Copper-based Nanomaterials Kill Cancer Cells

An interdisciplinary team of scientists from KU Leuven (Belgium), the University of Bremen (Germany), the Leibniz Institute of Materials Engineering (Germany), and the University of Ioannina (Greece) has succeeded in killing tumour cells in mice using nano-sized copper compounds together with immunotherapy. After the therapy, the cancer did not return.

Recent advances in cancer therapy use one’s own immunity to fight the cancer. However, in some cases, immunotherapy has proven unsuccessful. The team of biomedical researchers, physicists, and chemical engineers found that tumours are sensitive to copper oxide nanoparticles – a compound composed of copper and oxygen. Once inside a living organism, these nanoparticles dissolve and become toxic. By creating the nanoparticles using iron oxide, the researchers were able to control this process to eliminate cancer cells, while healthy cells were not affected.

Any material that you create at a nanoscale has slightly different characteristics than its normal-sized counterpart,” explain Professor Stefaan Soenen and Dr Bella B. Manshian from the Department of Imaging and Pathology, who worked together on the study. “If we would ingest metal oxides in large quantities, they can be dangerous, but at a nanoscale and at controlled, safe, concentrations, they can actually be beneficial.

As the researchers expected, the cancer returned after treating with only the nanoparticles. Therefore, they combined the nanoparticles with immunotherapy. “We noticed that the copper compounds not only could kill the tumour cells directly, they also could assist those cells in the immune system that fight foreign substances, like tumours,” says Dr Manshian.

The combination of the nanoparticles and immunotherapy made the tumours disappear entirely and, as a result, works as a vaccine for lung and colon cancer – the two types that were investigated in the study. To confirm their finding, the researchers injected tumour cells back into the mice. These cells were immediately eliminated by the immune system, which was on the lookout for any new, similar, cells invading the body.

Source: https://nieuws.kuleuven.be/