首页> 外文期刊>Journal of vascular research >Interaction between wall shear stress and circumferential strain affects endothelial cell biochemical production.
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Interaction between wall shear stress and circumferential strain affects endothelial cell biochemical production.

机译:壁切应力与周向应变之间的相互作用影响内皮细胞生化产生。

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The wall shear stress (WSS) of flowing blood and the circumferential strain (CS) driven by the pressure pulse interact to impose a dynamic force pattern on endothelial cells (ECs) which can be characterized by the temporal phase angle between WSS and CS, a quantity which varies significantly throughout the circulation. To study the interaction of WSS and CS on endothelial production of vasodilators (prostacyclin and nitric oxide) and a vasoconstrictor (endothelin-1), bovine aortic ECs were cultured on the inner surface of compliant tubes and subjected to various flow conditions: steady shear (10 dyn/cm(2)), oscillatory shear (10 +/- 10 dyn/cm(2), rigid tube), and oscillatory shear (10 +/- 10 dyn/cm(2)) with CS (8%) either in or out of phase with shear. The 4-hour production rates of vasoactive agents show that steady shear stimulates the highest production of vasodilators whereas oscillatory shear stimulates the highest vasoconstrictor production. The addition of CS in concert with oscillatory shear enhances the production of vasodilators and inhibits the production of vasoconstrictors, and this effect is modulated by the phase angle between WSS and CS. These data suggest that the interactions of WSS and CS are important in vascular regulation and remodeling.
机译:流动的血液的壁切应力(WSS)和压力脉冲驱动的圆周应变(CS)相互作用,在内皮细胞(ECs)上施加动态力模式,该模式可以通过WSS和CS之间的时间相角来表征,数量在整个循环中变化很大。为了研究WSS和CS在血管扩张剂(前列环素和一氧化氮)和血管收缩剂(内皮素-1)的内皮生成中的相互作用,在顺应性试管的内表面培养了牛主动脉EC,并对其进行了多种流动条件:稳定剪切( 10 dyn / cm(2)),振荡剪切(10 +/- 10 dyn / cm(2),刚性管)和CS(8%)的振荡剪切(10 +/- 10 dyn / cm(2))与剪切同相或异相。血管活性剂的4小时生产速率表明,稳定的剪切刺激血管扩张剂的最高产量,而振荡的剪切刺激血管收缩剂的最高产量。 CS与振荡剪切的协同作用增加了血管扩张剂的产生,并抑制了血管收缩剂的产生,并且这种影响由WSS和CS之间的相角调节。这些数据表明WSS和CS的相互作用在血管调节和重塑中很重要。

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