The findings could explain why being overweight or obese increases asthma risk, researchers say.
Getty ImagesAustralian researchers analysed lung samples from 52 people and found the amount of fat increased in line with body mass index.Lung experts said it would be interesting to see if the effect could be reversed by weight loss.In the study, published in the European Respiratory Journal, scientists looked at post-mortem samples of lung donated for research.
The researchers found adipose tissue in the walls of airways, with more present in people with a higher body mass index, "We think this is causing a thickening of the airways that limits the flow of air in and out of the lungs and that could at least partly explain an increase in asthma symptoms."Prof Thierry Troosters, president of the European Respiratory Society, said:"This is an important finding on the relationship between body weight and respiratory disease because it shows how being overweight or obese might be making symptoms worse for people with asthma.
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