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de Weerd NA, Vivian JP, Lim SS, Huang SUS, Hertzog PJ. Structural integrity with functional plasticity: what type I IFN receptor polymorphisms reveal. J Leukoc Biol 2021; 108:909-924. [PMID: 33448473 DOI: 10.1002/jlb.2mr0420-152r] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 03/21/2020] [Accepted: 03/26/2020] [Indexed: 12/13/2022] Open
Abstract
The type I IFNs activate an array of signaling pathways, which are initiated after IFNs bind their cognate receptors, IFNα/β receptor (IFNAR)1 and IFNAR2. These signals contribute to many aspects of human health including defense against pathogens, cancer immunosurveillance, and regulation of inflammation. How these cytokines interact with their receptors influences the quality of these signals. As such, the integrity of receptor structure is pivotal to maintaining human health and the response to immune stimuli. This review brings together genome wide association studies and clinical reports describing the association of nonsynonymous IFNAR1 and IFNAR2 polymorphisms with clinical disease, including altered susceptibility to viral and bacterial pathogens, autoimmune diseases, cancer, and adverse reactions to live-attenuated vaccines. We describe the amino acid substitutions or truncations induced by these polymorphisms and, using the knowledge of IFNAR conformational changes, IFNAR-IFN interfaces and overall structure-function relationship of the signaling complexes, we hypothesize the effect of these polymorphisms on receptor structure. That these predicted changes to IFNAR structure are associated with clinical manifestations of human disease, highlights the importance of IFNAR structural integrity to maintaining functional quality of these receptor-mediated responses. Type I IFNs are pivotal to innate immune responses and ultimately, to human health. Understanding the consequences of altered structure on the actions of these clinically significant cell receptors provides important information on the roles of IFNARs in health and disease.
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Affiliation(s)
- Nicole A de Weerd
- Centre for Innate Immunity and Infectious Diseases, Department of Molecular and Translational Science, Hudson Institute of Medical Research and Monash University, Clayton, Victoria, Australia
| | - Julian P Vivian
- Infection and Immunity Program, Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute and Australian Research Council Centre for Excellence for Advanced Molecular Imaging, Monash University, Clayton, Victoria, Australia
| | - San S Lim
- Centre for Innate Immunity and Infectious Diseases, Department of Molecular and Translational Science, Hudson Institute of Medical Research and Monash University, Clayton, Victoria, Australia
| | - Stephanie U-Shane Huang
- Centre for Innate Immunity and Infectious Diseases, Department of Molecular and Translational Science, Hudson Institute of Medical Research and Monash University, Clayton, Victoria, Australia
| | - Paul J Hertzog
- Centre for Innate Immunity and Infectious Diseases, Department of Molecular and Translational Science, Hudson Institute of Medical Research and Monash University, Clayton, Victoria, Australia
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2
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Li M, Li YP, Deng HL, Wang MQ, Wang WJ, Wang J, Wu FP, Dang SS. Association of gene polymorphisms of CD55 with susceptibility to and severity of hand, foot, and mouth disease caused by enterovirus 71 in the Han Chinese population. J Med Virol 2020; 92:3119-3124. [PMID: 32470169 DOI: 10.1002/jmv.26088] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Accepted: 05/23/2020] [Indexed: 12/13/2022]
Abstract
Hand, foot, and mouth disease (HFMD) caused by enterovirus 71 (EV71) can lead to high morbidity and mortality, and genetic background plays an important role during the disease process. We investigated the association between the single-nucleotide polymorphism (SNP) rs2564978 of the CD55 gene and susceptibility to and severity of HFMD using the SNPs can multiple SNP typing methods. Soluble CD55 (sCD55) expression was significantly lower in the EV71 HFMD group than in the control group and lower in severe cases than in mild cases (P < .001). Moreover, CD55 rs2564978 (C vs T OR = 1.300, 95% CI, 1.120-1.509) was associated with the risk of EV71 infection, and genotype TC was related to the severity of the infection (TC vs TT OR = 4.523, 95% CI, 2.033-10.066). Our results suggest that sCD55 expression and the CD55 polymorphism rs2564978 may influence the susceptibility to and severity of EV71 infection.
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Affiliation(s)
- Mei Li
- Department of Infectious Diseases, Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Ya-Ping Li
- Department of Infectious Diseases, Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Hui-Ling Deng
- Department of Infectious Diseases, Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
- Department of Infectious Diseases, Xi'an Children's Hospital, Xi'an, China
| | - Mu-Qi Wang
- Department of Infectious Diseases, Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Wen-Jun Wang
- Department of Infectious Diseases, Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Jun Wang
- Department of Infectious Diseases, Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
- Department of Infectious Diseases, Xi'an Children's Hospital, Xi'an, China
| | - Feng-Ping Wu
- Department of Infectious Diseases, Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Shuang-Suo Dang
- Department of Infectious Diseases, Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
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Naseri Z, Bahmani N, Alikhani MY, Hashemi SH, Roshanaei G. Polymorphisms in Promoter Region of the Interferon-Gamma Receptor-1 Gene and its Relation with Susceptibility to Brucellosis. IRANIAN JOURNAL OF PATHOLOGY 2019; 14:206-211. [PMID: 31582997 PMCID: PMC6742735 DOI: 10.30699/ijp.2019.91536.1888] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2018] [Accepted: 03/31/2019] [Indexed: 11/29/2022]
Abstract
Background & Objective: Brucellosis is one of the most prevalent bacterial zoonotic diseases which afflicts both humans and animals. Genetic factors play an important role in susceptibility to brucellosis. One of these factors is interferon-gamma (IFN-), which is vital in the defense mechanism against infectious diseases such as brucellosis. The purpose of this study was to evaluate the relationship between two single nucleotide polymorphisms (SNPs) at positions -611 and -56 within the promoter region of interferon-gamma receptor-1 gene (IFN- R1) and brucellosis. Methods: In this research, the genomic DNA was collected from 60 peripheral blood samples infected with brucellosis and 68 healthy volunteers. DNA was extracted by salting out method. Then, DNA genotypes were analyzed using polymerase chain reaction-restriction fragment length polymorphisms (PCR-RFLP). Results: The results showed that there is a significant difference in -611 SNP frequencies between control and patient groups. At position -611, CC genotype was related to patient group (P=0.024) and TT genotype was related to the control group. According to the results, males had a higher frequency of Brucella infection. Conclusion: The presence of C allele in position -611 in IFNγ R1 gene promoter was related to a higher risk of disease and susceptibility to brucellosis. Moreover, the presence of T allele in position γ
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Affiliation(s)
- Zahra Naseri
- Blood Transfusion Research Center, High Institute for Research and Education in Transfusion, Hamadan, Iran
| | - Nasrin Bahmani
- Zoonoses Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran
| | | | - Seyed Hamid Hashemi
- Brucellosis Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Ghodratollah Roshanaei
- Department of Biostatistics and Epidemiology, Hamadan University of Health Sciences, Hamadan, Iran
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Karamitros T, Papatheodoridis G, Paraskevis D, Hatzakis A, Mbisa JL, Georgopoulou U, Klenerman P, Magiorkinis G. Impact of Interferon-α Receptor-1 Promoter Polymorphisms on the Transcriptome of the Hepatitis B Virus-Associated Hepatocellular Carcinoma. Front Immunol 2018; 9:777. [PMID: 29713327 PMCID: PMC5911724 DOI: 10.3389/fimmu.2018.00777] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Accepted: 03/28/2018] [Indexed: 12/22/2022] Open
Abstract
Background and aims Genetic polymorphisms within the promoter of interferon-α receptor type-1 (IFNAR1) have been associated with the susceptibility to and the outcome of chronic hepatitis B virus (HBV) infection. However, the impact of these polymorphisms in the transcriptome of the HBV-associated hepatocellular carcinoma (HCC) remains largely unexplored. Methods Using whole-genome and exome sequencing data from The Cancer Genome Atlas project, we characterized three single-nucleotide polymorphisms (SNPs: −568G/C, −408C/T, −3C/T) and one variable number tandem repeat [VNTR: −77(GT)n] within the IFNAR1 promoter sequence in 49 HCC patients. RNAseq data from 10 genotyped HCC samples were grouped according to their −77VNTR or −3SNP genotype to evaluate the impact of these polymorphisms on the differential expression on the HCC transcriptome. Results There is a fourfold higher impact of the −77VNTR on the HCC transcriptome compared to the −3SNP (q < 0.1, p < 0.001). The expression of the primary IFNAR1 transcript is not affected by these polymorphisms but a secondary, HCC-specific transcript is expressed only in homozygous −77VNTR ≤8/≤8(GT)n samples (p < 0.05). At the same time, patients carrying at least one −77VNTR >8(GT) allele, presented a strong upregulation of the fibronectin-1 (FN-1) gene, which has been associated with the development of HCC. Gene Ontology and pathway enrichment analysis of the differentially expressed genes revealed a strong disruption of the PI3K–AKT signaling pathway, which can be partially triggered by the extracellular matrix FN-1. Conclusion The IFNAR-1 promoter polymorphisms are not involved in the expression levels of the main IFNAR-1 transcript. The −77VNTR has a regulatory role on the expression of a secondary, truncated, HCC-specific transcript, which in turn coincides with disruptions in cancer-associated pathways and in FN-1 expression modifications.
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Affiliation(s)
- Timokratis Karamitros
- Department of Zoology, University of Oxford, Oxford, United Kingdom.,Department of Microbiology, Public Health Laboratories, Hellenic Pasteur Institute, Athens, Greece
| | - George Papatheodoridis
- Academic Department of Gastroenterology, Laiko General Hospital, Medical School of National and Kapodistrian University of Athens, Athens, Greece
| | - Dimitrios Paraskevis
- Department of Hygiene and Epidemiology and Medical Statistics, Medical School of National and Kapodistrian University of Athens, Athens, Greece
| | - Angelos Hatzakis
- Department of Hygiene and Epidemiology and Medical Statistics, Medical School of National and Kapodistrian University of Athens, Athens, Greece
| | - Jean L Mbisa
- Virus Reference Department, Public Health England, London, United Kingdom
| | - Urania Georgopoulou
- Department of Microbiology, Molecular Virology Laboratory, Hellenic Pasteur Institute, Athens, Greece
| | - Paul Klenerman
- Peter Medawar Building for Pathogen Research and Translational Gastroenterology Unit, University of Oxford, Oxford, United Kingdom
| | - Gkikas Magiorkinis
- Department of Zoology, University of Oxford, Oxford, United Kingdom.,Department of Hygiene and Epidemiology and Medical Statistics, Medical School of National and Kapodistrian University of Athens, Athens, Greece
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Matrix Metalloproteinase 9 Facilitates Hepatitis B Virus Replication through Binding with Type I Interferon (IFN) Receptor 1 To Repress IFN/JAK/STAT Signaling. J Virol 2017; 91:JVI.01824-16. [PMID: 28122987 DOI: 10.1128/jvi.01824-16] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Accepted: 01/18/2017] [Indexed: 02/06/2023] Open
Abstract
Hepatitis B virus (HBV) infection may cause acute hepatitis B, chronic hepatitis B (CHB), liver cirrhosis, and hepatocellular carcinoma (HCC). However, the mechanisms by which HBV evades host immunity and maintains chronic infection are largely unknown. Here, we revealed that matrix metalloproteinase 9 (MMP-9) is activated in peripheral blood mononuclear cells (PBMCs) of HBV-infected patients, and HBV stimulates MMP-9 expression in macrophages and PBMCs isolated from healthy individuals. MMP-9 plays important roles in the breakdown of the extracellular matrix and in the facilitation of tumor progression, invasion, metastasis, and angiogenesis. MMP-9 also regulates respiratory syncytial virus (RSV) replication, but the mechanism underlying such regulation is unknown. We further demonstrated that MMP-9 facilitates HBV replication by repressing the interferon (IFN)/Janus kinase (JAK)/signal transducer and activator of transcription (STAT) pathway, IFN action, STAT1/2 phosphorylation, and IFN-stimulated gene (ISG) expression. Moreover, MMP-9 binds to type I IFN receptor 1 (IFNAR1) and facilitates IFNAR1 phosphorylation, ubiquitination, subcellular distribution, and degradation to interfere with the binding of IFANR1 to IFN-α. Thus, we identified a novel positive-feedback regulation loop between HBV replication and MMP-9 production. On one hand, HBV activates MMP-9 in infected patients and leukocytes. On the other hand, MMP-9 facilitates HBV replication through repressing IFN/JAK/STAT signaling, IFNAR1 function, and IFN-α action. Therefore, HBV may take the advantage of MMP-9 function to establish or maintain chronic infection.IMPORTANCE Hepatitis B virus (HBV) infection may cause chronic hepatitis B (CHB) and hepatocellular carcinoma (HCC). However, the mechanisms by which HBV maintains chronic infection are largely unknown. Matrix metalloproteinase 9 (MMP-9) plays important roles in the facilitation of tumor progression, invasion, metastasis, and angiogenesis. However, the effects of MMP-9 on HBV replication and pathogenesis are not known. This study reveals that MMP-9 expression is activated in patients with CHB, and HBV stimulates MMP-9 production in PBMCs and macrophages. More interestingly, MMP-9 in turn promotes HBV replication through suppressing IFN-α action. Moreover, MMP-9 interacts with type I interferon receptor 1 (IFNAR1) to disturb the binding of IFN-α to IFNAR1 and facilitate the phosphorylation, ubiquitination, subcellular distribution, and degradation of IFNAR1. Therefore, these results discover a novel role of MMP-9 in viral replication and reveal a new mechanism by which HBV evades host immunity to maintain persistent infection.
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Rehman SU, Rauf M, Abbas Z, Hamed MH, Qadri I. Role of Some Predominant Host Immunomodulators' Single Nucleotide Polymorphisms in Severity of Hepatitis B Virus and Hepatitis C Virus Infection. Viral Immunol 2016; 29:536-545. [PMID: 27676210 DOI: 10.1089/vim.2016.0062] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Hepatitis B and C infections can be either acute or chronic. The chronic infection can culminate in liver cirrhosis and hepatocellular carcinoma. Influence of the host genetic makeup on conversion of acute to chronic infection, development of cirrhosis, and hepatocellular carcinoma is an interesting area of research. Variability in different immune system genes may account for such differences in the outcome of infection. This article discusses single nucleotide polymorphisms in different host immunomodulator genes that have been frequently reported to influence the outcome of infection and severity of disease. The genetic variability could be utilized for the prediction of disease outcome and treatment responses.
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Affiliation(s)
- Shafiq Ur Rehman
- 1 Department of Microbiology and Molecular Genetics, University of the Punjab , Lahore, Pakistan
| | - Mahd Rauf
- 1 Department of Microbiology and Molecular Genetics, University of the Punjab , Lahore, Pakistan
| | - Zaigham Abbas
- 1 Department of Microbiology and Molecular Genetics, University of the Punjab , Lahore, Pakistan
| | - Muhammed Haroon Hamed
- 2 Department of Biological Sciences, King Abdul Aziz University , Jeddah, Kingdom of Saudi Arabia
| | - Ishtiaq Qadri
- 2 Department of Biological Sciences, King Abdul Aziz University , Jeddah, Kingdom of Saudi Arabia
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Huang J, Xiong L, Wang J, Liu Y, Zhu Q, Lei J, Zhou Z. Association between the HLA-DQB1 polymorphisms and the susceptibility of chronic hepatitis B: A comprehensive meta-analysis. Biomed Rep 2016; 4:557-566. [PMID: 27123247 PMCID: PMC4840628 DOI: 10.3892/br.2016.632] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Accepted: 01/26/2016] [Indexed: 12/14/2022] Open
Abstract
Single-nucleotide polymorphisms in the human leukocyte antigen (HLA)-DQB1 gene are associated with chronic inflammatory and immunological diseases. Host genetic factors have a key role in the development of chronic hepatitis B (CHB). The aim of the present study was to investigate the association between the HLA-DQB1 polymorphisms and the susceptibility to CHB. PubMed, Embase, CNKI and Wanfang databases were searched for the studies that reported the association of the HLA-DQB1 polymorphisms with CHB between January 1, 1966 and July 30, 2015. HLA-DQB1 polymorphism-specific odds ratio (OR) and 95% confidence intervals (95% CI) were pooled and calculated in the fixed effects model using the Mantel-Haenszel method. Q-test and I2 test were performed to examine the heterogeneity. Begg's funnel test and Egger's test were conducted to assess publication bias. All the statistical tests were two-tailed. Subsequent to searching the databases and screening according to the inclusion criteria, 7 case-control studies were available in the present meta-analysis, including 815 CHB patients and 731 control subjects for the HLA-DQB1 polymorphisms. In conclusion, the statistically significant pooled OR of the HLA-DQB1 polymorphisms were obtained for the HLA-DQB1 loci (*0201, case vs. CONTROL I2=36.5%; P-value of heterogeneity=0.15; OR, 1.29; 95% CI, 1.02-1.64; P=0.0301; *0301, case vs. CONTROL I2=0%; P-value of heterogeneity=0.899; OR, 1.37; 95% CI, 1.12-1.69; P=0.002; *0502, case vs. CONTROL I2=24.9%; P-value of heterogeneity=0.239; OR, 1.50; 95% CI, 1.02-2.20; P=0.04), which were associated with an increased risk of CHB. Similar significant results were observed and acquired in the following HLA-DQB1 loci (*0303, case vs. CONTROL I2=0%; P-value of heterogeneity=0.986; OR, 0.77; 95% CI, 0.62-0.95; P=0.017; *0604, case vs. CONTROL I2=0%; P-value of heterogeneity=0.594; OR, 0.38; 95% CI, 0.20-0.74; P=0.003), which were associated with a decreased risk of CHB. No significant association was observed for the other HLA-DQB1 family loci. The present meta-analysis demonstrated that the HLA-DQB1 loci (*0201, *0301 and *0502) polymorphisms were significantly associated with an increased risk of CHB. However, HLA-DQB1 loci polymorphisms (*0303 and *0604) were associated with a decreased risk of CHB. These results support the hypothesis that polymorphisms of the HLA-DQB1 allele families may affect the susceptibility or resistance to CHB.
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Affiliation(s)
- Jinmei Huang
- Department of Infectious Disease, The Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan 637000, P.R. China
| | - Liangshi Xiong
- Department of Infectious Disease, The Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan 637000, P.R. China
| | - Jin Wang
- Department of Infectious Disease, The Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan 637000, P.R. China
| | - Yongfang Liu
- Department of Infectious Disease, The Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan 637000, P.R. China
| | - Qirong Zhu
- Department of Infectious Disease, The Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan 637000, P.R. China
| | - Jun Lei
- School of Pharmacy, North Sichuan Medical College, Nanchong, Sichuan 637000, P.R. China
| | - Zhonghui Zhou
- Department of Infectious Disease, The Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan 637000, P.R. China
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A functional polymorphism in IFNAR1 gene is associated with susceptibility and severity of HFMD with EV71 infection. Sci Rep 2015; 5:18541. [PMID: 26679744 PMCID: PMC4683517 DOI: 10.1038/srep18541] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Accepted: 11/19/2015] [Indexed: 12/15/2022] Open
Abstract
Enterovirus 71 (EV71), one of the major pathogens of Hand, foot and mouth disease (HFMD), results in millions of infections and hundreds of deaths each year in Southeast Asia. Biased infection and variable clinical manifestations of EV71 HFMD indicated that host genetic background played an important role in the occurrence and development of the disease. We identified the mRNA profiles of EV71 HFMD patients, which type I interferon (IFN) pathway related genes were down-regulated. Four single nucleotide polymorphisms (SNPs) of type I IFN receptor 1 (IFNAR1) were chosen to analyze their relationships to EV71 infection. We found that genotype GG of promoter variant rs2843710 was associated with the susceptibility and severity to EV71 HFMD. In addition, we assessed the regulatory effects of rs2843710 to IFN stimulated genes (ISGs), and found that the expressions of IFNAR1, OAS1 and MX1 were significantly lower in patients with rs2843710 genotype GG. And rs2843710 allele G showed weaker transcriptional activity compared with allele C. Our study indicated that rs2843710 of IFNAR1 was associated with the susceptibility and severity of EV71 HFMD in Chinese Han populations, acting as a functional polymorphism by regulating ISGs expression, such as OAS1 and MX1.
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Karamitros T, Papatheodoridis G, Dimopoulou E, Papageorgiou MV, Paraskevis D, Magiorkinis G, Sypsa V, Hatzakis A. The interferon receptor-1 promoter polymorphisms affect the outcome of Caucasians with HBeAg-negative chronic HBV infection. Liver Int 2015; 35:2506-13. [PMID: 25939635 DOI: 10.1111/liv.12859] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Accepted: 04/27/2015] [Indexed: 02/10/2023]
Abstract
BACKGROUND & AIMS The outcome of HBeAg-negative chronic hepatitis B virus (HBV) patients who may remain in the inactive carrier state (IC) or progress to HBeAg-negative chronic hepatitis B may be affected by the host genetic profile. Genetic polymorphisms within not only the promoter but also the coding sequence of the interferon receptor 1 (INFAR1) gene have been associated with susceptibility to chronic HBV infection, but their role on the outcomes of HBeAg-negative patients has not been evaluated. We examined the association of INFAR1 promoter polymorphisms with the phase of chronic HBV infection in a demographically characterized Caucasian cohort of 183 consecutive HBeAg-negative chronic HBV patients. METHODS Using a combination of conventional and allele-specific polymerase chain reactions, bidirectional sequencing and DNA-fragment analysis, we performed typing of three Single Nucleotide Polymorphisms (SNPs -568G/C, -408C/T, -3C/T) and one Variable Number Tandem Repeat [VNTR -77(GT)n] within the INFR1 promoter sequence. RESULTS The genetic polymorphisms examined were found to be associated with the phase of HBeAg-negative chronic HBV patients. Using a multiple logistic regression model adjusting for age, gender and origin of the individuals, we found that patients with linked genotypes -408CT_-3CT were more likely to be ICs (OR = 2.42 vs. CC, P = 0.036). Also, given the partial linkage between SNP -568G/C and VNTR -77(GT)n, we found that linked genotypes -77(GT)n ≤ 8/≤8_-568GC and -77(GT)n ≤ 8/≤8_-568CC were detected more frequently among ICs (OR = 11.69, P = 0.005 and OR = 7.56, P = 0.001 vs. -77(GT)n >8/>8_-568GG respectively). CONCLUSIONS These findings suggest that these genetic variations represent important factors associated with the clinical phase of HBeAg-negative chronic HBV infection.
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Affiliation(s)
- Timokratis Karamitros
- Department of Hygiene and Epidemiology and Medical Statistics, Athens University Medical School, Athens, Greece.,Department of Zoology, University of Oxford, Oxford, UK
| | - George Papatheodoridis
- 2nd Department of Internal Medicine, Hippokration General Hospital, Athens University Medical School, Athens, Greece.,Academic Department of Gastroenterology, Laiko General Hospital, Athens University Medical School, Athens, Greece
| | - Eleni Dimopoulou
- 2nd Department of Internal Medicine, Hippokration General Hospital, Athens University Medical School, Athens, Greece
| | - Maria-Vasiliki Papageorgiou
- 2nd Department of Internal Medicine, Hippokration General Hospital, Athens University Medical School, Athens, Greece.,Academic Department of Gastroenterology, Laiko General Hospital, Athens University Medical School, Athens, Greece
| | - Dimitrios Paraskevis
- Department of Hygiene and Epidemiology and Medical Statistics, Athens University Medical School, Athens, Greece
| | - Gkikas Magiorkinis
- Department of Hygiene and Epidemiology and Medical Statistics, Athens University Medical School, Athens, Greece.,Department of Zoology, University of Oxford, Oxford, UK
| | - Vana Sypsa
- Department of Hygiene and Epidemiology and Medical Statistics, Athens University Medical School, Athens, Greece
| | - Angelos Hatzakis
- Department of Hygiene and Epidemiology and Medical Statistics, Athens University Medical School, Athens, Greece
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Zhang W, Lv F, Gao YF, Zou GZ, Pan FM, Li X. Association between BTLA polymorphisms and genetic susceptibility to chronic HBV infection. Shijie Huaren Xiaohua Zazhi 2015; 23:2373-2381. [DOI: 10.11569/wcjd.v23.i15.2373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the association between BTLA polymorphisms and genetic susceptibility to chronic hepatitis B virus (HBV) infection in a Chinese Han population.
METHODS: The rs2633562 and rs2952323 single nucleotide polymorphisms (SNPs) of the BTLA gene were genotyped by Multiplex SNaPshot technique in patients with chronic HBV infection and other family members (HBsAg negative). Genotype and allele frequencies were calculated and analyzed. The association between the gene polymorphisms of BTLA and genetic susceptibility to chronic HBV infection was analyzed by a family-based association method.
RESULTS: Association or linkage was detected among 431 patients. Univariate family-based association tests (FBATs) demonstrated that the G/G genotype in rs2952323 of the BTLA gene was associated with chronic HBV infection, and the variant allele G at rs2952323 was significantly associated with genetic susceptibility to chronic HBV infection in additive model (Z = 2.689, P = 0.0007174) and recessive model (Z = 2.731, P = 0.006308). Transmission/disequilibrium test (TDT) and sibship disequilibuium test (SDT) analysis showed no increased transmission for the major alleles (A, C or G) from heterozygous parents to affected offspring (P = 1.000000, P = 0.151590, respectively). Furthermore, haplotype-specific FBATs showed that AG haplotype (70.0%) was more frequently transmitted in chronic HBV infection than other haplotypes in additive model (Z = 3.093, P = 0.001979) and recessive model (Z = 2.825, P = 0.004721).
CONCLUSION: The gene polymorphisms of BTLA may participate in chronicity of HBV infection in the Chinese Han population.
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Establishment and application of hepatitis B virus persistent replication model in IFNAR(-/-) mouse. ACTA ACUST UNITED AC 2013; 33:392-397. [PMID: 23771666 DOI: 10.1007/s11596-013-1130-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2012] [Indexed: 02/07/2023]
Abstract
The type I interferon and IFNAR play an important role in hepatitis B virus (HBV) infection and anti-HBV therapy. However, its mechanism of action is still poorly understood. To gain more insights into the role of type I interferon and type I interferon receptor (IFNAR) in HBV infection, we established an HBV persistent replication IFNAR knockout (IFNAR(-/-)) mouse model and preliminarily applied this model. At first, the progeny of IFNAR(-/-) mouse was reproduced. Then hydrodynamic injection with pAAV/HBV1.2 plasmid was conducted to establish the persistent HBV replication IFNAR(-/-) mouse model. At last, we applied this model to evaluate the effect of nucleoside analogues entecavir (ETV) on HBV replication. It was found that there was no difference in the serum HBsAg and HBeAg levels and HBcAg expression in the liver tissue between the ETV treated groups and normal saline (NS) treated group, but the serum HBV DNA levels were significantly suppressed 10, 25, 40 and 55 days after the ETV treatment [P=0.035, P=0.00, P=0.149 and P=0.084, IFNAR knockout (KO) control group vs. C57BL/6 ETV groups, respectively; P=0.081, P=0.001, P=0.243 and P=0.147, IFNAR KO control group vs. IFNAR KO ETV groups, respectively]. Interestingly, there was no difference in serum HBV DNA levels between the ETV treated IFNAR(-/-) and C57BL/6 mice. This result suggests that HBV suppression during ETV treatments doesn't depend on type I interferon and IFNAR. Collectively, persistent HBV replication IFNAR(-/-) mouse model that we established is a useful and convenient tool to detect the function of the type I interferon and IFNAR in HBV infection and anti-HBV treatments.
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Kimkong I, Tangkijvanich P, Hirankarn N. Association of interferon-alpha gene polymorphisms with chronic hepatitis B virus infection. Int J Immunogenet 2013; 40:476-81. [PMID: 23566196 DOI: 10.1111/iji.12055] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2012] [Revised: 01/30/2013] [Accepted: 03/10/2013] [Indexed: 12/15/2022]
Abstract
In this study, the association between the risk of chronic hepatitis B virus infection and the polymorphisms within promoter regions of IFN-α1 and five genes was explored. This association study was performed on 180 Thai patients with chronic HBV infection [hepatocellular carcinoma (HCC) = 65 and non-HCC = 115], 173 individuals with self-limited HBV infection and 140 healthy controls. Our results showed that the A allele of -1823G/A SNP within IFNA1 gene was significantly associated with an increased risk of chronic HBV infection as compared to healthy individuals and self-limited HBV group [OR (95% CI) = 2.20 (1.51-3.19), P = 0.000014 and OR (95% CI) = 1.61 (1.12-2.33), P = 0.0073, respectively]. The effect of A allele was similar to autosomal recessive in which the presence of AA genotype when compared to GG and GA conferred the OR of 2.79 (95% CI = 1.72-4.52, P = 0.0000085). By multifactor dimensionality reduction analysis, we found the interaction between IFNA5 (-2529) and IFNA1 (-1823) genes that gave the risk to chronic HBV infection, with the OR (95% CI) of the high-risk to low-risk group was 2.79 (1.77-4.40), P < 0.0001. However, further study in functional significance is required.
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Affiliation(s)
- I Kimkong
- Department of Microbiology, Faculty of Science, Kasetsart University, Bangkok, Thailand; Center for Advanced Studies in Tropical Natural Resources, National Research University-Kasetsart University, Kasetsart University, Bangkok, Thailand
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Khanizadeh S, Ravanshad M, Mohebbi SR, Naghoosi H, Abrahim Tahaei M, Mousavi Nasab SD, Romani S, Azimzadeh P, Sanati A, Zali MR. Polymorphisms within the Promoter Region of the Gamma Interferon (IFN-γ) Receptor1 Gene are Associated with the Susceptibility to Chronic HBV Infection in an Iranian Population. HEPATITIS MONTHLY 2012; 12:e7283. [PMID: 23300496 PMCID: PMC3539059 DOI: 10.5812/hepatmon.7283] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/17/2012] [Revised: 08/15/2012] [Accepted: 09/15/2012] [Indexed: 12/11/2022]
Abstract
BACKGROUND chronic hepatitis B virus (HBV) infection is a multifactorial disease that can result in serious clinical complications. Host genetic background especially the genes that encode immunologic factors like INF-γ and its receptor (IFN-γ R) are critical in the pathogenesis of infection. OBJECTIVES The current study aimed to investigate the association between two single nucleotide polymorphisms (SNPs) at positions -611 and -56 within the promoter region of gamma interferon receptor1 gene (IFN-γ R1) and chronic HBV infection. MATERIALS AND METHODS Genomic DNA from peripheral blood samples of 200 chronically HBV infected patients and 200 healthy blood donors, as controls, were collected and genomic DNA was extracted by phenol-chloroform method and DNA analysis genotype identification was performed by PCR-RFLP. RESULTS The results indicated that both SNP's frequency had a significant difference in the patient and control groups. At position -56, TT genotype was associated with patient group and P value was 0.002 and at position -611, GG genotype was further observed in control group and P value was 0.006. CONCLUSIONS Presence of G allele at position -611 within promoter of IFN-γ R1 gene in the enrolled population for the study was related to lower risk of disease, and presence of T allele at position -56 was also related to susceptibility to chronic HBV infection. Men had higher frequency of chronic HBV infection, which might be the result of high risk behavior.
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Affiliation(s)
- Sayyad Khanizadeh
- Department of Virology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, IR Iran
| | - Mehrdad Ravanshad
- Department of Virology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, IR Iran
- Corresponding author: Mehrdad Ravanshad, Department of Virology, Faculty of Medical Sciences, Tarbiat Modares University, P.O. Box: 14115-331, Tehran, IR Iran. Tel.: +98-2182883836, Fax: +98-2182883581, E-mail:
| | - Seyed Reza Mohebbi
- Research Center for Gastroenterology and Liver Disease, Shaheed Beheshti University of Medical Sciences, Tehran, IR Iran
- Corresponding author: Seyed Reza Mohebbi, Research Center for Gastroenterology and Liver Disease, Shaheed Beheshti University of Medical Sciences, Tehran, IR Iran. P.O. Box: 14115-331, Tehran, IR Iran. Tel.: +98-2122432515, Fax: +98-2122432516, E-mail:
| | - Hamed Naghoosi
- Research Center for Gastroenterology and Liver Disease, Shaheed Beheshti University of Medical Sciences, Tehran, IR Iran
| | - Mohamad Abrahim Tahaei
- Research Center for Gastroenterology and Liver Disease, Shaheed Beheshti University of Medical Sciences, Tehran, IR Iran
| | | | - Sara Romani
- Research Center for Gastroenterology and Liver Disease, Shaheed Beheshti University of Medical Sciences, Tehran, IR Iran
| | - Pedram Azimzadeh
- Research Center for Gastroenterology and Liver Disease, Shaheed Beheshti University of Medical Sciences, Tehran, IR Iran
| | - Azar Sanati
- Research Center for Gastroenterology and Liver Disease, Shaheed Beheshti University of Medical Sciences, Tehran, IR Iran
| | - Mohammad Reza Zali
- Research Center for Gastroenterology and Liver Disease, Shaheed Beheshti University of Medical Sciences, Tehran, IR Iran
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Chen K, Min H, Wu X, Zhu X, Li Z, Li H, Liu Y. JAK1 gene polymorphisms are associated with the outcomes of hepatitis B virus infection, but not with α interferon therapy response in a Han Chinese population. Genet Test Mol Biomarkers 2012; 16:1206-10. [PMID: 22901011 DOI: 10.1089/gtmb.2012.0141] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
AIMS Janus kinase 1 (JAK1) is a key member in the interferon (IFN) signaling pathway. Recent studies suggested single-nucleotide polymorphisms (SNPs) in IFN pathway genes are associated with outcomes of hepatitis B virus (HBV) infection and response to IFNα therapy. The aim of the study is to investigate whether SNPs in JAK1 were associated with outcomes of HBV infection and response to IFNα therapy. METHODS We enrolled 395 chronic hepatitis B (CHB) patients and 251 subjects with the inactive carrier state, and 256 CHB patients who received IFNα treatment, with therapy efficacy evaluated. Twelve SNPs: rs310227, rs7531799, rs7546545, rs17127174, rs3790541, rs10493373, rs2780898, rs310247, rs310196, rs2780895, rs4244165, and rs17127024 in JAK1, which could represent all SNPs with minor allele frequency >0.2 recorded in the HapMap database were genotyped using a polymerase chain reaction-restriction fragment length polymorphism protocol and the TaqMan method. RESULTS SNP rs17127024 was associated with outcomes of HBV infection in an allele frequency (p=0.014) and genotype distributions (p=0.031), while SNP rs4244165 was associated with outcomes of HBV infection only in genotype distributions (p=0.008). There were no significant differences in allele frequencies and genotype distributions of these SNPs between the response group and the nonresponse group to IFNα therapy. CONCLUSIONS SNPs rs4244165 and rs17127024 in JAK1 were associated with outcomes of HBV infection, but not with response to IFNα therapy.
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Affiliation(s)
- Kangmei Chen
- National Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine, Peking Union Medical College, Beijing, P.R. China
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15
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Zhou C, Yu Q, Chen L, Wang J, Zheng S, Zhang J. A miR-1231 binding site polymorphism in the 3'UTR of IFNAR1 is associated with hepatocellular carcinoma susceptibility. Gene 2012; 507:95-8. [PMID: 22824466 DOI: 10.1016/j.gene.2012.06.073] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2012] [Revised: 06/12/2012] [Accepted: 06/21/2012] [Indexed: 12/21/2022]
Abstract
Hepatocellular carcinoma (HCC) is a common liver malignancy worldwide and genetic factors play important roles in the pathogenesis of HCC. Based on in-silico analysis, a case-control study including 420 HCC patients and 420 healthy controls was conducted to investigate the association between HCC susceptibility with a 4-bp insertion/deletion polymorphism (rs17875871) in the 3'UTR of IFNAR1. Computational modeling suggested that rs17875871 was located in seed region of miR-1231 potential target sequence in IFNAR1 3'UTR. Logistic regression analysis showed that the heterozygote and the 4-bp del/del homozygote genotypes confer significantly higher risks of HCC (adjusted OR=1.35, 95% CI=1.01-1.83, P=0.045; OR=1.84, 95% CI=1.18-2.84, P=0.006, respectively). Stratification analysis revealed that this association was more pronounced in HBsAg positive subgroup. Our findings suggested common genetic changes in IFNAR1 may influence HCC risk, likely through miR-1231-mediated regulation, which is possibly involved in the pathogenesis of HBV related HCC. Further replication studies and functional characterization of rs17875871 were needed to fully clarify the underlined molecular mechanism.
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Affiliation(s)
- Chunxiao Zhou
- Department of Gastroenterology, Suzhou Municipal Hospital, Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou, 215002, Jiangsu, China
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Hepatitis B virus nucleocapsid but not free core antigen controls viral clearance in mice. J Virol 2012; 86:9266-73. [PMID: 22718814 DOI: 10.1128/jvi.00608-12] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
We have recently shown that hepatitis B virus (HBV) core antigen (HBcAg) is the major viral factor for HBV clearance using a hydrodynamics-based mouse model. Knockout of HBcAg hampers the development of antiviral immune responses and thus promotes HBV persistence. Here, we further demonstrated that only in the capsid form, but not the free or dimer form, can HBcAg exert its contributory role in HBV clearance. HBcAg is the main structural protein of HBV icosahedral nucleocapsid. A mutant HBV DNA which expresses an assembly-defective HBcAg, HBcAgY132A, surprisingly prolonged HBV surface antigenemia in both C57BL/6 and BALB/c mice without affecting viral transcription and translation. This result was not due to a loss of the possible immune epitope caused by the single-amino-acid substitution of HBcAg. Moreover, the particular HBV mutant failed to induce robust humoral and cellular immunity against HBV. These data revealed the requirement of capsid structure for inducing adequate immunity that leads to HBV clearance in mice.
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Molecular characterization of the type I IFN receptor in two woodchuck species and detection of its expression in liver samples from woodchucks infected with woodchuck hepatitis virus (WHV). Cytokine 2012; 60:179-85. [PMID: 22705153 DOI: 10.1016/j.cyto.2012.05.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2011] [Revised: 05/15/2012] [Accepted: 05/17/2012] [Indexed: 02/06/2023]
Abstract
Type I interferons (IFN-α/β) serve as the first line of defense against viral infection and share the same type I IFN receptor (IFNAR) complex, which is composed of IFNAR1 and -2. The Eastern woodchuck (Marmota monax) and Chinese woodchuck (Marmota himalayana) are suitable for studying hepatitis B virus (HBV) infection. Here, the complete or partial sequences of the IFNARs of both species were obtained and analyzed. Small interference RNAs targeting wIFNAR1 and -2 specifically down-regulated the expression of wIFNAR1 and -2 and the IFN-stimulated gene MxA in a woodchuck cell line, respectively. IFNAR2 was significantly up-regulated in primary woodchuck hepatocytes stimulated with IFN-α or -γ. The expression of woodchuck IFNAR1 and -2 was decreased in woodchucks chronically infected with woodchuck hepatitis virus (WHV). These results are essential for studying type I IFN-related innate immunity and therapy in hepadnaviral infection in the woodchuck model.
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Zhou J, To KKW, Dong H, Cheng ZS, Lau CCY, Poon VKM, Fan YH, Song YQ, Tse H, Chan KH, Zheng BJ, Zhao GP, Yuen KY. A functional variation in CD55 increases the severity of 2009 pandemic H1N1 influenza A virus infection. J Infect Dis 2012; 206:495-503. [PMID: 22693232 DOI: 10.1093/infdis/jis378] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Infection due to 2009 pandemic H1N1 influenza A virus (A[H1N1]pdm09) is commonly manifested as mild infection but occasionally as severe pneumonia. We hypothesized that host genetic variations may contribute to disease severity. An initially small-scale genome-wide association study guided the selection of CD55 single-nucleotide polymorphisms in 425 Chinese patients with severe (n = 177) or mild (n = 248) disease. Carriers of rs2564978 genotype T/T were significantly associated with severe infection (odds ratio, 1.75; P = .011) under a recessive model, after adjustment for clinical confounders. An allele-specific effect on CD55 expression was revealed and ascribed to a promoter indel variation, which was in complete linkage disequilibrium with rs2564978. The promoter variant with deletion exhibited significantly lower transcriptional activity. We further demonstrated that CD55 can protect respiratory epithelial cells from complement attack. Additionally, A(H1N1)pdm09 infection promoted CD55 expression. In conclusion, CD55 polymorphisms are associated with severe A(H1N1)pdm09 infection. CD55 may exert a substantial impact on the disease severity of A(H1N1)pdm09 infection.
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Affiliation(s)
- Jie Zhou
- Department of Microbiology, The University of Hong Kong, Queen Mary Hospital, Pokfulam Rd, Pokfulam, Hong Kong Special Administrative Region, China
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Yan F, Gao YF, Lv F, Zhang TC, Li X, Yin HF. No association between IRF3 polymorphism and susceptibility to hepatitis B virus infection in Chinese patients. World J Gastroenterol 2012; 18:388-92. [PMID: 22294846 PMCID: PMC3261535 DOI: 10.3748/wjg.v18.i4.388] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2011] [Revised: 07/28/2011] [Accepted: 10/27/2011] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the association between three tag single nucleotide polymorphisms (tagSNPs) in interferon regulatory factors (IRF3) and the genetic susceptibility to chronic hepatitis B virus (HBV) infection.
METHODS: We performed a case-control study of 985 Chinese cases of chronic HBV infection and 294 self-limiting HBV-infected individuals as controls. Three tagSNPs in IRF3 (rs10415576, rs2304204, rs2304206) were genotyped with the Multiplex SNaPshot technique. The genotype and allele frequencies were calculated and analyzed.
RESULTS: The three SNPs showed no significant genotype/allele associations with chronic HBV infection. Overall allele P values were: rs10415576, P = 0.0908, odds ratio (OR) [95% confidence interval (CI)] = 1.1798 (0.9740-1.4291); rs2304204, P = 0.5959, OR (95% CI) = 1.0597 (0.8552-1.3133); rs2304206, P = 0.8372, OR (95% CI) = 1.0250 (0.8097-1.2976). Overall genotype P values were: rs10415576, P = 0.2106; rs2304204, P = 0.8458; rs2304206, P = 0.8315. There were no statistically significant differences between patients with chronic HBV infection and controls. Haplotypes generated by these three SNPs were also not significantly different between the two groups.
CONCLUSION: The three tagSNPs of IRF3 are not associated with HBV infection in the Han Chinese population.
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Børresen ML, Koch A, Biggar RJ, Andersson M, Wohlfahrt J, Ladefoged K, Melbye M. Hepatocellular carcinoma and other liver disease among Greenlanders chronically infected with hepatitis B virus: a population-based study. J Natl Cancer Inst 2011; 103:1676-85. [PMID: 22021665 DOI: 10.1093/jnci/djr405] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND In Greenland, the prevalence of hepatitis B surface antigen carriers, reflecting chronic hepatitis B virus (HBV) infection, is 5%-10%. However, the incidence of cirrhosis and hepatocellular carcinoma in this population has been reported to be low. We investigated this discrepancy in a large population-based cohort study. METHODS In total, 8879 Greenlanders (16% of the population) were recruited for population-based surveys performed from May 5 to July 7, 1987, and from November 1 to November 21, 1998, with follow-up until March 31, 2010. HBV status was based on serological testing, supplemented by data from all available HBV registries in Greenland to determine changes in HBV status over time. Information on morbidity and mortality was obtained from the Patient Discharge Registry, the Cancer Registry, and the Central Registration System. Sex, age, ethnicity, and period-adjusted incidence rate ratios (IRRs) were estimated using Poisson regression. World standardized rates were derived from these and World Health Organization data. RESULTS The 650 chronically HBV-infected persons had higher rates of hepatocellular carcinoma (adjusted IRR = 8.70; 95% CI = 2.06 to 36.7), liver disease (adjusted IRR = 5.73, 95% CI = 3.52 to 9.34), and all-cause mortality (adjusted IRR = 1.47; 95% CI = 1.21 to 1.79) than the 5160 HBV-negative persons. However, the world standardized incidence rates of hepatocellular carcinoma (38.5 cancers per 100 000 person-years) and cirrhosis (24 cases per 100 000 person-years) among chronically HBV-infected persons were low compared with results from population-based studies from countries with low, intermediate, and high rates of endemic HBV infection. CONCLUSION The relatively low incidence of hepatocellular carcinoma and other HBV-related morbidity among chronic HBV-infected persons in Greenland suggest a more benign course of HBV among the Greenlandic Inuit than in populations in other parts of the world.
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Affiliation(s)
- Malene L Børresen
- Department of Epidemiology Research, Statens Serum Institut, Ørestads Boulevard 5, Copenhagen, Denmark.
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Mbarek H, Ochi H, Urabe Y, Kumar V, Kubo M, Hosono N, Takahashi A, Kamatani Y, Miki D, Abe H, Tsunoda T, Kamatani N, Chayama K, Nakamura Y, Matsuda K. A genome-wide association study of chronic hepatitis B identified novel risk locus in a Japanese population. Hum Mol Genet 2011; 20:3884-92. [PMID: 21750111 DOI: 10.1093/hmg/ddr301] [Citation(s) in RCA: 178] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Hepatitis B virus (HBV) infection is a major health issue worldwide which may lead to hepatic dysfunction, liver cirrhosis and hepatocellular carcinoma. To identify host genetic factors that are associated with chronic hepatitis B (CHB) susceptibility, we previously conducted a two-stage genome-wide association study (GWAS) and identified the association of HLA-DP variants with CHB in Asians; however, only 179 cases and 934 controls were genotyped using genome-wide single nucleotide polymorphism (SNP) arrays. Here, we performed a second GWAS of 519 747 SNPs in 458 Japanese CHB cases and 2056 controls. After adjustment with the previously identified variants in the HLA-DP locus (rs9277535), we detected strong associations at 16 loci with P-value of <5 × 10(-5). We analyzed these loci in three independent Japanese cohorts (2209 CHB cases and 4440 controls) and found significant association of two SNPs (rs2856718 and rs7453920) within the HLA-DQ locus (overall P-value of 5.98 × 10(-28) and 3.99 × 10(-37)). Association of CHB with SNPs rs2856718 and rs7453920 remains significant even after stratification with rs3077 and rs9277535, indicating independent effect of HLA-DQ variants on CHB susceptibility (P-value of 1.52 × 10(-21)- 2.38 × 10(-30)). Subsequent analyses revealed DQA1*0102-DQB1*0604 and DQA1*0101-DQB1*0501 [odds ratios (OR) =0.16, and 0.39, respectively] as protective haplotypes and DQA1*0102-DQB1*0303 and DQA1*0301-DQB1*0601 (OR = 19.03 and 5.02, respectively) as risk haplotypes. These findings indicated that variants in antigen-binding regions of HLA-DP and HLA-DQ contribute to the risk of persistent HBV infection.
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Affiliation(s)
- Hamdi Mbarek
- Laboratory of Molecular Medicine, Human Genome Center, Institute of Medical Science, The University of Tokyo, 4-6-1 Shirokanedai, Minato, Tokyo
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Lv F, Gao YF, Zhang ZH, Zhang TC, Pan FM, Cui MF, Xia SL, Li X, Yin HF. Polymorphisms in programmed death-1 gene are not associated with chronic HBV infection in Chinese patients. World J Hepatol 2011; 3:72-8. [PMID: 21487538 PMCID: PMC3074088 DOI: 10.4254/wjh.v3.i3.72] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2010] [Revised: 12/23/2010] [Accepted: 12/30/2010] [Indexed: 02/06/2023] Open
Abstract
AIM To investigate the association between the programmed death-1(PD-1) polymorphisms and genetic susceptibility of chronic hepatitis B virus (HBV) infection in Chinese patients. METHODS Two single nucleotide polymorphisms (SNPs), PD-1.1 G > A and PD-1.2 G > A, were genotyped in 539 patients with chronic HBV infection and 353 other family members (HbsAg-) from 256 nuclear families using polymerase chain reactiorestriction fragment length polymorphisms assay. The associations between PD-1 polymorphisms and genetic susceptibility of chronic HBV infection were analyzed usng the family-based association analysis method. RESULTS No association or linkage was detected among 539 patients. Univariate (single-marker) family-based association tests demonstrated that PD-1 genotypes, alleles and transmitted haplotypes are not associated with chronic HBV infection (all with P value more than 0.05). Transmission/disequilibrium test and sibship disequilibrium test analysis showed no excess of the alleles from heterozygous parents to affected offspring (P = 0.688880, P = 1.000000 respectively). CONCLUSION The data demonstrated that PD-1.1 and PD-1.2 polymorphisms are not associated with chronic HBV infection in Chinese patients.
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Affiliation(s)
- Feng Lv
- Feng Lv, Yu-Feng Gao, Zhen-Huan Zhang, Ming-Fang Cui, Shu-Ling Xia, Xu Li, Hua-Fa Yin, Department of Infectious Diseases, the First Affiliated Hospital, Anhui Medical University, Hefei 230022, Anhui Province, China
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Miknis ZJ, Magracheva E, Li W, Zdanov A, Kotenko SV, Wlodawer A. Crystal structure of human interferon-λ1 in complex with its high-affinity receptor interferon-λR1. J Mol Biol 2010; 404:650-64. [PMID: 20934432 PMCID: PMC2991516 DOI: 10.1016/j.jmb.2010.09.068] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2010] [Revised: 09/29/2010] [Accepted: 09/30/2010] [Indexed: 01/29/2023]
Abstract
Interferon (IFN)-λ1 [also known as interleukin (IL)-29] belongs to the recently discovered group of type III IFNs. All type III IFNs initiate signaling processes through formation of specific heterodimeric receptor complexes consisting of IFN-λR1 and IL-10R2. We have determined the structure of human IFN-λ1 complexed with human IFN-λR1, a receptor unique to type III IFNs. The overall structure of IFN-λ1 is topologically similar to the structure of IL-10 and other members of the IL-10 family of cytokines. IFN-λR1 consists of two distinct domains having fibronectin type III topology. The ligand-receptor interface includes helix A, loop AB, and helix F on the IFN site, as well as loops primarily from the N-terminal domain and inter-domain hinge region of IFN-λR1. Composition and architecture of the interface that includes only a few direct hydrogen bonds support an idea that long-range ionic interactions between ligand and receptor govern the process of initial recognition of the molecules while hydrophobic interactions finalize it.
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Key Words
- cytokine
- crystallography
- antiviral
- immunity
- signaling
- ifn, interferon
- il, interleukin
- hcv, hepatitis c virus
- cmv, cytomegalovirus
- ebv, epstein–barr virus
- peg, polyethylene glycol
- pdb, protein data bank
- nag, n-acetylglucosamine
- sc, shape complementarity
- snp, single nucleotide polymorphism
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Affiliation(s)
- Zachary J. Miknis
- Macromolecular Crystallography Laboratory, NCI-Frederick, Frederick, MD 21702, USA
| | - Eugenia Magracheva
- Macromolecular Crystallography Laboratory, NCI-Frederick, Frederick, MD 21702, USA
- Basic Research Program, SAIC-Frederick, Frederick, MD 21702, USA
| | - Wei Li
- Department of Biochemistry and Molecular Biology, University Hospital Cancer Center, UMDNJ-New Jersey Medical School, Newark, NJ 07103, USA
| | - Alexander Zdanov
- Macromolecular Crystallography Laboratory, NCI-Frederick, Frederick, MD 21702, USA
| | - Sergei V. Kotenko
- Department of Biochemistry and Molecular Biology, University Hospital Cancer Center, UMDNJ-New Jersey Medical School, Newark, NJ 07103, USA
| | - Alexander Wlodawer
- Macromolecular Crystallography Laboratory, NCI-Frederick, Frederick, MD 21702, USA
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He XX, Chang Y, Jiang HJ, Tang F, Meng FY, Xie QH, Li PY, Song YH, Lin JS. Persistent effect of IFNAR-1 genetic polymorphism on the long-term pathogenesis of chronic HBV infection. Viral Immunol 2010; 23:251-7. [PMID: 20565290 DOI: 10.1089/vim.2009.0102] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Genetic polymorphism of IFNAR-1 plays a large role in determining the clearance or chronicity after hepatitis B virus (HBV) exposure. However, it is not clear whether type I interferon receptor-1 (IFNAR-1) variations continuously exert their effects to influence the final outcomes following HBV chronicity, including acute-on-chronic hepatitis B liver failure (ACLF-HBV), chronic hepatitis B (CHB), liver cirrhosis (LC), and hepatocellular carcinoma (HCC). Here we report that these four potential outcomes of chronic HBV infection are strongly associated with IFNAR-1 polymorphisms through a hospital-based case-control study of 663 cases. ACLF-HBV and HCC were each compared with CHB+LC. In comparison with the G/G genotype, the C/G and C/C genotypes at both single-nucleotide polymorphism (SNP) sites (rs1012335 and rs2257167) showed significant susceptibility to ACLF-HBV (the highest odds ratio [OR] reached 2.374; 95% CI = 1.488, 3.788; p < 0.001 for the C/G genotype at rs2257167), as well as HCC (OR = 2.475; 95% CI = 1.435, 4.426; p < 0.001 for the C/C genotype at rs1012335). The C allele at both loci was a susceptibility allele for ACLF-HBV and HCC, with the highest ORs reaching 1.653 (95% CI = 1.233, 2.216; p < 0.01 at rs1012335) in the ACLF-HBV group, and 1.659 (95% CI = 1.274, 2.159; p < 0.01 at rs1012335) in the HCC group. A strongly linked disequilibrium was also found within these two alleles (p < 0.001). Our research indicates that genetic polymorphisms of IFNAR-1 not only contribute to the determination of clearance or chronicity in the early stages of HBV exposure, but they also persistently influence pathogenesis over the long-term process of chronic HBV infection.
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Affiliation(s)
- Xing-Xing He
- Institute of Liver Diseases, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Ait-goughoulte M, Lucifora J, Zoulim F, Durantel D. Innate antiviral immune responses to hepatitis B virus. Viruses 2010; 2:1394-1410. [PMID: 21994686 PMCID: PMC3185716 DOI: 10.3390/v2071394] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2010] [Revised: 06/22/2010] [Accepted: 07/01/2010] [Indexed: 02/06/2023] Open
Abstract
Hepatitis B virus (HBV) is a major cause of acute and chronic hepatitis in humans. As HBV itself is currently viewed as a non-cytopathic virus, the liver pathology associated with hepatitis B is mainly thought to be due to immune responses directed against HBV antigens. The outcome of HBV infection is the result of complex interactions between replicating HBV and the immune system. While the role of the adaptive immune response in the resolution of HBV infection is well understood, the contribution of innate immune mechanisms remains to be clearly defined. The innate immune system represents the first line of defense against viral infection, but its role has been difficult to analyze in humans due to late diagnosis of HBV infection. In this review, we discuss recent advances in the field of innate immunity to HBV infection.
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Affiliation(s)
- Malika Ait-goughoulte
- INSERM, U871, Molecular Physiopathology and New Treatment of Viral Hepatitis, 151 Cours Albert Thomas, 69003 Lyon, France; E-Mails: (M.A.-g.); (J.L.); (F.Z.)
- Université de Lyon, UCBL, and IFR62 Lyon Est, 69008 Lyon, France
| | - Julie Lucifora
- INSERM, U871, Molecular Physiopathology and New Treatment of Viral Hepatitis, 151 Cours Albert Thomas, 69003 Lyon, France; E-Mails: (M.A.-g.); (J.L.); (F.Z.)
- Université de Lyon, UCBL, and IFR62 Lyon Est, 69008 Lyon, France
| | - Fabien Zoulim
- INSERM, U871, Molecular Physiopathology and New Treatment of Viral Hepatitis, 151 Cours Albert Thomas, 69003 Lyon, France; E-Mails: (M.A.-g.); (J.L.); (F.Z.)
- Université de Lyon, UCBL, and IFR62 Lyon Est, 69008 Lyon, France
- Hospices Civils de Lyon (HCL), Hôtel Dieu Hospital, 69002 Lyon, France
| | - David Durantel
- INSERM, U871, Molecular Physiopathology and New Treatment of Viral Hepatitis, 151 Cours Albert Thomas, 69003 Lyon, France; E-Mails: (M.A.-g.); (J.L.); (F.Z.)
- Université de Lyon, UCBL, and IFR62 Lyon Est, 69008 Lyon, France
- Hospices Civils de Lyon (HCL), Hôtel Dieu Hospital, 69002 Lyon, France
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +33-472-681-970; Fax: +33-472-681-971
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Chen DQ, Zeng Y, Zhou J, Yang L, Jiang S, Huang JD, Lu L, Zheng BJ. Association of candidate susceptible loci with chronic infection with hepatitis B virus in a Chinese population. J Med Virol 2010; 82:371-8. [PMID: 20087947 DOI: 10.1002/jmv.21716] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A number of genetic loci have been proposed to be associated with persistent hepatitis B virus (HBV) infection. This study aimed to evaluate the association and interaction of susceptible genes with HBV persistence in a Chinese population. A total of 17 polymorphisms in 9 candidate genes were studied in 361 Chinese chronic hepatitis B patients and 304 patients who recovered spontaneously. Distributions of susceptible polymorphisms were examined in healthy Chinese and Caucasian populations. Gene-gene interactions were tested by the multifactor dimensionality reduction (MDR) method. The TNF -308 G/G genotype and G allele, IL-10RB codon 47 A allele, and MCP-1 -2518 G/G genotype and G allele were more frequent in patients than controls (P < 0.01, after multiple corrections Pc < 0.05), while the frequencies of TNF -308 A/G genotype and IL-10 -592 A/A genotype were significantly higher in controls than in the patient group (Pc < 0.05). The frequencies of the risk allele MCP-1 -2518 G and CTLA4 6230 G were much higher in Chinese than in the Caucasian groups (P < 0.001). An interaction between CCR5 -2459, TNFA -863, IL-10RB codon 47, and MCP-1 -2518 was detected by MDR (P = 0.001). The results indicate that genetic determinants may affect the outcome of HBV infection in both independent and synergic manners. J. Med. Virol. 82:371-378, 2010. (c) 2010 Wiley-Liss, Inc.
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Affiliation(s)
- Ding-Qiang Chen
- Department of Microbiology, The University of Hong Kong, Hong Kong SAR, China
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Magracheva E, Pletnev S, Kotenko S, Li W, Wlodawer A, Zdanov A. Purification, crystallization and preliminary crystallographic studies of the complex of interferon-lambda1 with its receptor. Acta Crystallogr Sect F Struct Biol Cryst Commun 2010; 66:61-3. [PMID: 20057073 PMCID: PMC2805539 DOI: 10.1107/s1744309109048817] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2009] [Accepted: 11/16/2009] [Indexed: 12/16/2023]
Abstract
Human interferon-lambda1 (IFN-lambda1(Ins)) and the extracellular domain of interferon-lambda1 receptor (IFN-lambda1R1) were expressed in Drosophila S2 cells and purified to homogeneity. Both IFN-lambda1(Ins) and interferon-lambda1 produced from Escherichia coli (IFN-lambda1(Bac)) were coupled with IFN-lambda1R1 at room temperature and the complexes were purified by gel filtration. Both complexes were crystallized; the crystals were flash-frozen at 100 K and diffraction data were collected to 2.16 and 2.1 A, respectively. Although the IFN-lambda1(Bac)-IFN-lambda1R1 and IFN-lambda1(Ins)-IFN-lambda1R1 complexes differed only in the nature of the expression system used for the ligand, their crystallization conditions and crystal forms were quite different. A search for heavy-atom derivatives as well as molecular-replacement trials are in progress.
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Affiliation(s)
| | - Sergei Pletnev
- SAIC-Frederick Inc., Basic Research Program, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439, USA
| | - Sergei Kotenko
- Department of Biochemistry and Molecular Biology, UMDNJ–New Jersey Medical School, Newark, New Jersey 07103, USA
| | - Wei Li
- Department of Biochemistry and Molecular Biology, UMDNJ–New Jersey Medical School, Newark, New Jersey 07103, USA
| | - Alexander Wlodawer
- Macromolecular Crystallography Laboratory, NCI-Frederick, Frederick, MD 21702, USA
| | - Alexander Zdanov
- Macromolecular Crystallography Laboratory, NCI-Frederick, Frederick, MD 21702, USA
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Durantel D, Zoulim F. Innate response to hepatitis B virus infection: observations challenging the concept of a stealth virus. Hepatology 2009; 50:1692-5. [PMID: 19937686 DOI: 10.1002/hep.23361] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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29
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Gong QM, Kong XF, Yang ZT, Xu J, Wang L, Li XH, Jin GD, Gao J, Zhang DH, Jiang JH, Lu ZM, Zhang XX. Association study of IFNAR2 and IL10RB genes with the susceptibility and interferon response in HBV infection. J Viral Hepat 2009; 16:674-80. [PMID: 19714778 DOI: 10.1111/j.1365-2893.2009.01130.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
A recent genome-wide association study discovered that two polymorphisms, interferon (IFN) alpha receptor 2 (IFNAR-2) F8S and interleukin 10 receptor (IL10RB) K47E, were associated with susceptibility to hepatitis B virus (HBV) infection in Africa. Here, we reevaluate the effects of the two polymorphisms on HBV susceptibility in the Chinese Han population, and extended the study to look at their association with IFN response in chronic hepatitis B (CHB). We included 341 patients with CHB and 341 unrelated controls presenting with asymptotic HBV self-limited infection, who were well matched in age and sex. In the CHB group, 101 patients had been treated with peg-IFN-alpha-2a for 48 weeks and followed up for 24 weeks to determine the clinical response, resulting 34 individuals with sustained virological response (SVR) and 67 individuals with nonsustained response (NR). Subgroups in the CHB group were divided according to the viral loads, HBeAg and maternal HBsAg status. The association with the susceptibility to HBV infection was only observed for IL10RB K47E when we compared the individuals with persistent HBV infection through nonmaternal transmission to the controls with asymptomatic self-limited HBV infection. Further, we found that the IFNAR2-8SS genotype was associated with HBeAg negative patients (OR = 0.316, 95% CI: 0.121-0.825, P = 0.019) and that the IFNAR2-8F allele was associated with the risk to high viral loads (OR = 1.667, 95% CI: 1.148-2.420, P = 0.007). In addition, the IFNAR2-8FF genotype predisposed to higher MxA gene induction and correlated with sustained IFN response (OR = 0.348, 95% CI: 0.129-0.935, P = 0.036). Haplotype analysis based on polymorphisms of three single-nucleotide polymorphisms, MxA - 88 G/T, IFNAR-2 F8S and IL10RB K47E showed that the haplotype distribution was significantly different between the SVR and NR groups (P = 0.040). This study suggests that IFNAR2 may play an important role in determining IFN response and clinical phenotypes of HBV infection in the Chinese Han population.
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Affiliation(s)
- Q-M Gong
- Department of Infectious Diseases, School of Medicine, Shanghai Jiaotong University, Ruijin Hospital, Shanghai, China
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Functional dissection of an IFN-alpha/beta receptor 1 promoter variant that confers higher risk to chronic hepatitis B virus infection. J Hepatol 2009; 51:322-32. [PMID: 19501422 DOI: 10.1016/j.jhep.2009.03.020] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2008] [Revised: 02/02/2009] [Accepted: 03/10/2009] [Indexed: 12/04/2022]
Abstract
BACKGROUND/AIMS We previously demonstrated that two linked single nucleotide polymorphisms (SNPs) at -408 and -3 of type I interferon receptor 1 (IFNAR1) promoter are associated with susceptibility to chronic HBV infection. We aimed to elucidate the mechanism by which -3 and/or -408 C/T SNPs had such profound effects. METHODS A functional SNP in IFNAR1 promoter was defined by reporter gene assay, mutational analysis, flow cytometry analysis and gel shift assay. The nuclear protein binding to the essential polymorphic site was identified and its effect on transcriptional regulation of IFNAR1 was further demonstrated in a series of ex vivo and in vivo experiments. RESULTS We found C>T change at the -3 locus reduced the transcriptional activity of IFNAR1 promoter. High mobility group B protein 1 (HMGB1) and PARP-1 were co-recruited to the IFNAR1 promoter to regulate its transcription. We demonstrated HMGB1-binding affinity to IFNAR1 promoter was reduced in the -3T variant. Additionally, PARP-1, a cofactor for IFNAR1 transcription activation, was significantly suppressed by HBV. CONCLUSION Upon HBV infection, decreased binding affinity of HMGB1 to the IFNAR1 promoter -3T variant is aggravated by the suppressed PARP-1 expression caused by HBV, resulting in a further attenuated IFNAR1 expression. This compromises the antiviral and immuno-regulatory effects of IFN-alpha/beta, which may in turn affect the clinical outcome of HBV infection.
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Zhou J, Chen DQ, Poon VKM, Zeng Y, Ng F, Lu L, Huang JD, Yuen KY, Zheng BJ. A regulatory polymorphism in interferon-gamma receptor 1 promoter is associated with the susceptibility to chronic hepatitis B virus infection. Immunogenetics 2009; 61:423-30. [PMID: 19488747 DOI: 10.1007/s00251-009-0377-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2009] [Accepted: 05/20/2009] [Indexed: 12/19/2022]
Abstract
The antiviral cascade triggered by interferon-gamma (IFN-gamma) represents a vital event for eradicating hepatitis B virus (HBV) in experimental animals. IFN-gamma signaling is mediated through the ligand binding to IFN-gamma receptor 1 (IFNGR1). Control of IFNGR1 expression level is one of the mechanisms by which cells modulate the potency of IFN-gamma signaling. In this study, we comprehensively investigated the single nucleotide polymorphisms (SNPs) in IFNGR1 gene and correlated their occurrence to susceptibility to HBV infection in a Chinese population. A total of 983 participants, including 361 chronic hepatitis B patients, 256 individuals who had spontaneously recovered from HBV infection, and 366 healthy control subjects, were enrolled in the study. Polymerase chain reaction-restriction fragment length polymorphism was used to identify seven SNPs (-611A/G, -56C/T, 40G/A, 95C/T, 130A/G, 20685A/G, 21227T/C) in IFNGR1 gene. We found that -56C and -56T allele were associated with viral clearance and viral persistence, respectively (P = 0.014). In a reporter-driven assay, we validated that the promoter variant with -56C exhibited a higher transcription level than that with -56T in HepG2 cells in a cell-type-specific pattern. We conclude that a functional -56C/T SNP in IFNGR1 promoter is associated with the clinical outcome of HBV infection in this Chinese population.
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Affiliation(s)
- Jie Zhou
- Department of Microbiology, The University of Hong Kong, Pokfulam, Hong Kong, Hong Kong SAR, China
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Zhou J, Smith DK, Lu L, Poon VKM, Ng F, Chen DQ, Huang JD, Yuen KY, Cao KY, Zheng BJ. A non-synonymous single nucleotide polymorphism in IFNAR1 affects susceptibility to chronic hepatitis B virus infection. J Viral Hepat 2009; 16:45-52. [PMID: 18761606 DOI: 10.1111/j.1365-2893.2008.01040.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The type I interferon (IFN-alpha/beta) receptor 1 (IFNAR1) mediates the potent antiviral and immuno-regulatory effects of IFN-alpha/beta that are believed to be pivotal to eradicate hepatitis B virus (HBV) infection. IFNAR1 promoter polymorphisms (at -568/-77) have been shown to be associated with susceptibility to chronic HBV infection; however, whether these markers are genetic determinants of HBV infection remains unknown. The functional significance of promoter -568/-77 polymorphisms was assessed by mutagenesis and luciferase assays. Sequencing and restriction fragment length polymorphisms in 328 chronic HBV patients, 130 spontaneous resolvers and 148 healthy blood donors identified other polymorphism at IFNAR1 open reading frame. IFNAR1 expression levels in peripheral blood cells were detected by flow cytometry. We found that the -568/-77 promoter variants were unlikely to affect transcription levels. A C/G single nucleotide polymorphism, in strong linkage disequilibrium with the promoter polymorphisms, was found in the coding sequence of IFNAR1 (nt19158). This resulted in a nonsynonymous substitution in the extracellular region of IFNAR1 protein and correlated with susceptibility to chronic HBV infection. Bioinformatic analysis suggested decreased stability of the IFNAR1 protein. Chronic HBV patients with the 19158C/C genotype (Leu141) exhibited higher IFNAR1 protein expression levels in peripheral blood monocytes than those with the 19158G/G genotype (Val141). In conclusion, IFNAR1 19158C/G polymorphism is primarily associated with susceptibility to chronic HBV infection.
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Affiliation(s)
- J Zhou
- Department of Microbiology, The University of Hong Kong, Hong Kong, China
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Yang ZT, Zhang XX, Kong XF, Zhang DH, Zhang SY, Jiang JH, Gong QM, Jin GD, Lu ZM. Polymorphisms of microsomal triglyceride transfer protein in different hepatitis B virus-infected patients. World J Gastroenterol 2008; 14:5454-60. [PMID: 18803359 PMCID: PMC2744166 DOI: 10.3748/wjg.14.5454] [Citation(s) in RCA: 5] [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] [Indexed: 02/06/2023] Open
Abstract
AIM: To identify the two polymorphisms of microsomal triglyceride transfer protein (MTP) gene in the Chinese population and to explore their correlation with both hepatitis B virus (HBV) self-limited infection and persistent infection.
METHODS: A total of 316 subjects with self-limited HBV infection and 316 patients with persistent HBV infection (195 subjects without familial history), matched with age and sex, from the Chinese Han population were enrolled in this study. Polymorphisms of MTP at the promoter region -493 and at H297Q were determined by the allele specific polymerase chain reaction (PCR).
RESULTS: The ratio of males to females was 2.13:1 for each group and the average age in the self-limited and chronic infection groups was 38.36 and 38.28 years, respectively. None of the allelic distributions deviated significantly from that predicted by the Hardy-Weinberg equilibrium. There was a linkage disequilibrium between H297Q and -493G/T (D’ = 0.77). As the χ2 test was used, the genotype distribution of MTP-493G/T demonstrated a significant difference between the self-limited infection group and the entire chronic group or the chronic patients with no family history (χ2 = 8.543, P = 0.015 and χ2 = 7.199, P = 0.019). The allele distribution at the MTP-493 position also demonstrated a significant difference between the study groups without family history (χ2 = 6.212, P = 0.013). The T allele emerged as a possible protective factor which may influence the outcomes of HBV infection (OR: 0.59; 95% CI: 0.389-0.897).
CONCLUSION: The polymorphism of the MTP gene, T allele at -493, may be involved in determining the HBV infection outcomes, of which the mechanism needs to be further investigated.
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