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Article

RNA-binding motif protein 5 negatively regulates the activity of Wnt/β-catenin signaling in cigarette smoke-induced alveolar epithelial injury

  • Authors:
    • Yu-Qiu Hao
    • Zhen-Zhong Su
    • Xue-Jiao Lv
    • Ping Li
    • Peng Gao
    • Chen Wang
    • Yue Bai
    • Jie Zhang
  • View Affiliations / Copyright

    Affiliations: Department of Respiratory Medicine, The Second Affiliated Hospital of Jilin University, Chuangchun, Jilin 130041, P.R. China, Department of Paediatrics, The Second Affiliated Hospital of Jilin University, Chuangchun, Jilin 130041, P.R. China
  • Pages: 2438-2444
    |
    Published online on: March 3, 2015
       https://doi.org/10.3892/or.2015.3828
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Abstract

Cigarette smoking is closely associated with various respiratory diseases. Oxidants and carcinogens in cigarettes are reported to induce various airway epithelial injuries. However, the underlying mechanisms remain unclear. The aims of the present study were to determine the involvement of RNA-binding motif protein 5 (RBM5) and Wnt/β-catenin signaling in cigarette smoke-induced alveolar epithelial injury, as well as the interaction between both. A549 cells were treated with cigarette smoke extract (CSE). The MTT assay was used to assess the effects of CSE on cell viability. The levels of RBM5 and Wnt/β-catenin/GSK3β were detected by semi-quantitative reverse transcription-polymerase chain reaction (RT-PCR) and western blot analysis. A luciferase assay was used to assess the activity of β-catenin/T-cell factor (TCF) signaling. The results revealed that CSE inhibited A549 cell viability in both a dose- and time-dependent manner. Cytosolic and nuclear β-catenin levels were significantly increased following CSE treatment, compared with those in the control cells (P<0.05). The luciferase activity in CSE-exposed cells transfected with the TCF luciferase reporter wild-type plasmid (pGL3-OT) was significantly greater than that in cells without CSE exposure (33,167±3,085 vs. 19,978±1,916, respectively, P<0.05). Both the mRNA and protein levels of RBM5 in the CSE-treated cells were significantly reduced compared to the levels in the controls (all P<0.05). The overexpression of RBM5 inhibited Wnt/β-catenin signaling in the A549 cells, while silencing of RBM5 enhanced Wnt/β-catenin signaling. The β-catenin/TCF signaling inhibitor ICG-001 had no apparent effect on the RBM5 levels. Downregulation of RBM5 and activation of Wnt/β-catenin signaling are involved in CSE-induced alveolar epithelial injury. RBM5 acts as an upstream molecule that negatively regulates the activity of Wnt/β-catenin signaling.
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Copy and paste a formatted citation
Spandidos Publications style
Hao Y, Su Z, Lv X, Li P, Gao P, Wang C, Bai Y and Zhang J: RNA-binding motif protein 5 negatively regulates the activity of Wnt/β-catenin signaling in cigarette smoke-induced alveolar epithelial injury. Oncol Rep 33: 2438-2444, 2015.
APA
Hao, Y., Su, Z., Lv, X., Li, P., Gao, P., Wang, C. ... Zhang, J. (2015). RNA-binding motif protein 5 negatively regulates the activity of Wnt/β-catenin signaling in cigarette smoke-induced alveolar epithelial injury. Oncology Reports, 33, 2438-2444. https://doi.org/10.3892/or.2015.3828
MLA
Hao, Y., Su, Z., Lv, X., Li, P., Gao, P., Wang, C., Bai, Y., Zhang, J."RNA-binding motif protein 5 negatively regulates the activity of Wnt/β-catenin signaling in cigarette smoke-induced alveolar epithelial injury". Oncology Reports 33.5 (2015): 2438-2444.
Chicago
Hao, Y., Su, Z., Lv, X., Li, P., Gao, P., Wang, C., Bai, Y., Zhang, J."RNA-binding motif protein 5 negatively regulates the activity of Wnt/β-catenin signaling in cigarette smoke-induced alveolar epithelial injury". Oncology Reports 33, no. 5 (2015): 2438-2444. https://doi.org/10.3892/or.2015.3828
Copy and paste a formatted citation
x
Spandidos Publications style
Hao Y, Su Z, Lv X, Li P, Gao P, Wang C, Bai Y and Zhang J: RNA-binding motif protein 5 negatively regulates the activity of Wnt/β-catenin signaling in cigarette smoke-induced alveolar epithelial injury. Oncol Rep 33: 2438-2444, 2015.
APA
Hao, Y., Su, Z., Lv, X., Li, P., Gao, P., Wang, C. ... Zhang, J. (2015). RNA-binding motif protein 5 negatively regulates the activity of Wnt/β-catenin signaling in cigarette smoke-induced alveolar epithelial injury. Oncology Reports, 33, 2438-2444. https://doi.org/10.3892/or.2015.3828
MLA
Hao, Y., Su, Z., Lv, X., Li, P., Gao, P., Wang, C., Bai, Y., Zhang, J."RNA-binding motif protein 5 negatively regulates the activity of Wnt/β-catenin signaling in cigarette smoke-induced alveolar epithelial injury". Oncology Reports 33.5 (2015): 2438-2444.
Chicago
Hao, Y., Su, Z., Lv, X., Li, P., Gao, P., Wang, C., Bai, Y., Zhang, J."RNA-binding motif protein 5 negatively regulates the activity of Wnt/β-catenin signaling in cigarette smoke-induced alveolar epithelial injury". Oncology Reports 33, no. 5 (2015): 2438-2444. https://doi.org/10.3892/or.2015.3828
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