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Telomeres and telomerase in heart regeneration

机译:心脏再生中的端粒和端粒酶

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摘要

Although recent advances have overturned the old view of the human heart as an inert postmitotic organ, it is clear that the adult heart's capacity to regenerate after an ischemic episode is very limited. Unlike humans, zebrafish and other lower vertebrates vigorously regenerate damaged myocardium after cardiac injury. Understanding how the zebrafish is able to conserve life-long cardiac regeneration capacity while mammals lose it soon after birth is crucial for the development of new treatments for myocardial infarction. Mammals and lower vertebrates differ markedly in their rates of cardiomyocyte proliferation and levels of telomerase activity. Here, we review recent discoveries identifying lack of telomerase activity and concomitant telomere dysfunction as natural barriers to cardiomyocyte proliferation and cardiac regeneration.
机译:尽管最近的进展推翻了旧的观点,即人类心脏是一个惰性的有丝分裂后器官,但很明显,成人心脏在缺血发作后的再生能力非常有限。与人类不同的是,斑马鱼和其他低等脊椎动物在心脏损伤后会大力再生受损的心肌。了解斑马鱼如何在哺乳动物出生后不久就失去心脏再生能力的情况下保持终生心脏再生能力,对于开发心肌梗死的新疗法至关重要。哺乳动物和低等脊椎动物的心肌细胞增殖率和端粒酶活性水平明显不同。在这里,我们回顾了最近的发现,发现缺乏端粒酶活性和伴随的端粒功能障碍是心肌细胞增殖和心脏再生的天然障碍。

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