UCA1 promoted cell proliferation and cell invasion of GC. (A–B) UCA1 expression was detected by transfection with si‐NC, si‐UCA1‐1, and si‐UCA1‐2 into SGC‐7901 cells or transfection with pcDNA or pcDNA‐UCA1 into MKN‐45 cells. (C–D) A MTT assay was performed by transfection with si‐NC and si‐UCA1 into SGC‐7901 cells or transfection with pcDNA and pcDNA‐UCA1 into MKN‐45 cells after cell transfection at 1, 2, 3, 4, and 5 days. (E–F) A cell colony formation assay was performed by transfection with si‐NC and si‐UCA1 into SGC‐7901 cells or transfection with pcDNA and pcDNA‐UCA1 into MKN‐45 cells. (G–H) A cell invasion assay were performed and the cell number was analyzed by transfection with si‐NC and si‐UCA1 into SGC‐7901 cells or transfection with pcDNA and pcDNA‐UCA1 into MKN‐45 cells. The data are presented as the mean ± SD from three independent experiments. *P < 0.05; GC, gastric cancer.