异常的阴道微生物群与miRNA相关 准HIV-宿主相互作用组
bioRxiv : the preprint server for biology
|August 12, 2025
概括
阴道失调症,或细菌性阴道炎 (BV),通过调节失调微型miRNAs来改变感染HIV的粘膜屏障. 这些miRNAs在表观遗传上控制宿主通路,抑制免疫力并增加艾滋病毒风险.
科学领域:
- 生殖健康 生殖健康
- 微生物学 微生物学
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
背景情况:
- 阴道失生症会影响粘膜屏障,可能增加艾滋病毒感染风险.
- 微米RNA是内源性非编码RNA,在女性生殖道抗病毒免疫力中起到很大程度上未知的作用.
- 了解阴道病原生物的miRNA失调对于艾滋病预防策略至关重要.
研究的目的:
- 研究微型RNA在调解阴道失生症对HIV感染的粘膜屏障的影响中的作用.
- 为了确定细菌性阴道炎 (BV) 中失调的特定miRNA及其基因.
- 阐明与BV相关的miRNAs对免疫抑制和艾滋病毒风险的贡献机制.
主要方法:
- 分析了来自141名女性的宫和阴道样本,通过努根特得分对微生物群进行分类.
- 在21名女性的子集上进行枪支元基因组测序,用于微生物组分类.
- 使用EdgeSeq-NextGen和差异表达分析对外体miRNA的量化.
- 使用MirTarBase和基因本体学丰富分析进行表观遗传标预测.
主要成果:
- 在正常,中级和细菌性阴道炎 (BV) 微生物群之间,MiRNA 概况显著不同.
- 与正常微生物群相比,BV与更多的失调miRNAs (588) 相关,针对400多个基因.
- BV调节失调的miRNAs对细胞因子水平和HIV宿主相互作用体内的向基因产生免疫抑制作用.
- 由*G. vaginalis*主导的微生物组调节失调的特定miRNAs与BV相关的miRNAs明显重叠.
结论:
- 由阴道失调调节的微米RNAs,特别是BV,有助于免疫失衡.
- 这些失调的miRNAs促进了HIV利用的细胞通路,增加了感染风险.
- 通过BV进行MiRNA介导的免疫抑制,呈现出一种新的预测HIV风险的机制.
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