硅橡胶膜细胞载体的应力分析及生物相容性
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国家青年自然基金项目(30801168),天津市卫生局自筹项目(2011KZ57)


Stress analysis and biocompatibility research on a cell carrier with silicone rubber membrane
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    摘要:

    目的 报道一种自制的硅橡胶膜细胞载体,通过三维有限元方法计算其表面应变分布情况,并作细胞生物相容性分析,对材料进行全面评价,为细胞的应力刺激实验提供理论依据。方法 将硅橡胶材料制作成0.1 cm厚的透明薄膜,结合硅橡胶材料的泊松比以及弹性模量,应用三维有限元分析软件对数据进行处理,模拟硅橡胶受到牵张应变后产生的形变;通过MTT方法比较细胞在硅橡胶和标准培养板上的生长情况,并采取体外皮下包埋实验验证硅橡胶材料是否具有生物学毒性。结果 在对材料加载0.5%~20%的过程中,有效应变范围集中在硅橡胶膜的中心区域,约占总面积的90%;同时,硅橡胶材料虽然在生物相容性方面与标准培养板存在一定差异,但其本身无生物学毒性。结论 这种自制的硅橡胶细胞载体表面应力分布良好,生物相容性尚可满足细胞培养,但表面需进一步改善,可满足细胞的牵张应变实验。

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    Objective To report a self-developed cell carrier made of silicone rubber membrane, and to calculate the strain distributions on the membrane and analyze biocompatibility of the silicone rubber by three dimensional (3D) finite element method (FEM) so as to make a comprehensive evaluation on this silicon rubber membrane and provide theoretical basis for cellular research under stress stimulation. Methods The silicon rubber was made into a membrane with the thickness of 0.1 cm. Based on elastic modulus and Poisson’s ratio of the silicone rubber membrane, 3D FEM was used to simulate the deformation of the membrane induced by the stretch stress. MTT method was used to compare the growing situation of cells cultured on the silicone membranes and in standard plastic plates, respectively. Embedding experiment was also conducted to find out whether the material had biological toxicity or not. ResultsUnder the loading of 0.5%~20% strain, the area with effective strain was in the center of the membrane, accounting for 90% of the total area. There still existed some differences in biocompatibility between the silicon rubber membrane and standard plastic plate, but the material itself showed no toxicity. Conclusions Stress distributions on the surface of this self-developed silicon rubber membrane and its biocompatibility were generally acceptable for cell culture, but its surface should be further improved to fit for cell stress experiment.

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马信龙,李爽,付鑫,孙晓雷,李秀兰,张杨,郭悦,李稚君.硅橡胶膜细胞载体的应力分析及生物相容性[J].医用生物力学,2011,26(5):426-431

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  • 收稿日期:2011-05-20
  • 最后修改日期:2011-07-26
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