Replication of HIV-1 under selective pressure frequently results in the evolution of virus variants that replicate more efficiently under the applied conditions. For example, in patients on antiretroviral therapy, such evolution can result in variants that are resistant to the HIV-1 inhibitors, thus frustrating the therapy. On the other hand, virus evolution can help us to understand the molecular mechanisms that underlie HIV-1 replication. For example, evolution of a defective virus mutant can result in variants that overcome the introduced defect by restoration of the original sequence or by the introduction of additional mutations in the viral genome. Analysis of the evolution pathway can reveal the requirements of the element under study and help to understand its function. Analysis of the escape routes may generate new insight in the viral life cycle and result in the identification of unexpected biological mechanisms. We have developed in vitro HIV-1 evolution into a systematic research tool that allows the study of different aspects of the viral replication cycle. We will briefly review this method of forced virus evolution and provide several examples that illustrate the power of this approach.

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This Issue

Philosophical Transactions of the Royal Society B: Biological Sciences cover image

27 June 2010

Volume 365Issue 1548

Theme Issue 'New experimental and theoretical approaches towards the understanding of the emergence of viral infections' compiled and edited by Santiago F. Elena and Rémy Froissart

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DOI:https://doi.org/10.1098/rstb.2010.0072
PubMed:20478891
Published by:Royal Society
Print ISSN:0962-8436
Online ISSN:1471-2970

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Published online27/06/2010
Published in print27/06/2010

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