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Downregulation of tumor growth and invasion by redox-active nanoparticles
Lirija Alili1, Maren Sack, Claudia von Montfort
1Medical Faculty, Institute of Biochemistry & Molecular Biology I, Heinrich-Heine-University, 40225 Duesseldorf, Germany. lirija.alili@web.de
Aims:
Melanoma is the most aggressive type of malignant skin cancer derived from uncontrolled proliferation of melanocytes. Melanoma cells possess a high potential to metastasize, and the prognosis for advanced melanoma is rather poor due to its strong resistance to conventional chemotherapeutics. Nanomaterials are at the cutting edge of the rapidly developing area of nanomedicine. The potential of nanoparticles for use as carrier in cancer drug delivery is infinite with novel applications constantly being tested. The noncarrier use of cerium oxide nanoparticles (CNPs) is a novel and promising approach, as those particles per se show an anticancer activity via their oxygen vacancy-mediated chemical reactivity.
Results:
In this study, the question was addressed of whether the use of CNPs might be a valuable tool to counteract the invasive capacity and metastasis of melanoma cells in the future. Therefore, the effect of those nanoparticles on human melanoma cells was investigated in vitro and in vivo. Concentrations of polymer-coated CNPs being nontoxic for stromal cells showed a cytotoxic, proapoptotic, and anti-invasive capacity on melanoma cells. In vivo xenograft studies with immunodeficient nude mice showed a decrease of tumor weight and volume after treatment with CNPs.
Innovation:
In summary, the redox-active CNPs have selective pro-oxidative and antioxidative properties, and this study is the first to show that CNPs prevent tumor growth in vivo.
Conclusion:
The application of redox-active CNPs may form the basis of new paradigms in the treatment and prevention of cancers.
Insights
Cerium oxide nanoparticles (CNPs) show anticancer activity by targeting melanoma cells. These nanoparticles reduced tumor growth, weight, and volume in mice, offering a novel approach for cancer treatment.
Area of Science:
- Nanomedicine
- Oncology
- Materials Science
Background:
- Melanoma is an aggressive skin cancer with high metastatic potential and resistance to conventional therapies.
- Nanoparticles offer potential for cancer drug delivery and novel therapeutic applications.
- Cerium oxide nanoparticles (CNPs) exhibit inherent anticancer activity through oxygen vacancy-mediated reactivity.
Purpose of the Study:
- To investigate the potential of cerium oxide nanoparticles (CNPs) in counteracting melanoma cell invasion and metastasis.
- To evaluate the in vitro and in vivo effects of CNPs on human melanoma cells.
Main Methods:
- In vitro studies on human melanoma cells.
- In vivo xenograft studies using immunodeficient nude mice.
- Assessment of cytotoxicity, apoptosis, and anti-invasive capacity of polymer-coated CNPs.
Main Results:
- Nontoxic concentrations of polymer-coated CNPs demonstrated cytotoxic, proapoptotic, and anti-invasive effects on melanoma cells.
- In vivo studies showed a significant decrease in tumor weight and volume following CNP treatment.
- CNPs possess selective pro-oxidative and antioxidative properties, preventing tumor growth.
Conclusions:
- Cerium oxide nanoparticles (CNPs) effectively inhibit melanoma tumor growth in vivo.
- The unique redox properties of CNPs suggest their potential as a novel therapeutic strategy for cancer treatment and prevention.
