Impact of RAGE ablation in tumor microenvironment on glioma growth. A, Kaplan-Meier plots (top panel) and tumor luciferase activity (lower panel) in wild-type (WT) and RAGE knockout (Ager−/−) mice implanted with either intracranial GL261 or KLuc gliomas (n=7-8 mice/group, MS: median survival). B, Despite improvement in survival, tumor size (two weeks after implantation) was similar in WT and Ager−/− mice. Cross sections through the largest tumor area were used for size calculations (n=4 mice/group ± SD). C, Except for increased central necrosis in the GL261 tumors in Ager−/− mice, tumor histology and invasion pattern was similar in both strains. Experimental results are representative of three separate experiments.