细菌生长阶段决定了Porphyromonas gingivalis外膜囊泡的产量,蛋白质组成和牙周病原性
Hongchen Mao1,2,3, Ting Gong1,2,3, Yuting Sun1,2,3
1Department of Endodontics, Stomatological Hospital of Chongqing Medical University, Chongqing, China.
Frontiers in cellular and infection microbiology
|October 30, 2023
概括
来自P. gingivalis*后期生长阶段的外膜囊泡 (OMV) 在牙周病中表现出更大的致病性. 这些OMVs促进M1巨细胞的两极分化,并抑制牙周带干细胞功能,导致严重的牙周损伤.
科学领域:
- 微生物学 微生物学
- 免疫学 免疫学 免疫学
- 牙周病学 牙周病学
背景情况:
- * Porphyromonas gingivalis * (W83) 是慢性牙周炎的关键病原体,与全身性疾病有关.
- 来自P. gingivalis的外膜囊泡 (OMV) 对毒性和致病性至关重要.
- 了解不同生长阶段的OMVs的作用对于理解牙周炎病原体至关重要.
研究的目的:
- 为了研究不同生长阶段的P. gingivalisOMVs的生物功能.
- 为了比较在不同的生长阶段分离的OMVs的物理化学特性和致病性.
- 阐明OMVs对巨细胞极化和牙周带干细胞 (PDLSCs) 的影响.
主要方法:
- 使用同位素标记的相对和绝对量化 (iTRAQ) 来分析蛋白质组成.
- 评估巨细胞两极分化 (M1/M2亚型) 和细胞因子表达 (IL-6,IL-1β).
- 评估PDLSC的增殖,迁移,骨质分化和NLRP3炎症酶激活.
- 在老鼠中构建P. gingivalis诱导的牙周病模型.
主要成果:
- 晚期日志和静止生长阶段的OMV显示出不同的蛋白质配置和增强的致病性.
- 晚期日志和静止的OMV促进了M1巨细胞的两极分化,并增加了炎症性细胞因子的产生.
- 这些OMV显著抑制了PDLSC的增殖,迁移和骨质生成,并增加了NLRP3炎症酶的激活.
- 在体内模型表明,静止的OMV与前日志和后日志的OMV相比,诱导了更严重的牙周损伤.
结论:
- 晚期日志和静止的 *P. gingivalis* OMV 在牙周疾病中具有显著更高的致病性.
- 通过调节免疫反应和影响干细胞行为,OMVs有助于牙周破坏.
- 这些发现强调了OMV生长阶段在疾病进展中的关键作用.
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