Archives of Virology

, Volume 159, Issue 11, pp 2893–2899 | Cite as

Mutations in the NS5A gene of hepatitis C virus subtype 1b and response to peg-IFNα-2a/RBV combination therapy in Azerbaijani patients

  • Farah Bokharaei-Salim
  • Hossein KeyvaniEmail author
  • Mostafa Salehi-Vaziri
  • Farzin Sadeghi
  • Seyed Hamidreza Monavari
  • Leila Mehrnoush
  • Seyed Moayed Alavian
Original Article


Hepatitis C virus (HCV) infection is one of the major causes of chronic liver disease throughout the world. The presence of mutations in different regions of the HCV subtype 1b (HCV-1b) nonstructural 5A (NS5A) gene may be associated with response to interferon therapy. This study evaluated whether amino acid substitutions in the NS5A protein of HCV-1b correlated with response to pegylated interferon alfa-2a (peg-IFNα-2a) and ribavirin (RBV) combination therapy in Azerbaijani patients. From March 2010 to April 2014, a total of 34 chronically HCV-1b-infected Azerbaijani patients were enrolled in this prospective study. After extraction of RNA from plasma specimens, the entire sequences of the NS5A gene of HCV was amplified by reverse transcription nested polymerase chain reaction (RT-nested PCR), and the PCR products were sequenced subsequently. The data that were obtained revealed that there was no correlation between the response to HCV combination therapy and the number of mutations in the NS5A-PKRBD, NS5A-ISDR, and NS5A-V3 regions of HCV. It also was found that changes from isoleucine to valine (I2252 V), aspartic acid to glutamic acid (D2257), arginine to lysine (R2269 K), and arginine to glycine in NS5A-PKRBD and from glycine to glutamic acid (G2379E) in the NS5A-V3 region were not associated with HCV treatment outcome. This study showed that genetic variability in the NS5A-PKRBD, NS5A-ISDR, and NS5A-V3 regions is not a predictive factor of SVR, NR or relapse in HCV genotype1b treated with peg-IFNα-2a/RBV combination therapy.


Sustained Virological Response NS5A Protein NS5A Region Cobas Amplicor Monitor Reverse Transcription Nest Polymerase Chain 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



This study was supported by Research Deputy of Iran University of Medical Sciences, grant number 15927.

Conflict of interest

The authors have no conflict(s) of interest.


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Copyright information

© Springer-Verlag Wien 2014

Authors and Affiliations

  • Farah Bokharaei-Salim
    • 1
  • Hossein Keyvani
    • 1
    Email author
  • Mostafa Salehi-Vaziri
    • 2
  • Farzin Sadeghi
    • 2
  • Seyed Hamidreza Monavari
    • 3
  • Leila Mehrnoush
    • 4
    • 5
  • Seyed Moayed Alavian
    • 4
    • 5
  1. 1.Department of VirologyIran University of Medical SciencesTehranIran
  2. 2.Department of VirologyTehran University of Medical SciencesTehranIran
  3. 3.Departments of Virology and Anti Microbial Resistant Research CenterIran University of Medical SciencesTehranIran
  4. 4.Middle East Liver Disease CenterTehranIslamic Republic of Iran
  5. 5.Iran Hepatitis NetworkTehranIran

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