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Updated: Mar 7, 2026

Porphyromonas gingivalis as a Model Organism for Assessing Interaction of Anaerobic Bacteria with Host Cells

Porphyromonas gingivalis as a Model Organism for Assessing Interaction of Anaerobic Bacteria with Host Cells

Published on: December 17, 2015

巨细胞的激活和P.P.的入侵牙体是由PPAD和辅助膜子单元调节的

Aleksandra Wielento^1,2, Dominika M Drapała^1,3, Marina Terekhova⁴

¹Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland.

Journal of oral microbiology

|March 6, 2026

概括

Porphyromonas gingivalis 使用基氨酸减弱酶 (PPAD) 来修改fimbriae,这刺激了巨细胞的免疫反应,并有助于细菌的免疫逃避. 这种蛋白质素化是P. gingivalis逃避宿主防御的关键.

科学领域:

微生物学微生物学
免疫学免疫学免疫学
口腔健康口腔健康

背景情况:

Porphyromonas gingivalis 操纵了宿主的免疫反应.
氨基氨酸减弱酶 (PPAD) 是一种P. gingivalis的毒性因子,它能化蛋白质和,劫持免疫反应.
PPAD对免疫细胞的影响,与其已知的对纤维细胞TLR2信号传递的影响不同,尚不清楚.

研究的目的:

为了调查PPAD修饰的fimbriae在P. gingivalis免疫逃避中的作用.
为了确定PPAD修饰的fimbriae对人类单细胞衍生巨细胞 (MDMs) 的影响.

主要方法:

用野生型或突变的P. gingivalis菌株和孤立的fimbriae刺激了MDM.
通过细胞因子测量,RNA-seq,Pi3K/Akt路径分析和细菌入侵试验来评估炎症反应.

主要成果:

在MDM中,PPAD修饰的fimbriae诱导了前炎性反应,包括PGE2基因表达和细胞因子分泌.
缺少辅助子单元的膜没有诱导炎症,PPAD修改保护了P. gingivalis免受巨杀死.
PPAD和辅助膜子单元通过调高与病毒感染和T细胞相互作用相关的基因,促进免疫逃避.

结论:

通过PPAD进行蛋白质素化对于TLR2相关的信号传递至关重要.
这些发现阐明了P. gingivalis免疫逃避的机制,突出了PPAD修饰的fimbriae的作用.

关键词:

这就是为什么PPAD是PPAD.葡萄牙牙牙病 Porphyromonas gingivalis 这种虫害的收费类受体2 收费类受体2 配套的膜子单位.菲姆布里亚 (Fimbriae) 是一个非凡的地区.免疫逃避免疫逃避巨细胞是什么?巨细胞是什么?

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