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Pinpointing air pollution's effects on the heart
Date:3/9/2011

Scientists are untangling how the tiniest pollution particles which we take in with every breath we breathe affect our health, making people more vulnerable to cardiovascular and respiratory problems. While scientists know that air pollution can aggravate heart problems, showing exactly how it does so has been challenging.

In a study published recently in the journal Environmental Health Perspectives, scientists showed that in people with diabetes, breathing ultrafine particles can activate platelets, cells in the blood that normally reduce bleeding from a wound, but can contribute to cardiovascular disease.

The investigators from the University of Rochester Medical Center studied people with Type 2 diabetes so they could track changes in the blood in response to breathing ultrafine particles, specifically in a group of people who are prone to heart disease. Just last week, other scientists announced in the New England Journal of Medicine that diabetes doubles the risk that a person will die of cardiovascular disease. For the Rochester study, for safety reasons, participants in the study had no clinical evidence of heart or vascular disease.

"What's interesting about our new results is not so much what it shows about people with diabetes," said first author Judith Stewart, M.A. "Rather, it gives us details more generally about how the body's vascular system responds to exposure to ultrafine particles. It's such a complex process to understand it's as if someone gave you a haystack and told you to look for something tiny, but you had no idea what you were actually looking for."

In the study, Stewart and corresponding author Mark Frampton, M.D., tried to tease out some of the details about how air pollution makes bad things happen in the body. It's an area that Frampton, a pulmonary specialist who does research and who treats patients with lung disease, has studied for more than 25 years.

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Contact: Tom Rickey
tom_rickey@urmc.rochester.edu
585-275-7954
University of Rochester Medical Center
Source:Eurekalert

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