Zn-ZnO核心外纳米颗粒对抗菌机制和免疫细胞激活的影响
Luísa Fialho1, Augusto Costa-Barbosa2, Paula Sampaio2
1CEMMPRE, Departamento de Engenharia Mecânica, Universidade de Coimbra, 3030-788 Coimbra, Portugal.
概括
在氧化物表面上的-氧化物纳米颗粒抑制了Candida albicans的生长,而不会引起炎症. 优化的纳米粒子大小和数量是有效的抗微生物活性和生物相容性的关键.
科学领域:
- 生物材料科学 生物材料科学
- 纳米技术 纳米技术
- 表面化学 表面化学
背景情况:
- 氧化物 (Ta2O5) 的多孔表面正在探索生物医学应用.
- 在不诱导炎症反应的情况下增强生物材料的抗微生物特性至关重要.
- 氧化-纳米颗粒 (Zn-ZnO NPs) 提供了潜在的抗菌益处.
研究的目的:
- 为了研究Zn-ZnONP在多孔Ta2O5表面的沉积,以增强抗菌活性.
- 评估NP大小,数量和碳层对表面特性和生物反应的影响.
- 为了确定有效的真菌抑制和最小的细胞毒性,Zn度的值.
主要方法:
- 使用直流磁力喷射,将Zn-ZnONP和碳层沉积在多孔的Ta2O5表面上.
- 表面表征包括评估孔隙性,疏水性和粗性.
- 对Candida albicans进行了抗菌活性测试,并使用巨细胞评估了细胞毒性/炎症反应.
主要成果:
- Zn-ZnO NP沉积降低了孔隙性,增加了疏水性,减少了粗性.
- 开发的表面表现出对C. albicans的真菌学行为,在较高的Zn NP度和较大的NP尺寸下更有效.
- 增加的 Zn NP 度导致了更高的活性氧物种 (ROS) 生成和C. albicans. 膜损伤.
- 细胞毒性和巨细胞中TNF-α的产生依赖于Zn剂量,在大多数修饰的表面上观察到最小的炎症反应.
结论:
- 在Ta2O5表面上的Zn-ZnONP可以有效地抑制真菌生长,而不会引起显著的炎症反应.
- 用Zn-ZnONP进行表面修饰为开发抗微生物生物材料提供了一个有前途的战略.
- 了解Zn度值对于平衡临床应用中的抗微生物疗效与生物相容性至关重要.
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