多功能NIR触发的基于纳米酶的微针,用于协同消除MRSA和增强伤口愈合
Wei Qian1,2, Ruixi Li3, Xiyan Zheng3
1Department of Breast Disease Center, General Surgery Medical Center，Key Laboratory of Jiangxi Province for Transfusion Medicine, the 1st Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, 330006, P. R. China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|July 23, 2025
概括
这项研究引入了新型的微针贴片 (MN@CTB),可以有效治疗耐美西林黄金杆菌 (MRSA) 感染的伤口. 这些贴片利用近红外激光激活的纳米酶释放氧化并产生热量,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
- 伤口治愈研究研究 伤口治愈研究
背景情况:
- 耐甲西林黄金葡萄球菌 (MRSA) 伤口感染在由于氧化应激,炎症和血管生成不良而导致的愈合方面存在重大挑战.
- 当前的抗菌策略往往难以有效地解决复杂的伤口微环境.
研究的目的:
- 开发一种多功能纳米酶 (CTB) 用于治疗MRSA感染的伤口.
- 创建微针贴片 (MN@CTB) 结合CTB纳米酶,以增强药物输送和伤口修复.
- 研究MN@CTB在根除MRSA和促进皮肤伤口愈合方面的治疗机制.
主要方法:
- 通过将一氧化 (NO) -原药 (BNN6) 整合到Cu2+-酸网络中,制造CTB纳米酶.
- 通过将CTB纳米酶纳入氨酸甲基酸中,开发MN@CTB补丁.
- 使用体外和体外模型评估抗菌疗效,抗氧化剂,抗炎和血管新生性质.
- 蛋白质组分析以阐明伤口微环境重编程的潜在分子机制.
主要成果:
- 通过NIR触发的NO释放和高热度,CTB纳米酶显示出对MRSA的协同抗菌作用.
- 通过调节氧化应激和炎症,MN@CTB贴片有效地消除了MRSA感染,并促进了伤口愈合.
- MN@CTB激活了Nrf-2/HO-1和sGC/PKG信号通路,分别用于抗氧化和血管效应.
- 蛋白质组数据显示,MN@CTB通过抑制NF-κB和激活VEGF/TGF-β信号来重新编程伤口的微环境.
结论:
- 开发的MN@CTB贴片代表了治疗MRSA感染皮肤伤口的有希望的策略.
- NO释放和NIR高温的协同作用,加上关键信号通路的调节,加速伤口愈合.
- 这种方法提供了一个多功能平台,以应对与感染伤口管理相关的复杂挑战.
相关概念视频
01:24Microbial Corrosion
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...
01:25Clinical Significance of Antibiotic Resistance
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 the One...