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相关概念视频

Lytic Cycle of Bacteriophages01:30

Lytic Cycle of Bacteriophages

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Bacteriophages, also known as phages, are specialized viruses that infect bacteria. A key characteristic of phages is their distinctive “head-tail” morphology. A phage begins the infection process (i.e., lytic cycle) by attaching to the outside of a bacterial cell. Attachment is accomplished via proteins in the phage tail that bind to specific receptor proteins on the outer surface of the bacterium. The tail injects the phage’s DNA genome into the bacterial cytoplasm. In the...
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Lysogenic Cycle of Bacteriophages00:43

Lysogenic Cycle of Bacteriophages

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In contrast to the lytic cycle, phages infecting bacteria via the lysogenic cycle do not immediately kill their host cell. Instead, they combine their genome with the host genome, allowing the bacteria to replicate the phage DNA along with the bacterial genome. The incorporated copy of the phage genome is called the prophage. Some prophages can re-activate and enter the lytic cycle. This often occurs in response to a perturbation, such as DNA damage, but can also transpire in the absence of...
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相关实验视频

Updated: Jun 26, 2025

A New Screening Method for the Directed Evolution of Thermostable Bacteriolytic Enzymes
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一种来自Enterococcus faecalis菌体的新型内素和应用.

Yingying Xiang1, Suping Wang2, Hao Huang1

  • 1-Department of Stomatology, Yan'an Hospital Affiliated to Kunming Medical University, Kunming, 650031, China.

Microbial pathogenesis
|May 16, 2024
PubMed
概括

菌体内素pEF51对抗药物耐药的Enterococcus faecalis具有强烈的抗菌活性. 这种蛋白质有效地去除生物膜,并保护大鼠模型免受感染,为抗生素提供了潜在的替代品.

关键词:
生物膜是一种生物膜.恩多利辛 (Endolysin) 是一种内分泌物.菌 (Enterococcus faecalis) 是一种菌.菌体 菌体是一种菌体.人口人口的人口人口.

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Last Updated: Jun 26, 2025

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科学领域:

  • 微生物学 微生物学
  • 分子生物学分子生物学
  • 药物发现 药物发现 药物发现

背景情况:

  • 根管治疗后,Enterococcus faecalis是持续感染的主要原因.
  • 在E. faecalis中抗生素耐药性需要新的治疗策略.
  • 菌体内素正在成为潜在的抗菌剂.

研究的目的:

  • 为了克隆,表达和表征菌体endolysin pEF51的抗菌性质.
  • 评估pEF51对E. faecalis浮游生物细胞和生物膜的疗效.
  • 评估pEF51在老鼠感染模型中的体内治疗潜力.

主要方法:

  • 基因克隆和复合蛋白表达的菌体内素pEF51.1.
  • 确定抗菌活性,溶解概况和生物膜去除功效.
  • 在体内的疗效研究使用感染的斯普拉格-道利大鼠模型和16S rDNA分析肠道微生物群.

主要成果:

  • 再组合内素pEF51表现出显著的抗菌活性和广泛的杀菌谱.
  • pEF51在消除E. faecalis生物膜方面表现出很高的有效性.
  • 在体内使用pEF51的治疗显著减少了感染大鼠的形成,对肠道微生物多样性的影响最小.

结论:

  • 虫内素pEF51是一种强大的抗菌剂,可以对抗Enterococcus faecalis.
  • 对于E. faecalis感染,pEF51显示出作为常规抗生素的治疗替代方案的前景.
  • 对pEF51的安全性和疗效进行进一步的研究是必要的.