在小鼠肠道中的氨酸呼吸细菌的生态生理学和相互作用
Huimin Ye1,2, Sabrina Borusak3, Claudia Eberl4
1Division of Microbial Ecology, Centre for Microbiology and Environmental Systems Science, University of Vienna, Vienna, Austria.
Nature communications
|September 18, 2023
概括
一种新发现的小鼠肠道细菌,Taurinivorans muris,呼吸 taurine 并产生硫化 (H2S). 这种细菌与其他肠道微生物相互作用,可能有助于病原体的保护.
科学领域:
- 微生物学 微生物学
- 肠道微生物组研究研究
- 细菌生理学 细菌生理学
背景情况:
- 肠道中吸收牛素的细菌产生硫化 (H2S),对宿主健康有复杂的影响.
- 了解这些细菌的特定作用和相互作用对于破译肠道生态系统动态至关重要.
研究的目的:
- 从小鼠肠道中分离和鉴定出一种新型的氨酸呼吸细菌.
- 为了阐明这种新物种的生态生理学和生态利基,Taurinivorans muris.
- 研究其与其他肠道共生动物的相互作用以及对宿主-病原体动态的潜在影响.
主要方法:
- 从小鼠肠道微生物群中分离和纯种植Taurinivorans muris菌株LT0009.
- 生态生理学表征,包括硫代谢途径分析.
- 在 gnotobiotic 小鼠中进行殖民实验.
- 重新分析元基因组数据.
主要成果:
- Taurinivorans muris被确定为一种新的,广泛传播的小鼠肠道物种,与比洛菲拉·瓦斯沃西亚 (Bilophila wadsworthia) 等人类同类不同.
- T. muris专注于体内 taurine 呼吸,独立于宿主饮食或基因型,但依赖于其他细菌从胆汁酸中释放 taurine.
- 殖民化导致牛酸结合胆酸的脱增加,并增强了初生动物的prophage活动,同时减少了Salmonella enterica的丰富性.
结论:
- Taurinivorans muris占据了一个特定的利基,作为一种小鼠肠道硫原体,主要依赖于其主要基质的细菌间相互作用.
- 这项研究强调了T. muris在调节胆酸代谢中的作用,并可能有助于肠道微生物群中的病原体耐药性.
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