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Chinese Journal of Clinical Pharmacology and Therapeutics ›› 2022, Vol. 27 ›› Issue (2): 129-135.doi: 10.12092/j.issn.1009-2501.2022.02.002

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Effects of liquorice extract on cardiac fibroblasts fibrosis induced by TGF-β1 

NIU Pilian1, FAN Yongxin2, LU Furui1, ZHOU Xuezhang1, BAI Mingsheng1   

  1. 1College of Life Sciences, Ningxia University, Yinchuan 750021, Ningxia, China; 2Jilin University, Changchun 130000, Jilin, China
  • Received:2021-10-20 Revised:2022-01-14 Online:2022-02-26 Published:2022-03-09

Abstract: AIM: To investigate the effect of liquorice extract on TGF-β1-induced myocardial fibroblast (CFs) fibrosis.  METHODS: 10 ng/mL TGF-β1 induced CFs to establish myocardial fibrosis cell model. Fibrotic cells were treated with liquorice extract and the cell activity was detected by MTT assay. CCK-8 was used to detect the effect of liquorice extract on CFs proliferation. The expression of smooth muscle actin (α-SMA) was detected by immunofluorescence. Western blot was used to detect TGF-β1/Smad signaling pathway related proteins and p-Smad2, p-Smad3 expression levels. The mRNA expression levels of Smad2, Smad3 and Smad4 were detected by RT-PCR. RESULTS: Compared with the control group, there were statistically significant differences in cell activity (P<0.05). The cell proliferation rate of glycyrrhiza uralensis extract groups was significantly lower than that of TGF-β1 group (P<0.05). The expression levels of α-SMA and TGF-β1/Smad signaling pathway related proteins in 100 μg/mL liquorice extract were significantly lower than those in TGF-β1 group (P<0.05). CONCLUSION: Glycyrrhiza extract can improve the occurrence and development of TGF-β1-induced myocardial fibrosis, and its mechanism maybe related to the inhibition of TGF-β1/Smad signaling pathway.

Key words: myocardial fibrosis, transforming growth factor-β1 (TGF-β1), TGF-β1/Smad signaling pathway, liquorice extract, cardiac fibroblasts (CFs) 

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