Fig. 4
![Fig. 4](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs40425-019-0642-9/MediaObjects/40425_2019_642_Fig4_HTML.png)
NKG2D-BBz CAR-T cells showed effective and persistent antitumor activity against xenografts formed by U-251MG cells in mice. a B-NDG mice were injected with 1 × 106 stable luciferase transfected U-251MG cells subcutaneously and imaged 7 days prior to T cell infusion. After mice received T cells treatment, photographs were taken serially at indicated time. b Comparison of tumor bioluminescent signal among the indicated groups at different time points