肺炎链球菌 (Streptococcus pneumoniae) 的殖民化调节了人类鼻腔上皮的反应,以应对呼吸道结膜病毒感染
bioRxiv : the preprint server for biology
|February 12, 2026
概括
婴儿呼吸道同胞性病毒 (RSV) 严重程度与鼻腔细菌有关. 使用Streptococcus pneumoniae的前殖民化降低了RSV水平和调节了表皮反应,这表明它对严重的RSV感染起着保护作用.
科学领域:
- 微生物学 微生物学
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
背景情况:
- 呼吸道同胞性病毒 (RSV) 导致婴儿严重的发病率和死亡率.
- 鼻腔细菌组成与RSV严重程度有关,但机制尚不清楚.
- 在空气-液体界面 (HNO-ALI) 的人类鼻上皮质器官为研究宿主-微生物-病毒相互作用提供了一个模型.
研究的目的:
- 为了研究特定的鼻腔细菌对表皮细胞对RSV感染的反应的影响.
- 定义细菌,RSV和鼻上皮细胞之间的相互作用.
- 了解鼻腔微生物群如何影响RSV疾病的严重程度.
主要方法:
- 已建立的婴儿衍生HNO-ALI模型.
- 单一殖民的HNO-ALI与肺炎链球菌,流感血球菌或Dolosigranulum pigrum.
- 感染了RSV的HNO-ALI,并评估了细菌水平,病毒载量和上皮细胞基因表达.
主要成果:
- RSV 降低了 S. pneumoniae 和 D. pigrum 的水平,但没有降低 H. influenzae 的水平.
- 肺炎前殖民减少了RSV水平,调节了表皮细胞的转录反应.
- S. pneumoniae抑制了RSV诱导的炎症,并阻止了细胞循环的停止,可能减少病毒复制.
结论:
- 鼻子上皮层集成了微生物和病毒信号.
- 鼻腔细菌殖民,特别是S. pneumoniae,可以塑造RSV感染的动态.
- 在研究鼻腔通道中的细菌-病毒-表皮相互作用时,HNO-ALI模型非常有价值.
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