Figure 3.
miR-100 regulates the expression of CXCR7 in vitro. (A) RT-qPCR analysis of the expression of miR-100 in gastric cancer cell line (BGC823) after miR-100 mimic, inhibitor, and negative control miRNA transfection. (B) MTT assay to determine the level of cell proliferation in gastric cancer cell line (BGC823) after miR-100 mimic, inhibitor, and negative control miRNA transfection. (C) Putative miR-100-binding sequence within the 3′-UTR of CXCR7 mRNA. (D) Luciferase gene reporter gene assays were performed to verify the relationship between miR-100 and CXCR7. (E) RT-qPCR and (F) Western blot analysis of the expression of CXCR7 in gastric cancer cell line (BGC823) and normal gastric epithelial cell line (GES-1). (G) RT-qPCR analysis of the expression of CXCR7 in gastric cancer cell line (BGC823) after miR-100 mimic, inhibitor, and negative control miRNA transfection. (H) RT-qPCR analysis of the expression of CXCR7 in gastric cancer cell line (BGC823) after CXCR7-sepcific siRNA and negative control siRNA transfection. (I) MTT assay to determine the level of cell proliferation in gastric cancer cell line (BGC823) after CXCR7-sepcific siRNA and negative control siRNA transfection (NS: Not significance, *P<0.05, **P<0.01, ***P<0.001). miR-100, microRNA-100; CXCR7, Chemokine (CXC motif) receptor 7; siRNA, small-interfering RNA; OD490, optical density at 490 nm.