肠道免疫成熟取决于与宿主特定微生物群的殖民
Hachung Chung1, Sünje J Pamp, Jonathan A Hill
1Channing Laboratory, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA.
Cell
|June 26, 2012
概括
特定于宿主的肠道微生物群对于适当的免疫系统发育至关重要. 与小鼠微生物不同,与人类或老鼠微生物殖民小鼠的免疫系统未能完全成熟,与小鼠微生物不同.
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:
- 宿主-微生物互惠是免疫系统发育的关键.
- 肠道微生物群在免疫成熟中的作用尚未完全理解.
- 同进化的微生物群可能对宿主免疫恒温是必不可少的.
研究的目的:
- 调查小肠道免疫成熟是否依赖于共同进化的宿主特异性微生物群.
- 为了比较小鼠微生物群 (MMb) 与人类微生物群 (HMb) 对小鼠免疫发育的影响.
- 为了确定免疫成熟所需的特定微生物成分.
主要方法:
- 无细菌 (GF) 的小鼠被MMb或HMb殖民.
- 分析了肠道免疫细胞群 (T细胞,树突细胞) 和抗菌的表达.
- 小鼠被挑战使用沙门氏菌来评估免疫保护.
- 测试了与小鼠细分线状细菌 (SFB) 进行的特定细菌殖民.
主要成果:
- 在小鼠中,HMb和老鼠微生物组未能诱导完全的免疫成熟,类似于GF小鼠.
- 细菌物种组成,特别是Firmicutes,在MMb和HMb之间有所不同.
- SFB部分恢复了T细胞数量,表明其重要性.
- 与HMb相比,MMb对沙门氏菌感染提供了更好的保护.
结论:
- 宿主特定的微生物群对于小鼠的完整肠道免疫成熟至关重要.
- 肠道微生物群的组成显著影响宿主免疫反应和保护.
- 需要对特定微生物相互作用进行进一步的研究,以了解免疫发育.
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