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Nox4-dependent ROS modulation by amino endoperoxides to induce apoptosis in cancer cells

P Zhu1, B M K Tong, R Wang

  • 1School of Biological Sciences, Nanyang Technological University, Singapore, Singapore.

Cell Death & Disease
|March 23, 2013
PubMed

Insights

Novel amino endoperoxides selectively induce apoptosis in metastatic breast cancer cells. This new class of compounds, like 4-Me, targets cancer cells via redox mechanisms, offering a promising strategy against tumor metastasis.

Area of Science:

  • Organic Chemistry
  • Cancer Biology
  • Pharmacology

Background:

  • Tumor metastasis is a primary cause of cancer mortality.
  • Anoikis resistance in cancer cells hinders current treatments.
  • Endoperoxide compounds show anticancer potential but face challenges in clinical application.

Purpose of the Study:

  • To develop stable, selectively cytotoxic amino endoperoxides.
  • To investigate the anticancer mechanisms of novel endoperoxides.
  • To evaluate the efficacy of these compounds against breast cancer metastasis.

Main Methods:

  • One-pot synthesis of amino endoperoxides and derivatives.
  • In vitro apoptosis assays on cancer and normal breast cells.
  • Mechanistic studies involving Nox4 expression and reactive oxygen species (ROS) levels.
  • In vivo studies using orthotopic breast tumor models.

Main Results:

  • Successfully synthesized novel amino endoperoxides with good yield and stability.
  • Identified 4 out of 14 compounds that selectively induce apoptosis in metastatic breast cancer cells.
  • The potent compound 4-Me demonstrated selectivity for Nox4-high cancer cells.
  • 4-Me reduced the O2(-):H2O2 ratio and increased ·OH levels, impairing tumor growth and metastasis in vivo.

Conclusions:

  • Novel amino endoperoxides can be synthesized efficiently and exhibit selective anticancer activity.
  • Redox-based apoptosis induction targeting Nox4 is a viable strategy for combating metastatic breast cancer.
  • These findings support the clinical potential of endoperoxide-based anticancer therapies.

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