Anita Kohli1, Anuoluwapo Osinusi2, Zayani Sims3, Amy Nelson4, Eric G Meissner4, Lisa L Barrett5, Dimitra Bon6, Miriam M Marti4, Rachel Silk7, Colleen Kotb7, Chloe Gross7, Tim A Jolley4, Sreetha Sidharthan3, Tess Petersen3, Kerry Townsend4, D'Andrea Egerson7, Rama Kapoor7, Emily Spurlin4, Michael Sneller4, Michael Proschan8, Eva Herrmann6, Richard Kwan4, Gebeyehu Teferi9, Rohit Talwani10, Gabbie Diaz11, David E Kleiner12, Brad J Wood13, Jose Chavez9, Stephen Abbott9, William T Symonds14, G Mani Subramanian14, Phillip S Pang14, John McHutchison14, Michael A Polis4, Anthony S Fauci4, Henry Masur3, Shyam Kottilil15. 1. Critical Care Medicine Department, NIH Clinical Center, National Institutes of Health, Bethesda, MD, USA; Clinical Research Directorate/Clinical Monitoring Research Program, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research, Frederick, MD, USA. 2. Clinical Research Directorate/Clinical Monitoring Research Program, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research, Frederick, MD, USA; Department of Medicine, Dalhousie University, Halifax, NS, Canada. 3. Critical Care Medicine Department, NIH Clinical Center, National Institutes of Health, Bethesda, MD, USA. 4. Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, MD, USA. 5. Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, MD, USA; Department of Medicine, Dalhousie University, Halifax, NS, Canada. 6. Institute of Biostatistics and Mathematical Modeling, Johann Wolfgang Goethe University, Frankfurt, Germany. 7. Clinical Research Directorate/Clinical Monitoring Research Program, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research, Frederick, MD, USA. 8. Biostatistics Research Branch, National Institute of Allergy and Infectious Diseases, National Institutes of Health, MD, USA. 9. Unity Health Care, Washington DC, USA. 10. Division of Infectious Diseases, Institute of Human Virology, University of Maryland, MD, USA. 11. Clinical Research Directorate/Clinical Monitoring Research Program, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research, Frederick, MD, USA; The National Cancer Institute, National Institutes of Health, MD, USA. 12. Laboratory of Pathology, National Cancer Institute, MD, USA. 13. Center for Interventional Oncology, Radiology and Imaging Sciences, NIH Clinical Center and National Cancer Institute, MD, USA. 14. Gilead Sciences, CA, USA. 15. Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, MD, USA. Electronic address: skottilil@niaid.nih.gov.
Abstract
BACKGROUND: Direct-acting antiviral drugs have a high cure rate and favourable tolerability for patients with hepatitis C virus (HCV). Shorter courses could improve affordability and adherence. Sofosbuvir and ledipasvir with ribavirin have high efficacy when taken for 8 weeks but not for 6 weeks. We assessed whether the addition of a third direct-acting antiviral drug to sofosbuvir and ledipasvir would allow a shorter treatment duration. METHODS: In this single-centre, open-label, phase 2A trial, we sequentially enrolled treatment-naive patients with HCV genotype 1 infection into three treatment groups: 12 weeks of sofosbuvir and ledipasvir; 6 weeks of sofosbuvir, ledipasvir, and GS-9669; or 6 weeks of sofosbuvir, ledipasvir, and GS-9451. Patients and investigators were not masked to treatment assignment. The primary endpoint was the propotion of patients with sustained viral response at 12 weeks after treatment completion (SVR12), assessed by serum HCV RNA concentrations lower than 43 IU/mL (the lower limit of quantification). We did an intention-to-treat analysis for the primary endpoint and adverse events. This study is registered with ClinicalTrials.gov, number NCT01805882. FINDINGS: Between Jan 11, 2013, and Dec 17, 2013, we enrolled 60 patients, and sequentially assigned them into three groups of 20. We noted an SVR12 in all 20 patients (100%, 95% CI 83-100) allocated to sofosbuvir and ledipasvir for 12 weeks; in 19 (95%, 75-100) of the 20 patients allocated to sofosbuvir, ledipasvir, and GS-9669 for 6 weeks (one patient relapsed 2 weeks after completion of treatment); and in 19 (95%, 75-100%) of the 20 patients allocated to sofosbuvir, ledipasvir, and GS-9451 for 6 weeks (one patient was lost to follow-up after reaching sustained viral response at 4 weeks). Most adverse events were mild and no patients discontinued treatment. Two serious adverse events occurred (pain after a post-treatment liver biopsy and vertigo), both unrelated to study drugs. INTERPRETATION: In this small proof-of-concept study, two different three-drug regimens that were given for 6 weeks resulted in high cure rates for HCV infection with excellent tolerability. Addition of a third potent direct-acting antiviral drug can reduce the duration of treatment required to achieve sustained viral response in patients with chronic HCV genotype 1 infection without cirrhosis. FUNDING: National Institute of Allergy and Infectious Diseases (NIAID), National Cancer Institute and Clinical Center Intramural Program, German Research Foundation, National Institutes of Health, Gilead Sciences.
BACKGROUND: Direct-acting antiviral drugs have a high cure rate and favourable tolerability for patients with hepatitis C virus (HCV). Shorter courses could improve affordability and adherence. Sofosbuvir and ledipasvir with ribavirin have high efficacy when taken for 8 weeks but not for 6 weeks. We assessed whether the addition of a third direct-acting antiviral drug to sofosbuvir and ledipasvir would allow a shorter treatment duration. METHODS: In this single-centre, open-label, phase 2A trial, we sequentially enrolled treatment-naive patients with HCV genotype 1 infection into three treatment groups: 12 weeks of sofosbuvir and ledipasvir; 6 weeks of sofosbuvir, ledipasvir, and GS-9669; or 6 weeks of sofosbuvir, ledipasvir, and GS-9451. Patients and investigators were not masked to treatment assignment. The primary endpoint was the propotion of patients with sustained viral response at 12 weeks after treatment completion (SVR12), assessed by serum HCV RNA concentrations lower than 43 IU/mL (the lower limit of quantification). We did an intention-to-treat analysis for the primary endpoint and adverse events. This study is registered with ClinicalTrials.gov, number NCT01805882. FINDINGS: Between Jan 11, 2013, and Dec 17, 2013, we enrolled 60 patients, and sequentially assigned them into three groups of 20. We noted an SVR12 in all 20 patients (100%, 95% CI 83-100) allocated to sofosbuvir and ledipasvir for 12 weeks; in 19 (95%, 75-100) of the 20 patients allocated to sofosbuvir, ledipasvir, and GS-9669 for 6 weeks (one patient relapsed 2 weeks after completion of treatment); and in 19 (95%, 75-100%) of the 20 patients allocated to sofosbuvir, ledipasvir, and GS-9451 for 6 weeks (one patient was lost to follow-up after reaching sustained viral response at 4 weeks). Most adverse events were mild and no patients discontinued treatment. Two serious adverse events occurred (pain after a post-treatment liver biopsy and vertigo), both unrelated to study drugs. INTERPRETATION: In this small proof-of-concept study, two different three-drug regimens that were given for 6 weeks resulted in high cure rates for HCV infection with excellent tolerability. Addition of a third potent direct-acting antiviral drug can reduce the duration of treatment required to achieve sustained viral response in patients with chronic HCV genotype 1 infection without cirrhosis. FUNDING: National Institute of Allergy and Infectious Diseases (NIAID), National Cancer Institute and Clinical Center Intramural Program, German Research Foundation, National Institutes of Health, Gilead Sciences.
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