Infections by hepatitis B surface antigen gene mutants in Europe and North America

Journal of Medical Virology
Edward Tabor

Abstract

Hepatitis B virus (HBV) mutants have usually been studied in patients in Asia because of the wider use of HBV immunization there and the resultant emergence of viral mutants. Nevertheless, HBV surface antigen (S) gene mutants also are found in Europe and North America. In Europe and North America, HBV with mutations in the portion of the S gene coding the "a" determinant of the hepatitis B surface antigen (HBsAg) have been documented in small numbers of infants born to HBV-infected mothers following post-natal HBV vaccine and hepatitis B immune globulin (HBIG) prophylaxis and in many liver transplant recipients who develop HBV re-infection despite HBIG prophylaxis. In some cases, these mutations have included a glycine to arginine substitution at position 145 (G145R), which results in a conformational change and different reactivity to monoclonal antibody reagents than that of the wild-type virus. Mutations in the a determinant (but not G145R) also have been reported in European patients with chronic HBV infection who have not received HBV vaccine or HBIG. However, it appears that such mutations are only responsible for a small proportion of "occult" or "silent" HBV infections, which are characterized by the presence of HBV DNA...Continue Reading

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Citations

Jun 8, 2007·Journal of Translational Medicine·Florian BihlChristian Brander
Dec 10, 2009·World Journal of Gastroenterology : WJG·Guang-Wen Cao
Nov 14, 2013·World Journal of Gastroenterology : WJG·Francisco Rodriguez-FriasMaria Homs
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