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Ghrelin stimulates myocyte development

机译:Ghrelin刺激心肌细胞发育

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摘要

Ghrelin, a gastric peptide hormone, may regulate mesenchymal cell development. Here we show that ghrelin promotes myogenesis in vitro in the mouse myoblast cell line C2C12 cells. Cells expressing ghrelin demonstrated a significant increase in the differentiation of premyocytes into myocytes. The mean myogenic index in cells stably expressing ghrelin increased significantly relative to control cells ( 42 +/- 2% vs. 16 +/- 1%, p < 0.05). Western blotting showed that expression of MHC protein was elevated in cells expressing ghrelin compared to control cells. MyoD expression increased after treatment of C2C12 cells with exogenous ghrelin ( 10(-7) M). The stimulatory effect of ghrelin on myogenesis was abolished by either replacement of the third amino acid serine with alanine or deletion of its first nine amino acids. This study demonstrated that ghrelin is a potent stimulator for myogenesis.
机译:Ghrelin是一种胃肽激素,可调节间充质细胞的发育。在这里,我们显示生长素释放肽在小鼠成肌细胞系C2C12细胞中促进肌生成。表达生长素释放肽的细胞证明前肌细胞向肌细胞的分化显着增加。相对于对照细胞,稳定表达生长素释放肽的细胞中的平均肌细胞生成指数显着增加(42 +/- 2%vs. 16 +/- 1%,p <0.05)。蛋白质印迹显示,与对照细胞相比,表达生长素释放肽的细胞中MHC蛋白的表达升高。用外源生长素释放肽(10(-7)M)处理C2C12细胞后,MyoD表达增加。通过用丙氨酸替代第三个氨基酸丝氨酸或删除其前九个氨基酸,消除了生长素释放肽对肌发生的刺激作用。这项研究表明,生长素释放肽是一种有效的肌生成刺激物。

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