Biomacromolecules:生物发酵纳米形貌对壳聚糖抗菌作用的影响

2018-03-02 MedSci MedSci原创

来自几丁质的壳聚糖是从真菌和节肢动物获得的天然的生物相容性聚合物之一。在这项工作中,我们报告了在尖锐纳米形貌存在的情况下CHI的杀菌效力。采用单步深反应离子刻蚀技术(DRIE)制造高纵横比纳米结构表面(NSS)。然后,在平坦和纳米结构表面上使用逐层(LBL)浸涂工艺进行CHI涂覆。使用革兰氏阴性(G-ve)菌大肠杆菌和革兰氏阳性(G + ve)菌金黄色葡萄球菌测试涂覆有CHI(Si_CHI)和涂覆

来自几丁质的壳聚糖是从真菌和节肢动物获得的天然的生物相容性聚合物之一。在这项工作中,我们报告了在尖锐纳米形貌存在的情况下CHI的杀菌效力。

采用单步深反应离子刻蚀技术(DRIE)制造高纵横比纳米结构表面(NSS)。然后,在平坦和纳米结构表面上使用逐层(LBL)浸涂工艺进行CHI涂覆。使用革兰氏阴性(G-ve)菌大肠杆菌和革兰氏阳性(G + ve)菌金黄色葡萄球菌测试涂覆有CHI(Si_CHI)和涂覆有NSS 的CHI(NSS_CHI)硅表面的抗菌功效。

结果显示,与Si_CHI和NSS底物相比,NSS_CHI对G-ve和G+ve微生物表现出优异的抗菌性能。使用扫描电子显微镜(SEM)和荧光显微镜探究细菌在所有表面上的形态和活力。另外,使用结晶紫(CV)染色对大肠杆菌和金黄色葡萄球菌的所粘附表面进行生物膜定量。结果发现NSS_CHI在其表面具有最小的生物膜形成,表现出优异的抗菌性能。

这项研究表明,CHI的抗菌和抗菌膜效率可以通过将其与锐利的纳米形貌相结合而得到增强。

原始出处:

Tripathy A, Pahal S, et al., Impact of Bioinspired Nanotopography on the Antibacterial and Antibiofilm Efficacy of Chitosan. Biomacromolecules. 2018 Feb 28. doi: 10.1021/acs.biomac.8b00200. [Epub ahead of print]

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    2019-01-11 sunylz
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    2018-03-30 yb6560
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    2018-03-04 10518094zz
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