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We investigated the frequency of RAVs among patients failing to achieve SVR in two clinical trials. We also investigated the impact of interferon responsiveness on RAVs and specific baseline RAVs relationship with boceprevir treatment failure.Data are from 1020 patients enrolled into either SPRINT-2 or RESPOND-2; patients received a 4-week PR lead-in prior to receiving boceprevir or placebo. RAVs...
The HIV-1 CCR5 co-receptor is a member of the chemokine receptor family of G-protein coupled receptors; for which a number of small molecule antagonists, such as vicriviroc (VCV), have been developed to inhibit HIV-1 R5-tropic replication. In this study, we analyzed an HIV-1 subtype D envelope gene from a clinical trial subject who developed complete resistance to VCV. The HIV-1 resistant envelope...
Previous studies have demonstrated that HIV-1 develops resistance to CCR5 antagonists by gaining the ability to use drug-occupied co-receptor. However, the effects of CCR5 antagonists on the affinity of virus-co-receptor interactions have been difficult to quantify. We developed a pharmacological model for allosteric interaction at G-protein coupled receptors to analyze the effect of different CCR5...
Several small molecule drugs that bind to the host CCR5 co-receptor and prevent viral entry have been developed for the treatment of HIV-1 infection. The innate variability found in HIV-1 envelope and the complex viral/cellular interactions during entry makes defining resistance to these inhibitors challenging. Here we found that mapping determinants in the gp160 gene from a primary isolate RU570-VCV...
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