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Huang X, Fei Y, Qiu X, Qian T, Shang Q, Cui J, Song Y, Sheng S, Xiao W, Yu Q, Wang T, Wang X. MiR-625-5p is a potential therapeutic target in sepsis by regulating CXCL16/CXCR6 axis and endothelial barrier. Int Immunopharmacol 2024; 137:112508. [PMID: 38889512 DOI: 10.1016/j.intimp.2024.112508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2024] [Revised: 06/14/2024] [Accepted: 06/15/2024] [Indexed: 06/20/2024]
Abstract
BACKGROUND MicroRNA plays an important role in the progression of sepsis. We found a significant increase of in miR-625-5p expression in the blood of patients with sepsis, and lipopolysaccharide (LPS)-stimulated EA.hy926 cells. To date, little is known about the specific biological function of miR-625-5p in sepsis. METHODS Changes in miR-625-5p expression were verified through quantitative real-time polymerase chain reaction in 45 patients with sepsis or septic shock and 30 healthy subjects. In vitro, EA.hy926 cells were treated with LPS. Transendothelial electrical resistance assay and FITC-dextran were used in evaluating endothelial barrier function. RESULTS Herein, patients with sepsis or septic shock had significantly higher miR-625-5p expression levels, chemokine (C-X-C motif) ligand 16 (CXCL16) levels, and glycocalyx components than the healthy controls, and miR-625-5p level was positively correlated with disease. Kaplan-Meier analysis demonstrated a strong association between miR-625-5p level and 28-day mortality. Furthermore, the miR-625-5p inhibitor significantly alleviated LPS-induced endothelial barrier injury in vitro. Then, miR-625-5p positively regulated CXCL16 and down-regulated miR-625-5p attenuated CXCL16 transcription and expression in EA.hy926 cells. CXCL16 knockout significantly alleviated vascular barrier dysfunction in the LPS-induced EA.hy926 cells. sCXCL16 treatment in EA.hy926 cells significantly increased endothelial hyperpermeability by disrupting endothelial glycocalyx, tight junction proteins, and adherens junction proteins through the modulation of C-X-C chemokine receptor type 6 (CXCR6). CONCLUSIONS Increase in miR-625-5p level may be an effective biomarker for predicting 28-day mortality in patients with sepsis/septic shock. miR-625-5p is a critical pathogenic factor for endothelial barrier dysfunction in LPS-induced EA.hy926 cells because it activates the CXCL16/CXCR6 axis.
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Affiliation(s)
- Xiao Huang
- Department of Intensive Care Unit, Binzhou Medical University Hospital, Binzhou, Shandong, China
| | - Yuxin Fei
- Department of Intensive Care Unit, Binzhou Medical University Hospital, Binzhou, Shandong, China
| | - Xiaoyu Qiu
- Department of Intensive Care Unit, Binzhou Medical University Hospital, Binzhou, Shandong, China; Department of Pulmonary and Critical Care Medicine, Yantai Yuhuangding Hospital, Yantai, Shandong, China
| | - Tiantian Qian
- Department of Respiratory Medicine, Ji'nan Zhangqiu District People's Hospital, No. 1920 Mingshuihuiquan Road, Ji'nan, 250200, Shandong, China
| | - Quanmei Shang
- Department of Intensive Care Unit, Binzhou Medical University Hospital, Binzhou, Shandong, China
| | - Jinfeng Cui
- Department of Intensive Care Unit, Binzhou Medical University Hospital, Binzhou, Shandong, China
| | - Yutong Song
- Department of Intensive Care Unit, Binzhou Medical University Hospital, Binzhou, Shandong, China
| | - Shurui Sheng
- Department of Intensive Care Unit, Binzhou Medical University Hospital, Binzhou, Shandong, China
| | - Wenhan Xiao
- Department of Intensive Care Unit, Binzhou Medical University Hospital, Binzhou, Shandong, China
| | - Qilin Yu
- Department of Intensive Care Unit, Binzhou Medical University Hospital, Binzhou, Shandong, China
| | - Tao Wang
- Department of Intensive Care Unit, Binzhou Medical University Hospital, Binzhou, Shandong, China.
| | - Xiaozhi Wang
- Department of Intensive Care Unit, Binzhou Medical University Hospital, Binzhou, Shandong, China.
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Wan Y, Mao M, Li M, Liu J, Tong X, Wang J, Li J, Yin S, Wu C. Serum CXCL16: A new predictor of liver inflammation in patients with chronic hepatitis B. J Viral Hepat 2024; 31:107-119. [PMID: 38146125 DOI: 10.1111/jvh.13905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 10/14/2023] [Accepted: 11/30/2023] [Indexed: 12/27/2023]
Abstract
The prompt initiation of antiviral therapy is essential in patients with chronic hepatitis B (CHB), especially when severe liver inflammation is detected. However, transcutaneous liver puncture, the gold standard for assessing liver inflammation, is invasive and its widespread application is limited. Therefore, there is an urgent need for more non-invasive markers to predict liver inflammation. In our retrospective cross-sectional study, which included 120 CHB patients and 31 healthy subjects, we observed a significant increase in serum chemokine C-X-C-motif ligand 16 (CXCL16) in CHB patients compared to healthy controls (p < .001). Notably, patients with severe inflammation (Scheuer's grade G ≥ 3, n = 26) exhibited a substantial increase in serum CXCL16 compared to those with non-severe inflammation (Scheuer's grade G < 3, n = 96) [(median, IQR), 0.42 (0.24-0.71) ng/mL vs. 1.01 (0.25-2.09) ng/mL, p < .001]. Furthermore, we developed a predictive model that combined CXCL16 with platelet count (PLT), alanine aminotransferase (ALT) and albumin (ALB) to accurately predict liver inflammation in CHB patients. This model was more effective than ALT alone in predicting liver inflammation (AUC, 0.92 vs. 0.81, p = .015). Additionally, using an HBV-transduced mouse model, we demonstrated that blocking CXCL16 led to a reduction in liver inflammation and impaired infiltration and function of natural killer T (NKT) and natural killer (NK) cells. These findings suggest that CXCL16 is a promising non-invasive biomarker of liver inflammation in CHB patients and may play a role in inducing liver inflammation via a NKT and NK cell pathway.
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Affiliation(s)
- Yawen Wan
- Department of Infectious Diseases, Nanjing Drum Tower Hospital Clinical College of Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Minxin Mao
- Department of Infectious Diseases, Nanjing Drum Tower Hospital Clinical College of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
| | - Ming Li
- Department of Infectious Diseases, Nanjing Drum Tower Hospital Clinical College of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
| | - Jiacheng Liu
- Department of Infectious Diseases, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu, China
| | - Xin Tong
- Department of Infectious Diseases, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu, China
| | - Jian Wang
- Department of Infectious Diseases, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu, China
| | - Jie Li
- Department of Infectious Diseases, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu, China
| | - Shengxia Yin
- Department of Infectious Diseases, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu, China
- Institute of Viruses and Infectious Diseases, Nanjing University, Nanjing, Jiangsu, China
| | - Chao Wu
- Department of Infectious Diseases, Nanjing Drum Tower Hospital Clinical College of Xuzhou Medical University, Xuzhou, Jiangsu, China
- Department of Infectious Diseases, Nanjing Drum Tower Hospital Clinical College of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
- Department of Infectious Diseases, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu, China
- Institute of Viruses and Infectious Diseases, Nanjing University, Nanjing, Jiangsu, China
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Liu J, Zhang J, Zhao X, Pan C, Liu Y, Luo S, Miao X, Wu T, Cheng X. Identification of CXCL16 as a diagnostic biomarker for obesity and intervertebral disc degeneration based on machine learning. Sci Rep 2023; 13:21316. [PMID: 38044363 PMCID: PMC10694141 DOI: 10.1038/s41598-023-48580-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 11/28/2023] [Indexed: 12/05/2023] Open
Abstract
Intervertebral disc degeneration (IDD) is the primary cause of neck and back pain. Obesity has been established as a significant risk factor for IDD. The objective of this study was to explore the molecular mechanisms affecting obesity and IDD by identifying the overlapping crosstalk genes associated with both conditions. The identification of specific diagnostic biomarkers for obesity and IDD would have crucial clinical implications. We obtained gene expression profiles of GSE70362 and GSE152991 from the Gene Expression Omnibus, followed by their analysis using two machine learning algorithms, least absolute shrinkage and selection operator and support vector machine-recursive feature elimination, which enabled the identification of C-X-C motif chemokine ligand 16 (CXCL16) as a shared diagnostic biomarker for obesity and IDD. Additionally, gene set variant analysis was used to explore the potential mechanism of CXCL16 in these diseases, and CXCL16 was found to affect IDD through its effect on fatty acid metabolism. Furthermore, correlation analysis between CXCL16 and immune cells demonstrated that CXCL16 negatively regulated T helper 17 cells to promote IDD. Finally, independent external datasets (GSE124272 and GSE59034) were used to verify the diagnostic efficacy of CXCL16. In conclusion, a common diagnostic biomarker for obesity and IDD, CXCL16, was identified using a machine learning algorithm. This study provides a new perspective for exploring the possible mechanisms by which obesity impacts the development of IDD.
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Affiliation(s)
- Jiahao Liu
- Department of Orthopedics, The Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China
- Institute of Orthopedics of Jiangxi Province, Nanchang, 330006, Jiangxi, China
| | - Jian Zhang
- Department of Orthopedics, The Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China
- Institute of Orthopedics of Jiangxi Province, Nanchang, 330006, Jiangxi, China
| | - Xiaokun Zhao
- Department of Orthopedics, The Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China
- Institute of Orthopedics of Jiangxi Province, Nanchang, 330006, Jiangxi, China
| | - Chongzhi Pan
- Department of Orthopedics, The Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China
- Institute of Orthopedics of Jiangxi Province, Nanchang, 330006, Jiangxi, China
| | - Yuchi Liu
- Department of Orthopedics, The Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China
- Institute of Orthopedics of Jiangxi Province, Nanchang, 330006, Jiangxi, China
| | - Shengzhong Luo
- Department of Orthopedics, The Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China
- Institute of Orthopedics of Jiangxi Province, Nanchang, 330006, Jiangxi, China
| | - Xinxin Miao
- Department of Orthopedics, The Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China
- Institute of Orthopedics of Jiangxi Province, Nanchang, 330006, Jiangxi, China
- Institute of Minimally Invasive Orthopedics, Nanchang University, Nanchang, 330006, Jiangxi, China
| | - Tianlong Wu
- Department of Orthopedics, The Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China
- Institute of Orthopedics of Jiangxi Province, Nanchang, 330006, Jiangxi, China
- Institute of Minimally Invasive Orthopedics, Nanchang University, Nanchang, 330006, Jiangxi, China
| | - Xigao Cheng
- Department of Orthopedics, The Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China.
- Institute of Orthopedics of Jiangxi Province, Nanchang, 330006, Jiangxi, China.
- Institute of Minimally Invasive Orthopedics, Nanchang University, Nanchang, 330006, Jiangxi, China.
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Patten DA, Wilkinson AL, O'Keeffe A, Shetty S. Scavenger Receptors: Novel Roles in the Pathogenesis of Liver Inflammation and Cancer. Semin Liver Dis 2022; 42:61-76. [PMID: 34553345 PMCID: PMC8893982 DOI: 10.1055/s-0041-1733876] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The scavenger receptor superfamily represents a highly diverse collection of evolutionarily-conserved receptors which are known to play key roles in host homeostasis, the most prominent of which is the clearance of unwanted endogenous macromolecules, such as oxidized low-density lipoproteins, from the systemic circulation. Members of this family have also been well characterized in their binding and internalization of a vast range of exogenous antigens and, consequently, are generally considered to be pattern recognition receptors, thus contributing to innate immunity. Several studies have implicated scavenger receptors in the pathophysiology of several inflammatory diseases, such as Alzheimer's and atherosclerosis. Hepatic resident cellular populations express a diverse complement of scavenger receptors in keeping with the liver's homeostatic functions, but there is gathering interest in the contribution of these receptors to hepatic inflammation and its complications. Here, we review the expression of scavenger receptors in the liver, their functionality in liver homeostasis, and their role in inflammatory liver disease and cancer.
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Affiliation(s)
- Daniel A. Patten
- National Institute for Health Research Birmingham Liver Biomedical Research Unit, Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom
- Centre for Liver and Gastrointestinal Research, Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom
| | - Alex L. Wilkinson
- National Institute for Health Research Birmingham Liver Biomedical Research Unit, Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom
- Centre for Liver and Gastrointestinal Research, Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom
| | - Ayla O'Keeffe
- National Institute for Health Research Birmingham Liver Biomedical Research Unit, Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom
- Centre for Liver and Gastrointestinal Research, Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom
| | - Shishir Shetty
- National Institute for Health Research Birmingham Liver Biomedical Research Unit, Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom
- Centre for Liver and Gastrointestinal Research, Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom
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The Role of CXCL16 in the Pathogenesis of Cancer and Other Diseases. Int J Mol Sci 2021; 22:ijms22073490. [PMID: 33800554 PMCID: PMC8036711 DOI: 10.3390/ijms22073490] [Citation(s) in RCA: 58] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 03/23/2021] [Accepted: 03/26/2021] [Indexed: 12/15/2022] Open
Abstract
CXCL16 is a chemotactic cytokine belonging to the α-chemokine subfamily. It plays a significant role in the progression of cancer, as well as the course of atherosclerosis, renal fibrosis, and non-alcoholic fatty liver disease (NAFLD). Since there has been no review paper discussing the importance of this chemokine in various diseases, we have collected all available knowledge about CXCL16 in this review. In the first part of the paper, we discuss background information about CXCL16 and its receptor, CXCR6. Next, we focus on the importance of CXCL16 in a variety of diseases, with an emphasis on cancer. We discuss the role of CXCL16 in tumor cell proliferation, migration, invasion, and metastasis. Next, we describe the role of CXCL16 in the tumor microenvironment, including involvement in angiogenesis, and its significance in tumor-associated cells (cancer associated fibroblasts (CAF), microglia, tumor-associated macrophages (TAM), tumor-associated neutrophils (TAN), mesenchymal stem cells (MSC), myeloid suppressor cells (MDSC), and regulatory T cells (Treg)). Finally, we focus on the antitumor properties of CXCL16, which are mainly caused by natural killer T (NKT) cells. At the end of the article, we summarize the importance of CXCL16 in cancer therapy.
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6
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Liver-Resident Memory CD8 + T Cells: Possible Roles in Chronic HBV Infection. Int J Mol Sci 2020; 22:ijms22010283. [PMID: 33396596 PMCID: PMC7795050 DOI: 10.3390/ijms22010283] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Revised: 12/25/2020] [Accepted: 12/25/2020] [Indexed: 12/19/2022] Open
Abstract
Achieving a functional cure for chronic hepatitis B virus (HBV) infection or complete elimination of HBV covalently closed circular DNA (cccDNA) has been challenging in the treatment of patients with chronic HBV infection. Although novel antivirals are being investigated, improving HBV-specific adaptive immune responses is also important for durable viral clearance. Tissue-resident memory CD8+ T (TRM) cells were recently reported as a T-cell population that resides in peripheral tissues and does not recirculate. TRM cells have been studied in the livers of mice and humans. Liver TRM cells have distinct characteristics compared to T cells in peripheral blood or other tissues, which may be associated with the unique microenvironment of the liver. In this review, we describe the characteristics of liver TRM cells and their implications in chronic HBV infection. We emphasize that liver TRM cells can be an immunotherapeutic target for the treatment of chronic HBV infection.
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7
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Koleini N, Nickel BE, Edel AL, Fandrich RR, Ravandi A, Kardami E. Oxidized phospholipids in Doxorubicin-induced cardiotoxicity. Chem Biol Interact 2019; 303:35-39. [DOI: 10.1016/j.cbi.2019.01.032] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 01/22/2019] [Accepted: 01/26/2019] [Indexed: 01/31/2023]
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8
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Patten DA, Shetty S. More Than Just a Removal Service: Scavenger Receptors in Leukocyte Trafficking. Front Immunol 2018; 9:2904. [PMID: 30631321 PMCID: PMC6315190 DOI: 10.3389/fimmu.2018.02904] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 11/27/2018] [Indexed: 12/15/2022] Open
Abstract
Scavenger receptors are a highly diverse superfamily of proteins which are grouped by their inherent ability to bind and internalize a wide array of structurally diverse ligands which can be either endogenous or exogenous in nature. Consequently, scavenger receptors are known to play important roles in host homeostasis, with common endogenous ligands including apoptotic cells, and modified low density lipoproteins (LDLs); additionally, scavenger receptors are key regulators of inflammatory diseases, such as atherosclerosis. Also, as a consequence of their affinity for a wide range of microbial products, their role in innate immunity is also being increasingly studied. However, in this review, a secondary function of a number of endothelial-expressed scavenger receptors is discussed. There is increasing evidence that some endothelial-expressed scavenger receptors are able to directly bind leukocyte-expressed ligands and subsequently act as adhesion molecules in the trafficking of leukocytes in lymphatic and vascular tissues. Here, we cover the current literature on this alternative role for endothelial-expressed scavenger receptors and also speculate on their therapeutic potential.
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Affiliation(s)
- Daniel A Patten
- National Institute for Health Research Birmingham Liver Biomedical Research Unit and Centre for Liver and Gastrointestinal Research, Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom
| | - Shishir Shetty
- National Institute for Health Research Birmingham Liver Biomedical Research Unit and Centre for Liver and Gastrointestinal Research, Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom
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9
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PRR Function of Innate Immune Receptors in Recognition of Bacteria or Bacterial Ligands. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1112:255-280. [DOI: 10.1007/978-981-13-3065-0_18] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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10
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The Roles of CXCL16 and CXCR6 in Liver Inflammation and Fibrosis. CURRENT PATHOBIOLOGY REPORTS 2015. [DOI: 10.1007/s40139-015-0090-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Zou J, Redmond AK, Qi Z, Dooley H, Secombes CJ. The CXC chemokine receptors of fish: Insights into CXCR evolution in the vertebrates. Gen Comp Endocrinol 2015; 215:117-31. [PMID: 25623148 DOI: 10.1016/j.ygcen.2015.01.004] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Revised: 01/12/2015] [Accepted: 01/13/2015] [Indexed: 12/15/2022]
Abstract
This article will review current knowledge on CXCR in fish, that represent three distinct vertebrate groups: Agnatha (jawless fishes), Chondrichthyes (cartilaginous fishes) and Osteichthyes (bony fishes). With the sequencing of many fish genomes, information on CXCR in these species in particular has expanded considerably. In mammals, 6 CXCRs have been described, and their homologues will be initially reviewed before considering a number of atypical CXCRs and a discussion of CXCR evolution.
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Affiliation(s)
- Jun Zou
- Scottish Fish Immunology Research Centre, University of Aberdeen, Aberdeen AB24 2TZ, UK; School of Biological Sciences, University of Aberdeen, Aberdeen AB24 2TZ, UK.
| | - Anthony K Redmond
- School of Biological Sciences, University of Aberdeen, Aberdeen AB24 2TZ, UK; Centre for Genome-Enabled Biology and Medicine, University of Aberdeen, Aberdeen AB24 2TZ, UK
| | - Zhitao Qi
- Scottish Fish Immunology Research Centre, University of Aberdeen, Aberdeen AB24 2TZ, UK; Key Laboratory of Aquaculture and Ecology of Coastal Pools of Jiangsu Province, Department of Ocean Technology, Yancheng Institute of Technology, Yancheng, Jiangsu 224051, China
| | - Helen Dooley
- School of Biological Sciences, University of Aberdeen, Aberdeen AB24 2TZ, UK
| | - Chris J Secombes
- Scottish Fish Immunology Research Centre, University of Aberdeen, Aberdeen AB24 2TZ, UK; School of Biological Sciences, University of Aberdeen, Aberdeen AB24 2TZ, UK
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Hepatocellular proliferation correlates with inflammatory cell and cytokine changes in a murine model of nonalchoholic fatty liver disease. PLoS One 2013; 8:e73054. [PMID: 24039859 PMCID: PMC3767686 DOI: 10.1371/journal.pone.0073054] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Accepted: 07/17/2013] [Indexed: 12/11/2022] Open
Abstract
Nonalchoholic fatty liver disease (NAFLD) is a problem of increasing prevalence and clinical significance worldwide and is associated with increased risk of development of end stage liver disease and cirrhosis, and can be complicated by hepatocellular carcinoma (HCC). NAFLD is characterized by physical and molecular changes in the liver microenvironment which include an influx of inflammatory cell populations, fibrosis, changes in gene expression, and cytokine production. To better understand changes to the liver in the setting of steatosis, we used a murine model of diet induced hepatic steatosis and corroborated our results with human patient samples of NAFLD. Among the cellular changes, we identified a significant increase in hepatocellular proliferation in the setting of steatosis as compared to controls. Analysis of inflammatory cell populations revealed increased infiltration of CD11b positive myeloid and CD3 positive lymphocytic cell populations in steatotic livers compared to normal livers. Resident Kupffer cells of the liver comprise the largest percentage of these myeloid cells and appear to be responsible for important cytokine alterations impacting proliferation of cells in the liver microenvironment. Significant alterations in cytokine profiles in the plasma and liver tissue lysates from normal and steatotic mice were detected including leptin, CXCL1, CXCL2, and CXCL16 that were further shown to directly increase hepatocyte proliferation in vitro. This increased hepatocellular proliferation and turnover in the setting of steatosis may play important roles in the progression and complications of NAFLD.
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Hammad MA, Abdel-Bakky MS, Walker LA, Ashfaq MK. Oxidized low-density lipoprotein and tissue factor are involved in monocrotaline/lipopolysaccharide-induced hepatotoxicity. Arch Toxicol 2011; 85:1079-89. [PMID: 21279329 DOI: 10.1007/s00204-011-0649-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2010] [Accepted: 01/11/2011] [Indexed: 02/05/2023]
Abstract
These studies were aimed at characterizing an animal model of inflammation-induced hepatotoxicity that would mimic features of idiosyncratic liver toxicity observed in humans. An attempt was made to identify oxidative damage and the involvement of coagulation system in liver after monocrotaline (MCT) administration under the modest inflammatory condition induced by lipopolysaccharide (LPS) exposure. Mice were given MCT (200 mg/kg) or an equivalent volume of sterile saline (Veh.) po followed 4 h later by ip injection of LPS (6 mg/kg) or vehicle. Mice co-treated with MCT and LPS showed increased plasma alanine aminotransferase (ALT), decrease in platelet number, and a reduction in hematocrit. Accumulation of oxidized low-density lipoprotein (ox-LDL) was remarkably higher in the liver sections of mice co-treated with MCT and LPS compared to those given MCT or LPS alone. A similar trend was observed in the expression of CXCL16 receptor in the same liver sections. Elevated expression of tissue factor (TF) and fibrinogen was also observed in the liver sections of MCT/LPS co-treated mice. The in vitro results showed that incubation of HepG2 cells with CXCL16 antibody strongly diminished uptake of ox-LDL. Expression of ox-LDL, CXCL16, and TF represents an early event in the onset of hepatotoxicity induced by MCT/LPS; thus, it may contribute to our understanding of idiosyncratic liver injury and points to potential targets for protection or intervention.
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Affiliation(s)
- Mohamed A Hammad
- Department of Pharmacology, School of Pharmacy, University of Mississippi, University, MS 38677, USA
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Galzi JL, Hachet-Haas M, Bonnet D, Daubeuf F, Lecat S, Hibert M, Haiech J, Frossard N. Neutralizing endogenous chemokines with small molecules. Principles and potential therapeutic applications. Pharmacol Ther 2010; 126:39-55. [PMID: 20117133 PMCID: PMC7112609 DOI: 10.1016/j.pharmthera.2009.12.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2009] [Accepted: 12/24/2009] [Indexed: 02/08/2023]
Abstract
Regulation of cellular responses to external stimuli such as hormones, neurotransmitters, or cytokines is achieved through the control of all steps of the complex cascade starting with synthesis, going through maturation steps, release, distribution, degradation and/or uptake of the signalling molecule interacting with the target protein. One possible way of regulation, referred to as scavenging or neutralization of the ligand, has been increasingly studied, especially for small protein ligands. It shows innovative potential in chemical biology approaches as well as in disease treatment. Neutralization of protein ligands, as for example cytokines or chemokines can lead to the validation of signalling pathways under physiological or pathophysiological conditions, and in certain cases, to the development of therapeutic molecules now used in autoimmune diseases, chronic inflammation and cancer treatment. This review explores the field of ligand neutralization and tries to determine to what extent small chemical molecules could substitute for neutralizing antibodies in therapeutic approaches.
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Affiliation(s)
- Jean-Luc Galzi
- IREBS, FRE3211, Ecole Supérieure de Biotechnologie de Strasbourg, Boulevard Sébastien Brant, 67412 Illkirch, France.
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Darash-Yahana M, Gillespie JW, Hewitt SM, Chen YYK, Maeda S, Stein I, Singh SP, Bedolla RB, Peled A, Troyer DA, Pikarsky E, Karin M, Farber JM. The chemokine CXCL16 and its receptor, CXCR6, as markers and promoters of inflammation-associated cancers. PLoS One 2009; 4:e6695. [PMID: 19690611 PMCID: PMC2723911 DOI: 10.1371/journal.pone.0006695] [Citation(s) in RCA: 102] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2009] [Accepted: 07/21/2009] [Indexed: 12/11/2022] Open
Abstract
Clinical observations and mouse models have suggested that inflammation can be pro-tumorigenic. Since chemokines are critical in leukocyte trafficking, we hypothesized that chemokines play essential roles in inflammation-associated cancers. Screening for 37 chemokines in prostate cancer cell lines and xenografts revealed CXCL16, the ligand for the receptor CXCR6, as the most consistently expressed chemokine. Immunohistochemistry and/or immunofluorescence and confocal imaging of 121 human prostate specimens showed that CXCL16 and CXCR6 were co-expressed, both on prostate cancer cells and adjacent T cells. Expression levels of CXCL16 and CXCR6 on cancer cells correlated with poor prognostic features including high-stage and high-grade, and expression also correlated with post-inflammatory changes in the cancer stroma as revealed by loss of alpha-smooth muscle actin. Moreover, CXCL16 enhanced the growth of CXCR6-expressing cancer and primary CD4 T cells. We studied expression of CXCL16 in an additional 461 specimens covering 12 tumor types, and found that CXCL16 was expressed in multiple human cancers associated with inflammation. Our study is the first to describe the expression of CXCL16/CXCR6 on both cancer cells and adjacent T cells in humans, and to demonstrate correlations between CXCL16 and CXCR6 vs. poor both prognostic features and reactive changes in cancer stoma. Taken together, our data suggest that CXCL16 and CXCR6 may mark cancers arising in an inflammatory milieu and mediate pro-tumorigenic effects of inflammation through direct effects on cancer cell growth and by inducing the migration and proliferation of tumor-associated leukocytes.
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Affiliation(s)
- Merav Darash-Yahana
- Laboratory of Molecular Immunology, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, Maryland, United States of America
- Hadassah-Hebrew University Medical Center, Jerusalem, Israel
- * E-mail: (MDY); (JMF)
| | - John W. Gillespie
- SAIC Frederick, National Cancer Institute at Frederick, Frederick, Maryland, United States of America
| | - Stephen M. Hewitt
- Tissue Array Research Program, Laboratory of Pathology, Center for Cancer Research (CCR), National Cancer Institute (NCI), National Institutes of Health (NIH), Bethesda, Maryland, United States of America
| | - Yun-Yun K. Chen
- Laboratory of Molecular Immunology, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, Maryland, United States of America
| | - Shin Maeda
- Institute for Adult Diseases, Asahi Life Foundation, Tokyo, Japan
| | - Ilan Stein
- Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Satya P. Singh
- Laboratory of Molecular Immunology, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, Maryland, United States of America
| | - Roble B. Bedolla
- Department of Pathology, University of Texas Health Science Center at San Antonio, San Antonio, Texas, United States of America
| | - Amnon Peled
- Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Dean A. Troyer
- Department of Pathology, University of Texas Health Science Center at San Antonio, San Antonio, Texas, United States of America
| | - Eli Pikarsky
- Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Michael Karin
- University of California San Diego, San Diego, California, United States of America
| | - Joshua M. Farber
- Laboratory of Molecular Immunology, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, Maryland, United States of America
- * E-mail: (MDY); (JMF)
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Hettne KM, Weeber M, Laine ML, ten Cate H, Boyer S, Kors JA, Loos BG. Automatic mining of the literature to generate new hypotheses for the possible link between periodontitis and atherosclerosis: lipopolysaccharide as a case study. J Clin Periodontol 2008; 34:1016-24. [PMID: 18028194 DOI: 10.1111/j.1600-051x.2007.01152.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
AIM The aim of the current report was to generate and explore new hypotheses into how, in a pathophysiological sense, atherosclerosis and periodontitis could be linked. MATERIAL AND METHODS Two different biomedical informatics techniques were used: an association-based technique that generated a ranked list of genes associated with the diseases, and a natural language processing tool that extracted the relationships between the retrieved genes and lipopolysaccharide (LPS). RESULTS This combined approach of association-based and natural language processing-based literature mining identified a hit list of 16 candidate genes, with PON1 as the primary candidate. CONCLUSIONS Further study of the literature prompted the hypothesis that PON1 might connect periodontitis with atherosclerosis in both an LPS-dependent and a non-LPS-dependent manner. Furthermore, the resulting genes not only confirmed already known associations between the two diseases, but also provided genes or gene products that have only been investigated separately in the two disease states, and genes or gene products previously reported to be involved in atherosclerosis. These findings remain to be investigated through clinical studies. This example of multidisciplinary research illustrates how collaborative efforts of investigators from different fields of expertise can result in the discovery of new hypotheses.
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Patel DN, Bailey SR, Gresham JK, Schuchman DB, Shelhamer JH, Goldstein BJ, Foxwell BM, Stemerman MB, Maranchie JK, Valente AJ, Mummidi S, Chandrasekar B. TLR4-NOX4-AP-1 signaling mediates lipopolysaccharide-induced CXCR6 expression in human aortic smooth muscle cells. Biochem Biophys Res Commun 2006; 347:1113-20. [PMID: 16870145 DOI: 10.1016/j.bbrc.2006.07.015] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2006] [Accepted: 07/06/2006] [Indexed: 11/16/2022]
Abstract
CXCL16 is a transmembrane non-ELR CXC chemokine that signals via CXCR6 to induce aortic smooth muscle cell (ASMC) proliferation. While bacterial lipopolysaccharide (LPS) has been shown to stimulate CXCL16 expression in SMC, its effects on CXCR6 are not known. Here, we demonstrate that LPS upregulates CXCR6 mRNA, protein, and surface expression in human ASMC. Inhibition of TLR4 with neutralizing antibodies or specific siRNA interference blocked LPS-mediated CXCR6 expression. LPS stimulated both AP-1 (c-Fos, c-Jun) and NF-kappaB (p50 and p65) activation, but only inhibition of AP-1 attenuated LPS-induced CXCR6 expression. Using dominant negative expression vectors and siRNA interference, we demonstrate that LPS induces AP-1 activation via MyD88, TRAF6, ERK1/2, and JNK signaling pathways. Furthermore, the flavoprotein inhibitor diphenyleniodonium chloride significantly attenuated LPS-mediated AP-1-dependent CXCR6 expression, as did inhibition of NOX4 NADPH oxidase by siRNA. Finally, CXCR6 knockdown inhibited CXCL16-induced ASMC proliferation. These results demonstrate that LPS-TLR4-NOX4-AP-1 signaling can induce CXCR6 expression in ASMC, and suggest that the CXCL16-CXCR6 axis may be an important proinflammatory pathway in the pathogenesis of atherosclerosis.
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MESH Headings
- Cells, Cultured
- Humans
- Lipopolysaccharide Receptors/pharmacology
- Lipopolysaccharides/pharmacology
- Muscle, Smooth, Vascular/cytology
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/metabolism
- NADPH Oxidase 4
- NADPH Oxidases/physiology
- Polymyxin B/pharmacology
- RNA Interference
- Receptors, CXCR6
- Receptors, Chemokine/biosynthesis
- Receptors, Virus/biosynthesis
- Signal Transduction/physiology
- Toll-Like Receptor 4/physiology
- Transcription Factor AP-1/physiology
- Up-Regulation
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Affiliation(s)
- Devang N Patel
- Department of Veterans Affairs South Texas Veterans Health Care System, San Antonio, TX, USA
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