myocardial ckip-1 overexpression protects from simulated microgravity-induced cardiac remodeling
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2018
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Abstract
Human cardiovascular system has adapted to Earth's gravity of 1G. The microgravity during space flight can induce cardiac remodeling and decline of cardiac function. At present, the mechanism of cardiac remodeling induced by microgravity remains to be disclosed. Casein kinase-2 interacting protein-1 (CKIP-1) is an important inhibitor of pressure-overload induced cardiac remodeling by decreasing the phosphorylation level of HDAC4. However, the role of CKIP-1 in the cardiac remodeling induced by microgravity is unknown. The purpose of this study was to determine whether CKIP-1 was also involved in the regulation of cardiac remodeling induced by microgravity. We first detected the expression of CKIP-1 in the heart from mice and monkey after simulated microgravity using Q-PCR and western blotting. Then, myocardial specific CKIP-1 transgenic (TG) and wild type mice were hindlimb-suspended (HU) to simulate microgravity effect. We estimated the cardiac remodeling in morphology and function by histological analysis and echocardiography. Finally, we detected the phosphorylation of AMPK, ERK1/2, and HDAC4 in the heart from wild type and CKIP-1 transgenic mice after HU. The results revealed the reduced expression of CKIP-1 in the heart both from mice and monkey after simulated microgravity. Myocardial CKIP-1 overexpression protected from simulated microgravity-induced decline of cardiac function and loss of left ventricular mass. Histological analysis demonstrated CKIP-1 TG inhibited the decreases in the size of individual cardiomyocytes of mice after hindlimb unloading. CKIP-1 TG can inhibit the activation of HDAC4 and ERK1/2 and the inactivation of AMPK in heart of mice induced by simulated microgravity. These results demonstrated CKIP-1 was a suppressor of cardiac remodeling induced by simulated microgravity.
| Reference Key |
ling2018frontiersmyocardial
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| Authors | ;Shukuan Ling;Yuheng Li;Guohui Zhong;Yongjun Zheng;Qing Xu;Dingsheng Zhao;Weijia Sun;Xiaoyan Jin;Hongxing Li;Jianwei Li;Huiyuan Sun;Dengchao Cao;Jinping Song;Caizhi Liu;Xinxin Yuan;Xiaorui Wu;Yinlong Zhao;Zizhong Liu;Qi Li;Yingxian Li |
| Journal | Journal of clinical and experimental dentistry |
| Year | 2018 |
| DOI |
10.3389/fphys.2018.00040
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| URL | |
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