人类免疫缺陷病毒相关的肠道微生物群影响系统性免疫缺陷和对机会性肠道感染的易感性
Stavros Bashiardes1,2, Melina Heinemann1,3, Lorenz Adlung1,4
1Department of Systems Immunology, Weizmann Institute of Science, Rehovot, Israel.
Nature microbiology
|February 16, 2026
概括
人类免疫缺陷病毒 (HIV) 感染者的肠道微生物组显示出不同的地理模式. 这种肠道疾病与免疫缺陷和肠道免疫力受损有关.
科学领域:
- 微生物组研究 微生物组研究
- 免疫学 免疫学 免疫学
- 传染性疾病 传染性疾病
背景情况:
- 人类免疫缺陷病毒 (HIV) 感染中肠道微生物组的作用尚未完全理解.
- 以前的研究已经描述了艾滋病毒感染者肠道微生物群 (PLWH),但其对宿主免疫和临床特征的影响尚不清楚.
研究的目的:
- 在不同地理位置的PLWH中描述便微生物群.
- 为了研究艾滋病毒相关的肠道失调症,全身免疫缺陷和肠道粘膜免疫之间的关系.
主要方法:
- 枪支元基因组学被用来分析来自以色列和埃塞俄比亚的PLWH和健康对照的便样本.
- 便微生物组移植 (FMT) 在小鼠模型中进行.
- 外围CD4+T细胞计数被用作系统性免疫缺陷的代理指标.
主要成果:
- 观察到地理上不同的微生物模式,包括以色列巴克特罗伊德/普雷沃特拉物种的变化和埃塞俄比亚的Enterobacteriaceae扩张.
- 与较低的外围CD4+T细胞计数相关的与艾滋病毒相关的失生症.
- 来自具有较高CD4+T细胞计数的PLWH的FMT诱导了小鼠的结肠CD4+T细胞,而来自严重免疫缺陷的捐赠者的FMT损害了这种反应和对Cryptosporidium parvum感染的保护.
结论:
- 在PLWH的系统性免疫缺陷与肠道失生症有关.
- 这种失生症有助于肠道粘膜免疫力受损.
- 这些发现强调了肠道微生物群,免疫状态和HIV感染中的粘膜防御之间的复杂相互作用.
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