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Article

Suppression of collagen synthesis by Dicer gene silencing in hepatic stellate cells

  • Authors:
    • Fujun Yu
    • Zhuo Lin
    • Jianjian Zheng
    • Shenmeng Gao
    • Zhongqiu Lu
    • Peihong Dong
  • View Affiliations / Copyright

    Affiliations: Department of Infectious Diseases, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, P.R. China, Wenzhou Key Laboratory of Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, P.R. China, Laboratory of Internal Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, P.R. China, Emergency Department, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, P.R. China
  • Pages: 707-714
    |
    Published online on: December 16, 2013
       https://doi.org/10.3892/mmr.2013.1866
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Abstract

MicroRNAs (miRNAs) have emerged as important mediators of hepatic stellate cells (HSCs) and are pivotal in the pathogenesis of liver fibrosis. Dicer, the key enzyme in the RNA interference (RNAi) pathway, is involved in cutting precursor miRNAs to functionally mature forms. Emerging evidence has demonstrated that Dicer expression is dysregulated in embryo development and tumors. In the present study, we aimed to address whether Dicer expression was correlated with the activity of HSCs. We used a recombinant lentivirus to generate short hairpin RNAs (shRNAs) targeting Dicer. The mRNA and protein expression of Dicer was effectively inhibited by three pairs of Dicer shRNA vectors, of which the shRNA1 vector exhibited the strongest inhibitory effect. The shRNA1 vector demonstrated a marked inhibitory effect on the activity of HSCs, resulting in the reduction of cell proliferation and the decrease of fibrosis-related genes, including type Ⅰ collagen (Col1A1), α-smooth muscle actin (α-SMA) and tissue inhibitor of metalloproteinases (TIMP). The mRNA expression of Col1A1, α-SMA and TIMP were decreased by 60, 56 and 49%, respectively. The protein expression was reduced by 56, 52 and 42%, respectively. Additionally, the inhibition of Dicer resulted in a decrease of miR-138, -143, -140 and -122 levels, of which miR-138 exhibited the strongest decline. The firefly luciferase reporter experiments and RT-PCR indicated that phosphatase and tension homolog deleted on chromosome 10 (PTEN), Ras GTPase activating-like protein 1 (RASAL1), acyl-CoA synthetase long-chain family member 1 (ACSL1) and p27 3' untranslated region sequences were targeted by miR-138, -143, -140 and -122, respectively. Taken together, the present study contributes important new findings for the role of Dicer‑mediated miRNA processing in collagen synthesis of HSCs, which may serve as a foundation for RNAi study of liver fibrosis in vivo.
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Copy and paste a formatted citation
Spandidos Publications style
Yu F, Lin Z, Zheng J, Gao S, Lu Z and Dong P: Suppression of collagen synthesis by Dicer gene silencing in hepatic stellate cells. Mol Med Rep 9: 707-714, 2014.
APA
Yu, F., Lin, Z., Zheng, J., Gao, S., Lu, Z., & Dong, P. (2014). Suppression of collagen synthesis by Dicer gene silencing in hepatic stellate cells. Molecular Medicine Reports, 9, 707-714. https://doi.org/10.3892/mmr.2013.1866
MLA
Yu, F., Lin, Z., Zheng, J., Gao, S., Lu, Z., Dong, P."Suppression of collagen synthesis by Dicer gene silencing in hepatic stellate cells". Molecular Medicine Reports 9.2 (2014): 707-714.
Chicago
Yu, F., Lin, Z., Zheng, J., Gao, S., Lu, Z., Dong, P."Suppression of collagen synthesis by Dicer gene silencing in hepatic stellate cells". Molecular Medicine Reports 9, no. 2 (2014): 707-714. https://doi.org/10.3892/mmr.2013.1866
Copy and paste a formatted citation
x
Spandidos Publications style
Yu F, Lin Z, Zheng J, Gao S, Lu Z and Dong P: Suppression of collagen synthesis by Dicer gene silencing in hepatic stellate cells. Mol Med Rep 9: 707-714, 2014.
APA
Yu, F., Lin, Z., Zheng, J., Gao, S., Lu, Z., & Dong, P. (2014). Suppression of collagen synthesis by Dicer gene silencing in hepatic stellate cells. Molecular Medicine Reports, 9, 707-714. https://doi.org/10.3892/mmr.2013.1866
MLA
Yu, F., Lin, Z., Zheng, J., Gao, S., Lu, Z., Dong, P."Suppression of collagen synthesis by Dicer gene silencing in hepatic stellate cells". Molecular Medicine Reports 9.2 (2014): 707-714.
Chicago
Yu, F., Lin, Z., Zheng, J., Gao, S., Lu, Z., Dong, P."Suppression of collagen synthesis by Dicer gene silencing in hepatic stellate cells". Molecular Medicine Reports 9, no. 2 (2014): 707-714. https://doi.org/10.3892/mmr.2013.1866
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