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- 저자 : ( Curtis L. Cooper ) (검색결과 1 건)
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( Christoph Sarrazin ),( Curtis L. Cooper ),( Michael P. Manns ),( Rajender Reddy ),( Kris Kowdley ),( Sooji Lee ),( Hadas Dvory-Sobol ),( Evguenia Svarovskia ),( Ross Martin ),( Gregory Camus ),( Bri 대한간학회 2017 춘·추계 학술대회 (KASL) Vol.2017 No.1
Aims: The pangenotypic combination of sofosbuvir (SOF) /velpatasvir (VEL)/voxilaprevir(VOX), inhibit distinct HCV targets, the NS5B polymerase, the NS5A protein, and NS3/4A protease, respectively. In Phase 3 studies, SOF/VEL/VOX administered for 12weeks demonstrated a 96% SVR12 rate in NS5A inhibitor-experienced patients in POLARIS-1, and a 97% SVR12 rate in DAA-experienced patient who had not previously received an NS5A inhibitor in POLARIS-4. Here, we evaluate the effect of baseline resistance associated substitutions (RASs) on treatment outcome and the emergence of RASs in patients who experienced virologic failure. Methods: NS3, NS5A, and NS5B deep sequencing was performed at baseline for all patients and at the time of virologic failure. NS3 and NS5A class RASs as well as VOX or VEL-specific RASs that confer >2.5-fold changes in EC50 were evaluated. Results: In POLARIS-1, 79% of NS5A inhibitor-experienced patients (205/260) had baseline NS3 and/or NS5A class RASs. Of these, 75% (196/260) had baseline NS5A RASs, the most common RASs. The SVR12 rates were similar in subjects with or without NS3 and/or NS5A class RASs, and with or without VOX or VEL-specific RASs(Table 1). RASs at NS5A position Y93 were present in 25% of patients, of whom 63(95%) achieved SVR12; all patients with ≥2 NS5A RASs achieved SVR12 (n=77). 95%(18/19) of patients with NS5B nucleoside inhibitor(NI) RASs achieved SVR12; 2 patients had S282T at baseline and achieved SVR12. In POLARIS-4, the overall prevalence of baseline NS3 and/or NS5A class RASs was 47%(83/178) and all achieved SVR12. All patients with. Conclusions: Baseline RASs had no impact on response in DAA-experienced patients following treatment with SOF/VEL/VOX for 12 weeks. Viral relapse was not associated with emergence of viral resistance.
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