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首页> 外文期刊>Canadian Journal of Physiology and Pharmacology >Whole-cell and nuclear NADPH oxidases levels and distribution in human endocardial endothelial, vascular smooth muscle, and vascular endothelial cells
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Whole-cell and nuclear NADPH oxidases levels and distribution in human endocardial endothelial, vascular smooth muscle, and vascular endothelial cells

机译:人心内膜内皮,血管平滑肌和血管内皮细胞中全细胞和核NADPH氧化酶的水平和分布

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The results of our study show that whole-cell and nuclear levels of NADPH oxidase-1 (NOX1) are similar in human vascular endothelial cells (hVECs) and smooth muscle cells (hVSMCs), but lower in human endocardial endothelial cells (hEECs). NOX2 levels were higher in hVECs and lower in hVSMCs. NOX3 levels were the same in hVECs and hVSMCs, but lower in hEECs. NOX4 levels were similar in all of the cell types. NOX4 levels were higher in hVECs than in hVSMCs. NOX5 was also present throughout the 3 cell types, including their nuclei, in the following order: hEECs hVSMCs hVECs. The level of basal reactive oxygen species (ROS) was highest in hVECs and lowest in hVSMCs. However, the Ca2+ level was highest in hVSMCs and lowest in hVECs. These findings suggest that all types of NOXs exist in hEECs, hVECs, and hVSMCs, although their density and distribution are cell-type dependent. The density of the different NOXs correlated with the ROS level, but not with the Ca2+ level. In conclusion, NOXs, including NOX3, exist in cardiovascular cells and their nuclei. The nucleus is a major source of ROS generation. The nuclear NOXs may contribute to ROS and Ca2+ homeostasis, which may affect cell remodeling, including the formation of nuclear T-tubules in vascular diseases and aging.
机译:我们的研究结果表明,人血管内皮细胞(hVECs)和平滑肌细胞(hVSMCs)中NADPH氧化酶-1(NOX1)的全细胞和细胞核水平相似,但在人心内膜内皮细胞(hEECs)中较低。 hVEC中的NOX2水平较高,而hVSMC中的NOX2水平较低。 hVEC和hVSMC中的NOX3水平相同,但在hEEC中较低。在所有细胞类型中,NOX4水平均相似。 hVEC中的NOX4水平高于hVSMC。 NOX5也按以下顺序在三种细胞类型(包括其细胞核)中均存在:hEEC> hVSMC> hVEC。在hVEC中,基础活性氧(ROS)水平最高,而在hVSMC中,最低。但是,钙离子水平在hVSMC中最高,而在hVEC中最低。这些发现表明,hEEC,hVEC和hVSMC中存在所有类型的NOX,尽管它们的密度和分布取决于细胞类型。不同NOX的密度与ROS水平相关,但与Ca2 +水平无关。总之,包括NOX3在内的NOX存在于心血管细胞及其细胞核中。核是ROS产生的主要来源。核NOX可能促进ROS和Ca2 +稳态,这可能影响细胞重塑,包括在血管疾病和衰老中形成核T管。

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