Genetically inhibiting GPR4 suppressed the proliferation, migration of CRC cancer cells.
(a–b) GPR4 expression in mRNA (a), protein (b) level of different colorectal cancer cell lines. (c) CCK-8 cell proliferation assay of control or GPR4-silenced HCT116 and HT29 cells in pH 6.8 culture medium. (d) Colony formation assay of control or GPR4-silenced HCT116 and HT29 cells in pH 6.8 culture medium. Statistical of colony formation assay were presented in the right panel. (e) Cell invasion assay of control or GPR4-silenced HCT116 and HT29 cells in pH 6.8 culture medium. Statistical of cell invasion assay were presented in the right panel. (f) Wound healing assay of control or GPR4-silenced HCT116 and HT29 cells in pH 6.8 culture medium. Statistical of wound healing assay were presented in the right panel (g) 3D on-top growth assay of control or GPR4-silenced HCT116 and HT29 cells in pH 6.8 culture medium. Scale bars, 100 μm. Differences between the control and other groups in (c) were analysed by one-way ANOVA test (* P < .05; ** P < .01; *** P < .001). Differences between the groups in (d, e and f) were analysed by unpaired Student's t-test (* P < .05; ** P < .01; *** P < .001).