Brain Tumors Fuel Growth by Eating Sugar

Immune cells within brain tumors could be actively promoting their own growth by consuming fructose, a recent study suggests. Researchers have identified this sugar metabolism as a key driver of immune suppression in glioblastoma, an aggressive brain cancer. The study, published in Proceedings of the National Academy of Sciences, found that microglia, a type of immune cell in the brain, uniquely utilize a fructose transporter called GLUT5.

Experiments using mouse models demonstrated that when this fructose transporter was removed, tumors showed significantly reduced growth. This was due to a stronger immune response, including better recognition of tumor cells by T-cells. These findings indicate that interfering with fructose metabolism in microglia could be a promising strategy to enhance immunotherapy effectiveness and improve treatment outcomes for glioblastoma patients.