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Ji Y, Liang Y, Chu PH, Ge M, Yeung SC, Ip MSM, Mak JCW. The effects of intermittent hypoxia on hepatic expression of fatty acid translocase CD36 in lean and diet-induced obese mice. Biomed J 2023; 46:100566. [PMID: 36244649 PMCID: PMC10498409 DOI: 10.1016/j.bj.2022.10.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 09/01/2022] [Accepted: 10/11/2022] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Both obstructive sleep apnea (OSA) and non-alcoholic fatty liver disease (NAFLD) are prevalent within obese individuals. We aimed to investigate the effects of intermittent hypoxia (IH), a clinical feature of OSA, on hepatic expression of fatty acid translocase (CD36) in relation to liver injury in lean and diet-induced obese mice. METHODS Four-week-old male C57BL/6J mice were randomized to standard diet (SD) or high fat (HF) diet groups. At 13-week-old, all mice were exposed to either air or IH (IH30; thirty hypoxic episodes per hour) for four weeks. We assessed liver injury through lipid profile, oxidative and inflammatory stress, histological scoring and hepatic CD36 expression. RESULTS In lean mice, IH elevated serum and hepatic triglyceride and free fatty acid (FFA) levels, in line with upregulation of hepatic CD36 expression and myeloperoxidase (MPO)-positive cells in support of inflammatory infiltrates along with increase in serum malondialdehyde (MDA), C-X-C motif chemokine ligand 1(CXCL-1) and monocyte chemoattractant protein-1 (MCP-1). In diet-induced obese mice, an increase in hepatic alanine transaminase (ALT) activity, serum and hepatic levels of lipid parameters and inflammatory markers, serum MDA level, hepatic expressions of CD36 and α-smooth muscle actin (α-SMA), and MPO-positive cells was observed. IH potentiated hepatic ALT activity, serum CXCL-1 and hepatic interleukin-6 (IL-6), in line with inflammatory infiltrates, but paradoxically, reduced hepatic FFA level and hepatic CD36 expression, compared to obese mice without IH exposure. However, IH further augmented diet-induced liver steatosis and fibrosis as shown by histological scores. CONCLUSION This study contributes to support that IH featuring OSA may lead to liver injury via differential regulation of hepatic CD36 expression in lean and diet-induced obese mice.
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Affiliation(s)
- Yang Ji
- Respiratory Medicine, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - Yingmin Liang
- Respiratory Medicine, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China; Department of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Pak Hin Chu
- Department of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Mengqin Ge
- Department of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Sze Chun Yeung
- Department of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Mary Sau Man Ip
- Respiratory Medicine, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China; Department of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Judith Choi Wo Mak
- Respiratory Medicine, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China; Department of Medicine, The University of Hong Kong, Hong Kong SAR, China; Department of Pharmacology & Pharmacy, The University of Hong Kong, Hong Kong SAR, China.
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Khan RS, Lalor PF, Thursz M, Newsome PN. The role of neutrophils in alcohol-related hepatitis. J Hepatol 2023; 79:1037-1048. [PMID: 37290590 DOI: 10.1016/j.jhep.2023.05.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 05/24/2023] [Accepted: 05/25/2023] [Indexed: 06/10/2023]
Abstract
Alcohol-related liver disease is a major cause of liver disease-associated mortality, with inpatient care being a major contributor to its clinical and economic burden. Alcohol-related hepatitis (AH) is an acute inflammatory form of alcohol-related liver disease. Severe AH is associated with high short-term mortality, with infection being a common cause of death. The presence of AH is associated with increased numbers of circulating and hepatic neutrophils. We review the literature on the role of neutrophils in AH. In particular, we explain how neutrophils are recruited to the inflamed liver and how their antimicrobial functions (chemotaxis, phagocytosis, oxidative burst, NETosis) may be altered in AH. We highlight evidence for the existence of 'high-density' and 'low-density' neutrophil subsets. We also describe the potentially beneficial roles of neutrophils in the resolution of injury in AH through their effects on macrophage polarisation and hepatic regeneration. Finally, we discuss how manipulation of neutrophil recruitment/function may be used as a therapeutic strategy in AH. For example, correction of gut dysbiosis in AH could help to prevent excess neutrophil activation, or treatments could aim to enhance miR-223 function in AH. The development of markers that can reliably distinguish neutrophil subsets and of animal models that accurately reproduce human disease will be crucial for facilitating translational research in this important field.
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Affiliation(s)
- Reenam S Khan
- Centre for Liver and Gastrointestinal Research, Institute of Immunology and Inflammation, and National Institute for Health Research (NIHR) Birmingham Biomedical Research Centre, The Medical School, University of Birmingham, Birmingham, B15 2TT, UK
| | - Patricia F Lalor
- Centre for Liver and Gastrointestinal Research, Institute of Immunology and Inflammation, and National Institute for Health Research (NIHR) Birmingham Biomedical Research Centre, The Medical School, University of Birmingham, Birmingham, B15 2TT, UK
| | - Mark Thursz
- Hepatology Unit, Imperial College School of Medicine, St. Mary's Hospital, London, W21NY, England, UK
| | - Philip N Newsome
- Centre for Liver and Gastrointestinal Research, Institute of Immunology and Inflammation, and National Institute for Health Research (NIHR) Birmingham Biomedical Research Centre, The Medical School, University of Birmingham, Birmingham, B15 2TT, UK.
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3
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Sitaru S, Budke A, Bertini R, Sperandio M. Therapeutic inhibition of CXCR1/2: where do we stand? Intern Emerg Med 2023; 18:1647-1664. [PMID: 37249756 PMCID: PMC10227827 DOI: 10.1007/s11739-023-03309-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Accepted: 05/10/2023] [Indexed: 05/31/2023]
Abstract
Mounting experimental evidence from in vitro and in vivo animal studies points to an essential role of the CXCL8-CXCR1/2 axis in neutrophils in the pathophysiology of inflammatory and autoimmune diseases. In addition, the pathogenetic involvement of neutrophils and the CXCL8-CXCR1/2 axis in cancer progression and metastasis is increasingly recognized. Consequently, therapeutic targeting of CXCR1/2 or CXCL8 has been intensively investigated in recent years using a wide array of in vitro and animal disease models. While a significant benefit for patients with unwanted neutrophil-mediated inflammatory conditions may be expected from a potential clinical use of inhibitors, their use in severe infections or sepsis might be problematic and should be carefully and thoroughly evaluated in animal models and clinical trials. Translating the approaches using inhibitors of the CXCL8-CXCR1/2 axis to cancer therapy is definitively a new and promising research avenue, which parallels the ongoing efforts to clearly define the involvement of neutrophils and the CXCL8-CXCR1/2 axis in neoplastic diseases. Our narrative review summarizes the current literature on the activation and inhibition of these receptors in neutrophils, key inhibitor classes for CXCR2 and the therapeutic relevance of CXCR2 inhibition focusing here on gastrointestinal diseases.
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Affiliation(s)
- Sebastian Sitaru
- Institute of Cardiovascular Physiology and Pathophysiology, Walter Brendel Center of Experimental Medicine, University Hospital, Ludwig-Maximilian University, Großhaderner Str. 9, Planegg-Martinsried, 82152, Munich, Germany
- Department of Dermatology and Allergy, School of Medicine, Technical University of Munich, Munich, Germany
| | - Agnes Budke
- Institute of Cardiovascular Physiology and Pathophysiology, Walter Brendel Center of Experimental Medicine, University Hospital, Ludwig-Maximilian University, Großhaderner Str. 9, Planegg-Martinsried, 82152, Munich, Germany
| | | | - Markus Sperandio
- Institute of Cardiovascular Physiology and Pathophysiology, Walter Brendel Center of Experimental Medicine, University Hospital, Ludwig-Maximilian University, Großhaderner Str. 9, Planegg-Martinsried, 82152, Munich, Germany.
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4
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Keenum MC, Chatterjee P, Atalis A, Pandey B, Jimenez A, Roy K. Single-cell epitope-transcriptomics reveal lung stromal and immune cell response kinetics to nanoparticle-delivered RIG-I and TLR4 agonists. Biomaterials 2023; 297:122097. [PMID: 37001347 PMCID: PMC10192313 DOI: 10.1016/j.biomaterials.2023.122097] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 03/14/2023] [Accepted: 03/20/2023] [Indexed: 03/31/2023]
Abstract
Lung-resident and circulatory lymphoid, myeloid, and stromal cells, expressing various pattern recognition receptors (PRRs), detect pathogen- and danger-associated molecular patterns (PAMPs/DAMPs), and defend against respiratory pathogens and injuries. Here, we report the early responses of murine lungs to nanoparticle-delivered PAMPs, specifically the retinoic acid-inducible gene I (RIG-I) agonist poly-U/UC (PUUC), with or without the TLR4 agonist monophosphoryl lipid A (MPLA). Using cellular indexing of transcriptomes and epitopes by sequencing (CITE-seq), we characterized the responses at 4 and 24 h after intranasal administration. Within 4 h, ribosome-associated transcripts decreased in both stromal and immune cells, followed by widespread interferon-stimulated gene (ISG) expression. Using RNA velocity, we show that lung-neutrophils dynamically regulate the synthesis of cytokines like CXCL-10, IL-1α, and IL-1β. Co-delivery of MPLA and PUUC increased chemokine synthesis and upregulated antimicrobial binding proteins targeting iron, manganese, and zinc in many cell types, including fibroblasts, endothelial cells, and epithelial cells. Overall, our results elucidate the early PAMP-induced cellular responses in the lung and demonstrate that stimulation of the RIG-I pathway, with or without TLR4 agonists, induces a ubiquitous microbial defense state in lung stromal and immune cells. Nanoparticle-delivered combination PAMPs may have applications in intranasal antiviral and antimicrobial therapies and prophylaxis.
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Affiliation(s)
- M Cole Keenum
- Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University Atlanta, GA, USA
| | - Paramita Chatterjee
- Marcus Center for Therapeutic Cell Characterization and Manufacturing Georgia Institute of Technology, Atlanta, GA, USA
| | - Alexandra Atalis
- Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University Atlanta, GA, USA
| | - Bhawana Pandey
- Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University Atlanta, GA, USA
| | - Angela Jimenez
- Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University Atlanta, GA, USA
| | - Krishnendu Roy
- Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University Atlanta, GA, USA; Marcus Center for Therapeutic Cell Characterization and Manufacturing Georgia Institute of Technology, Atlanta, GA, USA; The Parker H. Petit Institute for Bioengineering and Biosciences Georgia Institute of Technology, Atlanta, GA, USA.
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5
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Bernard JK, Marakovits C, Smith LG, Francis H. Mast Cell and Innate Immune Cell Communication in Cholestatic Liver Disease. Semin Liver Dis 2023; 43:226-233. [PMID: 37268012 DOI: 10.1055/a-2104-9034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Mast cells (MCs) contribute to the pathogenesis of cholestatic liver diseases (primary sclerosing cholangitis [PSC] and primary biliary cholangitis [PBC]). PSC and PBC are immune-mediated, chronic inflammatory diseases, characterized by bile duct inflammation and stricturing, advancing to hepatobiliary cirrhosis. MCs are tissue resident immune cells that may promote hepatic injury, inflammation, and fibrosis formation by either direct or indirect interactions with other innate immune cells (neutrophils, macrophages/Kupffer cells, dendritic cells, natural killer, and innate lymphoid cells). The activation of these innate immune cells, usually through the degranulation of MCs, promotes antigen uptake and presentation to adaptive immune cells, exacerbating liver injury. In conclusion, dysregulation of MC-innate immune cell communications during liver injury and inflammation can lead to chronic liver injury and cancer.
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Grants
- IK6BX005226 Hickam Endowed Chair, Gastroenterology, Medicine, Indiana University, the Indiana University Health - Indiana University School of Medicine Strategic Research Initiative
- 1I01BX003031 Hickam Endowed Chair, Gastroenterology, Medicine, Indiana University, the Indiana University Health - Indiana University School of Medicine Strategic Research Initiative
- DK108959 United States Department of Veteran's Affairs, Biomedical Laboratory Research and Development Service
- DK119421 United States Department of Veteran's Affairs, Biomedical Laboratory Research and Development Service
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Affiliation(s)
- Jessica K Bernard
- Division of Gastroenterology and Hepatology, Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana
| | - Corinn Marakovits
- Division of Gastroenterology and Hepatology, Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana
| | - Leah G Smith
- Division of Gastroenterology and Hepatology, Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana
| | - Heather Francis
- Division of Gastroenterology and Hepatology, Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana
- Department of Research, Richard L. Roudebush VA Medical Center, Indianapolis, Indiana
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6
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Li Y, Palmer A, Lupu L, Huber-Lang M. Inflammatory response to the ischaemia-reperfusion insult in the liver after major tissue trauma. Eur J Trauma Emerg Surg 2022; 48:4431-4444. [PMID: 35831749 DOI: 10.1007/s00068-022-02026-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 05/28/2022] [Indexed: 11/29/2022]
Abstract
BACKGROUND Polytrauma is often accompanied by ischaemia-reperfusion injury to tissues and organs, and the resulting series of immune inflammatory reactions are a major cause of death in patients. The liver is one of the largest organs in the body, a characteristic that makes it the most vulnerable organ after multiple injuries. In addition, the liver is an important digestive organ that secretes a variety of inflammatory mediators involved in local as well as systemic immune inflammatory responses. Therefore, this review considers the main features of post-traumatic liver injury, focusing on the immuno-pathophysiological changes, the interactions between liver organs, and the principles of treatment deduced. METHODS We focus on the local as well as systemic immune response involving the liver after multiple injuries, with emphasis on the pathophysiological mechanisms. RESULTS An overview of the mechanisms underlying the pathophysiology of local as well as systemic immune responses involving the liver after multiple injuries, the latest research findings, and the current mainstream therapeutic approaches. CONCLUSION Cross-reactivity between various organs and cascade amplification effects are among the main causes of systemic immune inflammatory responses after multiple injuries. For the time being, the pathophysiological mechanisms underlying this interaction remain unclear. Future work will continue to focus on identifying potential signalling pathways as well as target genes and intervening at the right time points to prevent more severe immune inflammatory responses and promote better and faster recovery of the patient.
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Affiliation(s)
- Yang Li
- Institute for Clinical and Experimental Trauma Immunology (ITI), University Hospital Ulm, Helmholtzstr. 8/1, 89081, Ulm, Germany
| | - Annette Palmer
- Institute for Clinical and Experimental Trauma Immunology (ITI), University Hospital Ulm, Helmholtzstr. 8/1, 89081, Ulm, Germany
| | - Ludmila Lupu
- Institute for Clinical and Experimental Trauma Immunology (ITI), University Hospital Ulm, Helmholtzstr. 8/1, 89081, Ulm, Germany
| | - Markus Huber-Lang
- Institute for Clinical and Experimental Trauma Immunology (ITI), University Hospital Ulm, Helmholtzstr. 8/1, 89081, Ulm, Germany.
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7
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Liu H, Li MJ, Zhang XN, Wang S, Li LX, Guo FF, Zeng T. N,N-dimethylformamide-induced acute liver damage is driven by the activation of NLRP3 inflammasome in liver macrophages of mice. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 238:113609. [PMID: 35551047 DOI: 10.1016/j.ecoenv.2022.113609] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 04/27/2022] [Accepted: 05/02/2022] [Indexed: 06/15/2023]
Abstract
N,N-dimethylformamide (DMF) is a non-negligible volatile hazardous material in indoor and outdoor environments. Although the hepatotoxicity of DMF has been well recognized, the underlying mechanisms remain unclear and prophylactic medicine is still lacking. Herein, we established a DMF-induced acute liver injury mouse model and investigated the underlying mechanisms focusing on oxidative stress and the nucleotide-binding domain and leucine-rich repeat receptor (NLR) family pyrin domain (PYD)-containing 3 (NLRP3) inflammasome. DMF was found to induce oxidative stress, evidenced by the elevation of hepatic malondialdehyde (MDA) and 4-hydroxynonenal (4-HNE) adducts levels, and the decline of reduced glutathione (GSH) levels. However, neither N-acetyl cysteine (NAC) nor sulforaphane (SF) ameliorated the hepatoxicity induced by DMF in mice. Interestingly, DMF exposure led to focal necrosis of hepatocytes and NLRP3 inflammasome activation before the onset of obvious liver damage. In addition, DMF exposure induced infiltration and proinflammatory/M1 polarization of macrophages in mice livers. Furthermore, the inactivation of hepatic macrophages by GdCl3 significantly suppressed DMF-induced elevation of serum aminotransferase activities, neutrophile infiltration, and activation of NLRP3 inflammasome in mice liver. Collectively, these results suggest that DMF-induced acute hepatotoxicity may be attributed to the activation of NLRP3 inflammasome in liver macrophages, but not oxidative stress.
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Affiliation(s)
- Hong Liu
- Institute of Toxicology, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Ming-Jun Li
- Institute of Toxicology, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China; Tangshan Vocational&Technical College, Tangshan, Hebei 063000, China
| | - Xiu-Ning Zhang
- Institute of Toxicology, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Shuo Wang
- School of Pharmaceutical Sciences, Liaocheng University, Liaocheng, Shandong Province 252059, China
| | - Long-Xia Li
- Institute of Toxicology, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Fang-Fang Guo
- Department of Pharmacy, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China.
| | - Tao Zeng
- Institute of Toxicology, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China.
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8
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Nguyen NT, Umbaugh DS, Sanchez-Guerrero G, Ramachandran A, Jaeschke H. Kupffer cells regulate liver recovery through induction of chemokine receptor CXCR2 on hepatocytes after acetaminophen overdose in mice. Arch Toxicol 2022; 96:305-320. [PMID: 34724096 PMCID: PMC8762790 DOI: 10.1007/s00204-021-03183-0] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 10/21/2021] [Indexed: 02/07/2023]
Abstract
Acetaminophen (APAP) is a widely used analgesic, but also a main cause of acute liver injury in the United States and many western countries. APAP hepatotoxicity is associated with a sterile inflammatory response as shown by the infiltration of neutrophils and monocytes. While the contribution of the immune cells to promote liver repair have been demonstrated, the direct interactions between macrophages or neutrophils with hepatocytes to help facilitate hepatocyte proliferation and tissue repair remain unclear. The purpose of this study was to investigate the relationship between resident macrophages (Kupffer cells) and hepatocytes with a focus on the chemokine receptor CXCR2. C57BL/6J mice were subjected to an APAP overdose (300 mg/kg) and the role of CXCR2 on hepatocytes was investigated using a selective antagonist, SB225002. In addition, clodronate liposomes were used to deplete Kupffer cells to assess changes in CXCR2 expression. Our data showed that CXCR2 was mainly expressed on hepatocytes and it was induced specifically in hepatocytes around the necrotic area 24 h after APAP treatment. Targeting this receptor using an inhibitor caused a delayed liver recovery. Depletion of Kupffer cells significantly prevented CXCR2 induction on hepatocytes. In vitro and in vivo experiments also demonstrated that Kupffer cells regulate CXCR2 expression and pro-regenerative gene expression in surviving hepatocytes through production of IL-10. Thus, Kupffer cells support the transition of hepatocytes around the area of necrosis to a proliferative state through CXCR2 expression.
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9
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Gong L, Liao L, Dai X, Xue X, Peng C, Li Y. The dual role of immune response in acetaminophen hepatotoxicity: Implication for immune pharmacological targets. Toxicol Lett 2021; 351:37-52. [PMID: 34454010 DOI: 10.1016/j.toxlet.2021.08.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 07/16/2021] [Accepted: 08/23/2021] [Indexed: 12/14/2022]
Abstract
Acetaminophen (APAP), one of the most widely used antipyretic and analgesic drugs, principally contributes to drug-induced liver injury when taken at a high dose. APAP-induced liver injury (AILI) results in extensive necrosis of hepatocytes along with the occurrence of multiple intracellular events such as metabolic activation, cell injury, and signaling pathway activation. However, the specific role of the immune response in AILI remains controversial for its complicated regulatory mechanisms. A variety of inflammasomes, immune cells, inflammatory mediators, and signaling transduction pathways are activated in AILI. These immune components play antagonistic roles in aggravating the liver injury or promoting regeneration. Recent experimental studies indicated that natural products showed remarkable therapeutic effects against APAP hepatotoxicity due to their favorable efficacy. Therefore, this study aimed to review the present understanding of the immune response in AILI and attempted to establish ties among a series of inflammatory cascade reactions. Also, the immune molecular mechanisms of natural products in the treatment of AILI were extensively reviewed, thus providing a fundamental basis for exploring the potential pharmacological targets associated with immune interventions.
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Affiliation(s)
- Lihong Gong
- State Key Laboratory of Southwestern Chinese Medicine Resources, Key Laboratory of Standardization for Chinese Herbal Medicine, Ministry of Education, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Li Liao
- State Key Laboratory of Southwestern Chinese Medicine Resources, Key Laboratory of Standardization for Chinese Herbal Medicine, Ministry of Education, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Xuyang Dai
- State Key Laboratory of Southwestern Chinese Medicine Resources, Key Laboratory of Standardization for Chinese Herbal Medicine, Ministry of Education, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Xinyan Xue
- State Key Laboratory of Southwestern Chinese Medicine Resources, Key Laboratory of Standardization for Chinese Herbal Medicine, Ministry of Education, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Cheng Peng
- State Key Laboratory of Southwestern Chinese Medicine Resources, Key Laboratory of Standardization for Chinese Herbal Medicine, Ministry of Education, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China.
| | - Yunxia Li
- State Key Laboratory of Southwestern Chinese Medicine Resources, Key Laboratory of Standardization for Chinese Herbal Medicine, Ministry of Education, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China.
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10
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Wang Y, Liu Y. Neutrophil-Induced Liver Injury and Interactions Between Neutrophils and Liver Sinusoidal Endothelial Cells. Inflammation 2021; 44:1246-1262. [PMID: 33649876 DOI: 10.1007/s10753-021-01442-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Revised: 01/29/2021] [Accepted: 02/19/2021] [Indexed: 12/12/2022]
Abstract
Neutrophils are the most abundant type of leukocytes with diverse functions in immune defense including production of reactive oxygen species, bacteriocidal proteins, neutrophil extracellular traps, and pro-inflammatory mediators. However, aberrant accumulation of neutrophils in host tissues and excessive release of bacteriocidal compounds can lead to unexpected injury to host organs. Neutrophil-mediated liver injury has been reported in various types of liver diseases including liver ischemia/reperfusion injury, nonalcoholic fatty liver disease, endotoxin-induced liver injury, alcoholic liver disease, and drug-induced liver injury. Yet the mechanisms of neutrophil-induced hepatotoxicity in different liver diseases are complicated. Current knowledge of these mechanisms are summarized in this review. In addition, a substantial body of evidence has emerged showing that liver sinusoidal endothelial cells (LSECs) participate in several key steps of neutrophil-mediated liver injury including neutrophil recruitment, adhesion, transmigration, and activation. This review also highlights the current understanding of the interactions between LSECs and neutrophils in liver injury. The future challenge is to explore new targets for selectively interfering neutrophil-induced liver injury without impairing host defense function against microbial infection. Further understanding the role of LSECs in neutrophil-induced hepatotoxicity would aid in developing more selective therapeutic approaches for liver disease.
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Affiliation(s)
- Yang Wang
- Department of Gastroenterology, Peking University People's Hospital, No.11, Xizhimen South Street, Xicheng District, Beijing, 100044, China
- Clinical Center of Immune-Mediated Digestive Diseases, Peking University People's Hospital, No. 11, Xizhimen South Street, Xicheng District, Beijing, 100044, China
| | - Yulan Liu
- Department of Gastroenterology, Peking University People's Hospital, No.11, Xizhimen South Street, Xicheng District, Beijing, 100044, China.
- Clinical Center of Immune-Mediated Digestive Diseases, Peking University People's Hospital, No. 11, Xizhimen South Street, Xicheng District, Beijing, 100044, China.
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11
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Chang Y, Kim JW, Yang S, Chung DH, Ko JS, Moon JS, Kim HY. Increased GM-CSF-producing NCR - ILC3s and neutrophils in the intestinal mucosa exacerbate inflammatory bowel disease. Clin Transl Immunology 2021; 10:e1311. [PMID: 34262760 PMCID: PMC8264747 DOI: 10.1002/cti2.1311] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 04/30/2021] [Accepted: 06/18/2021] [Indexed: 01/08/2023] Open
Abstract
Objectives Inflammatory bowel disease (IBD) is characterised by dysregulated mucosal immune responses associated with genetic, environmental and microbial factors. Recent therapies targeting key inflammatory mediators such as tumor necrosis factor (TNF)‐α emphasise the importance of innate immunity in the development of IBD. Methods We examined the distribution of innate immune cells such as innate lymphoid cells (ILCs) and myeloid cells in the intestinal epithelium from children diagnosed as IBD and murine models of colitis induced by dextran sulphate sodium (DSS) or an anti‐CD40 antibodies. Results We found an increased number of type 3 ILCs (ILC3s) that do not express the natural cytotoxicity receptor (NCR) and neutrophils, in both human IBD patients and colitis‐induced mice. A co‐culture experiment of neutrophils with NCR‐ ILC3s revealed that NCR‐ ILC3s stimulate neutrophils by producing granulocyte–macrophage colony‐stimulating factor (GM‐CSF). Furthermore, a blockade of GM‐CSF could inhibit the development of IBD by inhibiting neutrophil activity. Conclusion The NCR‐ ILC3: GM‐CSF: neutrophil axis could contribute to the development of IBD.
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Affiliation(s)
- Yuna Chang
- Laboratory of Mucosal Immunology Department of Biomedical Sciences Seoul National University College of Medicine Seoul Korea
| | - Ju Whi Kim
- Department of Pediatrics Seoul National University College of Medicine Seoul Korea
| | - Siyoung Yang
- Department of Biomedical Sciences Ajou University Graduate School of Medicine Suwon Korea.,Department of Pharmacology Ajou University School of Medicine Suwon Korea
| | - Doo Hyun Chung
- Department of Pathology Seoul National University College of Medicine Seoul Korea.,Laboratory of Immune Regulation Department of Biomedical Sciences Seoul National University College of Medicine Seoul Korea
| | - Jae Sung Ko
- Department of Pediatrics Seoul National University College of Medicine Seoul Korea
| | - Jin Soo Moon
- Department of Pediatrics Seoul National University College of Medicine Seoul Korea
| | - Hye Young Kim
- Laboratory of Mucosal Immunology Department of Biomedical Sciences Seoul National University College of Medicine Seoul Korea.,Institute of Allergy and Clinical Immunology Seoul National University Medical Research Center Seoul Korea
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Yang L, Xie X, Li Y, Wu L, Fan C, Liang T, Xi Y, Yang S, Li H, Zhang J, Ding Y, Xue L, Chen M, Wang J, Wu Q. Evaluation of the Cholesterol-Lowering Mechanism of Enterococcus faecium Strain 132 and Lactobacillus paracasei Strain 201 in Hypercholesterolemia Rats. Nutrients 2021; 13:nu13061982. [PMID: 34207558 PMCID: PMC8228983 DOI: 10.3390/nu13061982] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 06/05/2021] [Accepted: 06/06/2021] [Indexed: 01/04/2023] Open
Abstract
Hypercholesterolemia can cause many diseases, but it can effectively regulated by Lactobacillus. This study aimed to evaluate the cholesterol-lowering mechanism of Enterococcus faecium strain 132 and Lactobacillusparacasei strain 201. These results showed that both the strains decreased serum total cholesterol (TC), low-density lipoprotein cholesterol (LDL-C), triglycerides (TG), liver TC and TG and increased fecal TC, TG and total bile acid (TBA) levels. Additionally, both strains also reduced glutamic-pyruvic transaminase (ALT), glutamic oxaloacetic transaminase (AST) and levels of tissue inflammation levels to improve the lipid profile, and they reduced fat accumulation partially by alleviating inflammatory responses. Furthermore, both strains regulated the expression of the CYP8B1, CYP7A1, SREBP-1, SCD1 and LDL-R gene to promote cholesterol metabolism and reduce TG accumulation. Interventions with both strains also altered the gut microbiota, and decreasing the abundance of Veillonellaceae, Erysipelotrichaceae and Prevotella. Furthermore, fecal acetic acid and propionic acid were increased by this intervention. Overall, the results suggested that E. faecium strain 132 and L. paracasei strain 201 can alleviate hypercholesterolemia in rats and might be applied as a new type of hypercholesterolemia agent in functional foods.
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Affiliation(s)
- Lingshuang Yang
- College of Food Science, South China Agricultural University, Guangzhou 510642, China;
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (X.X.); (Y.L.); (L.W.); (C.F.); (T.L.); (Y.X.); (S.Y.); (H.L.); (J.Z.); (Y.D.); (L.X.); (M.C.)
| | - Xinqiang Xie
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (X.X.); (Y.L.); (L.W.); (C.F.); (T.L.); (Y.X.); (S.Y.); (H.L.); (J.Z.); (Y.D.); (L.X.); (M.C.)
| | - Ying Li
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (X.X.); (Y.L.); (L.W.); (C.F.); (T.L.); (Y.X.); (S.Y.); (H.L.); (J.Z.); (Y.D.); (L.X.); (M.C.)
| | - Lei Wu
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (X.X.); (Y.L.); (L.W.); (C.F.); (T.L.); (Y.X.); (S.Y.); (H.L.); (J.Z.); (Y.D.); (L.X.); (M.C.)
| | - Congcong Fan
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (X.X.); (Y.L.); (L.W.); (C.F.); (T.L.); (Y.X.); (S.Y.); (H.L.); (J.Z.); (Y.D.); (L.X.); (M.C.)
| | - Tingting Liang
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (X.X.); (Y.L.); (L.W.); (C.F.); (T.L.); (Y.X.); (S.Y.); (H.L.); (J.Z.); (Y.D.); (L.X.); (M.C.)
| | - Yu Xi
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (X.X.); (Y.L.); (L.W.); (C.F.); (T.L.); (Y.X.); (S.Y.); (H.L.); (J.Z.); (Y.D.); (L.X.); (M.C.)
| | - Shuanghong Yang
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (X.X.); (Y.L.); (L.W.); (C.F.); (T.L.); (Y.X.); (S.Y.); (H.L.); (J.Z.); (Y.D.); (L.X.); (M.C.)
| | - Haixin Li
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (X.X.); (Y.L.); (L.W.); (C.F.); (T.L.); (Y.X.); (S.Y.); (H.L.); (J.Z.); (Y.D.); (L.X.); (M.C.)
| | - Jumei Zhang
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (X.X.); (Y.L.); (L.W.); (C.F.); (T.L.); (Y.X.); (S.Y.); (H.L.); (J.Z.); (Y.D.); (L.X.); (M.C.)
| | - Yu Ding
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (X.X.); (Y.L.); (L.W.); (C.F.); (T.L.); (Y.X.); (S.Y.); (H.L.); (J.Z.); (Y.D.); (L.X.); (M.C.)
| | - Liang Xue
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (X.X.); (Y.L.); (L.W.); (C.F.); (T.L.); (Y.X.); (S.Y.); (H.L.); (J.Z.); (Y.D.); (L.X.); (M.C.)
| | - Moutong Chen
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (X.X.); (Y.L.); (L.W.); (C.F.); (T.L.); (Y.X.); (S.Y.); (H.L.); (J.Z.); (Y.D.); (L.X.); (M.C.)
| | - Juan Wang
- College of Food Science, South China Agricultural University, Guangzhou 510642, China;
- Correspondence: (J.W.); (Q.W.)
| | - Qingping Wu
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (X.X.); (Y.L.); (L.W.); (C.F.); (T.L.); (Y.X.); (S.Y.); (H.L.); (J.Z.); (Y.D.); (L.X.); (M.C.)
- Correspondence: (J.W.); (Q.W.)
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Wang Z, Xu G, Wang H, Zhan X, Gao Y, Chen N, Li R, Song X, Guo Y, Yang R, Niu M, Wang J, Liu Y, Xiao X, Bai Z. Icariside Ⅱ, a main compound in Epimedii Folium, induces idiosyncratic hepatotoxicity by enhancing NLRP3 inflammasome activation. Acta Pharm Sin B 2020; 10:1619-1633. [PMID: 33088683 PMCID: PMC7564030 DOI: 10.1016/j.apsb.2020.03.006] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 02/20/2020] [Accepted: 03/09/2020] [Indexed: 12/12/2022] Open
Abstract
Idiosyncratic drug-induced liver injury (IDILI) is an infrequent but potentially serious disease that develops the main reason for post-marketing safety warnings and withdrawals of drugs. Epimedii Folium (EF), the widely used herbal medicine, has shown to cause idiosyncratic liver injury, but the underlying mechanisms are poorly understood. Increasing evidence has indicated that most cases of IDILI are immune mediated. Here, we report that icariside Ⅱ (ICS Ⅱ), the major active and metabolic constituent of EF, causes idiosyncratic liver injury by promoting NLRP3 inflammasome activation. ICS Ⅱ exacerbates NLRP3 inflammasome activation triggered by adenosine triphosphate (ATP) and nigericin, but not silicon dioxide (SiO2), monosodium urate (MSU) crystal or cytosolic lipopolysaccharide (LPS). Additionally, the activation of NLRC4 and AIM2 inflammasomes is not affected by ICS Ⅱ. Mechanistically, synergistic induction of mitochondrial reactive oxygen species (mtROS) is a crucial contributor to the enhancing effect of ICS Ⅱ on ATP- or nigericin-induced NLRP3 inflammasome activation. Importantly, in vivo data show that a combination of non-hepatotoxic doses of LPS and ICS Ⅱ causes the increase of aminotransferase activity, hepatic inflammation and pyroptosis, which is attenuated by Nlrp3 deficiency or pretreatment with MCC950 (a specific NLRP3 inflammasome inhibitor). In conclusion, these findings demonstrate that ICS Ⅱ causes idiosyncratic liver injury through enhancing NLRP3 inflammasome activation and suggest that ICS Ⅱ may be a risk factor and responsible for EF-induced liver injury.
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Affiliation(s)
- Zhilei Wang
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
- China Military Institute of Chinese Materia, the Fifth Medical Centre, Chinese PLA General Hospital, Beijing 100039, China
| | - Guang Xu
- China Military Institute of Chinese Materia, the Fifth Medical Centre, Chinese PLA General Hospital, Beijing 100039, China
| | - Hongbo Wang
- Department of Hepatobiliary Surgery Center, the Fifth Medical Centre, Chinese PLA General Hospital, Beijing 100039, China
| | - Xiaoyan Zhan
- China Military Institute of Chinese Materia, the Fifth Medical Centre, Chinese PLA General Hospital, Beijing 100039, China
| | - Yuan Gao
- School of Chinese Materia Medica, Capital Medical University, Beijing 100029, China
| | - Nian Chen
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Ruisheng Li
- Research Center for Clinical and Translational Medicine, the Fifth Medical Centre, Chinese PLA General Hospital, Beijing 100039, China
| | - Xueai Song
- Integrative Medical Center, the Fifth Medical Centre, Chinese PLA General Hospital, Beijing 100039, China
| | - Yuming Guo
- Integrative Medical Center, the Fifth Medical Centre, Chinese PLA General Hospital, Beijing 100039, China
| | - Ruichuang Yang
- Research Center for Clinical and Translational Medicine, the Fifth Medical Centre, Chinese PLA General Hospital, Beijing 100039, China
| | - Ming Niu
- China Military Institute of Chinese Materia, the Fifth Medical Centre, Chinese PLA General Hospital, Beijing 100039, China
| | - Jiabo Wang
- China Military Institute of Chinese Materia, the Fifth Medical Centre, Chinese PLA General Hospital, Beijing 100039, China
| | - Youping Liu
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
- Corresponding authors.
| | - Xiaohe Xiao
- China Military Institute of Chinese Materia, the Fifth Medical Centre, Chinese PLA General Hospital, Beijing 100039, China
- Integrative Medical Center, the Fifth Medical Centre, Chinese PLA General Hospital, Beijing 100039, China
- Corresponding authors.
| | - Zhaofang Bai
- China Military Institute of Chinese Materia, the Fifth Medical Centre, Chinese PLA General Hospital, Beijing 100039, China
- Corresponding authors.
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Yuan Z, Hasnat M, Liang P, Yuan Z, Zhang H, Sun L, Zhang L, Jiang Z. The role of inflammasome activation in Triptolide-induced acute liver toxicity. Int Immunopharmacol 2019; 75:105754. [PMID: 31352325 DOI: 10.1016/j.intimp.2019.105754] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 07/10/2019] [Accepted: 07/10/2019] [Indexed: 01/16/2023]
Abstract
Triptolide (TP), the major active compound derived from the traditional Chinese medicine Tripterygium wilfordii Hook. F, possesses an excellent pharmacological profile of immunomodulatory and anti-tumor activities. However, the application of TP was restricted due to its narrow therapeutic window and side effects, especially its hepatotoxicity. This study was designed to investigate the role of inflammasome in TP-induced acute liver toxicity. After the administration of TP at the dose of 600 μg/kg for 12 h or 24 h, we examined the serum biochemical parameters, liver histopathological changes, the expression of liver inflammatory factors, and the activation of NLRP3 inflammasome. Mice treated with TP displayed liver injury with a time-dependent increase of serum transaminases and activation of NLRP3 inflammasome, accompanied by the elevation of neutrophils infiltration. Further results implied that the activation of TLR4-Myd88-NF-κB pathway and oxidative stress induced by a single dose of TP (600 μg/kg) might participate in the activation of NLRP3 inflammasome. To investigate whether the activation of inflammasome participates in the liver damage induced by TP, a single dose of Ac-Yvad-Cmk (Caspase-1 inhibitor) was injected before TP administration. Ac-Yvad-Cmk pretreatment effectively prevented the increase of Cleaved Caspase-1 and inhibited the maturity of IL-1β. Additional studies revealed that Ac-Yvad-Cmk pretreatment decreased the recruitment of neutrophils and inhibited the production of massive pro-inflammatory factors. Taken together, our results revealed that activation of inflammasome aggravated the acute liver toxicity induced by TP. Inhibition of inflammasome could serve as a novel therapeutic target for the amelioration of TP-induced hepatotoxicity.
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Affiliation(s)
- Ziqiao Yuan
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing 210009, China
| | - Muhammad Hasnat
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing 210009, China; Institute of Pharmaceutical Sciences, University of Veterinary and Animal Sciences, Outfall road, Lahore, 54600, Pakistan
| | - Peishi Liang
- College of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Zihang Yuan
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing 210009, China
| | - Haoran Zhang
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing 210009, China
| | - Lixin Sun
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing 210009, China; Jiangsu Center for Pharmacodynamics Research and Evaluation, China Pharmaceutical University, Nanjing 210009, China
| | - Luyong Zhang
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing 210009, China; Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou 510006, China; State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, China.
| | - Zhenzhou Jiang
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing 210009, China; Key Laboratory of Drug Quality Control and Pharmacovigilance (China Pharmaceutical University), Ministry of Education, Nanjing 21009, China.
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16
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Forsthuber A, Lipp K, Andersen L, Ebersberger S, Graña-Castro 'O, Ellmeier W, Petzelbauer P, Lichtenberger BM, Loewe R. CXCL5 as Regulator of Neutrophil Function in Cutaneous Melanoma. J Invest Dermatol 2019; 139:186-194. [PMID: 30009831 DOI: 10.1016/j.jid.2018.07.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Revised: 06/15/2018] [Accepted: 07/01/2018] [Indexed: 12/30/2022]
Abstract
Chemokines mold the tumor microenvironment by recruiting distinct immune cell populations, thereby strongly influencing disease progression. Previously, we showed that CXCL5 expression is upregulated in advanced stages of primary melanomas, which correlates with the presence of neutrophils in the tumor. The analysis of neutrophil populations in various tissues revealed a distinct phenotype of tumor-associated neutrophils. Tumor-associated neutrophils expressed PD-L1, CXCR4, CCR5, Adam17, and Nos2 and were immunosuppressive in a T-cell proliferation assay. To investigate the impact of CXCL5 and neutrophils in vivo, we established a syngeneic mouse tumor transplantation model using CXCL5-overexpressing and control melanoma cell lines. Growth behavior or vascularization of primary tumors was not affected by CXCL5 expression and neutrophils alone. However, in combination with Poly(I:C), tumor-associated neutrophils were able to attenuate induced antitumoral T-cell responses. CXCL5-overexpressing tumors had reduced lung metastasis compared with control tumors. Neutrophil depletion reversed this effect. In vitro, unstimulated lung-derived neutrophils had higher levels of reactive oxygen species compared with tumor-associated neutrophils, and CXCL5 stimulation further increased reactive oxygen species levels. In summary, in melanoma, neutrophils play a context-dependent role that is influenced by local or systemic factors, and interfere with therapies activating the acquired immune system. Actively switching neutrophils into antitumorigenic mode might be a new therapeutic strategy.
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Affiliation(s)
- Agnes Forsthuber
- Skin and Endothelium Research Division (SERD), Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Katharina Lipp
- Skin and Endothelium Research Division (SERD), Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Liisa Andersen
- Institute of Immunology Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
| | | | - 'Osvaldo Graña-Castro
- Bioinformatics Unit, Structural Biology and Biocomputing Programme, Spanish National Cancer Research Centre (CNIO), Madrid, Spain
| | - Wilfried Ellmeier
- Institute of Immunology Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
| | - Peter Petzelbauer
- Skin and Endothelium Research Division (SERD), Department of Dermatology, Medical University of Vienna, Vienna, Austria; Division of General Dermatology and Dermatooncology, Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Beate M Lichtenberger
- Skin and Endothelium Research Division (SERD), Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Robert Loewe
- Skin and Endothelium Research Division (SERD), Department of Dermatology, Medical University of Vienna, Vienna, Austria; Division of General Dermatology and Dermatooncology, Department of Dermatology, Medical University of Vienna, Vienna, Austria.
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Ahmad S, Ramadori G, Moriconi F. Modulation of Chemokine- and Adhesion-Molecule Gene Expression and Recruitment of Neutrophil Granulocytes in Rat and Mouse Liver after a Single Gadolinium Chloride or Zymosan Treatment. Int J Mol Sci 2018; 19:ijms19123891. [PMID: 30563093 PMCID: PMC6321201 DOI: 10.3390/ijms19123891] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Revised: 11/26/2018] [Accepted: 12/03/2018] [Indexed: 12/29/2022] Open
Abstract
Kupffer cells are professional phagocytes of the liver clearing bacteria from portal blood. Their clearance capacity, however, can be overwhelmed, transforming them into critical mediators of hepatic-injury. We investigated the consequences of selective Kupffer cell-overload by intraperitoneally administering pyrogen-free gadolinium chloride (GdCl₃) or Zymosan into rats and into endotoxin-resistant mice (C3H/HeJ). The number of myeloperoxidase-positive (MPO⁺) cells increased at 3 h mainly around the portal vessel after both GdCl₃ and Zymosan treatment. Simultaneously, GdCl₃ administration reduced detectability of ED-1⁺ (but not ED-2) cells near the portal vessel. Serum chemokine (C-X-C motif) ligand 1 (CXCL-1), CXCL-2 and chemokine (C-C motif) ligand 2 (CCL-2) showed a peak at 3 h after both treatment regimens although at a higher extent after Zymosan administration. Accordingly, CXCL-1, CXCL-5 and CCL-2 gene expression in the liver was up-regulated after GdCl₃ treatment at 3 h. After Zymosan administration a significant up-regulation of CXCL-1, CXCL-2, CXCL-10, CCL-2, CCL-3 and CCL-20 gene expression in liver at 3 h was observed. After Zymosan administration intracellular adhesion molecule 1 (ICAM-1) and vascular cell adhesion molecule 1 (VCAM-1) gene expression was up-regulated in rat liver tissue. In C3H/HeJ mice both treatment regimens up-regulated CCL-2 and ICAM-1 gene expression after 3 h and down-regulated platelet endothelial cell adhesion molecule 1 (PECAM-1) gene expression. In conclusion, phagocytosis overload of Kupffer cells causes induction of several CXC, CC-chemokines, upregulation of "positive" adhesion molecule gene expression, down-regulation of the "negative" adhesion molecule PECAM-1 and a recruitment of neutrophil granulocytes in the portal area of the liver of treated rats and mice mainly in close contact to the liver macrophages.
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Affiliation(s)
- Shakil Ahmad
- Department of Gastroenterology and Endocrinology, University Hospital, Georg-August University Goettingen, 37075 Goettingen, Germany.
- Department of Cardiology and Pneumology, University Hospital, Georg-August University Goettingen, 37075 Goettingen, Germany.
| | - Giuliano Ramadori
- Department of Gastroenterology and Endocrinology, University Hospital, Georg-August University Goettingen, 37075 Goettingen, Germany.
| | - Federico Moriconi
- Department of Gastroenterology and Endocrinology, University Hospital, Georg-August University Goettingen, 37075 Goettingen, Germany.
- GastroCentro, Via Trevano 38, 6900 Lugano, Switzerland.
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Mohamed YS, Ahmed LA, Salem HA, Agha AM. Role of nitric oxide and KATP channel in the protective effect mediated by nicorandil in bile duct ligation-induced liver fibrosis in rats. Biochem Pharmacol 2018. [DOI: 10.1016/j.bcp.2018.03.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Papackova Z, Heczkova M, Dankova H, Sticova E, Lodererova A, Bartonova L, Poruba M, Cahova M. Silymarin prevents acetaminophen-induced hepatotoxicity in mice. PLoS One 2018; 13:e0191353. [PMID: 29342206 PMCID: PMC5771617 DOI: 10.1371/journal.pone.0191353] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Accepted: 01/03/2018] [Indexed: 12/20/2022] Open
Abstract
Acetaminophen or paracetamol (APAP) overdose is a common cause of liver injury. Silymarin (SLM) is a hepatoprotective agent widely used for treating liver injury of different origin. In order to evaluate the possible beneficial effects of SLM, Balb/c mice were pretreated with SLM (100 mg/kg b.wt. per os) once daily for three days. Two hours after the last SLM dose, the mice were administered APAP (300 mg/kg b.wt. i.p.) and killed 6 (T6), 12 (T12) and 24 (T24) hours later. SLM-treated mice exhibited a significant reduction in APAP-induced liver injury, assessed according to AST and ALT release and histological examination. SLM treatment significantly reduced superoxide production, as indicated by lower GSSG content, lower HO-1 induction, alleviated nitrosative stress, decreased p-JNK activation and direct measurement of mitochondrial superoxide production in vitro. SLM did not affect the APAP-induced decrease in CYP2E1 activity and expression during the first 12 hrs. Neutrophil infiltration and enhanced expression of inflammatory markers were first detected at T12 in both groups. Inflammation progressed in the APAP group at T24 but became attenuated in SLM-treated animals. Histological examination suggests that necrosis the dominant cell death pathway in APAP intoxication, which is partially preventable by SLM pretreatment. We demonstrate that SLM significantly protects against APAP-induced liver damage through the scavenger activity of SLM and the reduction of superoxide and peroxynitrite content. Neutrophil-induced damage is probably secondary to necrosis development.
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Affiliation(s)
- Zuzana Papackova
- Department of Metabolism and Diabetes, Institute for Clinical and Experimental Medicine, Prague, Czech Republic
- Department of Veterinary Science, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic
- * E-mail:
| | - Marie Heczkova
- Department of Metabolism and Diabetes, Institute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Helena Dankova
- Department of Metabolism and Diabetes, Institute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Eva Sticova
- Clinical and Transplant Pathology Department, Institute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Alena Lodererova
- Clinical and Transplant Pathology Department, Institute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Lenka Bartonova
- Clinical and Transplant Pathology Department, Institute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Martin Poruba
- Department of Pharmacology, Faculty of Medicine and Dentistry, Palacky University Olomouc, Olomouc, Czech Republic
| | - Monika Cahova
- Department of Metabolism and Diabetes, Institute for Clinical and Experimental Medicine, Prague, Czech Republic
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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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21
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Ding WX, Jaeschke H. Autophagy in macrophages regulates the inflammasome and protects against liver injury. J Hepatol 2016; 64:16-8. [PMID: 26456339 PMCID: PMC4888871 DOI: 10.1016/j.jhep.2015.10.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Revised: 10/01/2015] [Accepted: 10/05/2015] [Indexed: 01/08/2023]
Affiliation(s)
- Wen-Xing Ding
- Department of Pharmacology, Toxicology and Therapeutics, University of Kansas Medical Center, Kansas City, KS 66160, USA.
| | - Hartmut Jaeschke
- Department of Pharmacology, Toxicology and Therapeutics, University of Kansas Medical Center, Kansas City, KS 66160, USA.
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Maes M, Vinken M, Jaeschke H. Experimental models of hepatotoxicity related to acute liver failure. Toxicol Appl Pharmacol 2016; 290:86-97. [PMID: 26631581 PMCID: PMC4691574 DOI: 10.1016/j.taap.2015.11.016] [Citation(s) in RCA: 133] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Revised: 11/19/2015] [Accepted: 11/24/2015] [Indexed: 12/13/2022]
Abstract
Acute liver failure can be the consequence of various etiologies, with most cases arising from drug-induced hepatotoxicity in Western countries. Despite advances in this field, the management of acute liver failure continues to be one of the most challenging problems in clinical medicine. The availability of adequate experimental models is of crucial importance to provide a better understanding of this condition and to allow identification of novel drug targets, testing the efficacy of new therapeutic interventions and acting as models for assessing mechanisms of toxicity. Experimental models of hepatotoxicity related to acute liver failure rely on surgical procedures, chemical exposure or viral infection. Each of these models has a number of strengths and weaknesses. This paper specifically reviews commonly used chemical in vivo and in vitro models of hepatotoxicity associated with acute liver failure.
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Affiliation(s)
- Michaël Maes
- Department of In Vitro Toxicology and Dermato-Cosmetology, Vrije Universiteit Brussel, Brussels, Belgium
| | - Mathieu Vinken
- Department of In Vitro Toxicology and Dermato-Cosmetology, Vrije Universiteit Brussel, Brussels, Belgium.
| | - Hartmut Jaeschke
- Department of Pharmacology, Toxicology and Therapeutics, University of Kansas Medical Center, Kansas City, United States
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Merza M, Hartman H, Rahman M, Hwaiz R, Zhang E, Renström E, Luo L, Mörgelin M, Regner S, Thorlacius H. Neutrophil Extracellular Traps Induce Trypsin Activation, Inflammation, and Tissue Damage in Mice With Severe Acute Pancreatitis. Gastroenterology 2015; 149:1920-1931.e8. [PMID: 26302488 DOI: 10.1053/j.gastro.2015.08.026] [Citation(s) in RCA: 171] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 08/13/2015] [Accepted: 08/15/2015] [Indexed: 12/14/2022]
Abstract
BACKGROUND & AIMS Neutrophils are involved in the development of acute pancreatitis (AP), but it is not clear how neutrophil-induced tissue damage is regulated. In addition to secreting antimicrobial compounds, activated neutrophils eliminate invading microorganisms by expelling nuclear DNA and histones to form extracellular web-like structures called neutrophil extracellular traps (NETs). However, NETs have been reported to contribute to organ dysfunction in patients with infectious diseases. We investigated whether NETs contribute to the development of AP in mice. METHODS AP was induced in C57BL/6 mice by infusion of taurocholate into the pancreatic duct or by intraperitoneal administration of L-arginine. Pancreata were collected and extracellular DNA was detected by Sytox green staining, levels of CXC chemokines, histones, and cytokines also were measured. Cell-free DNA was quantified in plasma samples. Signal transducer and activator of transcription 3 phosphorylation and trypsin activation were analyzed in isolated acinar cells. NETs were depleted by administration of DNase I to mice. Plasma was obtained from healthy individuals (controls) and patients with severe AP. RESULTS Infusion of taurocholate induced formation of NETs in pancreatic tissues of mice and increased levels of cell-free DNA in plasma. Neutrophil depletion prevented taurocholate-induced deposition of NETs in the pancreas. Administration of DNase I to mice reduced neutrophil infiltration and tissue damage in the inflamed pancreas and lung, and decreased levels of blood amylase, macrophage inflammatory protein-2, interleukin 6, and high-mobility groups protein 1. In mice given taurocholate, DNase I administration also reduced expression of integrin α M (macrophage-1 antigen) on circulating neutrophils. Similar results occurred in mice with L-arginine-induced AP. Addition of NETs and histones to acinar cells induced formation of trypsin and activation of signal transducer and activator of transcription 3; these processes were blocked by polysialic acid. Patients with severe AP had increased plasma levels of NET components compared with controls. CONCLUSIONS NETs form in the pancreata of mice during the development of AP, and NET levels are increased in plasma from patients with AP, compared with controls. NETs regulate organ inflammation and injury in mice with AP, and might be targeted to reduce pancreatic tissue damage and inflammation in patients.
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Affiliation(s)
- Mohammed Merza
- Section of Surgery, Department of Clinical Sciences, Malmö, Sweden
| | - Hannes Hartman
- Section of Surgery, Department of Clinical Sciences, Malmö, Sweden
| | - Milladur Rahman
- Section of Surgery, Department of Clinical Sciences, Malmö, Sweden
| | - Rundk Hwaiz
- Section of Surgery, Department of Clinical Sciences, Malmö, Sweden
| | - Enming Zhang
- Section of Islet Pathophysiology, Department of Clinical Sciences, Malmö, Sweden
| | - Erik Renström
- Section of Islet Pathophysiology, Department of Clinical Sciences, Malmö, Sweden
| | - Lingtao Luo
- Section of Surgery, Department of Clinical Sciences, Malmö, Sweden
| | - Matthias Mörgelin
- Division of Infection Medicine, Department of Clinical Sciences, Lund University, Lund, Sweden
| | - Sara Regner
- Section of Surgery, Department of Clinical Sciences, Malmö, Sweden
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Woolbright BL, Jaeschke H. Therapeutic targets for cholestatic liver injury. Expert Opin Ther Targets 2015; 20:463-75. [PMID: 26479335 DOI: 10.1517/14728222.2016.1103735] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
INTRODUCTION Cholestasis is a reduction in bile flow that occurs during numerous pathologies. Blockage of the biliary tracts results in hepatic accumulation of bile acids or their conjugate bile salts. The molecular mechanisms behind liver injury associated with cholestasis are extensively studied, but not well understood. Multiple models of obstructive cholestasis result in a significant inflammatory infiltrate at the sites of necrosis that characterize the injury. AREAS COVERED This review will focus on direct bile acid toxicity during cholestasis, bile acid signaling processes and on the development and continuation of inflammation during cholestasis, with a focus on novel proposed molecular mediators of neutrophil recruitment. While significant progress has been made on these molecular mechanisms, a continued focus on how cholestasis and the innate immune system interact is necessary to discover targetable therapeutics that might protect the liver while leaving global immunity intact. EXPERT OPINION While bile acid toxicity likely occurs in humans and other mammals when toxic bile acids accumulate, persistent inflammation is likely responsible for continued liver injury during obstructive cholestasis. Targeting molecular mediators of inflammation may help prevent liver injury during acute cholestasis both in murine models and human patients.
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Affiliation(s)
- Benjamin L Woolbright
- a Department of Pharmacology , Toxicology & Therapeutics, University of Kansas Medical Center , 3901 Rainbow Blvd, MS 1018, Kansas City , KS , 66160 USA
| | - Hartmut Jaeschke
- a Department of Pharmacology , Toxicology & Therapeutics, University of Kansas Medical Center , 3901 Rainbow Blvd, MS 1018, Kansas City , KS , 66160 USA
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Geng Y, Ma Q, Liu YN, Peng N, Yuan FF, Li XG, Li M, Wu YS, Li BL, Song WB, Zhu W, Xu WW, Fan J, Su L. Heatstroke induces liver injury via IL-1β and HMGB1-induced pyroptosis. J Hepatol 2015; 63:622-33. [PMID: 25931416 DOI: 10.1016/j.jhep.2015.04.010] [Citation(s) in RCA: 126] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Revised: 03/28/2015] [Accepted: 04/02/2015] [Indexed: 01/06/2023]
Abstract
BACKGROUND & AIMS Liver injury is a common complication of heat stroke (HS), and often constitutes a direct cause for patient death. The cellular and molecular mechanism underlying HS-induced liver injury remains unclear. Recent evidence indicates that inflammasome plays an important role in mediating sterile inflammation triggered by tissue damage. Using a rat HS model, we identified a novel mechanism by which inflammasome-dependent interleukin-1β (IL-1β) activation and hepatocyte pyroptosis mediate HS-induced liver injury. METHODS To induce HS, rats were subjected to heat exposure. Inhibition of inflammasomes was achieved by RNA silencing and pharmacologic inhibitor prior to heat exposure. Inflammasome assembly, caspase-1 activation, histological changes, as well as serum levels of liver enzymes were measured. RESULTS We demonstrated that the onset of HS activated inflammasome in the liver as evidenced by increased capase-1 activity and the association of inflammasome components NOD-like receptor family pyrin domain containing 3 (Nlrp3) and apoptosis speck-like protein containing a caspase-recruitment domain (ASC); and the activated inflammasome, in turn, induced IL-1β activation and hepatocyte pyroptosis, and subsequent augmented liver injury. HS-induced hepatocyte inflammasome activation seems to be high-mobility group box 1 (HMGB1) dependent. Inhibition of Nlrp3, caspase-1, or HMGB1 prevented HS-induced liver inflammation and ameliorated liver injury. CONCLUSIONS These findings demonstrate an important role of HMGB1 in mediating inflammasome activation in the development of liver injury following HS, and suggest that targeting inflammasome may represent a novel therapeutic strategy to limit cell death and prevent liver failure after HS.
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Affiliation(s)
- Yan Geng
- Department of Gastroenterology, 303 Hospital of People's Liberation Army, Nanning 530021, PR China; Department of Intensive Care Unit, General Hospital of Guangzhou Military Command, Guangzhou 510010, PR China.
| | - Qiang Ma
- State Key Laboratory of Organ Failure Research, Institute of Antibody Engineering, Southern Medical University, Guangzhou 510515, PR China.
| | - Ya-Nan Liu
- Department of Graduate School, Southern Medical University, Guangzhou 510515, PR China
| | - Na Peng
- Department of Graduate School, Southern Medical University, Guangzhou 510515, PR China; Department of Intensive Care Unit, General Hospital of Guangzhou Military Command, Guangzhou 510010, PR China
| | - Fang-Fang Yuan
- Department of Graduate School, Southern Medical University, Guangzhou 510515, PR China; Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA
| | - Xing-Gui Li
- Department of Neurology, The Fifth People's Hospital of Chongqing, Chongqing 400062, PR China; Department of Intensive Care Unit, General Hospital of Guangzhou Military Command, Guangzhou 510010, PR China
| | - Ming Li
- State Key Laboratory of Organ Failure Research, Institute of Antibody Engineering, Southern Medical University, Guangzhou 510515, PR China
| | - Ying-Song Wu
- State Key Laboratory of Organ Failure Research, Institute of Antibody Engineering, Southern Medical University, Guangzhou 510515, PR China
| | - Bing-ling Li
- Department of Intensive Care Unit, General Hospital of Guangzhou Military Command, Guangzhou 510010, PR China
| | - Wei-bing Song
- Department of Intensive Care Unit, General Hospital of Guangzhou Military Command, Guangzhou 510010, PR China
| | - Wei Zhu
- Department of Toxicology, Guangzhou Center for Disease Control and Prevention, Guangzhou 510515, PR China
| | - Wei-Wen Xu
- State Key Laboratory of Organ Failure Research, Institute of Antibody Engineering, Southern Medical University, Guangzhou 510515, PR China
| | - Jie Fan
- Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA.
| | - Lei Su
- Department of Intensive Care Unit, General Hospital of Guangzhou Military Command, Guangzhou 510010, PR China.
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Woolbright BL, Jaeschke H. Xenobiotic and Endobiotic Mediated Interactions Between the Cytochrome P450 System and the Inflammatory Response in the Liver. ADVANCES IN PHARMACOLOGY (SAN DIEGO, CALIF.) 2015; 74:131-61. [PMID: 26233906 DOI: 10.1016/bs.apha.2015.04.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The liver is a unique organ in the body as it has significant roles in both metabolism and innate immune clearance. Hepatocytes in the liver carry a nearly complete complement of drug metabolizing enzymes, including numerous cytochrome P450s. While a majority of these enzymes effectively detoxify xenobiotics, or metabolize endobiotics, a subportion of these reactions result in accumulation of metabolites that can cause either direct liver injury or indirect liver injury through activation of inflammation. The liver also contains multiple populations of innate immune cells including the resident macrophages (Kupffer cells), a relatively large number of natural killer cells, and blood-derived neutrophils. While these cells are primarily responsible for clearance of pathogens, activation of these immune cells can result in significant tissue injury during periods of inflammation. When activated chronically, these inflammatory bouts can lead to fibrosis, cirrhosis, cancer, or death. This chapter will focus on interactions between how the liver processes xenobiotic and endobiotic compounds through the cytochrome P450 system, and how these processes can result in a response from the innate immune cells of the liver. A number of different clinically relevant diseases, as well as experimental models, are currently available to study mechanisms related to the interplay of innate immunity and cytochrome P450-mediated metabolism. A major focus of the chapter will be to evaluate currently understood mechanisms in the context of these diseases, as a way of outlining mechanisms that dictate the interactions between the P450 system and innate immunity.
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Affiliation(s)
- Benjamin L Woolbright
- Department of Pharmacology, Toxicology and Therapeutics, Kansas University Medical Center, Kansas City, Kansas, USA
| | - Hartmut Jaeschke
- Department of Pharmacology, Toxicology and Therapeutics, Kansas University Medical Center, Kansas City, Kansas, USA.
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Abstract
BACKGROUND Transplants cause ischemia-reperfusion (IR) injury that can affect distant organs. Liver is particularly sensitive to IR injury. The present randomized experimental study was designed to investigate a possible protective effect of sevoflurane against liver inflammatory response to lung IR in a lung upper lobe left autotransplant model. METHODS Two groups (sevoflurane and control) of eight swines each were submitted to upper lobe left lung autotransplant. Hypnotic maintenance was performed with sevoflurane 3% or propofol 8 to 10 mg/kg per hr until pneumonectomy was done; then propofol was used for all animals. Blood and liver samples were taken in four different moments: prepneumonectomy, prereperfusion, 10 min postreperfusion and 30 min postreperfusion to measure levels of interleukin (IL)-1β, IL-10, tumor necrosis factor (TNF)-α, monocyte chemotactic protein (MCP)-1, nuclear factor (NF)-κB, C-reactive protein, ferritin and caspase 3. Non-parametric test was used to find statistical meaning. RESULTS Lung IR markedly increased the expression of TNF-α, IL-1β, MCP-1, NF-κB and caspase activity in control livers compared with basal levels, whereas liver IL-10 expression decreased 10 and 30 min post-reperfusion. Sevoflurane significantly decreased TNF-α, IL-1β, MCP-1, NF-κB liver expression and caspase 3 activity. Sevoflurane also reverted the lung IR-induced decrease in IL-10 expression. CONCLUSIONS The present results indicate that lung IR caused hepatic injury. Sevoflurane attenuated liver injury in a model of upper lobe left lung autotransplant in pigs.
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Helicobacter hepaticus induces an inflammatory response in primary human hepatocytes. PLoS One 2014; 9:e99713. [PMID: 24932686 PMCID: PMC4059665 DOI: 10.1371/journal.pone.0099713] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2014] [Accepted: 05/18/2014] [Indexed: 12/22/2022] Open
Abstract
Helicobacter hepaticus can lead to chronic hepatitis and hepatocellular carcinoma in certain strains of mice. Until now the pathogenic role of Helicobacter species on human liver tissue is still not clarified though Helicobacter species identification in human liver cancer was successful in case controlled studies. Therefore we established an in vitro model to investigate the interaction of primary human hepatocytes (PHH) with Helicobacter hepaticus. Successful co-culturing of PHH with Helicobacter hepaticus was confirmed by visualization of motile bacteria by two-photon-microscopy. Isolated human monocytes were stimulated with PHH conditioned media. Changes in mRNA expression of acute phase cytokines and proteins in PHH and stimulated monocytes were determined by Real-time PCR. Furthermore, cytokines and proteins were analyzed in PHH culture supernatants by ELISA. Co-cultivation with Helicobacter hepaticus induced mRNA expression of Interleukin-1 beta (IL-1β), Tumor necrosis factor-alpha, Interleukin-8 (IL-8) and Monocyte chemotactic protein-1 (MCP-1) in PHH (p<0.05) resulting in a corresponding increase of IL-8 and MCP-1 concentrations in PHH supernatants (p<0.05). IL-8 and IL-1β mRNA expression was induced in monocytes stimulated with Helicobacter hepaticus infected PHH conditioned media (p<0.05). An increase of Cyclooxygenase-2 mRNA expression was observed, with a concomitant increase of prostaglandin E2 concentration in PHH supernatants at 24 and 48 h (p<0.05). In contrast, at day 7 of co-culture, no persistent elevation of cytokine mRNA could be detected. High expression of intercellular adhesion molecule-1 on PHH cell membranes after co-culture was shown by two-photon-microscopy and confirmed by flow-cytomety. Finally, expression of Cytochrome P450 3A4 and albumin mRNA were downregulated, indicating an impairment of hepatocyte synthesis function by Helicobacter hepaticus presence. This is the first in vitro model demonstrating a pathogenic effect of a Helicobacter spp. on human liver cells, resulting in an inflammatory response with increased synthesis of inflammatory mediators and consecutive monocyte activation.
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Xu R, Huang H, Zhang Z, Wang FS. The role of neutrophils in the development of liver diseases. Cell Mol Immunol 2014. [PMID: 24633014 DOI: 10.1038/cmi.204.2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Liver disease encompasses a wide variety of liver conditions, including liver failure, liver cirrhosis and a spectrum of acute and chronic hepatitis, such as alcoholic, fatty, drug, viral and chronic hepatitis. Liver injury is a primary causative factor in liver disease; generally, these factors include direct liver damage and immune-mediated liver injury. Neutrophils (also known as neutrophilic granulocytes or polymorphonuclear leukocytes (PMNs)) are the most abundant circulating white blood cell type in humans, and PMNs are a major innate immune cell subset. Inappropriate activation and homing of neutrophils to the microvasculature contributes to the pathological manifestations of many types of liver disease. This review summarizes novel concepts of neutrophil-mediated liver injury that are based on current clinical and animal model studies.
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Affiliation(s)
- Ruonan Xu
- The Institute of Translational Hepatology, Research Center for Biological Therapy, Beijing 302 Hospital, Beijing, China
| | - Huihuang Huang
- The Institute of Intensive Care Unit, Beijing 302 Hospital, Beijing, China
| | - Zheng Zhang
- The Institute of Translational Hepatology, Research Center for Biological Therapy, Beijing 302 Hospital, Beijing, China
| | - Fu-Sheng Wang
- The Institute of Translational Hepatology, Research Center for Biological Therapy, Beijing 302 Hospital, Beijing, China
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Xu R, Huang H, Zhang Z, Wang FS. The role of neutrophils in the development of liver diseases. Cell Mol Immunol 2014; 11:224-31. [PMID: 24633014 DOI: 10.1038/cmi.2014.2] [Citation(s) in RCA: 167] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Revised: 01/07/2014] [Accepted: 01/07/2014] [Indexed: 12/12/2022] Open
Abstract
Liver disease encompasses a wide variety of liver conditions, including liver failure, liver cirrhosis and a spectrum of acute and chronic hepatitis, such as alcoholic, fatty, drug, viral and chronic hepatitis. Liver injury is a primary causative factor in liver disease; generally, these factors include direct liver damage and immune-mediated liver injury. Neutrophils (also known as neutrophilic granulocytes or polymorphonuclear leukocytes (PMNs)) are the most abundant circulating white blood cell type in humans, and PMNs are a major innate immune cell subset. Inappropriate activation and homing of neutrophils to the microvasculature contributes to the pathological manifestations of many types of liver disease. This review summarizes novel concepts of neutrophil-mediated liver injury that are based on current clinical and animal model studies.
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Affiliation(s)
- Ruonan Xu
- The Institute of Translational Hepatology, Research Center for Biological Therapy, Beijing 302 Hospital, Beijing, China
| | - Huihuang Huang
- The Institute of Intensive Care Unit, Beijing 302 Hospital, Beijing, China
| | - Zheng Zhang
- The Institute of Translational Hepatology, Research Center for Biological Therapy, Beijing 302 Hospital, Beijing, China
| | - Fu-Sheng Wang
- The Institute of Translational Hepatology, Research Center for Biological Therapy, Beijing 302 Hospital, Beijing, China
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Williams CD, Bajt ML, Sharpe MR, McGill MR, Farhood A, Jaeschke H. Neutrophil activation during acetaminophen hepatotoxicity and repair in mice and humans. Toxicol Appl Pharmacol 2014; 275:122-33. [PMID: 24440789 DOI: 10.1016/j.taap.2014.01.004] [Citation(s) in RCA: 127] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Revised: 01/03/2014] [Accepted: 01/08/2014] [Indexed: 12/17/2022]
Abstract
Following acetaminophen (APAP) overdose there is an inflammatory response triggered by the release of cellular contents from necrotic hepatocytes into the systemic circulation which initiates the recruitment of neutrophils into the liver. It has been demonstrated that neutrophils do not contribute to APAP-induced liver injury, but their role and the role of NADPH oxidase in injury resolution are controversial. C57BL/6 mice were subjected to APAP overdose and neutrophil activation status was determined during liver injury and liver regeneration. Additionally, human APAP overdose patients (ALT: >800 U/L) had serial blood draws during the injury and recovery phases for the determination of neutrophil activation. Neutrophils in the peripheral blood of mice showed an increasing activation status (CD11b expression and ROS priming) during and after the peak of injury but returned to baseline levels prior to complete injury resolution. Hepatic sequestered neutrophils showed an increased and sustained CD11b expression, but no ROS priming was observed. Confirming that NADPH oxidase is not critical to injury resolution, gp91(phox)⁻/⁻ mice following APAP overdose displayed no alteration in injury resolution. Peripheral blood from APAP overdose patients also showed increased neutrophil activation status after the peak of liver injury and remained elevated until discharge from the hospital. In mice and humans, markers of activation, like ROS priming, were increased and sustained well after active liver injury had subsided. The similar findings between surviving patients and mice indicate that neutrophil activation may be a critical event for host defense or injury resolution following APAP overdose, but not a contributing factor to APAP-induced injury.
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Affiliation(s)
- C David Williams
- Department of Pharmacology, Toxicology & Therapeutics, University of Kansas Medical Center, Kansas City, KS, USA
| | - Mary Lynn Bajt
- Department of Pharmacology, Toxicology & Therapeutics, University of Kansas Medical Center, Kansas City, KS, USA
| | - Matthew R Sharpe
- Department of Internal Medicine, University of Kansas Hospital, Kansas City, KS, USA
| | - Mitchell R McGill
- Department of Pharmacology, Toxicology & Therapeutics, University of Kansas Medical Center, Kansas City, KS, USA
| | - Anwar Farhood
- Department of Pathology, St. David's North Austin Medical Center, Austin, TX 78756, USA
| | - Hartmut Jaeschke
- Department of Pharmacology, Toxicology & Therapeutics, University of Kansas Medical Center, Kansas City, KS, USA.
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Yang M, Ramachandran A, Yan HM, Woolbright BL, Copple BL, Fickert P, Trauner M, Jaeschke H. Osteopontin is an initial mediator of inflammation and liver injury during obstructive cholestasis after bile duct ligation in mice. Toxicol Lett 2013; 224:186-95. [PMID: 24188933 DOI: 10.1016/j.toxlet.2013.10.030] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2013] [Revised: 10/24/2013] [Accepted: 10/25/2013] [Indexed: 12/13/2022]
Abstract
Osteopontin (OPN) is a chemotactic factor which can be cleaved to the pro-inflammatory form by matrix metalloproteinases (MMPs). To test the hypothesis that OPN can modulate inflammatory liver injury during cholestasis, wild-type (WT) C57BL/6 and OPN knockout (OPN-KO) mice underwent bile duct ligation (BDL). OPN-KO mice showed significant reduction in liver injury (plasma ALT and necrosis) and neutrophil recruitment compared with WT animals at 24h but not 72h after BDL. In WT mice, a 4-fold increase in hepatic MMP-3 mRNA and elevated MMP activities and cleaved OPN levels were observed in bile. WT mice subjected to BDL in the presence of the MMP inhibitor BB-94 showed reduced liver injury, less neutrophil extravasation and diminished levels of cleaved OPN in bile. Thus, during obstructive cholestasis, OPN released from biliary epithelial cells could be cleaved by MMPs in bile. When the biliary system leaks, cleaved OPN enters the parenchyma and attracts neutrophils. In the absence of OPN, other chemoattractants, e.g. chemokines, mediate a delayed inflammatory response and injury. Taken together, our data suggest that OPN is the pro-inflammatory mediator that initiates the early neutrophil-mediated injury phase during obstructive cholestasis in mice.
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Affiliation(s)
- Min Yang
- Department of Pharmacology, Toxicology & Therapeutics, University of Kansas Medical Center, Kansas City, KS, USA
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Involvement of oxidative stress and immune- and inflammation-related factors in azathioprine-induced liver injury. Toxicol Lett 2013; 224:215-24. [PMID: 24184165 DOI: 10.1016/j.toxlet.2013.10.025] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2013] [Revised: 10/23/2013] [Accepted: 10/23/2013] [Indexed: 11/21/2022]
Abstract
Drug-induced liver injury (DILI) is a growing concern in the fields of drug development and clinical drug therapy because numerous drugs have been linked to hepatotoxicity. However, it is difficult to predict DILI in humans due to the lack of experimental animal models. Although azathioprine (AZA), which is a widely used immunosuppressive drug, is generally well tolerated, a small number of patients prescribed AZA develop severe hepatitis. However, the mechanism underlying this process has not yet been elucidated. In this study, we developed a mouse model of AZA-induced liver injury and investigated the mechanisms responsible for the hepatotoxicity of AZA. Female BALB/c mice were orally administered AZA. After AZA administration, the plasma levels of alanine aminotransferase and aspartate aminotransferase were increased, and liver damage was confirmed through a histological evaluation. In addition, the hepatic glutathione levels and superoxide dismutase activity were significantly decreased. The plasma levels of reactive oxygen species were significantly increased during the early phase of AZA-induced liver injury, and the hepatic mRNA levels of immune- and inflammation-related factors were also significantly changed. In conclusion, oxidative stress and the subsequently activated immune- and inflammation-related factors are involved in AZA-induced liver injury.
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Castro-Santa E, Salnikova O, Ryschich E. The role of β2-integrins and CD44 in intrahepatic leukocyte sequestration. J Surg Res 2013; 184:1070-5. [DOI: 10.1016/j.jss.2013.04.064] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Revised: 04/09/2013] [Accepted: 04/25/2013] [Indexed: 12/29/2022]
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Rossaint J, Zarbock A. Tissue-specific neutrophil recruitment into the lung, liver, and kidney. J Innate Immun 2012; 5:348-57. [PMID: 23257511 DOI: 10.1159/000345943] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2012] [Accepted: 11/20/2012] [Indexed: 12/26/2022] Open
Abstract
The recruitment of immune cells is crucial for the development of inflammatory processes. The classical recruitment cascade of neutrophils into inflamed tissues is well understood and consists of capturing, rolling, slow rolling, arrest, postadhesion strengthening, crawling, and transmigration. While this commonly agreed paradigm might be applicable to most peripheral tissues, recruitment mechanisms may substantially vary in different organs such as the lung, liver, and kidney. These organs are highly specialized tissues with unique cell populations and structural organization, which enables them to fulfill their individual functions. The published research over the last decade has shed some light on organ-specific mechanisms of neutrophil recruitment and helped to generate a deeper understanding of the specific recruitment mechanisms involved in this process. The aim of this review is to highlight current concepts of tissue-specific differences and similarities of neutrophil recruitment into the lung, liver, and kidney.
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Affiliation(s)
- Jan Rossaint
- Max Planck Institute for Molecular Biomedicine, and Department of Anaesthesiology, Intensive Care and Pain Medicine, University Hospital Münster, Münster, Germany
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Wiechert L, Németh J, Pusterla T, Bauer C, De Ponti A, Manthey S, Marhenke S, Vogel A, Klingmüller U, Hess J, Angel P. Hepatocyte-specific S100a8 and S100a9 transgene expression in mice causes Cxcl1 induction and systemic neutrophil enrichment. Cell Commun Signal 2012; 10:40. [PMID: 23241281 PMCID: PMC3533587 DOI: 10.1186/1478-811x-10-40] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2012] [Accepted: 12/07/2012] [Indexed: 02/04/2023] Open
Abstract
Background Calprotectin consists of the Ca2+-binding proteins S100a8 and S100a9 that are induced in epithelial cells in response to tissue damage and infection. Both proteins are also secreted by activated innate immune cells and numerous studies demonstrate their crucial role in pathological conditions of acute and chronic inflammation. Results Here, we established a conditional mouse model with simultaneous S100a8 and S100a9 transgene expression in hepatocytes (TgS100a8a9hep) under the control of doxycycline to unravel the role of epithelial-derived Calprotectin on tissue homeostasis and inflammation. TgS100a8a9hep mice displayed a significant enrichment of neutrophils in peripheral blood and tissues with high blood content. Interestingly, Cxcl1 transcription was significantly induced in the liver of TgS100a8a9hep mice and primary hepatocytes derived thereof as compared to Control mice, accompanied by an increase of Cxcl1 serum levels. However, expression of other chemokines with a known function in neutrophil mobilization from the bone marrow, e.g. Csf3 and Cxcl2, was not altered. Doxycycline treatment of TgS100a8a9hep mice reduced Cxcl1 expression in the liver and resulted in normal numbers of neutrophils. Conclusion In summary, our data demonstrate for the first time that hepatocyte-specific S100a8 and S100a9 expression induces a systemic mobilization of neutrophils by a specific activation of Cxcl1 transcription in the liver.
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Affiliation(s)
- Lars Wiechert
- Junior Group Molecular Mechanisms of Head and Neck Tumors, DKFZ-ZMBH Alliance, German Cancer Research Center (DKFZ), Heidelberg, Germany.
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Dhanda AD, Lee RWL, Collins PL, McCune CA. Molecular targets in the treatment of alcoholic hepatitis. World J Gastroenterol 2012; 18:5504-13. [PMID: 23112542 PMCID: PMC3482636 DOI: 10.3748/wjg.v18.i39.5504] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2012] [Revised: 07/26/2012] [Accepted: 07/29/2012] [Indexed: 02/06/2023] Open
Abstract
Alcohol related costs to health and society are high. One of the most serious complications of alcohol misuse to the individual is the development of alcoholic hepatitis (AH), a clinical syndrome of jaundice and progressive inflammatory liver injury in patients with a history of recent heavy alcohol use. It has a poor outcome and few existing successful therapies. The use of glucocorticoids in patients with severe AH is still controversial and there remains a group of patients with glucocorticoid-resistant disease. However, as our understanding of the pathogenesis of the condition improves there are opportunities to develop new targeted therapies with specific actions to control liver inflammation without having a detrimental effect on the immune system as a whole. In this article we review the molecular mechanisms of AH concentrating on the activation of the innate and adaptive immune response. We consider existing treatments including glucocorticoids, anti-tumor necrosis factor therapy and pentoxifylline and their limitations. Using our knowledge of the disease pathogenesis we discuss possible novel therapeutic approaches. New targets include pro-inflammatory cytokines such as interleukin (IL)-17, chemokines and their receptors (for example IL-8, CXCL9 and CXCR3) and augmentation of anti-inflammatory molecules such as IL-10 and IL-22. And there is also future potential to consider combination therapy to selectively modulate the immune response and gain control of disease.
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Woolbright BL, Jaeschke H. Novel insight into mechanisms of cholestatic liver injury. World J Gastroenterol 2012; 18:4985-93. [PMID: 23049206 PMCID: PMC3460324 DOI: 10.3748/wjg.v18.i36.4985] [Citation(s) in RCA: 143] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/29/2012] [Revised: 04/12/2012] [Accepted: 04/20/2012] [Indexed: 02/06/2023] Open
Abstract
Cholestasis results in a buildup of bile acids in serum and in hepatocytes. Early studies into the mechanisms of cholestatic liver injury strongly implicated bile acid-induced apoptosis as the major cause of hepatocellular injury. Recent work has focused both on the role of bile acids in cell signaling as well as the role of sterile inflammation in the pathophysiology. Advances in modern analytical methodology have allowed for more accurate measuring of bile acid concentrations in serum, liver, and bile to very low levels of detection. Interestingly, toxic bile acid levels are seemingly far lower than previously hypothesized. The initial hypothesis has been based largely upon the exposure of μmol/L concentrations of toxic bile acids and bile salts to primary hepatocytes in cell culture, the possibility that in vivo bile acid concentrations may be far lower than the observed in vitro toxicity has far reaching implications in the mechanism of injury. This review will focus on both how different bile acids and different bile acid concentrations can affect hepatocytes during cholestasis, and additionally provide insight into how these data support recent hypotheses that cholestatic liver injury may not occur through direct bile acid-induced apoptosis, but may involve largely inflammatory cell-mediated liver cell necrosis.
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Innate immune cells in liver inflammation. Mediators Inflamm 2012; 2012:949157. [PMID: 22933833 PMCID: PMC3425885 DOI: 10.1155/2012/949157] [Citation(s) in RCA: 156] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2011] [Accepted: 06/17/2012] [Indexed: 12/20/2022] Open
Abstract
Innate immune system is the first line of defence against invading pathogens that is critical for the overall survival of the host. Human liver is characterised by a dual blood supply, with 80% of blood entering through the portal vein carrying nutrients and bacterial endotoxin from the gastrointestinal tract. The liver is thus constantly exposed to antigenic loads. Therefore, pathogenic microorganism must be efficiently eliminated whilst harmless antigens derived from the gastrointestinal tract need to be tolerized in the liver. In order to achieve this, the liver innate immune system is equipped with multiple cellular components; monocytes, macrophages, granulocytes, natural killer cells, and dendritic cells which coordinate to exert tolerogenic environment at the same time detect, respond, and eliminate invading pathogens, infected or transformed self to mount immunity. This paper will discuss the innate immune cells that take part in human liver inflammation, and their roles in both resolution of inflammation and tissue repair.
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Donepudi AC, Aleksunes LM, Driscoll MV, Seeram NP, Slitt AL. The traditional ayurvedic medicine, Eugenia jambolana (Jamun fruit), decreases liver inflammation, injury and fibrosis during cholestasis. Liver Int 2012; 32:560-73. [PMID: 22212619 PMCID: PMC3299847 DOI: 10.1111/j.1478-3231.2011.02724.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2011] [Accepted: 11/17/2011] [Indexed: 12/13/2022]
Abstract
BACKGROUND Cholestasis is a common disease of the liver. Chronic cholestasis eventually leads to hepatic cirrhosis and fibrosis, and rodent chronic cholestasis models are used to study aspects of fibrosis and cirrhosis. Cholestasis-induced liver injury and fibrosis are associated with increased oxidative stress and inflammation. Few pharmacological therapies exist for treatment of cholestasis or cirrhosis, but it is known that humans with better nutritional intake are less likely to develop certain types of cirrhosis. Eugenia jambolana (Jamun) is a tropical berry fruit rich in antioxidant anthocyanin compounds. AIM As anthocyanins decrease cellular lipid peroxidation and oxidative stress, it was hypothesized that Jamun fruit extract (JFE) administration could protect against cholestatic liver injury and inflammation in mice. METHOD Starting 24 h after sham or bile-duct ligation (BDL) surgery, male C57Bl/6 mice were administered vehicle or JFE (100 mg/kg, po) for 10 days. RESULTS Mice that underwent BDL had elevated serum ALT levels, which were reduced to 60% by JFE treatment. Likewise, BDL caused hepatic inflammation, macrophage infiltration, fibrosis and necrosis, all of which were largely improved by JFE. Interestingly, hepatoprotection was observed in JFE-treated BDL mice, despite suppressed transporter expression and increased hepatic bile acid concentrations. CONCLUSION Jamun fruit phytochemicals decreased hepatic inflammation and oxidative stress, and protected against hepatocellular injury in mice. Jamun warrants further investigation as a potential antioxidant/anti-inflammatory therapy not only to treat cholestasis but also other liver diseases with an inflammatory component.
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Affiliation(s)
- Ajay C. Donepudi
- Department of Biomedical and Pharmaceutical Sciences, University of Rhode Island, Kingston, RI 02881
| | - Lauren M. Aleksunes
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Rutgers University, 170 Frelinghuysen Road, Piscataway, NJ 08854
| | - Maureen V. Driscoll
- Department of Biomedical and Pharmaceutical Sciences, University of Rhode Island, Kingston, RI 02881
| | - Navindra P. Seeram
- Department of Biomedical and Pharmaceutical Sciences, University of Rhode Island, Kingston, RI 02881
| | - Angela L. Slitt
- Department of Biomedical and Pharmaceutical Sciences, University of Rhode Island, Kingston, RI 02881
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Yano A, Higuchi S, Tsuneyama K, Fukami T, Nakajima M, Yokoi T. Involvement of immune-related factors in diclofenac-induced acute liver injury in mice. Toxicology 2012; 293:107-114. [PMID: 22285467 DOI: 10.1016/j.tox.2012.01.008] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2011] [Revised: 12/20/2011] [Accepted: 01/13/2012] [Indexed: 02/07/2023]
Abstract
Drug-induced liver injury (DILI) is a major safety concern in drug development and clinical drug therapy. However, the underlying mechanism of DILI is little known. It is difficult to predict DILI in humans due to the lack of experimental animal models. Diclofenac, a non-steroidal anti-inflammatory drug rarely causes severe liver injury in human, but there is some evidence for immunoallergic idiosyncratic reactions. In this study, the mechanism of diclofenac-induced liver injury in mice was investigated. First, we established the dosing condition for liver injury in normal mice. Plasma ALT and AST levels were significantly increased in diclofenac-administered (80 mg/kg, i.p.) mice in a dose- and time-dependent manner. Among several interleukins (ILs) and chemokines, mRNA expression of helper T (Th) 17 cell-mediated factors, such as retinoid orphan receptor (ROR)-γt, and signal transducers and activators of transcription factor (STAT) 3 in the liver, and the plasma IL-17 level were significantly increased. Neutralization of IL-17 tended to suppress the hepatotoxicity of diclofenac, suggesting that IL-17 was partly involved. Gadolinium chloride (GdCl₃) administration demonstrated that Kupffer cells are not likely to be involved in diclofenac hepatotoxicity. Hepatic expressions of IL-1β mRNA and plasma IL-1β were significantly increased soon after the diclofenac administration. Then, the results of an in vivo neutralization study of IL-1β suggested that IL-1β was involved early in the time of pathogenesis of the diclofenac-induced liver injury. In conclusion, we firstly developed a diclofenac-induced acute liver injury model in normal mice, and the involvement of IL-17 and IL-1β was clarified.
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Affiliation(s)
- Azusa Yano
- Drug Metabolism and Toxicology, Faculty of Pharmaceutical Sciences, Kanazawa University, Kanazawa, Japan
| | - Satonori Higuchi
- Drug Metabolism and Toxicology, Faculty of Pharmaceutical Sciences, Kanazawa University, Kanazawa, Japan
| | - Koichi Tsuneyama
- Department of Diagnostic Pathology, Graduate School of Medicine and Pharmaceutical Science for Research, University of Toyama, Japan
| | - Tatsuki Fukami
- Drug Metabolism and Toxicology, Faculty of Pharmaceutical Sciences, Kanazawa University, Kanazawa, Japan
| | - Miki Nakajima
- Drug Metabolism and Toxicology, Faculty of Pharmaceutical Sciences, Kanazawa University, Kanazawa, Japan
| | - Tsuyoshi Yokoi
- Drug Metabolism and Toxicology, Faculty of Pharmaceutical Sciences, Kanazawa University, Kanazawa, Japan.
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Jaeschke H, Williams CD, Ramachandran A, Bajt ML. Acetaminophen hepatotoxicity and repair: the role of sterile inflammation and innate immunity. Liver Int 2012; 32:8-20. [PMID: 21745276 PMCID: PMC3586825 DOI: 10.1111/j.1478-3231.2011.02501.x] [Citation(s) in RCA: 335] [Impact Index Per Article: 27.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Acetaminophen (APAP) hepatotoxicity because of overdose is the most frequent cause of acute liver failure in the western world. Metabolic activation of APAP and protein adduct formation, mitochondrial dysfunction, oxidant stress, peroxynitrite formation and nuclear DNA fragmentation are critical intracellular events in hepatocytes. However, the early cell necrosis causes the release of a number of mediators such as high-mobility group box 1 protein, DNA fragments, heat shock proteins (HSPs) and others (collectively named damage-associated molecular patterns), which can be recognized by toll-like receptors on macrophages, and leads to their activation with cytokine and chemokine formation. Although pro-inflammatory mediators recruit inflammatory cells (neutrophils, monocytes) into the liver, neither the infiltrating cells nor the activated resident macrophages cause any direct cytotoxicity. In contrast, pro- and anti-inflammatory cytokines and chemokines can directly promote intracellular injury mechanisms by inducing nitric oxide synthase or inhibit cell death mechanisms by the expression of acute-phase proteins (HSPs, heme oxygenase-1) and promote hepatocyte proliferation. In addition, the newly recruited macrophages (M2) and potentially neutrophils are involved in the removal of necrotic cell debris in preparation for tissue repair and resolution of the inflammatory response. Thus, as discussed in detail in this review, the preponderance of experimental evidence suggests that the extensive sterile inflammatory response during APAP hepatotoxicity is predominantly beneficial by limiting the formation and the impact of pro-inflammatory mediators and by promoting tissue repair.
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Affiliation(s)
- Hartmut Jaeschke
- Department of Pharmacology, Toxicology and Therapeutics, University of Kansas Medical Center, Kansas City, KS 66160, USA.
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Williams CD, Jaeschke H. Role of innate and adaptive immunity during drug-induced liver injury. Toxicol Res (Camb) 2012; 1:161. [DOI: 10.1039/c2tx20032e] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023] Open
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Perry BC, Soltys D, Toledo AH, Toledo-Pereyra LH. Tumor Necrosis Factor-α in Liver Ischemia/Reperfusion Injury. J INVEST SURG 2011; 24:178-88. [DOI: 10.3109/08941939.2011.568594] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Williams CD, Antoine DJ, Shaw PJ, Benson C, Farhood A, Williams DP, Kanneganti TD, Park BK, Jaeschke H. Role of the Nalp3 inflammasome in acetaminophen-induced sterile inflammation and liver injury. Toxicol Appl Pharmacol 2011; 252:289-97. [PMID: 21396389 DOI: 10.1016/j.taap.2011.03.001] [Citation(s) in RCA: 104] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2011] [Revised: 02/18/2011] [Accepted: 03/01/2011] [Indexed: 12/20/2022]
Abstract
Acetaminophen (APAP) overdose is the leading cause of acute liver failure in the US and UK. Recent studies implied that APAP-induced injury is partially mediated by interleukin-1β (IL-1β), which can activate and recruit neutrophils, exacerbating injury. Mature IL-1β is formed by caspase-1, dependent on inflammasome activation. The objective of this invetstigation was to evaluate the role of the Nalp3 inflammasome on release of damage associated molecular patterns (DAMPs), hepatic neutrophil accumulation and liver injury (ALT, necrosis) after APAP overdose. Mice deficient for each component of the Nalp3 inflammasome (caspase-1, ASC and Nalp3) were treated with 300mg/kg APAP for 24h; these mice had similar neutrophil recruitment and liver injury as APAP-treated C57Bl/6 wildtype animals. In addition, plasma levels of DAMPs (DNA fragments, keratin-18, hypo- and hyper-acetylated forms of high mobility group box-1 protein) were similarly elevated with no significant difference between wildtype and gene knockout mice. In addition, aspirin treatment, which has been postulated to attenuate cytokine formation and the activation of the Nalp3 inflammasome after APAP, had no effect on release of DAMPs, hepatic neutrophil accumulation or liver injury. Together, these data confirm the release of DAMPs and a sterile inflammatory response after APAP overdose. However, as previously reported minor endogenous formation of IL-1β and the activation of the Nalp3 inflammasome have little impact on APAP hepatotoxicity. It appears that the Nalp3 inflammasome is not a promising therapeutic target to treat APAP overdose.
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Affiliation(s)
- C David Williams
- Department of Pharmacology, Toxicology and Therapeutics, University of Kansas Medical Center, Kansas City, KS 66160, USA
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Jaeschke H. Toxicant-Induced Liver Injury. MOLECULAR PATHOLOGY LIBRARY 2011:641-653. [DOI: 10.1007/978-1-4419-7107-4_42] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/30/2023]
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Abstract
Liver cell death induced by stresses such as ischemia-reperfusion, cholestasis and drug toxicity can trigger a sterile inflammatory response with activation of innate immune cells through release of damage-associated molecular patterns (DAMPs). A similar inflammatory response can be induced by pathogen-associated molecular patterns (PAMPs) such as endotoxin. Both DAMPs and PAMPs activate through toll-like receptors the resident macrophages (Kupffer cells) and recruit activated neutrophils and monocytes into the liver. Central to this inflammatory response is promotion of reactive oxygen species (ROS) formation by these phagocytes. ROS are the principal toxic mediators by which inflammatory cells kill their targets, e.g. bacteria during host defense but also hepatocytes and other liver cells. The mechanism of ROS-induced cell killing during inflammation involves the promotion of mitochondrial dysfunction through an intracellular oxidant stress in hepatocytes leading mainly to oncotic necrosis and less apoptosis. The additional release of cell contents amplifies the inflammatory injury. However, an inflammatory oxidant stress insufficient to directly cause cell damage can induce transcription of stress defence genes including antioxidant genes. This preconditioning effect of ROS enhances the resistance against future inflammatory oxidant stress and promotes the initiation of tissue repair processes. Despite the substantial progress in our understanding of mechanisms of inflammatory liver injury during the last decade, more research is necessary to better understand the role of ROS in acute liver inflammation and to develop clinically applicable therapeutic strategies that selectively target the detrimental effects of oxidant stress without compromising the vital function of ROS in host defense.
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Affiliation(s)
- Hartmut Jaeschke
- Department of Pharmacology, Toxicology and Therapeutics, University of Kansas Medical Center, Kansas City, 66160, USA.
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Kowalewska PM, Patrick AL, Fox-Robichaud AE. Innate immunity of the liver microcirculation. Cell Tissue Res 2010; 343:85-96. [PMID: 21049273 DOI: 10.1007/s00441-010-1058-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2010] [Accepted: 09/10/2010] [Indexed: 12/30/2022]
Abstract
The liver is a complex organ with a unique microcirculation and both synthetic and immune functions. Innate immune responses have been studied in response to single inflammatory mediators and several clinically relevant models of infection and injury. While standard histological techniques have been used in many models, the liver microcirculation is also amenable to in vivo examination using epifluorescent, confocal and transillumination intravital microscopy. These techniques have begun to clarify not only the molecular mechanisms but also the specific cell populations involved in the liver inflammation. In this review, we discuss the cells and mediators involved in hepatic innate immunity in simple and complex models of injury and infection, and present the view that the liver microcirculation utilizes non-classical pathways for leukocyte recruitment.
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Williams CD, Bajt ML, Farhood A, Jaeschke H. Acetaminophen-induced hepatic neutrophil accumulation and inflammatory liver injury in CD18-deficient mice. Liver Int 2010; 30:1280-92. [PMID: 20500806 PMCID: PMC4278356 DOI: 10.1111/j.1478-3231.2010.02284.x] [Citation(s) in RCA: 105] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Acetaminophen (APAP) hepatotoxicity is currently the most frequent cause of acute liver failure in the US and many European countries. Although intracellular signalling mechanisms are critical for hepatocellular injury, a contribution of inflammatory cells, especially neutrophils, has been suggested. However, conflicting results were obtained when using immunological intervention strategies. AIMS The role of neutrophils was investigated using a CD18-deficient mouse model. RESULTS Treatment of C57Bl/6 wild type mice with 300 mg/kg APAP resulted in severe liver cell necrosis at 12 and 24 h. This injury was accompanied by formation of cytokines and chemokines and accumulation of neutrophils in the liver. However, there was no difference in the inflammatory response or liver injury in CD18-deficient mice compared with wild-type animals. In contrast to treatment with endotoxin, no upregulation of CD11b or priming for reactive oxygen was observed on neutrophils isolated from the peripheral blood or the liver after APAP administration. Furthermore, animals treated with endotoxin 3 h after APAP experienced an exaggerated inflammatory response as indicated by substantially higher cytokine and chemokine formation and twice the number of neutrophils in the liver. However, liver injury in the two-hit model was the same as with APAP alone. CONCLUSIONS Our data do not support the hypothesis that neutrophils contribute to APAP hepatotoxicity or that a neutrophil-mediated injury phase could be provoked by a second, pro-inflammatory hit. Thus, APAP-induced liver injury in mice is dominated by intracellular mechanisms of cell death rather than by neutrophilic inflammation.
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Affiliation(s)
- C. David Williams
- Department of Pharmacology, Toxicology & Therapeutics, University of Kansas Medical Center, Kansas City, Kansas, USA
| | - Mary Lynn Bajt
- Department of Pharmacology, Toxicology & Therapeutics, University of Kansas Medical Center, Kansas City, Kansas, USA
| | - Anwar Farhood
- Department of Pathology, Brackenridge Hospital, Austin, Texas, USA
| | - Hartmut Jaeschke
- Department of Pharmacology, Toxicology & Therapeutics, University of Kansas Medical Center, Kansas City, Kansas, USA
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