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ISSN 1001-5256 (Print)
ISSN 2097-3497 (Online)
CN 22-1108/R
Volume 39 Issue 12
Dec.  2023
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Article Navigation >  Journal of Clinical Hepatology  > 2023  >  39(12): 2845-2850

Mechanism of microRNA-223-3p inhibiting hepatic stellate cell activation by targeting microtubule-associated protein 1B

DOI: 10.3969/j.issn.1001-5256.2023.12.015

  • Department of Infectious Diseases，Huashan Hospital，Fudan University；Shanghai Key Laboratory of Infectious Diseases and Biosafety Emergency Response；National Medical Center for Infectious Diseases，Shanghai 200040，China

Research funding:

National Natural Science Fundation of China (8200033704);

National Natural Science Fundation of China (81770565)

More Information
  • Corresponding author: LI Ning， lining_hs@fudan.edu.cn （ORCID： 0000-0002-4375-2857）
  • Received Date: 2022-12-09
  • Accepted Date: 2023-05-19
  • Published Date: 2023-12-12
    Abstract
  •   Objective  To investigate the effect of microRNA-223-3p （miR-223-3p） on hepatic stellate cell （HSC） activation and its mechanism.  Methods  Human HSC LX2 cells were selected for the study， and LX2 cells were stimulated by TGF-β to establish a model of HSC activation； quantitative real-time PCR was used to measure the change in the expression level of miR-223-3p during HSC activation. After LX2 cells were transfected with miR-223-3p mimic， quantitative real-time PCR， Western blot， and immunofluorescence assay were used to clarify the regulatory effect of miR-223-3p on HSC activation， and dual-luciferase reporter assay was used to verify the association between miR-223-3p and the target gene MAP1B. After LX2 cells were transfected with MAP1B siRNA， Western blot was used to clarify the influence of inhibiting MAP1B expression on HSC activation； after LX2 cells were transfected with miR-223-3p， quantitative real-time PCR and Western blot were used to verify the regulatory effect of miR-223-3p on MAP1B. The independent-samples t test was used for comparison of continuous data between two groups.  Results  HSC in the activated state had a significant reduction in the expression level of miR-223-3p compared with those in the resting state （t=9.12， P<0.001）. Overexpression of miR-223-3p inhibited the mRNA and protein expression levels of the markers for HSC activation alpha-smooth muscle actin and collagen type Ⅰ （mRNA expression： t=8.35 and 12.23， both P<0.01； protein expression： t=16.24 and 20.90， both P<0.001）. The dual-luciferase reporter assay confirmed that MAP1B was a potential target gene of miR-223-3p. Compared with the control group， LX2 cells with miR-223-3p overexpression had significant reductions in the mRNA and protein expression levels of MAP1B （mRNA expression： t=5.95， P<0.01； protein expression： t=11.12， P<0.001）.  Conclusion  This study shows that miR-223-3p can inhibit HSC activation by targeting MAP1B.

     

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