Journal: Clinical & Translational Immunology
Article Title: Dual CD47 and PD‐L1 blockade elicits anti‐tumor immunity by intratumoral CD8 + T cells
doi: 10.1002/cti2.70014
Figure Lengend Snippet: CD47 × PD‐L1 BisAb therapy enhances tumor‐resident CD8 + TIL formation and function. (a–j) AT3‐OVA‐bearing mice were treated with isotype or BisAb before being assessed on Day 28 post inoculation. (a) Representative contour plots and (b) frequency of CD69 and CD62L expression by CD44 hi CD8 + T cells in the spleen. Shaded boxes in (a) represent the frequency of CD69 + CD62L − T cells. (c) Representative contour plots and (d) frequency of T EM (CD127 + CD62L − ), T CM (CD127 + CD62L + ) and LLEC (CD127 − CD62L − ) CD44 hi CD8 + T cells in the spleen. (e) Representative contour plots and (f) frequency of CD69 and CD62L expression by SIINFEKL + CD8 + T cells in the tumor. Shaded boxes in (e) represent the frequency of CD69 + CD62L − T cells. (g) Representative contour plots and (h) frequency of CD69 and CD103 expression by SIINFEKL + CD8 + T cells in the tumor. Enumeration of (i) CD44 hi CD8 + and (j) SIINFEKL + CD69 − , CD69 + CD103 − and CD69 + CD103 + TIL. (k, l) Intratumoral CD8 + T cells were stimulated with PMA/Ionomycin Day 18 post‐inoculation. (k) Representative contour plots of IFNγ expression by CD69 + CD103 + TIL. (l) Frequency of IFNγ expression by CD69 − T CIRC , CD69 + CD103 − and CD69 + CD103 + TIL. Enumeration of cells in the tumor are expressed per mm 3 . The combined data of two independent experiments with a total of 9 or 10 mice (b, d, f, g, h) and 4–6 mice (j) per group is shown. ns, P > 0.05, ** P ≤ 0.01, *** P ≤ 0.001, **** P ≤ 0.0001, Mann–Whitney U ‐test. Bars represent mean ± SEM, symbols represent individual mice.
Article Snippet: Mice used in this study weighed an average of 20 g. Mice were treated with 40 mg kg −1 mouse CD47 × PD‐L1 bispecific antibody (Pfizer Inc. ); 40 mg kg −1 mouse IgG2a isotype control (Leica Biosystems, Wetzlar, Germany) or 10 mg kg −1 mouse anti‐PD‐L1 (Clone 10F.6G2, Bio X Cell, Lebanon, USA) via intraperitoneal injection on days 10, 13, 16, 20 and 24 after tumor inoculation.
Techniques: Expressing, MANN-WHITNEY