A Victoria team is playing a central role in developing a cancer therapy that shows a 90 per cent complete response rate for certain types of leukemia that are otherwise fatal, says a researcher at the Deeley Research Centre.
Immunotherapy is an approach for cancer treatment that uses the patient鈥檚 own immune system 鈥� getting it fired up to destroy cancer cells. It鈥檚 a path Brad Nelson started working in two decades ago, and the last five years have yielded impressive results globally.
鈥淭wenty years ago, (immunotherapy) was very much a futuristic idea,鈥� said Nelson, co-director of the centre based at BC Cancer adjacent to Royal Jubilee Hospital. 鈥淚鈥檝e gone from being a bit on the fringes 鈥� to now doctors, nurses are delivering some types of therapy as standard of care for many cancers.鈥�
Nelson first embarked on T-cell studies as an option to work alongside standard chemotherapy and radiation. Twenty years later, it鈥檚 working.
鈥淭his has been a global phenomenon with breakthroughs at centres around the world,鈥� Nelson said.
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The ultimate goal is to develop safe, potent and cost-effective immunotherapies to battle a range of cancers.
One area of research using chimeric antigen receptor (CAR) T-cells is showing significant signs of success. In the simplest of terms, they take a patient鈥檚 immune cells 鈥� in particular T-cells 鈥� and insert a gene that rewires them. Now hardwired to recognize the cancer, the genetically engineered cells go back into the patient鈥檚 blood stream and circulate.
鈥淭hey鈥檙e now hardwired to 鈥� when they see a tumour cell 鈥� latch on and destroy it,鈥� Nelson said.
In oncology terms, it鈥檚 still a recent development, but showing spectacular results in blood-based cancers, he added.
International clinical trials have shown (CAR) T-cells can achieve up to a 90 per cent complete response rate for certain types of leukemia that are otherwise fatal 鈥� the tumour goes away, it鈥檚 undetectable, Nelson explained.
The Victoria lab has a purpose-built clean room to manufacture the genetically engineered cells. With approvals, the team embarked on a patient trial with treatment taking place in Vancouver and Ottawa. The consortium has treated 60 patients on this trial and recently published results for the first 30 in a peer-reviewed international journal documenting the treatment is safe and effective, Nelson said.
鈥淲e鈥檝e also figured out how to make it cost-effective.鈥�
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Alongside success, the treatment rapidly became commercialized to tune of a $1 million treatment in the U.S.
鈥淚n Canada, we looked at those numbers and thought there鈥檚 just no way our health-care system can support those costs,鈥� Nelson said. 鈥淚n B.C. alone, there are about 100 patients a year that need this therapy.鈥�
Along the way, they鈥檝e created the next generation of cutting-edge clinical researchers
鈥淎nother accomplishment of the program is we鈥檝e created this generation of highly trained, largely younger people who have these skills and great jobs in producing this very sophisticated cancer treatment and really setting B.C. up for the future.鈥�
Julie Nielsen took on the role as leader of cell manufacturing for BC Cancer鈥檚 immunotherapy program about a year ago. She鈥檚 been at the agency for 15 years, lured there by the enthusiastic work of Nelson.
Early on, she was working with patient samples and got to talk to patients. Even though she couldn鈥檛 treat them, patients were interested in hearing about the work and its potential.
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鈥淚鈥檝e always loved being here and loved my job for a lot of reasons. Mainly the patient focus,鈥� Nielsen said. 鈥淣ow we鈥檙e really treating patients. I鈥檝e talked to some of these people and heard their stories, and they鈥檙e just so grateful. It鈥檚 so inspiring.鈥�
Both researchers are grateful to the community that helps fund the work. Beyond Belief is the latest ambitious BC Cancer Foundation campaign to raise $500 million with the goal of investing in research, technology and access. The BC Cancer Foundation raised $77.1 million for BC Cancer last year.
Victoria鈥檚 Deeley Research Centre was funded by the community through the BC Cancer Foundation and much of Nelson鈥檚 research has been made possible through community donations, said William Litchfield, executive director.
鈥淭his is an amazing example of how our community has invested to make a real difference in cancer care, and with our community鈥檚 continued support we will continue to make world-class breakthroughs,鈥� Litchfield said.
Learn more about the campaign at bccancerfoundation.com.
christine.vanreeuwyk@blackpress.ca
