代谢策略,使口腔相对持续性在下呼吸道环境下
bioRxiv : the preprint server for biology
|July 9, 2025
概括
像Neisseria mucosa这样的口腔细菌可以在炎症的呼吸道中持续存在,显示出增加的抗生素耐药性. 向酸盐呼吸提供了一个潜在的非抗生素策略,用于管理支气管切除症和相关的慢性炎症性疾病.
科学领域:
- 微生物学 微生物学
- 免疫学 免疫学 免疫学
- 呼吸系统医学 呼吸系统医学
背景情况:
- 口腔微生物群越来越多地与口腔以外的慢性炎症性疾病有关,例如支气管炎症.
- 通常在上呼吸道中发现的共生性Neisseria物种,正在机会地殖民着炎症的下呼吸道.
研究的目的:
- 调查使尼塞利亚粘膜在支气管切除症的敌对,状环境中生存的机制.
- 确定导致Neisseria粘膜在炎症呼吸道中的持久性和抗生素耐药性的遗传和代谢因素.
主要方法:
- 利用全基因组转位子测序 (Tn-seq) 来识别Neisseria mucosa中的适应性决定因素.
- 在合成唾液介质 (SCFM2) 中培养Neisseria粘膜,模仿支气管切除症的情况.
- 评估了酸盐还原酶抑制对Neisseria mucosa和Pseudomonas aeruginosa生长的影响.
主要成果:
- 尼塞利亚粘膜在模仿媒介中表现出增强的抗生素耐药性和无氧生长.
- 酸盐呼吸被确定为Neisseria粘膜的无氧生长和竞争性健身的关键,特别是在酸盐丰富的环境中,如唾液.
- 酸盐还原酶的化学抑制可以选择性地抑制Neisseria mucosa和Pseudomonas aeruginosa在状介质中的生长.
结论:
- 酸盐呼吸是一种关键的炎症兼容性特征,支持Neisseria粘膜的生存和在下呼吸道的机会性扩张.
- 向酸盐呼吸是一种潜在的非抗生素治疗策略,用于控制支气管炎症和其他慢性炎症疾病中口腔细菌的持续性.
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