Long non‐coding RNA colon cancer‐associated transcript‐1 regulates tumor cell proliferation and invasion of non‐small‐cell lung cancer through suppressing miR‐152

Aim Lung cancer serves as one of the most common cancers in the world, and approximately 50% of non‐small‐cell lung cancer (NSCLC) patients are found to be aged >70 when diagnosed. In this study, we aimed to explore the effect of long non‐coding RNAs colon cancer‐associated transcript‐1 (CCAT1) in NSCLC. Methods A total of 72 clinical samples from older NSCLC patients were collected for analysis. The relative mRNA level of CCAT1 was detected through real‐time polymerase chain reaction. Overall survival of NSCLC patients was detected through Kaplan–Meier survival analysis. MTT assays were used to detect cell proliferation. Cell invasion was determined by transwell assay. Protein levels were detected through western blot. Results CCAT1 expression levels significantly increased in NSCLC tumor tissues and were associated with poor overall survival of NSCLC patients. CCAT1 promotes cell proliferation, cell invasion and epithelial–mesenchymal transition of NSCLC cell lines. CCAT1 binds with miR‐152, and the effect of si‐CCAT1 in NSCLC cell proliferation, cell invasion and epithelial–mesenchymal transition was partially reversed by anti‐miR‐152. Conclusions Long non‐coding RNA CCAT1 regulates tumor cell proliferation and invasion in NSCLC through suppressing miR‐152. Geriatr Gerontol Int 2020; ••: ••–••.