Porphyromonas gingivalis 捆绑的膜与外膜囊泡,共生细胞和纤维细胞相互作用
Julian Lambertz1, Eva Miriam Buhl2, Christian Apel3
1Division of Oral Microbiology and Immunology, Department of Operative Dentistry, Periodontology and Preventive Dentistry, Rheinisch-Westfälische Technische Hochschule (RWTH) University Hospital, 52074 Aachen, Germany.
International journal of molecular sciences
|January 10, 2026
概括
Porphyromonas gingivalis fimbriae形成捆绑和外膜延伸,与其他细菌相互作用. 辅助蛋白FimCDE可能稳定这些结构,并调解外膜囊泡结合.
科学领域:
- 微生物学 微生物学
- 口腔生物学 口腔生物学
- 细菌病原体的产生
背景情况:
- Porphyromonas gingivalis 是牙周病的关键病原体,与全身性疾病有关.
- 膜,特别是FimA,是P. gingivalis.病毒的关键毒性因素.
- 之前的研究表明,在P. gingivalis菌株ATCC 33277.7中,FimA fimbriae长时间捆绑.
研究的目的:
- 研究P. gingivalis fimbriae在不同FimA类型中的结构变异和相互作用.
- 探索膜辅助蛋白 (FimCDE) 在膜结构和外膜囊泡 (OMV) 形成中的作用.
- 检查P. gingivalis与其他口腔细菌和宿主细胞的相互作用.
主要方法:
- 传输电子显微镜 (TEM) 和扫描电子显微镜 (SEM) 用于可视化膜膜和外膜结构.
- 使用Fusobacterium nucleatum或Streptococcus oralis的双种培养物.
- 与人类牙纤维细胞 (HGFs) 的共同培养.
- 对外膜囊泡 (OMVs) 的蛋白质组分析.
主要成果:
- 在所有经过检查的P. gingivalis FimA类型和P. gulae中都会发生骨结合,但由于囊形成而受到阻碍.
- 在大多数菌株中观察到管状和链状外膜延伸 (OME).
- 首次发现了与Fimbriae相关的OMV (FAV).
- 捆绑的fimbriae,OME和FAV似乎与F. nucleatum和S. oralis.进行中介连接.
- 蛋白质组分析表明,OMV中FimA与辅助蛋白 (FimCDE) 的特定比率.
结论:
- 骨捆绑是P. gingivalis和相关物种中保存的特征.
- FimCDE辅助蛋白可能在稳定捆绑的膜和调解OMV相互作用方面发挥作用.
- 观察到的结构 (捆绑的膜,OME,FAV) 可能有助于细菌间和细菌宿主细胞粘附和毒性.
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