肠道微生物群控制了移植与宿主疾病,而不依赖于捐赠者与宿主的遗传差异
Motoko Koyama1, Daniel S Hippe2, Sujatha Srinivasan3
1Translational Science and Therapeutics Division, Fred Hutchinson Cancer Center (FHCC), Seattle, WA 98109, USA.
Immunity
|July 22, 2023
概括
肠道微生物通过改变MHC-II.II的肠道上皮细胞表达来影响干细胞移植 (SCT) 后急性移植对宿主疾病 (aGVHD) 的严重程度. 范科米辛降低了aGVHD,这表明治疗的微生物点.
科学领域:
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
- 移植 移植 移植 移植
背景情况:
- 急性移植对宿主疾病 (aGVHD) 是全原干细胞移植 (SCT) 的重大并发症,肠道表现导致高早期死亡率.
- 肠道微生物群调节MHCII类 (MHC-II) 表达在肠内皮质细胞 (IECs) 上,这可以促进aGVHD.
- 来自不同供应商的基因相同的小鼠之间的肠道微生物组合的差异与不同的aGVHD严重程度和状MHC-II表达相相关.
研究的目的:
- 研究肠道微生物群在调节MHC-II表达中的作用及其对aGVHD严重性的影响.
- 确定与MHC-II诱导相关的特定细菌种群及其治疗潜力.
- 验证移植前微生物,HLAII类表达和SCT患者的临床结果之间的关联.
主要方法:
- 在小鼠中利用共住和抗生素治疗来识别影响MHC-II表达的细菌种群.
- 在移植期间服用口服万科米辛,以评估其对CD4+T细胞介导的aGVHD的影响.
- 分析了一组临床SCT队列,以关联移植前的微生物概况和HLAII类表达与aGVHD和死亡率.
主要成果:
- 具有不同供应商来源的基因相同的小鼠表现出明显的肠道微生物群和叶MHC-II表达,导致aGVHD严重程度变化.
- 确定了积极和消极调节MHC-II表达的细菌种群.
- 移植前期的万科米辛剂量显著减弱了CD4+T细胞介导的aGVHD.
- 临床数据证实了移植前微生物,HLAII类表达和SCT患者的aGVHD/死亡率之间的联系.
结论:
- 移植前的肠道微生物群组成通过调节宿主免疫反应,对aGVHD的发病产生产生重大影响.
- 特定的细菌种类可以诱导MHC-II的表达,独立于遗传差异,导致GVHD.
- 针对特定的微生物群体,例如对菌素敏感的诱导剂,提供了一种潜在的治疗策略,以减轻SCT后的GVHD.
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