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血管新生驱动的混合水凝具有pH / ROS激活的抗感染和增强的细胞代谢,用于有效的MRSA受损的伤口修复
Liuyang Zhang1, Minhui Ai1, Houjin Zhuang1
1Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an, 710054, China; Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, 710054, China.
Acta biomaterialia
|November 6, 2025
概括
这项研究引入了一种新型抗菌水凝 (CBGCT),通过增强细胞能量和促进血管化的伤口修复来对抗多药耐药细菌 (MDRB) 感染. 智能水凝有效地治愈了MRSA感染的伤口,为感染相关的伤害提供了一个有希望的策略.
科学领域:
- 生物材料科学 生物材料科学
- 再生医学是一种再生医学.
- 传染性疾病 传染性疾病
背景情况:
- 治疗感染多药耐药细菌 (MDRB) 的伤口是具有挑战性的,因为抗生素耐药性,不良血管化和细胞代谢受损.
- 现有的治疗方法往往无法解决感染,炎症和受损组织再生的复杂相互作用.
- 开发能够响应伤口微环境并积极促进愈合的智能生物材料至关重要.
研究的目的:
- 设计一种耐感染的抗菌水凝 (CBGCT),能够模仿线粒体的生物能量供应,以增强血管化的伤口修复.
- 为了研究水凝能够清除活性氧物种 (ROS) 并响应感染部位典型的酸性pH值的能力.
- 评估水凝在促进血管生成,调节炎症和加速甲素耐药黄金葡萄球菌 (MRSA) 感染伤口的修复方面的疗效.
主要方法:
- 制造CBGCT水凝使用可光交叉链接的化聚酸-ε-聚氨酸) 基质,增强铜离子-酸纳米片 (Cu@TA) 和 guar .
- 评估水凝的抗菌活性,ROS清除能力和pH/ROS反应能力.
- 在体内评估水凝在修复MRSA感染的小鼠伤口方面的性能,包括伤口关闭,血管生成和原沉积的测量.
主要成果:
- 在CBGCT水凝中表现出增强的抗菌活性和ROS清除,以应对酸性pH和高ROS水平.
- Cu@TA纳米片的降解促进了对铜离子和酸的控制释放,促进了血管生成和减少炎症.
- 降解的酸盐加速了三酸循环,增加了线粒体膜潜力和ATP水平 (1.4倍以上),确保了细胞过程的生物能源供应.
- 在MRSA感染的小鼠中,CBGCT水凝在第14天完成了94.3%的伤口关闭率,证明了有效地根除了感染并增强了组织修复.
结论:
- 开发的CBGCT水凝作为一种智能,反应敏捷的生物材料,可以有效地对抗MDRB感染,并促进血管化的伤口愈合.
- 通过模仿线粒体功能和释放生物活性成分以响应伤口微环境,水凝优化细胞能量代谢和血管生成.
- 该战略为开发具有精确生物活性的先进水凝提供了有前途的方法,用于治疗复杂的感染相关组织损伤.
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