Acta Anatomica Sinica ›› 2018, Vol. 49 ›› Issue (5): 630-635.doi: 10.16098/j.issn.0529-1356.2018.05.011

• Cancer Biology • Previous Articles     Next Articles

Effects of microRNA-145 on the migration and invasion of lung cancer cell line A549 through mitogen-activated protein kinase and phosphatidylinositol 3 kinase/protein-serine-threonine kinase pathways

XIA Ying-chen1 ZHEN Jie2 YE Fei 2* GUO Hui-ming2 ZHANG Li-juan2   

  1. 1. Medicina Science Department, Suzhou Vocational Health College, Jiangsu Suzhou 215009, China; 2. Department of Thoracic Surgery, Qidong People’s Hospital, Jiangsu, Qidong 226200, China
  • Received:2017-10-31 Revised:2017-11-17 Online:2018-10-06 Published:2018-10-06
  • Contact: YE Fei E-mail:xiayingchen46@163.com

Abstract:

Objective To study the effect of microRNA-145(miR-145) on the migration and invasion and on the mitogen-activated protein kinase(MAPK) and phosphatiolylinositol 3 kinase/protein serine threonine kinase(PI3K/AKT) pathways in non-small cell lung cancer A549 cells. Methods The A549 cells were divided into miR-145 mimics, negative mimics (miR-NC), antago miR-145 and antago-miR control (antago-NC) groups. Transwell migration experiment and matrix matrigel invasion experiment were used to detect the influence of miR-145 on the migration and invasion ability of human non-small cell lung cancer A549. Western blotting method analyzed the effect of miR-145 on MAPK and PI3K/AKT pathways. In addition, the inhibitors of extracellular regulated protein kinase(ERK) and AKT pathways were used to detect the changes of the cell migration and invasion in A549 cell lines. Results The amount of miR-145 mimics group through transwell chambers was significantly less than the miR-NC group (175.33±23.67). The miR-145 mimics group had a lower number of cells through matrigel matrix than miR-NC group (153.33±22.33), P<0.05. When the expression of miR-145 was inhibited, the number of cells in antago-NC group through Transwell chambers or matrigel matrix were significantly less than the antago miR-145 group (245.00±23.00) and (185.00±12.00), P<0.05. The above results proved that miR-145 inhibited cell migration and invasion ability of A549 cells. The transfection of miR-145 mimics respectively inhibited the phosphorylation of ERK1/2, AKT (ser-473) and AKT (thr-308) about 90%, 78% and 73%, while the transfection of antago miR-145 promoted the phosphorylation of ERK1/2, AKT (ser-473) and AKT (thr-308) and rose up to 115%, 125%and 129%. The migration and invasion ability of A549 cells decreased when the activation of MAPK pathway and PI3K/AKT pathways were inhibited. Conclusion miR-145 regulates lung cancer A549 cell migration and invasion through MAPK and PI3K/AKT pathways, which may provide reliable research results for the treatment of lung cancer.

Key words: Lung cancer, A549, miR-145, Migration, Invasion, Real-time PCR, Western blotting