新型乳杆菌菌株缓解大肠杆菌诱导的炎症在尿路感染的老鼠模型
Sini Kang1, Zhihua Peng1, Ru Wei1
1Cooperative Innovation Center of Industrial Fermentation (Ministry of Education & Hubei Province), Key Laboratory of Fermentation Engineering (Ministry of Education), National "111" Center for Cellular Regulation and Molecular Pharmaceutics, Hubei Key Laboratory of Industrial Microbiology, School of Life Sciences and Health, Hubei University of Technology, Wuhan, 430068, Hubei, China.
Probiotics and antimicrobial proteins
|September 24, 2025
概括
热失活的乳酸菌益生菌有效地对抗大肠杆菌,减少尿路感染 (UTI) 的炎症和感染. 这项研究表明,对治疗和预防尿路感染的非抗生素方法有希望.
科学领域:
- 微生物学 微生物学
- 免疫学 免疫学 免疫学
- 泌尿器科 泌尿器科 泌尿器科 泌尿器科
背景情况:
- 尿路感染 (UTI) 是一种常见的细菌感染,通常由大肠杆菌引起,显著影响生活质量,特别是在复发的情况下.
- 抗生素耐药性和副作用需要替代性尿路感染疗法.
- 益生菌正在探索它们在治疗细菌感染方面的潜在治疗益处.
研究的目的:
- 为了研究热不活化的 Lactobacillus helveticus GUT10 和 L. salivarius HHuMin-U 的抗大肠杆菌作用,单独和组合.
- 评估这些益生菌在减轻与尿路感染相关的炎症和感染方面的疗效,在体外和体内.
主要方法:
- 在体外研究中使用LPS诱导的T24膀细胞来评估益生菌对炎症标志物和信号通路的影响.
- 在体内研究中,使用大肠杆菌诱导的尿路感染模型来评估益生菌菌株的保护和治疗作用.
- 评估的关键标志物包括促炎性细胞因子,COX2,PGE2,NF-κB信号传递,ROS产生,细菌负荷和粘膜完整性.
主要成果:
- 益生菌治疗通过抑制NF-κB信号传递和T24细胞中的ROS产生,显著抑制了促炎性细胞因子 (TNF-α,IL-1β,IL-6),COX2和PGE2.
- 在尿路感染小鼠模型中,两种Lactobacillus菌株都表现出显著的保护和治疗作用,减少了膀和尿道粘膜损伤.
- 治疗导致膀和尿液中的大肠杆菌负载减少,膀中乳酸菌的存在增加.
结论:
- 热不活化的 Lactobacillus helveticus GUT10 和 L. salivarius HHuMin-U 在体外和体内表现出强大的抗大肠杆菌活性.
- 益生菌组合有效降低炎症和细菌负载,为尿路感染预防和治疗提供了一个有希望的非抗生素策略.
- 这些发现支持开发基于益生菌的疗法,作为治疗尿路感染的常规抗生素的可行替代品.
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