酸路径对黄金葡萄球菌的新陈代谢和病变发生的影响
Jisun Kim1, Gyu-Lee Kim1, Javiera Norambuena2
1Department of Pathology, Immunology and Laboratory Medicine, Center for Immunity and Inflammation, Rutgers New Jersey Medical School, Newark, New Jersey, United States of America.
PLoS pathogens
|July 13, 2023
概括
酸通路 (PPP) 对于金黄色葡萄球菌的毒性至关重要. 破坏pgl基因会损害ATP的产生,核酸合成和对氧化应激的抵抗力,影响感染模型.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 代谢途径 代谢途径
背景情况:
- 黄金葡萄球菌 (Staphylococcus aureus) 是一个重要的人类病原体,引起各种感染.
- 酸酸盐通路 (PPP) 在S. aureus生理学和发病过程中的作用尚未得到充分研究.
- 之前的查发现了一种涉及PPP的条件必需基因 (SAUSA300_1902, pgl).
研究的目的:
- 研究pgl基因的功能及其在S. aureus. PPP中的作用.
- 为了阐明PGL中断对黄金菌代谢,毒性和抗压力的影响.
主要方法:
- 使用了转体子测序 (Tn-seq) 和RNA测序 (RNA-seq).
- 进行了新陈代谢和13C标记实验.
- 使用了体外测试和多种体内感染模型 (呼吸道,皮肤,败血症).
主要成果:
- 缺少PGL显著降低了ATP水平,呼吸和核酸生物合成 (UMP,GMP).
- 突变者表现出生物膜形成受损,细胞外DNA减少,对氧化应激 (H2O2,paraquat) 的抵抗力降低.
- 墙壁泰可酸的变化影响过氧化的敏感性.
结论:
- 由pgl调节的PPP对各种感染类型中S. aureus毒性至关重要.
- 代谢途径极大地影响金黄色细菌的发病,影响核酸合成,应激反应和生物膜形成.
- 针对PPP组件可以提供针对黄金菌感染的新型治疗策略.
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