特定肠道区域的康门斯酸性酸化产生了对肠病原细菌感染的保护优先效应
Jane L Yang1,2, Haolong Zhu3,4, Puru Sadh4
1Department of Molecular and Cell Biology, University of California Berkeley, Berkeley, California, USA.
Applied and environmental microbiology
|August 13, 2025
概括
一种野生肠道细菌Lactiplantibacillus plantarum通过降低肠道pH来保护Drosophila melanogaster免受Serratia marcescens的感染. 这种酸化机制是优先效应,限制了病原体的生长,增强了宿主的弹性,提供了对肠道健康和益生菌发展的见解.
科学领域:
- 微生物学 微生物学
- 主体-微生物相互作用
- 我们的肠道微生物组.
背景情况:
- 交叉体微生物通过优先效应提供对肠道病原体的保护.
- 机制包括抗微生物化合物,营养素竞争和pH值变化.
- 以前的研究使用了Drosophila melanogaster的非本地Lactiplantibacillus plantarum菌株,显示了不稳定的肠道殖民.
研究的目的:
- 为了研究优先效应,使用天然存在的,肠道殖民的Lactiplantibacillus plantarum菌株来研究优先效应.
- 确定这种菌株对Drosophila melanogaster中肠道病原体Serratia marcescens的保护机制.
- 阐明肠道酸化在介导病原体抑制和宿主保护中的作用.
主要方法:
- 隔离了一种来自野生的Lactiplantibacillus plantarum菌株,用于稳定的肠道殖民.
- 在口服感染Serratia marcescens的Drosophila melanogaster中评估宿主弹性 (寿命,病原体负载).
- 利用体外生长试验和体内肠道成像用pH指标染料分析微生物相互作用和肠道pH.
主要成果:
- 殖民于野生Lactiplantibacillus plantarum菌株的对Serratia marcescens感染的抵抗力增加.
- 乳植物菌植物通过酸化在体外和体内抑制了Serratia marcescens的生长.
- 肠道成像揭示了细菌的空间分离和酸性区域的病原体减少,证实了酸性化作为一种保护性优先效应机制.
结论:
- 一种野生型的Lactiplantibacillus plantarum菌株提供了对Drosophila melanogaster中的Serratia marcescens的保护优先效应.
- 由Lactiplantibacillus plantarum引起的肠酸化是限制病原体生长和增强宿主生存的关键机制.
- 这些发现强调了本地微生物群和宿主微生物相互作用在维持肠道健康和告知益生菌发展方面的重要性.
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