CircCHD2/miR-200b-3p/HLF Axis Promotes Liver Cirrhosis

Area of Science:

• Molecular Biology
• Hepatology
• RNA Biology

Background:

• Liver cirrhosis (LC) progression is linked to hepatic stellate cell (HSC) activation.
• The role of circular RNAs (circRNAs) in LC pathogenesis remains largely unexplored.

Purpose of the Study:

• To investigate the function of circCHD2 in HSC activation and its potential role in liver cirrhosis.
• To elucidate the molecular mechanism involving circCHD2, miR-200b-3p, and HLF in liver cirrhosis.

Main Methods:

• Established a cell model of liver cirrhosis using LX-2 cells stimulated with TGF-β1.
• Quantified circCHD2, miR-200b-3p, and HLF expression using qPCR.
• Assessed cell proliferation via CCK-8, EdU, and colony formation assays.
• Evaluated HSC activation markers (α-SMA, Col1A1) using qPCR and Western blot.
• Verified molecular interactions using luciferase reporter assays.

Main Results:

• CircCHD2 expression was upregulated in LC patients and TGF-β1-treated LX-2 cells.
• Knockdown of circCHD2 inhibited TGF-β1-induced HSC proliferation and downregulated α-SMA and Col1A1.
• CircCHD2 acted as a sponge for miR-200b-3p, targeting HLF.
• MiR-200b-3p inhibition reversed the suppressive effects of circCHD2 knockdown.
• Overexpression of HLF counteracted the effects of miR-200b-3p upregulation.

Conclusions:

• The circCHD2/miR-200b-3p/HLF axis plays a critical role in liver cirrhosis progression.
• Downregulation of this axis can alleviate liver cirrhosis.
• CircCHD2 presents a potential therapeutic target for liver cirrhosis treatment.