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  • Title: LncRNA TUG1 knockdown mitigates inflammatory injury induced by cigarette smoke extract in chronic obstructive pulmonary disease via miR-34c/BRD4 axis.
    Author: Song B, Wu S, Ye L, Jing Z, Cao J.
    Journal: Biosci Rep; 2020 Aug 19; ():. PubMed ID: 32812639.
    Abstract:
    Chronic obstructive pulmonary disease (COPD) is a type of respiratory disease. The dysregulation of long non-coding RNA (lncRNA) taurine upregulated gene 1 (TUG1) has been reported in diverse diseases. This study aimed to explore the functions and mechanism of TUG1 in COPD. The levels of TUG1 and BRD4 were significantly up-regulated, and the level of miR-34c was apparently down-regulated in COPD patients or CSE-treated BEAS-2B cells. TUG1 was verified to sponge to miR-34c, and BRD4 was validated as a target of miR-34c. TUG1 depletion or miR-34c overexpression promoted cell proliferation but restrained apoptosis, inflammatory response in CSE-treated BEAS-2B cells. MiR-34c inhibitor mitigated the inhibitory effect on cell proliferation and the promotion effects on cell apoptosis, inflammatory response in CSE-treated BEAS-2B cells induced by TUG1 silencing. Mechanistically, TUG1 modulated BRD4 expression in CSE-treated BEAS-2B cells by sponging miR-34c. TUG1 modulated BRD4 to regulate cell proliferation, cell apoptosis and inflammatory response in CSE-treated BEAS-2B cells by sponging miR-34c.
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