Vanadium Dioxide Nanocoating Induces Tumor Cell Death through Mitochondrial Electron Transport Chain Interruption

Area of Science:

• Biomaterials Science
• Nanotechnology
• Cancer Biology

Background:

• Implantable biomedical devices require surfaces that can induce tumor cell death upon direct contact with tumor tissues.
• Developing such antitumor features in biomaterials remains a significant challenge in oncology and regenerative medicine.

Purpose of the Study:

• To develop and evaluate an antitumor-cell nanocoating using vanadium dioxide (VO2).
• To investigate the mechanism by which the VO2 nanocoating induces tumor cell death, specifically targeting cholangiocarcinoma cells.

Main Methods:

• Customized reactive magnetron sputtering was employed to prepare the vanadium dioxide (VO2) nanocoating.
• The antitumor-growth capability was assessed using human cholangiocarcinoma cells in vitro.

Main Results:

• The VO2 nanocoating effectively inhibited the growth of cholangiocarcinoma cells.
• The mechanism involved interrupting the mitochondrial electron transport chain, leading to elevated intracellular reactive oxygen species (ROS).
• This resulted in mitochondrial membrane potential collapse and disrupted cell redox homeostasis, causing oxidative damage.

Conclusions:

• The vanadium dioxide (VO2) nanocoating demonstrates significant potential as an antitumor-cell surface for biomedical applications.
• The study provides novel insights into designing biomaterials that induce tumor cell death via mitochondria-targeting mechanisms.