表面性质、细菌运动性及流体动力学条件对细菌表面感知及其初始黏附的影响

Implication of Surface Properties, Bacterial Motility, and Hydrodynamic Conditions on Bacterial Surface Sensing and Their Initial Adhesion.

作者信息

Zheng Sherry, Bawazir Marwa, Dhall Atul, Kim Hye-Eun, He Le, Heo Joseph, Hwang Geelsu

机构信息

Department of Preventive & Restorative Sciences, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, United States.

Center for Innovation & Precision Dentistry, School of Dental Medicine, School of Engineering and Applied Sciences, University of Pennsylvania, Philadelphia, PA, United States.

出版信息

Front Bioeng Biotechnol. 2021 Feb 12;9:643722. doi: 10.3389/fbioe.2021.643722. eCollection 2021.

Abstract

Biofilms are structured microbial communities attached to surfaces, which play a significant role in the persistence of biofoulings in both medical and industrial settings. Bacteria in biofilms are mostly embedded in a complex matrix comprised of extracellular polymeric substances that provide mechanical stability and protection against environmental adversities. Once the biofilm is matured, it becomes extremely difficult to kill bacteria or mechanically remove biofilms from solid surfaces. Therefore, interrupting the bacterial surface sensing mechanism and subsequent initial binding process of bacteria to surfaces is essential to effectively prevent biofilm-associated problems. Noting that the process of bacterial adhesion is influenced by many factors, including material surface properties, this review summarizes recent works dedicated to understanding the influences of surface charge, surface wettability, roughness, topography, stiffness, and combination of properties on bacterial adhesion. This review also highlights other factors that are often neglected in bacterial adhesion studies such as bacterial motility and the effect of hydrodynamic flow. Lastly, the present review features recent innovations in nanotechnology-based antifouling systems to engineer new concepts of antibiofilm surfaces.

摘要

生物膜是附着于表面的结构化微生物群落,在医疗和工业环境中生物污垢的持续存在方面发挥着重要作用。生物膜中的细菌大多嵌入由细胞外聚合物组成的复杂基质中,这些聚合物提供机械稳定性并抵御环境逆境。一旦生物膜成熟,就极难杀死细菌或从固体表面机械去除生物膜。因此,中断细菌表面传感机制以及随后细菌与表面的初始结合过程对于有效预防生物膜相关问题至关重要。鉴于细菌黏附过程受包括材料表面性质在内的许多因素影响,本综述总结了近期致力于理解表面电荷、表面润湿性、粗糙度、形貌、硬度以及性质组合对细菌黏附影响的研究工作。本综述还强调了在细菌黏附研究中常被忽视的其他因素,如细菌运动性和流体动力流的影响。最后,本综述介绍了基于纳米技术的防污系统的最新创新,以设计抗生物膜表面的新概念。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3e2a/7907602/b7509d71ec94/fbioe-09-643722-g001.jpg

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