 66123, Germany
| | - Patrick Couvreur
- Faculté
de Pharmacie, Institut Galien Paris Sud, Université Paris Sud, UMR CNRS 8612, Paris 92296, France
| | - Claus-Michael Lehr
- Drug
Delivery (DDEL), Helmholtz-Institute for Pharmaceutical Research Saarland
(HIPS), Helmholtz Centre for Infection Research (HZI), Saarland University, Saarbrücken 66123, Germany
- Department
of Pharmacy, Saarland University, Saarbrücken 66123, Germany
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72
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Bochek AM, Vokhidova NR, Saprykina NN, Ashurov NS, Yugai SM, Rashidova SS. The properties of chitosan-cobalt nanoparticle solutions and related composite films. POLYMER SCIENCE SERIES A 2015. [DOI: 10.1134/s0965545x15040033] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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73
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Tian M, Tan H, Li H, You C. Molecular weight dependence of structure and properties of chitosan oligomers. RSC Adv 2015. [DOI: 10.1039/c5ra08358c] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Molecular weight dependence of water solubility of COS.
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Affiliation(s)
- Meng Tian
- Department of Neurosurgery
- West China Hospital
- Sichuan University
- Chengdu
- PR China
| | - Hong Tan
- College of Polymer Science and Engineering
- State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu
- PR China
| | - Hao Li
- Department of Neurosurgery
- West China Hospital
- Sichuan University
- Chengdu
- PR China
| | - Chao You
- Department of Neurosurgery
- West China Hospital
- Sichuan University
- Chengdu
- PR China
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74
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Tyukova IS, Safronov AP, Kotel’nikova AP, Agalakova DY. Electrostatic and steric mechanisms of iron oxide nanoparticle sol stabilization by chitosan. POLYMER SCIENCE SERIES A 2014. [DOI: 10.1134/s0965545x14040178] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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75
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Petrova VA, Bochek AM, Lebedeva MF, Gofman IV, Popova EN, Vlasova EN, Volchek BZ, Nud’ga LA. Chitosan-dextran branched copolymers: Synthesis and properties. POLYMER SCIENCE SERIES B 2014. [DOI: 10.1134/s1560090414030154] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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76
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Tiraferri A, Maroni P, Rodríguez DC, Borkovec M. Mechanism of chitosan adsorption on silica from aqueous solutions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:4980-4988. [PMID: 24725003 DOI: 10.1021/la500680g] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We present a study of the adsorption of chitosan on silica. The adsorption behavior and the resulting layer properties are investigated by combining optical reflectometry and the quartz crystal microbalance. Exactly the same surfaces are used to measure the amount of adsorbed chitosan with both techniques, allowing the systematic combination of the respective experimental results. This experimental protocol makes it possible to accurately determine the thickness of the layers and their water content for chitosan adsorbed on silica from aqueous solutions of varying composition. In particular, we study the effect of pH in 10 mM NaCl, and we focus on the influence of electrolyte type and concentration for two representative pH conditions. Adsorbed layers are stable, and their properties are directly dependent on the behavior of chitosan in solution. In mildly acidic solutions, chitosan behaves like a weakly charged polyelectrolyte, whereby electrostatic attraction is the main driving force for adsorption. Under these conditions, chitosan forms rigid and thin adsorption monolayers with an average thickness of approximately 0.5 nm and a water content of roughly 60%. In neutral solutions, on the other hand, chitosan forms large aggregates, and thus adsorption layers are significantly thicker (∼10 nm) as well as dissipative, resulting in a large maximum of adsorbed mass around the pK of chitosan. These films are also characterized by a substantial amount of water, up to 95% of their total mass. Our results imply the possibility to produce adsorption layers with tailored properties simply by adjusting the solution chemistry during adsorption.
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Affiliation(s)
- Alberto Tiraferri
- Department of Inorganic and Analytical Chemistry, University of Geneva, Sciences II , Quai Ernest-Ansermet 30, 1205 Geneva, Switzerland
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