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Magneto mitochondrial dysfunction mediated cancer cell death using intracellular magnetic nano-transducers
Wooram Park1, Seok-Jo Kim2, Paul Cheresh3
1Department of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611, USA. dhkim@northwestern.edu and Department of Biomedical-Chemical Engineering, The Catholic University of Korea, 43 Jibong-ro, Wonmi-gu, Bucheon, Gyeonggi 14662, Republic of Korea.
Abstract:
Mitochondria are crucial regulators of the intrinsic pathway of cancer cell death. The high sensitivity of cancer cells to mitochondrial dysfunction offers opportunities for emerging targets in cancer therapy. Herein, magnetic nano-transducers, which convert external magnetic fields into physical stress, are designed to induce mitochondrial dysfunction to remotely kill cancer cells. Spindle-shaped iron oxide nanoparticles were synthesized to maximize cellular internalization and magnetic transduction. The magneto-mechanical transduction of nano-transducers in mitochondria enhances cancer cell apoptosis by promoting a mitochondrial quality control mechanism, referred to as mitophagy. In the liver cancer animal model, nano-transducers are infused into the local liver tumor via the hepatic artery. After treatment with a magnetic field, in vivo mitophagy-mediated cancer cell death was also confirmed by mitophagy markers, mitochondrial DNA damage assay, and TUNEL staining of tissues. This study is expected to contribute to the development of nanoparticle-mediated mitochondria-targeting cancer therapy and biological tools, such as magneto-genetics.
Insights
Magnetic nanoparticles remotely induce cancer cell death by triggering mitochondrial dysfunction and mitophagy. This novel approach offers a promising strategy for targeted cancer therapy, enhancing apoptosis through physical stress.
Area of Science:
- Biomedical Engineering
- Nanotechnology
- Cancer Biology
Background:
- Mitochondria play a key role in cancer cell death pathways.
- Targeting mitochondrial dysfunction presents a therapeutic opportunity for cancer treatment.
Purpose of the Study:
- To design magnetic nano-transducers for remote cancer cell killing.
- To investigate the induction of mitochondrial dysfunction and mitophagy in cancer cells.
Main Methods:
- Synthesis of spindle-shaped iron oxide nanoparticles for enhanced cellular uptake and magnetic transduction.
- Application of external magnetic fields to induce magneto-mechanical stress in mitochondria.
- Evaluation of mitophagy markers, mitochondrial DNA damage, and TUNEL staining in a liver cancer animal model.
Main Results:
- Nano-transducers effectively induced mitochondrial dysfunction and mitophagy in cancer cells.
- Remote magnetic field application led to mitophagy-mediated cancer cell death in vivo.
- Confirmed therapeutic efficacy in a liver cancer animal model.
Conclusions:
- Magnetic nano-transducers offer a novel, non-invasive method for cancer therapy.
- This approach leverages mitophagy for targeted cancer cell elimination.
- Potential for developing advanced nanoparticle-mediated and magneto-genetic tools for cancer treatment.
