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Study of lipoproteins and arterial intima interaction based on arterial endothelial cells real geometrical structure

机译:基于动脉内皮细胞真实几何结构的脂蛋白和动脉内膜相互作用研究

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An original methodology is developed for scanning of the arterial intima morphology using the atomic force microscopy. The probing nanolaboratory NTEGRASpectra (NT-MDT, Russia) was itilized. The pictures of the coronary artery intima topology were obtained with the resolution of 1 nm. The 3D model of the 'endothelial cell surface - low density lipoprotein (LDL)' complex was constructed. Using the ANSYS software, the deformation of LDL particle was found as well as the stress distribution at the moment of the macromolecule and endothelial surface collision. The largest normal and tangential stresses are found in the area of LDL interaction with the surface. These stresses are 2.173 and 0.053 kPa, respectively. It was shown that the LDL structure is being highly strained, which leads to the molecule compression and crease. Therefore, one can conclude that at the moment of LDL entering the intercellular hiatus the macromolecule will be suffering the overall deformations and large modification of its structure.
机译:使用原子力显微镜显微镜开发了用于扫描动脉内膜形态的原始方法。沉淀探测纳米制造NTEgraspectra(NT-MDT,俄罗斯)。冠状动脉内膜拓扑的图片以1nm的分辨率获得。构建了“内皮细胞表面 - 低密度脂蛋白(LDL)”复合物的3D模型。使用ANSYS软件,发现LDL颗粒的变形以及大分子和内皮表面碰撞时的应力分布。在与表面的LDL相互作用面积中发现了最大的正常和切向应力。这些应力分别为2.173和0.053kPa。结果表明,LDL结构是高度应变的,这导致分子压缩和折痕。因此,可以得出结论,在进入细胞间的时刻,大分子将遭受整体变形和其结构的大改析。

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