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Lung cancer is among the most common malignancies worldwide; however, the current understanding of its detailed mechanism remains limited. Long non‑coding RNAs (lncRNAs) were previously identified to serve significant roles in tumorigenesis. The present study aimed to investigate the role of a novel lncRNA, Fer‑1‑like family member 4 (FER1L4), in lung tumorigenesis. In the present study, it was demonstrated that the expression level of FER1L4 was significantly decreased in clinical lung cancer tissues and in cultured lung cancer cells, as evidenced by reverse transcription‑quantitative polymerase chain reaction analysis. Overexpression of FER1L4 in lung cancer cell lines A549 and 95D inhibited colony formation, cell proliferation and cell migration capacity, measured by colony formation assays, cell proliferation assays and Transwell assays, respectively. Overexpression of FER1L4 led to a reduction in the expression levels of phosphoinositide 3‑kinase (PI3K)/protein kinase B (Akt) in A549 and 95D cells, whereas, activation of PI3K/Akt signaling using a small molecular inhibitor of phosphatase and tensin homolog, reversed the inhibitory effects of FER1L4 on cell proliferation and metastasis. All of these results suggested that the lncRNA FER1L4 suppressed cell proliferation and metastasis by inhibiting the PI3K/Akt signaling pathway in lung cancer.

Long non‑coding RNA FER1L4 inhibits cell proliferation and metastasis through regulation of the PI3K/AKT signaling pathway in lung cancer cells