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Autophagy inhibition enhances the inhibitory effects of ursolic acid on lung cancer cells

  • Authors:
    • Min Wang
    • Hong Yu
    • Ran Wu
    • Zhen‑Yin Chen
    • Qian Hu
    • Yan‑Fei Zhang
    • San‑Hui Gao
    • Guang‑Biao Zhou
  • View Affiliations / Copyright

    Affiliations: State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, P.R. China, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, P.R. China, Guizhou University School of Medicine, Guiyang, Guizhou 550025, P.R. China
    Copyright: © Wang et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 1816-1826
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    Published online on: August 28, 2020
       https://doi.org/10.3892/ijmm.2020.4714
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Abstract

The aim of the present study was to identify natural compounds that bear significant anti‑tumor activity. Thus, the effects of 63 small molecules that were isolated from traditional Chinese medicinal herbs on A549 human non‑small cell lung cancer (NSCLC) and MCF‑7 breast cancer cells were examined. It was found that ursolic acid (UA), a natural pentacyclic triterpenoid, exerted significant inhibitory effect on these cells. Further experiments revealed that UA inhibited the proliferation of various lung cancer cells, including the NSCLC cells, H460, H1975, A549, H1299 and H520, the human small cell lung cancer (SCLC) cells, H82 and H446, and murine Lewis lung carcinoma (LLC) cells. UA induced the apoptosis and autophagy of NSCLC cells. The inhibition of the mammalian target of rapamycin (mTOR) signaling pathway, but not the activation of the extracellular signal‑regulated kinase 1/2 (ERK1/2) signaling pathway contributed to the UA‑induced autophagy of NSCLC cells. Moreover, the inhibition of autophagy by chloroquine (CQ) or siRNA for autophagy‑related gene 5 (ATG5) enhanced the UA‑induced inhibition of cell proliferation and promotion of apoptosis, indicating that UA‑induced autophagy is a pro‑survival mechanism in NSCLC cells. On the whole, these findings suggest that combination treatment with autophagy inhibitors may be a novel strategy with which enhance the antitumor activity of UA in lung cancer.
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Copy and paste a formatted citation
Spandidos Publications style
Wang M, Yu H, Wu R, Chen ZY, Hu Q, Zhang YF, Gao SH and Zhou GB: Autophagy inhibition enhances the inhibitory effects of ursolic acid on lung cancer cells. Int J Mol Med 46: 1816-1826, 2020.
APA
Wang, M., Yu, H., Wu, R., Chen, Z., Hu, Q., Zhang, Y. ... Zhou, G. (2020). Autophagy inhibition enhances the inhibitory effects of ursolic acid on lung cancer cells. International Journal of Molecular Medicine, 46, 1816-1826. https://doi.org/10.3892/ijmm.2020.4714
MLA
Wang, M., Yu, H., Wu, R., Chen, Z., Hu, Q., Zhang, Y., Gao, S., Zhou, G."Autophagy inhibition enhances the inhibitory effects of ursolic acid on lung cancer cells". International Journal of Molecular Medicine 46.5 (2020): 1816-1826.
Chicago
Wang, M., Yu, H., Wu, R., Chen, Z., Hu, Q., Zhang, Y., Gao, S., Zhou, G."Autophagy inhibition enhances the inhibitory effects of ursolic acid on lung cancer cells". International Journal of Molecular Medicine 46, no. 5 (2020): 1816-1826. https://doi.org/10.3892/ijmm.2020.4714
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x
Spandidos Publications style
Wang M, Yu H, Wu R, Chen ZY, Hu Q, Zhang YF, Gao SH and Zhou GB: Autophagy inhibition enhances the inhibitory effects of ursolic acid on lung cancer cells. Int J Mol Med 46: 1816-1826, 2020.
APA
Wang, M., Yu, H., Wu, R., Chen, Z., Hu, Q., Zhang, Y. ... Zhou, G. (2020). Autophagy inhibition enhances the inhibitory effects of ursolic acid on lung cancer cells. International Journal of Molecular Medicine, 46, 1816-1826. https://doi.org/10.3892/ijmm.2020.4714
MLA
Wang, M., Yu, H., Wu, R., Chen, Z., Hu, Q., Zhang, Y., Gao, S., Zhou, G."Autophagy inhibition enhances the inhibitory effects of ursolic acid on lung cancer cells". International Journal of Molecular Medicine 46.5 (2020): 1816-1826.
Chicago
Wang, M., Yu, H., Wu, R., Chen, Z., Hu, Q., Zhang, Y., Gao, S., Zhou, G."Autophagy inhibition enhances the inhibitory effects of ursolic acid on lung cancer cells". International Journal of Molecular Medicine 46, no. 5 (2020): 1816-1826. https://doi.org/10.3892/ijmm.2020.4714
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