CD47 deficiency protects cardiomyocytes against hypoxia/reoxygenation injury by rescuing autophagic clearance

  • Authors:
    • Yong Li
    • Kun Zhao
    • Pengyu Zong
    • Heling Fu
    • Yuan Zheng
    • Dan Bao
    • Yuan Yin
    • Qin Chen
    • Lu Lu
    • Youjin Dai
    • Daorong Hou
    • Xiangqing Kong
  • View Affiliations

  • Published online on: April 25, 2019     https://doi.org/10.3892/mmr.2019.10199
  • Pages: 5453-5463
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Abstract

To assess the effect of cluster of differentiation (CD47) downregulation on autophagy in hypoxia/reoxygenation (H/R)‑treated H9c2 cardiomyocytes. H9c2 cells were maintained in normoxic conditions (95% air, 5% CO2, 37˚C) without CD47 antibodies, Si‑CD47 or chloroquine (CQ) treatment; H9c2 cells in the H/R group were subjected to 24 h of hypoxia (1% O2, 94% N2, 5% CO2, 37˚C) followed by 12 h of reoxygenation (95% air, 5% CO2, 37˚C). All assays were controlled, triplicated and repeated on three separately initiated cultures. The biochemical parameters in the medium supernatant were measured to evaluate the oxidative stress in cardiomyocytes. The Annexin V‑fluorescein isothiocyanate assay was used to detect the apoptotic rate in the H9c2 cells. Transmission electron microscope, immunofluorescent staining and western blot analysis were performed to detect the effect of the CD47 antibody on autophagic flux in H/R‑treated H9c2 cardiomyocytes. The cardiomyocytic oxidative stress and apoptotic rate decreased and autophagic clearance increased after CD47 downregulation. H/R triggered cell autophagy, autophagosome accumulation and apoptosis in H9c2 cell lines. However, these effects can be attenuated by CD47 downregulation. This study demonstrates its clinical implications in ischemia/reperfusion injury treatment.
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June-2019
Volume 19 Issue 6

Print ISSN: 1791-2997
Online ISSN:1791-3004

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Spandidos Publications style
Li Y, Zhao K, Zong P, Fu H, Zheng Y, Bao D, Yin Y, Chen Q, Lu L, Dai Y, Dai Y, et al: CD47 deficiency protects cardiomyocytes against hypoxia/reoxygenation injury by rescuing autophagic clearance. Mol Med Rep 19: 5453-5463, 2019.
APA
Li, Y., Zhao, K., Zong, P., Fu, H., Zheng, Y., Bao, D. ... Kong, X. (2019). CD47 deficiency protects cardiomyocytes against hypoxia/reoxygenation injury by rescuing autophagic clearance. Molecular Medicine Reports, 19, 5453-5463. https://doi.org/10.3892/mmr.2019.10199
MLA
Li, Y., Zhao, K., Zong, P., Fu, H., Zheng, Y., Bao, D., Yin, Y., Chen, Q., Lu, L., Dai, Y., Hou, D., Kong, X."CD47 deficiency protects cardiomyocytes against hypoxia/reoxygenation injury by rescuing autophagic clearance". Molecular Medicine Reports 19.6 (2019): 5453-5463.
Chicago
Li, Y., Zhao, K., Zong, P., Fu, H., Zheng, Y., Bao, D., Yin, Y., Chen, Q., Lu, L., Dai, Y., Hou, D., Kong, X."CD47 deficiency protects cardiomyocytes against hypoxia/reoxygenation injury by rescuing autophagic clearance". Molecular Medicine Reports 19, no. 6 (2019): 5453-5463. https://doi.org/10.3892/mmr.2019.10199