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Shi J, Li Q, Li J, Zhou J, Zhang X, Wang S, Guo L. Single-Cell RNA Sequencing Reveals the Spatial Heterogeneity and Functional Alteration of Endothelial Cells in Chronic Hepatitis B Infection. Int J Mol Sci 2024; 25:7016. [PMID: 39000126 PMCID: PMC11241719 DOI: 10.3390/ijms25137016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Revised: 06/24/2024] [Accepted: 06/24/2024] [Indexed: 07/16/2024] Open
Abstract
Chronic Hepatitis B virus (CHB) infection is a global health challenge, causing damage ranging from hepatitis to cirrhosis and hepatocellular carcinoma. In our study, single-cell RNA sequencing (scRNA-seq) analysis was performed in livers from mice models with chronic inflammation induced by CHB infection and we found that endothelial cells (ECs) exhibited the largest number of differentially expressed genes (DEGs) among all ten cell types. NF-κB signaling was activated in ECs to induce cell dysfunction and subsequent hepatic inflammation, which might be mediated by the interaction of macrophage-derived and cholangiocyte-derived VISFATIN/Nampt signaling. Moreover, we divided ECs into three subclusters, including periportal ECs (EC_Z1), midzonal ECs (EC_Z2), and pericentral ECs (EC_Z3) according to hepatic zonation. Functional analysis suggested that pericentral ECs and midzonal ECs, instead of periportal ECs, were more vulnerable to HBV infection, as the VISFATIN/Nampt- NF-κB axis was mainly altered in these two subpopulations. Interestingly, pericentral ECs showed increasing communication with macrophages and cholangiocytes via the Nampt-Insr and Nampt-Itga5/Itgb1 axis upon CHB infection, which contribute to angiogenesis and vascular capillarization. Additionally, ECs, especially pericentral ECs, showed a close connection with nature killer (NK) cells and T cells via the Cxcl6-Cxcr6 axis, which is involved in shaping the microenvironment in CHB mice livers. Thus, our study described the heterogeneity and functional alterations of three subclusters in ECs. We revealed the potential role of VISFATIN/Nampt signaling in modulating ECs characteristics and related hepatic inflammation, and EC-derived chemokine Cxcl16 in shaping NK and T cell recruitment, providing key insights into the multifunctionality of ECs in CHB-associated pathologies.
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Affiliation(s)
- Jingqi Shi
- Bioinformatics Center of AMMS, Beijing 100039, China
| | - Qingyu Li
- Bioinformatics Center of AMMS, Beijing 100039, China
| | - Jian Li
- Bioinformatics Center of AMMS, Beijing 100039, China
| | - Jianglin Zhou
- Bioinformatics Center of AMMS, Beijing 100039, China
| | | | - Shengqi Wang
- Bioinformatics Center of AMMS, Beijing 100039, China
| | - Liang Guo
- Bioinformatics Center of AMMS, Beijing 100039, China
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2
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Rzymski P, Zarębska-Michaluk D, Flisiak R. Could chronic HBV infection explain Beethoven's hearing loss? Implications for patients currently living with hepatitis B. J Infect 2023; 87:171-176. [PMID: 37302659 DOI: 10.1016/j.jinf.2023.06.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 06/01/2023] [Accepted: 06/06/2023] [Indexed: 06/13/2023]
Abstract
The cause of Ludwig van Beethoven's health deterioration, i.e., hearing loss and cirrhosis, have been subject to various studies. The genomic analysis of his hair indicates infection with the hepatitis B virus (HBV) at least 6 months prior to death. However, considering his first documented case of jaundice in the summer of 1821, second jaundice months prior to his death, and increased risk of hearing loss in HBV-infected patients, we offer an alternative hypothesis of chronic HBV infection as a cause of deafness and cirrhosis. According to it, HBV was acquired early, progressed from immune-tolerant to an immune-reactive phase, and triggered Beethoven's hearing issues when aged 28. Later, HBV infection entered the non-replication phase with at least two episodes of reactivation in the fifth decade of life accompanied by jaundice. More studies examining hearing loss in patients with chronic HBV infection are encouraged to better understand their potential otologic needs.
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Affiliation(s)
- Piotr Rzymski
- Department of Environmental Medicine, Poznan University of Medical Sciences, 60-806 Poznań, Poland.
| | - Dorota Zarębska-Michaluk
- Department of Infectious Diseases and Allergology, Jan Kochanowski University, 25-317 Kielce, Poland
| | - Robert Flisiak
- Department of Infectious Diseases and Hepatology, Medical University of Białystok, 15-540 Białystok, Poland
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3
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Lan W, Wang Y, Zhou Z, Sun X, Zhang Y, Zhang F. Metabolic Regulation of Hepatitis B Virus Infection in HBV-Transgenic Mice. Metabolites 2022; 12:287. [PMID: 35448475 PMCID: PMC9031567 DOI: 10.3390/metabo12040287] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 03/17/2022] [Accepted: 03/23/2022] [Indexed: 11/20/2022] Open
Abstract
Hepatitis B virus (HBV) infection is a worldwide health burden. Metabolomics analysis has revealed HBV-induced metabolism dysregulation in liver tissues and hepatocytes. However, as an infectious disease, the tissue-specific landscape of metabolic profiles of HBV infection remains unclear. To fill this gap, we applied untargeted nuclear magnetic resonance (NMR) metabolomic analysis of the heart, liver, spleen, lung, kidney, pancreas, and intestine (duodenum, jejunum, ileum) in HBV-transgenic mice and their wild-type littermates. Strikingly, we found systemic metabolic alterations induced by HBV in liver and extrahepatic organs. Significant changes in metabolites have been observed in most tissues of HBV-transgenic mice, except for ileum. The metabolic changes may provide novel therapeutic targets for the treatment of HBV infection. Moreover, tissue-specific metabolic profiles could speed up the study of HBV induced systemic metabolic reprogramming, which could help follow the progression of HBV infection and explain the underlying pathogenesis.
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Affiliation(s)
- Wenning Lan
- Key Laboratory of Gastrointestinal Cancer, Ministry of Education, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China;
- Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Sciences, Xiamen 361021, China
- Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou 341001, China
| | - Yang Wang
- Institute of Immunotherapy, Fujian Medical University, Fuzhou 350122, China;
| | - Zixiong Zhou
- Department of Pathology, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China;
| | - Xia Sun
- Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350108, China;
| | - Yun Zhang
- Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Sciences, Xiamen 361021, China
- Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350108, China;
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
| | - Fangrong Zhang
- Key Laboratory of Gastrointestinal Cancer, Ministry of Education, School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China;
- Fujian Key Laboratory of Tumor Microbiology, Department of Medical Microbiology, Fujian Medical University, Fuzhou 350122, China
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4
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Transaminase Elevations during Treatment of Chronic Hepatitis B Infection: Safety Considerations and Role in Achieving Functional Cure. Viruses 2021; 13:v13050745. [PMID: 33922828 PMCID: PMC8146791 DOI: 10.3390/v13050745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 04/20/2021] [Accepted: 04/22/2021] [Indexed: 11/17/2022] Open
Abstract
While current therapies for chronic HBV infection work well to control viremia and stop the progression of liver disease, the preferred outcome of therapy is the restoration of immune control of HBV infection, allowing therapy to be removed while maintaining effective suppression of infection and reversal of liver damage. This “functional cure” of chronic HBV infection is characterized by the absence of detectable viremia (HBV DNA) and antigenemia (HBsAg) and normal liver function and is the goal of new therapies in development. Functional cure requires removal of the ability of infected cells in the liver to produce the hepatitis B surface antigen. The increased observation of transaminase elevations with new therapies makes understanding the safety and therapeutic impact of these flares an increasingly important issue. This review examines the factors driving the appearance of transaminase elevations during therapy of chronic HBV infection and the interplay of these factors in assessing the safety and beneficial nature of these flares.
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Yang Z, Wang J, Zhang D, Wang S, Wang R, Zhao J. Hepatitis B virus infected patients show increased risk of cerebral aneurysm rupture: A retrospective analysis. J Clin Neurosci 2019; 63:155-159. [PMID: 30850179 DOI: 10.1016/j.jocn.2019.01.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 01/18/2019] [Indexed: 12/25/2022]
Abstract
BACKGROUND The mechanism responsible for cerebral aneurysm (CA) formation and rupture remains unclear. Some studies showed vascular involvement could be observed in systemic vasculitis caused by Hepatitis B. Therefore, it is necessary to determine the possibility by which hepatitis B virus (HBV) infection might be associated with CA. METHODS AND RESULTS We retrospectively studied patient details and serological markers of HBV infection among 229 patients presenting with CA on admission to the Neurosurgery Department at Beijing Tiantan Hospital between March 2016 and February 2017. Clinical data, radiologic findings and clinical features of HBV infection were analyzed by SPSS. The results showed a significant association between HBsAg positive (p = 0.014), anti-HBc positive (p = 0.045) and CA rupture. Univariate analysis revealed patients that were HBsAg positive (OR: 4.828; 95% CI: 1.363-17.099; p = 0.015) and anti-HBc positive (OR: 1.804; 95% CI: 1.010-3.223; p = 0.046) were associated with CA rupture. Compared with other confounding risk factors for rupture in the statistical analysis, HBsAg positive status (OR: 4.085; 95% CI: 1.011-16.513; p = 0.048) remained positively associated with CA rupture. CONCLUSIONS Observation showed that HBsAg positivity was associated with CA rupture.
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Affiliation(s)
- Ziwen Yang
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, PR China; China National Clinical Research Center for Neurological Diseases, Beijing, PR China; Center of Stroke, Beijing Institute for Brain Disorders, Beijing, PR China; Beijing Key Laboratory of Translational Medicine for Cerebrovascular Disease, Beijing, PR China
| | - Jia Wang
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, PR China; China National Clinical Research Center for Neurological Diseases, Beijing, PR China; Center of Stroke, Beijing Institute for Brain Disorders, Beijing, PR China; Beijing Key Laboratory of Translational Medicine for Cerebrovascular Disease, Beijing, PR China
| | - Dong Zhang
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, PR China; China National Clinical Research Center for Neurological Diseases, Beijing, PR China; Center of Stroke, Beijing Institute for Brain Disorders, Beijing, PR China; Beijing Key Laboratory of Translational Medicine for Cerebrovascular Disease, Beijing, PR China
| | - Shuo Wang
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, PR China; China National Clinical Research Center for Neurological Diseases, Beijing, PR China; Center of Stroke, Beijing Institute for Brain Disorders, Beijing, PR China; Beijing Key Laboratory of Translational Medicine for Cerebrovascular Disease, Beijing, PR China
| | - Rong Wang
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, PR China; China National Clinical Research Center for Neurological Diseases, Beijing, PR China; Center of Stroke, Beijing Institute for Brain Disorders, Beijing, PR China; Beijing Key Laboratory of Translational Medicine for Cerebrovascular Disease, Beijing, PR China
| | - Jizong Zhao
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, PR China; China National Clinical Research Center for Neurological Diseases, Beijing, PR China; Center of Stroke, Beijing Institute for Brain Disorders, Beijing, PR China; Beijing Key Laboratory of Translational Medicine for Cerebrovascular Disease, Beijing, PR China.
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6
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Tse G, Yeo JM, Chan YW, Lai ETHL, Yan BP. What Is the Arrhythmic Substrate in Viral Myocarditis? Insights from Clinical and Animal Studies. Front Physiol 2016; 7:308. [PMID: 27493633 PMCID: PMC4954848 DOI: 10.3389/fphys.2016.00308] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Accepted: 07/06/2016] [Indexed: 01/25/2023] Open
Abstract
Sudden cardiac death (SCD) remains an unsolved problem in the twenty-first century. It is often due to rapid onset, ventricular arrhythmias caused by a number of different clinical conditions. A proportion of SCD patients have identifiable diseases such as cardiomyopathies, but for others, the causes are unknown. Viral myocarditis is becoming increasingly recognized as a contributor to unexplained mortality, and is thought to be a major cause of SCD in the first two decades of life. Myocardial inflammation, ion channel dysfunction, electrophysiological, and structural remodeling may play important roles in generating life-threatening arrhythmias. The aim of this review article is to examine the electrophysiology of action potential conduction and repolarization and the mechanisms by which their derangements lead to triggered and reentrant arrhythmogenesis. By synthesizing experimental evidence from pre-clinical and clinical studies, a framework of how host (inflammation), and viral (altered cellular signaling) factors can induce ion electrophysiological and structural remodeling is illustrated. Current pharmacological options are mainly supportive, which may be accompanied by mechanical circulatory support. Heart transplantation is the only curative option in the worst case scenario. Future strategies for the management of viral myocarditis are discussed.
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Affiliation(s)
- Gary Tse
- Li Ka Shing Faculty of Medicine, School of Biomedical Sciences, University of Hong KongHong Kong, China
- Department of Medicine and Therapeutics, The Chinese University of Hong KongHong Kong, China
| | - Jie M. Yeo
- Faculty of Medicine, Imperial College LondonLondon, UK
| | - Yin Wah Chan
- Department of Psychology, School of Biological Sciences, University of CambridgeCambridge, UK
| | - Eric T. H. Lai Lai
- Li Ka Shing Faculty of Medicine, School of Biomedical Sciences, University of Hong KongHong Kong, China
| | - Bryan P. Yan
- Department of Medicine and Therapeutics, The Chinese University of Hong KongHong Kong, China
- Department of Epidemiology and Preventive Medicine, Monash UniversityMelbourne, VIC, Australia
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7
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Huang Y, Yan Q, Fan R, Song S, Ren H, Li Y, Lan Y. Hepatitis B Virus Replication in CD34+ Hematopoietic Stem Cells From Umbilical Cord Blood. Med Sci Monit 2016; 22:1673-81. [PMID: 27188537 PMCID: PMC4918530 DOI: 10.12659/msm.898680] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Hepatitis B virus (HBV) is a hepatotropic virus that can infect extrahepatic tissue. Whether hematopoietic stem cells (HSCs) can be infected by HBV and serve as a potential virus reservoir is still unknown. In this study, the susceptibility of CD34+ HSCs to HBV was investigated. MATERIAL AND METHODS Cord blood-derived CD34+ HSCs were exposed to HBV in vitro, and immunocytochemistry, transmission electron microscopy, and RT-PCR were used to identify viral-related proteins and specific viral genomic sequences. Then, CD34+ HSCs were challenged by different titers of HBV, and intracellular and supernatant HBV DNA, and hepatitis B surface antigen (HBsAg) levels, were examined. In addition, CD34+ peripheral blood stem cells (PBSCs) from chronic HBV carriers were isolated and cultured, and HBV DNA levels were measured. RESULTS HBV-infected CD34+ cells showed positive signals for HBsAg by DAB staining and TRITC staining, and HBV particles were identified. RT-PCR results showed that the 403 bp PCR products corresponding to the amplified hepatitis B S gene fragment were observed in CD34+ HSCs infected by HBV. In addition, supernatant and intracellular HBV DNA increased with the proliferation of CD34+ HSCs. Similar results were obtained from intracellular HBsAg quantification tests. In addition, HBV DNA levels both in cells and in supernatants of CD34+ PBSCs increased proportionally, and the increments of HBV DNA in the supernatants paralleled those found in cells. CONCLUSIONS HBV can replicate in CD34+ HSCs in cord blood or peripheral blood of chronic HBV carriers.
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Affiliation(s)
- Yanxin Huang
- Department of Infectious Disease, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China (mainland)
| | - Qin Yan
- Department of Infectious Disease, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China (mainland)
| | - Rongshan Fan
- Department of Infectious Disease, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China (mainland)
| | - Shupeng Song
- Department of Infectious Disease, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China (mainland)
| | - Hong Ren
- Department of Infectious Disease, Institute for Viral Hepatitis, Key Laboratory of Molecular Biology for Infectious Disease, Ministry of Education, Second Affiliated Hospital of Chongqing Medical University, Chongqing, China (mainland)
| | - Yongguo Li
- Department of Infectious Disease, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China (mainland)
| | - Yinghua Lan
- Department of Infectious Disease, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China (mainland)
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8
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Hepatitis B virus replication is upregulated in proliferated peripheral blood lymphocytes. Mol Med Rep 2016; 13:3581-7. [PMID: 26936285 DOI: 10.3892/mmr.2016.4973] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Accepted: 01/26/2016] [Indexed: 01/19/2023] Open
Abstract
Increasing evidence indicates that the hepatitis B virus (HBV) replicates in peripheral blood mononuclear cells (PBMCs), but at a low level. The present study aimed to establish a reliable and sensitive method that effectively detects HBV viral products for monitoring antiviral therapy, organ transplantation screening, and diagnosing occult HBV infection. In the present study, PBMCs (obtained from six healthy volunteers) were inoculated with HBV, and cultured with phytohemagglutinin (PHA) and interleukin‑2 (IL‑2) to stimulate cell proliferation. PBMCs were harvested, and quantitative detection of HBV DNA in cell suspension and intracellular hepatitis B surface antigen (HBsAg) was conducted on days 0, 1, 6 and 12, respectively. In situ hybridization, immunohistochemistry and reverse transcription‑polymerase chain reaction (RT‑PCR) were performed to analyze the HBV infection. The results demonstrated that HBV DNA increased concurrently with proliferation of PBMCs isolated from three of six healthy volunteers, and the mean number of PBMCs on day 12 was 13.61 times higher than the initially seeded cell number (P<0.01). The mean copies of HBV DNA at day 12 were 2.98 times higher compared with initial levels (P<0.05). Furthermore, intracellular HBsAg levels increased concurrently with proliferation of PBMCs in one group of cultured PBMCs, which was accompanied by increased HBV DNA levels. In addition, HBV nucleic acids were detected in PBMCs using in situ hybridization. Intracellular HBsAg was observed in PBMCs and HBV RNA was also detected by RT‑PCR. The present study demonstrated that HBV replicates in proliferating PBMCs, which were induced by PHA and IL‑2. This method offers a novel investigative tool to detect HBV infection in PBMCs and to monitor the course of HBV infection.
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Datta S. Compartmentalization of hepatitis B virus: Looking beyond the liver. World J Hepatol 2015; 7:2241-2244. [PMID: 26380649 PMCID: PMC4568485 DOI: 10.4254/wjh.v7.i20.2241] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Revised: 07/06/2015] [Accepted: 08/03/2015] [Indexed: 02/06/2023] Open
Abstract
Hepatitis B virus (HBV) is classically considered to be hepatotropic, but accumulating evidences strongly support its extra-hepatotropic nature too. HBV nucleic acids and proteins have long been reported in a variety of extra-hepatic tissues. Of these, HBV has been studied in details in the peripheral blood mononuclear cells (PBMCs), due to its accessibility. From these studies, it is now well established that PBMCs are permissive to HBV infection, replication, transcription and production of infective virions. Furthermore, molecular evolutionary studies have provided definite evidences towards evolution of HBV genome in PBMCs, which is independent of evolution occurring in the liver, leading to the emergence and selection of compartment specific escape variants or drug resistant strains. These variants/resistant strains of HBV remain restricted within the PBMCs and are rarely detected in the serum/plasma. In addition, HBV infected PBMCs have been reported to be directly transmitted through intrauterine modes, and this infection does not correlate significantly with serum HBV surface antigen or HBV DNA markers. This editorial briefly reviews the current knowledge on this topic, emphasizes and delineates the gaps that are required to be filled to properly understand the biological and clinical relevance of extrahepatic tropism of HBV.
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10
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Mozos I. Arrhythmia risk in liver cirrhosis. World J Hepatol 2015; 7:662-672. [PMID: 25866603 PMCID: PMC4388994 DOI: 10.4254/wjh.v7.i4.662] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2014] [Revised: 12/04/2014] [Accepted: 01/19/2015] [Indexed: 02/06/2023] Open
Abstract
Interactions between the functioning of the heart and the liver have been described, with heart diseases affecting the liver, liver diseases affecting the heart, and conditions that simultaneously affect both. The heart is one of the most adversely affected organs in patients with liver cirrhosis. For example, arrhythmias and electrocardiographic changes are observed in patients with liver cirrhosis. The risk for arrhythmia is influenced by factors such as cirrhotic cardiomyopathy, cardiac ion channel remodeling, electrolyte imbalances, impaired autonomic function, hepatorenal syndrome, metabolic abnormalities, advanced age, inflammatory syndrome, stressful events, impaired drug metabolism and comorbidities. Close monitoring of cirrhotic patients is needed for arrhythmias, particularly when QT interval-prolonging drugs are given, or if electrolyte imbalances or hepatorenal syndrome appear. Arrhythmia risk may persist after liver transplantation due to possible QT interval prolongation, persistence of the parasympathetic impairment, post-transplant reperfusion and chronic immunosuppression, as well as consideration of the fact that the transplant itself is a stressful event for the cardiovascular system. The aims of the present article were to provide a review of the most important data regarding the epidemiology, pathophysiology, and biomarkers of arrhythmia risk in patients with liver cirrhosis, to elucidate the association with long-term outcome, and to propose future research directions.
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Schmidt-Lucke C, Zobel T, Schrepfer S, Kuhl U, Wang D, Klingel K, Becher PM, Fechner H, Pozzuto T, Van Linthout S, Lassner D, Spillmann F, Escher F, Holinski S, Volk HD, Schultheiss HP, Tschope C. Impaired Endothelial Regeneration Through Human Parvovirus B19-Infected Circulating Angiogenic Cells in Patients With Cardiomyopathy. J Infect Dis 2015; 212:1070-81. [PMID: 25805750 DOI: 10.1093/infdis/jiv178] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Accepted: 02/26/2015] [Indexed: 11/13/2022] Open
Abstract
Human parvovirus B19 (B19V) is a common pathogen in microvascular disease and cardiomyopathy, owing to infection of endothelial cells. B19V replication, however, is almost restricted to erythroid progenitor cells (ErPCs). Endothelial regeneration attributable to bone marrow-derived circulating angiogenic cells (CACs) is a prerequisite for organ function. Because of many similarities of ErPCs and CACs, we hypothesized that B19V is a perpetrator of impaired endogenous endothelial regeneration. B19V DNA and messenger RNA from endomyocardial biopsy specimens, bone marrow specimens, and circulating progenitor cells were quantified by polymerase chain reaction analysis. The highest B19V DNA concentrations were found in CD34(+)KDR(+) cells from 17 patients with chronic B19V-associated cardiomyopathy. B19V replication intermediates could be detected in nearly half of the patients. Furthermore, chronic B19V infection was associated with impaired endothelial regenerative capacity. B19V infection of CACs in vitro resulted in expression of transcripts encoding B19V proteins. The capsid protein VP1 was identified as a novel inducer of apoptosis, as were nonstructural proteins. Inhibition studies identified so-called death receptor signaling with activation of caspase-8 and caspase-10 to be responsible for apoptosis induction. B19V causally impaired endothelial regeneration with spreading of B19V in CACs in an animal model in vivo. We thus conclude that B19V infection and damage to CACs result in dysfunctional endogenous vascular repair, supporting the emergence of primary bone marrow disease with secondary end-organ damage.
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Affiliation(s)
- Caroline Schmidt-Lucke
- Department of Cardiology and Pneumology Berlin-Brandenburg Center for Regenerative Therapies Medico-Academic Consultings
| | | | - Sonja Schrepfer
- Transplant and Stem Cell Immunobiology Laboratory, University Heart Center Hamburg
| | - Uwe Kuhl
- Department of Cardiology and Pneumology
| | - Dong Wang
- Transplant and Stem Cell Immunobiology Laboratory, University Heart Center Hamburg
| | - Karin Klingel
- Department of Molecular Pathology, Institute of Pathology, Tübingen, Germany
| | | | - Henry Fechner
- Department of Cardiology and Pneumology Institute for Biotechnology, University of Technology
| | | | | | | | | | | | | | - Hans-Dieter Volk
- Institute of Medical Immunology, Charité-Universitätsmedizin Berlin-Brandenburg Center for Regenerative Therapies
| | | | - Carsten Tschope
- Department of Cardiology and Pneumology Berlin-Brandenburg Center for Regenerative Therapies Deutsches Zentrum für Herz-Kreislauf-Forschung, Berlin
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12
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Minami S, Shibata M, Matsuhashi T, Hiura M, Abe S, Harada M. Acute Liver Failure Complicated with Severe Heart Failure. Intern Med 2015; 54:2443-7. [PMID: 26424300 DOI: 10.2169/internalmedicine.54.2913] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
A young pregnant woman was hospitalized due to hepatitis B virus (HBV)-related acute liver failure (ALF). The cardiac function was normal on admission. However, she developed ALF concurrently with a coma and severe cardiac failure. The patient was diagnosed with severe acute cardiomyopathy due to diffuse hypokinesis of the left ventricle wall on ultrasound cardiography. Following intensive treatment, both the liver and cardiac function dramatically recovered. Although some factors, such as HBV, pregnancy and systemic inflammatory response syndrome, are possible causes of acute cardiomyopathy in the present case, ALF itself may be a risk factor for heart failure.
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Affiliation(s)
- Sota Minami
- The Third Department of Internal Medicine, University of Occupational and Environmental Health, School of Medicine, Japan
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Lee S, Yu KR, Ryu YS, Oh YS, Hong IS, Kim HS, Lee JY, Kim S, Seo KW, Kang KS. miR-543 and miR-590-3p regulate human mesenchymal stem cell aging via direct targeting of AIMP3/p18. AGE (DORDRECHT, NETHERLANDS) 2014; 36:9724. [PMID: 25465621 PMCID: PMC4259092 DOI: 10.1007/s11357-014-9724-2] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2014] [Accepted: 10/22/2014] [Indexed: 06/04/2023]
Abstract
Previously, AIMP3 (aminoacyl-tRNAsynthetase-interacting multifunctional protein-3) was shown to be involved in the macromolecular tRNA synthetase complex or to act as a tumor suppressor. In this study, we report a novel role of AIMP3/p18 in the cellular aging of human mesenchymal stem cells (hMSCs). We found that AIMP3/p18 expression significantly increased in senescent hMSCs and in aged mouse bone marrow-derived MSCs (mBM-MSCs). AIMP3/p18 overexpression is sufficient to induce the cellular senescence phenotypes with compromised clonogenicity and adipogenic differentiation potential. To identify the upstream regulators of AIMP3/p18 during senescence, we screened for potential epigenetic regulators and for miRNAs. We found that the levels of miR-543 and miR-590-3p significantly decreased under senescence-inducing conditions, whereas the AIMP3/p18 protein levels increased. We demonstrate for the first time that miR-543 and miR-590-3p are able to decrease AIMP3/p18 expression levels through direct binding to the AIMP/p18 transcripts, which further compromised the induction of the senescence phenotype. Taken together, our data demonstrate that AIMP3/p18 regulates cellular aging in hMSCs possibly through miR-543 and miR-590-3p.
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Affiliation(s)
- Seunghee Lee
- />Adult Stem Cell Research Center, College of Veterinary Medicine, Seoul National University, Seoul, 151-742 Republic of Korea
- />Research Institute for Veterinary Medicine, College of Veterinary Medicine, Seoul National University, Seoul, 151-742 Republic of Korea
- />Institute for Stem Cell and Regenerative Medicine in Kang Stem Biotech, Biotechnology Incubating Center, Seoul National University, Seoul, 151-742 Republic of Korea
| | - Kyung-Rok Yu
- />Adult Stem Cell Research Center, College of Veterinary Medicine, Seoul National University, Seoul, 151-742 Republic of Korea
- />Research Institute for Veterinary Medicine, College of Veterinary Medicine, Seoul National University, Seoul, 151-742 Republic of Korea
| | - Young-Sil Ryu
- />Adult Stem Cell Research Center, College of Veterinary Medicine, Seoul National University, Seoul, 151-742 Republic of Korea
- />Research Institute for Veterinary Medicine, College of Veterinary Medicine, Seoul National University, Seoul, 151-742 Republic of Korea
| | - Young Sun Oh
- />Medicinal Bioconvergence Research Center, Seoul National University, Seoul, 151-742 Republic of Korea
- />WCU Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Suwon, 443-270 Republic of Korea
| | - In-Sun Hong
- />Department of Molecular Medicine, Gachon University, Incheon, Republic of Korea
- />Lee Gil Ya Cancer and Diabetes Institute, Incheon, Republic of Korea
| | - Hyung-Sik Kim
- />Adult Stem Cell Research Center, College of Veterinary Medicine, Seoul National University, Seoul, 151-742 Republic of Korea
- />Research Institute for Veterinary Medicine, College of Veterinary Medicine, Seoul National University, Seoul, 151-742 Republic of Korea
- />Institute for Stem Cell and Regenerative Medicine in Kang Stem Biotech, Biotechnology Incubating Center, Seoul National University, Seoul, 151-742 Republic of Korea
| | - Jin Young Lee
- />Adult Stem Cell Research Center, College of Veterinary Medicine, Seoul National University, Seoul, 151-742 Republic of Korea
- />Research Institute for Veterinary Medicine, College of Veterinary Medicine, Seoul National University, Seoul, 151-742 Republic of Korea
| | - Sunghoon Kim
- />Medicinal Bioconvergence Research Center, Seoul National University, Seoul, 151-742 Republic of Korea
- />WCU Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Suwon, 443-270 Republic of Korea
| | - Kwang-Won Seo
- />Adult Stem Cell Research Center, College of Veterinary Medicine, Seoul National University, Seoul, 151-742 Republic of Korea
- />Research Institute for Veterinary Medicine, College of Veterinary Medicine, Seoul National University, Seoul, 151-742 Republic of Korea
- />Institute for Stem Cell and Regenerative Medicine in Kang Stem Biotech, Biotechnology Incubating Center, Seoul National University, Seoul, 151-742 Republic of Korea
| | - Kyung-Sun Kang
- />Adult Stem Cell Research Center, College of Veterinary Medicine, Seoul National University, Seoul, 151-742 Republic of Korea
- />Research Institute for Veterinary Medicine, College of Veterinary Medicine, Seoul National University, Seoul, 151-742 Republic of Korea
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14
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Harmancı Ö, Selçuk H, Haberal M. Prophylaxis against Recurrence in Liver Transplantation Patients with Hepatitis B Virus: What is New? J Clin Transl Hepatol 2014; 2:259-65. [PMID: 26356785 PMCID: PMC4521236 DOI: 10.14218/jcth.2014.00023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Revised: 09/17/2014] [Accepted: 09/18/2014] [Indexed: 12/18/2022] Open
Abstract
Hepatitis B virus (HBV) causes an endemic infection that affects nearly 2 billion patients worldwide. It is one of the leading causes of liver cirrhosis, hepatocellular carcinoma (HCC), and liver transplantation (LT). Recurrence of HBV infection after LT is due to specific HBV-host genome interactions. Although hepatitis B immunoglobulin treatment constituted the backbone of HBV recurrence, use of the nucleoside and nucleotide analogs (especially the ones with a higher genetic barrier to resistance), either alone or in combination, offer us new and powerful options in overcoming this serious issue.
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Affiliation(s)
- Özgür Harmancı
- Department of Gastroenterology, Başkent University Medical School, Ankara, Turkey
- Correspondence to: Özgür Harmancı, Department of Gastroenterology, Başkent University Medical School, Mareşal Fevzi çakmak Cad. No:45 Bahçelievler, 06490, Ankara, Turkey. Tel: +90-312-212-6868, Fax: +90-312-215-0835. E-mail:
| | - Haldun Selçuk
- Department of Gastroenterology, Başkent University Medical School, Ankara, Turkey
| | - Mehmet Haberal
- Department of General Surgery, Başkent University Medical School, Ankara, Turkey
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15
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Demir C, Demir M. Evaluation of Tp-e interval and Tp-e/QT ratio in patients with chronic hepatitis B. Prague Med Rep 2014; 114:239-45. [PMID: 24485341 DOI: 10.14712/23362936.2014.13] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Chronic hepatitis B (CHB) is a chronic inflammatory viral disorder. Several studies have suggested that the interval from the peak to the end of the electrocardiographic T wave (Tp-e) may correspond to the transmural dispersion of repolarisation and that increased Tp-e interval and Tp-e/QT ratio are associated with malignant ventricular arrhythmias. Impaired autonomic function has been described in patients with CHB. The aim of this study was to evaluate ventricular repolarisation by using Tp-e interval and Tp-e/QT ratio in patients with CHB, and to assess the relation with inflammation. Fifty-five patients with CHB and 50 controls were included. Tp-e interval and Tp-e/QT ratio were measured from the 12-lead electrocardiogram, and Tp-e interval corrected for heart rate. These parameters were compared between groups. In electrocardiographic parameters analysis, QT dispersion (QTd) and corrected QTd were significantly increased in CHB patients compared to the controls (38.3 ± 10.9 vs. 28.5 ± 7.3 milliseconds and 39.5 ± 11.2 vs. 29.6 ± 7.6 milliseconds, P=0.01 and P<0.001, respectively). cTp-e interval and Tp-e/QT ratio were also significantly higher in CHB patients (85.3 ± 8.2 vs. 74.5 ± 7.4 milliseconds and 0.24 ± 0.02 vs. 0.18 ± 0.02, all P-value < 0.001). Our study revealed that Tp-e interval and Tp-e/QT ratio were increased in CHB patients.
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Affiliation(s)
- C Demir
- Department of Infectious Disease, Şevket Yılmaz Education and Research Hospital, Bursa, Turkey
| | - M Demir
- Department of Cardiology, Yüksek İhtisas Education and Research Hospital, Bursa, Turkey
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16
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Maruyama S, Koda M, Murawaki Y. Myocardial perfusion defects in patients with chronic hepatitis B infection. J Gastroenterol Hepatol 2014; 29:794-9. [PMID: 24224614 DOI: 10.1111/jgh.12453] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/30/2013] [Indexed: 12/09/2022]
Abstract
BACKGROUND AND AIM The association between hepatitis B virus (HBV) infection and myocardial injury has yet to be elucidated. We sought to investigate myocardial conditions in patients with chronic HBV infection. METHODS In 47 consecutive patients with chronic hepatitis B who had no overt heart disease, we performed electrocardiography, echocardiography, serum tests for myocardial injury, and thallium-201 myocardial scintigraphy. Myocardial perfusion defects were confirmed by the severity score (SS), which was calculated as the sum of thallium-201 perfusion defect scores. The SS was followed before and after interferon (IFN) therapy in 10 patients. RESULTS Abnormal ECGs were found in 9% of patients with chronic hepatitis B. SS values in the hepatitis group were significantly higher than in the control group (P < 0.0001). Abnormal SS values were found in 47% of the chronic hepatitis B patients. Independent factors related to higher pretreatment SS were serum HBV DNA titer and IgG level. After interferon (IFN) therapy, the SS values of responders were significantly reduced (P ≤ 0.02); SS values of nonresponders were not significantly different before and after IFN therapy. SS values altered following IFN therapy, along with serum IgG concentrations. CONCLUSIONS Myocardial perfusion defects were found in 47% of the patients with chronic hepatitis B and improved along with HBV reduction with IFN administration. SS improvement was closely correlated with decreases in serum IgG levels.
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17
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Sellner J, Steiner I. Neurologic complications of hepatic viruses. HANDBOOK OF CLINICAL NEUROLOGY 2014; 123:647-61. [PMID: 25015509 DOI: 10.1016/b978-0-444-53488-0.00031-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Johann Sellner
- Department of Neurology, Christian-Doppler-Klinik, Paracelsus Medical University, Salzburg, Austria; Department of Neurology, Klinikum rechts der Isar, Technische Universität Munich, Germany
| | - Israel Steiner
- Department of Neurology, Rabin Medical Center, Petach Tikva, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.
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18
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de Niet A, de Bruijne J, Plat-Sinnige MT, Takkenberg R, van Lier R, Reesink H, van Leeuwen E. Upregulation of CXCR3 expression on CD8+ T cells due to the pervasive influence of chronic hepatitis B and C virus infection. Hum Immunol 2013; 74:899-906. [DOI: 10.1016/j.humimm.2013.04.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2012] [Revised: 03/14/2013] [Accepted: 04/10/2013] [Indexed: 11/30/2022]
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19
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Lao TT, Sahota DS, Cheng YKY, Law LW, Leung TY. Maternal hepatitis B surface antigen status and incidence of pre-eclampsia. J Viral Hepat 2013; 20:343-9. [PMID: 23565617 DOI: 10.1111/jvh.12037] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2012] [Accepted: 10/01/2012] [Indexed: 12/12/2022]
Abstract
The relationship between chronic hepatitis B virus (HBV) infection with atherosclerosis and cardiovascular disorders remains unclear, and the impact of maternal HBV infection on the development of pregnancy-induced hypertension (PIH) and pre-eclampsia (PE) is also controversial. This retrospective cohort study was conducted to examine the relationship between maternal hepatitis B surface antigen (HBsAg) status with PIH and PE in singleton pregnancies that delivered at 24 weeks of gestation and beyond. Among the 86 537 cases in the cohort, 10% were HBsAg positive, and overall 2.0% had PIH, of whom 56.3% developed PE. HBsAg-positive women had higher weight and body mass index (BMI), but lower incidences of advanced age, nulliparity, PIH (1.6% vs 2.0%, P = 0.007) and PE (0.8% vs 1.1%, P = 0.005). On multiple logistic regression analysis adjusting for the effects of nulliparity, advanced age, high BMI, and underlying renal, cardiac and autoimmune diseases, HBsAg carriage was associated with significantly reduced incidence of PIH (aOR 0.79, 95% CI 0.66-0.95) and PE (aOR 0.71, 95% CI 0.56-0.91). Our results indicate that maternal HBsAg carriage is independently associated with reduced PE. As chronic HBV infection alters the immune response of the individual, our observation could be related to enhanced maternal immunotolerance of the foetus and hence a reduction in the incidence of PE. The implications of our findings on the long-term health outcome of the infected women, from cardiovascular morbidity to malignancies, warrant further studies.
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Affiliation(s)
- T T Lao
- Department of Obstetrics & Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong SAR, China.
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20
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Demir M, Demir C. Effect of hepatitis B virus infection on right and left ventricular functions. Med Sci Monit 2013; 18:CR587-91. [PMID: 22936196 PMCID: PMC3560655 DOI: 10.12659/msm.883356] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND In this study we examined right and left ventricular systolic functions in hepatitis B virus (HBV) patients. MATERIAL/METHODS The study included 50 HBsAg-positive patients (mean age; 33±13 years) and 50 other persons (mean age; 28±11 years) as a control group. Transthoracic echocardiography was performed in all the participants. Right and left ventricle systolic parameters were compared between these 2 groups. RESULTS In the group of the patients with HBsAg positivity, the right ventricular fractional area change (RV FAC), tricuspid annular plane excursion (TAPSE) and RV myocardial systolic velocity (St) values were lower than in the control group (33±11 vs. 52±13%, p=0.001; 14.6±1.1 vs. 22.2±2.4 mm, p<0.001; 8.6±1.2 vs. 15.8±2.3 cm/s, p<0,001, respectively); the right atrium (RA) and RV diameters were higher than in controls (5.1±1.2 vs. 3.7±0.5 cm, p<0.001; 4.9±0.8 vs. 3.4±0.5 cm p<0.001, respectively); and systolic pulmonary artery pressure was higher than in control (39.3±9.5 vs. 22±8.4 mmHg, p<0.001). CONCLUSIONS The findings showed that HBV infection may be associated with right ventricular systolic dysfunction and pulmonary hypertension.
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Affiliation(s)
- Mehmet Demir
- Department of Cardiology, Bursa Yuksek Ihtisas Education and Research Hospital, Bursa, Turkey.
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So AY, Jung JW, Lee S, Kim HS, Kang KS. DNA methyltransferase controls stem cell aging by regulating BMI1 and EZH2 through microRNAs. PLoS One 2011; 6:e19503. [PMID: 21572997 PMCID: PMC3091856 DOI: 10.1371/journal.pone.0019503] [Citation(s) in RCA: 136] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2011] [Accepted: 03/30/2011] [Indexed: 12/30/2022] Open
Abstract
Epigenetic regulation of gene expression is well known mechanism that regulates cellular senescence of cancer cells. Here we show that inhibition of DNA methyltransferases (DNMTs) with 5-azacytidine (5-AzaC) or with specific small interfering RNA (siRNA) against DNMT1 and 3b induced the cellular senescence of human umbilical cord blood-derived multipotent stem cells (hUCB-MSCs) and increased p16(INK4A) and p21(CIP1/WAF1) expression. DNMT inhibition changed histone marks into the active forms and decreased the methylation of CpG islands in the p16(INK4A) and p21(CIP1/WAF1) promoter regions. Enrichment of EZH2, the key factor that methylates histone H3 lysine 9 and 27 residues, was decreased on the p16(INK4A) and p21(CIP1/WAF1) promoter regions. We found that DNMT inhibition decreased expression levels of Polycomb-group (PcG) proteins and increased expression of microRNAs (miRNAs), which target PcG proteins. Decreased CpG island methylation and increased levels of active histone marks at genomic regions encoding miRNAs were observed after 5-AzaC treatment. Taken together, DNMTs have a critical role in regulating the cellular senescence of hUCB-MSCs through controlling not only the DNA methylation status but also active/inactive histone marks at genomic regions of PcG-targeting miRNAs and p16(INK4A) and p21(CIP1/WAF1) promoter regions.
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Affiliation(s)
- Ah-Young So
- Adult Stem Cell Research Center, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
- Department of Veterinary Public Health, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
- Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
| | - Ji-Won Jung
- Division of Intractable Diseases, Center for Biomedical Sciences, Korea National Institute of Health, Chungbuk, Republic of Korea
| | - Seunghee Lee
- Adult Stem Cell Research Center, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
- Department of Veterinary Public Health, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
- Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
| | - Hyung-Sik Kim
- Adult Stem Cell Research Center, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
- Department of Veterinary Public Health, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
- Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
| | - Kyung-Sun Kang
- Adult Stem Cell Research Center, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
- Department of Veterinary Public Health, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
- Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
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22
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Holotnakova T, Tylkova L, Takacova M, Kopacek J, Petrik J, Pastorekova S, Pastorek J. Role of the HBx oncoprotein in carbonic anhydrase 9 induction. J Med Virol 2010; 82:32-40. [PMID: 19950233 DOI: 10.1002/jmv.21671] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Carbonic anhydrase 9 (CA9), as one of the most hypoxia-responsive genes, has been associated almost exclusively with hypoxic tumors. Its principal role is in pH regulation which helps tumor cells overcome intracellular acidosis and survive extended periods of time with low oxygen. Hypoxia-inducible factor 1 (HIF-1) is the main transcriptional activator of CA9. Hepatitis B virus X protein (HBx) has been shown to increase the transcriptional activity of HIF-1. HBx is often expressed from the gene integrated in the hepatocytes infected persistently and contributes significantly to alterations in host gene expression that can lead to the development of hepatocellular carcinoma (HCC) associated with Hepatitis B virus (HBV). The aim of this study was to determine the effect of HBx on expression of CA9. Transient transfection of HBx led to an increase in the expression of CA9 as assessed by RT-PCR and Western blotting. HBx was able to increase CA9 promoter activity significantly in several cell lines. The effect was mediated via HIF-1 and a functional HRE element located -10/-3 bp upstream of the CA9 transcription initiation site. These data suggest that CA9 may be involved in the development of HCC by contributing to the survival of hepatocytes infected with HBV in liver tissue with fibrosis.
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Affiliation(s)
- Tereza Holotnakova
- Institute of Virology, Slovak Academy of Sciences, Bratislava, Slovak Republic
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23
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Early origins of health disparities: burden of infection, health, and socioeconomic status in U.S. children. Soc Sci Med 2009; 68:699-707. [PMID: 19152993 DOI: 10.1016/j.socscimed.2008.12.010] [Citation(s) in RCA: 133] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2008] [Indexed: 01/01/2023]
Abstract
Recent work in biodemography has suggested that lifetime exposure to infection and inflammation may be an important determinant of later-life morbidity and mortality. Early exposure to infections during critical periods can predispose individuals to chronic disease, in part through the reallocation of energy away from development needed for immune and inflammatory responses. Furthermore, markers of inflammation are known to vary by socioeconomic status in adults and may contribute to overall socioeconomic health inequalities, but little is known about how the sources of this inflammation differ over the life course. This paper uses novel biomarker data from the Third National Health and Nutrition Examination Survey (NHANES III) to test the association of the burden of common chronic infections (Helicobacter pylori (H. pylori), cytomegalovirus (CMV), herpes simplex virus-1 (HSV-1), hepatitis A and hepatitis B) with height-for-age and asthma/chronic respiratory conditions in U.S. children ages 6 and older, and the association of these chronic infections to children's socioeconomic status. A higher burden of infection is found to be associated with lower height-for-age as well as an increased likelihood of asthma net of race/ethnicity, family income, and parental education. Children with lower family income, lower parental education, and non-white race/ethnicity have a higher likelihood of infection with several individual pathogens as well as the overall burden of infection. Differential exposure and/or susceptibility to infections may be one mechanism through which early social factors get embodied and shape later-life health outcomes.
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Rong Q, Zhang L, Su E, Li J, Li J, Liu Z, Huang Z, Ma W, Cao K, Huang J. Bone marrow-derived mesenchymal stem cells are capable of mediating hepatitis B virus infection in injured tissues. J Viral Hepat 2008; 15:607-14. [PMID: 18507756 DOI: 10.1111/j.1365-2893.2008.00978.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
UNLABELLED We have previously showed that endothelial progenitor cells (EPCs) through uptake of hepatitis B virus (HBV) may play a critical role in mediating extrahepatic HBV diseases. However, it remains to be elucidated whether mesenchymal stem cells (MSCs) are capable of mediating HBV trans-infection into extrahepatic tissues. METHODS AND RESULTS In this study, we showed that HBV antigens, HBV DNA and the viral particles were detected in MSCs after 3 days virus challenge. Neither HBV covalently closed circular DNA nor pregenomic RNA were detected in MSCs. Intravenously transplantation of HBV-exposed MSCs into myocardial infarction mouse model resulted in incorporation of HBV into injured heart and other damaged tissues. CONCLUSION These results indicate that MSCs could serve as an additional extrahepatic virus reservoir, which may play a role at least in part in mediating HBV trans-infection into the injured tissues through the process of MSCs recruitment.
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Affiliation(s)
- Q Rong
- Department of Cardiology, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
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