Thousands of consumer products — including cosmetics, sunscreens, and clothing — contain nanoparticles added by manufacturers to improve texture, kill microbes, or enhance shelf life, among other purposes. However, several studies have shown that some of these engineered nanoparticles can be toxic to cells.
A new study from MIT and the Harvard School of Public Health (HSPH) suggests that certain nanoparticles can also harm DNA. This research was led by Bevin Engelward, a professor of biological engineering at MIT, and associate professor Philip Demokritou, director of HSPH’s Center for Nanotechnology and Nanotoxicology.
The researchers found that zinc oxide nanoparticles, often used in sunscreen to block ultraviolet rays, significantly damage DNA. Nanoscale silver, which has been added to toys, toothpaste, clothing, and other products for its antimicrobial properties, also produces substantial DNA damage, they found.
The research was funded by MIT’s Center for Environmental Health Sciences, the National Institute of Environmental Health Sciences, the National Science Foundation, and the National Institutes of Health. Other authors of the study are MIT graduate student Jing Ge, Harvard graduate student Joel Cohen, and Harvard postdoc Georgios Pyrgiotakis.
Read the article on MIT news. Photo courtesy Christine Daniloff