Abstract
Background: Liver cirrhosis is a consequence of various chronic liver conditions and may lead to liver failure and cancer. Huangqi Decoction (HQD) is a Traditional Chinese Medicine (TCM) effective for treating liver conditions, including cirrhosis. Therefore, both the active ingredients and the pharmacological actions of HQD deserve further exploration. The active components and pharmacological actions of HQD in preventing and treating liver cirrhosis were investigated using network pharmacology. The actions of the principal active ingredient, Mairin, were investigated empirically.
Methods: Using network pharmacology, the critical components of HQD were identified from multiple databases, and UPLC screening and targets were investigated using Swiss Target Prediction. Targets associated with liver cirrhosis were identified using the GeneCards database. GO and KEGG enrichment analysis of targets that overlapped between HQD and cirrhosis were analyzed in DAVID, and a “component-target-pathway” network for HQD was created in Cytoscape 3.7.2. The biological functions of the key active component, Mairin, were investigated using in silico docking, cell experiments, and evaluation in a carbon-tetrachloride (CCl4)-induced mouse model of liver cirrhosis. CCK-8 and F-actin assays were used to measure cell viability and hepatic stellate cell (HSC) activation, respectively; fibrosis was measured by histological and immunohistochemical evaluations, and the levels of the cirrhosis-related protein α-SMA and predicted essential target proteins in the PI3KAKT, NFκB-IκBα, and NLRP3-IL18 pathways were determined by western blotting.
Results: Fourteen active HQD components, 72 targets, and 10 pathways common to HQD and cirrhosis were identified. Network analysis indicated the association of Mairin with most targets and with inflammation through the PI3K/Akt, NF-κB, and NLRP3 pathways. Dose-dependent reductions in the activation and proliferation of LX-2 cells after Mairin treatment were observed. Mairin reversed the histopathological changes in the livers of cirrhosis model mice. Mairin also significantly reduced the α-SMA, NF-κB, IκBα, NLRP3, and IL-18 protein levels while increasing those of p- PI3K and p-Akt, suggesting that Mairin mitigates liver cirrhosis through modulation of the PI3KAKT, NFκB-IκBα, and NLRP3-IL18 pathways.
Conclusion: Using a comprehensive investigative process involving network pharmacology, bioinformatics, and experimental verification, it was found that Mairin, an active component of HQD, may be useful for developing specific treatments for preventing and treating liver cirrhosis.
Graphical Abstract
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