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Chitosan Grafted With β-Cyclodextrin: Synthesis, Characterization, Antimicrobial Activity, and Role as Absorbefacient and Solubilizer
We synthesized chitosan grafted with β-cyclodextrin (CD-g-CS) from mono-6-deoxy-6-(p-toluenesulfonyl)-β-cyclodextrin and chitosan. Two different amounts of immobilized β-cyclodextrin (β-CD) on CD-g-CS (Q(CD): 0.643 × 10(3) and 0.6 × 10(2) μmol/g) were investigated. The results showed that the amino...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Frontiers Media S.A.
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6335354/ https://www.ncbi.nlm.nih.gov/pubmed/30687698 http://dx.doi.org/10.3389/fchem.2018.00657 |
Sumario: | We synthesized chitosan grafted with β-cyclodextrin (CD-g-CS) from mono-6-deoxy-6-(p-toluenesulfonyl)-β-cyclodextrin and chitosan. Two different amounts of immobilized β-cyclodextrin (β-CD) on CD-g-CS (Q(CD): 0.643 × 10(3) and 0.6 × 10(2) μmol/g) were investigated. The results showed that the amino contents of CD-g-CS with Q(CD) = 0.643 × 10(3) and 0.6 × 10(2) μmol/g were 6.34 ± 0.072 and 9.41 ± 0.055%, respectively. Agar diffusion bioassay revealed that CD-g-CS (Q(CD) = 0.6 × 10(2) μmol/g) was more active against Staphylococcus xylosus and Escherichia coli than CD-g-CS (Q(CD) = 0.643 × 10(3) μmol/g). Cell membrane integrity tests and scanning electron microscopy observation revealed that the antimicrobial activity of CD-g-CS was attributed to membrane disruption and cell lysis. Uptake tests showed that CD-g-CS promoted the uptake of doxorubicin hydrochloride by S. xylosus, particularly for CD-g-CS with Q(CD) = 0.6 × 10(2) μmol/g, and the effect was concentration dependent. CD-g-CS (Q(CD) = 0.6 × 10(2) and 0.643 × 10(3) μmol/g) also improved the aqueous solubilities of sulfadiazine, sulfamonomethoxine, and sulfamethoxazole. These findings provide a clear understanding of CD-g-CS and are of great importance for reducing the dosage of antibiotics and antibiotic residues in animal-derived foods. The results also provide a reliable, direct, and scientific theoretical basis for its wide application in the livestock industry. |
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