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Hepatoprotective Effect of Mixture of Dipropyl Polysulfides in Concanavalin A-Induced Hepatitis. Nutrients 2021; 13:nu13031022. [PMID: 33809904 PMCID: PMC8004208 DOI: 10.3390/nu13031022] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 03/08/2021] [Accepted: 03/13/2021] [Indexed: 12/15/2022] Open
Abstract
The main biologically active components of plants belonging to the genus Allium, responsible for their biological activities, including anti-inflammatory, antioxidant and immunomodulatory, are organosulfur compounds. The aim of this study was to synthetize the mixture of dipropyl polysulfides (DPPS) and to test their biological activity in acute hepatitis. C57BL/6 mice were administered orally with DPPS 6 h before intravenous injection of Concanavalin A (ConA). Liver inflammation, necrosis and hepatocytes apoptosis were determined by histological analyses. Cytokines in liver tissue were determined by ELISA, expression of adhesive molecules and enzymes by RT PCR, while liver mononuclear cells were analyzed by flow cytometry. DPPS pretreatment significantly attenuated liver inflammation and injury, as evidenced by biochemical and histopathological observations. In DPPS-pretreated mice, messenger RNA levels of adhesion molecules and NADPH oxidase complex were significantly reduced, while the expression of SOD enzymes was enhanced. DPPS pretreatment decreased protein level of inflammatory cytokines and increased percentage of T regulatory cells in the livers of ConA mice. DPPS showed hepatoprotective effects in ConA-induced hepatitis, characterized by attenuation of inflammation and affection of Th17/Treg balance in favor of T regulatory cells and implicating potential therapeutic usage of DPPS mixture in inflammatory liver diseases.
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2
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Schippers A, Hübel J, Heymann F, Clahsen T, Eswaran S, Schlepütz S, Püllen R, Gaßler N, Tenbrock K, Tacke F, Wagner N. MAdCAM-1/α4β7 Integrin-Mediated Lymphocyte/Endothelium Interactions Exacerbate Acute Immune-Mediated Hepatitis in Mice. Cell Mol Gastroenterol Hepatol 2020; 11:1227-1250.e1. [PMID: 33316453 PMCID: PMC8053699 DOI: 10.1016/j.jcmgh.2020.12.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 12/03/2020] [Accepted: 12/04/2020] [Indexed: 12/12/2022]
Abstract
BACKGROUND & AIMS Aberrant lymphocyte homing could potentially link inflammatory processes in the intestine and the liver, as distinct hepatobiliary diseases frequently develop as extra-intestinal manifestations in inflammatory bowel disease. In this study, we examined the role of the gut-tropic leukocyte adhesion molecule β7 integrin and its endothelial ligand mucosal addressin cell-adhesion molecule-1 (MAdCAM-1) in immune-mediated hepatitis in mice. METHODS Wild-type (WT) mice, MAdCAM-1-deficient mice, β7 integrin-deficient mice, RAG-2-deficient mice, RAG-2/MAdCAM-1 double-deficient mice, and RAG-2/β7 integrin double-deficient mice were subjected to concanavalin A (ConA)-induced hepatitis. The degree of hepatitis was evaluated by histology, flow cytometry, and expression analysis of inflammatory mediators. The motility of lymphocytes in progressive liver damage was assessed by intravital laser scanning multiphoton microscopy. RESULTS Ablation of MAdCAM-1 or β7 integrin ameliorated ConA-induced hepatitis in mice. β7 integrin-deficient lymphocytes caused less liver damage than WT lymphocytes in ConA-treated RAG-2-deficient mice. Moreover, WT lymphocytes caused less liver damage in ConA-treated RAG-2/β7 integrin double-deficient mice than in similarly treated RAG-2-deficient mice, indicating that β7 integrin expression contributes significantly to the liver damage mediated by innate immune cells. MAdCAM-1 expression was dependent on β7 integrin expression on adaptive and innate immune cells. Most importantly, lymphocytes in ConA-treated MAdCAM-1-deficient mice displayed more motility and less adhesion in the liver sinusoids in vivo, than lymphocytes in similarly treated WT mice. CONCLUSIONS These data suggest that β7 integrin expression on lymphocytes and innate immune cells contributes to MAdCAM-1 upregulation and liver damage in acute immune-mediated hepatitis, most likely by facilitating lymphocyte/sinusoidal endothelial cell interactions.
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Affiliation(s)
- Angela Schippers
- Department of Pediatrics, Medical Faculty, RWTH Aachen University, Aachen, Germany
| | - Jessica Hübel
- Department of Pediatrics, Medical Faculty, RWTH Aachen University, Aachen, Germany
| | - Felix Heymann
- Department of Hepatology and Gastroenterology, Charité University Medicine Berlin, Berlin, Germany
| | - Thomas Clahsen
- Department of Pediatrics, Medical Faculty, RWTH Aachen University, Aachen, Germany
| | - Sreepradha Eswaran
- Department of Pediatrics, Medical Faculty, RWTH Aachen University, Aachen, Germany
| | - Sarah Schlepütz
- Department of Pediatrics, Medical Faculty, RWTH Aachen University, Aachen, Germany
| | - Robin Püllen
- Department of Pediatrics, Medical Faculty, RWTH Aachen University, Aachen, Germany
| | - Nikolaus Gaßler
- Institute of Forensic Medicine, Section of Pathology, Jena University Hospital, Jena, Germany
| | - Klaus Tenbrock
- Department of Pediatrics, Medical Faculty, RWTH Aachen University, Aachen, Germany
| | - Frank Tacke
- Department of Hepatology and Gastroenterology, Charité University Medicine Berlin, Berlin, Germany
| | - Norbert Wagner
- Department of Pediatrics, Medical Faculty, RWTH Aachen University, Aachen, Germany,Correspondence Address Correspondence to: Norbert Wagner, MD, Department of Pediatrics, RWTH Aachen University, Pauwelsstrasse 30, D-52074 Aachen, Germany. fax: +49 241-8082492.
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Almishri W, Shaheen AA, Sharkey KA, Swain MG. The Antidepressant Mirtazapine Inhibits Hepatic Innate Immune Networks to Attenuate Immune-Mediated Liver Injury in Mice. Front Immunol 2019; 10:803. [PMID: 31031775 PMCID: PMC6474187 DOI: 10.3389/fimmu.2019.00803] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2018] [Accepted: 03/26/2019] [Indexed: 12/11/2022] Open
Abstract
Activation of the innate immune system, including tissue macrophages and associated neutrophil infiltration, is an important driver of subsequent adaptive immune responses in many autoimmune diseases, including autoimmune hepatitis (AIH). The antidepressant mirtazapine has a unique complex pharmacology, altering signaling through a number of serotonin and histamine receptors that can impact macrophage function; an effect potentially influencing AIH outcome. In the mouse model of concanavalin A (Con A) induced liver injury (mimics many aspects of human AIH), in which early innate immune activation (i.e., stimulated hepatic macrophages/monocytes recruit neutrophils and additional monocytes to the liver) critically drives immune-mediated hepatitis induction, mirtazapine strikingly and dose-dependently inhibited Con A-induced liver injury. This inflammation-suppressing effect of mirtazapine was linked to an attenuation of Con A-stimulated early innate immune responses within the liver, including inhibition of hepatic macrophage/monocyte activation, decreased hepatic macrophage/monocyte-derived pro-inflammatory cytokine (e.g., TNFα) and chemokine (e.g., CXCL1 and CXCL2) production, suppression of Con A-induced increases in the hepatic expression of the neutrophil relevant endothelial cell adhesion molecule ICAM-1, with the resultant significant reduction in neutrophil recruitment into the liver. Consistent with our findings in the Con A model, mirtazapine also significantly reduced activation-induced release of cytokine/chemokine mediators from human CD14+ monocytes in vitro. Conclusion: Our data suggest that mirtazapine can attenuate hepatic innate immune responses that critically regulate the subsequent development of autoimmune liver injury. Therefore, given that it is a safe and widely used medication, mirtazapine may represent a novel therapeutic approach to autoimmune liver disease.
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Affiliation(s)
- Wagdi Almishri
- Liver Unit, Snyder Institute for Chronic Disease, University of Calgary, Calgary, AB, Canada
| | - Abdel Aziz Shaheen
- Liver Unit, Snyder Institute for Chronic Disease, University of Calgary, Calgary, AB, Canada
| | - Keith A. Sharkey
- Cumming School of Medicine, Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada
| | - Mark G. Swain
- Liver Unit, Snyder Institute for Chronic Disease, University of Calgary, Calgary, AB, Canada
- *Correspondence: Mark G. Swain
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Luo Q, Ding J, Zhu L, Chen F, Xu L. Hepatoprotective Effect of Wedelolactone against Concanavalin A-Induced Liver Injury in Mice. THE AMERICAN JOURNAL OF CHINESE MEDICINE 2018; 46:819-833. [PMID: 29737211 DOI: 10.1142/s0192415x1850043x] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Eclipta prostrata L. is a traditional Chinese herbal medicine that has been used in the treatment of liver diseases. However, its biological mechanisms remain elusive. The current study aimed to investigate the hepatoprotective effect of wedelolactone, a major coumarin ingredient of Eclipta prostrata L., on immune-mediated liver injury. Using the well-established animal model of Concanavalin A (ConA)-induced hepatitis (CIH), we found that pretreatment of mice with wedelolactone markedly reduced both the serum levels of transaminases and the severity of liver damage. We further investigated the mechanisms of the protective effect of wedelolactone. In mice treated with wedelolactone prior to the induction of CIH, increases of serum concentrations of tumor necrosis factor (TNF)-[Formula: see text], interferon (IFN)-[Formula: see text], and interleukin (IL)-6 were dramatically attenuated. Additionally, expressions of the interferon-inducible chemokine (C-X-C motif) ligand 10 gene CXCL10 and intercellular adhesion molecule 1 gene ICAM1 were lower in livers of the treated mice. Moreover, wedelolactone-treated CIH mice exhibited reduced leukocyte infiltration and T-cell activation in liver. Furthermore, wedelolactone suppressed the activity of nuclear factor-kappa B (NF-[Formula: see text]B), a critical transcriptional factor of the above-mentioned inflammatory cytokines by limiting the phosphorylation of I kappa B alpha (I[Formula: see text]B[Formula: see text] and p65. In conclusion, these findings demonstrate the inhibitory potential of wedelolactone in immune-mediated liver injury in vivo, and show that this protection is associated with modulation of the NF-[Formula: see text]B signaling pathway.
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Affiliation(s)
- Qingqiong Luo
- * Department of Clinical Immunology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P. R. China
| | - Jieying Ding
- * Department of Clinical Immunology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P. R. China
| | - Liping Zhu
- * Department of Clinical Immunology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P. R. China
| | - Fuxiang Chen
- * Department of Clinical Immunology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P. R. China
| | - Lili Xu
- † Division of Gastroenterology, Zhongshan Hospital, Fudan University, Shanghai, P. R. China
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Ko YE, Yoon SY, Ly SY, Kim JH, Sohn KY, Kim JW. 1-palmitoyl-2-linoleoyl-3-acetyl-rac-glycerol (PLAG) reduces hepatic injury in concanavalin A-treated mice. J Cell Biochem 2017; 119:1392-1405. [PMID: 28749086 DOI: 10.1002/jcb.26299] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2016] [Accepted: 07/18/2017] [Indexed: 11/10/2022]
Abstract
1-palmitoyl-2-linoleoyl-3-acetyl-rac-glycerol (PLAG), a chemically synthesized monoacetyldiaglyceride, is one of the constituents in Sika deer antlers and has been known traditionally as having immunomodulatory effects. However, the mechanism by which PLAG controls neutrophil migration, which evokes liver injury in the hepatitis animal model, remains largely unknown. This study was designed to evaluate the immunomodulatory effects of PLAG on cytokine secretion and neutrophil migration in vivo and in vitro. Concanavalin A (Con A) induced leukocyte infiltration in the liver and increased plasma cytokine levels. Pretreatment with PLAG reduced the levels of interleukin (IL)-4, IL-6, IL-10, and CXCL2, but maintained interferon (IFN)-γ levels and modulated neutrophil recruitment toward the liver. Furthermore, the mRNA and protein levels of IL-4 and CXCL2 in liver tissue were also decreased in the Con A-treated mice. Liver histology analyses showed that PLAG reduced Con A-induced hepatic necrosis, which was accompanied by leukocyte infiltration. The in vitro studies revealed that PLAG reduced IL-4 secretion in Con A stimulated T cell and blocked signal transducer and activator of transcription 6 (STAT6) Con A induced hepatocyte. PLAG attenuated IL-4 induced activation of atypical protein kinase C (PKC)/STAT6 in hepatocytes and inhibited neutrophil migration toward the liver tissue through suppression of IL-8/vascular cell adhesion molecule (VCAM) expression. These results suggest that PLAG could mitigate excess neutrophil migration into liver tissue and potentially have a therapeutic effect on immune-mediated liver injury.
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Affiliation(s)
- Young E Ko
- Cell Factory Research Center, Division of Systems Biology and Bioengineering, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea.,Department of Food and Nutrition, Chungnam National University, Daejeon, Republic of Korea
| | - Sun Y Yoon
- Division of Global New Drug Development, ENZYCHEM Lifesciences, Daejeon, Korea
| | - Sun Y Ly
- Department of Food and Nutrition, Chungnam National University, Daejeon, Republic of Korea
| | - Joo H Kim
- Department of Pathology, EulJi University School of Medicine, Daejeon, Republic of Korea
| | - Ki Y Sohn
- Division of Global New Drug Development, ENZYCHEM Lifesciences, Daejeon, Korea
| | - Jae W Kim
- Cell Factory Research Center, Division of Systems Biology and Bioengineering, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea
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Sang XX, Wang RL, Zhang CE, Liu SJ, Shen HH, Guo YM, Zhang YM, Niu M, Wang JB, Bai ZF, Xiao XH. Sophocarpine Protects Mice from ConA-Induced Hepatitis via Inhibition of the IFN-Gamma/STAT1 Pathway. Front Pharmacol 2017; 8:140. [PMID: 28377718 PMCID: PMC5359249 DOI: 10.3389/fphar.2017.00140] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Accepted: 03/06/2017] [Indexed: 12/24/2022] Open
Abstract
Sophocarpine is the major pharmacologically active compound of the traditional Chinese herbal medicine Radix Sophorae Subprostratae which has been used in treating hepatitis for years in China. It has been demonstrated that Sophocarpine exerts an activity in immune modulation and significantly decreases the production of inflammatory cytokines. However, the protective effects of Sophocarpine in T cell-dependent immune hepatitis remained unknown. The aim of this study was to determine the protective effects and pharmacological mechanisms of Sophocarpine on Concanavalin A (ConA)-induced hepatitis, an experimental model of T cell-mediated liver injury. BALB/C mice were pretreated with Sophocarpine or Bicyclol for five consecutive days. Thirty minutes after the final administration, the mice were injected with 15 mg⋅kg-1 of ConA intravenously. The results indicated that pretreatment with Sophocarpine significantly ameliorated liver inflammation and injury as evidenced by both biochemical and histopathological observations. Moreover, in Sophocarpine-pretreated mice, liver messenger RNA expression levels of chemokines and adhesion molecules, such as macrophage inflammatory protein-1α, CXC chemokine ligand 10, and Intercellular adhesion molecule-1, were markedly reduced. Further studies revealed that Sophocarpine significantly downregulated the expression of T-bet via inhibition of signal transducers and activators of transcription1 (STAT1) activation and overexpression of suppressor of cytokine signaling1, inhibiting the activation of Th1 cells and the expression of Interferon-γ (IFN-γ). Altogether, these results suggest new opportunities to use Sophocarpine in the treatment of T cell-mediated liver disease. In summary, Sophocarpine could attenuate ConA-induced liver injury, and the protective effect of Sophocarpine was associated with its inhibition effect of pro-inflammatory cytokines, chemokines, and the IFN-γ/STAT1 signaling pathway.
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Affiliation(s)
- Xiu-Xiu Sang
- China Military Institute of Chinese Medicine, 302 Military Hospital Beijing, China
| | - Rui-Lin Wang
- Integrative Medical Center, 302 Military Hospital Beijing, China
| | - Cong-En Zhang
- China Military Institute of Chinese Medicine, 302 Military Hospital Beijing, China
| | - Shi-Jing Liu
- Integrative Medical Center, 302 Military Hospital Beijing, China
| | - Hong-Hui Shen
- China Military Institute of Chinese Medicine, 302 Military Hospital Beijing, China
| | - Yu-Ming Guo
- China Military Institute of Chinese Medicine, 302 Military Hospital Beijing, China
| | - Ya-Ming Zhang
- China Military Institute of Chinese Medicine, 302 Military Hospital Beijing, China
| | - Ming Niu
- China Military Institute of Chinese Medicine, 302 Military Hospital Beijing, China
| | - Jia-Bo Wang
- China Military Institute of Chinese Medicine, 302 Military Hospital Beijing, China
| | - Zhao-Fang Bai
- China Military Institute of Chinese Medicine, 302 Military Hospital Beijing, China
| | - Xiao-He Xiao
- China Military Institute of Chinese Medicine, 302 Military Hospital Beijing, China
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Salecan protected against concanavalin A-induced acute liver injury by modulating T cell immune responses and NMR-based metabolic profiles. Toxicol Appl Pharmacol 2017; 317:63-72. [PMID: 28109817 DOI: 10.1016/j.taap.2017.01.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Revised: 01/07/2017] [Accepted: 01/16/2017] [Indexed: 12/24/2022]
Abstract
Salecan, a water-soluble extracellular β-glucan produced by Agrobacterium sp. ZX09, has been reported to exhibit a wide range of biological effects. The aims of the present study were to investigate the protective effect of salecan against Concanavalin A (ConA)-induced hepatitis, a well-established animal model of immune-mediated liver injury, and to search for possible mechanisms. C57BL/6 mice were pretreated with salecan followed by ConA injection. Salecan treatment significantly reduced ConA-induced acute liver injury, and suppressed the expression and secretion of inflammatory cytokines including interferon (IFN)-γ, interleukin (IL)-6 and IL-1β in ConA-induced liver injury model. The high expression levels of chemokines and adhesion molecules such as MIP-1α, MIP-1β, ICAM-1, MCP-1 and RANTES in the liver induced by ConA were also down-regulated after salecan treatment. Salecan inhibited the infiltration and activation of inflammatory cells, especially T cells, in the liver induced by ConA. Moreover, salecan reversed the metabolic profiles of ConA-treated mice towards the control group by partly recovering the metabolic perturbations induced by ConA. Our results suggest the preventive and therapeutic potential of salecan in immune-mediated hepatitis.
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Li X, Liu HC, Yao QY, Xu BL, Zhang SC, Tu CT. Quercetin Protects Mice from ConA-Induced Hepatitis by Inhibiting HMGB1-TLR Expression and Down-Regulating the Nuclear Factor Kappa B Pathway. Inflammation 2016; 39:96-106. [PMID: 26267064 DOI: 10.1007/s10753-015-0227-9] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The dietary flavonoid quercetin has hepatoprotective effects. We analyzed the effects of quercetin on concanavalin A (ConA)-induced hepatitis in mice and its underlying molecular mechanisms of action. Mice were administered quercetin (50 mg/kg body weight, i.p.) or vehicle 30 min before intravenous administration of ConA. Quercetin pretreatment significantly reduced the ConA-induced elevations in plasma aminotransferase concentrations and liver necrosis, as well as reducing serum concentrations of the pro-inflammatory cytokines tumor necrosis factor (TNF)-α, interferon-γ, and interleukin-4. Quercetin pretreatment also reduced expression of high-mobility group box 1 protein (HMGB1) and toll-like receptor (TLR)-2 and TLR-4 messenger RNA (mRNA) and protein in liver tissues. Quercetin pretreatment significantly inhibited degradation of inhibitory kappa B alpha and modulated ConA-induced nuclear translocation in the liver of nuclear factor kappa B (NF-κB) p65. These results demonstrate that quercetin protects against ConA-mediated hepatitis in mice by attenuating the HMGB1-TLRs-NF-κB signaling pathway.
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Affiliation(s)
- Xi Li
- Department of Gastroenterology and Hepatology, Zhongshan Hospital, Fudan University, Shanghai, China
- Department of Geriatrics, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Hong-Chun Liu
- Department of Gastroenterology and Hepatology, Zhongshan Hospital, Fudan University, Shanghai, China
- Shanghai Institute of Liver Diseases, 180 Fenglin Road, Shanghai, 200032, China
| | - Qun-Yan Yao
- Department of Gastroenterology and Hepatology, Zhongshan Hospital, Fudan University, Shanghai, China
- Shanghai Institute of Liver Diseases, 180 Fenglin Road, Shanghai, 200032, China
| | - Bei-Li Xu
- Department of Gastroenterology and Hepatology, Zhongshan Hospital, Fudan University, Shanghai, China
- Shanghai Institute of Liver Diseases, 180 Fenglin Road, Shanghai, 200032, China
| | - Shun-Cai Zhang
- Department of Gastroenterology and Hepatology, Zhongshan Hospital, Fudan University, Shanghai, China
- Shanghai Institute of Liver Diseases, 180 Fenglin Road, Shanghai, 200032, China
| | - Chuan-Tao Tu
- Department of Gastroenterology and Hepatology, Zhongshan Hospital, Fudan University, Shanghai, China.
- Shanghai Institute of Liver Diseases, 180 Fenglin Road, Shanghai, 200032, China.
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RIPK1 protects from TNF-α-mediated liver damage during hepatitis. Cell Death Dis 2016; 7:e2462. [PMID: 27831558 PMCID: PMC5260888 DOI: 10.1038/cddis.2016.362] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Revised: 09/26/2016] [Accepted: 09/29/2016] [Indexed: 02/07/2023]
Abstract
Cell death of hepatocytes is a prominent characteristic in the pathogenesis of liver disease, while hepatolysis is a starting point of inflammation in hepatitis and loss of hepatic function. However, the precise molecular mechanisms of hepatocyte cell death, the role of the cytokines of hepatic microenvironment and the involvement of intracellular kinases, remain unclear. Tumor necrosis factor alpha (TNF-α) is a key cytokine involved in cell death or survival pathways and the role of RIPK1 has been associated to the TNF-α-dependent signaling pathway. We took advantage of two different deficient mouse lines, the RIPK1 kinase dead knock-in mice (Ripk1K45A) and the conditional knockout mice lacking RIPK1 only in liver parenchymal cells (Ripk1LPC-KO), to characterize the role of RIPK1 and TNF-α in hepatitis induced by concanavalin A (ConA). Our results show that RIPK1 is dispensable for liver homeostasis under steady-state conditions but in contrast, RIPK1 kinase activity contributes to caspase-independent cell death induction following ConA injection and RIPK1 also serves as a scaffold, protecting hepatocytes from massive apoptotic cell death in this model. In the Ripk1LPC-KO mice challenged with ConA, TNF-α triggers apoptosis, responsible for the observed severe hepatitis. Mechanism potentially involves both TNF-independent canonical NF-κB activation, as well as TNF-dependent, but canonical NF-κB-independent mechanisms. In conclusion, our results suggest that RIPK1 kinase activity is a pertinent therapeutic target to protect liver against excessive cell death in liver diseases.
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Pavlovych SI, Makogon NV, Grushka NG, Bryzgina TM, Janchiy RI. MORPHOLOGICAL CHANGES IN MICE LIVER IN DYNAMICS OF CONCANAVALIN A - INDUCED HEPATITIS. ACTA ACUST UNITED AC 2016. [PMID: 29537204 DOI: 10.15407/fz62.01.083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The injure of the liver tissue and its infiltration by cells of the innate and adaptive immunity in dynamics of Con A-induced hepatitis in mice was studied. The semiquantitative method of damage rate of microcirculation channel and liver parenchyma was used, leukocyte liver infiltration and cellular composition of infiltrates were investigated also. Primary liver reaction to the Con-A was the inflammatory changes in the vascular bed, followed by disturbances in the parenchyma.The sufficient increasing of leukocyte migration to the liver was revealed. Besides, the neutrophile infiltration was increased first with a maximum at 6 hours of the experiment (63,9 ±4,6%, p<0,001 to the control level) ,and then the lymphocyte infiltration was increased with creation of manycellular lymphocytemacrophage infiltrates (62% at 48 hours comparing to 6 hours of experiment) and sufficient quantity of plasma cells population (4,9%, p<0,05 comparing to 6 hours of experiment). The obtained data gives the base to suggest that the elevated infiltration of liver tissue by leukocytes, particularly by lymphocytes and monocytes, together with necrotic death increasing creats the conditions for effective intracellular interaction and immune response to autoantigenes. This can be the essential pathogenic mechanism of development of autoimmune liver deseases.
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11
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Luo Q, Zhu L, Ding J, Zhuang X, Xu L, Chen F. Protective effect of galangin in Concanavalin A-induced hepatitis in mice. DRUG DESIGN DEVELOPMENT AND THERAPY 2015; 9:2983-92. [PMID: 26089647 PMCID: PMC4468934 DOI: 10.2147/dddt.s80979] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Galangin is an active pharmacological ingredient from propolis and Alpinia officinarum Hance, and has been reported to have anti-inflammatory and antioxidative properties. The present study aims to reveal the effect of galangin on Concanavalin A (ConA)-induced hepatitis (CIH), a well-established animal model of immune-mediated liver injury, and to clarify the related mechanism. C57BL/6 mice were pretreated with galangin followed by ConA challenge. Results indicated that galangin inhibited ConA-induced liver damage. Mice pretreated with galangin showed more reduction of liver damage when compared with control mice pretreated with vehicle solution. In galangin-pretreated mice with induced CIH, increases in serum levels of several inflammatory cytokines, including tumor necrosis factor-α, interferon-γ, and interleukin-12 were dramatically attenuated, and chemokines and adhesion molecules like interferon inducible protein-10, macrophage inflammatory protein-1α, and inter-cellular adhesion molecule-1 messenger RNA expressions in liver were decreased. Moreover, CIH mice pretreated with galangin showed less leukocyte infiltration and T-cell activation in the liver. Further, the mechanism of the anti-inflammatory effects of galangin may be attributed to its modulation of crucial inflammatory signaling pathways, including nuclear factor kappa B and interferon-gamma/signal transducer and activator of transcription 1. Collectively, these findings suggest the preventive and therapeutic potential of galangin in immune-mediated liver injury in vivo.
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Affiliation(s)
- Qingqiong Luo
- Department of Clinical Immunology, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, People's Republic of China
| | - Liping Zhu
- Department of Clinical Immunology, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, People's Republic of China
| | - Jieying Ding
- Department of Clinical Immunology, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, People's Republic of China
| | - Xing Zhuang
- Department of Clinical Immunology, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, People's Republic of China
| | - Lili Xu
- Division of Gastroenterology, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China
| | - Fuxiang Chen
- Department of Clinical Immunology, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, People's Republic of China
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12
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Trivedi PJ, Adams DH. Mucosal immunity in liver autoimmunity: A comprehensive review. J Autoimmun 2013; 46:97-111. [DOI: 10.1016/j.jaut.2013.06.013] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Accepted: 06/19/2013] [Indexed: 12/14/2022]
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Cao L, Zou Y, Zhu J, Fan X, Li J. Ginsenoside Rg1 attenuates concanavalin A-induced hepatitis in mice through inhibition of cytokine secretion and lymphocyte infiltration. Mol Cell Biochem 2013; 380:203-10. [DOI: 10.1007/s11010-013-1674-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2013] [Accepted: 05/02/2013] [Indexed: 10/26/2022]
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14
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Protective role of IL-33/ST2 axis in Con A-induced hepatitis. J Hepatol 2012; 56:26-33. [PMID: 21703183 DOI: 10.1016/j.jhep.2011.03.022] [Citation(s) in RCA: 117] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2010] [Revised: 03/16/2011] [Accepted: 03/18/2011] [Indexed: 02/07/2023]
Abstract
BACKGROUND & AIMS We used Concanavalin A-induced liver injury to study the role of Interleukin 33 and its receptor ST2 in the induction of inflammatory pathology and hepatocellular damage. METHODS We tested susceptibility to Concanavalin A induced hepatitis in ST2 deficient and wild type BALB/c mice and analyzed the effects of single injection of Interleukin 33 as evaluated by liver enzyme test, quantitative histology, mononuclear cell infiltration, cytokine production, intracellular staining of immune cells, and markers of apoptosis in the liver. RESULTS ST2 deficient mice developed significantly more severe hepatitis and had significantly higher number of mononuclear cells in the liver, CD4+ and CD8+ T cells, NKp46+ and CD3+NKp46+ cells, and F4/80+ macrophages. The level of pro-inflammatory cytokines in the sera and number of TNF alpha, IFN gamma, and IL-17 producing cells was higher in ST2 deficient mice. In contrast, number of CD4+Foxp3+ cells was statistically higher in wild type mice. Additionally, treatment of wild type mice with single (1 μg) injection of Interleukin 33 led to attenuation of the liver injury and milder infiltration of mononuclear cells, increase in total number of liver CD4+Foxp3+ cells and IL-4 producing CD4+ T cells. Interleukin 33 also suppressed the activation of caspase 3, prevented the expression of BAX, and enhanced the expression of antiapoptotic Bcl-2 in the liver. CONCLUSIONS We concluded that Interleukin 33/ST2 axis downregulated Concanavalin A-induced liver injury and should be evaluated as potential target in fulminant hepatitis in humans.
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Tu CT, Han B, Liu HC, Zhang SC. Curcumin protects mice against concanavalin A-induced hepatitis by inhibiting intrahepatic intercellular adhesion molecule-1 (ICAM-1) and CXCL10 expression. Mol Cell Biochem 2011; 358:53-60. [PMID: 21695461 DOI: 10.1007/s11010-011-0920-4] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2011] [Accepted: 06/07/2011] [Indexed: 12/20/2022]
Abstract
The effect of curcumin on liver injury caused by Concanavalin A (Con A) has not been carefully examined. This study was designed to evaluate the protective effect of curcumin on Con A-induced hepatitis in mice. Liver injured mice received curcumin by gavage at a dose of 200 mg/kg body weight before Con A intravenous administration. Curcumin was effective in reducing the elevated plasma levels of aminotransferases and the incidence of liver necrosis compared with Con A-injected control group. Enzyme-linked immunosorbent assay (ELISA) showed that curcumin suppressed proinflammatory cytokines such as tumor necrosis factor (TNF)-α, interferon (IFN)-γ, and interleukin (IL)-4 production in Con A-injected mice. The reduced severity of hepatitis in curcumin pretreated mice correlated with decrease in numbers of liver CD4(+) T cells but not CD8(+) T cells by immunohistochemical analysis. Furthermore, the expression levels of intercellular adhesion molecule-1 (ICAM-1) and the interferon-inducible chemokine CXCL10 in hepatic tissue were significantly decreased by curcumin pretreatment. In conclusion, curcumin pretreatment protects against T cell-mediated hepatitis in mice.
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Affiliation(s)
- Chuan-tao Tu
- Department of Gastroenterology and Hepatology, Zhongshan Hospital, Fudan University, Shanghai 200032, People's Republic of China.
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Osburn WO, Yates MS, Dolan PD, Liby KT, Sporn MB, Taguchi K, Yamamoto M, Kensler TW. Genetic or pharmacologic amplification of nrf2 signaling inhibits acute inflammatory liver injury in mice. Toxicol Sci 2008; 104:218-27. [PMID: 18417483 PMCID: PMC2435415 DOI: 10.1093/toxsci/kfn079] [Citation(s) in RCA: 132] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Oxidative stress-mediated destruction of normal parenchymal cells during hepatic inflammatory responses contributes to the pathogenesis of immune-mediated hepatitis and is implicated in the progression of acute inflammatory liver injury to chronic inflammatory liver disease. The transcription factor NF-E2-related factor 2 (Nrf2) regulates the expression of a battery of antioxidative enzymes and Nrf2 signaling can be activated by small-molecule drugs that disrupt Keap1-mediated repression of Nrf2 signaling. Therefore, genetic and pharmacologic approaches were used to activate Nrf2 signaling to assess protection against inflammatory liver injury. Profound increases in indicators of cell death were observed in both Nrf2 wild-type (Nrf2-WT) mice and Nrf2-disrupted (Nrf2-KO) mice 24 h following intravenous injection of concanavalin A (12.5 mg/kg, ConA), a model for T cell-mediated acute inflammatory liver injury. However, hepatocyte-specific conditional Keap1 null (Alb-Cre:Keap1(flox/-), cKeap1-KO) mice with constitutively enhanced expression of Nrf2-regulated antioxidative genes as well as Nrf2-WT mice but not Nrf2-KO mice pretreated with three daily doses of a triterpenoid that potently activates Nrf2 (30 mumol/kg, cyano-3,12-dioxooleana-1,9(11)-dien-28-oyl-imidazolide [CDDO-Im]) were highly resistant to ConA-mediated inflammatory liver injury. CDDO-Im pretreatment of both Nrf2-WT and Nrf2-KO mice resulted in equivalent suppression of serum proinflammatory soluble proteins suggesting that the hepatoprotection afforded by CDDO-Im pretreatment of Nrf2-WT mice but not Nrf2-KO mice was not due to suppression of systemic proinflammatory signaling, but instead was due to activation of Nrf2 signaling in the liver. Enhanced hepatic expression of Nrf2-regulated antioxidative genes inhibited inflammation-mediated oxidative stress, thereby preventing hepatocyte necrosis. Attenuation of hepatocyte death in cKeap1-KO mice and CDDO-Im pretreated Nrf2-WT mice resulted in decreased late-phase proinflammatory gene expression in the liver thereby diminishing the sustained influx of inflammatory cells initially stimulated by the ConA challenge. Taken together, these results clearly illustrate that targeted cytoprotection of hepatocytes through Nrf2 signaling during inflammation prevents the amplification of inflammatory responses in the liver.
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Affiliation(s)
- William O. Osburn
- Johns Hopkins University Bloomberg School of Public Health, Department of Environmental Health Sciences, Baltimore, MD
| | - Melinda S. Yates
- Johns Hopkins University School of Medicine, Department of Pharmacology and Molecular Sciences, Baltimore, MD
| | - Patrick D. Dolan
- Johns Hopkins University Bloomberg School of Public Health, Department of Environmental Health Sciences, Baltimore, MD
| | - Karen T. Liby
- Dartmouth Medical School, Department of Pharmacology and Toxicology, Hanover, NH
| | - Michael B. Sporn
- Dartmouth Medical School, Department of Pharmacology and Toxicology, Hanover, NH
| | - Keiko Taguchi
- Tohoku University Graduate School of Medicine and ERATO Environmental Response Project, 2-1 Seiryo-cho, Aoba-ku, Sendai 980-8575, Japan
| | - Masayuki Yamamoto
- Tohoku University Graduate School of Medicine and ERATO Environmental Response Project, 2-1 Seiryo-cho, Aoba-ku, Sendai 980-8575, Japan
| | - Thomas W. Kensler
- Johns Hopkins University Bloomberg School of Public Health, Department of Environmental Health Sciences, Baltimore, MD
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Bao QD, Yang LL, Wang L, Cui DL. Protective effects of magnesium isoglycyrrhizinate against carbon tetrachloride-induced acute liver injury in mice. Shijie Huaren Xiaohua Zazhi 2008; 16:1004-1007. [DOI: 10.11569/wcjd.v16.i9.1004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the effect of magnesium isoglycyrrhizinate (MI) on acute liver injury induced by carbon tetrachloride (CCl4) in mice and its relationship with the expression of nuclear factor kappa B (NF-κB) and intercellular adhesion molecule-1 (ICAM-1) in liver tissues.
METHODS: Thirty male Kunming mice (28 ± 2.2 g) were divided randomly into 3 groups: model group, normal control group and MI-treated group. The model of acute liver injury was established by intraperitoneal injection of 1% CCl4 (0.1 mL/10 g). The mice in normal control group and MI-treated group were injected with sterile saline, and furthermore, the MI-treated mice were intraperitoneally injected with MI (15 mg/kg, once per day for five days) 15 min before CCl4 injection. Serum levels of alanine aminotransferase (ALT), aspartate aminotransferase (AST) and tissue contents of malondialdehyde (MDA) and superoxide dismutase (SOD) were measured using biochemical method. SP immunohistochemistry was used to detect NF-κB and ICAM-1 expression. The pathological alterations were observed after HE staining.
RESULTS: The serum levels of AST, ALT and tissue content of MDA were significantly increased in model group as compared with those in normal control group (465.10 ± 35.90 kU/L vs 47.40 ± 4.13 kU/L; 582.37 ± 25.63 kU/L vs 116.06 ± 12.82 kU/L; 4.07 ± 0.38 nmol/mg vs 1.39 ± 0.03 nmol/mg; all P < 0.01), but tissue content of SOD was significantly decreased (29.71 ± 2.25 U/mg vs 87.02 ± 4.84 U/mg, P < 0.01). NF-κB and ICAM-1 were not expressed in normal control group, but obviously expressed in model group. In comparison with those in model group, the tissue expression of NF-κB and ICAM-1 in MI-treated group were decreased in concurrence with the alleviation of liver injury as well as a statistically significant decrease in AST (263.51 ± 22.89 kU/L), ALT (292.56 ± 26.01 kU/L) and MDA (2.17 ± 0.03 nmol/mg, P < 0.05) and increase in SOD (58.04 ± 2.56 U/mg, P < 0.01) in hepatic homogenate.
CONCLUSION: NF-κB and ICAM-1 are strongly expressed in acute liver injury in mice. MI can protect mice against CCl4-induced acute liver injury by suppressing NF-κB activation and subsequent expression of ICAM-1.
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Lalor PF, Tuncer C, Weston C, Martin-Santos A, Smith DJ, Adams DH. Vascular adhesion protein-1 as a potential therapeutic target in liver disease. Ann N Y Acad Sci 2007; 1110:485-96. [PMID: 17911464 DOI: 10.1196/annals.1423.051] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Vascular adhesion protein-1 (VAP-1) is a homodimeric, transmembrane sialoglycoprotein, and amine-oxidase enzyme constitutively expressed by hepatic endothelial cells, and as a soluble protein in serum (sVAP-1). VAP-1 mediates leukocyte adhesion and migration in an enzyme activity-dependent manner. We wished to determine whether VAP-1 blockade reduces leukocyte recruitment in inflammatory liver disease, and the mechanism by which this occurs. Our results show that VAP-1 is upregulated in the liver and serum of patients with inflammatory liver disease. Expression is maintained on hepatic sinusoidal endothelial cells (HSECs) isolated from explanted livers. Blockade of VAP-1 activity modestly decreases migration of normal lymphocytes across HSECs but has significant effects on the migration of peripheral blood lymphocytes (PBLs) and liver-derived lymphocytes across HSECs. Engagement of VAP-1 results in PI3-kinase-dependent NF-kappaB activation and increased chemokine and adhesion molecule expression. Thus complex mechanisms regulate VAP-1-mediated recruitment of leukocytes. Direct binding to endothelial VAP-1 protein, indirect enzyme-dependent activation of other endothelial adhesive pathways, and activation of leukocyte by VAP-1 ligand occupancy all contribute to adhesion. The restricted expression of VAP-1 and increased production of sVAP-1 in inflammatory liver disease confirm the validity of this molecule as a therapeutic target.
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Affiliation(s)
- Patricia F Lalor
- Liver Research Laboratory, Institute of Biomedical Research, Division of Medicine. University of Birmingham, Birmingham B15 2TT UK.
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