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Article

Inhibition of autophagy enhances cinobufagin‑induced apoptosis in gastric cancer

  • Authors:
    • Xuanxuan Xiong
    • Bo Lu
    • Qingzhong Tian
    • Haiyan Zhang
    • Mingbo Wu
    • Hao Guo
    • Qianjin Zhang
    • Xiangcheng Li
    • Tian Zhou
    • Yun Wang
  • View Affiliations / Copyright

    Affiliations: Department of Gastroenterology 2, Xuzhou City Central Hospital, The Affiliated Hospital of the Southeast University Medical School (Xuzhou), Xuzhou, Jiangsu 221009, P.R. China, Department of Oncological Surgery, Xuzhou City Central Hospital, The Affiliated Hospital of the Southeast University Medical School (Xuzhou), The Tumor Research Institute of Southeast University (Xuzhou), Xuzhou, Jiangsu 221009, P.R. China , Key Laboratory of Living Donor Liver Transplantation, Ministry of Public Health, Department of Liver Transplantation Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
  • Pages: 492-500
    |
    Published online on: October 31, 2018
       https://doi.org/10.3892/or.2018.6837
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Abstract

Cinobufagin is a cardiotoxic bufanolide steroid secreted by the Asiatic toad Bufo gargarizans. Cinobufagin is one of the active ingredients in the anticancer Chinese medicine called Chan Su, which was demonstrated to be an effective treatment for gastric cancer. Increasing evidence shows that inhibition of autophagy has a pro‑apoptotic effect on human gastric cancer cells. The aim of the present study was to investigate the relationship between cinobufagin, autophagy and apoptosis in gastric cancer. Autophagy was induced or inhibited in the human gastric cancer cell line SGC‑7901 by incubation in HBSS media or by treatment with 3‑methyladenine or ATG5 siRNA, respectively. Following treatment, the levels of apoptosis, apoptotic proteins, reactive oxygen species (ROS), and mitochondrial membrane potential were compared between the conditions. As anticipated, we found that cinobufagin increased apoptosis in SGC‑7901 cells. Notably, inhibition of autophagy, monitored by the absence of the autophagosome marker LC3‑II, also enhanced cell apoptosis. This effect was reversed when autophagy was induced by incubation in HBSS media. Enhanced expression of pro‑apoptotic indicators, including BAX, cytosolic cytochrome c, cleaved PARP, caspase‑3 and caspase‑9, was detected when autophagy was suppressed. Increased pro‑apoptotic protein expression was accompanied by disrupted mitochondrial membrane potential and elevated ROS production. Altogether, these data suggest that inhibition of autophagy enhances the anticancer action of cinobufagin through increased apoptosis of gastric cancer cells. Moreover, these effects may be partly mediated by ROS generation and the activation of the mitochondrial programmed cell death pathway.
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Copy and paste a formatted citation
Spandidos Publications style
Xiong X, Lu B, Tian Q, Zhang H, Wu M, Guo H, Zhang Q, Li X, Zhou T, Wang Y, Wang Y, et al: Inhibition of autophagy enhances cinobufagin‑induced apoptosis in gastric cancer. Oncol Rep 41: 492-500, 2019.
APA
Xiong, X., Lu, B., Tian, Q., Zhang, H., Wu, M., Guo, H. ... Wang, Y. (2019). Inhibition of autophagy enhances cinobufagin‑induced apoptosis in gastric cancer. Oncology Reports, 41, 492-500. https://doi.org/10.3892/or.2018.6837
MLA
Xiong, X., Lu, B., Tian, Q., Zhang, H., Wu, M., Guo, H., Zhang, Q., Li, X., Zhou, T., Wang, Y."Inhibition of autophagy enhances cinobufagin‑induced apoptosis in gastric cancer". Oncology Reports 41.1 (2019): 492-500.
Chicago
Xiong, X., Lu, B., Tian, Q., Zhang, H., Wu, M., Guo, H., Zhang, Q., Li, X., Zhou, T., Wang, Y."Inhibition of autophagy enhances cinobufagin‑induced apoptosis in gastric cancer". Oncology Reports 41, no. 1 (2019): 492-500. https://doi.org/10.3892/or.2018.6837
Copy and paste a formatted citation
x
Spandidos Publications style
Xiong X, Lu B, Tian Q, Zhang H, Wu M, Guo H, Zhang Q, Li X, Zhou T, Wang Y, Wang Y, et al: Inhibition of autophagy enhances cinobufagin‑induced apoptosis in gastric cancer. Oncol Rep 41: 492-500, 2019.
APA
Xiong, X., Lu, B., Tian, Q., Zhang, H., Wu, M., Guo, H. ... Wang, Y. (2019). Inhibition of autophagy enhances cinobufagin‑induced apoptosis in gastric cancer. Oncology Reports, 41, 492-500. https://doi.org/10.3892/or.2018.6837
MLA
Xiong, X., Lu, B., Tian, Q., Zhang, H., Wu, M., Guo, H., Zhang, Q., Li, X., Zhou, T., Wang, Y."Inhibition of autophagy enhances cinobufagin‑induced apoptosis in gastric cancer". Oncology Reports 41.1 (2019): 492-500.
Chicago
Xiong, X., Lu, B., Tian, Q., Zhang, H., Wu, M., Guo, H., Zhang, Q., Li, X., Zhou, T., Wang, Y."Inhibition of autophagy enhances cinobufagin‑induced apoptosis in gastric cancer". Oncology Reports 41, no. 1 (2019): 492-500. https://doi.org/10.3892/or.2018.6837
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