https://scholars.lib.ntu.edu.tw/handle/123456789/638577
標題: | Engineering pH-sensitive erodible chitosan hydrogel composite containing bacteriophage: An interplay between hydrogel and bacteriophage against Staphylococcus aureus | 作者: | REUBEN WANG Yeh, Yu-Jia An, Yu-Ning Virly |
關鍵字: | Chitosan; Controlled release; Phage-resistant | 公開日期: | 31-十二月-2023 | 卷: | 253 | 期: | Pt 7 | 來源出版物: | International Journal of Biological Macromolecules | 摘要: | Encapsulation of phages represents a key approach for improving phage stability and controlling phage delivery dosage. The hydrogel made from positively charged quaternized chitosan (QCS) and multivalent crosslinker, aldehyde-modified poly(xylitol sebacate)-co-poly(ethylene glycol) (APP) was introduced for the first time for drug (phage 44AHJD) delivery. The freeze-thawing (FT) treatment enhanced the porous structure and the stress resistance of native hydrogel with increased compression stress (stiffness) from 10 to 20 kPa. The stiffness of the phage-loaded hydrogel (FTP) was suitable for the proper release of phage particles and polymer chains, both working synergistically against bacterial growth. The FTP followed the Korsmeyer-Peppas model's anomalous diffusion of phage particles at different temperatures (30-45 °C) and pH (6.6-8.5) conditions. FTP was sensitive to pH, which released more phage particles at pH-neutral conditions, while the release under acidic and alkaline conditions was more based on gel degradation. The high biocompatibility of FTP hydrogel at its working concentration of 30 mg mL-1 was demonstrated through a hemolysis ratio of <2 %. Sixty percent of the total encapsulated phages and 6 mg mL-1 of hydrogel debris were released after 10 h of hydrogel submerge treatment, which can fight the growing bacteria and the emergence of phage-resistant bacteria. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/638577 | ISSN: | 01418130 | DOI: | 10.1016/j.ijbiomac.2023.127371 |
顯示於: | 食品安全與健康研究所 |
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