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Groundbreaking Treatment for Patients with Cystic Fibrosis

By Drug Discovery Trends Editor | May 18, 2015

Treatment with two medications that target the most common genetic cause of cystic fibrosis improves lung function and lowers the rate of pulmonary exacerbations, according to the results from a Phase 3 international clinical trial published online in the New England Journal of Medicine. Combined lumacaftor-ivacaftor therapy was shown to be safe and effective for cystic fibrosis patients with two copies of the cystic fibrosis gene mutation (F508del) found in nearly half of the patients with this disease.
 
“These groundbreaking findings will benefit around 15,000 patients in U.S. alone,” said Susanna McColley, MD, one of the study’s authors and Professor of Pediatrics at Northwestern University Feinberg School of Medicine. She also is the Director of the Clinical and Translational Research Program at the Stanley Manne Children’s Research Institute, the research arm of Ann & Robert H. Lurie Children’s Hospital of Chicago.
 
Cystic fibrosis is a genetic disease that causes the body to make thick, sticky mucus. In the lungs, the mucus leads to chronic infections and increasing loss of lung function. In the pancreas, the thick mucus keeps enzymes from reaching the gut to digest food. The median life expectancy is 37 years, and available treatments mostly focus on managing symptoms and consequences of the disease.
 
“While significant progress has been made with supportive therapies for cystic fibrosis, developing treatments that address the underlying genetic cause has been a challenge,” said McColley who also is the Associate Director of the Cystic Fibrosis Center at Lurie Children’s. “Just a few years ago, ivacaftor became the only FDA-approved drug for the genetic defect in cystic fibrosis, but it only works for genetic mutations found in a small portion of cystic fibrosis patients. Our study showed that combining ivacaftor with lumacaftor helps patients with the most common cystic fibrosis mutation. This is an exciting step forward.”
 
The randomized, double-blind, placebo-controlled clinical trial included a total of 1,108 patients, 12 years of age and older, who were treated for 24 weeks in multiple centers. “We will need more analyses and longer-term data to see if this treatment can alter the disease course and further extend the life expectancy of our patients,” said McColley. The FDA Pulmonary-Allergy Drugs Advisory Committee met on May 12 to consider the results of this study. Final FDA approval is pending.
 
Source: Lurie Children’s Cystic Fibrosis Center 

Filed Under: Drug Discovery

 

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