Fig. 5. Immunohistochemistry of the tumor microenvironment in GBM specimens before and after CART-EGFRvIII infusion. Immunohistochemistry of the tumor.

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Presentation transcript:

Fig. 5. Immunohistochemistry of the tumor microenvironment in GBM specimens before and after CART-EGFRvIII infusion. Immunohistochemistry of the tumor microenvironment in GBM specimens before and after CART-EGFRvIII infusion. (A) T cell infiltration and phenotyping in pre– and post–CART-EGFRvIII infusion specimens from subject 216; pre-infusion specimens are from day −81, whereas post-infusion specimens are from day +13, relative to CART-EGFRvIII infusion at day 0. Top row shows low-power magnification of CD3 immunohistochemical stain, with high-power magnification as inset; ISH specifically for CAR sequences. T cell phenotyping is shown with ISH for IFN-γ and with immunohistochemistry for CD8, granzyme B (GRZMB), and the IL-2 receptor α chain (CD25). Scale bars, 4 mm (low-power graphs) and 200 μm (high-power graphs). (B) In situ assessment of immunosuppressive molecules in the tumor microenvironment is shown before and after CART-EGFRvIII infusion in patient 216, including IDO1, PD-L1, FoxP3, TDO, IL-10, and TGFβ. (C) Summary table with heat map of T cell infiltration, CART-EGFRvIII trafficking, and tumor microenvironment in seven subjects before and after treatment with CART-EGFRvIII. NP, not performed; 0, not detectable. Date indicates day of specimen relative to CART-EGFRvIII infusion, which was designated as day 0. Donald M. O’Rourke et al., Sci Transl Med 2017;9:eaaa0984 Copyright © 2017 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works