Fig. 6: Immunohistochemical and tunnel assay of tumor tissue.

Tumors were collected from Kappas-299 xenograft mice treated with saline (top), NC CAR T (middle) or CD30 CAR T (bottom). Formalin-fixed, paraffin-embedded tumor sections were consecutively cut and stained. (bar of G-CSF, TNF-α, INF-γ is 50 μm, a bar of the tunnel is 20 μm).