生物膜作为细菌对抗抗生素的战场盔甲:挑战和打击策略
Sara Bano1, Noor Hassan2, Muhammad Rafiq3
1Applied Environmental and Geomicrobiology Laboratory, Department of Microbiology, Quaid-i-Azam University, Islamabad 45320, Pakistan.
Microorganisms
|October 28, 2023
概括
细菌生物膜通过各种防御机制保护微生物免受抗生素的侵害. 像CRISPR/Cas和纳米技术这样的新策略显示出克服公共卫生面临的这一重大挑战的希望.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 抗微生物耐药性 抗微生物耐药性
背景情况:
- 细菌生物膜是包裹在细胞外聚合物质 (EPS) 中的社区,表现出独特的特性,与自由活细胞不同.
- 生物膜提供了至关重要的生存优势,包括对抗生素和其他环境压力因素的显著耐药性.
- 生物膜介导抗生素耐药性的机制包括物理障碍,化学防御和遗传适应.
研究的目的:
- 审查目前对细菌生物膜抗生素耐药性的理解.
- 讨论参与生物膜发育的基因和定数感应的作用.
- 突出新兴技术,以打击生物膜诱导的抗生素耐药性.
主要方法:
- 关于细菌生物膜和抗生素耐药性的科学出版物的文献综述.
- 分析生物膜用来抵抗各种类型抗生素的机制.
- 探索生物膜形成和抵抗中的遗传因素和定数感应.
- 研究新的治疗方法,包括CRISPR/Cas,纳米技术和细菌治疗.
主要成果:
- 生物膜采用多种不同的抗生素策略,包括eDNA生产,化学中和和基因调控.
- 特定的抗生素类别被不同的生物膜防御机制所抵制.
- 定数感应在生物膜的发展和抗生素耐药性的建立中发挥着关键作用.
- 新兴技术为消除生物膜和克服耐药性提供了潜在的解决方案.
结论:
- 细菌生物膜由于其多面性耐药机制而构成复杂的挑战.
- 了解生物膜耐药性的遗传和分子基础对于开发有效的治疗方法至关重要.
- 像CRISPR/Cas,纳米技术和菌体疗法这样的新策略对未来的干预有希望.
- 打击生物膜诱导的抗生素耐药性对于改善全球公共卫生结果至关重要.
相关概念视频
Biofilms
29
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...
29
Defense Against Bacterial Pathogens
1.4K
The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
1.4K
Biological Methods for Microbial Control
42
Biological agents offer an effective means of controlling microbial growth by leveraging natural processes like predation, competition, and the secretion of antimicrobial substances.Predatory bacteria such as Bdellovibrio species target and kill pathogens like Salmonella and E. coli. They are widely used in poultry farms to control infections. Myxococcus species help combat plant-pathogenic fungi. These naturally occurring predators serve as eco-friendly alternatives to chemical pesticides and...
42
Bacterial Signaling
32.5K
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...
32.5K
Gene Regulation in Microbial Communities: Quorum Sensing
23
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,...
23
Development of Antibiotic Resistance
17
Antibiotic resistance is a major public health concern that arises when bacteria evolve mechanisms to withstand the effects of antibiotic treatments. This resistance can be intrinsic, acquired through genetic mutations, or transferred between bacteria via horizontal gene transfer. The development of antibiotic resistance poses significant challenges in treating bacterial infections and necessitates ongoing research to develop new therapeutic strategies.Intrinsic resistance occurs when bacterial...
17


