Journal: JCI Insight
Article Title: Ablation of T cell–associated PD-1H enhances functionality and promotes adoptive immunotherapy
doi: 10.1172/jci.insight.148247
Figure Lengend Snippet: ( A ) The expression of PD-1H on activated WT OT-I cells was analyzed by flow cytometry. ( B ) CFSE-labeled EG7 or B16-OVA tumor cells were coincubated with activated PKO or WT OT-I cells at the different effector/target (E:T) ratios for 4 hours. Cells were stained with DAPI and analyzed by flow cytometry. Data are representative of 3 independent experiments with mean ± SEM. * P < 0.05, *** P < 0.001, and **** P < 0.0001 (2-way ANOVA). ( C ) CRISPR/Cas9 efficiently disrupted the expression of PD-1H on CD8 + T cells. PD-1H expression was analyzed in the GFP + gate by flow cytometry. ( D ) The killing activity of sgRNA OT-I cells on EG7 cells in vitro was analyzed by CFSE/DAPI staining. EG7-bearing mice ( n = 4 for the control group; n = 5 per group) received an i.v. injection of OT-I cells or PBS. ( E ) Tumor growth was monitored from day 6, and tumor weight at day 16 is shown. NC, negative control; Ctrl, control. Data are representative of 2 independent experiments with mean ± SEM. P values by 2-tailed unpaired t test (right graph in E ) and 2-way ANOVA (left graph in E ). * P < 0.05; ** P < 0.01; *** P < 0.001; **** P < 0.0001.
Article Snippet: The Cas9 expression construct LentiCRISPR v2 (Addgene 52961) was modified by adding an GFP sequence to replace the puro sequence (LentiCRISPR-GFP).
Techniques: Expressing, Flow Cytometry, Labeling, Staining, CRISPR, Activity Assay, In Vitro, Control, Injection, Negative Control