Fig. 4: MTHFR promotes GC cell proliferation.

a MTT assay of cell proliferation at 24, 48, and 72 h after transfection with MTHFR siRNAs. b Flow cytometry of cell cycle, visualized by PI staining. c Cell apoptosis by flow cytometry, visualized using Annexin-V/PI staining. d Colony formation assay 14 days after transfection. e Effect of MTHFR knockdown on cell cycle-related proteins. All the results are shown as mean±SD. n = 3, *p < 0.05, **p < 0.01, Student’s t test.