Journal of Microbiology and Biotechnology

  • 제27권3호
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  • Pages.584-590
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  • 2017
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  • 1017-7825(pISSN)
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  • 1738-8872(eISSN)
한국미생물·생명공학회 (The Korean Society for Microbiology and Biotechnology)
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EGb 761 Protects Cardiac Microvascular Endothelial Cells against Hypoxia/Reoxygenation Injury and Exerts Inhibitory Effect on the ATM Pathway

  • Zhang, Chao (Department of Cardiovascular Surgery, Nanyang Affiliated Hospital of Zhengzhou University, Nanyang Central Hospital) ;
  • Wang, Deng-Feng (Department of Cardiovascular Surgery, Nanyang Affiliated Hospital of Zhengzhou University, Nanyang Central Hospital) ;
  • Zhang, Zhuang (Department of Cardiovascular Surgery, Nanyang Affiliated Hospital of Zhengzhou University, Nanyang Central Hospital) ;
  • Han, Dong (Department of Cardiovascular Surgery, Nanyang Affiliated Hospital of Zhengzhou University, Nanyang Central Hospital) ;
  • Yang, Kan (Department of Cardiovascular Surgery, Nanyang Affiliated Hospital of Zhengzhou University, Nanyang Central Hospital)
  • 투고 : 2016.11.08
  • 심사 : 2016.12.08
  • 발행 : 2017.03.28
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초록

Ginkgo biloba extract (EGb 761) has been widely used clinically to reduce myocardial ischemia reperfusion injury (MIRI). Microvascular endothelial cells (MVECs) may be a proper cellular model in vitro for the effect and mechanism study against MIRI. However, the protective effect of EGb 761 on MVECs resisting hypoxia/reoxygenation (H/R) injury is little reported. In this study, H/R-injured MVECs were treated with EGb 761, and then the cell viability, apoptosis, ROS production, SOD activity, caspase-3 activity, and protein level of ATM, ${\gamma}$-H2AX, p53, and Bax were measured. ATM siRNA was transfected to study the changes of protein in the ATM pathway. EGb 761 presented protective effect on H/R-injured MVECs, with decreasing cell death, apoptosis, and ROS, and elevated SOD activity. Next, EGb 761 could inhibit H/R-induced ATM, ${\gamma}$-H2AX, p53, and Bax in a dose-dependent manner. Moreover, ATM siRNA also could inhibit H/R-induced ATM, ${\gamma}$-H2AX, p53, and Bax. Overall, these findings verify that EGb 761 protects cardiac MVECs from H/R injury, and for the first time, illustrate the influence on the ATM pathway and apoptosis by EGb 761 via dampening ROS.

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