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A novel bacterial biofilms eradication strategy based on the microneedles with antibacterial properties

机译:基于抗菌性质的微针的新细菌生物膜消除策略

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Bacterial biofilms possess high adaptive resistance to antimicrobials and human immune system,and it is extremely difficult to kill bacteria or remove biofilms from solid surfaces.Microneedles (MNs) can destroy the integrality of bacterial biofilms,and are helpful for bacterial biofilms eradication.In this study,we report dissolvable MNs composed of chitosan (CS) and zinc nitrate (CS-Zn~(2+) MNs),which combine the antimicrobial properties of CS and Zn~(2+) with the structural characteristics of MNs.The synergistic effect of CS and Zn~(2+) gives the CS-Zn~(2+) MNs fascinating antibacterial properties,and the microscale needle tips structure of MNs make the CS-Zn~(2+) MNs can puncture the bacterial biofilms delivery CS and Zn~(2+) to infection site.Counting the colony forming units assay shown that the antimicrobial properties of the CS-Zn~(2+) MNs was superior to CS MNs.Bacterial live/dead staining assay demonstrated that the CS-Zn~(2+) MNs exhibited better therapeutic effect to eradicate bacterial biofilms than membrane with same ingredient.Besides,3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazoIium bromide (MTT) assays confirmed the excellent cytocompatibility of the CS-Zn~(2+) MNs.Therefore,we believe the CS-Zn~(2+) MNs are promising for applications in bacterial biofilms contaminated sites.
机译:细菌生物膜对抗微生物和人类免疫系统具有高适应性抗性,并且极难杀死细菌或从固体表面上除去生物膜。可以破坏细菌生物膜的完整性,并且有助于细菌生物膜删除。在此研究,我们报告由壳聚糖(Cs)和硝酸锌(Cs-Zn〜(2+)Mns)组成的可溶性MNS,其将Cs和Zn〜(2+)的抗微生物性质与MNS的结构特征相结合。协同效应Cs和Zn〜(2+)的影响给出了Cs-Zn〜(2+)MNS迷人的抗菌性能,MNS的微观针尖结构使CS-Zn〜(2+)MNS可以刺穿细菌生物膜输送CS和Zn〜(2+)对感染部位。计算菌落形成单元测定显示CS-Zn〜(2+)MNS的抗微生物性质优于CS mns.Bacterial Live / Dead染色测定证明了CS -Zn〜(2+)MNS对Eradica表现出更好的治疗效果TE细菌生物膜比具有相同成分的膜。存在,3-(4,5-二甲基噻唑-2-基)-2,5-二苯基四氧化鎓溴(MTT)测定证实了Cs-Zn〜(2+)Mns的优异细胞组成性因此,我们认为CS-Zn〜(2+)MNS在细菌生物膜污染的地位方面对应用。

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