微生物群通过CX(3) CR1(hi) 细胞限制细菌流入中腔淋巴结
Gretchen E Diehl1, Randy S Longman, Jing-Xin Zhang
1Molecular Pathogenesis Program, The Kimmel Center for Biology and Medicine of the Skirball Institute, New York University School of Medicine, New York, New York 10016, USA. Gretchen.Diehl@med.nyu.edu
Nature
|January 22, 2013
概括
肠道微生物群通常会阻止细菌到达介质淋巴结 (MLN). 这项研究表明,肠道微生物指示免疫细胞限制细菌的运输,防止炎症和维持肠道平衡.
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:
- 肠道微生物群对于免疫和代谢平衡至关重要.
- 无法容忍肠道微生物可能导致炎症性肠道疾病 (IBD).
- 肠道免疫系统被认为是受微生物群的教育,以控制对光线抗原的反应.
研究的目的:
- 研究肠道微生物群如何调节对光线细菌的免疫反应.
- 确定细菌被运送到中腔淋巴结 (MLN) 的机制.
主要方法:
- 在稳定状态条件下,在Myd88缺乏条件下,在抗生素诱导的失生症下,在小鼠身上进行了研究.
- 评估了细菌传输到MLN的情况.
- 测量了免疫反应,包括T细胞激活和IgA产生.
- 研究了特定免疫细胞群的作用,例如CX(3) CR1(hi) 单核细胞.
主要成果:
- 在稳定状态下,微生物群抑制了从肠道光层到MLN的细菌运输.
- 在Myd88缺乏的小鼠或在接受抗生素治疗后,非侵入性细菌被贩运到MLN.
- 这种贩运依赖于CCR7并诱导T细胞和IgA反应.
- 以前被认为是非迁移性的单核细胞,负责细菌的运输.
结论:
- 交叉体细菌在调节CX(3) CR1(hi) 单核细胞迁移到MLN中发挥着关键作用.
- 这种调节有助于隔离肠道免疫反应,防止炎症.
- 这些发现提供了关于肠道平衡和IBD病原体的机制的见解.
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