肠道微生物群的纵向动态在急性移植对宿主病的发病过程中
Ling Qi1,2,3, Jie Peng1,4, Xianbao Huang1,2,3
1Center of Hematology, The First Affiliated Hospital of Nanchang University, Nanchang, China.
Cancer medicine
|December 6, 2023
概括
肠道微生物组合的变化与血液生成干细胞移植 (HSCT) 后的急性移植对宿主疾病 (aGvHD) 有关. 监测这些微生物转移可能为GvHD预防和治疗提供新的策略.
科学领域:
- 微生物学 微生物学
- 免疫学 免疫学 免疫学
- 血液学 血液学 血液学
背景情况:
- 急性移植对宿主疾病 (aGvHD) 是血液造血干细胞移植 (HSCT) 后的一种严重并发症.
- 人们越来越认识到肠道微生物群在aGvHD病变发生中的作用,因此需要进行详细的监测.
- 了解动态微生物转移对于阐明aGvHD机制至关重要.
研究的目的:
- 在HSCT后的aGvHD发展过程中调查肠道微生物群组成的动态变化.
- 确定特定的微生物物种及其与aGvHD发病率和严重程度的相关性.
- 探索aGvHD.肠道微生物群变化与宿主免疫反应 (细胞因子) 之间的关系.
主要方法:
- 在四个关键时间点从HSCT患者收集便样本:前HSCT,移植注入,中性粒细胞移植和移植后30天.
- 使用16S核糖体RNA基因测序,分析了每一个时间点的肠道微生物群组成.
- 分析微生物丰富度,aGvHD状态和细胞因子水平 (IL-4,TNF-α,IL-8,IL-10,IL-2) 之间的相关性.
主要成果:
- 肠道微生物群的多样性从HSCT前减少到移植后的30天,转向致病性社区.
- 患有aGvHD的患者表现出较低的Roseburia (HSCT前) 和较高的Acinetobacter johnsonii (移植输液) 的丰度.
- 中性粒细胞移植时的Rothia mucilaginos与降低aGvHD风险和IL-8分泌有关. 在移植后30天,Lactobacillus paracasei和Acinetobacter johnsonii与aGvHD有关,其中Acinetobacter johnsonii与减少的IL-2和TNF-α相关.
结论:
- 肠道微生物群组成的动态变化,包括特定的细菌种群,与aGv.HD的发展有显著的关联.
- 某些微生物变化似乎具有保护性 (例如,Rothia mucilaginos),而其他变化则与aGvHD风险增加有关 (例如,Acinetobacter johnsonii,Lactobacillus paracasei).
- 在HSCT后的不同阶段对肠道微生物群进行有针对性的操纵,为缓解aGvHD提供了一个潜在的治疗策略.
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