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Detection of Mitochondria Membrane Potential to Study CLIC4 Knockdown-induced HN4 Cell Apoptosis In Vitro
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Shikonin induces ROS-based mitochondria-mediated apoptosis in colon cancer

Wenquan Liang1,2, Jianxin Cui1,2, Kecheng Zhang1,2

  • 1Department of General Surgery, Chinese People's Liberation Army General Hospital, Beijing 100853, China.

Oncotarget
|January 10, 2018
PubMed

Insights

Shikonin, a natural compound, effectively inhibits colon cancer growth by inducing apoptosis through reactive oxygen species (ROS) and mitochondrial pathways. It shows promise as a safe and effective colon cancer therapeutic agent.

Area of Science:

  • Oncology
  • Pharmacology
  • Molecular Biology

Background:

  • Colon cancer is a leading global malignancy with significant recurrence rates due to chemotherapy resistance.
  • Novel therapeutic strategies with improved efficacy and safety are critically needed for colon cancer treatment.
  • Shikonin, a naphthoquinone from *Lithospermum erythrorhizon*, exhibits potent anti-tumor properties.

Purpose of the Study:

  • To investigate the anti-tumor mechanisms of shikonin in colon cancer.
  • To evaluate the efficacy and safety of shikonin as a potential colon cancer therapeutic.

Main Methods:

  • In vitro and in vivo studies on colon cancer cell lines and xenograft models.
  • Analysis of shikonin's effects on cell growth, apoptosis, reactive oxygen species (ROS) generation, and mitochondrial function.
  • Assessment of Bcl-2 family protein expression, mitochondrial membrane potential, and caspase cascade activation.

Main Results:

  • Shikonin suppressed colon cancer cell proliferation dose-dependently.
  • Shikonin induced mitochondria-mediated apoptosis via ROS generation and Bcl-2 family protein regulation.
  • Key events included ROS increase, Bcl-2/Bcl-xL downregulation, mitochondrial membrane potential depolarization, and caspase activation.
  • Shikonin demonstrated minimal toxicity to normal colon cells and no liver injury in vivo.

Conclusions:

  • Shikonin effectively induces apoptosis in colon cancer cells through ROS-mediated mitochondrial pathways.
  • Shikonin exhibits a favorable safety profile, with low toxicity to non-cancerous cells and organs.
  • Shikonin represents a promising novel therapeutic candidate for human colon cancer treatment.
Keywords:
ROSapoptosiscolon cancermitochondriashikonin

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