MS4A7 and glioblastoma: To determine the roles of GAMs-derived MS4A7-s in GBM tumorigenesis in mice bearing intracranial xenografts model, U87MG cells were co-injected with control, MS4A7-l OE or MS4A7-s OE HMC3 cells into the brains of BALB/c immunodeficient (SCID) mice (n = 7 in each group) (Fig. 4A).