微生物原酶活性与晚期慢性肝病中口腔肠道转位有关
Shen Jin1, Aurelie Cenier1, Daniela Wetzel1
1Translational Microbiome Data Integration, School of Life Sciences, Technical University of Munich, Freising, Germany.
Nature microbiology
|December 30, 2025
概括
转移到肠道的口腔细菌,如Veillonella和Streptococcus,与晚期慢性肝病 (ACLD) 有关. 他们的prtC基因可能会驱动疾病的进展,并作为诊断生物标志物.
科学领域:
- 微生物学 微生物学
- 胃肠病学 胃肠病学
- 免疫学 免疫学 免疫学
背景情况:
- 微生物组的改变与晚期慢性肝病 (ACLD) 有关.
- 微生物对ACLD病原发生的特定机制在很大程度上是未知的.
- 了解这些微生物的贡献对于开发新的治疗策略至关重要.
研究的目的:
- 调查口腔肠道微生物转移在ACLD中的作用.
- 确定与ACLD相关的特定微生物物种和基因.
- 探索这些微生物因素作为ACLD的诊断生物标志物的潜力.
主要方法:
- 来自ACLD患者和健康/败血症对照组的配对唾液和便样本的元基因组分析.
- 细菌菌株和特定基因的识别和丰度量化.
- 用已识别的细菌分离物注射肝纤维化小鼠模型.
- 测量便原酶活性和肠道屏障完整性.
主要成果:
- 在ACLD患者中发现了非常相似的口腔和肠道细菌菌株,包括Veillonella和Streptococcus spp.
- 这些转位细菌拥有独特的prtC基因,编码一种类似原酶的蛋白酶.
- 便中prtC基因的丰度作为一个强大的ACLD生物标志物 (AUCPR = 0.91).
- 鼠标模型显示肝纤维化恶化和肠道屏障损伤在接种患者隔离物后.
结论:
- 口腔肠道微生物转移,特别是Veillonella和Streptococcus spp.的转移 携带prtC基因,与ACLD有机械联系.
- prtC基因及其编码的原酶活性有助于ACLD病理生物学.
- 便prtC基因丰富性代表了ACLD诊断的一个有希望的生物标志物.
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