TROP2 is upregulated in human glioblastoma and is a prognostic indicator for glioblastoma patients. (A) Representative immunohistochemical assays of TROP2 expression in human glioblastoma (right) and adjacent normal brain tissue (left). (B) Immunohistochemical analyses of TROP2 expression in 8 paired samples of glioblastoma and normal brain tissue, P<0.001. (C) Western blot analyses were performed to detect TROP2 expression in human normal astroglial cells (SVGP12), four glioblastoma cell lines (A172, LN-229, U-87 MG and U-118 MG), normal brain tissues and glioblastoma tissues. (D and E) Kaplan-Meier analysis of progression-free survival using data from the Tumor Glioma-kawaguchi-50 database and Tumor Glioma-French-284 database with the log-rank test P-values indicated. TROP2, trophoblast cell surface antigen 2.