在韩国人中,Faecalibacterium prausnitzii菌株KBL1027的菌株特异性抗炎作用
Boram Seo1,2, Kyungchan Jeon1, Woon-Ki Kim1
1Department of Environmental Health Sciences, Graduate School of Public Health, Seoul National University, Seoul, Republic of Korea.
Probiotics and antimicrobial proteins
|February 27, 2024
概括
两种Faecalibacterium prausnitzii菌株,KBL1026和KBL1027,在小鼠中显示出不同的抗炎作用. 菌株KBL1027在治疗大肠炎方面表现出卓越的疗效,这表明菌株特定的功能超出了微生物抗炎分子 (MAM).
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:
- 菌 (Faecalibacterium prausnitzii) 是一种主要的肠道细菌,具有已知的抗炎性质,归因于微生物抗炎分子 (MAM).
- 在F. prausnitzii中存在显著的菌株多样性,需要对益生菌发展进行菌株级功能性研究.
- 了解菌株特异性功能对于充分利用F. prausnitzii的治疗潜力至关重要.
研究的目的:
- 为了研究两种不同的F. prausnitzii分离物,KBL1026和KBL1027.的菌株特异性抗炎功能.
- 为了比较KBL1026和KBL1027在改善小鼠中硫酸 (DSS) 诱导的大肠炎的疗效.
- 探索在抗炎活性中观察到的菌株特异性差异背后的分子机制.
主要方法:
- 从健康的韩国捐赠者中分离和描述两个F. prausnitzii菌株 (KBL1026,KBL1027).
- 在小鼠中使用DSS诱导大肠炎,并给予单个F. prausnitzii菌株.
- 在接受治疗的小鼠中评估结肠炎症,肠道微生物组成和细胞因子分泌 (IL-10).
- 对比基因组学和泛基因组分析以确定菌株特定的遗传特征.
主要成果:
- 无论是KBL1026还是KBL1027,都属于核心的Faecalibacterium amplicon序列变体 (ASV),具有很高的MAM序列相似性.
- 与KBL1026相比,KBL1027菌株对DSS诱导的大肠炎具有显著更大的改善作用,包括减少炎症和恢复肠道微生物群.
- KBL1027超位剂比KBL1026更多地增加了巨细胞中的IL-10分泌,并比较基因组学揭示了KBL1027.27中菌株特异的细胞外多糖生物合成.
结论:
- F. prausnitzii表现出特定菌株的抗炎功能,即使在同一个核心 ASV.
- 在结肠炎中KBL1027的优越疗效可能涉及超越MAM的机制,可能与其独特的细胞外多糖生物合成有关.
- 人类起源和菌株级别特征显著影响F. prausnitzii在益生菌应用中的功能性质.
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