March 1, 2021
Research breakthrough paves way for more cancer patients to benefit from immunotherapy, regardless of ancestry
OICR Investigator, Dr. Naoto Hirano, expands arsenal of immunotherapy technologies, opening new frontiers in immunotherapy for cancer patients and beyond
Adoptive cell therapy is a promising cancer treatment that uses our immune system to eliminate cancer cells. These treatments, however, are only effective for a small subset of individuals with specific types of cancer and specific inherited genes. Dr. Naoto Hirano’s recent breakthrough paves the way for novel immunotherapies to help more patients, regardless of their genetic ancestry, live longer and healthier lives.
In a study published in Nature Biotechnology, Hirano and his collaborators developed a new technology that rigorously and robustly identifies the immune cells that are capable of recognizing and eliminating cancer cells. This technology allows researchers to develop new immunotherapies for cancer patients that are not limited by the differences – or heterogeneity – of tumour cells, thus expanding the potential impact of immunotherapy for patients around the world.
Hirano’s technology applies to an immunotherapy approach called T cell receptor (TCR) gene therapy that is based on genetically-engineered immune cells (T cells) recognizing and binding to specific molecules, called peptide-loaded human leukocyte antigens (HLA), on the surface of cancer cells. Although there has been progress in TCR therapy, there are more than 28,000 different variations of HLA found in humans and current TCR therapies only work for a few of these variations.
“Historically, TCR treatments have been developed for those who had the most common and well-studied HLA alleles, which often meant that these immunotherapies only worked for people from Caucasian ancestry,” says Hirano, who is a Senior Scientist at the Princess Margaret Cancer Centre and OICR Clinician Scientist. “It was an important goal for us to develop a technology that could work for a broad range of HLA alleles. We’re proud of what we developed because it could help many more cancer patients in the future.”
The technology presented in this study involves a methodology that can – in a single step at a low expense – form a functional protein structure, called a dimer, that is comprised of any peptide and HLA molecule, regardless of type, and can bind to and identify a variety of T cells. The method improves the binding affinity between T cells and HLA molecules nearly 200-fold relative to prior methods, which could allow researchers to better identify and engineer the T cells for novel immunotherapies.
The technology has been licensed to TCRyption Inc. for further development, translation, and large-scale implementation. In the future, it may be applied to fields other than cancer research and care, including autoimmune diseases such as rheumatoid arthritis and type 1 diabetes.
“I’m grateful for the cancer research community’s support over the years, which has enabled me to focus on important and challenging issues,” says Hirano, who was named the University Health Network’s Inventor of the Year last year for developing these analysis techniques. “Only with the support for rigorous experimentation, deep expertise, and innovative thinking, were we able to make this breakthrough.”
Note: N.H. has received research funding from Takara Bio and served as a consultant for Takara. The University Health Network has filed a patent application related to this study on which N.H. is named as a lead inventor. N.H. is cofounder and has equity in TCRyption to which the technologies used in this study have been licensed.
February 21, 2019
OICR supports cancer drug discovery in Ontario with new funding for four promising early-stage projects
Toronto (February 21, 2019 | Updated July 15, 2019) – The Ontario Institute for Cancer Research (OICR) today announced that three Early Accelerator projects from across Ontario will each receive $100,000 for one year as part of OICR’s Cancer Therapeutics Innovation Pipeline (CTIP) initiative. The funding will be used to validate cancer targets and support experiments to screen molecules against these targets, finding those that can bind to them successfully and have potential to be developed into medicines.Continue reading – OICR supports cancer drug discovery in Ontario with new funding for four promising early-stage projects
February 15, 2017
Biotherapeutics, a relatively new class of treatments, have shown great promise and are generating a lot of excitement in the cancer research community. These treatments harness the power of oncolytic viruses, cell therapies and antibodies to kill cancer. BioCanRX, Canada’s biotherapeutics research network, has announced $11 million in funding for 16 projects that will enable scientists across the country to bring their innovations to patients sooner.