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在五种普遍存在的人口微生物物种中介电子转移

David Hernández-Villamor¹, Aya Jeaidi¹, Riet Boydens¹

¹Center for Microbial Ecology and Technology (CMET), Ghent University, Frieda Saeysstraat 1, Gent, 9052, Belgium; Center for Advanced Process Technology for Urban Resource Recovery (CAPTURE), Frieda Saeysstraat 1, Gent 9052, Belgium.

Bioelectrochemistry (Amsterdam, Netherlands)

|October 28, 2025

概括

这项研究表明,口腔细菌可以通过细胞外传输电子 (EET). 动力学因介质而异,铁化物使大多数物种能够更快地获得ETE,影响代谢物生产.

科学领域:

微生物学微生物学
电化学电化学电化学
生物能源学生物能源学

背景情况:

人体中电活性微生物物种的认识越来越多,包括病原体.
对细胞外电子转移 (EET) 机制,动力学和生态作用的理解有限.
口腔微生物组在健康和疾病中的重要性.

研究的目的:

研究口腔细菌中介细胞外电子转移 (MET) 的机制和动力学.
评估EET对微生物新陈代谢的影响.
在 *Fusobacterium nucleatum* 中描述MET.

主要方法:

使用旋转盘电极 (RDE) 来测量五种口腔细菌物种的MET.
评估使用 riboflavin 和 ferricyanide 作为电子介质的电子转移.
进行了动力分析 (迈凯利斯-门) 和代谢物 (乙酸盐,丁酸盐,甲酸盐) 分析.

主要成果:

在 *Streptococcus mutans* , *Fusobacterium nucleatum* , *Aggregatibacter actinomycetemcomitans* 和 *Porphyromonas gingivalis* 中使用两种调解剂证实了MET; *A. viscosus* 仅使用里博夫拉.
EET动力学通常是缓慢的 riboflavin,但快速的铁化物,除了 *F.核* 和 *S. mutans*.
介质的存在增强了酸盐的生产;铁化物还触发了酸盐和酸盐在F. nucleatum*中耗尽后的生产.

结论:

口腔细菌表现出多样化的MET能力,其动力学因电子接受器而异.
MET影响细菌的代谢产量,这表明它在电子转移过程中具有生态相关性.
需要对F. nucleatum*中MET的分子机制进行进一步的研究.

关键词:

杆菌核酸 (Fusobacterium nucleatum) 是一种细菌.人类微生物组的人类微生物组通过介导的电子转移.病原体是一种病原体.降氧调解剂的调解剂旋转的磁盘电极可以旋转.

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