具有NIR增强催化活性的铁单原子纳米酶,用于促进MRSA感染伤口治疗
Qian Liu1,2, Xueliang Liu3, Xiaojun He1
1National Engineering Research Center of Ophthalmology and Optometry, Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, 325027, P. R. China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|February 9, 2024
概括
新的单原子纳米酶有效杀死耐药细菌,如MRSA. 这些铁基催化剂产生反应性氧物种,并利用光热特性消除感染并促进伤口愈合.
科学领域:
- 生物材料科学 生物材料科学
- 纳米技术 纳米技术
- 传染性疾病 传染性疾病
背景情况:
- 甲素耐药黄金葡萄球菌 (MRSA) 由于高死亡率而构成重大威胁.
- 传统的纳米酶面临大小,组成和活性位点密度的限制.
- 开发新的纳米酶策略对于对抗抗生素耐药性感染至关重要.
研究的目的:
- 合成和表征一种新的铁单原子结构 (Fe-SAC) 纳米酶,用于抗菌应用.
- 研究Fe-SAC对MRSA的催化活性和杀菌机制.
- 评估Fe-SAC在治疗MRSA感染伤口中的疗效.
主要方法:
- 用添加的碳支持铁单原子催化剂 (Fe-SAC) 的合成,具有高金属负载 (4.3 wt%).
- 在H2O2暴露时评估过氧化酶类活性和基生成.
- 对MRSA的光热特性和抗菌功效的评估,包括生物膜破坏.
- 在体内测试Fe-SAC用于MRSA伤口感染治疗和愈合.
主要成果:
- Fe-SAC显示出高的催化活性,产生基激素的杀菌作用.
- Fe-SAC的光热特性增强了其抗菌功效.
- Fe-SAC有效地破坏了MRSA细胞膜和生物膜.
- 用Fe-SAC治疗消除了伤口中的MRSA感染并加速了愈合.
结论:
- 单个铁原子纳米酶 (Fe-SAC) 是一个有前途的下一代抗菌剂.
- Fe-SAC为纳米酶设计提供了一种新的方法,具有增强的催化和杀菌性能.
- 这项研究强调了Fe-SAC在打击MRSA感染和改善伤口愈合方面的潜力.
相关概念视频
01:24Microbial Corrosion
111
Microbiologically Influenced Corrosion (MIC) is a significant form of material degradation caused by the metabolic activities of microorganisms. This phenomenon poses substantial challenges across various industries, including oil and gas, maritime, and water treatment sectors.MIC occurs when microorganisms, such as bacteria, archaea, and fungi, colonize metal surfaces, forming biofilms that alter the local electrochemical environment. These biofilms can lead to the production of corrosive...
111
01:25Mechanism of Antibiotic Resistance in MRSA
245
Antibiotic resistance in bacteria arises when microorganisms evolve the ability to withstand drugs designed to kill them or inhibit their growth, rendering once-effective treatments useless. This phenomenon, driven by genetic change and selection under antibiotic exposure, poses a profound threat to modern medicine. Mechanisms include drug-inactivating enzymes (e.g., β-lactamases), efflux pumps that eject antibiotics, mutations altering antibiotic targets, decreased drug uptake, and...
245
01:25Clinical Significance of Antibiotic Resistance
106
Methicillin-resistant Staphylococcus aureus (MRSA) presents a critical public health threat, arising from its capacity to resist β-lactam antibiotics due to acquisition of the mecA gene within the staphylococcal cassette chromosome mec (SCCmec). This gene encodes penicillin-binding protein 2a (PBP2a), which impairs binding efficacy of methicillin and other β-lactams. MRSA has evolved into distinct clonal lineages impacting humans and animals alike, reinforcing its significance within...
106