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Scientists Identify Genetic Risk Factor for Pulmonary Fibrosis

by Sheela Philomena on May 25, 2013 at 12:10 PM
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 Scientists Identify Genetic Risk Factor for Pulmonary Fibrosis

Genetic risk factor for pulmonary fibrosis has been discovered by researchers.

The team including physicians and scientists at the University of Colorado School of Medicine looked at a fairly common variant of the gene for mucin-5B, a protein that is a component of the mucous produced by the bronchial tubes. While this variant of the MUC5B gene is fairly common, pulmonary fibrosis is an uncommonly reported disease.

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In a review of CT scans of more than 2,600 adults who did not have a clinical diagnosis of pulmonary fibrosis, researchers found imaging evidence of lung inflammation and scarring in about 9 percent of those over age 50. In this age group, these abnormal findings on CT scans were significantly more common among the 21 percent people with the MUC5B genetic variant.

Importantly, definite lung fibrosis seen on CT scan was strongly associated with the MUC5B genetic variant. While these abnormalities do not necessarily indicate a disease that will progress, the presence of these abnormalities were associated with more shortness of breath and cough as well as smaller lung sizes and ability to transfer oxygen.
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The findings suggest that pulmonary fibrosis, which is a condition where lung tissue becomes thickened, stiff and scarred, may be a part of a much more common, but likely less severe, syndrome and could potentially be predicted on the basis of the MUC5B genetic variant.

A paper describing the finding was recently published in the New England Journal of Medicine.

Twenty-one authors shared credit for the paper, including researchers from Brigham and Women's Hospital and Boston University.

Source: ANI
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