在治疗上有用的菌根菌体BPs和Muddy需要三醇多聚合物
Katherine S Wetzel1, Morgane Illouz2, Lawrence Abad1
1Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA, USA.
Nature microbiology
|August 29, 2023
概括
用于治疗非结核性菌根菌感染的菌根菌菌体,需要特定的细胞表面甘油脂来感染. 修改这些菌体可以克服抵抗机制,提高治疗潜力.
科学领域:
- 微生物学 微生物学
- 病毒学 病毒学
- 生物化学 生物化学
背景情况:
- 菌根菌是治疗非结核性菌根菌感染的有希望的疗法.
- 了解菌体与宿主相互作用和抵抗机制对于临床应用至关重要.
研究的目的:
- 调查三糖多叶酸 (TPPs) 在菌根菌感染和耐药性的作用.
- 为了识别Mycobacterium abscessus和Mycobacterium smegmatis中菌素耐药性的机制.
- 设计TPP独立的菌体,以提高治疗疗效.
主要方法:
- 通过使用TPP缺乏的真菌细菌突变体研究了菌体吸附和感染.
- 采用转子子体突变发生法来识别参与菌体耐药性的基因.
- 通过遗传和蛋白质分析来表征菌体耐药机制.
- 为TPP独立设计了临床相关的菌体 (BPs和Muddy).
主要成果:
- 三醇多叶酸 (TPPs) 对于菌体BP和Muddy的感染至关重要.
- 失去TPPs通过破坏吸附和感染,使得这些菌体具有抗性.
- TPP合成基因突变是临床隔离物中菌素耐药性的主要原因.
- 在菌体尾尖蛋白中单个氨基酸的替代使得BP和泥TPP独立.
- 在TPP独立的菌素耐药突变体中存在额外的耐药性机制.
结论:
- TPPs是真菌菌体感染力和宿主范围的关键决定因素.
- 菌根细菌中的菌体耐药性经常涉及TPP损失.
- 工程TPP独立的菌体可以克服TPP介导的抵抗.
- 临床部署TPP独立的菌素突变可能会防止耐药性发展.
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