由ATP触发的,选择性超氧化基产生氧化酶模仿的氧化纳米酶,在生理pH值时表现出高效的抗菌活性
Divya Mehta1, Paresh Sharma1, Sanjay Singh1
1DBT-National Institute of Animal Biotechnology (NIAB), Opposite Journalist Colony, Near Gowlidoddy, Extended Q-City Road, Gachibowli, Hyderabad 500032, Telangana, India; DBT-Regional Centre for Biotechnology (RCB), Faridabad 121001, Haryana, India.
Colloids and surfaces. B, Biointerfaces
|September 24, 2023
概括
新型氧化纳米粒子 (CeO2 NPs) 作为氧化酶模仿剂,在生理pH下与三酸氨酸 (ATP) 生成超氧化基. 这有效地对抗抗生素耐药的细菌,如金黄色葡萄球菌和大肠杆菌.
科学领域:
- 纳米材料科学 科学 纳米材料科学
- 生物化学 生物化学
- 微生物学 微生物学
背景情况:
- 抗生素耐药性对全球健康构成重大威胁.
- 开发新的抗菌策略至关重要.
- 氧化纳米颗粒 (CeO2NP) 显示出作为抗菌剂的前景.
研究的目的:
- 开发具有抗菌活性的氧化酶模拟氧化物纳米粒子 (CeO2 NPs).
- 调查作用机制,专注于激素的产生.
- 评估对常见细菌病原体的疗效.
主要方法:
- 合成和CeO2NP的表征.
- 用三酸 (ATP) 测定生理pH的纳米酶活性.
- 使用特定的清理器和探针检测活性氧物种 (ROS).
- 对抗黄金葡萄球菌和大肠杆菌的抗菌活性的评估.
- 细菌细胞形态和活力的分析.
主要成果:
- 在ATP的存在下,CeO2 NPs在生理pH下表现出氧化酶模仿活性.
- 超氧化基被确定为关键反应物种,而不是基.
- 在3-6小时内观察到对黄金葡萄球菌和大肠杆菌有显著的抗菌活性.
- 细菌细胞形态分析揭示了细胞壁损伤和毛孔形成,导致细胞死亡.
- 活/死试验证实了依赖时间的细菌死亡.
结论:
- 氧化酶模拟CeO2NP在生理pH下产生超氧化基,提供一种新的抗菌机制.
- 这一策略通过破坏细胞结构,有效地杀死金黄色葡萄球菌和大肠杆菌.
- 这些发现表明,有可能对其他致病细菌有更广泛的应用.
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