Whole Brain Radiation Therapy With Oxygen, With or Without RSR13, in Women With Brain Metastases From Breast Cancer

RSR13 (efaproxiral) is a radiation sensitizer that has shown positive results in a Phase 3, randomized clinical trial of patients with brain metastases. Of 111 eligible breast cancer patients with brain metastases in that trial, 59 patients who received RSR13 prior to radiation therapy had a median survival time that was twice as long as the 52 patients who did not receive RSR13 prior to radiation therapy. RSR13 (efaproxiral) is an experimental drug that increases the amount of oxygen released from blood into the tissues. It is well known that certain types of cancer tumors, including those in brain metastases, lack oxygen. Lack of oxygen in a tumor can reduce the effect of radiation therapy (RT). RSR13 may increase the oxygen level in brain tumors so that radiation therapy works better. This study will enroll up to 360 women with brain metastases from breast cancer, and will evaluate if whole brain radiation therapy given with RSR13 will have a better treatment effect than whole brain radiation therapy alone. RSR13 will be infused intravenously (IV) through a central catheter placed in a central vein. Women randomized (assigned) to receive RSR13, therefore, will need to have a central catheter placed for treatment unless one is already in place.

Sex

Female

Minimum age

18 Years

Inclusion Criteria:

* Adult women with brain metastases from breast cancer
* Minimum KPS of 70

Exclusion Criteria:

* Previous treatment for brain metastases, including brain surgery and any form of radiation to the brain