document: cell transplantation, the treatment was repeated two times (every 7 days). In Group 5 (n = 10), the mice received TrQβ@b-3WJsiEGFR Let-7g (5 μM) via CED infusion at 9 A.M. Seven days after U87MG cell transplantation, the treatment was repeated two times (every 7 days). In Group 6 (n = 10), the mice received rQβ@b-3WJsiEGFR Let-7g (5 μM) via CED infusion at 9 A.M. followed by 2 Gy X-ray irradiation at 2 P.M. the following day. Seven days after U87MG cell transplantation, the treatment was