评估不同益生菌菌株在小鼠模型中对细菌和内毒素诱导的败血症的保护作用
Sabeeka Sajjal1, Hasnat Ahmad Bilal1, Ambreen Zahra2,3
1Institute of Microbiology, Faculty of Veterinary Science, University of Agriculture, Faisalabad, 38000, Pakistan.
Probiotics and antimicrobial proteins
|December 27, 2025
概括
人母乳益生菌可以保护人免受格拉姆阴性细菌败血症的影响. 在小鼠模型中,使用特定菌株 (如Streptococcus lactarius和Streptococcus salivarius) 的预治疗改善了生存率,并减少了炎症和器官损伤.
科学领域:
- 微生物学 微生物学
- 免疫学 免疫学 免疫学
- 胃肠病学 胃肠病学
背景情况:
- 格拉姆阴性细菌性败血症,包括由大肠杆菌和沙门氏菌引起的败血症,是全球严重的健康问题.
- 败血症导致高发病率和死亡率,其特点是系统性炎症和器官损伤.
研究的目的:
- 调查四种母乳衍生益生菌菌株对格拉姆阴性细菌败血症的保护潜力.
- 评估Staphylococcus hominis,S. epidermidis,Streptococcus salivarius和S. lactarius在减少败血症引起的病理和炎症方面的疗效.
主要方法:
- 用脂多糖 (LPS),大肠杆菌或沙门氏菌 (Salmonella enterica typhimurium) 的方法建立了鼠类败血症模型.
- 小鼠接受了益生菌预治疗,并评估了包括生存,体重,病理,血清标志物 (ALT,AST,尿素,肌素),便细菌负载和肠道细胞因子表达 (TNF-α,IL-6) 在内的结果.
主要成果:
- 败血症诱导导致高死亡率,体重减轻,肠道损伤,肝酶和标志物升高,病原体负荷增加,以及高调的促炎细胞因子 (TNF-α,IL-6).
- 益生菌预治疗显著改善了生存率,保持了体重,改善了病理病变,使血清生物化学参数正常化,并减少了便病原体数量.
- 在LPS和大肠杆菌败血症模型中,Streptococcus lactarius表现出一致的保护,而Streptococcus salivarius对沙门氏菌诱导的败血症最有效.
结论:
- 特定的母乳衍生益生菌具有显著的保护作用,对抗格拉姆阴性细菌败血症.
- 益生菌干预可以减轻全身炎症,减少器官损伤,并在败血症模型中改善生存结果.
- 这些发现突出了针对性益生菌菌株在治疗败血症方面的治疗潜力.
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