在模仿牙周炎中,PPARα调节巨细胞两极分化和炎症信号
1Massachusetts Institute of Technology, Cambridge, United States.
Journal of applied oral science : revista FOB
|October 22, 2025
概括
过氧体增殖器激活受体α (PPARα) 的激活会减少炎症,并在暴露于牙周病原体时将巨细胞转移到抗炎状态. 这表明PPARα在调节对口腔细菌的免疫反应中起着关键作用.
科学领域:
- 免疫学和分子生物学
- 牙周病的发病因子 牙周病的发病因子
背景情况:
- 牙周病原体引发由巨细胞介导的炎症反应.
- 巨细胞两极分化为M1 (促炎) 和M2 (抗炎) 现象型,对于宿主防御和组织修复至关重要.
- 过氧体增殖器激活受体α (PPARα) 是一个参与代谢和炎症过程的核受体.
研究的目的:
- 研究PPARα在调节巨细胞极化和炎症信号传递中的作用.
- 确定PPARα激活如何影响巨细胞对牙周病原体的反应,例如 Porphyromonas gingivalis lipopolysaccharide (Pg-LPS).
主要方法:
- 用Pg-LPS刺激THP-1衍生的巨细胞,并用PPARα激动剂 (纤维酸,WY14643) 或对抗剂 (GW6471) 进行治疗.
- 蛋白质表达 (TNF-α,IL-10,p-NF-κB) 和细胞局部化 (NF-κB,IL-10,CD36) 通过西斑和免疫光检测进行了评估.
- 巨分极 (M1/M2标记物) 通过流细胞计量量化;使用记者分析测量NF-κB/AP-1和PPARα转录活性.
主要成果:
- 在对Pg-LPS的反应中,PPARα激活显著降低了TNF-α表达和减弱了NF-κB信号传递.
- 费诺纤维酸治疗增加了IL-10和CD36的表达,促进从M1转向M2巨细胞极化.
- 炎症刺激抑制了PPARα活性,而PPARα激动剂则恢复了这种活性.
结论:
- PPARα激活有效地抑制由牙周细菌成分触发的炎症信号通路 (NF-κB).
- PPARα在调节巨细胞偏向抗炎M2表型方面发挥着关键作用.
- 向PPARα可能是控制牙周病炎症的治疗策略.
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