Through gaining a better understanding of how this process works, researchers hope to be able to determine a way of tailoring immunotherapy to better fight cancer.
This research lays the foundation for future studies into the body’s response to environmental stressors, such as injury, infection or cancer, at a single cell level.
Dendritic cells are immune cells that activate ‘killer’ T cells, which are vital for clearing viral infections, such as COVID-19, but also for triggering a response to cancers such as melanoma and bowel cancer.
The Flt3L hormone can increase dendritic cell numbers, helping the immune system to fight off cancer and infection.
Dr Naik and his team studied developing immune cells at a single cell level to gain a deeper understanding of how the body uses these cells to trigger immune responses.
“There is one type of dendritic cell that the body uses to fight some infections and cancer. The Flt3L hormone increases numbers of this particular dendritic cell.”
“We know quite well how the dendritic cell fights the cancer, but we don’t know how the Flt3L hormone increases the numbers of those dendritic cells,” he said
Researchers used a single-cell ‘barcoding’ technique to uncover what happened when dendritic cells multiplied.
“By using cellular barcoding – where we insert short synthetic DNA sequences, we call barcodes inside cells – we were able to determine which cells produced dendritic cells in pre-clinical models,” Dr Naik said.
“As a result of this research, we now better understand the actions of the Flt3L hormone that is currently used in cancer immunotherapy trials, and how it naturally helps the body fight cancer and infection. This is a first step to design better precision immunotherapy treatments for cancer.”
This research answers a 50-year-long question as to what causes a stem cell to react in response to immense stress, such as infection or inflammation.
“We have known that the Flt3L hormone increases the number of dendritic cells for decades but now there is a focus on applying this knowledge to cancer immunotherapy and potentially to infection immunotherapy as well,” Dr Naik said.
“The next stage in our research is to create ‘dendritic cell factories’ using our new knowledge, to produce millions to billions of these infection fighting cells and then use those in immunotherapy treatments.”
“These findings are a vital first step to improving immunotherapy treatments for patients, to help them better fight cancer and infection.”
Dawn Lin, Luyi Tian, Sara Tomei, Daniela Amann-Zalcenstein, Tracey Baldwin, Tom Weber, Jaring Schreuder, Olivia Stonehouse, Samir Taoudi, Matthew Richie, Philip Hodgkin, Ashley Ng, Stephen Nutt, Shalin Naik.
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