Erschienen in:
15.09.2016 | Original Article
A Natural Model of Mouse Cardiac Myocyte Senescence
verfasst von:
Zunzhe Wang, Xing Rong, Bihui Luo, Shanshan Qin, Lili Lu, Xiuli Zhang, Yeying Sun, Qin Hu, Chunxiang Zhang
Erschienen in:
Journal of Cardiovascular Translational Research
|
Ausgabe 5-6/2016
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Abstract
Many cardiac aging studies are performed on mice first and then, due to difficulty in mouse cardiomyocyte culture, applied the rat neonatal cardiomyocytes to further determine the mechanisms in vitro. Now, the technological challenge of mouse cardiomyocyte culture has been overcome and there is an increasing need for the senescence models of mouse cardiomyocytes. In this study, we have demonstrated that the senescence of mouse cardiomyocytes occurred with the extended culture time as shown by the increased β-galactosidase staining, increased p53 expression, decreased telomere activity, shorted telomere length, increased production of ROS, increased cell apoptosis, and impaired mitochondrial ΔΨm. These senescent responses shared similar results in aged mouse heart tissues in vivo. In summary, we have established and characterized a novel senescence model of mouse cardiomyocytes induced by the extended culture time in vitro. The cell model could be useful for the increased cardiac aging studies worldwide.