肠道微生物组介导的营养物质改变了围炎中的机会性细菌生长
Kale S Bongers1, Thomas L Flott2, Larisa Yeomans2
1Division of Pulmonary, Critical Care, and Occupational Medicine, Department of Internal Medicine, Carver College of Medicine, University of Iowa, Iowa City, Iowa, United States.
概括
肠道微生物组在腹膜炎期间显著影响腹膜环境,影响病原体的营养可用性. 调节微生物组可能为腹膜炎提供新的治疗策略.
科学领域:
- 微生物学 微生物学
- 胃肠病学 胃肠病学
- 免疫学 免疫学 免疫学
背景情况:
- 腹膜炎是腹部手术和肠道穿孔的严重并发症,通常导致败血症和高死亡率.
- 腹膜炎的发病原因尚未完全理解,特别是腹膜营养环境在支持病原体生长中的作用.
- 在感染期间肠道微生物群对腹营养水平的影响在很大程度上是未知的.
研究的目的:
- 研究肠道微生物组如何塑造腹炎期间腹内代谢物度.
- 要确定微生物组调制是否会影响腹腔中的病原体生长.
- 为了确定特定的营养素受微生物群的影响,影响细菌的增殖.
主要方法:
- 使用由脂聚糖 (LPS) 和液诱导的腹膜炎的小鼠模型.
- 采用微生物组调制技术,包括无菌和用抗生素治疗的小鼠.
- 应用ex vivo腹膜炎建模和核磁共振 (NMR) 代谢学来分析腹膜微环境.
主要成果:
- 无论是LPS还是Cecal Slurry Peritonitis,都诱导了高丰度腹代谢物的持续变化,例如增加的谷氨酸和酸盐,以及降低的葡萄糖和丁酸盐.
- 这些代谢变化在微生物缺乏的小鼠 (无细菌和接受抗生素治疗) 中显著减弱或被废除.
- 与传统的败血症小鼠相比,来自败血症,微生物群枯竭的小鼠的腹膜洗支持了较少的常见腹内病原体的细菌生长.
结论:
- 肠道微生物组是围炎期间围营养环境的关键决定因素,直接影响病原体的生长.
- 准肠道微生物组为缓解腹膜炎严重程度和风险提供了潜在的治疗途径.
- 了解微生物组介导的营养物质的可用性是开发新膜炎治疗方法的关键.
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