1
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Virological Treatment Monitoring for Chronic Hepatitis B. Viruses 2022; 14:v14071376. [PMID: 35891357 PMCID: PMC9319170 DOI: 10.3390/v14071376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 06/07/2022] [Accepted: 06/16/2022] [Indexed: 11/16/2022] Open
Abstract
More than 250 million people worldwide are currently infected with hepatitis B, despite the effectiveness of vaccination and other preventive measures. In terms of treatment, new therapeutic approaches are rapidly developing, promising to achieve the elimination of infected cells and the complete cure of infection. The on-treatment monitoring of these innovative antiviral treatments will require the implementation of new virological tools. Therefore, new biomarkers are being evaluated besides the traditional virological and serological assays in order to obtain information on different steps of the viral replication cycle and to monitor response to therapy more accurately. The purpose of this work is to describe both standard and innovative tools for chronic hepatitis B treatment monitoring, and to analyse their potential and feasibility.
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2
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Goyal A, Duke ER, Cardozo-Ojeda EF, Schiffer JT. Modeling explains prolonged SARS-CoV-2 nasal shedding relative to lung shedding in remdesivir treated rhesus macaques. iScience 2022; 25:104448. [PMID: 35634576 PMCID: PMC9130309 DOI: 10.1016/j.isci.2022.104448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 04/19/2022] [Accepted: 05/16/2022] [Indexed: 12/12/2022] Open
Abstract
In clinical trials, remdesivir decreased recovery time in hospitalized patients with SARS- CoV-2 and prevented hospitalization when given early during infection, despite not reducing nasal viral loads. In rhesus macaques, early remdesivir prevented pneumonia and lowered lung viral loads, but viral loads increased in nasal passages after five days. We developed mathematical models to explain these results. Our model raises the hypotheses that: 1) in contrast to nasal passages viral load monotonically decreases in lungs during therapy because of infection-dependent generation of refractory cells, 2) slight reduction in lung viral loads with an imperfect agent may result in a substantial decrease in lung damage, and 3) increases in nasal viral load may occur due to a blunting of peak viral load which decreases the intensity of the innate immune response. We demonstrate that a higher potency drug could lower viral loads in nasal passages and lung.
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Affiliation(s)
- Ashish Goyal
- Vaccine and Infectious Diseases Division, Fred Hutchinson Cancer Research Center
| | - Elizabeth R Duke
- Vaccine and Infectious Diseases Division, Fred Hutchinson Cancer Research Center.,Department of Medicine, University of Washington, Seattle
| | | | - Joshua T Schiffer
- Vaccine and Infectious Diseases Division, Fred Hutchinson Cancer Research Center.,Department of Medicine, University of Washington, Seattle.,Clinical Research Division, Fred Hutchinson Cancer Research Center
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3
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Higuera-de-la-Tijera F, Castro-Narro GE, Velarde-Ruiz Velasco JA, Cerda-Reyes E, Moreno-Alcántar R, Aiza-Haddad I, Castillo-Barradas M, Cisneros-Garza LE, Dehesa-Violante M, Flores-Calderón J, González-Huezo MS, Márquez-Guillén E, Muñóz-Espinosa LE, Pérez-Hernández JL, Ramos-Gómez MV, Sierra-Madero J, Sánchez-Ávila JF, Torre-Delgadillo A, Torres R, Marín-López ER, Kershenobich D, Wolpert-Barraza E. Asociación Mexicana de Hepatología A.C. Clinical guideline on hepatitis B. REVISTA DE GASTROENTEROLOGIA DE MEXICO (ENGLISH) 2021; 86:403-432. [PMID: 34483073 DOI: 10.1016/j.rgmxen.2021.04.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Accepted: 04/14/2021] [Indexed: 12/24/2022]
Abstract
Hepatitis B virus (HBV) infection continues to be a worldwide public health problem. In Mexico, at least three million adults are estimated to have acquired hepatitis B (total hepatitis B core antibody [anti-HBc]-positive), and of those, 300,000 active carriers (hepatitis B surface antigen [HBsAg]-positive) could require treatment. Because HBV is preventable through vaccination, its universal application should be emphasized. HBV infection is a major risk factor for developing hepatocellular carcinoma. Semi-annual liver ultrasound and serum alpha-fetoprotein testing favor early detection of that cancer and should be carried out in all patients with chronic HBV infection, regardless of the presence of advanced fibrosis or cirrhosis. Currently, nucleoside/nucleotide analogues that have a high barrier to resistance are the first-line therapies.
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Affiliation(s)
- F Higuera-de-la-Tijera
- Departamento de Gastroenterología, Hospital General de México "Dr. Eduardo Liceaga", Mexico City, Mexico
| | - G E Castro-Narro
- Departamento de Gastroenterología, Instituto Nacional de Ciencias Médicas y Nutrición "Salvador Zubirán", Mexico City, Mexico.
| | - J A Velarde-Ruiz Velasco
- Departamento de Gastroenterología, Hospital Civil de Guadalajara "Fray Antonio Alcalde", Guadalajara, Jalisco, Mexico
| | - E Cerda-Reyes
- Departamento de Gastroenterología, Hospital Central Militar, Mexico City, Mexico
| | - R Moreno-Alcántar
- Departamento de Gastroenterología, Hospital de Especialidades del Centro Médico Nacional Siglo XXI, IMSS, Mexico City, Mexico
| | - I Aiza-Haddad
- Clínica de Enfermedades Hepáticas, Hospital Ángeles Lomas, Mexico City, Mexico
| | - M Castillo-Barradas
- Departamento de Gastroenterología, Hospital de Especialidades del Centro Médico Nacional "La Raza", IMSS, Mexico City, Mexico
| | - L E Cisneros-Garza
- Centro de Enfermedades Hepáticas, Hospital San José, Nuevo León, Monterrey, Mexico
| | - M Dehesa-Violante
- Fundación Mexicana para la Salud Hepática A.C. (FUNDHEPA), Mexico City, Mexico
| | - J Flores-Calderón
- Departamento de Gastroenterología, Hospital de Pediatría del Centro Médico Nacional Siglo XXI, IMSS, Mexico City, Mexico
| | - M S González-Huezo
- Servicio de Gastroenterología y Endoscopia Gastrointestinal, ISSSEMYM, Metepec, Estado de México, Mexico
| | - E Márquez-Guillén
- Departamento de Gastroenterología, Instituto Nacional de Ciencias Médicas y Nutrición "Salvador Zubirán", Mexico City, Mexico
| | - L E Muñóz-Espinosa
- Clínica de Hígado, Departamento de Medicina Interna, Hospital Universitario "Dr. José E. González", Universidad Autónoma de Nuevo León, Monterrey, Nuevo León, Mexico
| | - J L Pérez-Hernández
- Departamento de Gastroenterología, Hospital General de México "Dr. Eduardo Liceaga", Mexico City, Mexico
| | - M V Ramos-Gómez
- Departamento de Gastroenterología, Centro Médico Nacional "20 de Noviembre", ISSSTE, Mexico City, Mexico
| | - J Sierra-Madero
- Departamento de Gastroenterología, Instituto Nacional de Ciencias Médicas y Nutrición "Salvador Zubirán", Mexico City, Mexico
| | - J F Sánchez-Ávila
- Tecnológico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Mexico City, Mexico
| | - A Torre-Delgadillo
- Departamento de Gastroenterología, Instituto Nacional de Ciencias Médicas y Nutrición "Salvador Zubirán", Mexico City, Mexico
| | - R Torres
- Hospital de Infectología del Centro Médico Nacional "La Raza", IMSS, Mexico City, Mexico
| | | | - D Kershenobich
- Departamento de Gastroenterología, Instituto Nacional de Ciencias Médicas y Nutrición "Salvador Zubirán", Mexico City, Mexico
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4
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Ohsaki E, Suwanmanee Y, Ueda K. Chronic Hepatitis B Treatment Strategies Using Polymerase Inhibitor-Based Combination Therapy. Viruses 2021; 13:v13091691. [PMID: 34578273 PMCID: PMC8473100 DOI: 10.3390/v13091691] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 08/19/2021] [Accepted: 08/25/2021] [Indexed: 12/12/2022] Open
Abstract
Viral polymerase is an essential enzyme for the amplification of the viral genome and is one of the major targets of antiviral therapies. However, a serious concern to be solved in hepatitis B virus (HBV) infection is the difficulty of eliminating covalently closed circular (ccc) DNA. More recently, therapeutic strategies targeting various stages of the HBV lifecycle have been attempted. Although cccDNA-targeted therapies are attractive, there are still many problems to be overcome, and the development of novel polymerase inhibitors remains an important issue. Interferons and nucleos(t)ide reverse transcriptase inhibitors (NRTIs) are the only therapeutic options currently available for HBV infection. Many studies have reported that the combination of interferons and NRTI causes the loss of hepatitis B surface antigen (HBsAg), which is suggestive of seroconversion. Although NRTIs do not directly target cccDNA, they can strongly reduce the serum viral DNA load and could suppress the recycling step of cccDNA formation, improve liver fibrosis/cirrhosis, and reduce the risk of hepatocellular carcinoma. Here, we review recent studies on combination therapies using polymerase inhibitors and discuss the future directions of therapeutic strategies for HBV infection.
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5
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Higuera-de-la-Tijera F, Castro-Narro GE, Velarde-Ruiz Velasco JA, Cerda-Reyes E, Moreno-Alcántar R, Aiza-Haddad I, Castillo-Barradas M, Cisneros-Garza LE, Dehesa-Violante M, Flores-Calderón J, González-Huezo MS, Márquez-Guillén E, Muñóz-Espinosa LE, Pérez-Hernández JL, Ramos-Gómez MV, Sierra-Madero J, Sánchez-Ávila JF, Torre-Delgadillo A, Torres R, Marín-López ER, Kershenobich D, Wolpert-Barraza E. Asociación Mexicana de Hepatología A.C. Clinical guideline on hepatitis B. REVISTA DE GASTROENTEROLOGIA DE MEXICO (ENGLISH) 2021; 86:S0375-0906(21)00061-6. [PMID: 34384668 DOI: 10.1016/j.rgmx.2021.04.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 04/11/2021] [Accepted: 04/14/2021] [Indexed: 02/07/2023]
Abstract
Hepatitis B virus (HBV) infection continues to be a worldwide public health problem. In Mexico, at least three million adults are estimated to have acquired hepatitis B (total hepatitis B core antibody [anti-HBc]-positive), and of those, 300,000 active carriers (hepatitis B surface antigen [HBsAg]-positive) could require treatment. Because HBV is preventable through vaccination, its universal application should be emphasized. HBV infection is a major risk factor for developing hepatocellular carcinoma. Semi-annual liver ultrasound and serum alpha-fetoprotein testing favor early detection of that cancer and should be carried out in all patients with chronic HBV infection, regardless of the presence of advanced fibrosis or cirrhosis. Currently, nucleoside/nucleotide analogues that have a high barrier to resistance are the first-line therapies.
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Affiliation(s)
- F Higuera-de-la-Tijera
- Departamento de Gastroenterología, Hospital General de México «Dr. Eduardo Liceaga», Ciudad de México, México
| | - G E Castro-Narro
- Departamento de Gastroenterología, Instituto Nacional de Ciencias Médicas y Nutrición «Salvador Zubirán», Ciudad de México, México.
| | - J A Velarde-Ruiz Velasco
- Departamento de Gastroenterología, Hospital Civil de Guadalajara «Fray Antonio Alcalde», Guadalajara, Jalisco, México
| | - E Cerda-Reyes
- Departamento de Gastroenterología, Hospital Central Militar, Ciudad de México, México
| | - R Moreno-Alcántar
- Departamento de Gastroenterología, Hospital de Especialidades del Centro Médico Nacional Siglo XXI, IMSS, Ciudad de México, México
| | - I Aiza-Haddad
- Clínica de Enfermedades Hepáticas, Hospital Ángeles Lomas, Ciudad de México, México
| | - M Castillo-Barradas
- Departamento de Gastroenterología, Hospital de Especialidades del Centro Médico Nacional «La Raza», IMSS, Ciudad de México, México
| | - L E Cisneros-Garza
- Centro de Enfermedades Hepáticas, Hospital San José, Nuevo León, Monterrey, México
| | - M Dehesa-Violante
- Fundación Mexicana para la Salud Hepática A.C. (FUNDHEPA), Ciudad de México, México
| | - J Flores-Calderón
- Departamento de Gastroenterología, Hospital de Pediatría del Centro Médico Nacional Siglo XXI, IMSS, Ciudad de México, México
| | - M S González-Huezo
- Servicio de Gastroenterología y Endoscopia Gastrointestinal, ISSSEMYM, Metepec, Estado de México, México
| | - E Márquez-Guillén
- Departamento de Gastroenterología, Instituto Nacional de Ciencias Médicas y Nutrición «Salvador Zubirán», Ciudad de México, México
| | - L E Muñóz-Espinosa
- Clínica de Hígado, Departamento de Medicina Interna, Hospital Universitario «Dr. José E. González», Universidad Autónoma de Nuevo León, Monterrey, Nuevo León, México
| | - J L Pérez-Hernández
- Departamento de Gastroenterología, Hospital General de México «Dr. Eduardo Liceaga», Ciudad de México, México
| | - M V Ramos-Gómez
- Departamento de Gastroenterología, Centro Médico Nacional «20 de Noviembre», ISSSTE, Ciudad de México, México
| | - J Sierra-Madero
- Departamento de Gastroenterología, Instituto Nacional de Ciencias Médicas y Nutrición «Salvador Zubirán», Ciudad de México, México
| | - J F Sánchez-Ávila
- Tecnológico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Ciudad de México, México
| | - A Torre-Delgadillo
- Departamento de Gastroenterología, Instituto Nacional de Ciencias Médicas y Nutrición «Salvador Zubirán», Ciudad de México, México
| | - R Torres
- Hospital de Infectología del Centro Médico Nacional «La Raza», IMSS, Ciudad de México, México
| | | | - D Kershenobich
- Departamento de Gastroenterología, Instituto Nacional de Ciencias Médicas y Nutrición «Salvador Zubirán», Ciudad de México, México
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6
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Bassit L, Ono SK, Schinazi RF. Moving Fast Toward Hepatitis B Virus Elimination. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1322:115-138. [PMID: 34258739 DOI: 10.1007/978-981-16-0267-2_5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Currently, there are two safe and effective therapeutic strategies for chronic hepatitis B treatment, namely, nucleoside analogs and interferon alpha (pegylated or non-pegylated). These treatments can control viral replication and improve survival; however, they do not eliminate the virus and therefore require long-term continued therapy. In addition, there are significant concerns about virus rebound on discontinuation of therapy and the development of fibrosis and hepatocellular carcinoma despite therapy. Therefore, the search for new, more effective, and safer antiviral agents that can cure hepatitis B virus (HBV) continues. Anti-HBV drug discovery and development is fundamentally impacted by our current understanding of HBV replication, disease physiopathology, and persistence of HBV covalently closed circular DNA (cccDNA). Several HBV replication targets are the basis for novel anti-HBV drug development strategies. Many of them are already in clinical trial phase 1 or 2, while others with promising results are still in preclinical stages. As research intensifies, potential HBV curative therapies and modalities in the pipeline are now on the horizon.
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Affiliation(s)
- Leda Bassit
- Center for AIDS Research, Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine, and Children's Healthcare of Atlanta, Atlanta, GA, USA
| | - Suzane Kioko Ono
- Department of Gastroenterology, University of Sao Paulo School of Medicine, Sao Paulo, SP, Brazil
| | - Raymond F Schinazi
- Center for AIDS Research, Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine, and Children's Healthcare of Atlanta, Atlanta, GA, USA.
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7
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Block TM, Young JAT, Javanbakht H, Sofia MJ, Zhou T. Host RNA quality control as a hepatitis B antiviral target. Antiviral Res 2020; 186:104972. [PMID: 33242518 DOI: 10.1016/j.antiviral.2020.104972] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 10/30/2020] [Accepted: 11/03/2020] [Indexed: 12/12/2022]
Abstract
Inhibition of the host RNA polyadenylating polymerases, PAPD5 and PAPD7 (PAPD5/7), with dihydroquinolizinone, a small orally available, molecule, results in a rapid and selective degradation of hepatitis B virus (HBV) RNA, and hence reduction in the amounts of viral gene products. DHQ, is a first in class investigational agent and could represent an entirely new category of HBV antivirals. PAPD5 and PAPD7 are non-canonical, cell specified, polyadenylating polymerases, also called terminal nucleotidyl transferases 4B and 4A (TENT4B/A), respectively. They are involved in the degradation of poor-quality cell transcripts, mostly non-coding RNAs and in the maturation of a sub-set of transcripts. They also appear to play a role in shielding some mRNA from degradation. The results of studies with DHQ, along with other recent findings, provide evidence that repression of the PAPD5/7 arm of the cell "RNA quality control" pathway, causes a profound (multi-fold) reduction rather than increase, in the amount of HBV pre-genomic, pre-core and HBsAg mRNA levels in tissue culture and animal models, as well. In this review we will briefly discuss the need for new HBV therapeutics and provide background about HBV transcription. We also discuss cellular degradation of host transcripts, as it relates to a new family of anti-HBV drugs that interfere with these processes. Finally, since HBV mRNA maturation appears to be selectively sensitive to PAPD5/7 inhibition in hepatocytes, we discuss the possibility of targeting host RNA "quality control" as an antiviral strategy.
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Affiliation(s)
| | - John A T Young
- Roche Pharma Research & Early Development, Roche Innovation Center Basel, F.Hoffmann-La Roche Ltd, Basel, Switzerland.
| | - Hassan Javanbakht
- SQZ Biotechnologies, 200 Arsenal Yards Blvd, Suite 210, Watertown, MA, 02472, USA.
| | - Michael J Sofia
- Arbutus Biopharma, Inc, 701 Veterans Circle, Warminster, PA, 18974, USA.
| | - Tianlun Zhou
- Baruch S. Blumberg Institute, Doylestown, PA, 18902, USA.
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8
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Expression Level of Small Envelope Protein in Addition to Sequence Divergence inside Its Major Hydrophilic Region Contributes to More Efficient Surface Antigen Secretion by Hepatitis B Virus Subgenotype D2 than Subgenotype A2. Viruses 2020; 12:v12090967. [PMID: 32882910 PMCID: PMC7552069 DOI: 10.3390/v12090967] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 08/28/2020] [Accepted: 08/30/2020] [Indexed: 02/08/2023] Open
Abstract
Hepatitis B surface antigen (HBsAg) promotes persistent hepatitis B virus (HBV) infection. It primarily corresponds to small (S) envelope protein secreted as subviral particles. We previously found that genotype D clones expressed less S protein than genotype A clones but showed higher extracellular/intracellular ratio of HBsAg suggesting more efficient secretion. The current study aimed to characterize the underlying mechanism(s) by comparing a subgenotype A2 clone (geno5.4) with a subgenotype D2 clone (geno1.2). Five types of full-length or subgenomic constructs were transfected to Huh7 cells at different dosage. HBsAg was quantified by enzyme linked immunosorbent assay while envelope proteins were detected by Western blot. We found that ratio of extracellular/intracellular HBsAg decreased at increasing amounts of DNA transfected. Conflicting findings from two types of subgenomic construct confirmed stronger secretion inhibitory effect of the genotype D-derived large envelope protein. Chimeric constructs followed by site-directed mutagenesis revealed geno1.2 specific V118/T127 and F161/A168 in the S protein as promoting and inhibitory of HBsAg secretion, respectively. In conclusion, more efficient HBsAg secretion by subgenotype D2 than subgenotype A2 is attributed to lower level of S protein expression in addition to V118 and T127 in S protein, although its F161 and A168 sequences rather reduce HBsAg secretion.
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9
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The Lived Experience of Chronic Hepatitis B: A Broader View of Its Impacts and Why We Need a Cure. Viruses 2020; 12:v12050515. [PMID: 32392763 PMCID: PMC7290920 DOI: 10.3390/v12050515] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 04/25/2020] [Accepted: 05/05/2020] [Indexed: 02/07/2023] Open
Abstract
Chronic hepatitis B (CHB) is one of the most widespread liver diseases in the world. It is currently incurable and can lead to liver cirrhosis and cancer. The considerable impacts on society caused by CHB through patient mortality, morbidity, and economic loss are well-recognised in the field. This is, however, a narrow view of the harms, given that people living with CHB can be asymptomatic for the majority of their life-long infection. Of less-appreciated importance are the psychosocial harms, which can continue throughout an affected person's lifetime. Here we review the broad range of these impacts, which include fear and anxiety; financial loss and instability; stigma and discrimination; and rejection by society. Importantly, these directly affect patient diagnosis, management, and treatment. Further, we highlight the roles that the research community can play in taking these factors into account and mitigating them. In particular, the development of a cure for hepatitis B virus infection would alleviate many of the psychosocial impacts of CHB. We conclude that there should be a greater recognition of the full impacts associated with CHB to bring meaningful, effective, and deliverable results to the global community living with hepatitis B.
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10
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Gill US, Battisti A, Kennedy PTF. Emerging tools in the changing landscape of chronic hepatitis B management. Expert Rev Anti Infect Ther 2019; 17:943-955. [PMID: 31738607 DOI: 10.1080/14787210.2019.1694906] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Introduction: The availability of a preventative vaccine, interferon, and nucleos(t)ide analogs have provided progress in the control of chronic hepatitis B (CHB). Despite this, it remains a major contributor to global morbidity and mortality. Developments in our understanding of the pathogenesis of CHB and the emergence of new therapies are paving the way, as we move toward HBV cure.Areas covered: We performed bibliographical searches of online databases to review the literature regarding conventional disease phases of CHB. We provide the latest evidence challenging the perception of the natural history of CHB, noting that previously considered quiescent disease phases may not represent benign disease states devoid of progression. We explore the use of potential novel immunological and viral tools which should enhance disease stratification and management decisions in the coming years. Finally, we discuss the timing of treatment and how this could be initiated earlier to improve treatment outcomes, preventing sequelae of chronic infection.Expert opinion: The treatment paradigm in CHB is set to change with multiple novel agents in early phase clinical trials with the aim of a functional cure. An improved understanding of disease pathogenesis and the timing of treatment will be critical to the success of new therapies.
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Affiliation(s)
- Upkar S Gill
- Barts Liver Centre, Centre for Immunobiology, Blizard Institute, Barts and The London School of Medicine & Dentistry, Queen Mary University of London, London, UK
| | - Arianna Battisti
- Barts Liver Centre, Centre for Immunobiology, Blizard Institute, Barts and The London School of Medicine & Dentistry, Queen Mary University of London, London, UK
| | - Patrick T F Kennedy
- Barts Liver Centre, Centre for Immunobiology, Blizard Institute, Barts and The London School of Medicine & Dentistry, Queen Mary University of London, London, UK
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11
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Paximadis M, Perez Patrigeon S, Rajasuriar R, Tatoud R, Scully E, Arbuthnot P. Hepatitis B and HIV-1 2019 IAS Cure Forum: lessons and benefits from interdisciplinary research. J Virus Erad 2019; 5:234-244. [PMID: 31754448 PMCID: PMC6844409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Affiliation(s)
- M Paximadis
- Centre for HIV and STIs, Cell Biology,
National Institute for Communicable Diseases and University of the Witwatersrand,
Johannesburg,
South Africa
| | - S Perez Patrigeon
- Division of Infectious Diseases,
Queen's University,
Kingston,
Ontario,
Canada
| | - R Rajasuriar
- Department of Medicine, Faculty of Medicine, University of Malaya and the Centre of Excellence for Research in AIDS (CERiA),
University of Malaya,
Malaysia
| | - R Tatoud
- International AIDS Society,
Geneva,
Switzerland,Corresponding author: Roger Tadoud
Avenue de France 23,
1202 Geneva,
Switzerland
| | - E Scully
- Division of Infectious Diseases, Department of Internal Medicine,
Johns Hopkins University,
Baltimore,
MD,
USA
| | - P Arbuthnot
- Wits/SAMRC Antiviral Gene Therapy Research Unit, School of Pathology, Faculty of Health Science,
University of the Witwatersrand,
Johannesburg,
South Africa
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12
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Paximadis M, Perez Patrigeon S, Rajasuriar R, Tatoud R, Scully E, Arbuthnot P. Hepatitis B and HIV-1 2019 IAS Cure Forum: lessons and benefits from interdisciplinary research. J Virus Erad 2019. [DOI: 10.1016/s2055-6640(20)30027-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
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13
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Abstract
Hepatitis B virus infection is the cause of liver diseases such as cirrhosis and liver cancer. Understanding the host-virus mechanisms that mediate virus pathogenesis can help design better preventive measures for disease control. Mathematical models have been used alongside experimental data to provide insight into the role of immune responses during the acute and chronic hepatitis B infections as well as virus dynamics following administration of combined drug therapy. In this paper, we review several modeling studies on virus-host interactions during acute infection, the virus-host characteristics responsible for transition to chronic disease, and the efficacy and optimal control measures of drug therapy. We conclude by presenting our opinion on the future directions of the field.
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Affiliation(s)
- Stanca M Ciupe
- Department of Mathematics, Virginia Tech, Blacksburg, VA, USA
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14
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Indolfi G, Easterbrook P, Dusheiko G, Siberry G, Chang MH, Thorne C, Bulterys M, Chan PL, El-Sayed MH, Giaquinto C, Jonas MM, Meyers T, Walsh N, Wirth S, Penazzato M. Hepatitis B virus infection in children and adolescents. Lancet Gastroenterol Hepatol 2019; 4:466-476. [PMID: 30982722 DOI: 10.1016/s2468-1253(19)30042-1] [Citation(s) in RCA: 93] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2018] [Revised: 01/20/2019] [Accepted: 01/22/2019] [Indexed: 02/06/2023]
Abstract
Hepatitis B virus (HBV) infection is a major cause of acute and chronic liver disease and associated morbidity and mortality worldwide. Vertical (mother-to-child) and horizontal early childhood transmission are the main routes of HBV transmission and are responsible for most chronic infections, including among adults who bear the greatest burden of morbidity and mortality. Universal hepatitis B immunisation at birth and in infancy is the key strategy for global elimination of HBV infection, and has been highly effective in reducing new vertical infections. However, global progress in scale-up of HBV testing and treatment has been slow in adults and children. In this Series paper, we summarise knowledge on the epidemiology, natural history, and treatment of chronic HBV infection in adolescents and children, and we highlight key differences from HBV infection in adults. The estimated global prevalence of HBV infection in children aged 5 years or younger is 1·3%. Most children are in the high-replication, low-inflammation phase of infection, with normal or only slightly raised aminotransferases; cirrhosis and hepatocellular carcinoma are rare. Although entecavir is approved and recommended for children aged 2-17 years, and tenofovir for those aged 12-18 years, a conservative approach to treatment initiation in children is recommended. Key actions to address current policy gaps include: validation of non-invasive tests for liver disease staging; additional immunopathogenesis studies in children with HBV infection; long-term follow-up of children on nucleoside or nucleotide analogue regimens to inform guidance on when to start treatment; evaluation of different treatment strategies for children with high rates of HBV replication; and establishment of paediatric treatment registries and international consortia to promote collaborative research.
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Affiliation(s)
- Giuseppe Indolfi
- Paediatric and Liver Unit, Meyer Children's University Hospital of Florence, Florence, Italy
| | - Philippa Easterbrook
- Global Hepatitis Programme and HIV Department, World Health Organization, Geneva, Switzerland.
| | - Geoffrey Dusheiko
- King's College Hospital, London, UK; University College London Medical School, London, UK
| | - George Siberry
- Office of the US Global AIDS Coordinator, US Department of State, Washington, DC, USA
| | - Mei-Hwei Chang
- Department of Paediatrics, National Taiwan University Hospital, Taipei, Taiwan
| | - Claire Thorne
- UCL Great Ormond Street Institute of Child Health, University College London, NIHR GOSH BRC, London, UK
| | - Marc Bulterys
- Global Hepatitis Programme and HIV Department, World Health Organization, Geneva, Switzerland
| | - Po-Lin Chan
- World Health Organization Regional Office for the Western Pacific, Manila, Philippines
| | - Manal H El-Sayed
- Department of Paediatrics, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - Carlo Giaquinto
- Department of Women and Child Health, University of Padova, Padova, Italy
| | - Maureen M Jonas
- Division of Gastroenterology, Hepatology, and Nutrition, Boston Children's Hospital, Boston, MA, USA
| | - Tammy Meyers
- Department of Paediatrics and Child Health, Faculty of Health Sciences, University of the Witwatersrand, South Africa
| | - Nick Walsh
- Pan American Health Organization, World Health Organization Regional Office for the Americas, Washington, DC, USA
| | - Stefan Wirth
- Department of Paediatrics, Helios Medical Centre Wuppertal, Witten-Herdecke University, Witten, Germany
| | - Martina Penazzato
- Global Hepatitis Programme and HIV Department, World Health Organization, Geneva, Switzerland
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15
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Coffin CS, Fung SK, Alvarez F, Cooper CL, Doucette KE, Fournier C, Kelly E, Ko HH, Ma MM, Martin SR, Osiowy C, Ramji A, Tam E, Villeneuve JP. Management of Hepatitis B Virus Infection: 2018 Guidelines from the Canadian Association for the Study of Liver Disease and Association of Medical Microbiology and Infectious Disease Canada. CANADIAN LIVER JOURNAL 2018; 1:156-217. [PMID: 35992619 PMCID: PMC9202759 DOI: 10.3138/canlivj.2018-0008] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Accepted: 04/17/2018] [Indexed: 08/01/2023]
Abstract
Hepatitis B virus (HBV) infection is an important public health problem in Canada. In keeping with evolving evidence and understanding of HBV pathogenesis, the Canadian Association for the Study of Liver Disease periodically publishes HBV management guidelines. The goals of the 2018 guidelines are to (1) highlight the public health impact of HBV infection in Canada and the need to improve diagnosis and linkage to care, (2) recommend current best-practice guidelines for treatment of HBV, (3) summarize the key HBV laboratory diagnostic tests, and (4) review evidence on HBV management in special patient populations and include more detail on management of HBV in pediatric populations. An overview of novel HBV tests and therapies for HBV in development is provided to highlight the recent advances in HBV clinical research. The aim and scope of these guidelines are to serve as an up-to-date, comprehensive resource for Canadian health care providers in the management of HBV infection.
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Affiliation(s)
- Carla S. Coffin
- Cumming School of Medicine, University of Calgary, Calgary, Alberta
| | - Scott K. Fung
- Faculty of Medicine, University of Toronto, Toronto, Ontario
| | - Fernando Alvarez
- Centre hospitalier de l’université de Montréal (CHUM)—CHU Sainte-Justine, Montreal, Québec
| | - Curtis L. Cooper
- Division of Infectious Diseases, Department of Medicine, University of Ottawa, Ottawa, Ontario
| | - Karen E. Doucette
- Division of Infectious Diseases, University of Alberta, Edmonton, Alberta
| | - Claire Fournier
- Department of Medicine, Université de Montréal, Montreal, Québec
| | - Erin Kelly
- Division of Gastroenterology, Department of Medicine, University of Ottawa, Ottawa, Ontario
| | - Hin Hin Ko
- Faculty of Medicine, University of British Columbia, Vancouver, British Columbia
| | - Mang M Ma
- Division of Gastroenterology, University of Alberta, Edmonton, Alberta
| | | | - Carla Osiowy
- Viral Hepatitis and Bloodborne Pathogens, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba
| | - Alnoor Ramji
- St. Paul’s Hospital, Vancouver, British Columbia
| | - Edward Tam
- LAIR Centre, Vancouver, British Columbia
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16
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Abstract
Hepatitis B virus (HBV) is a hepatotropic virus that can establish a persistent and chronic infection in humans through immune anergy. Currently, 3.5% of the global population is chronically infected with HBV, although the incidence of HBV infections is decreasing owing to vaccination and, to a lesser extent, the use of antiviral therapy to reduce the viral load of chronically infected individuals. The course of chronic HBV infection typically comprises different clinical phases, each of which potentially lasts for decades. Well-defined and verified serum and liver biopsy diagnostic markers enable the assessment of disease severity, viral replication status, patient risk stratification and treatment decisions. Current therapy includes antiviral agents that directly act on viral replication and immunomodulators, such as interferon therapy. Antiviral agents for HBV include reverse transcriptase inhibitors, which are nucleoside or nucleotide analogues that can profoundly suppress HBV replication but require long-term maintenance therapy. Novel compounds are being actively investigated to achieve the goal of HBV surface antigen seroclearance (functional cure), a serological state that is associated with a higher remission rate (thus, no viral rebound) after treatment cessation and a lower rate of cirrhosis and hepatocellular carcinoma. This Primer addresses several aspects of HBV infection, including epidemiology, immune pathophysiology, diagnosis, prevention and management.
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17
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Gill US, Pallett LJ, Kennedy PTF, Maini MK. Liver sampling: a vital window into HBV pathogenesis on the path to functional cure. Gut 2018; 67:767-775. [PMID: 29331944 PMCID: PMC6058064 DOI: 10.1136/gutjnl-2017-314873] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Revised: 11/29/2017] [Accepted: 12/07/2017] [Indexed: 12/12/2022]
Abstract
In order to optimally refine the multiple emerging drug targets for hepatitis B virus (HBV), it is vital to evaluate virological and immunological changes at the site of infection. Traditionally liver biopsy has been the mainstay of HBV disease assessment, but with the emergence of non-invasive markers of liver fibrosis, there has been a move away from tissue sampling. Here we argue that liver biopsy remains an important tool, not only for the clinical assessment of HBV but also for research progress and evaluation of novel agents. The importance of liver sampling has been underscored by recent findings of specialised subsets of tissue-resident immune subsets capable of efficient pathogen surveillance, compartmentalised in the liver and not sampled in the blood. Importantly, the assessment of virological parameters, such as cccDNA quantitation, also requires access to liver tissue. We discuss strategies to maximise information obtained from the site of infection and disease pathology. Fine needle aspirates of the liver may allow longitudinal sampling of the local virus/host landscape. The careful utilisation of liver tissue and aspirates in conjunction with blood will provide critical information in the assessment of new therapeutics for the functional cure of HBV.
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Affiliation(s)
- Upkar S Gill
- Department of Hepatology, Centre for Immunobiology, Blizard Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | | | - Patrick T F Kennedy
- Department of Hepatology, Centre for Immunobiology, Blizard Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Mala K Maini
- Division of Infection and Immunity, UCL, London, UK
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18
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Zhang S, Zhao J, Zhang Z. Humoral immunity, the underestimated player in hepatitis B. Cell Mol Immunol 2017; 15:645-648. [PMID: 29225341 DOI: 10.1038/cmi.2017.132] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 10/11/2017] [Indexed: 12/15/2022] Open
Affiliation(s)
- Shuye Zhang
- Shanghai Public Health Clinical Center and Institute of Biomedical Sciences, Fudan University, 201508, Shanghai, China
| | - Juanjuan Zhao
- Research Center for Clinical & Translational Medicine, Beijing 302 Hospital, 100039, Beijing, China
| | - Zheng Zhang
- Research Center for Clinical & Translational Medicine, Beijing 302 Hospital, 100039, Beijing, China.
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19
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Peters MG, Locarnini S. New Direct-Acting Antiviral Agents and Immunomodulators for Hepatitis B Virus Infection. Gastroenterol Hepatol (N Y) 2017; 13:348-356. [PMID: 28690451 PMCID: PMC5495044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Chronic hepatitis B (CHB) affects over 350 million individuals worldwide and is the most common cause of liver cancer. In the United States, CHB affects at least 2 to 3 million individuals, and current therapies can control the disease but not cure it. There are over 30 new molecules being studied in CHB in preclinical to phase 2 studies, targeting specific parts of the hepatitis B virus (HBV) life cycle and the host immune response. When discussing new therapies for CHB, it is critical to understand both the various phases of CHB and the life cycle of HBV. This article will discuss both of these issues, as well as mechanisms of action of potential therapies and possible ways to combine such therapies in the various phases of CHB.
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Affiliation(s)
- Marion G Peters
- Dr Peters is a professor of medicine and chief of hepatology research in the Department of Medicine at the University of California in San Francisco, California. Dr Locarnini is a professor of microbiology and immunology at the University of Melbourne and is director of the WHO Regional Reference Laboratory for Hepatitis B within the Victorian Infectious Diseases Reference Laboratory at the Doherty Institute in Melbourne, Australia
| | - Stephen Locarnini
- Dr Peters is a professor of medicine and chief of hepatology research in the Department of Medicine at the University of California in San Francisco, California. Dr Locarnini is a professor of microbiology and immunology at the University of Melbourne and is director of the WHO Regional Reference Laboratory for Hepatitis B within the Victorian Infectious Diseases Reference Laboratory at the Doherty Institute in Melbourne, Australia
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