植入物金属局部腐蚀和巨细胞炎症反应的相互作用途径
Meng Li1, Jing Wu1, Wenbo Geng1
1Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, 400044, PR China.
Bioactive materials
|September 4, 2023
概括
316L不钢植入物的局部腐蚀被巨细胞恶化. 这种相互作用加速腐蚀和炎症,影响植入物性能和患者健康.
科学领域:
- 生物材料科学 生物材料科学
- 免疫学 免疫学 免疫学
- 腐蚀工程 腐蚀工程
背景情况:
- 巨细胞是关键的免疫细胞,参与植入周围炎症.
- 金属植入物,如316L不钢,可以经历局部腐蚀.
- 腐蚀产品和免疫细胞之间的相互作用对于植入成功至关重要.
研究的目的:
- 研究316L不钢的局部腐蚀与巨细胞之间的相互作用途径.
- 了解巨细胞的炎症反应如何影响植入物腐蚀.
- 阐明促进腐蚀和炎症的协同效应.
主要方法:
- 在炎症条件下对316L不钢进行电化学监测.
- 使用RAW264.7巨细胞系,诱导M1亲炎性表型与脂聚糖 (LPS).
- 评估与腐蚀有关的巨细胞活力,形态和炎症标记物表达 (CD86,TNF-α,IL-6).
主要成果:
- 巨细胞的存在通过破坏吸附层来降低了316L SS的蚀耐腐蚀性.
- 支持炎症的M1巨细胞进一步降低了穴位潜力,并在细胞附近开始腐蚀.
- 炎症条件和腐蚀加快了ROS的产生,破坏了周围的巨细胞.
- 腐蚀坑诱导了区域依赖的巨细胞反应,在坑附近的生存能力降低和形态变化.
- 腐蚀刺激了CD86,TNF-α,IL-6和细胞内ROS的巨细胞表达.
- 不均地释放金属离子 (Fe2+,Cr3+,Ni2+) 和表面潜力刺激了炎症反应.
结论:
- 在316L SS局部腐蚀和巨细胞炎症反应之间存在协同反循环.
- 这种相互作用加速腐蚀和炎症,对金属植入物产生负面影响.
- 腐蚀-巨细胞相互作用的直接证据为植入物失败机制提供了洞察力.
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