Recyclable antibacterial material: silicon grafted with 3,6-O-sulfated chitosan and specifically bound by lysozyme

Tan, Min; Wang, Hongwei; Wang, Yanyun; Chen, Gaojian; Lin, Yuan; Chen, Hong

doi:10.1039/c3tb21358g

Cited by 33 publications

(27 citation statements)

References 44 publications

(42 reference statements)

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“…Chen also presented an approach that fits into the context of surface regeneration, which was based on an enzyme immobilized on a polymer surface . This surface was active due to the presence of the enzyme lysozyme, which degraded attached E. coli bacteria.…”

Section: Regeneration Of Antimicrobial Activity Of Polymer Surfacesmentioning

confidence: 99%

“…The bacterial debris and the enzyme could be removed from that surface by washing with 1–4 M NaCl. After reloading the surfaces with lysozyme, the surface activity was regenerated . In the context of regeneration by washing, Yin and coworkers presented moderately dense block copolymer brushes with a polycationic core and a polyzwitterionic shell .…”

Section: Regeneration Of Antimicrobial Activity Of Polymer Surfacesmentioning

confidence: 99%

See 1 more Smart Citation

Polymer‐Based Surfaces Designed to Reduce Biofilm Formation: From Antimicrobial Polymers to Strategies for Long‐Term Applications

Riga¹,

Vöhringer²,

Widyaya³

et al. 2017

Macromol. Rapid Commun.

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Contact-active antimicrobial polymer surfaces bear cationic charges and kill or deactivate bacteria by interaction with the negatively charged parts of their cell envelope (lipopolysaccharides, peptidoglycan, and membrane lipids). The exact mechanism of this interaction is still under debate. While cationic antimicrobial polymer surfaces can be very useful for short-term applications, they lose their activity once they are contaminated by a sufficiently thick layer of adhering biomolecules or bacterial cell debris. This layer shields incoming bacteria from the antimicrobially active cationic surface moieties. Besides discussing antimicrobial surfaces, this feature article focuses on recent strategies that were developed to overcome the contamination problem. This includes bifunctional materials with simultaneously presented antimicrobial and protein-repellent moieties; polymer surfaces that can be switched from an antimicrobial, cell-attractive to a cell-repellent state; polymer surfaces that can be regenerated by enzyme action; degradable antimicrobial polymers; and antimicrobial polymer surfaces with removable top layers.

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Section: Regeneration Of Antimicrobial Activity Of Polymer Surfacesmentioning

confidence: 99%

Section: Regeneration Of Antimicrobial Activity Of Polymer Surfacesmentioning

confidence: 99%

Polymer‐Based Surfaces Designed to Reduce Biofilm Formation: From Antimicrobial Polymers to Strategies for Long‐Term Applications

Riga¹,

Vöhringer²,

Widyaya³

et al. 2017

Macromol. Rapid Commun.

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“…The sulfated polysaccharides, in which the sulfate groups are covalently bonded to the polysaccharide chains, may be confirmed in FT‐IR spectra by the presence of very strong bands in the region at around 1,260–1,270 cm −1 . The presence of sulfate groups in the molecular structure of chitosan changes the FT‐IR spectrum of this polysaccharide, and two typical peaks at approximately 1225 and 810 cm −1 are observed, belong to v (O = S=O) and to v (C–O–S) vibrations, respectively . The outer layer of cell wall of M. plumbeus in the FT‐IR spectrum showed some band at 1,266 cm −1 , which intensity have grown up after incubation the mycelium with gold ions.…”

Section: Resultsmentioning

confidence: 85%

Biomineralization of gold by Mucor plumbeus: The progress in understanding the mechanism of nanoparticles’ formation

Maliszewska

Tylus

Chęcmanowski

et al. 2017

Biotechnology Progress

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This contribution describes the deposition of gold nanoparticles by microbial reduction of Au(III) ions using the mycelium of Mucor plumbeus. Biosorption as the major mechanism of Au(III) ions binding by the fungal cells and the reduction of them to the form of Au(0) on/in the cell wall, followed by the transportation of the synthesized gold nanoparticles to the cytoplasm, is postulated. The probable mechanism behind the reduction of Au(III) ions is discussed, leading to the conclusion that this process is nonenzymatic one. Chitosan of the fungal cell wall is most likely to be the major molecule involved in biomineralization of gold by the mycelium of M. plumbeus. Separation of gold nanoparticles from the cells has been carried out by the ultrasonic disintegration and the obtained nanostructures were characterized by UV-vis spectroscopy and transmission electron micrograph analysis. © 2017 American Institute of Chemical Engineers Biotechnol. Prog., 33:1381-1392, 2017.

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“…It seems that under these conditions, the copper salt prevents reaction at O‐3. It is also commonly assumed that the 3,6‐ O ‐disulfated chitosan derivative can be obtained by using chlorosulfonic acid in the presence of a dichloroacetic acid (DCAA)/formamide system (Figure D) . Moreover, to assure selective O‐sulfation, some authors used phthaloylated chitosan with DMF ⋅ SO 3 , followed by deprotection with hydrazine (Figure A).…”

Section: Selective Modificationmentioning

confidence: 99%

Selective Modification of Chitin and Chitosan: En Route to Tailored Oligosaccharides

Carvalho

Queda

Santos

et al. 2016

Chemistry An Asian Journal

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Chitin and chitosan are attractive biopolymers with enormous structural possibilities for chemical modification, creating platforms for new chemical entities with a broad scope of applications, ranging from material science to medicine. During the last few years, incredible efforts have been dedicated to the regioselective modification of these biopolymers paving the way for improved properties and tailored activities. Herein, the most recent advances in chitin/chitosan regioselective modification, reaction conditions, selectivity, and the impact on its applications are highlighted. Moreover, the recent focus on chitooligosaccharides, their regioselective and chemoselective functionalization, as well as their role in biological studies, including molecular recognition with several biological targets are also covered.

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Recyclable antibacterial material: silicon grafted with 3,6-O-sulfated chitosan and specifically bound by lysozyme

Cited by 33 publications

References 44 publications

Polymer‐Based Surfaces Designed to Reduce Biofilm Formation: From Antimicrobial Polymers to Strategies for Long‐Term Applications

Polymer‐Based Surfaces Designed to Reduce Biofilm Formation: From Antimicrobial Polymers to Strategies for Long‐Term Applications

Biomineralization of gold by Mucor plumbeus: The progress in understanding the mechanism of nanoparticles’ formation

Selective Modification of Chitin and Chitosan: En Route to Tailored Oligosaccharides

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