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Home Science & Environment Medical Research

New therapeutic vaccine gives hope against an aggressive breast cancer

November 17, 2024
in Medical Research
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New therapeutic vaccine gives hope against an aggressive breast cancer

An experimental vaccine could offer fresh hope to women diagnosed with an aggressive and hard-to-treat form of breast cancer, new research suggests.

The vaccine appears to be safe and effective against triple-negative breast cancer—a type that can’t be treated with hormone therapy because it isn’t driven by any of the three hormones that typically fuel breast cancer.

The good news? Sixteen of 18 patients remained cancer-free three years after receiving the vaccine, which taught their immune systems to kill off any remaining cancer cells, according to results published Nov. 13 in the journal Genome Medicine.

By comparison, only half of patients who receive surgery alone remain cancer-free after three years, according to historical data.

“These results were better than we expected,” said senior researcher Dr. William Gillanders, a professor of surgery at Washington University School of Medicine in St. Louis.

The early clinical trial involved 18 patients with triple-negative breast cancer that hadn’t spread elsewhere in the body.

About 10% to 15% of the breast cancers that occur in the United States are triple-negative, according to the National Breast Cancer Foundation.

To date, triple-negative breast cancer has no targeted therapies. It must be treated with traditional approaches like surgery, chemotherapy and radiation therapy, researchers said in background notes.

The trial patients all had undergone chemotherapy, followed by surgery to remove their breast tumors, researchers said.

The research team analyzed the tumor tissue following surgery to find unique genetic mutations in the patients’ cancer cells. They then crafted a personalized cancer vaccine for each patient, based on those mutations.

Each patient received three doses of the vaccine, which taught their immune systems to recognize the key mutations in their specific breast tumors and attack the cancer cells, the researchers said.

Results showed that 14 out of the 18 patients with triple-negative breast cancer developed an immune response to the vaccine.

“We are excited about the promise of these neo-antigen vaccines,” Gillanders said. “We are hopeful that we will be able to bring more and more of this type of vaccine technology to our patients and help improve treatment outcomes in patients with aggressive cancers.”

However, researchers warned that larger clinical trials are needed to prove the vaccine’s effectiveness.

“We acknowledge the limitations of this type of analysis, but we are continuing to pursue this vaccine strategy and have ongoing randomized controlled trials that do make a direct comparison between the standard of care plus a vaccine, versus standard of care alone,” Gillanders said. “We are encouraged by what we’re seeing with these patients so far.”

More information:
The National Breast Cancer Foundation has more on triple-negative breast cancer.

Xiuli Zhang et al, Neoantigen DNA vaccines are safe, feasible, and induce neoantigen-specific immune responses in triple-negative breast cancer patients, Genome Medicine (2024). DOI: 10.1186/s13073-024-01388-3

Copyright © 2024 HealthDay. All rights reserved.

Citation:
New therapeutic vaccine gives hope against an aggressive breast cancer (2024, November 17)
retrieved 17 November 2024
from

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.




New therapeutic vaccine gives hope against an aggressive breast cancer

An experimental vaccine could offer fresh hope to women diagnosed with an aggressive and hard-to-treat form of breast cancer, new research suggests.

The vaccine appears to be safe and effective against triple-negative breast cancer—a type that can’t be treated with hormone therapy because it isn’t driven by any of the three hormones that typically fuel breast cancer.

The good news? Sixteen of 18 patients remained cancer-free three years after receiving the vaccine, which taught their immune systems to kill off any remaining cancer cells, according to results published Nov. 13 in the journal Genome Medicine.

By comparison, only half of patients who receive surgery alone remain cancer-free after three years, according to historical data.

“These results were better than we expected,” said senior researcher Dr. William Gillanders, a professor of surgery at Washington University School of Medicine in St. Louis.

The early clinical trial involved 18 patients with triple-negative breast cancer that hadn’t spread elsewhere in the body.

About 10% to 15% of the breast cancers that occur in the United States are triple-negative, according to the National Breast Cancer Foundation.

To date, triple-negative breast cancer has no targeted therapies. It must be treated with traditional approaches like surgery, chemotherapy and radiation therapy, researchers said in background notes.

The trial patients all had undergone chemotherapy, followed by surgery to remove their breast tumors, researchers said.

The research team analyzed the tumor tissue following surgery to find unique genetic mutations in the patients’ cancer cells. They then crafted a personalized cancer vaccine for each patient, based on those mutations.

Each patient received three doses of the vaccine, which taught their immune systems to recognize the key mutations in their specific breast tumors and attack the cancer cells, the researchers said.

Results showed that 14 out of the 18 patients with triple-negative breast cancer developed an immune response to the vaccine.

“We are excited about the promise of these neo-antigen vaccines,” Gillanders said. “We are hopeful that we will be able to bring more and more of this type of vaccine technology to our patients and help improve treatment outcomes in patients with aggressive cancers.”

However, researchers warned that larger clinical trials are needed to prove the vaccine’s effectiveness.

“We acknowledge the limitations of this type of analysis, but we are continuing to pursue this vaccine strategy and have ongoing randomized controlled trials that do make a direct comparison between the standard of care plus a vaccine, versus standard of care alone,” Gillanders said. “We are encouraged by what we’re seeing with these patients so far.”

More information:
The National Breast Cancer Foundation has more on triple-negative breast cancer.

Xiuli Zhang et al, Neoantigen DNA vaccines are safe, feasible, and induce neoantigen-specific immune responses in triple-negative breast cancer patients, Genome Medicine (2024). DOI: 10.1186/s13073-024-01388-3

Copyright © 2024 HealthDay. All rights reserved.

Citation:
New therapeutic vaccine gives hope against an aggressive breast cancer (2024, November 17)
retrieved 17 November 2024
from

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.



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