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Almeida RWD, Mello FCDA, Menegoy IV, Santo MPDE, Ginuíno CF, Sousa PSFD, Villar LM, Lampe E, Lewis-Ximenez LL. Detection and molecular characterisation of a diagnosis escape variant associated with occult hepatitis B virus in Brazil. Mem Inst Oswaldo Cruz 2017; 112:485-491. [PMID: 28591309 PMCID: PMC5452485 DOI: 10.1590/0074-02760160477] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Accepted: 03/21/2017] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND Many studies have identified mutations in the hepatitis B surface antigen (HBsAg) as important factors limiting the ability of commercial serological assays to detect this viral antigen. However, an association between mutations in the HBsAg gene and the occurrence of occult HBV infection (OBI) in patients has not been established. OBJECTIVES To detect hepatitis B virus (HBV) DNA in patients with anti-HBc as a unique serological marker, a previously published, cost-effective TaqMan-based real-time polymerase chain reaction (PCR) test with minor groove binding probes was adapted for use in this study. The current study also aimed to investigate HBsAg mutations and genotypes of HBV in OBI at the Viral Hepatitis Ambulatory Clinic in Rio de Janeiro to determine any possible association. METHODS Intra-assay and inter-assay reproducibility were determined, and the mean coefficient of variation values obtained were 2.07 and 3.5, respectively. Probit analysis indicated that the 95% detection level was 25 IU/mL. The prevalence of OBI was investigated in 35 serum samples with an ‘anti-HBc alone’ profile from individuals who attended our clinic between 2011 and 2013. FINDINGS HBV DNA was detected in only one sample, resulting in an OBI rate of 2.9%. Nucleotide sequencing of the pre-S/S region was performed to genotype and analyse mutations within the HBsAg gene of this HBV DNA. The HBV in the OBI case was classified as sub-genotype A1, and a sequence analysis of the small S gene revealed 12 mutations in the major hydrophilic region compared to the consensus A1 sequence. Most of these mutations occurred in amino acid residues that have been reported as clinically relevant because they have been implicated in vaccine escape and/or inability to detect HBsAg by commercial serological assays. MAIN CONCLUSIONS Our study suggests the importance of specific HBsAg mutations, different from those in D, B, and C genotypes, in sub-genotype A1 HBV associated with OBI.
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Affiliation(s)
- Ricardo Wagner de Almeida
- Fundação Oswaldo Cruz-Fiocruz, Instituto Oswaldo Cruz, Laboratório de Hepatites Virais, Rio de Janeiro, RJ, Brasil
| | | | - Isabelle Vasconcelos Menegoy
- Fundação Oswaldo Cruz-Fiocruz, Instituto Oswaldo Cruz, Laboratório de Hepatites Virais, Rio de Janeiro, RJ, Brasil
| | | | - Cléber Ferreira Ginuíno
- Fundação Oswaldo Cruz-Fiocruz, Instituto Oswaldo Cruz, Laboratório de Hepatites Virais, Rio de Janeiro, RJ, Brasil
| | | | - Livia Melo Villar
- Fundação Oswaldo Cruz-Fiocruz, Instituto Oswaldo Cruz, Laboratório de Hepatites Virais, Rio de Janeiro, RJ, Brasil
| | - Elisabeth Lampe
- Fundação Oswaldo Cruz-Fiocruz, Instituto Oswaldo Cruz, Laboratório de Hepatites Virais, Rio de Janeiro, RJ, Brasil
| | - Lia Laura Lewis-Ximenez
- Fundação Oswaldo Cruz-Fiocruz, Instituto Oswaldo Cruz, Laboratório de Hepatites Virais, Rio de Janeiro, RJ, Brasil
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Hossain MG, Ueda K. Investigation of a Novel Hepatitis B Virus Surface Antigen (HBsAg) Escape Mutant Affecting Immunogenicity. PLoS One 2017; 12:e0167871. [PMID: 28045894 PMCID: PMC5207502 DOI: 10.1371/journal.pone.0167871] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Accepted: 11/21/2016] [Indexed: 02/07/2023] Open
Abstract
Mutation in the hepatitis B virus surface antigen (HBsAg) may affect the efficiency of diagnostic immunoassays or success of vaccinations using HBsAg. Thus, antigenicity and immunogenicity analyses of the mutated HBsAg are necessary to develop novel diagnostic tools and efficient vaccinations. Here, the in vitro antigenicity of three wild-type HBsAg open reading frames (ORFs) (adr4, W1S [subtype adr] and W3S [subtype adr]) isolated from clinically infected patients and nineteen synthesized single/double/multiple amino acid-substituted mutants were tested with commercial ELISA kits. Immunofluorescence staining of transfected cells and Western blot analysis confirmed that these ORFs were expressed at comparable levels in HEK-293 cells. W1S and adr4 were clearly detected, whereas W3S could not be detected. Using the same commercial immunoassay kit, we found that the single mutants, K120P and D123T, were marginally reactive, whereas W3S-aW1S and the double mutant, K120P/D123T, exhibited antigenicity roughly equivalent to the wild-type wako1S. On the other hand, the single mutants of W1S, P120K and T123D, significantly impaired the reactivity, while W1S-aW3S and the double mutant of W1S, P120K/T123D, resulted in a complete loss of antigenicity. In addition, ELISA revealed reduced HBs antigenicity of two mutants, W1S N146G and W1S Q129R/G145R. These commercial ELISA-based antigenic reactivities of HBsAg were also strongly correlated with the predicted Ai alterations of affected amino acids due to the specific mutation. In conclusion, this study showed for the first time that lysine (K120) and aspartate (D123) simultaneously affected HBsAg antigenicity, leading to diagnostic failure. These findings will improve diagnostic assays and vaccine development.
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Affiliation(s)
- Md. Golzar Hossain
- Division of Virology, Department of Microbiology and Immunology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Keiji Ueda
- Division of Virology, Department of Microbiology and Immunology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
- * E-mail:
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3
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Velay A, Jeulin H, Eschlimann M, Malvé B, Goehringer F, Bensenane M, Frippiat JP, Abraham P, Ismail AM, Murray JM, Combet C, Zoulim F, Bronowicki JP, Schvoerer E. Characterization of hepatitis B virus surface antigen variability and impact on HBs antigen clearance under nucleos(t)ide analogue therapy. J Viral Hepat 2016; 23:387-98. [PMID: 26742490 DOI: 10.1111/jvh.12498] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Accepted: 11/01/2015] [Indexed: 12/15/2022]
Abstract
For hepatitis B virus (HBV)-related chronic infection under treatment by nucleos(t)ide analogues (NUCs), HBsAg clearance is the ultimate therapeutic goal but very infrequent. We investigated how HBV envelope protein variability could lead to differential HBsAg clearance on NUCs. For 12 HBV genotype D patients receiving NUCs, six resolvers (HBsAg clearance) were compared to six matched nonresolvers (HBsAg persistence). PreS/S amino acid (aa) sequences were analysed with bioinformatics to predict HBV envelope antigenicity and aa covariance. To enrich our analyses on very rare resolvers, these were compared with other HBV genotype D strains in three characterized clinical cohorts including common chronically infected patients. The sT125M+sP127T combination was observed in four nonresolvers of six, corroborated by aa covariance analysis, associated with a lower predicted antigenicity than sT125T+sP127P. Concordant features within this HBV key functional domain, at positions 125 and 127, were reported from two of the three comparative cohorts. In our hands, a lower ELISA reactivity of HBV-vaccinated mice sera was observed against the sT125M mutant. In the S gene, 56 aa changes in minor variants were detected in non-resolvers, mainly in the major hydrophilic region, vs 28 aa changes in resolvers. Molecular features in patients showing HBsAg persistence on NUCs argue in favour of a different aa pattern in the HBV S gene compared to those showing HBsAg clearance. In nonresolvers, a decrease in HBs 'a' determinant antigenicity and more frequent mutations in the S gene suggest a role for the HBV envelope characteristics in HBsAg persistence.
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Affiliation(s)
- A Velay
- EA 7300 'Stress, Immunité, Pathogènes', Université de Lorraine, Vandoeuvre-les-Nancy, France
| | - H Jeulin
- EA 7300 'Stress, Immunité, Pathogènes', Université de Lorraine, Vandoeuvre-les-Nancy, France.,Laboratoire de Virologie, Centre Hospitalier Universitaire de Nancy, Vandoeuvre-les-Nancy, France
| | - M Eschlimann
- EA 7300 'Stress, Immunité, Pathogènes', Université de Lorraine, Vandoeuvre-les-Nancy, France
| | - B Malvé
- Laboratoire de Virologie, Centre Hospitalier Universitaire de Nancy, Vandoeuvre-les-Nancy, France
| | - F Goehringer
- Service des Maladies Infectieuses et Tropicales, Centre Hospitalier Universitaire de Nancy, Vandoeuvre-les-Nancy, France
| | - M Bensenane
- Service d'Hépato-gastroentérologie, Centre Hospitalier Universitaire de Nancy, Vandoeuvre-les-Nancy, France
| | - J-P Frippiat
- EA 7300 'Stress, Immunité, Pathogènes', Université de Lorraine, Vandoeuvre-les-Nancy, France
| | - P Abraham
- Department of Clinical Virology, Christian Medical College, Vellore, Tamil Nadu, India
| | - A M Ismail
- Department of Clinical Virology, Christian Medical College, Vellore, Tamil Nadu, India
| | - J M Murray
- School of Mathematics and Statistics, UNSW Australia, Sydney, NSW, Australia
| | - C Combet
- Unité Inserm UI1052, Université de Lyon, Lyon, France
| | - F Zoulim
- Unité Inserm UI1052, Université de Lyon, Lyon, France
| | - J-P Bronowicki
- Service d'Hépato-gastroentérologie, Centre Hospitalier Universitaire de Nancy, Vandoeuvre-les-Nancy, France
| | - E Schvoerer
- EA 7300 'Stress, Immunité, Pathogènes', Université de Lorraine, Vandoeuvre-les-Nancy, France.,Laboratoire de Virologie, Centre Hospitalier Universitaire de Nancy, Vandoeuvre-les-Nancy, France
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4
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Al-Qudari AY, Amer HM, Abdo AA, Hussain Z, Al-Hamoudi W, Alswat K, Almajhdi FN. Surface gene variants of hepatitis B Virus in Saudi Patients. Saudi J Gastroenterol 2016; 22:133-8. [PMID: 26997220 PMCID: PMC4817297 DOI: 10.4103/1319-3767.167186] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND/AIMS Hepatitis B virus (HBV) continues to be one of the most important viral pathogens in humans. Surface (S) protein is the major HBV antigen that mediates virus attachment and entry and determines the virus subtype. Mutations in S gene, particularly in the "a" determinant, can influence virus detection by ELISA and may generate escape mutants. Since no records have documented the S gene mutations in HBV strains circulating in Saudi Arabia, the current study was designed to study sequence variation of S gene in strains circulating in Saudi Arabia and its correlation with clinical and risk factors. PATIENTS AND METHODS A total of 123 HBV-infected patients were recruited for this study. Clinical and biochemical parameters, serological markers, and viral load were determined in all patients. The entire S gene sequence of samples with viral load exceeding 2000 IU/mL was retrieved and exploited in sequence and phylogenetic analysis. RESULTS A total of 48 mutations (21 unique) were recorded in viral strains in Saudi Arabia, among which 24 (11 unique) changed their respective amino acids. Two amino acid changes were recorded in "a" determinant, including F130L and S135F with no evidence of the vaccine escape mutant G145R in any of the samples. No specific relationship was recognized between the mutation/amino acid change record of HBsAg in strains in Saudi Arabia and clinical or laboratory data. Phylogenetic analysis categorized HBV viral strains in Saudi Arabia as members of subgenotypes D1 and D3. CONCLUSION The present report is the first that describes mutation analysis of HBsAg in strains in Saudi Arabia on both nucleotide and amino acid levels. Different substitutions, particularly in major hydrophilic region, may have a potential influence on disease diagnosis, vaccination strategy, and antiviral chemotherapy.
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Affiliation(s)
- Ahmed Y. Al-Qudari
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Haitham M. Amer
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia,Department of Virology, Cairo University, Giza, Egypt
| | - Ayman A. Abdo
- Department of Medicine, King Saud University Liver Research Center, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Zahid Hussain
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Waleed Al-Hamoudi
- Department of Medicine, King Saud University Liver Research Center, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Khalid Alswat
- Department of Medicine, King Saud University Liver Research Center, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Fahad N. Almajhdi
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia,Address for correspondence: Dr. Fahad N. Almajhdi, Department of Botany and Microbiology, College of Science, King Saud University, PO Box 2455, Riyadh - 11451, Saudi Arabia. E-mail:
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Colson P, Borentain P, Coso D, Motte A, Aurran-Schleinitz T, Charbonnier A, Stoppa AM, Chabannon C, Serrero M, Bertrand J, Barlesi F, Serratrice J, Portal I, Botta-Fridlund D, Tamalet C, Gerolami R. Hepatitis B virus reactivation in HBsAg-negative patients is associated with emergence of viral strains with mutated HBsAg and reverse transcriptase. Virology 2015; 484:354-363. [PMID: 26186574 DOI: 10.1016/j.virol.2015.06.017] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Revised: 05/11/2015] [Accepted: 06/12/2015] [Indexed: 12/17/2022]
Abstract
BACKGROUND/AIMS Virological factors associated with hepatitis B virus reactivation (HBV-R), following chemotherapy for cancer in hepatitis B surface antigen (HBsAg)-negative patients, are not well known. MATERIALS AND METHODS HBV strains from 16 patients presenting HBV-R following chemotherapy were studied and compared to those obtained from 51 HBV chronically-infected patients. RESULTS HBsAg variability was significantly increased within the major hydrophilic region, the a determinant and the C-terminal region. Amino acid substitutions were more frequently found in HBV-R patients as compared to controls at 17 and 11 positions within HBsAg and HBV-RT, respectively. This resulted in atypical serological testing in 56% of patients and detection of resistance mutation to nucleoside analogs in 12.5%. CONCLUSION HBsAg and HBV-RT mutations are frequently encountered in patients with HBV-R, resulting in atypical serological testing and emergence of HBV strains resistant to nucleos(t)ides analogs.
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Affiliation(s)
- Philippe Colson
- IHU Méditerranée Infection, Pôle des Maladies Infectieuses et Tropicales Clinique et Biologique, Fédération de Bactériologie-Hygiène-Virologie, Centre Hospitalo-Universitaire Timone, Assistance Publique - Hôpitaux de Marseille, Marseille, France; Aix-Marseille Université, URMITE UM63 CNRS 7278 IRD 198 INSERM U1095, Facultés de Médecine et de Pharmacie, Marseille, France
| | - Patrick Borentain
- Service d'Hépato-Gastroentérologie Centre Hospitalo-Universitaire Timone, Assistance Publique-Hôpitaux de Marseille, Marseille, France; Aix-Marseille Université UMR INSERM 911. Facultés de Médecine et de Pharmacie, Marseille, France
| | - Diane Coso
- Service d׳Onco-hématologie, Institut Paoli Calmettes, Marseille, France
| | - Anne Motte
- IHU Méditerranée Infection, Pôle des Maladies Infectieuses et Tropicales Clinique et Biologique, Fédération de Bactériologie-Hygiène-Virologie, Centre Hospitalo-Universitaire Timone, Assistance Publique - Hôpitaux de Marseille, Marseille, France; Aix-Marseille Université, URMITE UM63 CNRS 7278 IRD 198 INSERM U1095, Facultés de Médecine et de Pharmacie, Marseille, France
| | | | - Aude Charbonnier
- Service d׳Onco-hématologie, Institut Paoli Calmettes, Marseille, France
| | - Anne Marie Stoppa
- Service d׳Onco-hématologie, Institut Paoli Calmettes, Marseille, France
| | | | - Mélanie Serrero
- Service d'Hépato-Gastroentérologie Centre Hospitalo-Universitaire Timone, Assistance Publique-Hôpitaux de Marseille, Marseille, France
| | - Julie Bertrand
- Service d'Hépato-Gastroentérologie Centre Hospitalo-Universitaire Timone, Assistance Publique-Hôpitaux de Marseille, Marseille, France
| | - Fabrice Barlesi
- Aix Marseille Université - Assistance Publique Hôpitaux de Marseille, Multidisciplinary Oncology and Therapeutic Innovations Department, Marseille, France
| | - Jacques Serratrice
- Service de Médecine Interne, Centre Hospitalier Universitaire de la Timone. Assistance Publique Hôpitaux de Marseille, Marseille, France
| | - Isabelle Portal
- Service d'Hépato-Gastroentérologie Centre Hospitalo-Universitaire Timone, Assistance Publique-Hôpitaux de Marseille, Marseille, France
| | - Daniele Botta-Fridlund
- Service d'Hépato-Gastroentérologie Centre Hospitalo-Universitaire Timone, Assistance Publique-Hôpitaux de Marseille, Marseille, France
| | - Catherine Tamalet
- IHU Méditerranée Infection, Pôle des Maladies Infectieuses et Tropicales Clinique et Biologique, Fédération de Bactériologie-Hygiène-Virologie, Centre Hospitalo-Universitaire Timone, Assistance Publique - Hôpitaux de Marseille, Marseille, France; Aix-Marseille Université, URMITE UM63 CNRS 7278 IRD 198 INSERM U1095, Facultés de Médecine et de Pharmacie, Marseille, France
| | - René Gerolami
- Service d'Hépato-Gastroentérologie Centre Hospitalo-Universitaire Timone, Assistance Publique-Hôpitaux de Marseille, Marseille, France; Aix-Marseille Université UMR INSERM 911. Facultés de Médecine et de Pharmacie, Marseille, France.
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Pondé RAA. Molecular mechanisms underlying HBsAg negativity in occult HBV infection. Eur J Clin Microbiol Infect Dis 2015; 34:1709-31. [PMID: 26105620 DOI: 10.1007/s10096-015-2422-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Accepted: 06/03/2015] [Indexed: 02/06/2023]
Abstract
Although genomic detection is considered the gold standard test on HBV infection identification, the HBsAg investigation is still the most frequent clinical laboratory request to diagnose HBV infection in activity. However, the non-detection of HBsAg in the bloodstream of chronic or acutely infected individuals has been a phenomenon often observed in clinical practice, despite the high sensitivity and specificity of screening assays standardized commercially and adopted in routine. The expansion of knowledge about the hepatitis B virus biology (replication/life cycle, genetic variability/mutability/heterogeneity), their biochemical and immunological properties (antigenicity and immunogenicity), in turn, has allowed to elucidate some mechanisms that may explain the occurrence of this phenomenon. Therefore, the negativity for HBsAg during the acute or chronic infection course may become a fragile or at least questionable result. This manuscript discusses some mechanisms that could explain the negativity for HBsAg in a serological profile of individuals with HBV infection in activity, or factors that could compromise its detection in the bloodstream during HBV infection.
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Affiliation(s)
- R A A Pondé
- Laboratory of Human Virology, Institute of Tropical Pathology and Public Health, Federal University of Goiás, Goiânia, Goiás, Brazil,
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7
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Lewis JM, Hart IJ, Nsutebu E. Reactivation of a hepatitis B virus surface-antigen mutant following an autologous stem-cell transplant for multiple myeloma in an anti-HBc-negative patient. JMM Case Rep 2015. [DOI: 10.1099/jmmcr.0.000041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Affiliation(s)
- Joseph M Lewis
- Tropical and Infectious Diseases Unit, Royal Liverpool Hospital, Prescot St, Liverpool, UK
| | - Ian J Hart
- Liverpool Specialist Virology Centre, Royal Liverpool University Hospital and University of Liverpool, Prescot St, Liverpool, UK
| | - Emmanuel Nsutebu
- Tropical and Infectious Diseases Unit, Royal Liverpool Hospital, Prescot St, Liverpool, UK
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Baclig MO, Reyes KG, Mapua CA, Gopez-Cervantes J, Natividad FF. Frequency of interleukin 28B rs12979860 C>T variants in Filipino patients chronically infected with hepatitis B virus. Mol Biol Rep 2015; 42:673-9. [PMID: 25391769 DOI: 10.1007/s11033-014-3814-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Accepted: 11/03/2014] [Indexed: 10/24/2022]
Abstract
Hepatitis B virus (HBV) is one of the most prevalent viral infections worldwide. Nearly 400 million individuals are chronic carriers of HBV. The aim of the present study was to determine the frequency of human interleukin 28B (IL28B) variants among treatment naive Filipino patients clinically diagnosed with chronic hepatitis B (CHB), and to compare the IL28B frequency distribution with various ethnic populations. Fifty-seven CHB patients and 43 normal controls were enrolled in this study. Real-time PCR was performed using the TaqMan genotyping assay for IL28B rs12979860. The allelic frequencies among normal controls were 0.94 and 0.06 for the IL28B rs12979860 C and T alleles, respectively. Eighty-eight percent were identified as homozygous for the IL28B C/C genotype and 12% were identified as heterozygous for the IL28B C/T genotype. Among CHB patients, the allelic frequencies were 0.90 for the IL28B C allele and 0.10 for the IL28B T allele. No IL28B T/T genotype was observed between the two groups. No significant difference in the distribution of IL28B genotypes was observed between normal controls and CHB patients. Allelic frequencies of IL28B among Filipinos were similar with other Asian populations but significantly different from Caucasians. The frequency of rs12979860 C>T variants among Filipino CHB patients has not yet been reported. These data provided new insight into the geographical frequency distribution of IL28B variants. Further studies are needed to determine the possible association between IL28B variants and response to pegylated-interferon-α plus ribavirin combination therapy among Filipino patients chronically infected with HBV.
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Affiliation(s)
- Michael O Baclig
- Research and Biotechnology, St. Luke's Medical Center, 279 E. Rodriguez Sr. Blvd., 1112, Quezon City, Philippines,
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