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在斑马鱼幼虫中, Porphyromonas gingivalis 以一种依赖于牙疼痛的方式诱导神经炎症
Magdalena Widziolek1, Anna Mieszkowska1, Magdalena Marcinkowska2
1Institute of Zoology and Biomedical Research, Jagiellonian University, Kraków, Poland.
Brain, behavior, and immunity
|December 21, 2025
概括
Porphyromonas gingivalis (Pg) 的牙酸驱动神经炎症和脑部入侵,导致神经退行性疾病. 斑马鱼模型显示了依赖痛的Pg存活率,微质激活和改变的行为,突出显示了口腔-大脑轴的联系.
科学领域:
- 神经科学是一个神经科学.
- 微生物学 微生物学
- 免疫学 免疫学 免疫学
背景情况:
- Porphyromonas gingivalis (Pg) 与牙周炎和神经退行性疾病 (如阿尔茨海默氏症) 有关.
- 银皮素,Pg毒性因子,在阿尔茨海默氏症的大脑中发现,并与神经炎症有关.
- Pg脑部入侵和炎症的机制尚不清楚.
研究的目的:
- 对斑马鱼中神经炎症,细胞死亡和大脑入侵的Pg影响进行调查.
- 分析Pg与微质/巨细胞和大脑血管的相互作用.
- 评估Pg感染后的行为变化.
主要方法:
- 使用斑马鱼幼虫模型对系统和局部后脑感染野生类型Pg W83和痛无突变 (ΔK/R-ab).
- 监测神经炎症,细胞死亡,细菌持久性,微质/巨细胞激活,血管完整性和运动活动.
- 给药净化 gingipains 评估它们的直接作用.
主要成果:
- 系统性Pg W83感染增加了细菌存活率和促炎性基因表达,与ΔK/R-ab突变不同.
- Pg W83诱导了微质/巨细胞激活,改变了大脑血管结构,而突变物被清除了.
- 局部后脑感染显示较轻的炎症;系统性扩散对血脑屏障影响至关重要.
- 局部Pg W83感染和gingipain注射增加了微质/巨细胞,Pg W83在激活和诱导细胞死亡方面更有效.
结论:
- 银蛋白对Pg存活,微质激活和神经炎症至关重要.
- Pg的系统传播是影响血脑屏障并引起神经炎症的关键.
- 斑马鱼幼虫是研究大脑中宿主免疫-病原体相互作用的有效模型.
- 这些发现强调了口腔-大脑轴在神经退行症中的作用,需要进一步研究.
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