提高聚氨的生物相容性 应用在医学中使用氧等离子体及其对增加细菌粘附的负面影响
Kamil Drożdż1, Monika Gołda-Cępa2, Paulina Chytrosz-Wróbel2
1Department of Molecular Medical Microbiology, Chair of Microbiology, Faculty of Medicine, Jagiellonian University Medical College, Krakow 31-121, Poland.
International journal of biomaterials
|March 4, 2024
概括
氧气等离子治疗增加了聚氨 (PU) 的水友性,改变了细胞形态,但不改变活力. 然而,这种修改显著增强了细菌的粘附性,突出显示了表面特性在生物材料设计中的关键作用.
科学领域:
- 生物材料科学 生物材料科学
- 聚合物化学 聚合物化学
- 表面科学是一门学科.
背景情况:
- 聚氨 (PU) 由于其灵活性和耐疲劳性,是重要的医疗聚合物,用于导管和血管等设备.
- 表面湿透性显著影响生物材料的生物相容性和细菌粘附性.
- 氧气等离子处理通过引入含有氧的功能组,有效地改变PU表面,从而改变湿度.
研究的目的:
- 研究氧气等离子体修饰对聚氨与肺细胞生物相容性的影响 (A549).
- 评估氧气等离子体修饰对格朗阳性细菌粘附 (S. aureus,S. epidermidis) 的影响.
主要方法:
- 使用氧等离子体对聚氨表面进行修改.
- 使用接触角测量和原子力显微镜 (AFM) 进行表面表征.
- 生物相容性评估与A549细胞和细菌粘附研究.
主要成果:
- 氧气血治疗引入含氧基 (-OH, -COOH),增加PU的水友性 (接触角从105°降低到9°).
- 飞行机组发现了表面地形的显著变化 (最大高度从~110.3nm减少到~32.1nm).
- 修改后的PU显示了A549细胞形态的改变 (增加面积,长度,减少圆形),而不会影响细胞活力,但显著增加了S. aureus和S. epidermidis粘附.
结论:
- 表面的水友性是影响医疗生物材料生物相容性和细菌粘附的关键因素.
- 氧气等离子体修饰提供了一种调整PU表面特性的方法,影响细胞相互作用和细菌殖民.
- 需要进一步的研究来平衡所需的生物相容性与受控的细菌粘附,以改善医疗器械设计.
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