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Stem Cell Research for Cystic Fibrosis Moves Forward

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ADELAIDE, SA (AU), August 2018 — The fight against cystic fibrosis (CF) has taken a major step forward, with pioneering research by University of Adelaide scientists showing that cells causing the debilitating genetic disorder could be successfully replaced with healthy ones.

The research applies cell transplantation therapy, normally used in bone marrow transplants to treat immunodeficiency disorders.

“There are 70,000 people worldwide living with CF for which there is currently no cure, and disease in the lungs is the major cause of poor health and a significantly shortened life span,” said Nigel Farrow, a post-doctoral research fellow from the University of Adelaide’s Robinson Research Institute, who conducted the study alongside David Parsons, Ph.D., head of the research team based in the Women’s and Children’s Hospital.

In Australia, one in every 2,500 babies has CF, and one in 25 people carry the defective gene. Even though carriers are not affected by the disorder, they may pass the gene to their children. If both parents are carriers, each of their children has a one in four chance of being born with the disorder.

“Our research, which applies stem cell transplantation, involves harvesting adult stem cells from the lungs of CF patients, correcting them with gene therapy and then reintroducing those cells back into the patient,” said Dr. Farrow.

“The new transplanted adult stem cells pass on their healthy genes to their ‘daughter cells,’ providing a constant means to replenish the airways with healthy cells and thereby combatting the onset of cystic fibrosis airway disease,” he added.

Working in mouse airways, the group successfully tested its new transplantation method, using a marker gene in place of the corrective CF gene in initial studies.

“The key to these successful transplantations was our innovative method; we first eliminated the existing surface cells, which then created the space required to introduce the new cells,” Dr. Farrow explained.

CF affects a person’s lungs and digestive system causing a build-up of mucus that seriously impairs their breathing and significantly increases the chances of chest infections. Patients such as Nathan Rae are required to undergo a range of regular therapies to help to alleviate the symptoms of CF. 

“I have intensive daily physiotherapy to clear my airways, eat a nutritious high-fat, high-calorie diet with lots of extra salt and vitamins, and take drugs that help me digest my food,” Rae said.

“Exercise is really important, but as I regularly get chest infections, I have frequent hospital admissions, which inhibits my ability to exercise as much as I’d like,” he said. 

This pioneering research demonstrates that, in principle, human airway stem cells can be transplanted into the lining of the lungs. 

“If we can perfect this technique, it will accelerate this exciting research, which could significantly improve the lives of those living with cystic fibrosis and potentially combat this chronic life-limiting illness,” Dr. Farrow said.

The study appears in Stem Cell Research and Therapy.

Learn more:
https://www.adelaide.edu.au/news/news101662.html
DOI: 10.1186/s13287-018-0911-4