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首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >Thermal analysis characterization of aortic tissues for cardiac valve bioprostheses
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Thermal analysis characterization of aortic tissues for cardiac valve bioprostheses

机译:心脏瓣膜生物假体的主动脉组织的热分析表征

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摘要

Two multistep extractions were achieved on porcine aortic tissues to obtain acellular matrices used for cardiac bioprostheses. The evaluation of structural modifications and the possible damage of extracellular matrix fibrous proteins were investigated by means of thermogravimetric analysis (TGA) and differential scanning Calorimetry (DSC). Protein-water interactions and degradation temperatures were determined by TGA. DSC was used to characterize protein thermal transitions (glass transition and denaturation), which provided information on the dynamic structure of the aortic tissue components. Sodium dodecyl sulfate (SDS) extraction had a destructuring effect, while Triton and cholate treatments did not affect the structural integrity of either elastin and collagen. A DSC comparison showed that SDS destabilizes the collage triple helical domain and swells the elastin network.
机译:在猪主动脉组织上进行了两次多步提取,以获得用于心脏生物假体的无细胞基质。通过热重分析(TGA)和差示扫描量热法(DSC)研究了结构修饰的评估以及细胞外基质纤维蛋白的可能破坏。蛋白质-水的相互作用和降解温度由TGA确定。 DSC用于表征蛋白质的热转变(玻璃化转变和变性),从而提供有关主动脉组织成分动态结构的信息。十二烷基硫酸钠(SDS)提取具有破坏作用,而Triton和胆酸盐处理均不影响弹性蛋白和胶原的结构完整性。 DSC比较表明,SDS破坏了拼贴的三重螺旋域并扩大了弹性蛋白网络。

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