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Evolution of Hepatitis B Virus Surface Gene and Protein Among Iranian Chronic Carriers From Different Provinces



Ramezani F1 ; Alavian SM2 ; Sadeghi A1 ; Khedive A1 ; Ghalichi L3 ; Norouzi M1 ; Karimzadeh H1 ; Malekzadeh R4 ; Montazeri G4 ; Nejatizadeh A5 ; Ziaee M6 ; Abedi F7 ; Ataei B8 ; Yaran M8 Show All Authors
Authors
  1. Ramezani F1
  2. Alavian SM2
  3. Sadeghi A1
  4. Khedive A1
  5. Ghalichi L3
  6. Norouzi M1
  7. Karimzadeh H1
  8. Malekzadeh R4
  9. Montazeri G4
  10. Nejatizadeh A5
  11. Ziaee M6
  12. Abedi F7
  13. Ataei B8
  14. Yaran M8
  15. Sayad B9
  16. Somi MH10
  17. Sarizadeh G11
  18. Saneimoghaddam I12
  19. Mansourghanaei F13
  20. Rafatpanah H14
  21. Keyvani H15
  22. Kalantari E16
  23. Saberfiroozi M17
  24. Rezaee R18
  25. Daram M1
  26. Mahabadi M1
  27. Goodarzi Z1
  28. Poortahmasebi V1
  29. Geravand B18
  30. Khamseh A1
  31. Mahmoodi M1
  32. Jazayeri SM1
Show Affiliations
Authors Affiliations
  1. 1. Hepatitis B Molecular Laboratory-Department of Virology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
  2. 2. Middle East Liver Diseases Center (MELD Centers), Tehran, Iran
  3. 3. Mental health research center, Iran University of Medical Sciences, Tehran, Iran
  4. 4. Digestive Disease Research Center, Tehran University of Medical Sciences, Tehran, Iran
  5. 5. Research Center for Molecular Medicine, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
  6. 6. Hepatitis Research Center, Department of Internal Medicine, Birjand University of Medical Sciences, Birjand, Iran
  7. 7. Department of Infectious Disease, Mashhad University of Medical Sciences, Iran
  8. 8. Infectious Diseases and Tropical Medicine Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
  9. 9. Kermanshah Liver Diseases and Hepatitis Research Center, Kermanshah, Iran
  10. 10. Liver and Gastrointestinal Disease Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
  11. 11. Educational Region of Khozestan Blood Transfusion Organization, Ahvaz, Iran
  12. 12. Department of Gastroenterology, Zahedan University of Medical Sciences, Zahedan, Iran
  13. 13. Gastrointestinal and Liver Diseases Research Center, Guilan University of Medical Sciences, Rasht, Iran
  14. 14. Immunology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
  15. 15. Department of Virology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
  16. 16. Gholhack medical laboratory Tehran, Iran
  17. 17. Gastroenterohepatology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
  18. 18. Ministry of Health and Medical Education, Deputy of Curative Affairs, Budget Administration, Tehran, Iran

Source: Iranian Journal of Microbiology Published:2015

Abstract

Background and Objectives: Iranian chronic HBV carrier’s population has shown a unique pattern of genotype D distribution all around the country. The aim of this study was to explore more details of evolutionary history of carriers based on structural surface proteins from different provinces. Materials and Methods: Sera obtained from 360 isolates from 12 Different regions of country were used for amplification and sequencing of surface proteins. A detailed mutational analysis was undertaken. Results: The total ratio for Missense/Silent nucleotide substitutions was 0.96. Sistan and Kermanshah showed the lowest rate of evolution between provinces (P = 0.055). On the other hand, Khorasan Razavi and Khoozestan contained the highest ratio (P = 0.055). The rest of regions were laid between these two extremes. Azarbayjan and Guilan showed the highest proportion of immune epitope distribution (91.3% and 96%, respectively). Conversely, Sistan and Tehran harbored the least percentage (66.6% and 68.8%, respectively). Kermanshah province contained only 5.2%, whereas Isfahan had 54.5% of B cell epitope distribution. In terms of T helper epitopes, all provinces showed a somehow homogeneity: 22.58% (Fars) to 46.6% (Khuzestan). On the other hand, distribution of substitutions within the CTL epitopes showed a wide range of variation between 6.6% (Khuzestan) and 63% (Kermanshah). Conclusion: Further to low selection pressure found in Iranian population, the variations between different regions designate random genetic drift within the surface proteins. These finding would have some applications in terms of specific antiviral regimen, design of more efficient vaccine and public health issues. © 2015, Tehran University of Medical Science. All rights reserved.