激光诱导转移的抗菌纳米颗粒用于混合物种细菌生物膜失活
Alena Nastulyavichus1, Eteri Tolordava1, Sergey Kudryashov1,2
1P. N. Lebedev Physics Institute of Russian Academy of Sciences, 119991 Moscow, Russia.
Materials (Basel, Switzerland)
|June 28, 2023
概括
铜纳米颗粒有效抑制了常见的细菌生物膜,包括金黄色葡萄球菌和大肠杆菌. 这项研究强调了铜纳米颗粒 (Cu NPs) 对混合物种生物膜的强大抗菌特性.
科学领域:
- 纳米技术 纳米技术
- 微生物学 微生物学
- 材料科学 材料科学 材料科学
背景情况:
- 细菌生物膜在各种环境中存在重大挑战,原因是它们对传统治疗的耐药性.
- 了解新型纳米材料的抗菌机制对于开发有效的生物膜控制策略至关重要.
研究的目的:
- 通过激光诱导向前转移 (LIFT) 合成铜和银纳米粒子.
- 为了评估这些纳米颗粒的抗菌活性与常见的混合物种细菌生物膜相比.
- 研究铜纳米颗粒对细菌细胞活力和膜完整性的影响.
主要方法:
- 通过激光诱导向前转移 (LIFT) 合成铜 (Cu) 和银 (Ag) 纳米粒子,度为20μg/cm2.
- 测试抗菌活性对*黄金葡萄球菌*,*大肠杆菌*和*假球菌*的混合物生物膜.
- 使用活/死细菌活力套件评估细菌细胞活力,并使用FTIR光谱分析分子变化的分析.
主要成果:
- 铜纳米颗粒证明了对测试的细菌生物膜的完全抑制.
- 观察到细菌度显著减少,大小为5-8个数量级.
- 在CuNP处理后,FTIR光谱显示脂肪酸区域的变化,这表明分子运动自由度下降.
结论:
- 通过LIFT合成的铜纳米颗粒对临床相关的细菌生物膜表现出强大的抗菌活性.
- 这些发现表明,Cu NPs可以破坏细菌细胞膜,导致显著的生存能力下降.
- 对Cu NP机制的进一步研究可能会导致用于消除生物膜的新型抗菌剂.
更多相关视频
07:40Production of Metal Nanoparticles by Pulsed Laser-ablation in Liquids: A Tool for Studying the Antibacterial Properties of Nanoparticles
Published on: June 2, 2017
15.1K
09:29In Vivo Investigation of Antimicrobial Blue Light Therapy for Multidrug-resistant Acinetobacter baumannii Burn Infections Using Bioluminescence Imaging
Published on: April 28, 2017
9.4K
相关概念视频
01:29Biofilms
60
Biofilms are complex communities of microorganisms encased in a self-produced extracellular polysaccharide matrix attached to surfaces. These microbial consortia can include single or multiple species, providing enhanced survival benefits by forming organized, multilayered structures.The formation of biofilms occurs through four key stages: attachment, colonization, development, and dispersal.During attachment, free-swimming planktonic cells adhere to a surface, often facilitated by...
60
01:27Combined Effects of Drugs: Synergism
4.1K
Synergism is a useful mechanism where combining two or more drugs is more effective than each constituent used alone. Such combinations are also called supra-additive interactions. The drugs collectively enhance the final therapeutic effect by acting on different targets. Another advantage is that the low dose of each constituent drug is sufficient to achieve the desired effect. This helps reduce the duration of therapy and lower the adverse effects of these drugs.
Such synergistic combinations...
Such synergistic combinations...
4.1K