Regulation of MALAT1 expression by TDP43 controls the migration and invasion of non-small cell lung cancer cells in vitro

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Lung cancer is one kind of the malignant tumor with high mortality. And non-small cell lung cancer is the main subtype of lung cancer. And the proteins of CLCA family (CLCA1, CLCA2 and CLCA4) played an inhibitory role in the occurrence and development of multiple types of tumors. However, the effect of CLCA4 on non-small cell lung cancer cells remains unclear. In our study, we used the lentivirus to establish the overexpressed CLCA4 A549 cells. Next, the CCK-8 and clone formation assays were performed to detect the changes of proliferation of A549 cells. The wound healing and transwell assays were performed to determine the changing of the migration and invasion of A549 cells. Then gemcitabine was used to treat these cells and the CCK-8, wound healing and transwell assays were carried out to detect the effect of the combination of gemcitabine and the overexpression of CLCA4 on the proliferation, migration and invasion of A549 cells. After the overexpression of CLCA4, the clone formation and mobility of A549 cells was enhanced. Furthermore, the overexpression of CLCA4 induced the apoptosis of A549 cells and promoted the expression of apoptosis related proteins. The combination of gemcitabine and the overexpression of CLCA4 further suppressed the proliferation, migration and invasion of A549 cells. CLCA4 inhibited the proliferation, migration and invasion of non-small cell lung cancer cells. CLCA4 also strengthened the sensitivity of non-small cell lung cancer cells for gemcitabine.


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