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首页> 外文期刊>Molecular medicine reports >Influence of the availability of iron during hypoxia on the genes associated with apoptotic activity and local iron metabolism in rat H9C2 cardiomyocytes and L6G8C5 skeletal myocytes
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Influence of the availability of iron during hypoxia on the genes associated with apoptotic activity and local iron metabolism in rat H9C2 cardiomyocytes and L6G8C5 skeletal myocytes

机译:缺氧期间铁可用性对大鼠H9C2心肌细胞凋亡活性和局部铁代谢相关的基因的影响及L6G8C5骨细胞

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The differential availability of iron during hypoxia is presumed to affect the functioning of cardiac and skeletal myocytes. Rat H9C2 cardiomyocytes and L6G8C5 myocytes were cultured for 48 h in normoxic or hypoxic conditions at the optimal, reduced or increased iron concentration. The mRNA expression levels of markers of apoptosis [B-cell lymphoma-2 (Bcl2; inhibition) and Bcl-2-activated X protein (Bax; induction)], atrophy (Atrogin), glycolysis (pyruvate kinase 2; PKM2) and iron metabolism [transferrin receptor 1 (TfR1; iron importer), ferroportin 1 (FPN1; iron exporter), ferritin heavy chain (FTH; iron storage protein) and hepcidin (HAMP; iron regulator)] were determined using reverse transcription-quantitative polymerase chain reaction, and cell viability was measured using an tetrazolium reduction assay. Cardiomyocytes and myocytes, when exposed to hypoxia, demonstrated an increased Bax/Bcl-2 gene expression ratio (P 0.6 and P<0.05). In conclusion, during hypoxia iron deficiency impairs the viability of cardiomyocytes and myocytes more severely compared with iron excess. In myocytes, during hypoxia iron may act in a protective manner, since the level of atrophy is decreased in the iron-salt-treated cells.
机译:铁的缺氧时差动可用性被推定为影响心脏和骨骼肌细胞的功能。大鼠H9C2心肌细胞和L6G8C5肌细胞在最佳为在含氧量正常或低氧条件下培养48小时,减少或增加的铁浓度。细胞凋亡的标记物的mRNA的表达水平[B细胞淋巴瘤-2(Bcl2的;抑制)和Bcl2的活化X蛋白(BAX;诱导)],萎缩(Atrogin),糖酵解(丙酮酸激酶2; PKM2)和铁代谢[转铁蛋白受体1(TFR1;铁进口商),膜铁转运蛋白1(FPN1;铁出口),铁蛋白重链(FTH;铁储存蛋白)和铁调素(HAMP;铁调节器)使用逆转录 - 定量聚合酶链式反应测定和细胞存活力使用四唑还原法测定。心肌细胞和肌细胞,当暴露于缺氧,表现出增加的Bax表达/ Bcl-2基因表达比(P 0.6和P <0.05)。总之,心肌细胞和心肌细胞的缺氧缺铁损害生存能力更严重过剩的铁相比。在肌细胞,缺氧时铁可以以保护的方式起作用,因为萎缩的水平在铁 - 盐 - 处理的细胞减少。

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