Figure 9. (A) Protein levels of GPR55 were detected by western-blotting in HepG2 cells, respectively. (B) Protein levels of GPR55 were detected by western-blotting in 97H cells, respectively. (C) Determination of cell viability in HepG2 cells. (D) Determination of cell viability in 97H cells. (E) Transwell assay in HepG2 cells. (F) Transwell assay in 97H cells. (G) Immunofluorescence staining of GPR55 and PD-1. (H) Immunofluorescence staining of GPR55 and PD-L1. N = 3, ***P < 0.01, t-test.