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Journal of Chinese Pharmaceutical Sciences ›› 2023, Vol. 32 ›› Issue (11): 881-892.DOI: 10.5246/jcps.2023.11.071

• Original articles • Previous Articles     Next Articles

PI3K/AKT/mTOR pathway inhibition and miR-210-mediated suppression of Atg7 promote autophagy in TOPC-induced apoptosis of H1975 cells

Wuyinxiao Zheng, Haiping Li, Laichun Luo, Chunling Hu, Pengtao You*()   

  1. Hubei Key Laboratory of Resources and Chemistry of Chinese Medicine, Hubei University of Chinese Medicine, Wuhan 430065, Hubei, China
  • Received:2023-04-20 Revised:2023-06-23 Accepted:2023-07-19 Online:2023-12-02 Published:2023-12-02
  • Contact: Pengtao You

Abstract:

TOPC (2-(2,5,5,8a-tetramethyl-3,4,4a,5,6,7,8,8a-octahydronaphthalen-1-yl) ethyl piperazine-1-carbodithioate) is a coleolic acid-dithiocarbamate derivative synthesized by our team. Notably, this compound exhibits superior inhibitory effects on the proliferation of human non-small-cell lung cancer (NSCLC) cell lines A549 and H1975 compared to coleolic acid. The primary objective of this study was to investigate the potential molecular mechanisms of TOPC against H1975 cells. Cell proliferation was assessed using the MTT assay, while apoptosis induced by TOPC was evaluated using Hoechst 33342 staining and Western blotting analysis. The expressions of autophagy proteins and the associated PI3K/AKT/mTOR signaling pathway were determined through Western blotting analysis. The transfection efficiency of the miR-210 mimic, inhibitor, and inhibitor NC, as well as the expressions of miR-210 and Atg7, were assessed using qRT-PCR. TOPC demonstrated significant inhibition of A549 and H1975 cell proliferation. Hoechst 33342 staining and Western blotting analysis revealed that TOPC induced apoptosis in H1975 cells. Moreover, TOPC induced autophagy in H1975 cells, as evidenced by increased expressions of autophagy-related proteins, such as Beclin-1, Atg5, Atg7, Atg12, and LC3-II. Additionally, qRT-PCR demonstrated that TOPC significantly downregulated the expression of miR-210 in H1975 cells. Further investigation suggested that TOPC-induced autophagy was mediated by inhibiting the PI3K/AKT/mTOR signaling pathway and suppressing the function of miR-210 on Atg7. The findings clearly demonstrated that TOPC substantially suppressed the growth of A549 and H1975 cells, making it a promising therapeutic agent for NSCLC. Its potential merits further development.

Key words: TOPC, Apoptosis, Autophagy, PI3K/AKT/mTOR, miR-210

Supporting: