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Salvianolic acid A preconditioning confers protection against concanavalin A-induced liver injury through SIRT1-mediated repression of p66shc in mice.
Abstract Salvianolic acid A (SalA) is a phenolic carboxylic acid derivative extracted from Salvia miltiorrhiza. It has many biological and pharmaceutical activities. The purpose of this study was to investigate the effect of SalA on concanavalin A (ConA)-induced acute hepatic injury in Kunming mice and to explore the role of SIRT1 in such an effect. The results showed that in vivo pretreatment with SalA significantly reduced ConA-induced elevation in serum alanine transaminase (ALT) and aspartate transaminase (AST) activities and decreased levels of the hepatotoxic cytokines such as interferon-gamma (IFN-γ) and t...
Source: Toxicology and Applied Pharmacology - August 28, 2013 Category: Toxicology Authors: Xu X, Hu Y, Zhai X, Lin M, Chen Z, Tian X, Zhang F, Gao D, Ma X, Lv L, Yao J Tags: Toxicol Appl Pharmacol Source Type: research

Hepatocyte-protective effect of nectandrin B, a nutmeg lignan, against oxidative stress: Role of Nrf2 activation through ERK phosphorylation and AMPK-dependent inhibition of GSK-3 β.
This study investigated the hepatocyte-protective effect of nectandrin B against tert-butylhydroperoxide-induced oxidative injury and the underlying molecular mechanism. The cell viability assay revealed that nectandrin B prevents apoptosis stimulated by tert-butylhydroperoxide in both HepG2 cells and primary mouse hepatocytes. Nectandrin B also attenuated ROS production and restored the depleted glutathione level. Real-time PCR and immunoblot analyses showed that the expression of glutamate-cysteine ligase, an enzyme responsible for the glutathione biosynthesis, was induced by nectandrin B, indicating its indirect antioxi...
Source: Toxicology and Applied Pharmacology - August 6, 2016 Category: Toxicology Authors: Song JS, Kim EK, Choi YW, Oh WK, Kim YM Tags: Toxicol Appl Pharmacol Source Type: research

Dihydroartemisinin protects against alcoholic liver injury through alleviating hepatocyte steatosis in a farnesoid X receptor-dependent manner.
This study was aimed to explore the impact of DHA on ALD and further elaborate the underlying mechanisms. Gain- or loss-of-function analyses of FXR were applied in both in vivo and in vitro studies. Results demonstrated that DHA rescued FXR expression and activity in alcoholic rat livers. DHA also reduced serodiagnostic markers of liver injury, including aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase, and lactate dehydrogenase. DHA improved alcohol-induced liver histological lesions, expression of inflammation genes, and inflammatory cell infiltration. In addition, DHA not only attenuated hyperl...
Source: Toxicology and Applied Pharmacology - December 5, 2016 Category: Toxicology Authors: Xu W, Lu C, Yao L, Zhang F, Shao J, Zheng S Tags: Toxicol Appl Pharmacol Source Type: research

Yangonin protects against cholestasis and hepatotoxity via activation of farnesoid X receptor in vivo and in vitro.
Abstract Cholestasis is a clinical syndrome with systemic and intrahepatic accumulation of excessive toxic bile acids that ultimately cause hepatobiliary injury. Recently obeticholic acid (OCA) which is a farnesoid X receptor (FXR) agonist was approved by FDA to treat cholestatic liver diseases, which provided us a newly therapeutic strategy against cholestasis. The purpose of the current study is to screen novel FXR agonists and verify the anti-cholestasis effect of yangonin in vivo and in vitro. The computational strategy of two-dimensional virtual screening was used to search for new FXR agonists, and dual-luci...
Source: Toxicology and Applied Pharmacology - April 13, 2018 Category: Toxicology Authors: Gao X, Fu T, Wang C, Ning C, Liu K, Liu Z, Sun H, Ma X, Huo X, Yang X, Zou M, Meng Q Tags: Toxicol Appl Pharmacol Source Type: research

Exendin-4, a glucagon-like peptide-1 receptor agonist, reduces hepatic steatosis and endoplasmic reticulum stress by inducing nuclear factor erythroid-derived 2-related factor 2 nuclear translocation.
Abstract Activation of endoplasmic reticulum (ER) stress is involved in the development of nonalcoholic fatty liver disease. Glucagon-like peptide-1 (GLP-1) has been reported to reduce hepatic steatosis, but the underlying mechanism has not been fully elucidated. Here, we investigated whether exendin-4 (EX-4), a GLP-1 receptor analogue, improves hepatic steatosis through ER stress reduction. Furthermore, we explored which ER stress pathway is involved in this process, with a focus on the protein kinase RNA-like ER kinase (PERK)-nuclear factor erythroid-derived 2-related factor 2 (Nrf2) pathway. EX-4 treatment redu...
Source: Toxicology and Applied Pharmacology - September 22, 2018 Category: Toxicology Authors: Yoo J, Cho IJ, Jeong IK, Ahn KJ, Chung HY, Hwang YC Tags: Toxicol Appl Pharmacol Source Type: research

Group II muscarinic acetylcholine receptors attenuate hepatic injury via Nrf2/ARE pathway.
Abstract Parasympathetic nervous system dysfunction is common in patients with liver disease. We have previously shown that muscarinic acetylcholine receptors (mAchRs) play an important role in the regulation of hepatic fibrosis and that the receptor agonists and antagonists affect hepatocyte proliferation. However, little is known about the impact of the different mAchR subtypes and associated signaling pathways on liver injury. Here, we treated the human liver cell line HL7702 with 10 mmol/L carbon tetrachloride (CCL4) to induce hepatocyte damage. We found that CCL4 treatment increased the protein levels of gr...
Source: Toxicology and Applied Pharmacology - March 27, 2020 Category: Toxicology Authors: Luo L, Zhang G, Mao L, Wang P, Xi C, Shi G, Leavenworth JW Tags: Toxicol Appl Pharmacol Source Type: research

Hesperetin protects against palmitate-induced cellular toxicity via induction of GRP78 in hepatocytes.
In conclusion, hesperetin protected against palmitate-induced hepatic cell death via activation of the sXBP1/GRP78 signaling pathway, thus inhibiting palmitate-induced ER stress. Moreover, high concentrations of hesperetin induce ER stress and subsequently cause cell death in hepatocytes. PMID: 32763355 [PubMed - as supplied by publisher]
Source: Toxicology and Applied Pharmacology - August 4, 2020 Category: Toxicology Authors: Geng Y, Wu Z, Buist-Homan M, Blokzijl H, Moshage H Tags: Toxicol Appl Pharmacol Source Type: research

Carnosol alleviates nonalcoholic fatty liver disease by inhibiting mitochondrial dysfunction and apoptosis through targeting of PRDX3
In conclusion, CAR suppressed lipid accumulation, mitochondrial dysfunction and hepatocyte apoptosis by activating PRDX3, mitigating the progression of NAFLD, and thus, CAR may represent a promising candidate for clinical treatment of steatosis.PMID:34678374 | DOI:10.1016/j.taap.2021.115758
Source: Toxicology and Applied Pharmacology - October 22, 2021 Category: Toxicology Authors: Yunfei Geng Yue Wang Ruimin Sun Xiaohui Kang Huanyu Zhao Meiyang Zhu Yu Sun Yan Hu Zhecheng Wang Xiaofeng Tian Yan Zhao Jihong Yao Source Type: research

Nimbolide attenuated the inflammation in the liver of autoimmune hepatitis's mice through regulation of HDAC3
Toxicol Appl Pharmacol. 2021 Nov 12:115795. doi: 10.1016/j.taap.2021.115795. Online ahead of print.ABSTRACTA chronic liver disease named autoimmune hepatitis (AIH) will carry elevated levels of inflammatory cytokines, but there is currently no effective treatment to cure it. Histone deacetylase 3 (HDAC3) takes an important position in regulating the expression of inflammatory genes. Nimbolide (NIB) is a limonoid extracted from the neem tree (Azadirachta indica) that has been found to be effective against many diseases, including cancer, scleroderma, and acute respiratory distress syndrome. Here, we investigated the protect...
Source: Toxicology and Applied Pharmacology - November 15, 2021 Category: Toxicology Authors: Dingchao Xia Dazhi Chen Tingchen Cai Lujian Zhu Yanhan Lin Sijie Yu Kailu Zhu Xiaodong Wang Lanman Xu Yongping Chen Source Type: research