乳球菌乳酸菌亚种. 克雷莫里斯C60通过功能性修改肠道环境中的树突细胞,促进了B细胞的免疫球蛋白的产生
Alato Okuno1,2,3, Zheng Zheng Shi4,5, Toshio Maekawa3,6,7
1Division of Cellular and Molecular Engineering, Department of Life Technology and Science, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, 3058560, Japan.
Scientific reports
|October 9, 2025
概括
一种新的益生菌菌株,Lactococcus lactis亚种. C60 (C60),通过调节肠道免疫细胞来增强免疫球蛋白A (IgA) 的产生. 这一发现为免疫调节和自我管理健康中的新型益生菌应用提供了潜力.
科学领域:
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
- 胃肠病学 胃肠病学
背景情况:
- 益生菌,特别是乳酸细菌 (LAB),越来越多地被认为是它们在自我管理健康中的作用.
- 通过LAB介导的免疫调节对于减少病原体入侵和增强宿主免疫力至关重要.
- 免疫球蛋白A (IgA) 对天生的防御至关重要,并且识别促进IgA生产的LAB菌株具有重大意义.
研究的目的:
- 为了研究新型益生菌菌株Lactococcus lactis亚种. 克雷莫里斯C60 (C60) 能够促进IgA的产生.
- 阐明C60调节肠道免疫细胞,特别是B细胞和树突细胞 (DC) 的机制.
- 评估C60在免疫调节中的益生菌应用的潜力.
主要方法:
- 利用小鼠模型和骨髓衍生的树突细胞 (BMDCs) 的体外培养来研究热杀死C60 (HK-C60) 的影响.
- 研究了DCs中的托尔类受体 (TLR) - 髓分化初级响应88 (MyD88) 信号通路.
- 对佩耶补丁 (PP) 细胞进行了免疫型定型,并分析了细胞因子的产生 (IL-6,IL-10).
- 使用人类外周血液单核细胞 (PBMCs) 验证的发现.
主要成果:
- 在DC中,HK-C60通过TLR-MyD88通路刺激了促炎和抗炎细胞因子的产生.
- 在小鼠中,HK-C60的胃内注射显著增加了系统性IgA的产生.
- 在皮耶尔贴片中,HK-C60诱导了B细胞扩张和功能上调.
- 确定DC衍生的IL-6和IL-10是B细胞C60增强的IgA生产的关键媒介.
- 人类PBMC也显示在HK-C60刺激时IgA的产生增加,这取决于IL-6和IL-10.
结论:
- 乳球菌乳酸菌亚种. 克雷莫里斯C60是一种新型益生菌菌株,具有增强肠道IgA生产的能力.
- C60通过调节树突细胞和B细胞来起作用,涉及TLR-MyD88通路和关键细胞因子IL-6和IL-10.
- 这种菌株对专注于免疫调节和加强粘膜免疫力的益生菌应用具有前景.
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