Improvement of the stability of glucose oxidase via encapsulation in sodium alginate–cellulose sulfate–poly(methylene-co-guanidine) capsules

Vikartovská, Alica; Bučko, Marek; Mislovičová, Danica; Pätoprstý, Vladimı́r; Lacı́k, Igor; Gemeiner, Peter

doi:10.1016/j.enzmictec.2007.06.010

Cited by 47 publications

(38 citation statements)

References 36 publications

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“…Thus, over the past few decades, cellulose sulfates have undergone intensive study (Kamide and Saito 1994;Mestechkina and Shcherbukhin 2010;Zhang et al 2015c). Due to the presence of negative charged sulfate ester groups, cellulose sulfates exhibit unique biological properties (Zhang et al 2015c), leading to a wide use in biotechnology and pharmaceutics to encapsulate enzymes and cells (Bucko et al 2005;Vikartovska et al 2007), as inhibitors for HIV viruses and anticoagulant effectors (Agarwal et al 2010;Van Damme et al 2008).…”

Section: Esterified Cellulose Containing Charged Moietiesmentioning

confidence: 99%

Functional nanomaterials through esterification of cellulose: a review of chemistry and application

et al. 2018

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As the most abundant biopolymer in nature, cellulose has become a fascinating building block for the design of functional nanomaterials. Owing to the presence of numerous hydroxyl groups, cellulose provides a unique platform for the preparation of new materials via versatile chemical modifications. This critical review aims to present the advances about nanomaterials based on cellulose derivatives with the focus on cellulose esters within the last two decades, including the chemistry and application of these nanostructured materials. This review starts with the introduction on first fundamental aspects about diverse esterification techniques used up to now to modify cellulose. The in situ esterification for the isolation of nanocelluloses and diverse post esterification methods of nanocelluloses for the surface functionalization were highlighted in the following description. Various esterification strategies and further nanostructure constructions have been developed aiming to confer specific properties to cellulose esters, extending therefore their feasibility for highly sophisticated applications, which were summarized with respect to the categories of the introduced ester moieties. Thus, this review assembles and emphasizes the state-of-art knowledge of functional nanomaterials derived from diverse esterified cellulose compounds.

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Section: Esterified Cellulose Containing Charged Moietiesmentioning

confidence: 99%

Functional nanomaterials through esterification of cellulose: a review of chemistry and application

et al. 2018

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“…Because of lower molecular weight cutoff of PMCG microcapsules, in addition to electrostatic interactions, the retention of M75 is influenced by obstruction of hydrogel to antibody diffusion. For example, glucose oxidase prepared from Aspergillus niger, an enzyme of pI $4.7 and molecular weight of 160 kD 44 , immobilized in PMCG microcapsules using a slightly modified protocol compared to this work 26 , showed only 43% encapsulation efficiency with the principal loss of glucose oxidase during the first gelling step in the loop reactor during membrane and microcapsule formation. The principal difference between the immobilization of glucose oxidase and M75 in PMCG microcapsules is the anionic and cationic nature of proteins, respectively, at used pH values of culture media.…”

Section: Discussionmentioning

confidence: 99%

“…The protocol for encapsulation of M75 in the PMCG microcapsules was derived from that developed originally 8 and used for immobilization of whole cells 24,25 and enzymes 26 , and for transplantation of empty microcapsules 7 and encapsulated allogeneic islets 27 to non-human primates. Polyanion solution was prepared by dissolving 1.0% SA-HV and 1.0% CS in saline solution and by adjusting the pH to 7.4.…”

Section: Preparation Of Microspheres With Encapsulated M75 Antibodymentioning

confidence: 99%

Encapsulation of anti-carbonic anhydrase IX antibody in hydrogel microspheres for tumor targeting

Takáčová

Hloušková

Zaťovičová

et al. 2016

Journal of Enzyme Inhibition and Medicinal Chemistry

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Encapsulation is a well-established method of biomaterial protection, controlled release, and efficient delivery. Here we evaluated encapsulation of monoclonal antibody M75 directed to tumor biomarker carbonic anhydrase IX (CA IX) into alginate microbeads (SA-beads) or microcapsules made of sodium alginate, cellulose sulfate, and poly(methylene-co-guanidine) (PMCG). M75 antibody release was quantified using ELISA and its binding properties were assessed by immunodetection methods. SA-beads showed rapid M75 antibody release in the first hour, followed by steady release during the whole experiment of 7 days. In contrast, the M75 release from PMCG capsules was gradual, reaching the maximum concentration on the 7th day. The release was more efficient at pH 6.8 compared to pH 7.4. The released antibody could recognize CA IX, and target the CA IX-positive cells in 3D spheroids. In conclusion, SA-beads and PMCG microcapsules can be considered as promising antibody reservoirs for targeting of cancer cells.

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“…It is easy to dissolve in water and is non-toxic. SEG, also known as kelp glue, is a kind of alginate derivative with linear polymers composed of β-D-mannuronic acid and α-L-guluronic acid [15][16][17][18]. The SEG can agglomerate into clumps associated with a few metal ions and ultimately precipitate in water [19].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Seaweed Glue in the Separation of Copper–Molybdenum Sulphide Ore by Flotation

Chen

et al. 2018

Minerals

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Flotation separation of chalcopyrite from molybdenite was studied using seaweed glue (SEG) as a depressant. Flotation process and mechanism were examined by response surface methodology, flotation tests, adsorption tests, zeta potential measurements and fourier transform infrared (FT-IR) spectra. Response surface methodology with a Box-Behnken design suggested the optimal reagent schedule: pH 4, depressant seaweed glue 197 mg/L, collector amyl xanthate 16 mg/L and frother (methyl isobutyl carbinol) 20 mg/L, and selective separation of chalcopyrite and molybdenite was achieved by flotation. Comparison of SEG and traditional depressants indicated that the SEG could achieve a similar separation efficiency, and exhibited the advantages of environmental compatibility and economic adaptability. Co-adsorption of seaweed glue and amyl xanthate occurred on the surface of molybdenite, and is explained to happen through distinct mechanisms due to the heterogeneous nature of the surface. It is likely that seaweed glue depresses molybdenite by covering the dixanthogen resulting from adsorption of xanthate ions. It is shown that seaweed glue is as effective a depressant of Cu/Mo separation as cyanide.

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Improvement of the stability of glucose oxidase via encapsulation in sodium alginate–cellulose sulfate–poly(methylene-co-guanidine) capsules

Cited by 47 publications

References 36 publications

Functional nanomaterials through esterification of cellulose: a review of chemistry and application

Functional nanomaterials through esterification of cellulose: a review of chemistry and application

Encapsulation of anti-carbonic anhydrase IX antibody in hydrogel microspheres for tumor targeting

The Effect of Seaweed Glue in the Separation of Copper–Molybdenum Sulphide Ore by Flotation

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