SRA737 -https://www.icr.ac.uk/news-archive/immune-system-could-be-trained-to-spot-drug-resistant-can23 Jul 2020 12:20
Potential for 'an exciting new avenue of treatment'
Study leader Professor Chris Lord, Deputy Head of Breast Cancer Research at The Institute of Cancer Research, London, said:
“Cancers that have repaired their BRCA mutations are difficult to treat, as their cells have recovered some of the properties of normal cells – in many ways this means that there are no obvious vulnerabilities to target. But we often noted that the way in which some cancer cells repair BRCA genes means that the proteins that they make are not completely normal, and could be recognised by the immune system as foreign, opening up ways to target and treat these cancers by using the immune system.
“We could use immunotherapy drugs like checkpoint inhibitors to harness the body’s immune response, and direct it at reversion mutations. That has the potential to open up an exciting new avenue of treatment for patients with aggressive cancers that are resistant to the best available current drugs.”
Professor Paul Workman, Chief Executive of The Institute of Cancer Research, London, said:
“Cancer evolution and drug resistance is the biggest challenge we face in research and treatment today. Studies like this are incredibly valuable in dissecting out how, why and when cancers can evolve resistance to current drugs.
“Excitingly, this research opens up the potential for a brand new approach to treatment that uses cancer’s defences against it, by targeting the very mutations which give the disease resistance to existing drug therapy.”
Dr Emily Armstrong, research information manager at Cancer Research UK, said:
"Genetic faults in the BRCA genes are involved in multiple cancers including breast and ovarian cancers, so tackling drug resistance associated with these genes could change the lives of a huge number of people.
"This is only a computational prediction at the moment, but it will be very exciting to test in the lab whether the immune system can indeed tell the difference between the healthy proteins and the rewired ones produced by cancer cells, and effectively turn the tumours’ resistance mechanism against them."