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首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >Magnesium used in bioabsorbable stents controls smooth muscle cell proliferation and stimulates endothelial cells in vitro.
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Magnesium used in bioabsorbable stents controls smooth muscle cell proliferation and stimulates endothelial cells in vitro.

机译:生物可吸收支架中使用的镁可控制平滑肌细胞增殖并在体外刺激内皮细胞。

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摘要

Magnesium-based bioabsorbable cardiovascular stents have been developed to overcome limitations of permanent metallic stents, such as late stent thrombosis. During stent degradation, endothelial and smooth muscle cells will be exposed to locally high magnesium concentrations with yet unknown physiological consequences. Here, we investigated the effects of elevated magnesium concentrations on human coronary artery endothelial and smooth muscle cell (HCAEC, HCASMC) growth and gene expression. In the course of 24 h after incubation with magnesium chloride solutions (1 or 10 mM) intracellular magnesium level in HCASMC raised from 0.55 +/- 0.25 mM (1 mM) to 1.38 +/- 0.95 mM (10 mM), while no increase was detected in HCAEC. Accordingly, a DNA microarray-based study identified 69 magnesium regulated transcripts in HCAEC, but 2172 magnesium regulated transcripts in HCASMC. Notably, a significant regulation of various growth factors and extracellular matrix components was observed. In contrast, viability and proliferation of HCAEC were increased at concentrations of up to 25 mM magnesium chloride, while in HCASMC viability and proliferation appeared to be unaffected. Taken together, our data indicate that magnesium halts smooth muscle cell proliferation and stimulates endothelial cell proliferation, which might translate into a beneficial effect in the setting of stent associated vascular injury.
机译:已经开发了基于镁的生物可吸收心血管支架,以克服永久性金属支架的局限性,例如晚期支架血栓形成。在支架降解期间,内皮细胞和平滑肌细胞将暴露于局部高浓度的镁中,其生理后果尚未知。在这里,我们研究了镁浓度升高对人冠状动脉内皮和平滑肌细胞(HCAEC,HCASMC)生长和基因表达的影响。与氯化镁溶液(1或10 mM)孵育后24小时内,HCASMC中的细胞内镁水平从0.55 +/- 0.25 mM(1 mM)升高到1.38 +/- 0.95 mM(10 mM),而没有增加在HCAEC中被检测到。因此,一项基于DNA芯片的研究在HCAEC中鉴定出69个镁调控的转录本,而在HCASMC中鉴定了2172个镁调控的转录本。值得注意的是,观察到各种生长因子和细胞外基质成分的显着调节。相反,在高达25 mM的氯化镁浓度下,HCAEC的活力和增殖增加,而在HCASMC中,活力和增殖似乎并未受到影响。综上所述,我们的数据表明镁可阻止平滑肌细胞增生并刺激内皮细胞增生,这可能会转化为支架相关血管损伤的有益作用。

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