Smoking cigarettes simulates cystic fibrosis

If you smoke cigarettes, you have more in common with someone who has cystic fibrosis than you think. A new research report appearing online in the FASEB Journal shows that smoking cigarettes affects the lungs in a way that is very similar to cystic fibrosis, a life threatening disease affecting the lungs and other organs.

In , improper movement of salt and water in the cells lining the lungs causes a thick and sticky mucus to form. Bacteria become trapped in this mucus and thrive, leading to life-threatening lung infections. The FASEB Journal study shows that smoking negatively affects the lungs in a similar way, leading to mucus that causes , , and , among other problems.

"We hope this study will highlight the importance of airway hydration in terms of lung health and that it will help provide a road map for the development of novel therapies for the treatment of smoking-related lung disease," said Robert Tarran, Ph.D., a researcher involved in the work from the Cystic Fibrosis/Pulmonary Research and Treatment Center at the University of North Carolina at Chapel Hill.

To make this discovery, Tarran and colleagues conducted multiple experiments both in humans and in laboratory-grown cells testing the effects of on the function of a protein that helps the lungs stay hydrated, called "CFTR." They found that people exposed to cigarette smoke had a 60 percent decrease in CFTR activity, compared to those exposed only to clean air. They also exposed human to either air or cigarette smoke and the measured the level of liquid covering the lung cells. The cells exposed to cigarette smoke had much lower liquid levels, which remained low for at least two and a half hours. Additional studies showed that this was caused by cigarette smoke interfering with CFTR's function. Finally, the researchers found that the addition of hypertonic saline -- a treatment for cystic fibrosis -- to cells exposed to cigarette smoke caused the level of liquid above the cells to increase toward normal levels. The hypertonic saline treatment also increased mucus clearance.

"This novel finding suggests that treatments aimed at cystic fibrosis might also help people with caused smoking-related diseases - and vice versa," said Gerald Weissmann, M.D., Editor-in-Chief of The , "But the bottom line remains: the most effective treatment for smoker's cough, or worse, is to quit smoking, now! "


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More information: Lucy A. Clunes, Catrin M. Davies, Raymond D. Coakley, Andrei A. Aleksandrov, Ashley G. Henderson, Kirby L. Zeman, Erin N. Worthington, Martina Gentzsch, Silvia M. Kreda, Deborah Cholon, William D. Bennett, John R. Riordan, Richard C. Boucher, and Robert Tarran. Cigarette smoke exposure induces CFTR internalization and insolubility, leading to airway surface liquid dehydration. FASEB J. doi:10.1096/fj.11-192377
Citation: Smoking cigarettes simulates cystic fibrosis (2011, October 12) retrieved 16 June 2019 from https://medicalxpress.com/news/2011-10-cigarettes-simulates-cystic-fibrosis.html
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