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Personalized Cancer Vaccine Guided by Mount Sinai Computations Is Safe, Shows Potential Benefit Against Multiple Tumor Types
  • USA - English

A personalized cancer vaccine developed with the help of a Mount Sinai computational platform raised no safety concerns and showed potential benefit in patients with different cancers, including lung and bladder, that have a high risk of recurrence, according to results from an investigator-initiated phase I clinical trial presented during the virtual American Association for Cancer Research (AACR) Annual Meeting 2021, held April 10-15.


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Mount Sinai Health System

Apr 10, 2021, 08:40 ET

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NEW YORK, Apr. 10, 2021 /PRNewswire-PRWeb/ -- A personalized cancer vaccine developed with the help of a Mount Sinai computational platform raised no safety concerns and showed potential benefit in patients with different cancers, including lung and bladder, that have a high risk of recurrence, according to results from an investigator-initiated phase I clinical trial presented during the virtual American Association for Cancer Research (AACR) Annual Meeting 2021, held April 10-15.

"While immunotherapy has revolutionized the treatment of cancer, the vast majority of patients do not experience a significant clinical response with such treatments," said study author Thomas Marron, MD, PhD, Assistant Director for Early Phase and Immunotherapy Trials at The Tisch Cancer Institute and Assistant Professor of Medicine (Hematology and Medical Oncology) at the Icahn School of Medicine at Mount Sinai. "Cancer vaccines, which typically combine tumor-specific targets that the immune system can learn to recognize and attack to prevent recurrence of cancer. The vaccine also contains an adjuvant that primes the immune system to maximize the efficacy."

To generate the personalized cancer vaccine, Dr. Marron and colleagues sequenced each patient's tumor and germline DNA and tumor RNA. They also identified the patient's tumor-specific target to help predict whether the patient's immune system would recognize the vaccine's targets.

The Mount Sinai computational pipeline, called OpenVax, allows the researchers to identify and prioritize immunogenic targets to synthesize and incorporate into the vaccine.

Following any standard cancer treatment such as surgery for solid tumors or bone marrow transplant for multiple myeloma, patients received 10 doses of the personalized vaccine over a six-month period. The vaccine was given with the immunostimulant, or adjuvant, poly-ICLC, which is "a synthetic, stabilized, double-stranded RNA capable of activating multiple innate immune receptors, making it the optimal adjuvant for inducing immune responses against tumor neoantigens," said study author Nina Bhardwaj, MD, PhD, Director of the Immunotherapy Program and the Ward-Coleman Chair in Cancer Research at The Tisch Cancer Institute at Mount Sinai.

"Most experimental personalized cancer vaccines are administered in the metastatic setting, but prior research indicates that immunotherapies tend to be more effective in patients who have less cancer spread," said Dr. Bhardwaj. "We have therefore developed a neoantigen vaccine that is administered after standard-of-care adjuvant therapy, such as surgery in solid tumors and bone marrow transplant in multiple myeloma, when patients have minimal—typically microscopic—residual disease. Our results demonstrate that the OpenVax pipeline is a viable approach to generate a safe, personalized cancer vaccine, which could potentially be used to treat a range of tumor types."

Before the vaccine, the trial participants statistically had a high chance of disease recurrence. Thirteen patients received the Mount Sinai team's vaccine: 10 had solid tumor diagnoses and 3 had multiple myeloma.

After a mean follow-up of 880 days, four patients still had no evidence of cancer, four were receiving subsequent lines of therapy, four had died, and one chose not to continue the trial. The vaccine was well tolerated, with roughly one-third of patients developing minor injection-site reactions.

A phase 1 trial's primary goal is to determine the safety of an experimental treatment, which was achieved in this trial. Researchers also saw early potential benefits of the vaccine after blood tests of one of the patients showed an immune response from the vaccine, and two other patients had robust response to immunotherapy afterward, results that are normal after being exposed to a cancer vaccine.

Since this trial's completion, Mount Sinai has opened or plans to open five other phase 1 trials testing OpenVax with other therapies in cancers that include glioblastoma, bladder cancer, prostate cancer, and myeloproliferative neoplasms, a blood cancer. This study was sponsored by the Parker Institute for Cancer Immunotherapy and The Tisch Cancer Institute.

About the Mount Sinai Health System

The Mount Sinai Health System is New York City's largest academic medical system, encompassing eight hospitals, a leading medical school, and a vast network of ambulatory practices throughout the greater New York region. Mount Sinai is a national and international source of unrivaled education, translational research and discovery, and collaborative clinical leadership ensuring that we deliver the highest quality care—from prevention to treatment of the most serious and complex human diseases. The Health System includes more than 7,200 physicians and features a robust and continually expanding network of multispecialty services, including more than 400 ambulatory practice locations throughout the five boroughs of New York City, Westchester, and Long Island. The Mount Sinai Hospital is ranked No. 14 on U.S. News & World Report's "Honor Roll" of the Top 20 Best Hospitals in the country and the Icahn School of Medicine as one of the Top 20 Best Medical Schools in country. Mount Sinai Health System hospitals are consistently ranked regionally by specialty and our physicians in the top 1% of all physicians nationally by U.S. News & World Report.

For more information, visit https://www.mountsinai.org or find Mount Sinai on Facebook, Twitter and YouTube.

Media Contact

Marlene Naanes, Mount Sinai Health System, 212-241-9200, [email protected]

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SOURCE Mount Sinai Health System

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