首页> 外文期刊>Endothelium: Journal of endothelial cell research >Effect of high blood flow on the expression of endothelial constitutive nitric oxide synthase in rats with femoral arteriovenous shunts.
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Effect of high blood flow on the expression of endothelial constitutive nitric oxide synthase in rats with femoral arteriovenous shunts.

机译:高血流量对股动静脉分流大鼠内皮型一氧化氮合酶表达的影响。

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The effect of high blood flow on the expression of endothelial nitric oxide synthase has been investigated in the femoral arteriovenous shunt (AVS) rats created by inserting U-shaped polyurethane tubes in the left femoral arteries and veins. Three days after inserting the femoral AVS, the mean aortic blood flow rate in the abdominal aorta of the AVS rats was about 2.0 times higher than that in the control rats (110.0 +/- 8.4 ml/min vs 52.7 +/- 2.7 ml/min, p < 0.001). The competitive reverse transcriptase-polymerase chain reaction (RT-PCR) data revealed that the mRNA expression level of the endothelial constitutive nitric oxide synthase (ecNOS) was increased in the aortas of the femoral AVS rats compared to that in the control rats. Western blot analysis using a monoclonal antibody against ecNOS revealed that the ecNOS protein levels were markedly increased in the aortas of femoral AVS rats, but ecNOS protein levels in aortas without endothelium were not significantly increased. Inducible nitric oxide synthase (iNOS) protein was not expressed in the aortic tissues with and without endothelium in the control rats. This iNOS expression was not increased by the high blood flow in the femoral AVS rats. These findings suggest that high blood flow could up-regulate the expression levels of ecNOS mRNA and proteins in femoral arteriovenous shunt rats.
机译:在通过在左股动脉和静脉中插入U型聚氨酯管而产生的股动静脉分流(AVS)大鼠中,已经研究了高血流量对内皮型一氧化氮合酶表达的影响。股骨AVS插入三天后,AVS大鼠腹主动脉的平均主动脉血流速度是对照组的2.0倍(110.0 +/- 8.4 ml / min对52.7 +/- 2.7 ml / min ,p <0.001)。竞争性逆转录聚合酶链反应(RT-PCR)数据显示,与对照组相比,股骨AVS大鼠主动脉中内皮型一氧化氮合酶(ecNOS)的mRNA表达水平升高。使用针对ecNOS的单克隆抗体进行的蛋白质印迹分析表明,在股骨AVS大鼠主动脉中ecNOS蛋白水平显着增加,但是在没有内皮的主动脉中ecNOS蛋白水平并未显着增加。诱导型一氧化氮合酶(iNOS)蛋白在有或没有内皮的主动脉组织中均未在对照大鼠中表达。股骨AVS大鼠的高血流没有增加iNOS的表达。这些发现表明高血流量可以上调股动静脉分流大鼠中ecNOS mRNA和蛋白的表达水平。

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