增长阶段重要:通过乳酸菌衍生膜囊泡增强免疫力,以及它们与TLR2通路的相互作用
Miriam Sandanusova1,2, Kristyna Turkova2, Eva Pechackova3
1Faculty of Science, Department of Experimental Biology Masaryk University Brno Czech Republic.
来自Lacticaseibacillus rhamnosus CCM7091的膜囊泡 (MVs),特别是晚期静止阶段 (MV48) 的膜囊泡,显示出增强的免疫刺激. 这些MV对治疗纳米载体应用具有前景.
科学领域:
- 微生物学 微生物学
- 免疫学 免疫学 免疫学
- 生物技术是生物技术.
背景情况:
- 膜囊泡 (MVs) 是细菌的沟通工具,但它们的特征因生长阶段而异,影响研究和应用.
- 在MV特性中的不一致性阻碍了它们作为纳米载体和疫苗的使用.
- 了解MV异质性对于优化其治疗潜力至关重要.
研究的目的:
- 在不同的生长阶段 (早期指数式,晚期指数式,晚期静止式) 综合描述来自Lacticaseibacillus rhamnosus CCM7091的MV.
- 评估这些独特的MVs的免疫调节能力和细胞吸收.
- 为潜在的治疗应用确定促进差异性免疫调节的因素.
主要方法:
- 在6小时 (MV6),12小时 (MV12) 和48小时 (MV48) 中从Lacticaseibacillus rhamnosus CCM7091中MVs的分离和表征.
- 蛋白质组分析以比较蛋白质含量差异.
- 在体外测试中使用Caco-2细胞进行吸收和RAW 264.7巨细胞来评估免疫反应 (细胞因子产生,氧化释放).
- 对脂铁醇酸 (LTA) 表达和托尔类受体2 (TLR2) 信号的分析.
主要成果:
- 在早期 (MV6) 和晚期静止阶段 (MV48) 的MV之间观察到蛋白质含量的显著差异.
- 与其他MV相比,MV48的Caco-2细胞吸收率显著更高.
- MV48强烈刺激了巨细胞的免疫反应,包括TNFα,IL-6,IL-10和NO生产的增加.
- 增加的脂肪酸 (LTA) 表达和增强的TLR2信号与MV48相关,这表明LTA在免疫调节中的作用.
结论:
- 来自CCM7091的MVs根据细菌培养生长阶段有很大差异.
- 晚期静止阶段MVs (MV48) 显示出优异的免疫调节效应和细胞吸收.
- 由MV48诱导的增强免疫反应与LTA表达和TLR2信号的增加有关,将它们定位为基于纳米载体的治疗方法的有希望的候选者.
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