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The effect of a thermal renal denervation cycle on the mechanical properties of the arterial wall

机译:热肾去神经循环对动脉壁力学性能的影响

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The aim of this study was to determine the effect that a thermal renal denervation cycle has on the mechanical properties of the arterial wall. Porcine arterial. tissue specimens were tested in three groups: native tissue, decellularized tissue, decellularized with collagen digestion (e.g. elastin only). One arterial specimen was used as an unheated control specimen while another paired specimen was subjected to a thermal cycle of 70 degrees C for 120 s (n=10). The specimens were subjected to tensile loading and a shrinkage analysis. We observed two key results: The mechanical properties associated with the elastin extracellular matrix (ECM) were not affected by the thermal cycle. The effect of the thermal cycle on the collagen (ECM) was significant, in both the native and decellularized groups the thermal cycle caused a statistically significant decrease in stiffness, and failure strength, moreover the native tissue demonstrated a 27% reduction in lumen area post exposure to the thermal cycle. We have demonstrated that a renal denervation thermal cycle can significantly affect the mechanical properties of an arterial wall, and these changes in stiffness and failure strength were associated with alterations to the collagen rather than the elastin extracellular matrix component. (C) 2014 Elsevier Ltd. All rights reserved.
机译:这项研究的目的是确定热肾脏去神经循环对动脉壁力学性能的影响。猪动脉。将组织标本分为三组进行测试:天然组织,脱细胞组织,通过胶原酶消化脱细胞(仅弹性蛋白)。一个动脉样本用作未加热的对照样本,而另一对样本则经受70摄氏度的热循环120 s(n = 10)。对样品进行拉伸载荷和收缩分析。我们观察到两个关键结果:与弹性蛋白细胞外基质(ECM)相关的机械性能不受热循环的影响。热循环对胶原蛋白(ECM)的影响是显着的,在天然和脱细胞组中,热循环均导致刚度和破坏强度的统计学显着降低,此外,天然组织在术后的管腔面积减少了27%暴露在热循环中。我们已经证明,肾去神经支配的热循环可以显着影响动脉壁的机械性能,并且这些刚度和破坏强度的变化与胶原蛋白的改变而不是弹性蛋白细胞外基质成分有关。 (C)2014 Elsevier Ltd.保留所有权利。

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