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Prolonged Persistence of Lamivudine-resistant Mutant and Emergence of New Lamivudine-resistant Mutants Two Years After Lamivudine Withdrawal in HBsAg-positive Chronic Hepatitis Patient: A Case Report

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Abstract

Lamivudine can select resistant hepatitis B virus (HBV) tyrosine-methionine-aspartate-aspartate aminoacid motif (YMDD) mutants, which usually disappear in few months after lamivudine withdrawal. We report an unusual case of a male adult patient who showed a prolonged persistence of the M204I mutation up to 24 months after lamivudine withdrawal followed by the emergence of new distinct YMDD mutants (namely M204V, V207L). Only 42 months after lamivudine withdrawal wild-type YMDD motif became dominant over the YMDD mutants. To our knowledge, a so prolonged persistence of a YMDD mutant and also the emergence of new YMDD mutants many months after drug withdrawal are unusual.

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Authors and Affiliations

  1. Dept. of Public Medicine and Social Security, Section of Infectious Diseases, University of Naples Federico II, Naples, Italy

    R. Orlando, G. Tosone & M. Piazza

  2. Dept. of Biology and Cellular Molecular Pathology, University of Naples Federico II, Naples, Italy

    G. Portella, E. Veropalumbo & M. D’Onofrio

  3. Malattie Infettive-Università degli studi di Napoli Federico II, Via Sergio Pansini 5, 80131, Napoli, Italy

    R. Orlando

Authors
  1. R. Orlando
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  2. G. Tosone
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  3. G. Portella
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  4. E. Veropalumbo
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  5. M. D’Onofrio
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  6. M. Piazza
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Correspondence to R. Orlando.

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Orlando, R., Tosone, G., Portella, G. et al. Prolonged Persistence of Lamivudine-resistant Mutant and Emergence of New Lamivudine-resistant Mutants Two Years After Lamivudine Withdrawal in HBsAg-positive Chronic Hepatitis Patient: A Case Report. Infection 36, 472–474 (2008). https://doi.org/10.1007/s15010-007-7073-0

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  • DOI: https://doi.org/10.1007/s15010-007-7073-0

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