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首页> 外文期刊>Canadian Journal of Physiology and Pharmacology >Immunofluorescence revealed the presence of NHE-1 in the nuclear membranes of rat cardiomyocytes and isolated nuclei of human, rabbit, and rat aortic and liver tissues.
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Immunofluorescence revealed the presence of NHE-1 in the nuclear membranes of rat cardiomyocytes and isolated nuclei of human, rabbit, and rat aortic and liver tissues.

机译:免疫荧光显示在大鼠心肌细胞的核膜以及人,兔,大鼠主动脉和肝脏组织的分离核中存在NHE-1。

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Using immunofluorescence and 3-dimensional confocal microscopy techniques, the present study was designed to verify if NHE-1 is present at the level of the nuclear membrane in cells that are known to express this type of exchanger. Nuclei were isolated from aortic tissues of adult human, rabbit, and rats, as well as from liver tissues of human fetus, and adult rabbit and rat. In addition, cultured ventricular cardiomyocytes were isolated from 2-week-old rat. Our results showed the presence of NHE-1 in isolated nuclei of aortic vascular smooth muscle and liver of human, rabbit, and rat. NHE-1 seems to be distributed throughout the isolated nucleus and more particularly at the level of the nuclear membranes. The relative fluorescence density of NHE-1 was significantly higher (p < 0.05) in isolated liver nuclei of human, when compared with those of rabbit and rat. However, in isolated nuclei of aortic vascular smooth muscle, the relative fluorescence density of NHE-1 was significantly (p < 0.001) higher in the rabbit when compared with human and rat. In cultured rat ventricular cardiomyocytes, NHE-1 fluorescent labeling could be easily seen throughout the cell, including the nucleus, and more particularly at both the sarcolemma and the nuclear membranes. In rat cardiomyocytes, the relative fluorescence density of NHE-1 of the sarcolemma membrane, including the cytosol, was significantly lower than that of the whole nucleus (including the nuclear envelope membranes). In conclusion, our results showed that NHE-1 is present at the nuclear membranes and in the nucleoplasm and its distribution and density may depend on cell type and species used. These results suggest that nuclear membranes' NHE-1 may play a role in the modulation of intranuclear pH.
机译:使用免疫荧光和3维共聚焦显微镜技术,本研究旨在验证NHE-1是否存在于已知表达这种类型交换子的细胞的核膜水平上。从成年人,兔和大鼠的主动脉组织,以及人胎儿,成年兔和大鼠的肝组织中分离出细胞核。另外,从2周龄的大鼠中分离出培养的心室心肌细胞。我们的结果表明,人,兔和大鼠的主动脉血管平滑肌和肝脏的分离核中存在NHE-1。 NHE-1似乎分布在整个分离的核中,尤其是在核膜水平上。与兔和大鼠相比,人离体肝核中NHE-1的相对荧光密度显着更高(p <0.05)。然而,在主动脉血管平滑肌的分离核中,与人和大鼠相比,兔中NHE-1的相对荧光密度显着更高(p <0.001)。在培养的大鼠心室心肌细胞中,可以很容易地在整个细胞中看到NHE-1荧光标记,包括细胞核,尤其是在肌膜和核膜上。在大鼠心肌细胞中,包括细胞质在内的肌膜膜NHE-1的相对荧光密度显着低于整个细胞核(包括核被膜)。总之,我们的结果表明NHE-1存在于核膜和核质中,其分布和密度可能取决于所用细胞的类型和种类。这些结果表明,核膜的NHE-1可能在核内pH的调节中起作用。

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