Tag Archives: 6th International meeting on the Environmental Effects on Nanoparticles and Nanomaterials

Brain injuries in fish and nanoparticles?

I would have liked more details about the fish and how nanoparticles cause brain injuries. Here’s an excerpt from the Sept.19, 2011 news item on Nanowerk,

Scientists at the University of Plymouth have shown, for the first time in an animal, that nanoparticles have a detrimental effect on the brain and other parts of the central nervous system.

They subjected rainbow trout to titanium oxide [or titanium dioxide as it’s sometimes called] nanoparticles which are widely used as a whitening agent in many products including paints, some personal care products, and with applications being considered for the food industry. They found that the particles caused vacuoles (holes) to form in parts of the brain and for nerve cells in the brain to die. Although some effects of nanoparticles have been shown previously in cell cultures and other in vitro systems this is the first time it has been confirmed in a live vertebrate.

I have a number of questions after reading this (and the rest of the news item).

  • The statement is that nanoparticles cause brain injury in fish but the researchers mention titanium di/oxide nanoparticles only.  Did they test other nanoparticles as well?
  • How did they conduct the tests?
  • Did the fish ingest titanium di/oxide from the water? From their food? From both?
  • What concentrations were they exposed to?
  • Were they in an environment similar to what they’d experience naturally? Or were they in special tanks?

Apparently the results are being presented in London at the “6th International meeting on the Environmental Effects on Nanoparticles and Nanomaterials” (21st – 23rd September [2011]) at the Royal Society.

Using an incendiary headline (Nanoparticles cause brain injury in fish) for your news release is certainly an attention getter. I trust the research team (led by Professor Richard Handy of the Plymouth University Ecotoxicology Research and Innovation Centre’s Environmenal nanoscience and nanotoxicology team) can back up this statement with data and that it will be made available to a broader audience than the meeting attendees.