首页> 美国卫生研究院文献>Proceedings of the National Academy of Sciences of the United States of America >Enzyme activities in endothelial cells and smooth muscle cells from swine aorta.
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Enzyme activities in endothelial cells and smooth muscle cells from swine aorta.

机译:猪主动脉内皮细胞和平滑肌细胞中的酶活性。

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摘要

In populations of cultured arterial endothelial and smooth muscle cells grown under the same conditions, we have measured the total activity per cell of 10 enzymes commonly used as "markers" for subcellular organelles: NADH: ferricyanide reductase, NADH:cytochrome c reductase (rotenone insensitive). NADPH:cytochrome c reductase, alpha-glucosidase, 5'-nucleotidase, alkaline phosphodiesterase I, cytochrome oxidase, monoamine oxidase, cathepsin D, and N-acetyl-beta-glucosaminidase. Significant differences between the cell types were found for 7 of the 10 enzymes tested. The total activity of 5'-nucleotidase in cultured smooth muscle cells was 17 times that of cultured endothelial cells. Comparison of the activities in the two cell types freshly collected and in culture showed that the difference in 5'-nucleotidase in cultured cells is due principally to loss of activity from endothelial cells, suggesting that this activity is regulated differently in the two cell types. In both cell types cathepsin D activity rose during culture.
机译:在相同条件下培养的动脉内皮细胞和平滑肌细胞群体中,我们测量了通常用作亚细胞细胞器“标记”的10种酶的总细胞活性:NADH:铁氰化物还原酶,NADH:细胞色素C还原酶(鱼藤酮不敏感)。 NADPH:细胞色素c还原酶,α-葡萄糖苷酶,5'-核苷酸酶,碱性磷酸二酯酶I,细胞色素氧化酶,单胺氧化酶,组织蛋白酶D和N-乙酰基-β-氨基葡萄糖苷酶。对于10种酶中的7种,发现细胞类型之间存在显着差异。培养的平滑肌细胞中5'-核苷酸酶的总活性是培养的内皮细胞的17倍。比较新鲜收集和培养的两种细胞类型的活性,发现培养细胞中5'-核苷酸酶的差异主要归因于内皮细胞活性的丧失,这表明在两种细胞类型中该活性受到不同的调节。在两种细胞类型中,组织蛋白酶D的活性在培养过程中均升高。

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