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Researchers find common childhood asthma unconnected to allergens or inflammation
Date:5/23/2013

NEW YORK (May 23, 2013) -- Little is known about why asthma develops, how it constricts the airway or why response to treatments varies between patients. Now, a team of researchers at Weill Cornell Medical College, Columbia University Medical Center and SUNY Downstate Medical Center has revealed the roots of a common type of childhood asthma, showing that it is very different from other asthma cases.

Their report, in Science Translational Medicine, reveals that an over-active gene linked in 20 to 30 percent of patients with childhood asthma interrupts the synthesis of lipid molecules (known as sphingolipids) that are part of cell membranes found all over the body.

Although the researchers do not yet understand why asthma results from reduced production of sphingolipids, their experiments clearly show a link between loss of these lipids and bronchial hyperreactivity, a key feature of asthma.

What makes this pathway unique, investigators say, is that it is not related to allergens and, the investigators discovered, has nothing to do with inflammation.

"Usually asthma is thought to be an inflammatory disease or a reaction to an allergen. Our model shows that asthma can result from having too little of a type of sphingolipids. This is a completely new pathway for asthma pathogenesis," says the study's senior author, Dr. Stefan Worgall, chief of the Pediatric Pulmonology, Allergy and Immunology Division at NewYork-Presbyterian Hospital/Weill Cornell Medical Center.

This is very good news, he adds. "Our findings are not only valuable in understanding the pathogenesis of this complex disease, but provide a basis to develop novel therapies, especially asthma agents based on a patient's genotype," says Dr. Worgall, who is also a distinguished professor of pediatric pulmonology, professor of pediatrics and associate professor of genetic medicine at Weill Cornell Medical College.

Precision Medicine for Asthma
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Contact: John Rodgers
jdr2001@med.cornell.edu
646-317-7401
Weill Cornell Medical College
Source:Eurekalert

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