Natural product andrographolide alleviated APAP-induced liver fibrosis by activating Nrf2 antioxidant pathway.

Abstract

As a well-known analgesic drug, acetaminophen (APAP) is commonly used to relieve pain for patients with chronic painful diseases. Our previous study has shown that long-term ingestion of APAP caused liver fibrosis in mice. This study further investigated the critical role of nuclear factor erythroid 2-related factor 2 (Nrf2) in regulating APAP-induced liver fibrosis in mice and the anti-fibrotic effect of natural compound andrographolide (Andro). Our results showed that hepatic collagen deposition and hepatic stellate cells (HSCs) activation induced by APAP were more serious in Nrf2 knock-out mice than in normal wild-type mice. Andro reduced HSCs activation in vitro, and also decreased hepatic collagen deposition and HSCs activation induced by APAP in mice. Andro alleviated liver oxidative stress injury induced by APAP in mice and reduced cellular formation of reactive oxygen species (ROS) in HSCs. Andro enhanced Nrf2 nuclear translocation and increased the expression of Nrf2 downstream antioxidant genes both in vitro and in vivo. Furthermore, the Andro-provided protection against APAP-induced liver fibrosis was diminished in Nrf2 knock-out mice. In summary, Nrf2 is critically involved in preventing liver fibrosis induced by long-term administration of APAP in mice, and Andro alleviates APAP-induced liver fibrosis by attenuating liver oxidative stress injury via inducing Nrf2 activation. This study points out the potential application of Andro in the treatment of liver fibrosis in clinic.

• Authors: Hongyu Yan, Zhenlin Huang, Qingyun Bai, Yuchen Sheng, Zhanxia Hao, Zhengtao Wang, Lili Ji
• Journal: Toxicology (Toxicology) Vol. 396-397 Pg. 1-12 (03 01 2018) ISSN: 1879-3185 [Electronic] Ireland
• PMID: 29355602 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: Copyright © 2018 Elsevier B.V. All rights reserved.

Chemical References

• Antioxidants
• Diterpenes
• NF-E2-Related Factor 2
• Nfe2l2 protein, mouse
• Reactive Oxygen Species
• Acetaminophen
• andrographolide
• Collagen
• Hydroxyproline

Topics

• Acetaminophen (toxicity)
• Animals
• Antioxidants (metabolism)
• Collagen (metabolism)
• Diterpenes (therapeutic use)
• Hepatic Stellate Cells (drug effects)
• Hydroxyproline (metabolism)
• Lipid Peroxidation (drug effects)
• Liver (metabolism)
• Liver Cirrhosis (chemically induced, genetics, prevention & control)
• Male
• Mice
• Mice, Inbred C57BL
• Mice, Knockout
• NF-E2-Related Factor 2 (drug effects, genetics)
• Protein Transport (drug effects)
• Reactive Oxygen Species (metabolism)