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(-)-Anonaine induces apoptosis through Bax- and caspase-dependent pathways in human cervical cancer (HeLa) cells

Chung-Yi Chen1, Tsan-Zon Liu, Wei-Chang Tseng

  • 1School of Medicine and Health Sciences, Fooyin University, Kaohsiung Hsien 831, Taiwan.

Food and Chemical Toxicology : an International Journal Published for the British Industrial Biological Research Association
|June 6, 2008
PubMed

Insights

(-)-Anonaine triggers apoptosis in human HeLa cancer cells by causing DNA damage and activating caspases. This compound shows potential for cervical cancer chemotherapy and chemoprevention.

Area of Science:

  • Pharmacology
  • Cell Biology
  • Biochemistry

Background:

  • (-)-Anonaine exhibits anticancer properties, but its precise mechanism of action in inducing cancer cell death remains unclear.
  • Understanding the molecular pathways is crucial for developing effective cancer therapies.

Purpose of the Study:

  • To elucidate the mechanisms by which (-)-anonaine induces apoptosis in human HeLa cancer cells.
  • To investigate the role of oxidative stress, mitochondrial dysfunction, and caspase activation in (-)-anonaine-mediated cell death.

Main Methods:

  • HeLa cancer cells were treated with varying doses of (-)-anonaine.
  • Assays were performed to measure DNA damage, intracellular reactive oxygen species (ROS), nitric oxide (NO) levels, glutathione depletion, mitochondrial membrane potential, caspase activity, and protein expression (Bax, p53, PARP cleavage).
  • Madin-Darby canine kidney and Vero cell lines were used as controls to assess cell-type specificity.

Main Results:

  • (-)-Anonaine induced dose-dependent DNA damage, increased intracellular ROS and NO, depleted glutathione, and disrupted mitochondrial membrane potential in HeLa cells.
  • Activation of caspases (3, 7, 8, 9) and poly ADP ribose polymerase (PARP) cleavage were observed.
  • (-)-Anonaine upregulated Bax and p53 protein expression.
  • Apoptosis and Bax expression were inhibited by a broad caspases inhibitor (Boc-Asp(OMe)-fmk).
  • No significant DNA damage was observed in non-cancerous Madin-Darby canine kidney and Vero cell lines.

Conclusions:

  • (-)-Anonaine induces apoptosis in HeLa cervical cancer cells through a mechanism involving DNA damage, oxidative stress, mitochondrial dysfunction, and caspase activation.
  • The observed effects are specific to cancer cells, as non-cancerous kidney cell lines showed no DNA damage.
  • (-)-Anonaine presents potential as a therapeutic agent for cervical cancer chemotherapy or as a chemopreventive agent.

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