Objective: To investigate the effects of miR-141-3p on proliferation and migration of gastric cancer cells and nuclear factor-κB (NF-κB) signaling pathway. Methods: Human gastric cancer cell line BGC-823 was cultured, and miR-141-3p mimetic (miR-141-3p mimics) was transfected into BGC-823 cells by lipofection. The miR-141-3p overexpressed BGC was constructed. Real-time fluorescence quantitative polymerase chain reaction (qRT-PCR) was used to detect the transfection effect. The proliferation of BGC-823 cells was determined by 3-(4, 5-Dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide (MTT) assay. Transwell assay was used to detect the effect of miR-141-3p on BGC-823 cell migration. The expressions of NF-κB p65, p-IKK-α and p-IKB-α protein in NF-κB signaling pathway were detected by western blot. Results: Compared with the control group and the negative control group, the expression level of miR-141-3p in BGC-823 cells of the miR-141-3p group was (2.39±0.27), which was higher than (1.00±0.09) of the control group and (1.01±0.10) of the negative control group (P<0.05). The number of migrating cells in the miR-141-3p group was (47.64±5.65), which was lower than (106.22±12.14) in the control group and (110.40±12.26) in the negative control group (P<0.05). The expression levels of NF-κB p65, p-IKK-α and p-IKB-α protein in BGC-823 cells were down-regulated (P<0.05). Conclusion: MiR-141-3p can inhibit the proliferation and migration of human gastric cancer BGC-823 cells, which may be related to the inhibition of NF-κB signaling pathway activation.
目的： 探讨miR－141－3p对胃癌细胞增殖和迁移及核转录因子κB(NF－κB)信号通路的影响。 方法： 培养人胃癌细胞株BGC－823，采用脂质体转染技术将miR－141－3p模拟物(miR－141－3p mimics)转染至BGC－823细胞构建miR－141－3p过表达的BGC－823细胞株。实时荧光定量聚合酶链式反应(qRT－PCR)检测转染效果，噻唑蓝比色法检测miR－141－3p对BGC－823细胞增殖的影响，Transwell实验检测miR－141－3p对BGC－823细胞迁移的影响，Western blot法检测NF－κB信号通路相关NF－κB p65、p－IKK－α和p－IKB－α蛋白的表达情况。 结果： 与对照组和阴性对照组比较，miR－141－3p组BGC－823细胞中miR－141－3p的表达水平为2.39±0.27，高于对照组(1.00±0.09)和阴性对照组(1.01±0.10)，差异均有统计学意义(均P<0.05)；过表达miR－141－3p后，miR－141－3p组的迁移细胞数为(47.64±5.65)个，低于对照组[(106.22±12.14)个]和阴性对照组[(110.40±12.26)个]，差异均有统计学意义(均P<0.05)；BGC－823细胞中NF－κB p65、p－IKK－α和p－IKB－α蛋白的表达水平下调(P<0.05)。 结论： miR－141－3p可抑制人胃癌BGC－823细胞的增殖和迁移，其作用机制可能与抑制NF－κB信号通路的激活有关。.
Keywords: BGC-823 cells; Gastric neoplasms; MiR-141-3p; Migration; NF-κB signaling pathway; Proliferation.