Christoph Sarrazin1, Curtis L Cooper2, Michael P Manns3, K Rajender Reddy4, Kris V Kowdley5, Stuart K Roberts6, Hadas Dvory-Sobol7, Evguenia Svarovskia8, Ross Martin8, Gregory Camus8, Brian P Doehle8, Luisa M Stamm8, Robert H Hyland8, Diana M Brainard8, Hongmei Mo8, Stuart C Gordon9, Marc Bourliere10, Stefan Zeuzem11, Steven L Flamm12. 1. Medizinische Klinik 1, Goethe University Hospital, Frankfurt, Germany; St. Josefs-Hospital, Wiesbaden, Germany. 2. University of Ottawa, Ottawa, Ontario, Canada. 3. Hannover Medical School, Hannover, Germany. 4. University of Pennsylvania, Philadelphia, PA, USA. 5. Swedish Medical Center, Seattle, WA, USA. 6. Alfred Health Gastroenterology Department and Monash University Melbourne, Australia. 7. Gilead Sciences, Inc, Foster City, CA, USA. Electronic address: Hadas.Dvory-Sobol@Gilead.com. 8. Gilead Sciences, Inc, Foster City, CA, USA. 9. Henry Ford Health System, Detroit, MI, USA. 10. Hôpital Saint Joseph, Marseilles, France. 11. Medizinische Klinik 1, Goethe University Hospital, Frankfurt, Germany. 12. Northwestern Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.
Abstract
BACKGROUND & AIMS: In phase III studies, the fixed dose combination of sofosbuvir/velpatasvir/voxilaprevir (SOF/VEL/VOX) administered for 12 weeks led to a sustained virologic response at 12 weeks (SVR12) in 96% of NS5A inhibitor-experienced patients, and an SVR12 rate of 98% in DAA-experienced patients who had not previously received an NS5A inhibitor. Herein, we evaluate the relationship between the presence of detectable resistance-associated substitutions (RASs) at baseline and treatment outcome, and whether RASs were selected for in cases of virologic failure. METHODS: NS3, NS5A, and NS5B deep sequencing analyses were performed at baseline for all patients and at the time of virologic failure. Results are reported using a 15% cut-off. RESULTS: A total of 82.7% of NS5A inhibitor-experienced patients (205/248) had baseline NS3 and/or NS5A RASs; 79% had baseline NS5A RASs. SVR12 rates were similar in patients with or without NS3 and/or NS5A RASs, and with or without VOX- or VEL-specific RASs. RASs at NS5A position Y93 were present in 37.3% of patients and 95% achieved SVR12. All patients with ≥2 NS5A RASs achieved SVR12. Baseline NS3 and/or NS5A RASs were present in 46.6% (83/178) of non-NS5A inhibitor DAA-experienced patients, all of whom achieved SVR12. All patients with baseline NS5B nucleoside inhibitor RASs, including two patients with S282T, achieved SVR12. Treatment-selected resistance was seen in one of seven patients who relapsed. CONCLUSIONS: Baseline RASs had no impact on virologic response in DAA-experienced patients following treatment with SOF/VEL/VOX for 12 weeks. Selection of viral resistance with virologic relapse was uncommon. LAY SUMMARY: In phase III studies, 12 weeks of treatment with the combination of sofosbuvir, velpatasvir and voxilaprevir (SOF/VEL/VOX) cured 97% of patients with hepatitis C virus who failed prior treatment with direct-acting antiviral drugs. Herein, we show that the presence of pretreatment drug resistance did not affect treatment outcome in these patients who had previously received direct-acting antivirals. We also showed that new drug resistance was rare in patients who failed treatment with SOF/VEL/VOX for 12 weeks. This has important implications for the selection of best retreatment strategies for these patients.
BACKGROUND & AIMS: In phase III studies, the fixed dose combination of sofosbuvir/velpatasvir/voxilaprevir (SOF/VEL/VOX) administered for 12 weeks led to a sustained virologic response at 12 weeks (SVR12) in 96% of NS5A inhibitor-experienced patients, and an SVR12 rate of 98% in DAA-experienced patients who had not previously received an NS5A inhibitor. Herein, we evaluate the relationship between the presence of detectable resistance-associated substitutions (RASs) at baseline and treatment outcome, and whether RASs were selected for in cases of virologic failure. METHODS: NS3, NS5A, and NS5B deep sequencing analyses were performed at baseline for all patients and at the time of virologic failure. Results are reported using a 15% cut-off. RESULTS: A total of 82.7% of NS5A inhibitor-experienced patients (205/248) had baseline NS3 and/or NS5A RASs; 79% had baseline NS5A RASs. SVR12 rates were similar in patients with or without NS3 and/or NS5A RASs, and with or without VOX- or VEL-specific RASs. RASs at NS5A position Y93 were present in 37.3% of patients and 95% achieved SVR12. All patients with ≥2 NS5A RASs achieved SVR12. Baseline NS3 and/or NS5A RASs were present in 46.6% (83/178) of non-NS5A inhibitor DAA-experienced patients, all of whom achieved SVR12. All patients with baseline NS5B nucleoside inhibitor RASs, including two patients with S282T, achieved SVR12. Treatment-selected resistance was seen in one of seven patients who relapsed. CONCLUSIONS: Baseline RASs had no impact on virologic response in DAA-experienced patients following treatment with SOF/VEL/VOX for 12 weeks. Selection of viral resistance with virologic relapse was uncommon. LAY SUMMARY: In phase III studies, 12 weeks of treatment with the combination of sofosbuvir, velpatasvir and voxilaprevir (SOF/VEL/VOX) cured 97% of patients with hepatitis C virus who failed prior treatment with direct-acting antiviral drugs. Herein, we show that the presence of pretreatment drug resistance did not affect treatment outcome in these patients who had previously received direct-acting antivirals. We also showed that new drug resistance was rare in patients who failed treatment with SOF/VEL/VOX for 12 weeks. This has important implications for the selection of best retreatment strategies for these patients.
Authors: Mark W Douglas; Enoch S E Tay; Dao Sen Wang; Adrian T L Ong; Caroline Wilson; Amy Phu; Jen Kok; Dominic E Dwyer; Rowena A Bull; Andrew R Lloyd; Tanya L Applegate; Gregory J Dore; Anita Y Howe; Richard Harrigan; Jacob George Journal: Hepatol Commun Date: 2020-04-06
Authors: Stephanie Popping; Valeria Cento; Carole Seguin-Devaux; Charles A B Boucher; Adolfo de Salazar; Eva Heger; Orna Mor; Murat Sayan; Dominique Salmon-Ceron; Nina Weis; Henrik B Krarup; Robert J de Knegt; Oana Săndulescu; Vladimir Chulanov; David A M C van de Vijver; Federico García; Francesca Ceccherini-Silberstein Journal: Viruses Date: 2021-12-22 Impact factor: 5.048