Objective

In the management of hepatocellular carcinoma (HCC), traditional Chinese medicine represents as a significant complementary and alternative therapy. Jiedu Recipe (JR), a Chinese herbal remedy, has been shown to prolong overall survival time and decrease HCC recurrence and metastasis rates. This study aimed to uncover the mechanism of JR in HCC treatment.

Methods

The components of JR were detected by liquid chromatography-mass spectrometry. The potential anti-HCC mechanism of JR was first screened by network pharmacology and microarray messenger ribonucleic acid (mRNA) chip assays, followed by experimental validation on human HCC cells (SMMC-7721 and Huh7) in vitro and a nude mouse subcutaneous transplantation model of HCC in vivo. 3-(4,5-Dimethyl-2-thiazolyl)-2,5-diphenyl-2-H-tetrazolium bromide, thiazolyl blue tetrazolium bromide, wound healing, along with transwell assays were applied respectively to assess HCC cell characteristics of proliferation, migration and invasion under hypoxic setting. Image-iT? Hypoxia Reagent was added to reveal hypoxic conditions. A stem cell sphere formation assay was used to detect stemness. Epithelial-mesenchymal transition (EMT) markers like E-cadherin, vimentin, α-smooth muscle actin and pluripotent transcription factors including nanog homeobox, octamer-binding transcription factor 4, sex determining region Y box protein 2 were analyzed by Western blotting and real-time polymerase chain reaction. Western blot was performed to ascertain the anti-HCC effect of JR under hypoxia involves the Wnt/β-catenin pathway.

Results

According to network pharmacology and mRNA microarray chip analysis, JR may potentially act on hypoxia and inhibit the Wnt/β-catenin pathway. Our findings showed that JR strongly decreased hypoxia, and obviously suppressed HCC cell features of proliferation, migration and invasion. Moreover, the hypoxia-induced increases in EMT and stemness marker expression in HCC cells were inhibited by JR. Further results based on the co-administration of JR and an agonist (LiCl) or inhibitor (IWR-1-endo) verified that JR suppressed hypoxia-induced cancer stem-like properties in HCC by blocking the Wnt/β-catenin pathway.

Conclusion

JR exerts potent anti-HCC effects by inhibiting cancer stemness via abating the Wnt/β-catenin pathway under hypoxic conditions.

Key words: Jiedu Recipe, Chinese medicine, Hepatocellular carcinoma, Hypoxia, Cancer stemness, Wnt/β-catenin pathway