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Taheri M, Tehrani HA, Daliri F, Alibolandi M, Soleimani M, Shoari A, Arefian E, Ramezani M. Bioengineering strategies to enhance the interleukin-18 bioactivity in the modern toolbox of cancer immunotherapy. Cytokine Growth Factor Rev 2024; 75:65-80. [PMID: 37813764 DOI: 10.1016/j.cytogfr.2023.09.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Revised: 09/26/2023] [Accepted: 09/26/2023] [Indexed: 10/11/2023]
Abstract
Cytokines are the first modern immunotherapeutic agents used for activation immunotherapy. Interleukin-18 (IL-18) has emerged as a potent anticancer immunostimulatory cytokine over the past three decades. IL-18, structurally is a stable protein with very low toxicity at biological doses. IL-18 promotes the process of antigen presentation and also enhances innate and acquired immune responses. It can induce the production of proinflammatory cytokines and increase tumor infiltration of effector immune cells to revert the immunosuppressive milieu of tumors. Furthermore, IL-18 can reduce tumorigenesis, suppress tumor angiogenesis, and induce tumor cell apoptosis. These characteristics present IL-18 as a promising option for cancer immunotherapy. Although several preclinical studies have reported the immunotherapeutic potential of IL-18, clinical trials using it as a monotherapy agent have reported disappointing results. These results may be due to some biological characteristics of IL-18. Several bioengineering approaches have been successfully used to correct its defects as a bioadjuvant. Currently, the challenge with this anticancer immunotherapeutic agent is mainly how to use its capabilities in a rational combinatorial therapy for clinical applications. The present study discussed the strengths and weaknesses of IL-18 as an immunotherapeutic agent, followed by comprehensive review of various promising bioengineering approaches that have been used to overcome its disadvantages. Finally, this study highlights the promising application of IL-18 in modern combinatorial therapies, such as chemotherapy, immune checkpoint blockade therapy, cell-based immunotherapy and cancer vaccines to guide future studies, circumventing the barriers to administration of IL-18 for clinical applications, and bring it to fruition as a potent immunotherapy agent in cancer treatment.
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Affiliation(s)
- Mojtaba Taheri
- Department of Medical Biotechnology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Hossein Abdul Tehrani
- Department of Medical Biotechnology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran.
| | | | - Mona Alibolandi
- Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Pharmaceutical Biotechnology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Masoud Soleimani
- Department of Hematology and Cell Therapy, Faculty of Medical Sciences, Tarbiat Modares University, Iran
| | - Alireza Shoari
- Department of Cancer Biology, Mayo Clinic, Jacksonville, FL, USA
| | - Ehsan Arefian
- Department of Microbiology, School of Biology, College of Science, University of Tehran, Tehran, Iran; Pediatric Cell and Gene Therapy Research Center, Gene, Cell & Tissue Research Institute, Tehran University of Medical Sciences, Tehran, Iran.
| | - Mohammad Ramezani
- Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Pharmaceutical Biotechnology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran.
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2
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Chen G, Hu X, Huang Y, Xiang X, Pan S, Chen R, Xu X. Role of the immune system in liver transplantation and its implications for therapeutic interventions. MedComm (Beijing) 2023; 4:e444. [PMID: 38098611 PMCID: PMC10719430 DOI: 10.1002/mco2.444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Revised: 11/23/2023] [Accepted: 11/24/2023] [Indexed: 12/17/2023] Open
Abstract
Liver transplantation (LT) stands as the gold standard for treating end-stage liver disease and hepatocellular carcinoma, yet postoperative complications continue to impact survival rates. The liver's unique immune system, governed by a microenvironment of diverse immune cells, is disrupted during processes like ischemia-reperfusion injury posttransplantation, leading to immune imbalance, inflammation, and subsequent complications. In the posttransplantation period, immune cells within the liver collaboratively foster a tolerant environment, crucial for immune tolerance and liver regeneration. While clinical trials exploring cell therapy for LT complications exist, a comprehensive summary is lacking. This review provides an insight into the intricacies of the liver's immune microenvironment, with a specific focus on macrophages and T cells as primary immune players. Delving into the immunological dynamics at different stages of LT, we explore the disruptions after LT and subsequent immune responses. Focusing on immune cell targeting for treating liver transplant complications, we provide a comprehensive summary of ongoing clinical trials in this domain, especially cell therapies. Furthermore, we offer innovative treatment strategies that leverage the opportunities and prospects identified in the therapeutic landscape. This review seeks to advance our understanding of LT immunology and steer the development of precise therapies for postoperative complications.
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Affiliation(s)
- Guanrong Chen
- The Fourth School of Clinical MedicineZhejiang Chinese Medical UniversityHangzhouChina
| | - Xin Hu
- Zhejiang University School of MedicineHangzhouChina
- Key Laboratory of Integrated Oncology and Intelligent Medicine of Zhejiang ProvinceHangzhouChina
| | - Yingchen Huang
- The Fourth School of Clinical MedicineZhejiang Chinese Medical UniversityHangzhouChina
| | - Xiaonan Xiang
- Zhejiang University School of MedicineHangzhouChina
- Key Laboratory of Integrated Oncology and Intelligent Medicine of Zhejiang ProvinceHangzhouChina
| | - Sheng Pan
- Zhejiang University School of MedicineHangzhouChina
- Key Laboratory of Integrated Oncology and Intelligent Medicine of Zhejiang ProvinceHangzhouChina
| | - Ronggao Chen
- Department of Hepatobiliary and Pancreatic SurgeryThe First Affiliated HospitalZhejiang University School of MedicineHangzhouChina
| | - Xiao Xu
- Zhejiang University School of MedicineHangzhouChina
- Key Laboratory of Integrated Oncology and Intelligent Medicine of Zhejiang ProvinceHangzhouChina
- Zhejiang Chinese Medical UniversityHangzhouChina
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3
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Ihim SA, Abubakar SD, Zian Z, Sasaki T, Saffarioun M, Maleknia S, Azizi G. Interleukin-18 cytokine in immunity, inflammation, and autoimmunity: Biological role in induction, regulation, and treatment. Front Immunol 2022; 13:919973. [PMID: 36032110 PMCID: PMC9410767 DOI: 10.3389/fimmu.2022.919973] [Citation(s) in RCA: 67] [Impact Index Per Article: 33.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Accepted: 07/25/2022] [Indexed: 12/13/2022] Open
Abstract
Interleukin-18 (IL-18) is a potent pro-inflammatory cytokine involved in host defense against infections and regulates the innate and acquired immune response. IL-18 is produced by both hematopoietic and non-hematopoietic cells, including monocytes, macrophages, keratinocytes and mesenchymal cell. IL-18 could potentially induce inflammatory and cytotoxic immune cell activities leading to autoimmunity. Its elevated levels have been reported in the blood of patients with some immune-related diseases, including rheumatoid arthritis, systemic lupus erythematosus, type I diabetes mellitus, atopic dermatitis, psoriasis, and inflammatory bowel disease. In the present review, we aimed to summarize the biological properties of IL-18 and its pathological role in different autoimmune diseases. We also reported some monoclonal antibodies and drugs targeting IL-18. Most of these monoclonal antibodies and drugs have only produced partial effectiveness or complete ineffectiveness in vitro, in vivo and human studies. The ineffectiveness of these drugs targeting IL-18 may be largely due to the loophole caused by the involvement of other cytokines and proteins in the signaling pathway of many inflammatory diseases besides the involvement of IL-18. Combination drug therapies, that focus on IL-18 inhibition, in addition to other cytokines, are highly recommended to be considered as an important area of research that needs to be explored.
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Affiliation(s)
- Stella Amarachi Ihim
- Department of Molecular and Cellular Pharmacology, University of Shizuoka, Shizuoka, Japan
- Department of Pharmacology and Toxicology, University of Nigeria, Nsukka, Nigeria
- Department of Science Laboratory Technology, University of Nigeria, Nsukka, Nigeria
| | - Sharafudeen Dahiru Abubakar
- Division of Molecular Pathology, Research Institute for Biomedical Sciences, Tokyo University of Science, Tokyo, Japan
- Department of Medical Laboratory Science, College of Medical Science, Ahmadu Bello University, Zaria, Nigeria
| | - Zeineb Zian
- Biomedical Genomics and Oncogenetics Research Laboratory, Faculty of Sciences and Techniques of Tangier, Abdelmalek Essaadi University, Tetouan, Morocco
| | - Takanori Sasaki
- Division of Rheumatology, Immunology and Allergy, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, United States
- Division of Rheumatology, Department of Internal Medicine, Keio University School of Medicine, Tokyo, Japan
| | - Mohammad Saffarioun
- Biopharmaceutical Research Center, AryoGen Pharmed Inc., Alborz University of Medical Sciences, Karaj, Iran
| | - Shayan Maleknia
- Biopharmaceutical Research Center, AryoGen Pharmed Inc., Alborz University of Medical Sciences, Karaj, Iran
| | - Gholamreza Azizi
- Non-Communicable Diseases Research Center, Alborz University of Medical Sciences, Karaj, Iran
- *Correspondence: Gholamreza Azizi,
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Huang M, Cai H, Han B, Xia Y, Kong X, Gu J. Natural Killer Cells in Hepatic Ischemia-Reperfusion Injury. Front Immunol 2022; 13:870038. [PMID: 35418990 PMCID: PMC8996070 DOI: 10.3389/fimmu.2022.870038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2022] [Accepted: 03/07/2022] [Indexed: 11/13/2022] Open
Abstract
Ischemia-reperfusion injury can be divided into two phases, including insufficient supply of oxygen and nutrients in the first stage and then organ injury caused by immune inflammation after blood flow recovery. Hepatic ischemia-reperfusion is an important cause of liver injury post-surgery, consisting of partial hepatectomy and liver transplantation, and a central driver of graft dysfunction, which greatly leads to complications and mortality after liver transplantation. Natural killer (NK) cells are the lymphocyte population mainly involved in innate immune response in the human liver. In addition to their well-known role in anti-virus and anti-tumor defense, NK cells are also considered to regulate the pathogenesis of liver ischemia-reperfusion injury under the support of more and more evidence recently. The infiltration of NK cells into the liver exacerbates the hepatic ischemia-reperfusion injury, which could be significantly alleviated after depletion of NK cells. Interestingly, NK cells may contribute to both liver graft rejection and tolerance according to their origins. In this article, we discussed the development of liver NK cells, their role in ischemia-reperfusion injury, and strategies of inhibiting NK cell activation in order to provide potential possibilities for translation application in future clinical practice.
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Affiliation(s)
- Miao Huang
- Department of Transplantation, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Central Laboratory, Department of Liver Diseases, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Hao Cai
- Department of Transplantation, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Bing Han
- Department of Transplantation, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yuhan Xia
- Department of Transplantation, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiaoni Kong
- Central Laboratory, Department of Liver Diseases, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Jinyang Gu
- Department of Transplantation, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
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Oral Administration of Piperine as Curative and Prophylaxis Reduces Parasitaemia in Plasmodium berghei ANKA-Infected Mice. J Trop Med 2022; 2022:5721449. [PMID: 35360190 PMCID: PMC8964209 DOI: 10.1155/2022/5721449] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 01/28/2022] [Accepted: 02/04/2022] [Indexed: 01/27/2023] Open
Abstract
Malaria remains a public health problem and a leading cause of death worldwide. Consequently, the discovery of novel agents, including substances from medicinal plants, is urgently needed. Piper nigrum has long been used by the community in the treatment of the symptoms of malaria. In a previous study, Piper nigrum was demonstrated to exhibit promising antiplasmodial activity against Plasmodium falciparum 3D7 and INDO strains. The aim of this study was to further investigate the antimalarial activity (curative and prophylactic) of piperine (a major isolated constituent of Piper nigrum) in Plasmodium berghei ANKA-infected mice. Piperine 10, 20, and 40 mg/kg body weight (bw), artesunate 5 mg/kg bw, and DMSO were administered orally for four days to different groups of Swiss Webster mice. Then, mice were monitored for parasitaemia, body weight, rectal temperature, survival rate, and clinical parameters. Piperine 40 mg/kg bw in curative and prophylactic tests had the maximum parasitaemia chemosuppression of 79.21% and 58.8% (p < 0.05), respectively, with a significant effect on the survival rate compared with control animals. In the curative test, piperine 40 mg/kg bw reduced the mean clinical score compared with the control group. Additionally, piperine showed an ability to protect organs (lungs, liver, spleen, and kidneys) from some damage in a dose-dependent manner. This study can be used as a basis for further discovery of novel chemotherapeutic or chemoprophylactic compounds.
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Somm E, Jornayvaz FR. Interleukin-18 in metabolism: From mice physiology to human diseases. Front Endocrinol (Lausanne) 2022; 13:971745. [PMID: 36313762 PMCID: PMC9596921 DOI: 10.3389/fendo.2022.971745] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 09/23/2022] [Indexed: 11/13/2022] Open
Abstract
Interleukin-18 (IL-18) is a classical member of the IL-1 superfamily of cytokines. As IL-1β, IL-18 precursor is processed by inflammasome/caspase-1 into a mature and biologically active form. IL-18 binds to its specific receptor composed of two chains (IL-18Rα and IL-18Rβ) to trigger a similar intracellular signaling pathway as IL-1, ultimately leading to activation of NF-κB and inflammatory processes. Independently of this IL-1-like signaling, IL-18 also specifically induces IFN-γ production, driving the Th1 immune response. In circulation, IL-18 binds to the IL-18 binding protein (IL-18BP) with high affinity, letting only a small fraction of free IL-18 able to trigger receptor-mediated signaling. In contrast to other IL-1 family members, IL-18 is produced constitutively by different cell types, suggesting implications in normal physiology. If the roles of IL-18 in inflammatory processes and infectious diseases are well described, recent experimental studies in mice have highlighted the action of IL-18 signaling in the control of energy homeostasis, pancreatic islet immunity and liver integrity during nutritional stress. At the same time, clinical observations implicate IL-18 in various metabolic diseases including obesity, type 1 and 2 diabetes and nonalcoholic fatty liver disease (NAFLD)/nonalcoholic steatohepatitis (NASH). In the present review, we summarize and discuss both the physiological actions of IL-18 in metabolism and its potential roles in pathophysiological mechanisms leading to the most common human metabolic disorders, such as obesity, diabetes and NAFLD/NASH.
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Affiliation(s)
- Emmanuel Somm
- Service of Endocrinology, Diabetes, Nutrition and Therapeutic Patient Education, Department of Internal Medicine, Geneva University Hospitals, Geneva, Switzerland
- Department of Cell Physiology and Metabolism, University of Geneva, Geneva, Switzerland
- Diabetes Center, Faculty of Medicine, University of Geneva, Geneva, Switzerland
- *Correspondence: Emmanuel Somm, ; François R. Jornayvaz,
| | - François R. Jornayvaz
- Service of Endocrinology, Diabetes, Nutrition and Therapeutic Patient Education, Department of Internal Medicine, Geneva University Hospitals, Geneva, Switzerland
- Department of Cell Physiology and Metabolism, University of Geneva, Geneva, Switzerland
- Diabetes Center, Faculty of Medicine, University of Geneva, Geneva, Switzerland
- *Correspondence: Emmanuel Somm, ; François R. Jornayvaz,
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Behura A, Das M, Kumar A, Naik L, Mishra A, Manna D, Patel S, Mishra A, Singh R, Dhiman R. ESAT-6 impedes IL-18 mediated phagosome lysosome fusion via microRNA-30a upon Calcimycin treatment in mycobacteria infected macrophages. Int Immunopharmacol 2021; 101:108319. [PMID: 34740079 DOI: 10.1016/j.intimp.2021.108319] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 10/05/2021] [Accepted: 10/25/2021] [Indexed: 01/18/2023]
Abstract
The weaponry possessed by Mycobacterium tuberculosis (M. tb) in the form of immunodominant antigens hijack the host immune system to give a survival advantage to this intracellular fiend, but the mechanism of this control is not entirely known. Since we have previously reported the mechanism of autophagy inhibition by early secreted antigenic target 6 kDa (ESAT-6) through microRNA (miR)-30a-3p in Calcimycin treated differentiated THP-1 (dTHP-1) cells, the present study was undertaken to deduce the effect of miR-30a on the immunomodulatory profile of ESAT-6 treated cells and the mechanism involved thereof, if any. Initially, the effect of recombinant ESAT-6 (rESAT-6) on the immunomodulatory profile in Calcimycin-treated phorbol 12-myristate 13-acetate (PMA) dTHP-1 cells was checked. Later, transfection studies using miR-30a-3p inhibitor or -5p mimic highlighted the contrary roles of different arms of the same miRNA in regulating IL-18 response by ESAT-6 in dTHP-1 cells after Calcimycin treatment. By using either IL-18 neutralizing antibody or inhibitors of phosphoinositide 3-kinase (PI3K)/NF-κB/phagosome-lysosome fusion in the miRNA-30a transfected background, IL-18 mediated signaling and intracellular killing of mycobacteria was reversed in the presence of ESAT-6. Overall, the results of this study conclusively prove the contrary roles of miR-30a-3p and miR-30a-5p in regulating IL-18 signaling by ESAT-6 in dTHP-1 cells upon Calcimycin treatment that affected phagosome-lysosome fusion and intracellular survival of mycobacteria.
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Affiliation(s)
- Assirbad Behura
- Laboratory of Mycobacterial Immunology, Department of Life Science, National Institute of Technology, Rourkela 769008, Odisha, India
| | - Mousumi Das
- Laboratory of Mycobacterial Immunology, Department of Life Science, National Institute of Technology, Rourkela 769008, Odisha, India
| | - Ashish Kumar
- Laboratory of Mycobacterial Immunology, Department of Life Science, National Institute of Technology, Rourkela 769008, Odisha, India
| | - Lincoln Naik
- Laboratory of Mycobacterial Immunology, Department of Life Science, National Institute of Technology, Rourkela 769008, Odisha, India
| | - Abtar Mishra
- Laboratory of Mycobacterial Immunology, Department of Life Science, National Institute of Technology, Rourkela 769008, Odisha, India
| | - Debraj Manna
- Laboratory of Mycobacterial Immunology, Department of Life Science, National Institute of Technology, Rourkela 769008, Odisha, India
| | - Salina Patel
- Laboratory of Mycobacterial Immunology, Department of Life Science, National Institute of Technology, Rourkela 769008, Odisha, India
| | - Amit Mishra
- Cellular and Molecular Neurobiology Unit, Indian Institute of Technology Jodhpur, Rajasthan 342011, India
| | - Ramandeep Singh
- Tuberculosis Research Laboratory, Vaccine and Infectious Disease Research Centre, Translational Health Science and Technology Institute, NCR Biotech Science Cluster, 3rd Milestone, Faridabad-Gurugram Expressway, PO Box # 4, Faridabad 121001, Haryana, India
| | - Rohan Dhiman
- Laboratory of Mycobacterial Immunology, Department of Life Science, National Institute of Technology, Rourkela 769008, Odisha, India.
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Different Features of Interleukin-37 and Interleukin-18 as Disase Activity Markers of Adult-Onset Still's Disease. J Clin Med 2021; 10:jcm10050910. [PMID: 33652679 PMCID: PMC7956170 DOI: 10.3390/jcm10050910] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 02/14/2021] [Accepted: 02/18/2021] [Indexed: 12/11/2022] Open
Abstract
The aim of this study was to evaluate the usefulness of serum interleukin (IL)-37 and IL-18 as disease activity markers of adult-onset Still’s disease (AOSD) and to compare their related clinical features. Forty-five patients with a set of high and subsequent low disease activity status of AOSD were enrolled. Modified Pouchot (mPouchot) score and serologic disease activity markers including levels of IL-37 and IL-18 were compared between high and low disease activity status. The relationships between disease activity parameters and differences in levels of cytokines according to each disease manifestation were evaluated in high disease activity status. mPouchot score and all disease activity markers including IL-37 and IL-18 significantly declined after treatment. Though both cytokines positively correlated with mPouchot score, the two did not correlate with each other in high disease activity status. IL-18 positively correlated with ferritin, AST, and LDH while IL-37 correlated better with CRP. The expression level of IL-37 was related to leukocytosis while IL-18 was related to pleuritis, pneumonitis, abnormal LFT, and hyperferritinemia. In addition, patients in the IL-18 dominant group presented with higher LDH levels and required a higher mean corticosteroid dose. In conclusion, IL-37 and IL-18 are disease activity markers reflecting different aspects of AOSD that can complement each other.
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El Costa H, Gouilly J, Abravanel F, Bahraoui E, Peron JM, Kamar N, Jabrane-Ferrat N, Izopet J. Effector memory CD8 T cell response elicits Hepatitis E Virus genotype 3 pathogenesis in the elderly. PLoS Pathog 2021; 17:e1009367. [PMID: 33617602 PMCID: PMC7932504 DOI: 10.1371/journal.ppat.1009367] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 03/04/2021] [Accepted: 02/09/2021] [Indexed: 12/17/2022] Open
Abstract
Genotype 3 Hepatitis E virus (HEV-3) is an emerging threat for aging population. More than one third of older infected patients develops clinical symptoms with severe liver damage, while others remain asymptomatic. The origin of this discrepancy is still elusive although HEV-3 pathogenesis appears to be immune-mediated. Therefore, we investigated the role of CD8 T cells in the outcome of the infection in immunocompetent elderly subjects. We enrolled twenty two HEV-3-infected patients displaying similar viral determinants and fifteen healthy donors. Among the infected group, sixteen patients experienced clinical symptoms related to liver disease while six remained asymptomatic. Here we report that symptomatic infection is characterized by an expansion of highly activated effector memory CD8 T (EM) cells, regardless of antigen specificity. This robust activation is associated with key features of early T cell exhaustion including a loss in polyfunctional type-1 cytokine production and partial commitment to type-2 cells. In addition, we show that bystander activation of EM cells seems to be dependent on the inflammatory cytokines IL-15 and IL-18, and is supported by an upregulation of the activating receptor NKG2D and an exuberant expression of T-Bet and T-Bet-regulated genes including granzyme B and CXCR3. We also show that the inflammatory chemokines CXCL9-10 are increased in symptomatic patients thereby fostering the recruitment of highly cytotoxic EM cells into the liver in a CXCR3-dependent manner. Finally, we find that the EM-biased immune response returns to homeostasis following viral clearance and disease resolution, further linking the EM cells response to viral burden. Conversely, asymptomatic patients are endowed with low-to-moderate EM cell response. In summary, our findings define immune correlates that contribute to HEV-3 pathogenesis and emphasize the central role of EM cells in governing the outcome of the infection. The outcome of Genotype 3 Hepatitis E virus (HEV-3) infection differs among the elderly. Some patients develop severe forms of Hepatitis E while others remain asymptomatic. Nonetheless, parameters which can lead to severe versus silent infection are largely unknown. Therefore, we investigated immunological features of CD8 T cells in infected patients (aged ≥55) with similar viral determinants but distinct clinical outcomes. We show that drastic phenotypic changes were specifically observed within the effector memory (EM) compartment. Compared to asymptomatic patients, symptomatic ones display a strong activation of both HEV-3-specific and -nonspecific EM CD8 T cells associated with qualitative and quantitative alterations in cytokine production. In addition, EM cells are endowed with high cytotoxic capacity and have the ability to rapidly migrate to the liver. Finally, we report that the inflammatory response to HEV-3 infection shape EM cell activation and function in symptomatic elderly patients. In summary, our results present the first report demonstrating that the nature and the magnitude of EM CD8 T cell response play an important role in the outcome of HEV-3 infection in the elderly.
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Affiliation(s)
- Hicham El Costa
- Infinity—Université Toulouse, CNRS, Inserm, Toulouse, France
- Laboratoire de Virologie, Centre National de référence HEV, Institut Fédératif de Biologie, CHU Toulouse, Toulouse, France
- * E-mail:
| | - Jordi Gouilly
- Infinity—Université Toulouse, CNRS, Inserm, Toulouse, France
| | - Florence Abravanel
- Infinity—Université Toulouse, CNRS, Inserm, Toulouse, France
- Laboratoire de Virologie, Centre National de référence HEV, Institut Fédératif de Biologie, CHU Toulouse, Toulouse, France
| | | | - Jean-Marie Peron
- Département de Gastroentérologie, CHU Toulouse, Toulouse, France
| | - Nassim Kamar
- Infinity—Université Toulouse, CNRS, Inserm, Toulouse, France
| | | | - Jacques Izopet
- Infinity—Université Toulouse, CNRS, Inserm, Toulouse, France
- Laboratoire de Virologie, Centre National de référence HEV, Institut Fédératif de Biologie, CHU Toulouse, Toulouse, France
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10
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Radujkovic A, Boch T, Nolte F, Nowak D, Kunz C, Gieffers A, Müller-Tidow C, Dreger P, Hofmann WK, Luft T. Clinical Response to the CD95-Ligand Inhibitor Asunercept Is Defined by a Pro-Inflammatory Serum Cytokine Profile. Cancers (Basel) 2020; 12:cancers12123683. [PMID: 33302451 PMCID: PMC7764464 DOI: 10.3390/cancers12123683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 11/27/2020] [Accepted: 12/07/2020] [Indexed: 11/23/2022] Open
Abstract
Simple Summary Asunercept showed promising clinical efficacy in anemic, transfusion-dependent patients with low and intermediate risk myelodysplastic syndrome. In this retrospective post hoc analysis, serum levels of biomarkers were measured in study patients focusing on cytokines associated with erythropoiesis, inflammation, apoptosis, bone marrow fibrosis, and inflammasome activity. Baseline serum biomarkers were correlated with treatment response in order to propose a hypothetical responder serum profile. Response to asunercept was associated with improved overall survival. Higher baseline values of interleukin-18 (IL-18), S100 calcium-binding protein A9 (S100A9) and soluble p53 were predictive of non-response to asunercept. Non-responding patients showed a distinct, pro-inflammatory serum cytokine profile which was persistent throughout the first half of the treatment phase and appeared unaffected by asunercept. Our post hoc analysis suggests that serum cytokine profiling based on IL-18, S100A9 and soluble p53 may represent an approach to identify and select low-risk myelodysplastic syndrome patients most likely to benefit from asunercept treatment. Abstract Asunercept (APG101) is a well-tolerated CD95-ligand inhibitor that showed promising efficacy in a prospective, single-arm phase I study in anemic, transfusion-dependent patients with low and intermediate risk myelodysplastic syndrome (MDS). In this retrospective post hoc analysis, serum levels of biomarkers were measured in study patients focusing on cytokines associated with erythropoiesis, inflammation, apoptosis, bone marrow fibrosis, and inflammasome activity. Baseline serum biomarkers were correlated with treatment response, in order to propose a hypothetical responder serum profile. After an updated median follow-up of 54 months (range 7–65), response to asunercept was associated with improved overall survival (at 3-years: 67% [95%CI 36–97] versus 13% [95%CI 0–36] in responders versus non-responders, respectively). Higher baseline values of interleukin-18 (IL-18), S100 calcium-binding protein A9 (S100A9) and soluble p53 were predictive of non-response to asunercept (area under the receiver operating characteristic curve 0.79–0.82). Furthermore, non-responding patients showed a distinct, pro-inflammatory serum cytokine profile which was persistent throughout the first half of the treatment phase and appeared unaffected by asunercept. Although prospective validation is required, our post hoc analysis suggests that serum cytokine profiling based on IL-18, S100A9 and soluble p53 may represent an approach to identify and select low-risk MDS patients most likely to benefit from asunercept treatment.
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Affiliation(s)
- Aleksandar Radujkovic
- Department of Internal Medicine V, University Hospital Heidelberg, 69120 Heidelberg, Germany; (C.M.-T.); (P.D.); (T.L.)
- Correspondence:
| | - Tobias Boch
- Department of Hematology and Oncology, University Hospital Mannheim, Heidelberg University, 68167 Mannheim, Germany; (T.B.); (F.N.); (D.N.); (W.-K.H.)
| | - Florian Nolte
- Department of Hematology and Oncology, University Hospital Mannheim, Heidelberg University, 68167 Mannheim, Germany; (T.B.); (F.N.); (D.N.); (W.-K.H.)
| | - Daniel Nowak
- Department of Hematology and Oncology, University Hospital Mannheim, Heidelberg University, 68167 Mannheim, Germany; (T.B.); (F.N.); (D.N.); (W.-K.H.)
| | - Claudia Kunz
- Apogenix AG, 69120 Heidelberg, Germany; (C.K.); (A.G.)
| | | | - Carsten Müller-Tidow
- Department of Internal Medicine V, University Hospital Heidelberg, 69120 Heidelberg, Germany; (C.M.-T.); (P.D.); (T.L.)
| | - Peter Dreger
- Department of Internal Medicine V, University Hospital Heidelberg, 69120 Heidelberg, Germany; (C.M.-T.); (P.D.); (T.L.)
| | - Wolf-Karsten Hofmann
- Department of Hematology and Oncology, University Hospital Mannheim, Heidelberg University, 68167 Mannheim, Germany; (T.B.); (F.N.); (D.N.); (W.-K.H.)
| | - Thomas Luft
- Department of Internal Medicine V, University Hospital Heidelberg, 69120 Heidelberg, Germany; (C.M.-T.); (P.D.); (T.L.)
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11
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Ben Selma W, Alibi S, Smach MA, Saad A, Boukadida J. IL-18 variant increases risk of enhanced HBV DNA replication in chronic hepatitis. Immunol Lett 2020; 228:70-75. [DOI: 10.1016/j.imlet.2020.10.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 09/24/2020] [Accepted: 10/01/2020] [Indexed: 12/13/2022]
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12
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Modifying bacterial flagellin to evade Nod-like Receptor CARD 4 recognition enhances protective immunity against Salmonella. Nat Microbiol 2020; 5:1588-1597. [PMID: 33106673 DOI: 10.1038/s41564-020-00801-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Accepted: 09/17/2020] [Indexed: 02/06/2023]
Abstract
Pattern recognition receptors (PRRs) expressed in antigen-presenting cells are thought to shape pathogen-specific immunity by inducing secretion of costimulatory cytokines during T-cell activation, yet data to support this notion in vivo are scarce. Here, we show that the cytosolic PRR Nod-like Receptor CARD 4 (NLRC4) suppresses, rather than facilitates, effector and memory CD4+ T-cell responses against Salmonella in mice. NLRC4 negatively regulates immunological memory by preventing delayed activation of the cytosolic PRR NLR pyrin domain 3 (NLRP3) that would otherwise amplify the production of cytokines important for the generation of Th1 immunity such as intereukin-18. Consistent with a role for NLRC4 in memory immunity, primary challenge with Salmonella expressing flagellin modified to largely evade NLRC4 recognition notably increases protection against lethal rechallenge. This finding suggests flagellin modification to reduce NLRC4 activation enhances protective immunity, which could have important implications for vaccine development against flagellated microbial pathogens.
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13
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Castillo-Dela Cruz P, Wanek AG, Kumar P, An X, Elsegeiny W, Horne W, Fitch A, Burr AHP, Gopalakrishna KP, Chen K, Methé BA, Canna SW, Hand TW, Kolls JK. Intestinal IL-17R Signaling Constrains IL-18-Driven Liver Inflammation by the Regulation of Microbiome-Derived Products. Cell Rep 2020; 29:2270-2283.e7. [PMID: 31747600 PMCID: PMC6886715 DOI: 10.1016/j.celrep.2019.10.042] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 09/04/2019] [Accepted: 10/10/2019] [Indexed: 12/18/2022] Open
Abstract
Interleukin (IL)-17 signaling to the intestinal epithelium regulates the intestinal microbiome. Given the reported links between intestinal dysbiosis, bacterial translocation, and liver disease, we hypothesize that intestinal IL-17R signaling plays a critical role in mitigating hepatic inflammation. To test this, we study intestinal epithelium-specific IL-17RA-deficient mice in an immune-driven hepatitis model. At the naive state, these mice exhibit microbiome dysbiosis and increased translocation of bacterial products (CpG DNA), which drives liver IL-18 production. Upon disease induction, absence of enteric IL-17RA signaling exacerbates hepatitis and hepatocyte cell death. IL-18 is necessary for disease exacerbation and is associated with increased activated hepatic lymphocytes based on Ifng and Fasl expression. Thus, intestinal IL-17R regulates translocation of TLR9 ligands and constrains susceptibility to hepatitis. These data connect enteric Th17 signaling and the microbiome in hepatitis, with broader implications on the effects of impaired intestinal immunity and subsequent release of microbial products observed in other extra-intestinal pathologies. Castillo-dela Cruz et al. describe a unique protective role of intestinal IL-17RA in hepatitis. Disruption of intestinal IL-17RA signaling results in microbiome dysbiosis and translocation of bacterial products, specifically unmethylated CpG DNA, to the liver. This promotes IL-18 production and subsequent lymphocyte activation and cell death to exacerbate liver inflammation.
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Affiliation(s)
- Patricia Castillo-Dela Cruz
- Richard King Mellon Foundation Institute for Pediatric Research, Department of Pediatrics, UPMC Children's Hospital of Pittsburgh, Pittsburgh, PA 15224, USA; Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA
| | - Alanna G Wanek
- Departments of Medicine and Pediatrics, Center for Translational Research in Infection and Inflammation, Tulane University School of Medicine, New Orleans, LA 70112, USA
| | - Pawan Kumar
- Richard King Mellon Foundation Institute for Pediatric Research, Department of Pediatrics, UPMC Children's Hospital of Pittsburgh, Pittsburgh, PA 15224, USA
| | - Xiaojing An
- Department of Medicine, Division of Pulmonary, Allergy, and Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA
| | - Waleed Elsegeiny
- Richard King Mellon Foundation Institute for Pediatric Research, Department of Pediatrics, UPMC Children's Hospital of Pittsburgh, Pittsburgh, PA 15224, USA
| | - William Horne
- Richard King Mellon Foundation Institute for Pediatric Research, Department of Pediatrics, UPMC Children's Hospital of Pittsburgh, Pittsburgh, PA 15224, USA
| | - Adam Fitch
- Department of Medicine, Division of Pulmonary, Allergy, and Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA; Center for Medicine and the Microbiome, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA
| | - Ansen H P Burr
- Richard King Mellon Foundation Institute for Pediatric Research, Department of Pediatrics, UPMC Children's Hospital of Pittsburgh, Pittsburgh, PA 15224, USA; Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA
| | - Kathyayini P Gopalakrishna
- Richard King Mellon Foundation Institute for Pediatric Research, Department of Pediatrics, UPMC Children's Hospital of Pittsburgh, Pittsburgh, PA 15224, USA; Department of Human Genetics, University of Pittsburgh Graduate School of Public Health, Pittsburgh, PA 15213, USA
| | - Kong Chen
- Department of Medicine, Division of Pulmonary, Allergy, and Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA
| | - Barbara A Methé
- Department of Medicine, Division of Pulmonary, Allergy, and Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA; Center for Medicine and the Microbiome, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA
| | - Scott W Canna
- Richard King Mellon Foundation Institute for Pediatric Research, Department of Pediatrics, UPMC Children's Hospital of Pittsburgh, Pittsburgh, PA 15224, USA; Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA
| | - Timothy W Hand
- Richard King Mellon Foundation Institute for Pediatric Research, Department of Pediatrics, UPMC Children's Hospital of Pittsburgh, Pittsburgh, PA 15224, USA; Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA
| | - Jay K Kolls
- Richard King Mellon Foundation Institute for Pediatric Research, Department of Pediatrics, UPMC Children's Hospital of Pittsburgh, Pittsburgh, PA 15224, USA; Departments of Medicine and Pediatrics, Center for Translational Research in Infection and Inflammation, Tulane University School of Medicine, New Orleans, LA 70112, USA.
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14
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Belkaya S, Michailidis E, Korol CB, Kabbani M, Cobat A, Bastard P, Lee YS, Hernandez N, Drutman S, de Jong YP, Vivier E, Bruneau J, Béziat V, Boisson B, Lorenzo-Diaz L, Boucherit S, Sebagh M, Jacquemin E, Emile JF, Abel L, Rice CM, Jouanguy E, Casanova JL. Inherited IL-18BP deficiency in human fulminant viral hepatitis. J Exp Med 2019; 216:1777-1790. [PMID: 31213488 PMCID: PMC6683989 DOI: 10.1084/jem.20190669] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 05/14/2019] [Accepted: 05/15/2019] [Indexed: 12/21/2022] Open
Abstract
Fulminant viral hepatitis (FVH) is a devastating and unexplained condition that strikes otherwise healthy individuals during primary infection with common liver-tropic viruses. We report a child who died of FVH upon infection with hepatitis A virus (HAV) at age 11 yr and who was homozygous for a private 40-nucleotide deletion in IL18BP, which encodes the IL-18 binding protein (IL-18BP). This mutation is loss-of-function, unlike the variants found in a homozygous state in public databases. We show that human IL-18 and IL-18BP are both secreted mostly by hepatocytes and macrophages in the liver. Moreover, in the absence of IL-18BP, excessive NK cell activation by IL-18 results in uncontrolled killing of human hepatocytes in vitro. Inherited human IL-18BP deficiency thus underlies fulminant HAV hepatitis by unleashing IL-18. These findings provide proof-of-principle that FVH can be caused by single-gene inborn errors that selectively disrupt liver-specific immunity. They also show that human IL-18 is toxic to the liver and that IL-18BP is its antidote.
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Affiliation(s)
- Serkan Belkaya
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY
| | | | - Cecilia B Korol
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Necker Hospital for Sick Children, Paris, France.,Paris Descartes University, Imagine Institute, Paris, France
| | - Mohammad Kabbani
- Laboratory of Virology and Infectious Disease, The Rockefeller University, New York, NY
| | - Aurélie Cobat
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Necker Hospital for Sick Children, Paris, France.,Paris Descartes University, Imagine Institute, Paris, France
| | - Paul Bastard
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY
| | - Yoon Seung Lee
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY
| | - Nicholas Hernandez
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY
| | - Scott Drutman
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY
| | - Ype P de Jong
- Laboratory of Virology and Infectious Disease, The Rockefeller University, New York, NY.,Division of Gastroenterology and Hepatology, Weill Cornell Medical College, New York, NY
| | - Eric Vivier
- Aix Marseille Université, INSERM, Centre National de la Recherche Scientifique, Centre d'Immunologie de Marseille-Luminy, Marseille, France.,Service d'Immunologie, Marseille Immunopole, Hôpital de la Timone, Assistance Publique-Hôpitaux de Marseille, Marseille, France.,Innate Pharma Research Laboratories, Innate Pharma, Marseille, France
| | - Julie Bruneau
- Paris Descartes University, Imagine Institute, Paris, France.,Department of Pathology, Assistance Publique-Hôpitaux de Paris, Necker Hospital for Sick Children, Paris, France
| | - Vivien Béziat
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY.,Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Necker Hospital for Sick Children, Paris, France.,Paris Descartes University, Imagine Institute, Paris, France
| | - Bertrand Boisson
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY.,Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Necker Hospital for Sick Children, Paris, France.,Paris Descartes University, Imagine Institute, Paris, France
| | - Lazaro Lorenzo-Diaz
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Necker Hospital for Sick Children, Paris, France.,Paris Descartes University, Imagine Institute, Paris, France
| | - Soraya Boucherit
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Necker Hospital for Sick Children, Paris, France.,Paris Descartes University, Imagine Institute, Paris, France
| | - Mylène Sebagh
- Department of Pathology, Hepato-biliary Center, Assistance Publique-Hôpitaux de Paris, Paul Brousse Hospital, Villejuif, France
| | - Emmanuel Jacquemin
- Pediatric Hepatology and Liver Transplantation Unit, National Reference Centre for Rare Pediatric Liver Diseases, Assistance Publique-Hôpitaux de Paris, Bicêtre University Hospital, University of Paris Sud-Saclay, Le Kremlin Bicêtre, France.,INSERM U1174, University of Paris Sud-Saclay, Hepatinov, Orsay, France
| | - Jean-François Emile
- Department of Pathology, Assistance Publique-Hôpitaux de Paris, Ambroise Paré Hospital, Boulogne-Billancourt, France
| | - Laurent Abel
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY.,Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Necker Hospital for Sick Children, Paris, France.,Paris Descartes University, Imagine Institute, Paris, France
| | - Charles M Rice
- Laboratory of Virology and Infectious Disease, The Rockefeller University, New York, NY
| | - Emmanuelle Jouanguy
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY.,Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Necker Hospital for Sick Children, Paris, France.,Paris Descartes University, Imagine Institute, Paris, France
| | - Jean-Laurent Casanova
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY .,Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Necker Hospital for Sick Children, Paris, France.,Paris Descartes University, Imagine Institute, Paris, France.,Pediatric Immunology-Hematology Unit, Necker Hospital for Sick Children, Paris, France.,Howard Hughes Medical Institute, New York, NY
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15
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Ohtani N, Kawada N. Role of the Gut-Liver Axis in Liver Inflammation, Fibrosis, and Cancer: A Special Focus on the Gut Microbiota Relationship. Hepatol Commun 2019; 3:456-470. [PMID: 30976737 PMCID: PMC6442695 DOI: 10.1002/hep4.1331] [Citation(s) in RCA: 111] [Impact Index Per Article: 22.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Accepted: 02/11/2019] [Indexed: 12/20/2022] Open
Abstract
The gut and the liver are anatomically and physiologically connected, and this “gut–liver axis” exerts various influences on liver pathology. The gut microbiota consists of various microorganisms that normally coexist in the human gut and have a role of maintaining the homeostasis of the host. However, once homeostasis is disturbed, metabolites and components derived from the gut microbiota translocate to the liver and induce pathologic effects in the liver. In this review, we introduce and discuss the mechanisms of liver inflammation, fibrosis, and cancer that are influenced by gut microbial components and metabolites; we include recent advances in molecular‐based therapeutics and novel mechanistic findings associated with the gut–liver axis and gut microbiota.
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Affiliation(s)
- Naoko Ohtani
- Department of Pathophysiology Osaka City University, Graduate School of Medicine Osaka Japan
| | - Norifumi Kawada
- Department of Hepatology Osaka City University, Graduate School of Medicine Osaka Japan
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16
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Interleukin-18 in Health and Disease. Int J Mol Sci 2019; 20:ijms20030649. [PMID: 30717382 PMCID: PMC6387150 DOI: 10.3390/ijms20030649] [Citation(s) in RCA: 284] [Impact Index Per Article: 56.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 01/28/2019] [Accepted: 01/29/2019] [Indexed: 12/12/2022] Open
Abstract
Interleukin (IL)-18 was originally discovered as a factor that enhanced IFN-γ production from anti-CD3-stimulated Th1 cells, especially in the presence of IL-12. Upon stimulation with Ag plus IL-12, naïve T cells develop into IL-18 receptor (IL-18R) expressing Th1 cells, which increase IFN-γ production in response to IL-18 stimulation. Therefore, IL-12 is a commitment factor that induces the development of Th1 cells. In contrast, IL-18 is a proinflammatory cytokine that facilitates type 1 responses. However, IL-18 without IL-12 but with IL-2, stimulates NK cells, CD4+ NKT cells, and established Th1 cells, to produce IL-3, IL-9, and IL-13. Furthermore, together with IL-3, IL-18 stimulates mast cells and basophils to produce IL-4, IL-13, and chemical mediators such as histamine. Therefore, IL-18 is a cytokine that stimulates various cell types and has pleiotropic functions. IL-18 is a member of the IL-1 family of cytokines. IL-18 demonstrates a unique function by binding to a specific receptor expressed on various types of cells. In this review article, we will focus on the unique features of IL-18 in health and disease in experimental animals and humans.
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17
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Swidnicka-Siergiejko A, Wereszczynska-Siemiatkowska U, Siemiatkowski A, Wasielica-Berger J, Janica J, Mroczko B, Dabrowski A. The imbalance of peripheral interleukin-18 and transforming growth factor-β1 levels in patients with cirrhosis and esophageal varices. Cytokine 2018; 113:440-445. [PMID: 30392846 DOI: 10.1016/j.cyto.2018.10.024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 10/09/2018] [Accepted: 10/29/2018] [Indexed: 02/07/2023]
Abstract
INTRODUCTION The presence of esophageal varices in liver cirrhosis indicates clinically significant portal hypertension (PH), that results from structural and dynamic changes in the liver and systemic circulation including the activation of several fibrotic and inflammatory pathways. We assessed if interleukin-18 (IL-18) and transforming growth factor-β1 (TGF-β1) serum levels can be used as PH markers and reflect its severity. MATERIAL AND METHODS IL-18 and TGF-β1 peripheral blood levels were analyzed in 83 cirrhotic patients with esophageal varices compared to healthy individuals, in relation to MELD and Child-Pugh scores, laboratory and Doppler ultrasound parameters, and non-selective beta-blocker therapy (NSBB). RESULTS IL-18 concentration was significantly higher in cirrhotic patients, while TGF-β1 concentration was lower than in controls. MELD score correlated positively with IL-18 levels and negatively with TGF-β1 levels. IL-18 levels correlated positively with bilirubin, INR, ALT and AST levels, and negatively with albumin levels and erythrocyte count. TGF-β1 levels correlated positively with platelet count, leukocyte, and erythrocyte count, and negatively with bilirubin levels and prothrombin time. Moreover, significant correlations were found: between IL and 18 levels and portal, mesenteric superior, and splenic vein velocity, and between TGF-β1 levels and splenic vein diameter and spleen size. In a subgroup of patients, IL-18 levels significantly decreased after NSBB. CONCLUSION The observed imbalance of peripheral IL-18 and TGF-β1 levels indicates clinically significant PH associated with the presence of esophageal varices in cirrhosis. The correlation of IL-18 levels with liver failure indicators and decrease with NSBB suggest an important role of IL-18 in disease progression and its potential use as noninvasive test for PH assessment.
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Affiliation(s)
| | | | - Andrzej Siemiatkowski
- Department of Anaesthesiology and Intensive Care, Medical University of Bialystok, Poland
| | | | - Jacek Janica
- Department of Radiology, Medical University of Bialystok, Poland
| | - Barbara Mroczko
- Department of Neurodegeneration Diagnostic, Medical University of Bialystok, Poland
| | - Andrzej Dabrowski
- Department of Gastroenterology and Internal Medicine, Medical University of Bialystok, Poland
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18
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Mosaad YM, Metwally SS, Farag RE, Lotfy ZF, AbdelTwab HE. Association between Toll-Like Receptor 3 (TLR3) rs3775290, TLR7 rs179008, TLR9 rs352140 and Chronic HCV. Immunol Invest 2018; 48:321-332. [DOI: 10.1080/08820139.2018.1527851] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Youssef M. Mosaad
- Clinical Immunology Unit, Clinical Pathology Department, Mansoura Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Shereen S. Metwally
- Clinical Immunology Unit, Clinical Pathology Department, Mansoura Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Raghda E. Farag
- Tropical Medicine, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Zakeria F. Lotfy
- Clinical Immunology Unit, Clinical Pathology Department, Mansoura Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Hosam E. AbdelTwab
- Clinical Immunology Unit, Clinical Pathology Department, Mansoura Faculty of Medicine, Mansoura University, Mansoura, Egypt
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19
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Abstract
Initially described as an interferon (IFN)γ‐inducing factor, interleukin (IL)‐18 is indeed involved in Th1 and NK cell activation, but also in Th2, IL‐17‐producing γδ T cells and macrophage activation. IL‐18, a member of the IL‐1 family, is similar to IL‐1β for being processed by caspase 1 to an 18 kDa‐biologically active mature form. IL‐18 binds to its specific receptor (IL‐18Rα, also known as IL‐1R7) forming a low affinity ligand chain. This is followed by recruitment of the IL‐18Rβ chain. IL‐18 then uses the same signaling pathway as IL‐1 to activate NF‐kB and induce inflammatory mediators such as adhesion molecules, chemokines and Fas ligand. IL‐18 also binds to the circulating high affinity IL‐18 binding protein (BP), such as only unbound free IL‐18 is active. IL‐18Rα may also bind IL‐37, another member of the IL‐1 family, but in association with the negative signaling chain termed IL‐1R8, which transduces an anti‐inflammatory signal. IL‐18BP also binds IL‐37 and this acts as a sink for the anti‐inflammatory properties of IL‐37. There is now ample evidence for a role of IL‐18 in various infectious, metabolic or inflammatory diseases such as influenza virus infection, atheroma, myocardial infarction, chronic obstructive pulmonary disease, or Crohn's disease. However, IL‐18 plays a very specific role in the pathogenesis of hemophagocytic syndromes (HS) also termed Macrophage Activation Syndrome. In children affected by NLRC4 gain‐of‐function mutations, IL‐18 circulates in the range of tens of nanograms/mL. HS is treated with the IL‐1 Receptor antagonist (anakinra) but also specifically with IL‐18BP. Systemic juvenile idiopathic arthritis or adult‐onset Still's disease are also characterized by high serum IL‐18 concentrations and are treated by IL‐18BP.
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Affiliation(s)
- Gilles Kaplanski
- Assistance Publique-Hôpitaux de Marseille, Centre Hospitalier Universitaire Conception, Service de Médecine Interne et Immunologie Clinique, Aix-Marseille Université, Marseille, France.,Vascular Research Center Marseille, Faculté de Pharmacie, Aix-Marseille Université, INSERM UMR_S1076, Marseille, France
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20
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Nakanishi K. Unique Action of Interleukin-18 on T Cells and Other Immune Cells. Front Immunol 2018; 9:763. [PMID: 29731751 PMCID: PMC5920033 DOI: 10.3389/fimmu.2018.00763] [Citation(s) in RCA: 144] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Accepted: 03/27/2018] [Indexed: 12/26/2022] Open
Abstract
Interleukin (IL)-18 was originally discovered as a factor that enhances interferon (IFN)-γ production by anti-CD3-stimulated Th1 cells, particularly in association with IL-12. IL-12 is a cytokine that induces development of Th1 cells. IL-18 cannot induce Th1 cell development, but has the capacity to activate established Th1 cells to produce IFN-γ in the presence of IL-12. Thus, IL-18 is regarded as a proinflammatory cytokine that facilitates type 1 responses. However, in the absence of IL-12 but presence of IL-2, IL-18 stimulates natural killer cells, NKT cells, and even established Th1 cells to produce IL-3, IL-9, and IL-13. Thus, IL-18 also facilitates type 2 responses. This unique function of IL-18 contributes to infection-associated allergic diseases. Together with IL-3, IL-18 stimulates mast cells and basophils to produce IL-4, IL-13, and chemical mediators such as histamine. Thus, IL-18 also induces innate-type allergic inflammation. IL-18 belongs to the IL-1 family of cytokines, which share similar molecular structures, receptors structures, and signal transduction pathways. Nevertheless, IL-18 shows a unique function by binding to a specific receptor expressed on distinct types of cells. In this review article, I will focus on the unique features of IL-18 in lymphocytes, basophils, and mast cells, particularly in comparison with IL-33.
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Affiliation(s)
- Kenji Nakanishi
- Department of Immunology, Hyogo College of Medicine, Hyogo, Japan
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21
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Bachmann M, Pfeilschifter J, Mühl H. Epigenetic regulation by CpG methylation splits strong from retarded IFNγ-induced IL-18BP in epithelial versus monocytic cells. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2018; 1861:191-199. [DOI: 10.1016/j.bbagrm.2018.01.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 01/19/2018] [Accepted: 01/26/2018] [Indexed: 01/01/2023]
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22
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Hepatic Immune Microenvironment in Alcoholic and Nonalcoholic Liver Disease. BIOMED RESEARCH INTERNATIONAL 2017; 2017:6862439. [PMID: 28852648 PMCID: PMC5567444 DOI: 10.1155/2017/6862439] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Accepted: 07/06/2017] [Indexed: 01/18/2023]
Abstract
Many types of innate (natural killer cells, natural killer T cells, and Kupffer cells/macrophages) and adaptive (T cells and B cells) immune cells are enriched within the liver and function in liver physiology and pathology. Liver pathology is generally induced by two types of immunologic insults: failure to eliminate antigens derived from the gastrointestinal tract which are important for host defense and an impaired tissue protective tolerance mechanism that helps reduce the negative outcomes of immunopathology. Accumulating evidence from the last several decades suggests that hepatic immune cells play an important role in the pathogenesis of alcoholic and nonalcoholic liver injury and inflammation in humans and mice. Here, we focus on the roles of innate and adaptive immune cells in the development and maintenance of alcoholic liver disease and nonalcoholic fatty liver disease/nonalcoholic steatohepatitis. Additionally, the pathogenesis of liver disease and new therapeutic targets for preventing and treating alcoholic liver disease and nonalcoholic fatty liver disease/nonalcoholic steatohepatitis are discussed.
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23
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Morimoto A, Oh Y, Nakamura S, Shioda Y, Hayase T, Imamura T, Kudo K, Imashuku S. Inflammatory serum cytokines and chemokines increase associated with the disease extent in pediatric Langerhans cell histiocytosis. Cytokine 2017; 97:73-79. [PMID: 28582647 DOI: 10.1016/j.cyto.2017.05.026] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Revised: 05/23/2017] [Accepted: 05/27/2017] [Indexed: 12/15/2022]
Abstract
OBJECTIVE Langerhans cell histiocytosis (LCH) is characterized by immature dendritic cell proliferation, infiltration of LCH lesions by various inflammatory cells, and a lesional cytokine storm. It is classified into three groups on the basis of disease extent, namely, multisystem with risk-organ involvement (MS+), multisystem without risk-organ involvement (MS-), and single-system (SS) disease. We comprehensively analyzed whether serum levels of cytokines/chemokines reflect the disease extent. METHODS Serum samples from 52 children with LCH (eight, 25, and 19 with MS+, MS-, and SS, respectively) and 34 control children were analyzed quantitatively for 48 humoral factors. DNA samples extracted from biopsied LCH lesions from 12 patients were tested for BRAF V600E status. RESULTS The LCH patients had significantly higher serum levels of IL-1Ra, IL-3, IL-6, IL-8, IL-9, IL-10, IL12, IL-13, IL-15, IL-17, IL-18, TNF-α, G-CSF, M-CSF, MIF, HGF, VEGF, CCL2, CCL3, CCL7, CXCL1, and CXCL9 than the controls by univariate analysis. Of these IL-9, IL-15 and MIF were significant by multivariate analysis; but not differed between MS and SS diseases. MS disease associated with significantly higher IL-2R, IL-3, IL-8, IL-18, M-CSF, HGF, CCL2, CXCL1, and CXCL9 levels than SS disease by univariate analysis. Of these, CCL2 and M-CSF were significant by multivariate analysis. IL-18 levels were significantly higher in MS+ disease than MS- disease. The LCH patients with BRAF V600E mutation had higher serum levels of CCL7. CONCLUSION Numerous inflammatory cytokines and chemokines play a role in LCH. Of those, more specific ones reflect the disease extent (MS vs. SS and MS+ vs. MS-) or the BRAF V600E mutation status. It is thought that the most responsible cytokines and chemokines involved in the poor outcome may become future candidate therapeutic targets in LCH.
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Affiliation(s)
- Akira Morimoto
- Department of Pediatrics, Jichi Medical University, School of Medicine, Shimotsuke, Japan.
| | - Yukiko Oh
- Department of Pediatrics, Jichi Medical University, School of Medicine, Shimotsuke, Japan
| | - Sachie Nakamura
- Department of Pediatrics, Jichi Medical University, School of Medicine, Shimotsuke, Japan
| | - Yoko Shioda
- Children's Cancer Center, National Center for Child Health and Development, Tokyo, Japan
| | - Tomomi Hayase
- Department of Pediatrics, Jichi Medical University, School of Medicine, Shimotsuke, Japan
| | - Toshihiko Imamura
- Department of Pediatrics, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Kazuko Kudo
- Department of Pediatrics, Fujita Health University, Toyoake, Japan
| | - Shinsaku Imashuku
- Division of Laboratory Medicine, Uji-Tokushukai Medical Center, Uji, Japan
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Lytle KA, Wong CP, Jump DB. Docosahexaenoic acid blocks progression of western diet-induced nonalcoholic steatohepatitis in obese Ldlr-/- mice. PLoS One 2017; 12:e0173376. [PMID: 28422962 PMCID: PMC5396882 DOI: 10.1371/journal.pone.0173376] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Accepted: 02/20/2017] [Indexed: 12/11/2022] Open
Abstract
Background Nonalcoholic fatty liver disease (NAFLD) is a major public health concern in western societies. Nonalcoholic steatohepatitis (NASH), the progressive form of NAFLD, is characterized by hepatic steatosis, inflammation, oxidative stress and fibrosis. NASH is a risk factor for cirrhosis and hepatocellular carcinoma. NASH is predicted to be the leading cause of liver transplants by 2020. Despite this growing public health concern, there remain no Food and Drug Administration (FDA) approved NASH treatments. Using Ldlr-/- mice as a preclinical model of western diet (WD)-induced NASH, we previously established that dietary supplementation with docosahexaenoic acid (DHA, 22:6,ω3) attenuated WD-induced NASH in a prevention study. Herein, we evaluated the capacity of DHA supplementation of the WD and a low fat diet to fully reverse NASH in mice with pre-existing disease. Methods Ldlr-/- mice fed the WD for 22 wks developed metabolic syndrome (MetS) and a severe NASH phenotype, including obesity, dyslipidemia, hyperglycemia, hepatic steatosis, inflammation, fibrosis and low hepatic polyunsaturated fatty acid (PUFA) content. These mice were randomized to 5 groups: a baseline group (WDB, sacrificed at 22 wks) and 4 treatments: 1) WD + olive oil (WDO); 2) WD + DHA (WDD); 3) returned to chow + olive oil (WDChO); or 4) returned to chow + DHA (WDChD). The four treatment groups were maintained on their respective diets for 8 wks. An additional group was maintained on standard laboratory chow (Reference Diet, RD) for the 30-wk duration of the study. Results When compared to the WDB group, the WDO group displayed increased hepatic expression of genes linked to inflammation (Opn, Il1rn, Gdf15), hepatic fibrosis (collagen staining, Col1A1, Thbs2, Lox) reflecting disease progression. Mice in the WDD group, in contrast, had increased hepatic C20-22 ω3 PUFA and no evidence of NASH progression. MetS and NASH markers in the WDChO or WDChD groups were significantly attenuated and marginally different from the RD group, reflecting disease remission. Conclusion While these studies establish that DHA supplementation of the WD blocks WD-induced NASH progression, DHA alone does not promote full remission of diet-induced MetS or NASH.
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Affiliation(s)
- Kelli A. Lytle
- Nutrition Program, School of Biological and Population Health Sciences, Oregon State University, Corvallis, Oregon, United States of America
- Linus Pauling Institute, Oregon State University, Corvallis, Oregon, United States of America
| | - Carmen P. Wong
- Nutrition Program, School of Biological and Population Health Sciences, Oregon State University, Corvallis, Oregon, United States of America
- Linus Pauling Institute, Oregon State University, Corvallis, Oregon, United States of America
| | - Donald B. Jump
- Nutrition Program, School of Biological and Population Health Sciences, Oregon State University, Corvallis, Oregon, United States of America
- Linus Pauling Institute, Oregon State University, Corvallis, Oregon, United States of America
- * E-mail:
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Veenhuis RT, Astemborski J, Chattergoon MA, Greenwood P, Jarosinski M, Moore RD, Mehta SH, Cox AL. Systemic Elevation of Proinflammatory Interleukin 18 in HIV/HCV Coinfection versus HIV or HCV Monoinfection. Clin Infect Dis 2017; 64:589-596. [PMID: 27927859 PMCID: PMC5850551 DOI: 10.1093/cid/ciw771] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2016] [Revised: 11/01/2016] [Accepted: 11/14/2016] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND HIV/HCV coinfection and elevated interleukin (IL)-18 levels are both associated with enhanced progression of hepatic inflammation and increased risk of diabetes, kidney disease, and cardiovascular disease. IL-18 is a proinflammatory cytokine made upon activation of the inflammasome, an innate sensing system. We assessed whether increased IL-18 could explain the increased incidence and progression of inflammatory conditions seen with HIV/HCV coinfection. METHODS Serum from 559 subjects with HIV monoinfection, HCV monoinfection, HIV/HCV coinfection, or people who inject drugs with neither infection was tested for IL-18 by ELISA and for 16 other analytes by electrochemiluminescence immunoassay. IL-18 levels were measured in 14 additional chronically HCV infected subjects who developed incident HIV infection to determine if IL-18 increases with coinfection. RESULTS IL-18 was significantly elevated in coinfected individuals versus both monoinfections (p<0.0001) independent of age, sex, and race. IL-18 levels were significantly higher in HIV monoinfection than in HCV monoinfection. High IL-18 levels were correlated with detectable HIV viremia and inversely with CD4 count (p<0.0001), consistent with HIV activation of the inflammasome resulting in CD4 T cell depletion. Incident HIV infection of chronically HCV infected subjects resulted in increased IL-18 (p<0.001), while HIV suppression was associated with normal IL-18 levels. Four additional analytes (IP-10, IL-12/23p40, IFNy, IL-15) were found to be elevated in HIV/HCV coinfection when compared to both monoinfections. CONCLUSIONS HIV/HCV coinfection results in significantly elevated serum IL-18. The elevated levels of this proinflammatory cytokine may explain the increased incidence and progression of inflammatory illnesses seen in coinfected individuals.
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Affiliation(s)
- Rebecca T Veenhuis
- Division of Infectious Diseases, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Jacquie Astemborski
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Michael A Chattergoon
- Division of Infectious Diseases, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Paige Greenwood
- Division of Infectious Diseases, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Marissa Jarosinski
- Division of Infectious Diseases, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Richard D Moore
- Division of Infectious Diseases, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Shruti H Mehta
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Andrea L Cox
- Division of Infectious Diseases, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
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Inhibition of In Vivo Growth of Plasmodium berghei by Launaea taraxacifolia and Amaranthus viridis in Mice. Malar Res Treat 2016; 2016:9248024. [PMID: 28050307 PMCID: PMC5165229 DOI: 10.1155/2016/9248024] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2016] [Accepted: 09/28/2016] [Indexed: 11/18/2022] Open
Abstract
Launaea taraxacifolia and Amaranthus viridis used by people of Western Africa in the treatment of malaria and related symptoms were assessed for their antiplasmodial value against the chloroquine sensitive strain of Plasmodium berghei. Crude extracts (200 mg/kg) and chloroquine (5 mg/kg) were administered to different groups of Swiss mice. The percentage of parasitemia, survival time, and haematological parameters were determined. Both extracts significantly (p < 0.05) inhibited parasitemia and improved survival time in infected mice. The crude extracts prevented loss of some haematological parameters. A. viridis had a distinct effect on the packed cell volume. The extract was able to protect the liver from some of the damage. This study however showed that the methanolic extracts of A. viridis and L. taraxacifolia possess antiplasmodial activity. The results of this study can be used as a basis for further phytochemical investigations in the search for new and locally affordable antimalarial agents.
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Sadowsky D, Zamora R, Barclay D, Yin J, Fontes P, Vodovotz Y. Machine Perfusion of Porcine Livers with Oxygen-Carrying Solution Results in Reprogramming of Dynamic Inflammation Networks. Front Pharmacol 2016; 7:413. [PMID: 27867357 PMCID: PMC5095594 DOI: 10.3389/fphar.2016.00413] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2016] [Accepted: 10/18/2016] [Indexed: 01/28/2023] Open
Abstract
Background:Ex vivo machine perfusion (MP) can better preserve organs for transplantation. We have recently reported on the first application of an MP protocol in which liver allografts were fully oxygenated, under dual pressures and subnormothermic conditions, with a new hemoglobin-based oxygen carrier (HBOC) solution specifically developed for ex vivo utilization. In those studies, MP improved organ function post-operatively and reduced inflammation in porcine livers. Herein, we sought to refine our knowledge regarding the impact of MP by defining dynamic networks of inflammation in both tissue and perfusate. Methods: Porcine liver allografts were preserved either with MP (n = 6) or with cold static preservation (CSP; n = 6), then transplanted orthotopically after 9 h of preservation. Fourteen inflammatory mediators were measured in both tissue and perfusate during liver preservation at multiple time points, and analyzed using Dynamic Bayesian Network (DyBN) inference to define feedback interactions, as well as Dynamic Network Analysis (DyNA) to define the time-dependent development of inflammation networks. Results: Network analyses of tissue and perfusate suggested an NLRP3 inflammasome-regulated response in both treatment groups, driven by the pro-inflammatory cytokine interleukin (IL)-18 and the anti-inflammatory mediator IL-1 receptor antagonist (IL-1RA). Both DyBN and DyNA suggested a reduced role of IL-18 and increased role of IL-1RA with MP, along with increased liver damage with CSP. DyNA also suggested divergent progression of responses over the 9 h preservation time, with CSP leading to a stable pattern of IL-18-induced liver damage and MP leading to a resolution of the pro-inflammatory response. These results were consistent with prior clinical, biochemical, and histological findings after liver transplantation. Conclusion: Our results suggest that analysis of dynamic inflammation networks in the setting of liver preservation may identify novel diagnostic and therapeutic modalities.
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Affiliation(s)
- David Sadowsky
- Department of Surgery, University of Pittsburgh, Pittsburgh PA, USA
| | - Ruben Zamora
- Department of Surgery, University of Pittsburgh, PittsburghPA, USA; McGowan Institute for Regenerative Medicine, University of Pittsburgh, PittsburghPA, USA
| | - Derek Barclay
- Department of Surgery, University of Pittsburgh, Pittsburgh PA, USA
| | - Jinling Yin
- Department of Surgery, University of Pittsburgh, Pittsburgh PA, USA
| | - Paulo Fontes
- Department of Surgery, University of Pittsburgh, PittsburghPA, USA; McGowan Institute for Regenerative Medicine, University of Pittsburgh, PittsburghPA, USA; Department of Surgery, Thomas E. Starzl Transplantation Institute, PittsburghPA, USA
| | - Yoram Vodovotz
- Department of Surgery, University of Pittsburgh, PittsburghPA, USA; McGowan Institute for Regenerative Medicine, University of Pittsburgh, PittsburghPA, USA
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28
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Jirillo E, Caccavo D, Magrone T, Piccigallo E, Amati L, Lembo A, Kalis C, Gumenscheimer M. Review: The role of the liver in the response to LPS: experimental and clinical findings. ACTA ACUST UNITED AC 2016. [DOI: 10.1177/09680519020080050501] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The liver plays an important physiological role in lipopolysaccharide (LPS) detoxification and, in particular, hepatocytes are involved in the clearance of endotoxin of intestinal derivation. In experimental shock models, tumor necrosis factor (TNF)-α induces hepatocyte apoptosis and lethal effects are due to secreted TNF-α and not to cell-associated TNF-α. An exaggerated production of TNF-α has been reported in murine viral infections, in which mice become sensitized to low amounts of LPS and both interferon (IFN)-γ and IFN-α/β are involved in the macrophage-induced release of TNF-α. The prominent role of LPS and TNF-α in liver injury is also supported by studies of ethanol-induced hepatic damage. In humans, evidence of LPS-induced hepatic injury has been reported in cirrhosis, autoimmune hepatitis, and primary biliary cirrhosis and a decreased phagocytic activity of the reticulo-endothelial system has been found in these diseases. The origin of endotoxemia in hepatitis C virus (HCV) infected patients seems to be multifactorial and LPS may be of exogenous or endogenous derivation. In endotoxemic HCV-positive patients responsive to a combined treatment with IFN-α/ribavirin (RIB), endotoxemia was no longer detected at the end of the therapeutic regimen. By contrast, 48% of the non-responders to this treatment were still endotoxemic and their monocytes displayed higher intracellular TNF-α and interleukin (IL)-1β levels than responders. Moreover, in responders, an equilibrium between IFN-γ and IL-10 serum levels was attained. In the non-responders, serum levels of IL-10 did not increase following treatment. This may imply that an imbalance between T helper (Th)1 and Th2 derived cytokines could be envisaged in the non-responders.
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Affiliation(s)
- E. Jirillo
- Department of Clinical Medicine, Immunology and Infectious Diseases, University of Bari, Bari, Italy, , IRCCS 'Saverio de Bellis', Institute for Digestive Diseases, Castellana Grotte, Bari, Italy
| | - D. Caccavo
- Department of Clinical Medicine, Immunology and Infectious Diseases, University of Bari, Bari, Italy
| | - T. Magrone
- IRCCS 'Saverio de Bellis', Institute for Digestive Diseases, Castellana Grotte, Bari, Italy
| | - E. Piccigallo
- IRCCS 'Saverio de Bellis', Institute for Digestive Diseases, Castellana Grotte, Bari, Italy
| | - L. Amati
- IRCCS 'Saverio de Bellis', Institute for Digestive Diseases, Castellana Grotte, Bari, Italy
| | - A. Lembo
- Department of Clinical Medicine, Immunology and Infectious Diseases, University of Bari, Bari, Italy, Max Planck Institut für Immunbiologie, Freiburg, Germany
| | - C. Kalis
- Max Planck Institut für Immunbiologie, Freiburg, Germany
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Pourcet B, Gage MC, León TE, Waddington KE, Pello OM, Steffensen KR, Castrillo A, Valledor AF, Pineda-Torra I. The nuclear receptor LXR modulates interleukin-18 levels in macrophages through multiple mechanisms. Sci Rep 2016; 6:25481. [PMID: 27149934 PMCID: PMC4858669 DOI: 10.1038/srep25481] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Accepted: 04/19/2016] [Indexed: 12/30/2022] Open
Abstract
IL-18 is a member of the IL-1 family involved in innate immunity and inflammation. Deregulated levels of IL-18 are involved in the pathogenesis of multiple disorders including inflammatory and metabolic diseases, yet relatively little is known regarding its regulation. Liver X receptors or LXRs are key modulators of macrophage cholesterol homeostasis and immune responses. Here we show that LXR ligands negatively regulate LPS-induced mRNA and protein expression of IL-18 in bone marrow-derived macrophages. Consistent with this being an LXR-mediated process, inhibition is abolished in the presence of a specific LXR antagonist and in LXR-deficient macrophages. Additionally, IL-18 processing of its precursor inactive form to its bioactive state is inhibited by LXR through negative regulation of both pro-caspase 1 expression and activation. Finally, LXR ligands further modulate IL-18 levels by inducing the expression of IL-18BP, a potent endogenous inhibitor of IL-18. This regulation occurs via the transcription factor IRF8, thus identifying IL-18BP as a novel LXR and IRF8 target gene. In conclusion, LXR activation inhibits IL-18 production through regulation of its transcription and maturation into an active pro-inflammatory cytokine. This novel regulation of IL-18 by LXR could be applied to modulate the severity of IL-18 driven metabolic and inflammatory disorders.
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Affiliation(s)
- Benoit Pourcet
- Centre for Clinical Pharmacology, Division of Medicine, University College of London, 5 University Street, London, WC1 E6JF, United Kingdom
| | - Matthew C Gage
- Centre for Clinical Pharmacology, Division of Medicine, University College of London, 5 University Street, London, WC1 E6JF, United Kingdom
| | - Theresa E León
- Centre for Clinical Pharmacology, Division of Medicine, University College of London, 5 University Street, London, WC1 E6JF, United Kingdom
| | - Kirsty E Waddington
- Centre for Clinical Pharmacology, Division of Medicine, University College of London, 5 University Street, London, WC1 E6JF, United Kingdom
| | - Oscar M Pello
- Centre for Clinical Pharmacology, Division of Medicine, University College of London, 5 University Street, London, WC1 E6JF, United Kingdom
| | - Knut R Steffensen
- Division of Clinical Chemistry, Department of Laboratory Medicine, Karolinska Institut, Huddinge, Sweden
| | - Antonio Castrillo
- Instituto de Investigaciones Biomedicas "Alberto Sols" Consejo Superior de Investigaciones Científicas (CSIC) de Madrid, Unidad de Biomedicina (Unidad Asociada al CSIC), Instituto Universitario de Investigaciones Biomedicas y Sanitarias (IUIBS) de la Universidad de Las Palmas de Gran Canaria, Las Palmas, Spain
| | - Annabel F Valledor
- School of Biology, University of Barcelona, Diagonal 643, Planta 3, 08028 Barcelona, Spain
| | - Inés Pineda-Torra
- Centre for Clinical Pharmacology, Division of Medicine, University College of London, 5 University Street, London, WC1 E6JF, United Kingdom
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Samarani S, Allam O, Sagala P, Aldabah Z, Jenabian MA, Mehraj V, Tremblay C, Routy JP, Amre D, Ahmad A. Imbalanced production of IL-18 and its antagonist in human diseases, and its implications for HIV-1 infection. Cytokine 2016; 82:38-51. [PMID: 26898120 DOI: 10.1016/j.cyto.2016.01.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Revised: 01/12/2016] [Accepted: 01/15/2016] [Indexed: 12/16/2022]
Abstract
IL-18 is a pleiotropic and multifunctional cytokine that belongs to the IL-1 family. It is produced as a biologically inactive precursor, which is cleaved into its active mature form mainly by caspase-1. The caspase becomes active from its inactive precursor (procaspase-1) upon assembly of an inflammasome. Because of IL-18's potential pro-inflammatory and tissue destructive effects, its biological activities are tightly controlled in the body by its naturally occurring antagonist called IL-18BP. The antagonist is produced in the body both constitutively and in response to an increased production of IL-18 as a negative feedback mechanism. Under physiological conditions, most of IL-18 in the circulation is bound with IL-18BP and is inactive. However, an imbalance in the production of IL-18 and its antagonist (an increase in the production of IL-18 with a decrease, no increase or an insufficient increase in the production of IL-18BP) has been described in many chronic inflammatory diseases in humans. The imbalance results in an increase in the concentrations of free IL-18 (unbound with its antagonist) resulting in increased biological activities of the cytokine that contribute towards pathogenesis of the disease. In this article, we provide an overview of the current biology of IL-18 and its antagonist, discuss how the imbalance occurs in HIV infections and how it contributes towards development of AIDS and other non-AIDS-associated clinical conditions occurring in HIV-infected individuals undergoing combination anti-retroviral therapy (cART). Finally, we discuss challenges facing immunotherapeutic strategies aimed at restoring balance between IL-18 and its antagonist in these patients.
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Affiliation(s)
- Suzanne Samarani
- Laboratory of Innate Immunity, Canada; CHU-Sainte-Justine Research Center, Canada; Department of Microbiology, Infectiology & Immunology, Canada; University of Montreal, Montreal, Canada
| | - Ossama Allam
- Laboratory of Innate Immunity, Canada; CHU-Sainte-Justine Research Center, Canada; Department of Microbiology, Infectiology & Immunology, Canada; University of Montreal, Montreal, Canada
| | - Patrick Sagala
- Laboratory of Innate Immunity, Canada; CHU-Sainte-Justine Research Center, Canada; Department of Microbiology, Infectiology & Immunology, Canada; University of Montreal, Montreal, Canada
| | - Zainab Aldabah
- Laboratory of Innate Immunity, Canada; CHU-Sainte-Justine Research Center, Canada; Department of Microbiology, Infectiology & Immunology, Canada; University of Montreal, Montreal, Canada
| | | | - Vikram Mehraj
- McGill University Health Center, McGill University, Montreal, Canada
| | - Cécile Tremblay
- Department of Microbiology, Infectiology & Immunology, Canada; Division of Infectious Diseases, CHUM, Canada; University of Montreal, Montreal, Canada
| | - Jean-Pierre Routy
- McGill University Health Center, McGill University, Montreal, Canada
| | - Devendra Amre
- CHU-Sainte-Justine Research Center, Canada; Department of Pediatrics, Canada; University of Montreal, Montreal, Canada
| | - Ali Ahmad
- Laboratory of Innate Immunity, Canada; CHU-Sainte-Justine Research Center, Canada; Department of Microbiology, Infectiology & Immunology, Canada; University of Montreal, Montreal, Canada.
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Interleukin-1 Family Cytokines in Liver Diseases. Mediators Inflamm 2015; 2015:630265. [PMID: 26549942 PMCID: PMC4624893 DOI: 10.1155/2015/630265] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Accepted: 09/27/2015] [Indexed: 02/06/2023] Open
Abstract
The gene encoding IL-1 was sequenced more than 30 years ago, and many related cytokines, such as IL-18, IL-33, IL-36, IL-37, IL-38, IL-1 receptor antagonist (IL-1Ra), and IL-36Ra, have since been identified. IL-1 is a potent proinflammatory cytokine and is involved in various inflammatory diseases. Other IL-1 family ligands are critical for the development of diverse diseases, including inflammatory and allergic diseases. Only IL-1Ra possesses the leader peptide required for secretion from cells, and many ligands require posttranslational processing for activation. Some require inflammasome-mediated processing for activation and release, whereas others serve as alarmins and are released following cell membrane rupture, for example, by pyroptosis or necroptosis. Thus, each ligand has the proper molecular process to exert its own biological functions. In this review, we will give a brief introduction to the IL-1 family cytokines and discuss their pivotal roles in the development of various liver diseases in association with immune responses. For example, an excess of IL-33 causes liver fibrosis in mice via activation and expansion of group 2 innate lymphoid cells to produce type 2 cytokines, resulting in cell conversion into pro-fibrotic M2 macrophages. Finally, we will discuss the importance of IL-1 family cytokine-mediated molecular and cellular networks in the development of acute and chronic liver diseases.
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Elevated levels of serum IL-12 and IL-18 are associated with lower frequencies of CD4(+)CD25 (high)FOXP3 (+) regulatory t cells in young patients with type 1 diabetes. Inflammation 2015; 37:1513-20. [PMID: 24677179 PMCID: PMC4174326 DOI: 10.1007/s10753-014-9878-1] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Type 1 diabetes is thought to involve chronic inflammation, which is manifested by the activation and expression of different inflammatory mediators. IL-12 and IL-18 are two cytokines that have been shown to exert strong proinflammatory activity and have been implicated in the pathogenesis of type 1 diabetes in mice and humans. The overproduction of proinflammatory mediators is controlled by specialized T cell subset, namely regulatory T cells that express FOXP3 transcription factor. Since IL-12 and IL-18 mediate inflammatory response and Tregs exhibit anti-inflammatory potential, we aimed to examine their reciprocal relationship in patients with type 1 diabetes. The study group consisted of 47 children diagnosed with type 1 diabetes and 28 healthy individuals. Serum levels of IL-12 and IL-18 were measured by ELISA, and the peripheral blood CD4+CD25high FOXP3+ regulatory T cell frequencies were analyzed by flow cytometry. Patients with type 1 diabetes had a decreased percentage of circulating CD4+CD25highFOXP3+ Tregs in comparison to their healthy counterparts. In addition, they produced more IL-12 and IL-18 than children from the control group. Concentrations of these cytokines positively correlated with one another, as well as with CRP and HbA1c. Moreover, the negative association between IL-12, IL-18, CRP serum levels, and the frequency of regulatory CD4+CD25highFOXP3+ Tregs was observed. IL-12 and IL-18 may have direct or indirect impact on regulatory T cell subset, which may contribute to their reduced frequency in peripheral blood of patients with type 1 diabetes mellitus.
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Fan J, Zhang X, Ren L, Chen D, Wu S, Guo F, Qin S, Wang Z, Lin Z, Xing T, Sun X, Peng Z. Donor IL-18 rs5744247 polymorphism as a new biomarker of tacrolimus elimination in Chinese liver transplant patients during the early post-transplantation period: results from two cohort studies. Pharmacogenomics 2015; 16:239-50. [PMID: 25712187 DOI: 10.2217/pgs.14.166] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Aim: This study evaluated the relationships between IL-18 polymorphisms and tacrolimus elimination in Chinese liver transplant patients. Patients & methods: Eighty-four liver transplant patients from Shanghai (training set) and 50 patients from Shandong (validating set) were inculded. IL-18 polymorphisms (rs5744247, rs7106524, rs549908, rs187238 and rs1946518) and CYP3A5 rs776746 were genotyped. Results: In training set, daily drug dose, total bilirubin, donor CYP3A5 rs776746 and IL-18 rs5744247 genotypes were screened to construct prediction model for tacrolimus elimination. This model was confirmed in validating set (p < 0.001). Donor IL-18 rs5744247 polymorphism was an independent predictor of tacrolimus elimination in the first week after transplantation in both training (p = 0.008) and validating cohorts (p = 0.033). Conclusion: Donor IL-18 rs5744247 polymorphism may influence on tacrolimus elimination. Original submitted 16 July 2014; Revision submitted 12 November 2014
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Affiliation(s)
- Junwei Fan
- Department of General Surgery, Shanghai First People's Hospital, Shanghai Jiaotong University, Shanghai, China
| | - Xiaoqing Zhang
- Department of Pharmacy, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China
| | - Lei Ren
- Department of Hepatobiliary Pancreatic Surgery, Shandong Qianfoshan Hospital, Shandong University, Jinan, China
| | - Dawei Chen
- Department of General Surgery, Shanghai First People's Hospital, Shanghai Jiaotong University, Shanghai, China
| | - Shaohan Wu
- Department of General Surgery, Shanghai First People's Hospital, Shanghai Jiaotong University, Shanghai, China
| | - Feng Guo
- Department of General Surgery, Shanghai First People's Hospital, Shanghai Jiaotong University, Shanghai, China
| | - Shengying Qin
- Bio-X Institutes, Shanghai Jiao Tong University, Shanghai, China
| | - Zhaowen Wang
- Department of General Surgery, Shanghai First People's Hospital, Shanghai Jiaotong University, Shanghai, China
| | - Zhong Lin
- Department of General Surgery, Shanghai First People's Hospital, Shanghai Jiaotong University, Shanghai, China
| | - Tonghai Xing
- Department of General Surgery, Shanghai First People's Hospital, Shanghai Jiaotong University, Shanghai, China
| | - Xing Sun
- Department of General Surgery, Shanghai First People's Hospital, Shanghai Jiaotong University, Shanghai, China
| | - Zhihai Peng
- Department of General Surgery, Shanghai First People's Hospital, Shanghai Jiaotong University, Shanghai, China
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Netea MG, van de Veerdonk FL, van der Meer JWM, Dinarello CA, Joosten LAB. Inflammasome-independent regulation of IL-1-family cytokines. Annu Rev Immunol 2014; 33:49-77. [PMID: 25493334 DOI: 10.1146/annurev-immunol-032414-112306] [Citation(s) in RCA: 250] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Induction, production, and release of proinflammatory cytokines are essential steps to establish an effective host defense. Cytokines of the interleukin-1 (IL-1) family induce inflammation and regulate T lymphocyte responses while also displaying homeostatic and metabolic activities. With the exception of the IL-1 receptor antagonist, all IL-1 family cytokines lack a signal peptide and require proteolytic processing into an active molecule. One such unique protease is caspase-1, which is activated by protein platforms called the inflammasomes. However, increasing evidence suggests that inflammasomes and caspase-1 are not the only mechanism for processing IL-1 cytokines. IL-1 cytokines are often released as precursors and require extracellular processing for activity. Here we review the inflammasome-independent enzymatic processes that are able to activate IL-1 cytokines, paying special attention to neutrophil-derived serine proteases, which subsequently induce inflammation and modulate host defense. The inflammasome-independent processing of IL-1 cytokines has important consequences for understanding inflammatory diseases, and it impacts the design of IL-1-based modulatory therapies.
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Doorschodt B, Teubner A, Kobayashi E, Tolba R. Promising future for the transgenic rat in transplantation research. Transplant Rev (Orlando) 2014; 28:155-62. [DOI: 10.1016/j.trre.2014.05.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2014] [Revised: 04/02/2014] [Accepted: 05/20/2014] [Indexed: 01/17/2023]
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Wang W, Wang C, Ding XQ, Pan Y, Gu TT, Wang MX, Liu YL, Wang FM, Wang SJ, Kong LD. Quercetin and allopurinol reduce liver thioredoxin-interacting protein to alleviate inflammation and lipid accumulation in diabetic rats. Br J Pharmacol 2014; 169:1352-71. [PMID: 23647015 DOI: 10.1111/bph.12226] [Citation(s) in RCA: 133] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2012] [Revised: 02/21/2013] [Accepted: 04/11/2013] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND AND PURPOSE Thioredoxin-interacting protein (TXNIP), a regulator of cellular oxidative stress, has been associated with activation of NOD-like receptor 3 (NLRP3) inflammasome, inflammation and lipid metabolism, suggesting it has a role in the pathogenesis of non-alcoholic fatty liver disease (NAFLD) in diabetes. In this study we investigated whether TXNIP is involved in type 1 diabetes-associated NAFLD and whether antioxidants, quercetin and allopurinol, alleviate NAFLD by targeting TXNIP. EXPERIMENTAL APPROACH Diabetes was induced in male Sprague-Dawley rats by a single i.p. injection of 55 mg · kg⁻¹ streptozotocin. Quercetin and allopurinol were given p.o. to diabetic rats for 7 weeks. Hepatic function, oxidative stress, inflammation and lipid levels were determined. Rat BRL-3A and human HepG2 cells were exposed to high glucose (30 mM) in the presence and absence of antioxidants, TXNIP siRNA transfection or caspase-1 inhibitor, Ac-YVAD-CMK. KEY RESULTS Quercetin and allopurinol significantly inhibited the TXNIP overexpression, activation of NLRP3 inflammasome, down-regulation of PPARα and up-regulation of sterol regulatory element binding protein-1c (SREBP-1c), SREBP-2, fatty acid synthase and liver X receptor α, as well as elevation of ROS and IL-1β in diabetic rat liver. These effects were confirmed in hepatocytes in vitro and it was further shown that TXNIP down-regulation contributed to the suppression of NLRP3 inflammasome activation, inflammation and changes in PPARα and SREBPs. CONCLUSIONS AND IMPLICATIONS Inhibition of hepatic TXNIP by quercetin and allopurinol contributes to the reduction in liver inflammation and lipid accumulation under hyperglycaemic conditions. The targeting of hepatic TXNIP by quercetin and allopurinol may have therapeutic implications for prevention of type 1 diabetes-associated NAFLD.
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Affiliation(s)
- Wei Wang
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, China
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Mandour M, Nemr N, Kishk R, Ahmed E. Impact of the IL-18 gene polymorphism in response to antiviral therapy in chronic HCV genotype 4 patients. Rev Soc Bras Med Trop 2014; 47:137-42. [PMID: 24861285 DOI: 10.1590/0037-8682-0024-2014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Accepted: 04/11/2014] [Indexed: 05/28/2023] Open
Abstract
INTRODUCTION Interleukin (IL)-18 is a well-known major proinflammatory cytokine with broad biological effects. The major immunomodulatory functions of IL-18 include enhancing T cell and natural killer cell cytotoxicity. Serum levels of this cytokine were shown to increase in chronic hepatitis C patients compared to non-infected healthy people. An association between IL-18 gene promoter polymorphisms and pegylated interferon (PEG-IFN) and ribavirin treatment outcomes has been reported for individuals with chronic hepatitis C virus genotype 1 (HCV-1). In this study, HCV genotype 4 (HCV-4) patients were assessed for IL-18 gene polymorphisms and treatment outcomes or severity of liver disease because data concerning the impact of IL-18 gene polymorphisms on patients with HCV-4 infections are limited. METHODS This study included 123 chronic HCV-4 Egyptian patients and 123 apparently healthy volunteer blood donors who served as a control group. HCV genotyping was performed using the line probe assay. IL-18 genotyping was performed using the TaqMan Real-Time PCR method in all 246 patient and control samples. RESULTS In our study, all patients had HCV-4. IL-18 gene single nucleotide polymorphism (SNP) (-607C/A) genotype distributions and allele frequencies did not differ between HCV patients and normal healthy subjects or between patient groups when compared according to the therapeutic response. Moreover, the presence of an IL-18 SNP was not associated with histological disease severity. We conclude that the presence of the IL-18 SNP rs1946518 does not affect the outcome of chronic HCV-4 treatment in Egyptian patients. CONCLUSIONS The IL-18 SNP rs1946518 does not affect response to treatment in chronic HCV-4 patients.
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Affiliation(s)
- Mohamed Mandour
- Department of Clinical Pathology, Faculty of Medicine, Suez Canal University, Ismailia, Egypt
| | - Nader Nemr
- Department of Endemic and Infectious Diseases, Faculty of Medicine, Suez Canal University, Ismailia, Egypt
| | - Rania Kishk
- Department of Microbiology and Immunology, Faculty of Medicine, Suez Canal University, Ismailia, Egypt
| | - Eman Ahmed
- Department of Clinical Pharmacology, Faculty of Medicine, Suez Canal University, Ismailia, Egypt
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Abstract
Persistent viral infection, such as HCV infection, is the result of the inability of the host immune system to mount a successful antiviral response, as well as the escape strategies devised by the virus. Although each individual component of the host immune system plays important roles in antiviral immunity, the interactive network of immune cells as a whole acts against the virus. The innate immune system forms the first line of host defense against viral infection, and thus, virus elimination or chronic HCV infection is linked to the direct outcome of the interactions between the various innate immune cells and HCV. By understanding how the distinct components of the innate immune system function both individually and collectively during HCV infection, potential therapeutic targets can be identified to overcome immune dysfunction and control chronic viral infection.
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Affiliation(s)
- Banishree Saha
- University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Gyongyi Szabo
- University of Massachusetts Medical School, Worcester, Massachusetts, USA
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Adachi K, Nakamura R, Osada Y, Senba M, Tamada K, Hamano S. Involvement of IL-18 in the expansion of unique hepatic T cells with unconventional cytokine profiles during Schistosoma mansoni infection. PLoS One 2014; 9:e96042. [PMID: 24824897 PMCID: PMC4019514 DOI: 10.1371/journal.pone.0096042] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2013] [Accepted: 04/02/2014] [Indexed: 12/31/2022] Open
Abstract
Infection with schistosomes invokes severe fibrotic granulomatous responses in the liver of the host. Schistosoma mansoni infection induces dramatic fluctuations in Th1 or Th2 cytokine responses systemically; Th1 reactions are provoked in the early phase, whilst Th2 responses become dominant after oviposition begins. In the liver, various unique immune cells distinct from those of conventional immune competent organs or tissues exist, resulting in a unique immunological environment. Recently, we demonstrated that S. mansoni infection induces unique CD4+ T cell populations exhibiting unconventional cytokine profiles in the liver of mice during the period between Th1- and Th2-phases, which we term the transition phase. They produce both IFN-γ and IL-4 or both IFN-γ and IL-13 simultaneously. Moreover, T cells secreting triple cytokines IFN-γ, IL-13 and IL-4 were also induced. We term these cells Multiple Cytokine Producing Hepatic T cells (MCPHT cells). During the transition phase, when MCPHT cells increase, IL-18 secretion was up-regulated in the liver and sera. In S. mansoni-infected IL-18-deficient mice, expansion of MCPHT cells was curtailed. Thus our data suggest that IL-18 produced during S. mansoni infection play a role in the expansion of MCPHT cells.
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Affiliation(s)
- Keishi Adachi
- Department of Parasitology, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
- Global Center of Excellence Program, Nagasaki University, Nagasaki, Japan
| | - Risa Nakamura
- Department of Parasitology, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
| | - Yoshio Osada
- Department of Immunology and Parasitology, The University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Masachika Senba
- Department of Pathology, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
| | - Koji Tamada
- Department of Immunology and Cell Signaling Analysis, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Shinjiro Hamano
- Department of Parasitology, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
- Global Center of Excellence Program, Nagasaki University, Nagasaki, Japan
- * E-mail:
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Tsutsui H, Nishiguchi S. Importance of Kupffer cells in the development of acute liver injuries in mice. Int J Mol Sci 2014; 15:7711-30. [PMID: 24802875 PMCID: PMC4057701 DOI: 10.3390/ijms15057711] [Citation(s) in RCA: 108] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Revised: 04/30/2014] [Accepted: 04/30/2014] [Indexed: 12/12/2022] Open
Abstract
Kupffer cells reside within the liver sinusoid and serve as gatekeepers. They produce pro- and anti-inflammatory cytokines and other biologically important molecules upon the engagement of pattern recognition receptors such as Toll-like receptors. Kupffer cell-ablated mice established by in vivo treatment with clodronate liposomes have revealed many important features of Kupffer cells. In this paper, we review the importance of Kupffer cells in murine acute liver injuries and focus on the following two models: lipopolysaccharide (LPS)-induced liver injury, which is induced by priming with Propionibacterium acnes and subsequent challenge with LPS, and hypercoagulability-mediated acute liver failure such as that in concanavalin A (Con A)-induced hepatitis. Kupffer cells are required for LPS sensitization induced by P. acnes and are a major cellular source of interleukin-18, which induces acute liver injury following LPS challenge. Kupffer cells contribute to Con A-induced acute liver failure by initiating pathogenic, intrasinusoidal thrombosis in collaboration with sinusoidal endothelial cells. The mechanisms underlying these models may shed light on human liver injuries induced by various etiologies such as viral infection and/or abnormal metabolism.
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Affiliation(s)
- Hiroko Tsutsui
- Department of Microbiology, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya 663-8501, Japan.
| | - Shuhei Nishiguchi
- Department of Internal Medicine, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya 663-8501, Japan.
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41
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Meli R, Mattace Raso G, Calignano A. Role of innate immune response in non-alcoholic Fatty liver disease: metabolic complications and therapeutic tools. Front Immunol 2014; 5:177. [PMID: 24795720 PMCID: PMC4005965 DOI: 10.3389/fimmu.2014.00177] [Citation(s) in RCA: 101] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Accepted: 04/04/2014] [Indexed: 12/12/2022] Open
Abstract
Non-alcoholic fatty liver disease (NAFLD) is currently the most common liver disease worldwide, both in adults and children. It is characterized by an aberrant lipid storage in hepatocytes, named hepatic steatosis. Simple steatosis remains a benign process in most affected patients, while some of them develop superimposed necroinflammatory activity with a non-specific inflammatory infiltrate and a progression to non-alcoholic steatohepatitis with or without fibrosis. Deep similarity and interconnections between innate immune cells and those of liver parenchyma have been highlighted and showed to play a key role in the development of chronic liver disease. The liver can be considered as an “immune organ” because it hosts non-lymphoid cells, such as macrophage Kupffer cells, stellate and dendritic cells, and lymphoid cells. Many of these cells are components of the classic innate immune system, enabling the liver to play a major role in response to pathogens. Although the liver provides a “tolerogenic” environment, aberrant activation of innate immune signaling may trigger “harmful” inflammation that contributes to tissue injury, fibrosis, and carcinogenesis. Pathogen recognition receptors, such as toll-like receptors and nucleotide oligomerization domain-like receptors, are responsible for the recognition of immunogenic signals, and represent the major conduit for sensing hepatic and non-hepatic noxious stimuli. A pivotal role in liver inflammation is also played by cytokines, which can initiate or have a part in immune response, triggering hepatic intracellular signaling pathways. The sum of inflammatory signals and deranged substrate handling induce most of the metabolic alteration traits: insulin resistance, obesity, diabetes, hyperlipidemia, and their compounded combined effects. In this review, we discuss the relevant role of innate immune cell activation in relation to NAFLD, the metabolic complications associated to this pathology, and the possible pharmacological tools.
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Affiliation(s)
- Rosaria Meli
- Department of Pharmacy, University of Naples "Federico II" , Naples , Italy
| | | | - Antonio Calignano
- Department of Pharmacy, University of Naples "Federico II" , Naples , Italy
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Anti-inflammatory and Antiapoptotic Effect of Interleukine-18 Binding Protein on the Spinal Cord Ischemia-Reperfusion Injury. Inflammation 2014; 37:917-23. [DOI: 10.1007/s10753-014-9811-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Adachi K, Osada Y, Nakamura R, Tamada K, Hamano S. Unique T cells with unconventional cytokine profiles induced in the livers of mice during Schistosoma mansoni infection. PLoS One 2013; 8:e82698. [PMID: 24358216 PMCID: PMC3865148 DOI: 10.1371/journal.pone.0082698] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Accepted: 10/26/2013] [Indexed: 12/31/2022] Open
Abstract
During infection with Schistosoma, serious hepatic disorders are induced in the host. The liver possesses unique immune systems composed of specialized cells that differ from those of other immune competent organs or tissues. Host immune responses change dramatically during Schistosoma mansoni infection; in the early phase, Th1-related responses are induced, whereas during the late phase Th2 reactions dominate. Here, we describe unique T cell populations induced in the liver of mice during the period between Th1- and Th2-phases, which we term the transition phase. During this phase, varieties of immune cells including T lymphocytes increase in the liver. Subsets of CD4+ T cells exhibit unique cytokine production profiles, simultaneously producing both IFN-γ and IL-13 or both IFN-γ and IL-4. Furthermore, cells triply positive for IFN-γ, IL-13 and IL-4 also expand in the S. mansoni-infected liver. The induction of these unique cell populations does not occur in the spleen, indicating it is a phenomenon specific to the liver. In single hepatic CD4+ T cells showing the unique cytokine profiles, both T-bet and GATA-3 are expressed. Thus, our studies show that S. mansoni infection triggers the induction of hepatic T cell subsets with unique cytokine profiles.
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Affiliation(s)
- Keishi Adachi
- Department of Parasitology, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
- Global Center of Excellence Program, Nagasaki University, Nagasaki, Japan
| | - Yoshio Osada
- Department of Immunology and Parasitology, The University of Occupational and Environmental Health, Yahatanishi-ku, Kitakyushu, Japan
| | - Risa Nakamura
- Department of Parasitology, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
| | - Koji Tamada
- Department of Immunology and Cell Signaling Analysis, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Shinjiro Hamano
- Department of Parasitology, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
- Global Center of Excellence Program, Nagasaki University, Nagasaki, Japan
- * E-mail:
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44
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Abstract
Together with IL-12 or IL-15, interleukin-18 (IL-18) plays a major role in the production of interferon-γ from T-cells and natural killer cells; thus, IL-18 is considered to have a major role in the Th1 response. However, without IL-12, IL-18 is proinflammatory in an IFNγ independent manner. IL-18 is a member of the IL-1 family of cytokines and similar to IL-1β, the cytokine is synthesized as an inactive precursor requiring processing by caspase-1 into an active cytokine. IL-18 is also present as an integral membrane protein but requires caspase-1 for full activity in order to induce IFNγ. Uniquely, unlike IL-1β, the IL-18 precursor is constitutively present in nearly all cells in healthy humans and animals. The activity of IL-18 is balanced by the presence of a high-affinity, naturally occurring IL-18 binding protein (IL-18BP). In humans, increased disease severity can be associated with an imbalance of IL-18 to IL-18BP such that the levels of free IL-18 are elevated in the circulation. Increasing number of studies have expanded the role of IL-18 in mediating inflammation in animal models of disease using the IL-18BP, IL-18 deficient mice, neutralization of IL-18 or deficiency in the IL-18 receptor alpha chain. A role for IL-18 has been implicated in several autoimmune diseases, myocardial function, emphysema, metabolic syndromes, psoriasis, inflammatory bowel disease, macrophage activation syndrome, sepsis and acute kidney injury, although paradoxically, in some models of disease, IL-18 is protective. The IL-18BP has been used safely in humans and clinical trials of IL-18BP as well as neutralizing anti-IL-18 antibodies are being tested in various diseases.
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Affiliation(s)
- Daniela Novick
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, Israel
| | - Soohyun Kim
- Department of Biomedical Science and Technology, Konkuk University, Seoul, Republic of Korea
| | - Gilles Kaplanski
- UMR-S1076, Aix Marseille Université, Campus Timone, Marseille, France; Service de Médecine Interne, Hôpital de la Conception, Assistance Publique Hôpitaux de Marseille, Marseille, France
| | - Charles A Dinarello
- Department of Medicine, University of Colorado Denver, Aurora, CO, United States; Department of Medicine, University Medical Center Nijmegen, Nijmegen, The Netherlands.
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Dinarello CA, Novick D, Kim S, Kaplanski G. Interleukin-18 and IL-18 binding protein. Front Immunol 2013; 4:289. [PMID: 24115947 PMCID: PMC3792554 DOI: 10.3389/fimmu.2013.00289] [Citation(s) in RCA: 601] [Impact Index Per Article: 54.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Accepted: 09/04/2013] [Indexed: 12/15/2022] Open
Abstract
Interleukin-18 (IL-18) is a member of the IL-1 family of cytokines. Similar to IL-1β, IL-18 is synthesized as an inactive precursor requiring processing by caspase-1 into an active cytokine but unlike IL-1β, the IL-18 precursor is constitutively present in nearly all cells in healthy humans and animals. The activity of IL-18 is balanced by the presence of a high affinity, naturally occurring IL-18 binding protein (IL-18BP). In humans, increased disease severity can be associated with an imbalance of IL-18 to IL-18BP such that the levels of free IL-18 are elevated in the circulation. Increasing number of studies have expanded the role of IL-18 in mediating inflammation in animal models of disease using the IL-18BP, IL-18-deficient mice, neutralization of IL-18, or deficiency in the IL-18 receptor alpha chain. A role for IL-18 has been implicated in several autoimmune diseases, myocardial function, emphysema, metabolic syndromes, psoriasis, inflammatory bowel disease, hemophagocytic syndromes, macrophage activation syndrome, sepsis, and acute kidney injury, although in some models of disease, IL-18 is protective. IL-18 plays a major role in the production of interferon-γ from T-cells and natural killer cells. The IL-18BP has been used safely in humans and clinical trials of IL-18BP as well as neutralizing anti-IL-18 antibodies are in clinical trials. This review updates the biology of IL-18 as well as its role in human disease.
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Affiliation(s)
- Charles A Dinarello
- Department of Medicine, University of Colorado Denver , Aurora, CO , USA ; Department of Medicine, University Medical Center Nijmegen , Nijmegen , Netherlands
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46
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Abstract
To become active and extracellularly released, IL-18 needs post-translational processing by the cytoplasmic enzyme caspase-1, which has high sequence homology with apoptotic cell death-associated enzymes in Caenorhabditis elegans. Furthermore, the receptor for IL-18 shares the signal transduction pathway with the Toll-like receptor, which highly resembles that for the host defense in Drosophila. Since nonvertebrates utilize only innate immunity, it is plausible that IL-18 is an innate immune cytokine. IL-18 is produced by both immune and nonimmune cells, and influences both immunity and nonimmune biology with dual functions beneficial for health and causative of diseases. In this review, recently identified features of IL-18 will be focused upon, followed by discussion of IL-18 as a possible therapeutic target.
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Affiliation(s)
- Hiroko Tsutsui
- Department of Microbiology, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya 663-8501, Japan
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Howell J, Angus P, Gow P, Visvanathan K. Toll-like receptors in hepatitis C infection: implications for pathogenesis and treatment. J Gastroenterol Hepatol 2013; 28:766-76. [PMID: 23432473 DOI: 10.1111/jgh.12170] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/03/2013] [Indexed: 02/06/2023]
Abstract
Hepatitis C virus (HCV) infection is a significant global health problem, affecting over 150 million people worldwide. While the critical role of the adaptive immune system in HCV infection is well-established, the importance of the innate immune system in HCV infection has only been recognized in more recent years. Toll-like receptors form the cornerstone of the innate immune response, and there is considerable evidence for their crucial role in hepatitis C infection. This review outlines recent advances made in our understanding of the role of Toll-like receptor function in HCV infection, exploring how HCV manipulates host immunity to evade immune clearance and establish persistent infection despite leading to inflammatory hepatic damage.
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Affiliation(s)
- Jessica Howell
- Liver Transplant Unit, Austin Hospital, Victoria, Australia.
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48
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Zheng S, Sugita S, Hirai S, Egashira Y. Protective effect of low molecular fraction of MGN-3, a modified arabinoxylan from rice bran, on acute liver injury by inhibition of NF-κB and JNK/MAPK expression. Int Immunopharmacol 2012; 14:764-9. [DOI: 10.1016/j.intimp.2012.10.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Revised: 07/30/2012] [Accepted: 10/12/2012] [Indexed: 12/22/2022]
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Fang Q, Pan Z, Geng S, Kang X, Huang J, Sun X, Li Q, Cai Y, Jiao X. Molecular cloning, characterization and expression of goose Toll-like receptor 5. Mol Immunol 2012; 52:117-24. [DOI: 10.1016/j.molimm.2012.05.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2012] [Revised: 05/07/2012] [Accepted: 05/07/2012] [Indexed: 12/18/2022]
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50
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Chiossone L, Audonnet S, Chetaille B, Chasson L, Farnarier C, Berda-Haddad Y, Jordan S, Koszinowski UH, Dalod M, Mazodier K, Novick D, Dinarello CA, Vivier E, Kaplanski G. Protection from inflammatory organ damage in a murine model of hemophagocytic lymphohistiocytosis using treatment with IL-18 binding protein. Front Immunol 2012; 3:239. [PMID: 22891066 PMCID: PMC3413989 DOI: 10.3389/fimmu.2012.00239] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2011] [Accepted: 07/17/2012] [Indexed: 01/25/2023] Open
Abstract
Hemophagocytic lymphohistiocytosis (HLH) is a life-threatening condition due to the association of an infectious agent with lymphocyte cytotoxicity defects, either of congenital genetic origin in children or presumably acquired in adults. In HLH patients, an excess of lymphocyte or macrophage cytokines, such as IFN-γ and TNFα is present in serum. In animal models of the disease, IFN-γ and TNF-α have been shown to play a central pathogenic role. In humans, unusually high concentrations of IL-18, an inducer of IFN-γ, and TNF-α have been reported, and are associated with an imbalance between IL-18 and its natural inhibitor IL-18 binding protein (IL-18BP) resulting in an excess of free IL-18. Here we studied whether IL-18BP could reduce disease severity in an animal model of HLH. Mouse cytomegalovirus infection in perforin-1 knock-out mice induced a lethal condition similar to human HLH characterized by cytopenia with marked inflammatory lesions in the liver and spleen as well as the presence of hemophagocytosis in bone marrow. IL-18BP treatment decreased hemophagocytosis and reversed liver as well as spleen damage. IL-18BP treatment also reduced both IFN-γ and TNF-α production by CD8(+) T and NK cells, as well as Fas ligand expression on NK cell surface. These data suggest that IL-18BP is beneficial in an animal model of HLH and in combination with anti-infectious therapy may be a promising strategy to treat HLH patients.
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Affiliation(s)
- Laura Chiossone
- Centre d'Immunologie de Marseille-Luminy, INSERM, U 1104 Marseille, France
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