Journal: bioRxiv
Article Title: Engineering CAR-Vδ2 T cells to boost persistence and anti-tumor function
doi: 10.64898/2026.04.13.717612
Figure Lengend Snippet: a, Schematic of Fas88 receptor and expected downstream events. b, Schematic of γ-retroviral vector encoding Fas88. c, Representative overlay histogram of surface Fas expression in transduced (NGFR+) and untransduced (NGFR-) population in Fas88-modified Vδ2 T cells. d, Bar graph showing % apoptotic cells (Annexin V+ cells) upon exposure to soluble Fas ligand for 24 hrs (mean ± S.E. n=5). e, Line graph showing GFP induction in Jurkat-NFκB reporter cell line with either ΔFas or Fas88 modification upon exposure to soluble Fas ligand for 24 hrs at indicated concentration. (n=3, technical replicate). f, Expression of indicated proteins with or without exposure to soluble Fas ligand for 1 hr by Western blot. g, Results of 9-day coculture experiments against NALM6. Line graphs showing target cell fold change (left), CAR(+) cell fold change (middle) and %NGFR(+) cells (right) over time, and bar graphs showing Net area (baseline = 1) of tumor fold change (left) and CAR(+) fold change (right) from day 0 to day 9 (mean ± S.E. n=5). h,i, Results from in vivo experiments in NALM6 xenograft mouse model (n=6 in no treatment and 19BBz, n=5 in 19BBz+Fas88 and mbIL-18/19BBz+ΔFas). h, Tumor progression (top) and Vδ2 T cell expansion (bottom) in individual mice over time detected by either CBG bioluminescence or AkaLuc bioluminescence, respectively. i, Overall animal survival in each experimental group. j, Schematic of CFPAC-1 in vivo experiments (n=8 in tumor only, n=7 in NT, PBBz, PBBz+Fas88, and mbIL-18/PBBz+ΔFas). k, Line graphs showing tumor volume in each treatment group over time. l, Overall mouse survival in each experimental group. Statistical differences are calculated by Two-way ANOVA with Sidak’s multiple comparison (d), One-way ANOVA with Tukey’s multiple comparison (g), or the log-rank test (i,l). ✱✱ p ≤ 0.01, ✱✱✱ p ≤ 0.001, ✱✱✱✱ p ≤ 0.0001, ns; non-significant.
Article Snippet: 293T (human embryonic kidney cell line), NALM6 (pre-B-ALL cell line), CFPAC-1 (pancreatic ductal adenocarcinoma), CCRF-CEM (T-ALL) were obtained from the American Type Culture Collection (Rockville, MD), and BV173 (B-cell precursor leukemia) from Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures GmbH (Braunschweig, Germany).
Techniques: Retroviral, Plasmid Preparation, Expressing, Modification, Concentration Assay, Western Blot, In Vivo, Comparison