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Blocking autophagic flux enhances matrine-induced apoptosis in human hepatoma cells

Li Wang1, Chun Gao, Shukun Yao

  • 1China-Japan Friendship Clinical Medicine College, Peking University Health Science Center, No.2 Yinghua East Road, Beijing 100029, China. yao_sk@163.com.

International Journal of Molecular Sciences
|November 30, 2013
PubMed

Insights

Matrine induces both autophagy and apoptosis in liver cancer cells. Inhibiting autophagy enhances matrine-induced cancer cell death, offering a potential therapeutic strategy for hepatocellular carcinoma (HCC).

Area of Science:

  • Oncology
  • Cell Biology
  • Biochemistry

Background:

  • Autophagy, a cellular self-defense process, is implicated in drug resistance within hepatocellular carcinoma (HCC).
  • Understanding autophagy's role is crucial for developing effective HCC treatments.

Purpose of the Study:

  • To investigate the role of autophagy in matrine-induced apoptosis in hepatoma cells (HepG2 and Bel7402).
  • To elucidate the underlying mechanisms of autophagy and apoptosis triggered by matrine.

Main Methods:

  • Assessed cell apoptosis via flow cytometry and caspase activity assays.
  • Evaluated cell proliferation using MTT and colony formation assays.
  • Analyzed autophagic flux through protein expression (LC3BI/II, p62/SQSTM1), GFP-LC3 transfection, and transmission electron microscopy.
  • Investigated the phosphoinositide 3-kinase/AKT/mTOR pathway and beclin-1 involvement.

Main Results:

  • Matrine treatment induced both autophagy and apoptosis in HCC cells.
  • Inhibition of autophagy, using chloroquine or beclin-1 small-interfering RNA, enhanced matrine-induced apoptosis in a caspase-dependent manner.
  • Autophagy was activated through the inhibition of the PI3K/AKT/mTOR pathway and beclin-1 upregulation.

Conclusions:

  • Autophagy inhibition potentiates matrine-induced apoptosis in human hepatoma cells.
  • Targeting autophagy presents a promising strategy to enhance the efficacy of matrine therapy for HCC.

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