在人性化微生物群小鼠模型中,阴道微生物动力学和病原体殖民
Marlyd E Mejia1, Vicki Mercado-Evans1,2, Jacob J Zulk1
1Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, USA.
NPJ biofilms and microbiomes
|November 20, 2023
概括
人性化微生物群小鼠 (HMb小鼠) 为研究阴道感染提供了一个新的模型. 这些HMb小鼠对泌尿器官病原体的敏感性降低,有助于研究微生物保护.
科学领域:
- 微生物学 微生物学
- 免疫学 免疫学 免疫学
- 传染性疾病 传染性疾病
背景情况:
- 阴道微生物的组成会影响泌尿器官感染的风险.
- 据信乳酸菌种可以防止感染.
- 缺乏体内模型阻碍了对人类阴道微生物群的机制研究.
研究的目的:
- 评估人类化微生物群小鼠 (HMb小鼠) 作为研究阴道微生物动态和宿主-病原体相互作用的模型的实用性.
- 与常规小鼠相比,研究HMb小鼠对泌尿器官病原体的敏感性.
主要方法:
- 16S rRNA amplicon测序被用来描述不同殖民地C57BL/6J雌性小鼠和HMb小鼠的阴道微生物组成.
- 在HMb小鼠和常规小鼠中,有尿源病原体的挑战,包括B组链球菌 (GBS) 和Prevotella bivia.
- 用特定细菌物种 (大肠杆菌,Ligilactobacillus murinus) 进行预注射对病原体负担的影响在HMb小鼠中进行了评估.
主要成果:
- 阴道微生物组成在老鼠群体内和之间各不相同.
- HMb小鼠表现出不同的社区状态类型,通常由乳杆菌或肠杆菌家族主导.
- 与传统小鼠相比,HMb小鼠对GBS和Prevotella bivia的子宫上升敏感性降低.
- 外源大肠杆菌,但不包括Ligilactobacillus murinus,减少了HMb小鼠的阴道GBS负担.
- 埃舍里希亚和乳杆菌种与子宫GBS的缺失相关.
结论:
- HMb小鼠代表了一种有价值的体内模型,用于研究内源性阴道微生物对泌尿器官病原体的保护作用.
- 该模型有助于对微生物群落及其对感染易感性的影响进行机制性发现.
- 了解特定微生物 (如乳酸菌和肠杆菌) 之间的相互作用对于开发抗尿路感染的策略至关重要.
相关概念视频
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