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Updated: Jun 29, 2025

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MyD88通过调节Th17/Treg细胞和下微生物群失生症之间的动态平衡来加剧因炎症引起的骨损失
Po-Yan Hsiao1, Ren-Yeong Huang1,2,3, Lin-Wei Huang4
1Graduate Institute of Life Sciences, National Defense Medical Center, Taipei, Taiwan.
Journal of periodontology
|March 25, 2024
概括
MyD88信号影响实验性牙周炎,通过调节T助手17 (Th17) 和调节性T (Treg) 细胞平衡,改变下微生物群. MyD88的遗传删除减少了骨损失,并改变了微生物群落.
科学领域:
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
- 口腔生物学 口腔生物学
背景情况:
- 牙周炎是一种复杂的炎症性疾病,与微生物失生症有关.
- 骨髓分化初级响应基因88 (MyD88) 是先天免疫信号传递中的关键适应蛋白.
- MyD88在调节T细胞子集和牙周炎期间口腔微生物群中的作用尚未完全理解.
研究的目的:
- 研究MyD88对T助手17 (Th17) 和调控T (Treg) 细胞分化的影响.
- 以MyD88依赖的方式分析Porphyromonas gingivalis诱导的实验性牙周炎中的下微生物群失调.
- 为了确定MyD88对炎症诱导的气泡骨损失的影响.
主要方法:
- 在P. gingivalis引起的牙周炎模型中使用了MyD88淘汰赛 (Myd88-/-) 和野生型 (WT) 鼠标.
- 使用微型CT和组织学量化膜骨损失,骨质细胞活性 (TRAP) 和RANKL/OPG比率.
- 通过流式细胞计和细胞因子表达 (IL-10,IL-17a) 通过 qPCR 评估 Th17 和 Treg 细胞频率.
- 分析了下微生物组的组成和功能 (FAPROTAX).
主要成果:
- 与WT小鼠相比,Myd88-/-小鼠的骨质损失,骨质结晶发生和RANKL/OPG比率显著降低.
- 在Myd88-/-小鼠中观察到Treg细胞的比例更高,而WT小鼠显示出更多的Th17细胞.
- 缺乏MyD88导致有益的グラム阳性和有氧细菌增加,与WT小鼠的グラム阴性,无氧特征形成鲜明对比.
结论:
- 在实验性牙周炎期间,MyD88信号对调解炎症驱动的骨损失至关重要.
- MyD88调节Th17和Treg细胞之间的平衡,影响疾病的进展.
- MyD88影响下微生物组的组成和代谢功能,有助于牙周炎的发病.
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