相关实验视频

Updated: Apr 30, 2026

Anti-virulent Disruption of Pathogenic Biofilms using Engineered Quorum-quenching Lactonases

Anti-virulent Disruption of Pathogenic Biofilms using Engineered Quorum-quenching Lactonases

Published on: January 1, 2016

从内部破坏生物膜:光激活分子钻孔功能化的聚合体弥合了膜损伤和质量检测介导的细胞死亡之间的差距

Bela B Berking¹, Sjoerd J Rijpkema¹, Bai H E Zhang¹

¹Systems Chemistry Department, Institute for Molecules and Materials, Radboud University, Nijmegen 6500 HC, The Netherlands.

ACS biomaterials science & engineering

|August 23, 2024

概括

可见光激活了一种新型的半色电机,以机械地破坏细菌生物膜. 这种方法提高了膜的透性,并触发了内部自溶解,提供了对抗耐药性感染的新策略.

科学领域:

生物材料科学生物材料科学
微生物学微生物学
纳米技术纳米技术

背景情况:

由于抗生素耐药性和在医院获得的感染的增加,细菌生物膜对全球健康构成了重大挑战.
目前的战略重点是对抗生物膜,防止进一步发展抗菌耐药性.
机械破坏生物膜和细菌是一种新兴的治疗途径.

研究的目的:

引入一种基于半红 (HTI) 的新型电机,用于机械破坏细菌生物膜.
研究光激活的机械干扰影响细菌膜和生命力的机制.
探索细菌对这种新治疗方法的遗传和细胞内反应.

主要方法:

在聚合物囊泡载体中开发和集成可见光激活的半青 (HTI) 电机.
在可见光下,通过HTI电机对静态细菌进行机械钻探的应用.
细菌外膜透性,膜流动性和活力的分析.
使用qRT-PCR进行基因表达分析,研究细胞包膜反应和自我解离机制.

主要成果:

可见光激活HTI电机成功破坏了细菌生物膜和状细菌.
机械钻探导致外部膜的透性增加,膜流动性降低,细菌活力降低.
观察到自溶解机制的激活,包括菌体应激反应和定数感应.
通过机械干扰启动的内部自我解离级联的潜力被证明.

结论:

光激活的HTI电机系统提供了一种有效的方法来机械地破坏细菌生物膜.
多方面的机制,包括直接的机械损伤和诱导的自我溶解,有助于细菌的消除.
这种节能机械方法是对抗致病生物膜和解决抗生素耐药性的有希望的策略.

关键词:

生物膜是一种生物膜.膜损伤会导致膜损伤.一个纳米钻孔.一些聚合物的聚合物.议员数量检测是指对议员数量进行检测.

更多相关视频

High-throughput Identification of Bacteria Repellent Polymers for Medical Devices

High-throughput Identification of Bacteria Repellent Polymers for Medical Devices

Published on: November 5, 2016

Development of a Polymicrobial Colony Biofilm Model to Test Antimicrobials in Cystic Fibrosis

Development of a Polymicrobial Colony Biofilm Model to Test Antimicrobials in Cystic Fibrosis

Published on: September 20, 2024

相关概念视频

Bacterial Signaling

Bacterial Signaling

Bacterial signaling can occur within bacteria (intracellular) or between bacteria (intercellular). At times, a group of bacteria behaves like a community. To achieve this, they engage in quorum sensing, the perception of higher cell density that causes changes in gene expression. Quorum sensing involves both extracellular and intracellular signaling. The signaling cascade starts with a molecule called an autoinducer (AI). Individual bacteria produce AIs that move out of the bacterial cell...

Biofilms

Biofilms

Biofilms are complex communities of microorganisms encased in a self-produced extracellular polysaccharide matrix attached to surfaces. These microbial consortia can include single or multiple species, providing enhanced survival benefits by forming organized, multilayered structures.The formation of biofilms occurs through four key stages: attachment, colonization, development, and dispersal.During attachment, free-swimming planktonic cells adhere to a surface, often facilitated by...

Gene Regulation in Microbial Communities: Quorum Sensing

Gene Regulation in Microbial Communities: Quorum Sensing

Quorum sensing is a mechanism of bacterial communication that enables coordinated gene expression in response to changes in population density. This facilitates collective behaviors that enhance survival, resource acquisition, and ecological adaptation. This process relies on small signaling molecules called autoinducers that accumulate as bacterial populations grow. When a critical threshold concentration of autoinducers is reached, bacterial cells collectively modify gene expression,...