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The response of fibrinogen, platelets, endothelial and smooth muscle cells to an electrochemically modified SS316LS surface: towards the enhanced biocompatibility of coronary stents.

机译:纤维蛋白原,血小板,内皮和平滑肌细胞对电化学改性的SS316LS表面的反应:朝向冠状动脉支架的增强生物相容性。

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摘要

Modification of a biomedical-grade stainless steel 316LS surface by electrochemical cyclic potentiodynamic passivation (CPP) and the response of fibrinogen (Fg), platelets, endothelial cells (ECs) and smooth muscles cells (SMCs) to this surface was investigated. Polarization modulation infrared reflection absorption spectroscopy revealed a significant difference between the secondary structure of Fg adsorbed on the unmodified and CPP surface, the latter being closer to that of native Fg. This was postulated as the origin of the significantly lower surface density of attached platelets on the CPP surface. The competitive interaction of ECs and SMCs with the surface showed that the ECs/SMCs surface density ratio is significantly higher on the CPP surface over the first 2h of attachment, suggesting faster initial attachment kinetics of ECs on the CPP surface. The presented results thus clearly demonstrate an increase in biocompatibility of the CPP 316LS surface.
机译:研究了通过电化学环状电位动力学钝化(CPP)的生物医学级不锈钢316LS表面和纤维蛋白原(FG),血小板,内皮细胞(ECS)和平滑肌细胞(SMC)对该表面的响应。 偏振调制红外反射吸收光谱揭示了吸附在未修饰和CPP表面上的FG的二级结构之间的显着差异,后者更接近天然FG的FG。 这被假设为CPP表面上附着血小板的显着降低的表面密度的起源。 ECS和SMC与表面的竞争相互作用表明,在附着的前2H上,ECS / SMC表面密度比在CPP表面上显着高,表明CPP表面上的ECS的初始初始附着动力学。 所提出的结果清楚地证明了CPP 316LS表面的生物相容性的增加。

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