Journal: Journal for Immunotherapy of Cancer
Article Title: Type I interferon suppresses tumor growth through activating the STAT3-granzyme B pathway in tumor-infiltrating cytotoxic T lymphocytes
doi: 10.1186/s40425-019-0635-8
Figure Lengend Snippet: IFNα and IFNβ activate STAT3 to up-regulate Gzmb expression in CTLs. a . the tumor-specific resting 2/20 CTLs were cultured in the presence of IFNα and IFNβ, respectively, and analyzed by Western blotting analysis for the indicated STATs. b . The protein band intensities of pSTAT1 and pSTAT3 as shown in A were quantified using NIH image J and normalized as the ratio over the intensities of STAT1 and STAT3, respectively. Column: Mean; Bar: SD. c . Resting 2/20 CTLs were treated with recombinant IFNα and IFNβ, respectively, in the absence (control) or presence of pSTAT1 (+Fludarabine, 10 μM, top panel) and pSTAT3 (+STATTIC, 5 μM, bottom panel) inhibitors, respectively, for 24 h. Cells were analyzed by qPCR for Gzmb expression level
Article Snippet: Fluorescent dye-conjugated antibodies that are specific for CD45, CD4, CD8, and Zombie violet were obtained from Biolegend (San Diego, CA). pSTAT1 inhibitor Fludarabine [ ] and pSTAT3 inhibitor Stattic [ ] were obtained from Santa Cruz.
Techniques: Expressing, Cell Culture, Western Blot, Recombinant, Control