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生物模拟蛋白质结构转换调节了化纳米粒子广泛杀菌活性的激活和抑制
Wenke Ji1, Yongjin Hu1, Xiao Wang1
1Hubei Key Laboratory of Material Chemistry and Service Failure, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, PR China.
Acta biomaterialia
|May 16, 2024
概括
我们开发了智能纳米颗粒,可以在酸性环境中启动它们的抗微生物特性,如感染中发现的,同时在中性条件下保持不活跃,以保护健康细胞. 这种仿生方法为传统抗生素提供了一个有希望的替代方案.
科学领域:
- 生物材料科学 生物材料科学
- 抗微生物聚合物 抗微生物聚合物
- 纳米技术纳米技术
背景情况:
- 阴离子聚合物为抗生素提供了替代品,抗药性发展减少.
- 然而,它们对健康细胞的固有毒性限制了临床应用.
- 一个关键的挑战是平衡抗微生物药物的有效性与生物相容性.
研究的目的:
- 开发一种精确的切换策略,以生物模拟电压离离子通道为灵感,用于离子抗微生物聚合物.
- 通过蛋白质构成过渡来实现抗微生物功能的受控激活和抑制.
- 创建具有增强生物相容性和减少耐药性发展的智能抗菌材料.
主要方法:
- 热力学研究的曼诺-乳酸蛋白相互作用之间的聚和康卡纳瓦林A (ConA).
- 合成的ConA-聚合纳米粒子.
- 在中性和轻微酸性环境中研究纳米粒子行为和抗菌活性.
主要成果:
- 在中性条件下 (由ConAβ薄膜屏蔽的离子体) 抑制了ConA聚合纳米颗粒,显示出高生物相容性.
- 在轻度酸性环境中,ConA构成过渡暴露了,激活了强大的抗菌活性 (32-256倍降低最小杀菌度).
- 在小鼠肺部感染模型中,静脉注射在12小时内使细菌数量减少了4-log.
结论:
- 生物模拟设计通过蛋白质二次结构改变调节阴离子抗微生物功能,为智能抗微生物材料提供了一个有前途的战略.
- 这种方法显著减缓了细菌耐药性的发展.
- 智能切换机制提高了生物相容性和治疗潜力.
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