Groundbreaking Stanford cancer treatment receives important FDA designation

brain scan

A promising Stanford Medicine treatment for deadly pediatric brain and spinal cord cancers received a Regenerative Medicine Advanced Therapy (RMAT) designation from the U.S. Food and Drug Administration (FDA) to expedite the FDA approval process. By expediting approval, more children will be able to benefit from the treatment sooner.

The RMAT designation is open to regenerative medicine therapies, such as cell therapy. Researchers must go through a selective admissions process and meet specific criteria, including providing evidence that the therapy can improve patient survival or meet other unmet medical needs for a serious or life-threatening disease or condition. Since the program began in 2017, 128 therapies have been selected for the designation out of the 279 projects invited to apply.

The designation gives researchers access to regulatory experts to refine and improve their research, making the FDA approval process more efficient. Experts may work with researchers on creating flexible, innovative clinical trial designs, such as comparing several investigational drugs; identifying an adequate study population and sample size; and determining appropriate endpoints for various clinical development phases.

Crystal Mackall, MD, Center Director for the Parker Institute for Cancer Immunotherapy at Stanford and co-leader of the Stanford Cancer Institute Cancer Immunotherapy Program, and Stanford Cancer Institute member Michelle Monje, MD, PhD, the Milan Gambhir Professor in Pediatric Neuro-Oncology and professor of neurology at Stanford Medicine, are leading an ongoing clinical trial to evaluate the therapy’s safety and efficacy. Interim results were published in Nature, and Stanford Medicine published an in-depth article about the treatment.

570A5328.jpg

Image credit: Douglas Peck / Lucile Packard Foundation for Children’s Health

The therapy uses chimeric antigen receptor (CAR)-T cells, immune cells extracted from a patient’s body that are engineered to target a specific marker on tumor cells, to treat a deadly group of pediatric brain and spinal cord tumors known as diffuse midline gliomas. This group includes a brain cancer called diffuse intrinsic pontine glioma (DIPG), which has a median survival of eleven months, with only 10% of patients surviving for more than two years after diagnosis. 

Monje says, “DIPG is among the worst imaginable childhood cancers.”

While effective against blood cancers, it has been challenging to make an effective CAR-T cell therapy for other cancer types. This study is among the first successes of CAR-T cell therapy in treating solid tumors. The therapy shrank children’s brain tumors and restored neurologic function in several patients. One participant had a complete response, meaning all detectable traces of the brain tumor disappeared, and he is healthy four years after his diagnosis. 

Mackall says, “This is an incredibly promising treatment for a devastating disease. The FDA RMAT designation will allow us to bring this potentially lifesaving treatment to more patients by helping us get it to market sooner, hopefully giving these children a chance at survival they wouldn’t have had otherwise.”

November 2024
Katie Shumake