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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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DNA Bacteriophages01:26

DNA Bacteriophages

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Bacteriophages, or phages, are viruses that specifically infect bacteria, utilizing their genetic material to hijack host cellular machinery for replication. DNA bacteriophages employ single-stranded DNA (ssDNA) or double-stranded DNA (dsDNA) genomes. These phages exhibit diverse replication strategies and host interactions, influencing their ecological roles and applications in biotechnology and medicine.ssDNA BacteriophagesssDNA phages, with their small genomes, utilize unique strategies to...
145
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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Viral Replication: Lytic Cycle01:20

Viral Replication: Lytic Cycle

251
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...
251
Viral Replication: Lysogenic Cycle01:16

Viral Replication: Lysogenic Cycle

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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...
238

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相关实验视频

Updated: Sep 11, 2025

Reconstitution of a Kv Channel into Lipid Membranes for Structural and Functional Studies
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这是一种高效的电荷驱动方法,可以将菌体封装在脂质体中.

Yue Cao1, Mengyu Li1, Dipesh Khanal1

  • 1Advanced Drug Delivery Group, Sydney Pharmacy School, Faculty of Medicine and Health, The University of Sydney, NSW 2006, Australia.

International journal of pharmaceutics
|August 14, 2025
PubMed
概括

一种新的静电方法有效地将菌体封装成脂质体,增强抗菌素治疗耐药感染的稳定性和传递性. 这种可扩展的方法实现了高效率,并保持了菌体的生存能力.

关键词:
飞行员空中导航机组IRIR菌体 (菌体) 的细菌体 (菌体)阴阳性脂质 阴阳性脂质脂质体封装的封装方式菌体的配方 菌体的配方菌体的稳定性 菌体稳定性伪omonas aeruginosa 这种类型的病毒.

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相关实验视频

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科学领域:

  • 生物技术是生物技术.
  • 抗菌疗法是一种抗菌疗法.
  • 纳米技术纳米技术

背景情况:

  • 脂质体封装细菌对通过改善菌体稳定性和向传递来治疗多抗药性感染充满希望.
  • 现有的封装方法效率低 (≤50%),菌体不活化,工业生产的可扩展性差.

研究的目的:

  • 开发和评估一种以静电驱动的封装方法,用于生产菌体脂肪体配方.
  • 通过提高效率,可扩展性和菌体生存能力来克服当前方法的局限性.

主要方法:

  • 使用了阴性脂质 (DOTAP) 和可扩展的微混合系统 (AXFTMmini,局限撞击喷气,微流体芯片).
  • 研究了各种流速比率和总流速以优化封装.
  • 采用传输电子显微镜,原子力显微镜和红外光谱仪进行结构分析.

主要成果:

  • 通过静电相互作用,对于podovirus (PEV31) 和myovirus (PEV1) 实现了90-91%的高封装效率.
  • 维持菌体活力与最小的减少 (<0.2 log10 位数).
  • 产生的均大小的脂质体菌体 (<1000nm,PDI <0.3) 有轻微正的泽塔潜力.

结论:

  • 静电封装方法有效地解决了菌体治疗的关键挑战,包括效率和可扩展性.
  • 这种多功能策略可以容纳多种菌体形态,同时保持生存能力.
  • 开发的脂质体菌体配方有可能用于工业规模的抗微生物应用.