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The linc00152 Controls Cell Cycle Progression by Regulating CCND1 in 16HBE Cells Malignantly Transformed by Cigarette Smoke Extract.

Smoking is one of the major environmental risk factors for lung cancer. In recent years, the role of long-chain non-coding RNAs (lncRNA) in chemical carcinogenesis has attracted extensive research attention. In this study, we treated human bronchial epithelial cells with cigarette smoke extract (CSE) at a dose of 2 μg/mL to establish a malignantly transformed cellular model (16HBE-M). Screening of lncRNAs highly expressed in transformed cells via differential analysis revealed a crucial role of linc00152 in CSE-induced malignant transformation. The linc00152 serum level in cigarette smoke extract-exposed individuals was increased in a dose-dependent manner and its high expression associated with metastasis and proliferation of lung cancer tissue. In malignantly transformed 16HBE-M cells, linc00152 was involved in regulation of cell adhesion, epithelial transition and other malignant phenotypes, which in turn, affected in vivo metastasis. Interference with linc00152 expression led to G1/S arrest and inhibition of proliferation of 16HBE-M and H1299 cells. Furthermore, linc00152 promoted cyclin D1 expression and G1/S transition by functioning as an endogenous competitive RNA targeting miR-193b. Our collective findings supported a critical regulatory role of linc00152 in cell cycle alterations and abnormal proliferation in CSE-induced malignant transformation of human bronchial epithelial cells.

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