适应胆汁和厌氧性极限Vibrio cholerae的菌体吸附
Zoe Netter1, Drew T Dunham1, Kimberley D Seed1
1Department of Plant and Microbial Biology, University of California, Berkeley, Berkeley, California, USA.
mBio
|October 26, 2023
概括
肠道信号发生变化 霍乱病毒
科学领域:
- 微生物学 微生物学
- 病毒学 病毒学
- 传染性疾病 传染性疾病
背景情况:
- 霍乱是一种由Vibrio cholerae引起的腹疾病,尤其在缺乏安全饮用水的地区普遍存在.
- 菌体 (菌体) 是感染细菌的病毒,由于它们的特异性,它们正在被探索作为对抗霍乱等细菌感染的潜在疗法.
- 肠道环境带来独特的挑战和刺激,可以影响细菌行为和宿主-病原体相互作用.
研究的目的:
- 在肠道环境的背景下,研究Vibrio cholerae和vibriophages之间的相互作用.
- 了解肠道刺激如何影响Vibrio cholerae对菌体感染的易感性.
- 为开发基于菌体的霍乱预防策略提供信息.
主要方法:
- 研究了常见肠道刺激对Vibrio cholerae的影响.
- 评估了这些刺激对Vibrio cholerae细胞表面特征的影响.
- 评估了vibriophages在修改后的Vibrio cholerae上的结合和感染效率.
主要成果:
- 肠道刺激会诱导对Vibrio cholerae细胞表面的修饰.
- 这些细胞表面的变化限制了某些菌体的结合和随后的感染.
- 细菌对肠道环境的适应可以限制菌体的有效性.
结论:
- 细菌对肠道环境的适应可以阻碍菌体治疗的有效性.
- 了解这些相互作用对于设计基于菌体的有效霍乱治疗至关重要.
- 需要进一步的研究,以优化菌体治疗在复杂的环境,如人类的肠道.
更多相关视频
07:58Laboratory Techniques Used to Maintain and Differentiate Biotypes of Vibrio cholerae Clinical and Environmental Isolates
Published on: May 30, 2017
11.1K
12:13TransFLP — A Method to Genetically Modify Vibrio cholerae Based on Natural Transformation and FLP-recombination
Published on: October 8, 2012
14.8K
相关概念视频
01:16Viral Replication: Lysogenic Cycle
32
The lysogenic cycle is a crucial viral replication strategy that allows bacteriophages to persist within host cells without immediately destroying them. This process is primarily observed in temperate phages, such as bacteriophage lambda (λ), which infects Escherichia coli. The cycle allows the viral genome to persist across bacterial generations while keeping host cells viable.Integration of the Viral GenomeUpon infection, bacteriophage lambda attaches to the bacterial surface and injects...
32
01:20Viral Replication: Lytic Cycle
32
Bacteriophages, or phages, are viruses that specifically infect bacteria. Among them, T-even bacteriophages, such as T4, exhibit a well-characterized lytic replication cycle in Escherichia coli (E. coli). This process ensures the rapid proliferation of the virus while ultimately leading to the destruction of the bacterial host.Attachment and DNA InjectionThe infection process begins with the recognition and binding of the T4 phage to the E. coli cell surface. Tail fibers of the phage...
32
01:27Chemotaxis in E. coli
23
Chemotaxis in Escherichia coli is a sensory-driven motility mechanism that enables bacteria to navigate chemical gradients, moving toward beneficial environments while avoiding harmful conditions. This process relies on a signal transduction system integrating external chemical cues with flagellar motor control.Chemoreceptors and Signal DetectionE. coli detects chemical gradients through methyl-accepting chemotaxis proteins (MCPs), which are membrane-bound chemoreceptors that sense attractants...
23
01:30Lytic Cycle of Bacteriophages
70.8K
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...
70.8K
00:57Antibiotic Selection
54.5K
Overview
54.5K
00:43Lysogenic Cycle of Bacteriophages
62.3K
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...
62.3K