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Cystic fibrosis drug Kalydeco approved by FDA, shows promise

January 31, 2012|By Amina Khan, Los Angeles Times / For the Booster Shots blog
  • Kiley Mercado's son Michael gets daily treatments for cystic fibrosis. The FDA has fast-tracked approval for Kalydeco, a drug that could help some patients.
Kiley Mercado's son Michael gets daily treatments for cystic fibrosis.… (Stephen Osman / Los Angeles…)

The first drug that targets an underlying cause of cystic fibrosis rather than the symptoms -- essentially allowing some sufferers to live a nearly normal life -- has been approved by the Food and Drug Administration.

The drug Kalydeco (also known by its generic name, ivacaftor) helps a defective protein that acts as a chloride-pump in cell membranes to function properly, restoring the proper flow of water in the body. As a result, patients' mucus-filled lungs begin to clear, making them less prone to infection and perhaps allowing them to live far beyond the age of 37 -- the current average life expectancy.

“Kalydeco is an excellent example of the promise of personalized medicine -- targeted drugs that treat patients with a specific genetic makeup,” FDA Commissioner Dr. Margaret A. Hamburg said in a news release. The FDA fast-tracked Kalydeco and approved it in three months, given the drug's early signs of promise.

For now, the drug helps only the 4% to 5% of cystic fibrosis patients with a particular genetic mutation. But drug maker Vertex Pharmaceuticals aims to develop other drugs that, used in combination with ivacaftor, may help many more patients as well.

Lindsay Shipp, who I wrote about last year, was one of the first patients to benefit from a trial of the drug. Shipp, based in San Diego, gave up singing and dancing after it became too difficult to breathe or even climb stairs -- but taking ivacaftor has changed that.

"It's like there's someone else's lungs inside of me," she said at the time. "It's awesome — I feel like I can do anything." Read on.

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