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Surface modifications by gas plasma control osteogenic differentiation of MC3T3-E1 cells

机译:气体等离子体的表面修饰控制MC3T3-E1细胞的成骨分化

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摘要

Numerous studies have shown that the physicochemical properties of biomaterials can control cell activity. Cell adhesion, proliferation, differentiation as well as tissue formation in vivo can be tuned by properties such as the porosity, surface micro- and nanoscale topography and chemical composition of biomaterials. This concept is very appealing for tissue engineering since instructive properties in bioactive materials can be more economical and time efficient than traditional strategies of cell pre-differentiation in vitro prior to implantation. The biomaterial surface, which is easy to modify due to its accessibility, may provide the necessary signals to elicit a certain cellular behavior. Here, we used gas plasma technology at atmospheric pressure to modify the physicochemical properties of polylactic acid and analyzed how this influenced pre-osteoblast proliferation and differentiation. Tetramethylsilane and 3-aminopropyl-trimethoxysilane with helium as a carrier gas or a mixture of nitrogen and hydrogen were discharged to polylactic acid discs to create different surface chemical compositions, hydrophobicity and microscale topographies. Such modifications influenced protein adsorption and pre-osteoblast cell adhesion, proliferation and osteogenic differentiation. Furthermore polylactic acid treated with tetramethylsilane enhanced osteogenic differentiation compared to the other surfaces. This promising surface modification could be further explored for potential development of bone graft substitutes.
机译:大量研究表明,生物材料的理化特性可以控制细胞活性。细胞粘附,增殖,分化以及体内的组织形成可以通过诸如孔隙率,表面微观和纳米尺度的形貌以及生物材料的化学组成等特性来调节。该概念对组织工程非常有吸引力,因为生物活性材料中的指导性质比植入前体外细胞预分化的传统策略更为经济和省时。由于其可接近性而易于修改的生物材料表面,可提供引发某些细胞行为的必要信号。在这里,我们使用大气压下的气体等离子体技术来修改聚乳酸的理化性质,并分析了其如何影响成骨前细胞的增殖和分化。将以氦气为载气或氮气和氢气的混合物的四甲基硅烷和3-氨基丙基-三甲氧基硅烷排放到聚乳酸圆盘上,以产生不同的表面化学组成,疏水性和微观形貌。这种修饰影响了蛋白质的吸附和成骨前细胞的粘附,增殖和成骨分化。此外,与其他表面相比,用四甲基硅烷处理的聚乳酸增强了成骨分化。对于骨移植替代物的潜在开发,可以进一步探索这种有前途的表面修饰。

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