Journal: bioRxiv
Article Title: Adaptive anti-tumor immunity is orchestrated by a population of CCL5-producing tissue-resident NK cells
doi: 10.1101/2021.05.27.445981
Figure Lengend Snippet: a: Amount of tumor infiltration NK cells per g tumor was determined in untreated EMT6-HER2 and B16-HER2 tumors. b: Amount of trNK cells per g tumor was determined in untreated EMT6-HER2 and B16-HER2 tumors. c: Intra-tumoral CCL5 concentration was determined by ELISA and normalized to total protein in EMT6-HER2 and B16-HER2 tumor lysates. d: Wildtype (WT) mice were engrafted with 1 mio EMT6-HER2 (i.m.) or 0.5 mio B16-HER2 (s.c.). Mice were treated with AdV5-IL12 on day 7, 9, 11 and 14 or day 11, 13, 15 and 18 (tumor size 30–70 mm 3 ), respectively. NK cells were depleted using anti-AsialoGM1 and anti-NK1.1 antibody every 4-5 days starting one day prior adenoviral therapy. Tumor volume on day 25 post tumor inoculation is shown. e: Mice were treated with AdV5-IL12 and AdV5-CCL5 on day 11, 13, 15 and 18 (tumor size 30–70 mm 3 ) after B16-HER2 inoculation as indicated: Tumor growth and Kaplan-Meier survival curves are shown (n > 15 mice per condition). f: Mice were engrafted with 1 mio EMT6-HER2 (i.m.) or 0.5 Mio B16-HER2 (s.c.). Starting from day 7 or 11 (tumor size 30–70 mm 3 ), mice were treated with 1.5×10 8 PFU of HER2-targeted and shielded adenoviral vectors (p.t.) encoding for IL-12 on day 7/11, 9/13 and 11/15. On day 12/16 post inoculation, tumors were isolated, embedded in OCT and analyzed by multiparameter immuno-fluorescence microscopy. Visualization of odds ratios and p values for changes in cell-cell type interactions between EMT6-HER2 versus B16-HER2 focusing on interaction including CD8 T cells and NK cells. g-k: Mice were engrafted with 0.5 mio B16-HER2 (s.c.). Mice were treated with AdV5-IL12 and/or AdV5-CCL5 on day 11, 13 and 15 (tumor size 30–70 mm 3 ). On day 16 post inoculation, tumors were isolated and single cell suspensions were analyzed by flow cytometry or embedded in OCT and analyzed by multiparameter immuno-fluorescence microscopy. g-h: Number of cDC1s (CD11c+, F4/80-, Ly-6G-, MHCII+, CD103+, CD11b low ) and PD-L1 and CD80 expressing cDC1s, respectively. i: Interaction count per mm of CD8 T cells in close proximity to DCs. Representative IF pictures are showing AdV5-IL12 + AdV5-CCL5 treated tumors (MHCII: red, CD11c: green, CD8: blue). White arrows are showing CD8 T cells (CD45+, CD8+) neighboring DCs (CD45+, CD11c+, F4/80-). j: Ratio of PD-1, CD25 and CD69 expression on the CD8 T cell cluster in close (<50 μm) or distant (>50 μm) proximity to DC cluster. k: Proportion of granzyme B+ of CD8 T cells (CD3+, CD4-, NKp46-CD19-). l: Batf3 knockout mice (lacking cDC1s) were engrafted with 0.5 mio B16-HER2 (s.c.). Mice were treated with AdV5-IL12 and/or AdV5-CCL5. Tumor growth and Kaplan-Meier survival curves are shown. #x002A;p < 0.05, **p < 0.01, ***p < 0.001, ****p < 0.0001. Error bar values represent SEM. For survival analysis, p values were computed using the Log Rank test. Two-way ANOVA was used to compare tumor growth curves. See also Figure Supplementary Fig. S5.
Article Snippet: The supernatant was collected after 6 days of co-culture to assess IFNγ and CCL5 levels using a Human IFNγ ELISA Set (BD OptEIA, 555142) and ELISA MAX™ Deluxe Set Human CCL5 (Biolegend, 440804), respectively, according to the manufacturers’ instructions.
Techniques: Concentration Assay, Enzyme-linked Immunosorbent Assay, Isolation, Fluorescence, Microscopy, Flow Cytometry, Expressing, Knock-Out