“In the brain, plastic particles could increase the risk of inflammation, neurological disorders or even neurodegenerative diseases such as Alzheimer’s or Parkinson’s,” adds his colleague, Lukas Kenner, a researcher at the Medical University of Vienna in Austria. “With the help of computer models, we discovered that a certain surface structure (biomolecular corona) was crucial in enabling plastic particles to pass into the brain,” says Oldamur Hollóczki, a scientist at the University of Debrecen in Hungary. The researchers realized this after giving mice micro- and nanoplastics (MNPs) from polystyrene, a type of plastic widely used commercially such as in food packaging, and then examined the animals. “We show that nanometer sized particles - but not bigger particles - reach the brain within only 2 hours after gavage.” “The blood-brain barrier (BBB) is an important biological barrier that protects the brain from harmful substances,” they explain. Unfortunately, their break down products pollute our environment, leading to widespread contamination with micro- and nanoplastics,” write the scientists, who work in Austria and Hungary. “Humans are continuously exposed to polymeric materials such as in textiles, car tires and packaging.
This could have grave implications for our health, especially as these particles keep on building up in our bodies.Microplastics can cause inflammation in the brain, leading to neurological disorders like Alzheimer’s disease. Now comes research confirming that tiny plastic particles can breach the brain-blood barrier, a network of blood vessels and tissue that protects the brain from toxins and pathogens. Last year scientists discovered that these minute particles can enter our bloodstream and potentially accumulate in our organs over time. Microplastics have become ubiquitous in our environment and more and more data are emerging of their potential harm to our health.
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