基于阿基尼的协生菌对多种生物膜的影响
Akhila Pudipeddi1, Mohammed Nadeem Bijle2, Cynthia Yiu3
1Faculty of Dentistry, The University of Hong Kong, Hong Kong; Clemson University, Clemson, SC, USA.
Journal of dentistry
|July 13, 2025
概括
基于氨酸 (Arg) 的协生菌,将Arg与Lacticaseibacillus rhamnosus GG (LRG) 结合起来,有效调节多种口服生物膜. 这一策略促进有益的细菌,抑制有害的病原体,为空预防提供了一种新的方法.
科学领域:
- 口腔微生物学 口腔微生物学
- 协生菌研究协生菌研究
- 生物膜的动力学
背景情况:
- 多种生物膜对口腔健康至关重要,其特定成分与牙损等疾病有关.
- 了解这些生物膜中的生态相互作用对于开发有效的预防策略至关重要.
- 目前的空预防方法有局限性,需要新的方法.
研究的目的:
- 在实验室中研究基于氨酸 (Arg) 的协生菌对多种口服生物膜的影响.
- 评估Arg和Lacticaseibacillus rhamnosus GG (LRG) 单独和组合对生物膜组成,活力和基因表达的影响.
- 评估Arg-LRG协生菌作为空预防策略的潜力.
主要方法:
- 在体外培养多种生物膜 (Streptococcus mutans,S. gordonii,S. sanguinis) 在酸盘上.
- 在72小时内使用不同度的Arg,LRG或它们的组合进行治疗.
- 使用共聚焦显微镜和PMA-qPCR对生物膜矩阵组件 (蛋白质,eDNA,碳水化合物) 和微生物活力的量化.
- 对特定物种毒性和代谢基因相对基因表达的分析.
主要成果:
- 与单独的LRG相比,0.5%的Arg和LRG (Arg-LRG) 的组合显著降低了蛋白质含量和eDNA.
- 同焦成像显示,用0.5%的Arg-LRG处理的生物膜中,活细胞比例最高,生物质增加,结构更光滑.
- 阿尔格-LRG协生菌促进了开始性链球菌 (S. gordonii,S. sanguinis) 的生长,同时降低了 cariogenic 病原体 S. mutans. 的活力.
- 基因表达分析显示,在0.5%的Arg-LRG治疗下,S. mutans病毒性基因的下调和开始代谢基因的上调.
结论:
- 0.5%的Arg-LRG协同生物体显示出调节口腔生物膜生态学的独特能力.
- 这种共生配方调节矩阵成分,有利于共生细菌,并抑制 cariogenic 病原体.
- Arg-LRG协生菌代表了一种有前途的,以生态为导向的方法来预防空,可能为化物限制提供替代方案.
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