Rapid emergence of protease inhibitor resistance in hepatitis C virus.
Rapid emergence of protease inhibitor resistance in hepatitis C virus.
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DOI:
10.1126/scitranslmed.3000544
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发表时间:
2010-05-05
影响因子:
17.1
通讯作者:
Perelson AS
中科院分区:
文献类型:
--
作者:
Rong L;Dahari H;Ribeiro RM;Perelson AS
Approximately 170 million people worldwide are infected with hepatitis C virus (HCV). Current standard therapy leads to sustained viral elimination in only about 50% of patients treated. Telaprevir, a novel HCV protease inhibitor, has demonstrated substantial antiviral activity in patients with chronic HCV infection. However, drug-resistant variants emerge at frequencies of 5 to 20% of the total virus population as early as the second day after treatment initiation. Here, using probabilistic and viral dynamic models, we show that such rapid emergence of drug resistance is expected. We calculate that all possible single and double mutant viruses preexist before treatment, and that one additional mutation is expected to arise during therapy. Examining data from a clinical trial of telaprevir therapy for HCV infection in detail, we show that our model fits the observed dynamics of both drug-sensitive and -resistant viruses, and argue that combination therapy of direct antivirals will require drug combinations that have a genetic barrier of four or more mutations.
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