由ligilactobacillus衍生的细胞外囊泡抑制肠道病原体的生长和毒性
Saba Miri1, Walid Mottawea1,2, Luana Leao1
1NuGut Research Platform, School of Nutrition Sciences, Faculty of Health Sciences, University of Ottawa, Ottawa, ON, K1N 6N5, Canada.
Probiotics and antimicrobial proteins
|December 16, 2024
概括
来自肠道细菌Ligilactobacillus物种的细胞外囊泡 (EV) 显示出作为治疗剂的潜力. 这些细菌EV抑制了沙门氏菌和坎皮洛巴克特等肠道病原体的生长和毒性.
科学领域:
- 微生物学 微生物学
- 细菌的沟通方式
- 我们的肠道微生物组.
背景情况:
- 格拉姆阳性肠道细菌通过细胞外囊泡 (EV) 进行交流.
- 有限的研究存在于格拉姆阳性细菌EVs及其与肠道病原体的相互作用.
- 研究潜在的益生菌肠道共生体对于了解肠道健康至关重要.
研究的目的:
- 描述三种Ligilactobacillus物种EV的结构,蛋白质含量和抑制作用.
- 评估这些EVs对沙门氏菌Typhimurium和Campylobacter jejuni的抗菌和抗病毒活性.
- 探索肠道细菌EVs对肠道病原体的治疗潜力.
主要方法:
- 使用超离心,密度梯度净化和尺寸排除色谱,对电动汽车进行隔离和表征.
- 评估EV纯度,剂量依赖性,结构和蛋白质组概况.
- 对S. Typhimurium和C. jejuni的抗菌和抗病毒活性的评估,包括基因表达分析.
主要成果:
- 电动汽车从Lg. 唾液流体 UO.C109 和 Lg. saerimneri UO.C121 抑制了 S. Typhimurium 的作用.
- 电动汽车从Lg. Salivarius UO.C249 抑制了 C. jejuni. 的发生.
- 富含抗微生物蛋白质和80-90纳米大小的F3 EV部分显示出最高的抑制活性和降低了病原体的关键毒性因子.
结论:
- 肠道细菌EV具有显著的抗菌和抗病毒性质.
- 特定的EV亚群,如F3分数,是肠道病原体的强有力的抑制剂.
- 细菌EV代表了开发针对肠道感染的新型治疗剂的有希望的途径.
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