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Lung regeneration closer to reality with new discovery by Weill Cornell Medical College researchers
Date:10/28/2011

NEW YORK (Oct. 28, 2011) -- Researchers at Weill Cornell Medical College say they have taken an important step forward in their quest to "turn on" lung regeneration -- an advance that could effectively treat millions of people suffering from respiratory disorders.

In the Oct. 28 issue of the journal Cell, the research team reports that they have uncovered the biochemical signals in mice that trigger generation of new lung alveoli, the numerous, tiny, grape-like sacs within the lung where oxygen exchange takes place. Specifically, the regenerative signals originate from the specialized endothelial cells that line the interior of blood vessels in the lung.

While it has long been known that mice can regenerate and expand the capacity of one lung if the other is missing, this study now identifies molecular triggers behind this process, and the researchers believe these findings are relevant to humans.

"Several adult human organs have the potential upon injury to regenerate to a degree, and while we can readily monitor the pathways involved in the regeneration of liver and bone marrow, it is much more cumbersome to study the regeneration of other adult organs, such as the lung and heart," says the study's lead investigator, Dr. Shahin Rafii, who is the Arthur B. Belfer Professor of Genetic Medicine and co-director of the Ansary Stem Cell Institute at Weill Cornell Medical College.

"It is speculated, but not proven, that humans have the potential to regenerate their lung alveoli until they can't anymore, due to smoking, cancer, or other extensive chronic damage," says Dr. Rafii, who is also an investigator at the Howard Hughes Medical Institute. "Our hope is to take these findings into the clinic and see if we can induce lung regeneration in patients who need it, such as those with chronic obstructive pulmonary disease (COPD)."

"There is no effective therapy for patients diagnosed with COPD. Based on this study,
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Contact: John Rodgers
jdr2001@med.cornell.edu
212-821-0560
New York- Presbyterian Hospital/Weill Cornell Medical Center/Weill Cornell Medical College
Source:Eurekalert

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