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Oxygen levels increase and decrease the effectiveness of anti-inflammatory therapies
Date:12/2/2013

Bethesda, MDA new research discovery published in the December 2013 issue of the Journal of Leukocyte Biology yields an important clue toward helping curb runaway inflammation. Oxygen levels play a critical role in determining the severity of the inflammatory response and ultimately the effectiveness of anti-inflammatory drugs. This research could have significant future benefits for patients with severe asthma, COPD, rheumatoid arthritis, pulmonary fibrosis and coronary artery disease.

According to John Marwick from the MRC Centre for Inflammation Research at The Queen's Medical Research Institute at the University of Edinburgh Medical School in Edinburgh, Scotland, and a researcher involved in the work, "Inflammatory diseases contribute to countless deaths and suffering of people. We hope that by understanding the processes involved in inflammation we will herald the arrival of new and targeted anti-inflammatory drugs that have fewer side effects than what is currently available."

To make this discovery, researchers isolated neutrophils, the immune cells that are responsible for acute inflammation, from the blood of healthy volunteers and incubated them in different levels of oxygen. They then added substances that are usually present at sites of inflammation in humans, both with and without anti-inflammatory glucocorticoid drugs and studied what effect these factors had on neutrophil lifespan. They found that the oxygen levels altered the effectiveness of the drugs, which suggests that these drugs may be less effective for some diseases than they are for others. Future areas of research include developing a deeper understanding of exactly how these drugs work under different conditions to ultimately help with development of new, better tolerated anti-inflammatory therapies.

"This report may shed light on why some people respond better to anti-inflammatory drugs than othe
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Contact: Cody Mooneyhan
cmooneyhan@faseb.org
301-634-7104
Federation of American Societies for Experimental Biology
Source:Eurekalert

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