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Date: 10 August 2020

Time: 17:51

3D rendering of human body with the lungs highlighted red

Precision medicine trial highlights the need for a new approach

Story posted/last updated: 22 July 2020

A pioneering lung cancer study, which has recruited patients at hospitals across the country, including University Hospitals Birmingham NHS Foundation Trust (UHB), has highlighted important factors that will need to be considered in the next wave of precision medicine studies particularly in treating genomically complicated cancers.

Published in Nature, the National Lung Matrix Trial (NLMT) is the world’s largest precision medicine clinical trial for non-small-cell lung cancer (NSCLC) patients, led by the University of Birmingham’s Cancer Research UK Clinical Trials Unit, funded by Cancer Research UK (CRUK) and supported by the charity’s Stratified Medicine Programme Phase 2 (SMP2) screening platform.

The NLMT matches different treatments to different groups of patients based on genetic changes in their cancer.

Using an innovative trial design that incorporates multiple treatment arms, NLMT allows for a more flexible and informed approach than traditional clinical trials. Each arm tests a different targeted treatment matched to a different genetic subtype of NSCLC.

The trial’s adaptive approach makes it possible for new drugs and combinations to be added as soon as they become available or retired quickly and easily if evidence suggests they aren’t effective.

Paul Inett, 72 years old, took part at the Queen Elizabeth Hospital Birmingham, part of UHB.

He said: "I was diagnosed with stage four metastatic lung cancer in late April 2015 that had spread to glands in my chest.

"I was referred to Professor Gary Middleton at the Queen Elizabeth Hospital Birmingham and was recruited onto the National Lung Matrix Trial. Fortunately my biopsy showed a genetic marker that matched to one of the treatment arms on the trial and received a targeted cancer drug, which helped to save my life.

"I’m now able to live a relatively active life including spending time with my family and taking exercise classes at my local gym."

Since the trial opened to recruitment in May 2015 until November 2019, 288 patients have been recruited to the 19 targeted treatment cohorts on the trial.

Results revealed key learnings on the use of precision medicine, such as how the appropriate pre-clinical work is essential in defining appropriate biomarker-drug combinations to test in the clinic, on ensuring that the best drugs available are used to hit the genomic targets, the scale of attrition from large screening platforms, and the importance of analysing and publishing outcome data of an ongoing study.

Another key finding was that targeted therapy trials should take place much earlier in the cancer journey and use blood based genomic testing for fast turnaround of the information needed to match patients to drugs.

Lead author Professor Gary Middleton, Medical Oncologist at the University of Birmingham, said: "This study provides data on how the next wave of trialling targeted therapies to treat complex cancers should be designed.

"This is the first trial of its kind, the novel Bayesian design allows outcome data from open cohorts that are still recruiting to be reported alongside closed cohorts, whereas previous umbrella studies have only published the results of completed arms and cohorts.

"We found genomically complicated tumours are hard to treat with targeted therapy, especially with monotherapy.

"The models we test drugs on are too simplistic - they don’t represent the genomic complexity of the tumour, or the trajectory of how they rapidly evolve. We need models that take into account the complexity and trajectory of a human tumour to decide if a drug is going to work."

Dr Ian Walker, Director of Research at Cancer Research UK, said: "The National Lung Matrix trial is a flagship programme for Cancer Research UK and continues to provide significant insights into how we should treat genomically diverse cancers, such as lung. Not only will it shape the thinking for future studies delivering complex precision medicines, but it has also demonstrated how molecular diagnostic testing and clinical research can work in a truly integrated manner within the National Health Service across the UK to allow patients to access the latest new treatments."

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