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Updated: Feb 24, 2026

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被热杀死的 Lactobacillus johnsonii 通过选择性转化抑制直接抑制 Th17 细胞效应器功能
Research square
|February 23, 2026
概括
热杀死的 Lactobacillus johnsonii XZ17 直接抑制了 Th17 细胞中的 互白素-17A (IL-17A) 生产. 这种开始性刺激提供了一种针对病理性IL-17A的新方法,同时保持T细胞存活率.
科学领域:
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
- 细胞生物学 细胞生物学
背景情况:
- Th17细胞及其细胞因子介素-17A (IL-17A) 对于宿主防御至关重要,但也与慢性炎症疾病有关.
- 已知共生性乳酸菌种能调节免疫反应,但它们对差异化Th17细胞的直接影响尚不清楚.
研究的目的:
- 为了研究热杀死Lactobacillus johnsonii XZ17 (HK Lj) 对Th17细胞IL-17A产生的直接影响.
- 为了阐明这种相互作用的潜在分子机制,独立于抗原呈现细胞.
主要方法:
- 在实验室培养诱导的Th17 (iTh17) 细胞与HK Lj.
- 分析IL-17A的产生,细胞活力,mRNA水平 (Il17a,Rorc),全球蛋白质合成和其他细胞因子的表达 (IL-10).
- 评估Toll-like和C型莱克受体的参与.
主要成果:
- 在iTh17细胞中,HK Lj直接抑制了IL-17A的产生,而不会影响细胞活力.
- 抑制发生在翻译水平,而没有改变Il17a mRNA水平或全球蛋白质合成.
- 该效应独立于抗原呈现细胞和Toll-like/C型莱克受体信号传递.
结论:
- 热杀死的 Lactobacillus johnsonii XZ17 直接抑制了 Th17 细胞中的 IL-17A 翻译,代表了一种新的免疫调节机制.
- 这种来自共生体的刺激选择性地准病态IL-17A的产生,同时保持T细胞的存活率,这表明了潜在的治疗应用.
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