Hepatitis B virus S mutants in liver transplant recipients who were reinfected despite hepatitis B immune globulin prophylaxis

Hepatology : Official Journal of the American Association for the Study of Liver Diseases
M G GhanyA S Lok

Abstract

Long-term hepatitis B immune globulin (HBIG) has been shown to reduce hepatitis B virus (HBV) reinfection in patients transplanted for hepatitis B. The aim of this study was to determine the prevalence of HBV S gene mutations in liver transplant recipients who developed recurrent hepatitis B despite HBIG prophylaxis, and to determine if these mutations can revert after withdrawal of HBIG. The entire S gene sequences in pre- and posttransplant sera from 20 patients who developed recurrent hepatitis B despite HBIG prophylaxis were compared. Ten (50%) patients had 18 amino acid substitutions involving the 'a' determinant in the posttransplant samples. These mutations were absent in 93% of the pretransplantation clones analyzed. There was a significant correlation between the development of mutations in the 'a' determinant region and the duration of HBIG therapy. Most of the mutations result in changes in predicted antigenicity of the S protein. During follow-up, mutations in 14 (78%) of 18 affected codons in the 'a' determinant region reverted back to the pretransplantation sequences; only 1 codon had a de novo change after the withdrawal of HBIG. Two control patients who did not receive HBIG had no change in the 'a' determinant i...Continue Reading

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Jan 13, 1998·Hepatology : Official Journal of the American Association for the Study of Liver Diseases·S A Locarnini
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