JAC Advance Access originally published online on June 10, 2005
Journal of Antimicrobial Chemotherapy 2005 56(2):265-269; doi:10.1093/jac/dki194
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Published by Oxford University Press 2005
Leading article |
Diversity of thymidine analogue resistance genotypes among newly diagnosed HIV-1-infected persons
Laboratory Branch, Division of HIV/AIDS Prevention, National Center for HIV, STD, and TB Prevention, Centers for Disease Control and Prevention, 1600 Clifton Road NE, MS G-19, Atlanta, GA 30333, USA
* Tel: +1-404-639-4987; Fax: +1-404-639-1174; E-mail: GGarcia-lerma{at}cdc.gov
The introduction of highly active antiretroviral therapy (HAART) has resulted in a significant decrease in HIV and AIDS-related mortality and morbidity. However, these treatments can select for drug-resistant viruses which are associated with poor virological responses to the antiretroviral therapy and possible loss of clinical benefit. Drug-resistant viruses can also be transmitted between individuals. In the absence of drug pressure, transmitted drug-resistant viruses gradually lose resistance mutations that confer a selective disadvantage as they evolve to more fit viruses. As a result, unusual resistance-related genotypes not commonly seen in treated patients may arise in the population. Viruses with unique patterns of thymidine analogue-associated mutations (TAMs) have now been identified in a substantial proportion of treatment-naive recently diagnosed persons. In this leading article, I discuss these findings and the potential impact of these unique reverse transcriptase (RT) genotypes on evolution of resistance and treatment responses.
Keywords: revertant viruses , fitness , virus evolution
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