Microbes and The Mind

By Rob Stein Health & Science

Clues also are emerging about how microbes may affect the brain. Manipulating gut microbiomes of mice influences their anxiety and activity, Swedish researchers reported in January in the Proceedings of the National Academy of Sciences.

“This may have implications for new lines of thinking to address some of the psychiatric problems you see among humans,” said Sven Pettersson, a professor of host-microbial interaction at the Karolinska Institute. “Together with genetic susceptibility, this may influence what doctors classify as autism or ADHD.”

In another experiment involving mice, a Canadian-Irish team reported in August that bacteria in the gut appear to influence brain chemistry, and corresponding behaviors such as anxiety, stress and depression, via the vagus nerve.

“What we’ve shown is, you change behavior as well as make changes in the brain,” said John Bienenstock, director of the Brain-Body Institute at McMaster University. “Now we have direct proof how that happens. That’s why this is exciting.”

Referencee Source: washingtonpost.com