生物膜
变形链球菌
没食子酸
化学
激进的
催化作用
酶
过氧化物酶
纳米材料
膜
抗氧化剂
生物化学
细菌
纳米技术
材料科学
生物
遗传学
作者
Yaran Wang,Jianan Zhou,Lu Yuan,Fan Wu,Lingping Xie,Xiaojian Yan,Huaping Li,Yuanfeng Li,Linqi Shi,Rongdang Hu,Yong Liu
出处
期刊:Small
[Wiley]
日期:2022-11-17
卷期号:19 (3): e2206657-e2206657
被引量:40
标识
DOI:10.1002/smll.202206657
摘要
Developing nature-inspired nanomaterials with enzymatic activity is essential in combating bacterial biofilms. Here, it is reported that incorporating the carboxylic acid in phenolic/Fe nano-networks can efficiently manipulate their peroxidase-like activity via the acidic microenvironment and neighboring effect of the carboxyl group. The optimal gallic acid/Fe (GA/Fe) nano-networks demonstrate highly enzymatic activity in catalyzing H2 O2 into oxidative radicals, damaging the cell membrane and extracellular DNA in Streptococcus mutans biofilms. Theoretical calculation suggests that the neighboring carboxyl group can aid the H2 O2 adsorption, free radical generation, and catalyst reactivation, resulting in superb catalytic efficiency. Further all-atom simulation suggests the peroxidation of lipids can increase the cell membrane fluidity and permeability. Also, GA/Fe nano-networks show great potential in inhibiting tooth decay and treating other biofilm-associated diseases without affecting the commensal oral flora. This strategy provides a facile and scale-up way to prepare the enzyme-like materials and manipulate their enzymatic activity for biomedical applications.
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