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Short-Duration Swimming Exercise after Myocardial Infarction Attenuates Cardiac Dysfunction and Regulates Mitochondrial Quality Control in Aged Mice
Joint Authors
Zhao, Dajun
Sun, Yang
Tan, Yanzhen
Zhang, Zhengbin
Hou, Zuoxu
Gao, Chao
Feng, Pan
Zhang, Xing
Yi, Wei
Gao, Feng
Source
Oxidative Medicine and Cellular Longevity
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-16, 16 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-04-11
Country of Publication
Egypt
No. of Pages
16
Main Subjects
Abstract EN
Background.
Exercise benefits to cardiac rehabilitation (CR) following stable myocardial infarction (MI).
The suitable exercise duration for aged patients with coronary heart disease (CHD) remains controversial, and the underlying molecular mechanism is still unclear.
Methods and Results.
18-Month-old mice after stable MI were randomly submitted to different durations of exercise, including 15 and 60 min swimming training (ST) once per day, five times a week for 8 weeks.
Compared to sedentary mice, 15 min ST, rather than 60 min ST, significantly augmented left ventricular function, increased survival rate, and suppressed myocardial fibrosis and apoptosis.
15 min ST improved mitochondrial morphology via regulating mitochondrial fission-fusion signaling.
15 min ST regulated mitophagy signaling via inhibiting LC3-II and P62 levels and increasing PINK/Parkin expression.
15 min ST also inhibited ROS production and enhanced antioxidant SOD2 activity.
Notably, 15 min ST significantly increased sirtuin (SIRT) 3 level (2.7-fold) in vivo while the inhibition of SIRT3 exacerbated senescent H9c2 cellular LDH release and ROS production under hypoxia.
In addition, SIRT3 silencing impairs mitochondrial dynamics and mitophagy in senescent cardiomyocytes against simulated ischemia (SI) injury.
Conclusion.
Collectively, our study demonstrated for the first time that sustained short-duration exercise, rather than long-duration exercise, attenuates cardiac dysfunction after MI in aged mice.
It is likely that the positive regulation induced by a short-duration ST regimen on the elevated SIRT3 protein level improved mitochondrial quality control and decreased apoptosis and fibrosis contributed to the observed more resistant phenotype.
American Psychological Association (APA)
Zhao, Dajun& Sun, Yang& Tan, Yanzhen& Zhang, Zhengbin& Hou, Zuoxu& Gao, Chao…[et al.]. 2018. Short-Duration Swimming Exercise after Myocardial Infarction Attenuates Cardiac Dysfunction and Regulates Mitochondrial Quality Control in Aged Mice. Oxidative Medicine and Cellular Longevity،Vol. 2018, no. 2018, pp.1-16.
https://search.emarefa.net/detail/BIM-1211378
Modern Language Association (MLA)
Zhao, Dajun…[et al.]. Short-Duration Swimming Exercise after Myocardial Infarction Attenuates Cardiac Dysfunction and Regulates Mitochondrial Quality Control in Aged Mice. Oxidative Medicine and Cellular Longevity No. 2018 (2018), pp.1-16.
https://search.emarefa.net/detail/BIM-1211378
American Medical Association (AMA)
Zhao, Dajun& Sun, Yang& Tan, Yanzhen& Zhang, Zhengbin& Hou, Zuoxu& Gao, Chao…[et al.]. Short-Duration Swimming Exercise after Myocardial Infarction Attenuates Cardiac Dysfunction and Regulates Mitochondrial Quality Control in Aged Mice. Oxidative Medicine and Cellular Longevity. 2018. Vol. 2018, no. 2018, pp.1-16.
https://search.emarefa.net/detail/BIM-1211378
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1211378