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Whatís New in Breast Cancer Brain Metastases Treatment

by Colleen Fleiss on April 20, 2018 at 2:17 AM
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Whatís New in Breast Cancer Brain Metastases Treatment

Researchers found the kind of immune response the body is staging against triple negative breast cancer that has spread to the brain. The study was conducted by University of North Carolina Lineberger Comprehensive Cancer Center researchers.

In a preliminary study presented at the American Association for Cancer Research Annual Meeting 2018 in Chicago, researchers hope they can use these findings to improve patient responses to drugs that work by unleashing the immune system against cancer. "Patients with brain metastases do a lot worse clinically," said the study's first author Benjamin Vincent, MD, UNC Lineberger member and assistant professor in the UNC School of Medicine. "They are sicker, and they die earlier with their disease than patients with metastases everywhere else. What makes the biology of brain metastases and immune responses in the brain different from other sites of disease was our question. We'd love to figure that out so we can target it therapeutically."

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For the study, researchers analyzed samples of triple negative breast cancer that had spread to the brain along with matched primary tumors. They genetically sequenced the tumors to understand what types of immune cells were present in the tumors, which they could distinguish using specific genetic signatures that are specific to each immune cell. However, the immune cells present were of a type that typically has corresponded to response to treatments called immune checkpoint inhibitors, which are drugs that "remove the brakes" on immune cells to allow them to attack tumors. The researchers believe that if they can increase the numbers of immune cells that are able to get to the brain metastases, they would see better response to checkpoint inhibitor therapies.

"This research is still early, but we think that if we can find a way to get immune cells there, they will be responsive there - they will do their job," Vincent said. "The primary problem is not that the environment around the tumor will not allow the immune cells to work. The problem is that the immune cells aren't getting there appropriately. We have to look for strategies to get immune cells in and treat with immunomodulatory agents for peak effect."

Source: Eurekalert
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