Breathing dirty air takes a heavy toll on gut bacteria, boosting risk of obesity, diabetes, gastrointestinal disorders and other chronic illnesses, new University of Colorado Boulder (CU) research suggests.
The study, published online in the journal Environment International, is the first to link air pollution to changes in the structure and function of the human gut microbiome—the collection of trillions of microorganisms residing within us.
The gaseous pollutant ozone, which helps make up Denver’s infamous “brown cloud”—is particularly hazardous, the study found, with young adults exposed to higher levels of ozone showing less microbial diversity and more of certain species associated with obesity and disease.
“We know from previous research that air pollutants can have a whole host of adverse health effects,” said senior author Tanya Alderete, an assistant professor of integrative physiology, pointing to studies linking smog with Type 2 diabetes, weight gain and inflammatory bowel diseases. “The takeaway from this paper is that some of those effects might be due to changes in the gut.”
Researchers from Rush University Medical believe their new study will provide a mechanistic understanding of how our microbiome and diets can impact the development of Alzheimer’s disease. The study will aim to provide evidence of possible diet induced effects on gut bacteria, which could influence age associated cognitive decline.
The study will recruit 300 volunteers from another study, the Chicago MIND cohort, which aims to show whether a dietary intervention can prevent cognitive decline and age-associated changes in the brain. NeuroscienceNews.com image is in the public domain.
Are abnormal intestinal microorganisms a risk factor for developing cognitive impairment? Researchers at Rush University Medical Center are trying to answer that question with a new study that will explore how the intestinal microbiota – the bacteria in the intestine –influence the progression of cognitive decline and the development of Alzheimer’s disease.
Health care providers and researchers increasing are recognizing that the intestinal microbiota – also known as the microbiome – affects health. The human intestine contains tens of trillions of microorganisms, and humans have developed a symbiotic relationship with these bacteria in. Continue reading
Eat less; move more; live longer. I have been preaching that for the nearly nine-year life of this blog. There are lots of ways that exercise benefits our brains as well as our bodies which I hope will protect me from cognitive damage as I age. When it comes to the trillions of microbes in my gut, however, I confess to pretty much total ignorance. They are there. They do their jobs. We get along fine.
A recent issue of the New York Times, however, had Gretchen Reynolds writing about exercise benefiting our gut microbes in some very interesting ways. Here is a link to the article if you would like to read the full details.
Below is a quote of several paragraphs which I found meaningful.
“Most of these changes were not shared from one person to the next. Everyone’s gut responded uniquely to exercise.
“But there were some similarities, the researchers found. In particular, they noted widespread increases in certain microbes that can help to produce substances called short-chain fatty acids. These fatty acids are believed to aid in reducing inflammation in the gut and the rest of the body. They also work to fight insulin resistance, a precursor to diabetes, and otherwise bolster our metabolisms. Continue reading