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Cystic fibrosis: improving treatment for lung infections

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Around 10,400 people in the UK – including over 4,000 children – are living with an inherited condition called cystic fibrosis.1 Sadly, two people will lose their lives to the disease every week.2 A major cause of illness and death is persistent chest infections with a bacterium called Pseudomonas aeruginosa. These form structures called biofilms that help them to avoid destruction by antibiotics and the immune system. Dr Tanmay Bharat is leading a team at the University of Oxford who are aiming to understand how biofilms help protect the bacteria and identify new ways to break them down. They hope this will lead to improved treatments that can help clear life-threatening infections from the airways of children with cystic fibrosis.

Action Medical Research and the Cystic Fibrosis Trust are jointly funding this research.

How are children’s lives affected now?

An estimated 1 in every 2,500 babies born in the UK has cystic fibrosis.3 Children experience a range of symptoms including a persistent cough, shortness of breath and frequent chest infections – caused by sticky mucus clogging their lungs and airways.

“Sadly, there is no cure for cystic fibrosis,” says Dr Bharat. “Medications or physiotherapy can help ease a child’s symptoms. But these can be time-consuming – sometimes taking as long as four hours every day – which can have a dramatic impact on their quality of life.”

Although life expectancy is improving for people with the condition, many will lose their lives too soon. Often this is due to progressive damage to their lungs caused by bacterial infections that are hard to treat.

“One bacterium, called Pseudomonas aeruginosa, is a particular problem for people with cystic fibrosis,” says Dr Bharat. “It forms a biofilm that coats the lining of their airways, acting as a barrier that stops antibiotics and immune cells from destroying the bacteria.”

How could this research help?

“If we could identify new ways to wipe out these bacteria by breaking down biofilms, it would help children with cystic fibrosis live longer, better lives,” says Dr Bharat.

The team are investigating substances made and released by the bacteria to understand how they help them to form biofilms that can ‘trap’ antibiotics making them less effective. They will also test specific small biological molecules to see if they can disrupt or prevent biofilms from forming, which they hope will improve the success of antibiotic treatment.

The World Health Organisation lists Pseudomonas aeruginosa as the highest priority for the development of new antibiotic treatments, so the results of this study could shed new light on how to beat it.

 “Our work could open the door for enabling treatments to destroy these bacteria, helping children with cystic fibrosis overcome serious and potentially fatal infections,” says Dr Bharat.


  1. Cystic Fibrosis Trust. UK Cystic Fibrosis Registry. 2016 Annual Data Report. Published August 2017. [Website accessed 28 November 2017]
  2. British Lung Foundation. Cystic Fibrosis statistics: [Website accessed 28 November 2017]
  3. NHS Choices website: [website accessed 28 November 2017]






Project Leader Dr Tanmay A M Bharat, PhD
Project Team Professor Christoph M Tang, PhDDr Rachel M Exley, PhDDr Abul K Tarafder PhD
Project Location Sir William Dunn School of Pathology, University of Oxford
Project duration 3 years
Date awarded 21 November 2017
Project start date 15 January 2018
Project end date 14 January 2021
Grant amount £179,835
Grant code GN2634

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