中性粒细胞活化降低了杀死口腔链球菌 gordonii 的能力
Kiana T Bynum1, Michelle Panasiewicz1, Jason G Kay1,2
1Department of Oral Biology, School of Dental Medicine, University at Buffalo, Buffalo, New York, USA.
Molecular oral microbiology
|December 30, 2025
概括
像Streptococcus gordonii这样的口腔细菌可以改变中性粒细胞的功能,影响宿主防御. 与 Porphyromonas gingivalis 等病原体的同时感染会加剧这种情况,可能会恶化牙周病.
科学领域:
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
- 口腔健康 口腔健康
背景情况:
- 中性粒细胞是对抗口腔病原体和预防牙周病的关键.
- 通常是无害的Streptococcus gordonii在某些条件下可以充当病原体.
- 尚不清楚S. gordonii和中性粒细胞之间的相互作用.
研究的目的:
- 研究S. gordonii如何影响中性粒细胞的激活,迁移和杀死.
- 为了确定其他口腔细菌是否影响这种相互作用.
- 在牙周病的背景下了解中性粒细胞的反应.
主要方法:
- 在暴露于S. gordonii.之后研究了中性粒细胞表面标记物表达 (CD63,CD66).
- 对单独的S. gordonii和与P. gingivalis一起检查了中性粒细胞的杀菌活性.
- 评估了体成熟,颗粒含量和细胞因子生产 (IL-1β).
主要成果:
- S. gordonii上调了中性粒细胞表面标记物CD63和CD66,模仿了一个口服中性粒细胞表型.
- 用LPS或P. gingivalis进行预激活可以增强这种S. gordonii诱导的变化.
- P. gingivalis 减少了对S. gordonii的中性粒细胞杀死,这与发酵体成熟受损和IL-1β增加有关.
结论:
- 口腔链球菌有助于与口腔健康相关的中性粒细胞表型.
- 口腔病原体可以改变中性粒细胞的功能,促进S. gordonii的生存.
- 这种相互作用可能会增加牙周病的风险和严重程度.
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