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Tupistra chinensis Baker (STCB), a traditional Chinese medicine, effectively inhibits hepatic carcinoma (HCC) cell growth by suppressing Ras signaling and promoting autophagy. This natural compound shows promise for HCC treatment.

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Area of Science:

  • Traditional Chinese Medicine
  • Oncology
  • Molecular Biology

Background:

  • Traditional Chinese Medicine (TCM) plays a growing role in cancer therapy.
  • Tupistra chinensis Baker (STCB), a Lily family plant, possesses antipyretic and detoxifying properties.
  • Previous research indicates STCB saponins inhibit hepatic carcinoma (HCC) cell proliferation.

Purpose of the Study:

  • To investigate the mechanisms by which STCB regulates HCC progression.
  • To evaluate the anti-cancer effects of STCB on HepG2 cells.

Main Methods:

  • Cell Counting Kit-8 assay for in vitro proliferation assessment.
  • Western blot, immunohistochemistry, and immunofluorescence for protein analysis (Ras signaling and autophagy markers).
  • Mouse xenograft models to assess in vivo anti-tumor efficacy.

Main Results:

  • STCB significantly inhibited HepG2 cell proliferation in vitro, comparable to Salirasib.
  • Combination of STCB and Salirasib enhanced HepG2 cell growth inhibition.
  • STCB suppressed Ras signaling pathway proteins (expression and phosphorylation).
  • STCB treatment upregulated autophagy-related proteins.
  • In vivo, STCB impeded tumor growth in mouse xenograft models and inhibited Ras signaling.

Conclusions:

  • STCB demonstrates significant inhibitory effects on HepG2 cell proliferation.
  • Mechanism involves downregulation of Ras signaling-related proteins.
  • STCB induces autophagy, contributing to its anti-cancer effects.