Tel Aviv University researchers made a groundbreaking discovery in the fight against brain cancer by preventing glioblastoma from spreading, according to a press release.Glioblastoma is an aggressive type of cancer that can occur in the brain or spinal cord.The researchers managed to achieve the breakthrough by detecting a failure in the brain's immune system that can be used against the deadly cancer. The failure in question stems from a protein called P-Selectin (SELP), which researchers used to restore the normal activity of the brain, blocking the spread of the cancer. Prof. Ronit Satchi-Fainaro of Tel Aviv University's Sackler Faculty of Medicine led the international research team in the endeavor. Researchers also compared healthy brain tissues with other tissues infected with glioblastoma. "We examined the interactions between the immune cells in the brain and the glioblastoma cells in tumors that were recently removed from patients' brains," said Fainaro.Researchers studied which proteins are secreted when the microglia immune cells (the cells of the immune system) meet with the glioblastoma cells, as cells are able to communicate with one another through proteins. Their studies led to the SELP protein, which was revealed to be disrupting brain immune system functions and boosting glioblastoma tumors.Fainaro believes that the study may have therapeutic implications, as there is the possibility that SELP could be used to treat pain associated with sickle cell anemia.