A Vaccine For Pancreatic Cancer Continues To Show Promise
Feb 26, 2025
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Dr. Vinod Balachandran, an expert in pancreatic cancer treatment at Memorial Sloan Kettering, discusses groundbreaking advancements in vaccine development. He shares promising results from a small trial of an mRNA vaccine that showed half of the participants developed a lasting immune response. Remarkably, six out of eight of these patients remained cancer-free for over three years. Balachandran emphasizes the potential of personalized vaccines and the revolutionary shift these could bring to cancer treatment, especially for hard-to-treat cancers.
The development of a personalized mRNA vaccine for pancreatic cancer shows promise, with some patients remaining cancer-free for over three years after treatment.
Recent research indicates that the immune system can be trained to recognize pancreatic cancer cells, challenging previous assumptions about immunotherapy effectiveness in this area.
Deep dives
Advancements in Pancreatic Cancer Vaccination
A research team is developing a promising vaccine for pancreatic cancer, which is notoriously difficult to treat with a high mortality rate. In an early small-scale clinical trial, 16 patients were vaccinated, resulting in notable immune responses in half of the participants, who exhibited no cancer recurrence after 18 months. The recent follow-up study found that those who responded to the vaccine maintained a lack of recurrence approximately three years later, highlighting the potential efficacy of this treatment. This research offers hope for new therapeutic avenues in combating other difficult cancers by teaching the immune system to recognize and attack cancerous cells.
Understanding the Mechanism Behind Immune Recognition
Pancreatic cancer presents a unique challenge because it has historically been thought that the immune system could not recognize its cells as foreign. Recent findings suggest that the immune system can indeed be trained to identify cancer through the recognition of mutated proteins on cancer cells, which serve as red flags. This discovery overturns the previous assumption that immunotherapy wouldn't be effective for pancreatic cancer. By teaching the immune system to recognize these mutations, there is potential not only for pancreatic cancer treatment but also for other cancers that have similarly high unmet needs.
Personalized mRNA Vaccine Development
The mRNA vaccine developed for pancreatic cancer is tailored to each individual, based on the unique genetic characteristics of their tumor. After surgically removing the tumor, genetic analysis is conducted to identify specific 'flags' present on the cancer cells, allowing for the creation of a bespoke vaccine for each patient. This individualized approach contrasts with traditional vaccines, which are designed for broader populations. While currently effective for post-surgery recurrence prevention, future research may enable the development of preventative vaccines for pancreatic cancer using accumulated knowledge about these flags.
Pancreatic cancer is notoriously difficult to treat, and about 90% of diagnosed patients die from the disease. A team at Memorial Sloan Kettering has been working to improve those outcomes by developing a new mRNA vaccine for pancreatic cancer.
A few years ago, the team embarked on a small trial to test the vaccine’s safety. Sixteen patients with pancreatic cancer received it, and even though it was a small study, the results were promising: Half the participants had an immune response, and in those patients the cancer hadn’t relapsed after 18 months.
This week, the team released a new study in Nature following those same patients, and found six out of eight who responded to the vaccine in the first study did not have their cancer return more than three years later.
Joining host Flora Lichtman to talk about these results, and what they could mean for the future of cancer treatment, is study author and surgeon Dr. Vinod Balachandran, director of The Olayan Center for Cancer Vaccines at Memorial Sloan Kettering, based in New York City.
Transcripts for each segment will be available after the show airs on sciencefriday.com.