New approach to treating cystic fibrosis

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CF is a genetic disease that affects about 1,300 children and adults in Ireland and 70,000 worldwide. The main cause of death in people with CF is lung disease, which is driven by severe inflammation and chronic infection in the airways.

While recent years have seen the emergence of several new therapies aimed at improving lung function and survival, the lack of effective anti-inflammatory and anti-infective treatments for these individuals continues to represent a significant challenge.

The researchers found that one of the most aggressive bacteria found in the lungs of those with CF caused certain immune cells to change their metabolism. This change caused the immune cells to produce a protein that causes more inflammation. They identified that high levels of the protein were associated with worse lung function and a higher risk of death or need for a lung transplant.

Improving patient outcomes

The team then used a small molecule called MCC950 to reduce levels of the protein in a laboratory model of CF. In addition to reducing inflammation, this also helped clear the lungs of bacteria. This marks the first time that researchers were able to stop this protein in CF in vivo by targeting cell metabolism, which could potentially lead to a new approach to treating inflammatory diseases like CF.

“This is an important first step to significantly improving patient outcomes for people with cystic fibrosis. While more testing is required before delivering this to patients, we believe these results are very promising and could make this molecule a candidate for clinical trials,” said Professor Gerry McElvaney, the study’s joint senior author and professor of medicine at RCSI.

"Previously, people with CF had a very low life expectancy. Due to improvements in medical treatment, these individuals are now living longer. However, they still suffer from a very severe disease. We hope that this advancement can lead to further improvements in outcome, better quality of life and eventually a normal life expectancy for our patients,” said Dr Oliver McElvaney, the study’s lead author.

The study, led by researchers at RCSI (Royal College of Surgeons in Ireland), is published in the current edition of the American Journal of Respiratory and Critical Care Medicine.