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Molecular Characterization and Resistance Profile of the Hepatitis B Virus to Polymerase Inhibitors in Infected Treatment-Naïve Patients in Abidjan

Received: 11 July 2023     Accepted: 1 August 2023     Published: 9 August 2023
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Abstract

Mutant selection is due to the high rate of viral replication and lack of proofreading activity in the hepatitis B virus (HBV) polymerase thus leading to the generation of mutations in HBV. However naturally occurring HBV strains carrying primary drug resistance mutations are very rare in the absence of prior treatment. Monitoring changes in primary and secondary resistance mutations in patients who haven't been treated is crucial in order to optimize and promote the best treatment, to obtain a sustained virological response (SVR) and therefore, reduce the progression to cirrhosis and later to hepatocellular carcinoma (HCC). The main purpose of this research was to evaluate the resistance of HBV to antivirals and show the genetic variability of HBV in a population of blood donors, carrying HBs antigen, naïve to anti-HBV treatment in Abidjan. A descriptive and analytical cross-sectional method was used to establish the molecular profile and to identify the polymorphism of HBV in treatment-naïve infected study participants. Adults blood donors, of any sex, with a positive result for HBsAg, naïve to any antiviral treatment but with an HBV viral load superior to 1000 IU/ml were included. The ABI 3130 Avant sequencer (Applied Biosystems, Courtaboeuf, France) was used to sequence the polymerase (pol) gene to determine HBV resistance genotypes. Fifty-three (N=53) blood donors infected with HBV (HBs Ag positive) were screened. All patients were naïve to any antiviral treatment. Of all these patients, 30 (56.6%) blood donors, carrying HBsAg with a viral load superior to 1000 IU/mL were included in the study. The median age was 34 years old (21-52). The median viral load was 6561 IU/mL (103 – 1.65 x 109). Two mutations of a single base, notably A181T and A181S were highlighted in this study. The A181T mutation was associated with resistance to adefovir, lamivudine and telbivudine. As for the A181S mutation, it was associated with resistance to adefovir only. Analysis of phylogenetic trees obtained by sequencing confirmed the circulation of 2 genotypes: E (22; 92%) and A (2; 8%). The circulation of genotypes A and E of HBV in Côte d'Ivoire has been confirmed by this study, with an estimated genotypic mutation prevalence of 8%. The resistance of HBV to some antiretroviral drugs in the class of HBV polymerase inhibitors, such as lamivudine (3TC), telbivudine (LdT) adefovir (ADV) may be attributed to these mutations.

Published in American Journal of BioScience (Volume 11, Issue 4)
DOI 10.11648/j.ajbio.20231104.13
Page(s) 92-97
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2023. Published by Science Publishing Group

Keywords

HBsAg, Hepatitis B, Primary Resistance

References
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    Doukou Essien Samuel, Toni Thomas D'Aquin, N’din Jean-Louis Philippe, Dechi Jean-Jacques Renaud, Gogbe Leto Olivier, et al. (2023). Molecular Characterization and Resistance Profile of the Hepatitis B Virus to Polymerase Inhibitors in Infected Treatment-Naïve Patients in Abidjan. American Journal of BioScience, 11(4), 92-97. https://doi.org/10.11648/j.ajbio.20231104.13

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    ACS Style

    Doukou Essien Samuel; Toni Thomas D'Aquin; N’din Jean-Louis Philippe; Dechi Jean-Jacques Renaud; Gogbe Leto Olivier, et al. Molecular Characterization and Resistance Profile of the Hepatitis B Virus to Polymerase Inhibitors in Infected Treatment-Naïve Patients in Abidjan. Am. J. BioScience 2023, 11(4), 92-97. doi: 10.11648/j.ajbio.20231104.13

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    AMA Style

    Doukou Essien Samuel, Toni Thomas D'Aquin, N’din Jean-Louis Philippe, Dechi Jean-Jacques Renaud, Gogbe Leto Olivier, et al. Molecular Characterization and Resistance Profile of the Hepatitis B Virus to Polymerase Inhibitors in Infected Treatment-Naïve Patients in Abidjan. Am J BioScience. 2023;11(4):92-97. doi: 10.11648/j.ajbio.20231104.13

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  • @article{10.11648/j.ajbio.20231104.13,
      author = {Doukou Essien Samuel and Toni Thomas D'Aquin and N’din Jean-Louis Philippe and Dechi Jean-Jacques Renaud and Gogbe Leto Olivier and N’Guessan Jean François and Chenal Henri and Messou Kouassi Eugene and Lohoues Esmel Claude and Ouassa Timothée},
      title = {Molecular Characterization and Resistance Profile of the Hepatitis B Virus to Polymerase Inhibitors in Infected Treatment-Naïve Patients in Abidjan},
      journal = {American Journal of BioScience},
      volume = {11},
      number = {4},
      pages = {92-97},
      doi = {10.11648/j.ajbio.20231104.13},
      url = {https://doi.org/10.11648/j.ajbio.20231104.13},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajbio.20231104.13},
      abstract = {Mutant selection is due to the high rate of viral replication and lack of proofreading activity in the hepatitis B virus (HBV) polymerase thus leading to the generation of mutations in HBV. However naturally occurring HBV strains carrying primary drug resistance mutations are very rare in the absence of prior treatment. Monitoring changes in primary and secondary resistance mutations in patients who haven't been treated is crucial in order to optimize and promote the best treatment, to obtain a sustained virological response (SVR) and therefore, reduce the progression to cirrhosis and later to hepatocellular carcinoma (HCC). The main purpose of this research was to evaluate the resistance of HBV to antivirals and show the genetic variability of HBV in a population of blood donors, carrying HBs antigen, naïve to anti-HBV treatment in Abidjan. A descriptive and analytical cross-sectional method was used to establish the molecular profile and to identify the polymorphism of HBV in treatment-naïve infected study participants. Adults blood donors, of any sex, with a positive result for HBsAg, naïve to any antiviral treatment but with an HBV viral load superior to 1000 IU/ml were included. The ABI 3130 Avant sequencer (Applied Biosystems, Courtaboeuf, France) was used to sequence the polymerase (pol) gene to determine HBV resistance genotypes. Fifty-three (N=53) blood donors infected with HBV (HBs Ag positive) were screened. All patients were naïve to any antiviral treatment. Of all these patients, 30 (56.6%) blood donors, carrying HBsAg with a viral load superior to 1000 IU/mL were included in the study. The median age was 34 years old (21-52). The median viral load was 6561 IU/mL (103 – 1.65 x 109). Two mutations of a single base, notably A181T and A181S were highlighted in this study. The A181T mutation was associated with resistance to adefovir, lamivudine and telbivudine. As for the A181S mutation, it was associated with resistance to adefovir only. Analysis of phylogenetic trees obtained by sequencing confirmed the circulation of 2 genotypes: E (22; 92%) and A (2; 8%). The circulation of genotypes A and E of HBV in Côte d'Ivoire has been confirmed by this study, with an estimated genotypic mutation prevalence of 8%. The resistance of HBV to some antiretroviral drugs in the class of HBV polymerase inhibitors, such as lamivudine (3TC), telbivudine (LdT) adefovir (ADV) may be attributed to these mutations.},
     year = {2023}
    }
    

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  • TY  - JOUR
    T1  - Molecular Characterization and Resistance Profile of the Hepatitis B Virus to Polymerase Inhibitors in Infected Treatment-Naïve Patients in Abidjan
    AU  - Doukou Essien Samuel
    AU  - Toni Thomas D'Aquin
    AU  - N’din Jean-Louis Philippe
    AU  - Dechi Jean-Jacques Renaud
    AU  - Gogbe Leto Olivier
    AU  - N’Guessan Jean François
    AU  - Chenal Henri
    AU  - Messou Kouassi Eugene
    AU  - Lohoues Esmel Claude
    AU  - Ouassa Timothée
    Y1  - 2023/08/09
    PY  - 2023
    N1  - https://doi.org/10.11648/j.ajbio.20231104.13
    DO  - 10.11648/j.ajbio.20231104.13
    T2  - American Journal of BioScience
    JF  - American Journal of BioScience
    JO  - American Journal of BioScience
    SP  - 92
    EP  - 97
    PB  - Science Publishing Group
    SN  - 2330-0167
    UR  - https://doi.org/10.11648/j.ajbio.20231104.13
    AB  - Mutant selection is due to the high rate of viral replication and lack of proofreading activity in the hepatitis B virus (HBV) polymerase thus leading to the generation of mutations in HBV. However naturally occurring HBV strains carrying primary drug resistance mutations are very rare in the absence of prior treatment. Monitoring changes in primary and secondary resistance mutations in patients who haven't been treated is crucial in order to optimize and promote the best treatment, to obtain a sustained virological response (SVR) and therefore, reduce the progression to cirrhosis and later to hepatocellular carcinoma (HCC). The main purpose of this research was to evaluate the resistance of HBV to antivirals and show the genetic variability of HBV in a population of blood donors, carrying HBs antigen, naïve to anti-HBV treatment in Abidjan. A descriptive and analytical cross-sectional method was used to establish the molecular profile and to identify the polymorphism of HBV in treatment-naïve infected study participants. Adults blood donors, of any sex, with a positive result for HBsAg, naïve to any antiviral treatment but with an HBV viral load superior to 1000 IU/ml were included. The ABI 3130 Avant sequencer (Applied Biosystems, Courtaboeuf, France) was used to sequence the polymerase (pol) gene to determine HBV resistance genotypes. Fifty-three (N=53) blood donors infected with HBV (HBs Ag positive) were screened. All patients were naïve to any antiviral treatment. Of all these patients, 30 (56.6%) blood donors, carrying HBsAg with a viral load superior to 1000 IU/mL were included in the study. The median age was 34 years old (21-52). The median viral load was 6561 IU/mL (103 – 1.65 x 109). Two mutations of a single base, notably A181T and A181S were highlighted in this study. The A181T mutation was associated with resistance to adefovir, lamivudine and telbivudine. As for the A181S mutation, it was associated with resistance to adefovir only. Analysis of phylogenetic trees obtained by sequencing confirmed the circulation of 2 genotypes: E (22; 92%) and A (2; 8%). The circulation of genotypes A and E of HBV in Côte d'Ivoire has been confirmed by this study, with an estimated genotypic mutation prevalence of 8%. The resistance of HBV to some antiretroviral drugs in the class of HBV polymerase inhibitors, such as lamivudine (3TC), telbivudine (LdT) adefovir (ADV) may be attributed to these mutations.
    VL  - 11
    IS  - 4
    ER  - 

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Author Information
  • Center Integrated of Research Bioclinical of Abidjan (CIRBA), Abidjan, Côte d’Ivoire

  • Center Integrated of Research Bioclinical of Abidjan (CIRBA), Abidjan, Côte d’Ivoire

  • Center Integrated of Research Bioclinical of Abidjan (CIRBA), Abidjan, Côte d’Ivoire

  • Center Integrated of Research Bioclinical of Abidjan (CIRBA), Abidjan, Côte d’Ivoire

  • Center Integrated of Research Bioclinical of Abidjan (CIRBA), Abidjan, Côte d’Ivoire

  • Center Integrated of Research Bioclinical of Abidjan (CIRBA), Abidjan, Côte d’Ivoire

  • Center Integrated of Research Bioclinical of Abidjan (CIRBA), Abidjan, Côte d’Ivoire

  • Care, Research and Training Center (CePReF), Abidjan, Côte d’Ivoire

  • Biochemistry Laboratory of Medical Sciences Department, Félix Houphouët-Boigny University, Abidjan, Côte d’Ivoire

  • Pharmaceutical and Biological Sciences Department, Félix Houphouët-Boigny University, Abidjan, Côte d’Ivoire

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