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利亚SR 两组系统调节了 Streptococcus mutans 中的氧化应激反应

Shan Huang¹, Jingyun Du¹, Yijun Li¹

¹Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key Lab of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China.

Microbial pathogenesis

|November 4, 2024

概括

Streptococcus mutans 中的 LiaSR 两组分系统有助于它在反应性氧物种 (ROS) 的氧化应激下生存. 这个系统影响基因表达,保持膜完整性,减少DNA损伤,这对于对抗牙至关重要.

科学领域:

微生物学微生物学
分子生物学分子生物学
牙科研究牙科研究

背景情况:

开始性口腔细菌产生反应性氧物种 (ROS),可以抑制致病性Streptococcus mutans (S. mutans).
众所周知,S. mutans中的LiaSR双组件系统能够感知氧化应激,但其分子机制尚不清楚.

研究的目的:

阐明LiaSR双组分系统在S. mutans中氧化应激反应中介的分子机制.
调查LiaSR在S. mutans对过氧化 (H2O2) 的敏感性中的作用.

主要方法:

过氧化 (H2O2) 杀死试验和共聚焦激光扫描显微镜.
酸染色,道测定和定量实时PCR (qRT-PCR) 测试.
对基因表达的分析,包括spxA2,dpr和dinB.

主要成果:

缺乏liaS或liaR的S. mutans突变对H2O2过敏,呈现出增加的ROS水平和膜透性.
R突变显示出更高的DNA碎片化率,spxA2,dpr和dinB基因的表达被改变.
SR系统影响spxA2的表达,并在氧化应激过程中促进膜平衡.

结论:

该LiaSR两组系统对于S. mutans的氧化应激反应和生存至关重要.
SR调节基因表达,包括spxA2,dpr和dinB,以保持细胞完整性和减少DNA损伤.
了解LiaSR的功能为S. mutans的病原和牙损伤的潜在治疗点提供了洞察力.

关键词:

修复DNA的修复DNA的修复在LiaSR两组件系统中,LiaSR是两个组件系统.膜平衡是膜的平衡.氧化应激反应的反应是氧化应激反应.Streptococcus 变种菌的变种菌

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