Researchers found that combination of nanoparticles and contaminants might be harmful to human cells, according to a study published on August 20, 2018.
This study was conducted by the researchers at the University of Southern Denmark. The presence of nanoparticles in the environment is increasing rapidly. Silver nanoparticles are one example: they have an effective antibacterial effect and can be found in refrigerators, sports clothes, cosmetics, tooth brushes, water filters, and others.
There is a significant difference in the way cells react when they are exposed to nanosilver alone and when they are exposed to a cocktail of nanosilver and cadmium ions. Cadmium ions are naturally found everywhere around us on Earth. In the studies conducted by the researchers on human liver cancer cells, 72 pct. of the cells died when they were exposed to both nanosilver and cadmiun ions. When they were exposed to nanosilver only, 25 pct. Died and when exposed to cadmium ions, only 12 pct. died.
Professor Frank Kjeldsen, Dept of Biochemistry and Molecular Biology, SDU, said, “This study indicates that we should not look at nanoparticles isolated when we investigate and discuss the effects, they may have on our health. We need to take cocktail effects into account.” Products with nano particles are being developed and manufactured every day, however, in most countries there are no regulations, so there is no way of knowing what and how many nanoparticles are being released into the environment.