Endoglin expression was variable among glioma cell lines, with the highest expression levels in three LTC, A172, U87MG, and T98G, which was comparable with the levels of hCMEC and serially passaged CD31+ cells isolated from glioblastoma tissues; endoglin mRNA expression in GIC was low (Fig. 3a). The gene discussed is PECAM1; the disease is glioma.