|Author||Bi, Mingjun ♦ Chen, Wei ♦ Yu, Hongmei ♦ Wang, Jinxiu ♦ Ding, Fang ♦ Tang, Dong Jing ♦ Tang, Cuiyan|
|Source||United States Department of Energy Office of Scientific and Technical Information|
|Subject Keyword||APPLIED LIFE SCIENCES ♦ CELL PROLIFERATION ♦ INHIBITION ♦ LUNGS ♦ NEOPLASMS|
|Abstract||MicroRNAs (miRNAs) play important roles in the pathogenesis of many types of cancers by negatively regulating gene expression at posttranscriptional level. Here, we identified that miR-543 is up-regulated in gefitinib-resistant non-small cell lung cancer (NSCLC) patients comparing gefitinib-sensitive ones. It promotes NSCLC cell proliferation by negatively regulates its target gene PTEN. In NSCLC cell lines, CCK-8 proliferation assay indicated that the cell proliferation is promoted by miR-543 mimics. Transwell assay showed that miR-543 mimics promotes the invasion and migration of NSCLC cells. Luciferase assays confirmed that miR-543 directly binds to the 3'untranslated region of PTEN, and western blotting showed that miR-543 suppresses the expression of PTEN at the protein level. This study indicates that miR-543 promotes proliferation and invasion of NSCLC cell lines by PTEN. The miR-543 may represent a potential therapeutic target for gefitinib-resistant NSCLC intervention. - Highlights: • miR-543 is highly expressed in gefitinib-resistant NSCLC. • miR-543 promotes the proliferation and invasion of NSCLC cells. • miR-543 inhibitors inhibits the proliferation and invasion of NSCLC cells. • miR-543 targets 3′ UTR of PTEN in NSCLC cells. • miR-543 inhibits PTEN in NSCLC cells.|
|Learning Resource Type||Article|
|Publisher Place||United States|
|Journal||Biochemical and Biophysical Research Communications|
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