用于协同抗菌应用的CuS纳米酶的生物合成:生物合成参数的优化和抗菌机制的阐明
Jing Yang1, Xiaofan Zhai2, Shiqi Zhang1
1State Key Laboratory of Advanced Marine Materials, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; University of Chinese Academy of Sciences, Beijing 100039, China.
Journal of colloid and interface science
|August 7, 2025
概括
这项研究使用细菌生物合成硫化铜纳米颗粒 (Bio-CuS NPs),创造了一种绿色抗菌剂. 这些新型纳米酶通过激素生成和铜释放有效杀死细菌,为抗生素耐药性提供了可持续的解决方案.
科学领域:
- 纳米技术纳米技术
- 生物技术是生物技术.
- 材料科学 材料科学 材料科学
背景情况:
- 抗生素耐药性细菌感染构成了全球健康的重大威胁.
- 新型抗菌材料对于开发新的治疗策略至关重要.
- 具有过氧化酶类活性的纳米酶显示出作为抗菌剂的前景.
研究的目的:
- 使用硫酸盐减少细菌生物合成硫化铜纳米颗粒 (Bio-CuS NPs).
- 优化生物合成过程,以提高纳米粒子的特性和活性.
- 评估Bio-CuS NPs的抗菌疗效和机制.
主要方法:
- 铜硫化物纳米粒子 (Bio-CuS NPs) 的生物合成,使用减少硫酸盐的细菌作为生物反应器.
- 优化种植参数 (pH,Cu2+度,碳来源).
- 生物CuSNP的表征和与化学合成的纳米粒子 (Abio-CuSNP) 的比较.
- 对抗大肠杆菌和金黄色葡萄球菌的抗菌功效的评估.
- 研究了涉及基生成和Cu2+释放的抗菌机制.
主要成果:
- 与Abio-CuS NP相比,优化的Bio-CuS NP表现出较小的尺寸,增强的结晶性和优异的过氧化酶类活性.
- 生物CuS NPs被生物分子覆盖,具有更大的特定表面积和丰富的硫空缺.
- 在低度的H2O2下,在2小时内达到99.99%的抗菌效果,对大肠杆菌和金黄色杆菌具有抗菌效果.
- 证明了出色的生物相容性,适合环境应用.
结论:
- 建立了一个用于纳米酶生产的绿色生物合成平台.
- 生物CuSNP是有效和可持续的抗菌剂.
- 这些发现突显了生物纳米颗粒在环保抗菌应用中的潜力.
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