双杆菌可以通过生产酸盐来保护人免受肠道病原性感染
Shinji Fukuda1, Hidehiro Toh, Koji Hase
1Laboratory for Epithelial Immunobiology, RIKEN Research Center for Allergy and Immunology, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan.
Nature
|January 29, 2011
概括
某些Bifidobacterium菌株通过产生酸盐来保护小鼠免受致命的大肠杆菌O157:H7感染. 这种酸盐增加了肠道防御,并抑制了Shiga毒素转位,提供了一种新的治疗策略.
科学领域:
- 微生物组研究的研究.
- 宿主-病原体相互作用
- 免疫学 免疫学 免疫学
背景情况:
- 人的肠道微生物群,特别是Bifidobacterium物种,为健康带来好处,包括免疫调节和感染保护.
- 这些保护作用背后的精确分子机制在很大程度上是未知的.
- 肠出血性大肠杆菌O157:H7构成了严重的传染病威胁.
研究的目的:
- 阐明Bifidobacterium物种保护抗传染病的分子机制.
- 研究特定细菌基因在对大肠杆菌O157:H7感染的宿主防御中的作用.
主要方法:
- 使用了一种被特定Bifidobacterium菌株殖民的小鼠模型.
- 采用了一种致命感染模型,使用肠出血性大肠杆菌O157:H7.7.
- 集成的多种omics方法来分析分子机制.
主要成果:
- 鉴定了Bifidobacterium中编码ATP结合盒型碳水化合物载体的基因,这对于保护大肠杆菌O157:H7诱导的死亡率至关重要.
- 证明这些细菌的酸盐生产是给予保护的关键因素.
- 显示了Shiga毒素从肠道光层转移到血液中的抑制.
结论:
- 由保护性Bifidobacterium菌株产生的乙增强了肠道上皮细胞介导的防御能力.
- 这种乙酸生产机制为保护宿主免受致命感染提供了一种新的策略.
- 这些发现为对抗细菌病原体的微生物介导保护提供了关键的见解.
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