|
KMID : 0578320140370090664
|
|
Molecules and Cells
2014 Volume.37 No. 9 p.664 ~ p.671
|
|
|
MicroRNA-217 Functions as a Tumour Suppressor Gene and Correlates with Cell Resistance to Cisplatin in Lung Cancer
|
|
Guo Jun Hua
Feng Zhi Jun
Huang Zhi’ang
Wang Hong Yan
Lu Wu Jie
|
|
|
Abstract
|
|
|
|
MiR-217 can function as an oncogene or a tumour suppressor gene depending on cell type. However, the function of miR-217 in lung cancer remains unclear to date. This study aims to evaluate the function of miR-217 in lung cancer and investigate its effect on the sensitivity of lung cancer cells to cisplatin. The expression of miR-217 was detected in 100 patients by real-time PCR. The effects of miR-217 overexpression on the proliferation, apoptosis, migration and invasion of SPC-A-1 and A549 cells were investigated. The target gene of miR-217 was predicted by Targetscan online software, screened by dual luciferase reporter gene assay and demonstrated by Western blot. Finally, the effects of miR-217 up-regulation on the sensitivity of A549 cells to cisplatin were determined. The expression of miR-217 was significantly lower in lung cancer tissues than in noncancerous tissues (p < 0.001). The overexpression of miR-217 significantly inhibited the proliferation, migration and invasion as well as promoted the apoptosis of lung cancer cells by targeting KRAS. The up-regulation of miR-217 enhanced the sensitivity of SPC-A-1 and A549 cells to cisplatin. In conclusion, miR-217 suppresses tumour development in lung cancer by targeting KRAS and enhances cell sensitivity to cisplatin. Our results encourage researchers to use cisplatin in combination with miR-217 to treat lung cancer. This regime might lead to low-dose cisplatin application and cisplatin side-effect reduction.
|
|
|
KEYWORD
|
|
|
cisplatin, KRAS, lung cancer, miR-217, tumour suppressor
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
  
|