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Article Open Access

Sanggenon C protects against cardiomyocyte hypoxia injury by increasing autophagy

  • Authors:
    • Yang Gu
    • Lu Gao
    • Yu Chen
    • Zhuo Xu
    • Kun Yu
    • Dongying Zhang
    • Gang Zhang
    • Xiwen Zhang
  • View Affiliations / Copyright

    Affiliations: Department of Cardiology, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, Jiangsu 223300, P.R. China, Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China
    Copyright: © Gu et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 8130-8136
    |
    Published online on: September 27, 2017
       https://doi.org/10.3892/mmr.2017.7646
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Abstract

Sanggenon C is isolated from Morus alba, a plant that has been used for anti‑inflammatory purposes in Oriental medicine. Little is known about the effect of Sanggenon C on cardiomyocyte hypoxia injury. This study, using H9c2 rat cardiomyoblasts, was designed to determine the effects of Sanggenon C on cardiomyocyte hypoxia injury. Inflammatory cytokine levels were measured by reverse transcription‑polymerase chain reaction, reactive oxygen species were measured by 2',7'‑dichlorofluorescin diacetate fluorescent probe, autophagy was detected using the LC3II/I ratio and cell apoptosis was detected by TUNEL staining. The molecular mechanisms underlying Sanggenon C‑induced cyto‑protection were also determined by western blotting, especially the possible involvement of autophagy and AMP‑activated protein kinase (AMPK). Results indicated that samples pretreated with different concentrations of Sanggenon C (1, 10 and 100 µM) reduced the expression levels of pro‑inflammatory cytokines, including tumor necrosis factor α, interleukin (IL)‑1 and IL‑6, under hypoxia. The beneficial effects of Sanggenon C were also associated with reduced levels of reactive oxygen species generation and increased levels of antioxidant nitric oxide and superoxide dismutase. Sanggenon C enhanced hypoxia‑induced autophagy as evidenced by the increased expression levels of autophagy‑associated proteins Beclin and autophagy related 5 as well as the decreased the accumulation of p62, and increased the LC3II/I ratio. Sanggenon C also reduced hypoxia‑induced apoptosis as detected by TUNEL staining and the expression of Bcl‑2 proteins. The beneficial effects of Sanggenon C were associated with enhanced activation level of AMPKα and suppressed hypoxia‑induced mechanistic target of rapamycin (mTOR) and forkhead box O3a (FOXO3a) phosphorylation. The AMPK inhibitor Compound C (CpC) was used, and the anti‑apoptotic and pro‑autophagy effects of Sanggenon C in response to hypoxia were abolished by CpC. In conclusion, the current study demonstrated that Sanggenon C possessed direct cytoprotective effects against hypoxia injury in cardiac cells via signaling mechanisms involving the activation of AMPK and concomitant inhibition of mTOR and FOXO3a.
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Copy and paste a formatted citation
Spandidos Publications style
Gu Y, Gao L, Chen Y, Xu Z, Yu K, Zhang D, Zhang G and Zhang X: Sanggenon C protects against cardiomyocyte hypoxia injury by increasing autophagy. Mol Med Rep 16: 8130-8136, 2017.
APA
Gu, Y., Gao, L., Chen, Y., Xu, Z., Yu, K., Zhang, D. ... Zhang, X. (2017). Sanggenon C protects against cardiomyocyte hypoxia injury by increasing autophagy. Molecular Medicine Reports, 16, 8130-8136. https://doi.org/10.3892/mmr.2017.7646
MLA
Gu, Y., Gao, L., Chen, Y., Xu, Z., Yu, K., Zhang, D., Zhang, G., Zhang, X."Sanggenon C protects against cardiomyocyte hypoxia injury by increasing autophagy". Molecular Medicine Reports 16.6 (2017): 8130-8136.
Chicago
Gu, Y., Gao, L., Chen, Y., Xu, Z., Yu, K., Zhang, D., Zhang, G., Zhang, X."Sanggenon C protects against cardiomyocyte hypoxia injury by increasing autophagy". Molecular Medicine Reports 16, no. 6 (2017): 8130-8136. https://doi.org/10.3892/mmr.2017.7646
Copy and paste a formatted citation
x
Spandidos Publications style
Gu Y, Gao L, Chen Y, Xu Z, Yu K, Zhang D, Zhang G and Zhang X: Sanggenon C protects against cardiomyocyte hypoxia injury by increasing autophagy. Mol Med Rep 16: 8130-8136, 2017.
APA
Gu, Y., Gao, L., Chen, Y., Xu, Z., Yu, K., Zhang, D. ... Zhang, X. (2017). Sanggenon C protects against cardiomyocyte hypoxia injury by increasing autophagy. Molecular Medicine Reports, 16, 8130-8136. https://doi.org/10.3892/mmr.2017.7646
MLA
Gu, Y., Gao, L., Chen, Y., Xu, Z., Yu, K., Zhang, D., Zhang, G., Zhang, X."Sanggenon C protects against cardiomyocyte hypoxia injury by increasing autophagy". Molecular Medicine Reports 16.6 (2017): 8130-8136.
Chicago
Gu, Y., Gao, L., Chen, Y., Xu, Z., Yu, K., Zhang, D., Zhang, G., Zhang, X."Sanggenon C protects against cardiomyocyte hypoxia injury by increasing autophagy". Molecular Medicine Reports 16, no. 6 (2017): 8130-8136. https://doi.org/10.3892/mmr.2017.7646
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