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Health & Wellness

Ground-Breaking Cancer Research is in Your Backyard

Sep. 20, 2022

UC Health Conducts Nation’s First FLASH Radiotherapy Trial in Humans.


The Queen City is solidifying its position as a top leader in cancer research thanks to the University of Cincinnati Medical Center Proton Therapy Center located in Liberty Township, with the first FLASH proton therapy trial being completed in humans.

The FAST-01 Clinical Trial: All Eyes on UC Health

FAST-01 (FeAsibility Study of FLASH Radiotherapy for the Treatment of Symptomatic Bone Metastases) is the first human clinical trial of FLASH therapy—placing UC Health and Cincinnati Children’s at the forefront of this pioneering work.

The trial has been led by John C. Breneman, MD, medical director of the Proton Therapy Center and professor emeritus in the Department of Radiation Oncology at UC College of Medicine. Emily Daugherty, MD, UC Health radiation oncologist, assistant professor of radiation oncology at UC College of Medicine and lead sub-investigator for the trial, and Anthony Mascia, PhD, director of medical physics and adjunct assistant professor of radiation oncology at UC College of Medicine, support the trial as well.

What is FLASH Radiotherapy?

FLASH therapy, an experimental treatment modality delivering radiation therapy at ultra-high dose rates in typically less than one second, may be more than 400 times faster compared to conventional radiation therapy. While the concept of ultra-high dose rate radiation delivery has been studied for many years, UC Health is pioneering this new trial focused on humans.

“We are the only health system conducting this trial in the world,” Dr. Daugherty says. “It is astounding and important for people to know that this ground-breaking work is happening right here in Cincinnati, right in their backyard.”

Launched in November 2020, the FAST-01 trial met its enrollment target of 10 participants with bone metastases in the extremities to evaluate clinical workflow feasibility and treatment-related side effects. Doctors confirm that this revolutionary treatment has been effective and continue to track patients enrolled in the trial to ensure that the effectiveness continues. 

Testing FLASH Radiotherapy on Bone Metastases

Dr. Breneman says the primary goal of the first trial period was to study the safety of the therapy in humans, with effectiveness of treatment as a secondary goal. Currently, Dr. Breneman and his team are working with the U.S. Food and Drug Administration (FDA) to prepare for the second trial–a follow-up study of the experimental treatment modality delivering radiation to different parts of the body. The first trial focused on delivering radiation to bone metastases in the arms and legs.

“The second trial is working its way through the regulatory agencies right now. And we hope to open the study in August or September,” Dr. Breneman says.

While the treatment modality is still in the experimental phase, it is possible the technology will be used routinely in patient care by 2027, adds Dr. Breneman. Researchers are able to perform this groundbreaking work in Cincinnati because of our Proton Therapy Center—the $24 million, one-of-a-kind research facility is a partnership among UC Health and Cincinnati Children’s Hospital Medical Center. It includes a fully operational proton treatment room dedicated exclusively for research along with integrated laboratories.

“We are conducting revolutionary research that is not being performed anywhere else in the world. And we hope to change lives,” Dr. Breneman says.

Making Progress: Approval of the FAST-02 Clinical Trial

On May 28, 2021, the FDA granted Investigational New Drug (IND) approval to UC Health and Cincinnati Children’s Hospital Medical Center to proceed with a second clinical trial of FLASH therapy. 

"We are thrilled to receive FDA approval to move forward with this second clinical trial of FLASH therapy," Dr. Breneman says. "It has the potential to become a routine part of cancer care, and we are excited to be at the forefront of this research."

What Is Proton Therapy?

Proton therapy is a type of radiation therapy that uses protons to treat tumors. It is just as effective as traditional radiation therapy, with one major advantage: greater precision. Proton radiation can attack the tumor but avoid healthy tissues and organs nearby. This reduces the risk of treatment-related side effects and long-term complications. Doctors may use proton therapy alone, or they may combine it with other treatment methods, such as traditional radiation therapy, surgery, chemotherapy and immunotherapy.

What Is a Proton?

A proton is a particle found within the nucleus of every atom. Protons have unique properties that make them very effective in treating patients with tumors. For example, they can be precisely controlled to match the location and shape of the tumor. They do not deliver the entire radiation dose all at once as they travel through the body. Instead, they enter the body at a very high speed, initially delivering low levels of radiation. As they travel, they slow down. When the protons hit the tumor, they deliver the maximum tumor-killing radiation dose, then completely stop. No radiation is delivered past the tumor site. This lowers the impact to normal tissues surrounding the tumor and reduces the risk of treatment-related side effects.

Bone Cancer Facts

About 3,910 new cases of bone cancer are diagnosed annually, and bone cancer will result in 2,100 deaths each year, according to the American Cancer Society. This includes cancers in both children and adults.