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Wang DS, Phu A, McKee K, Strasser SI, Sheils S, Weltman M, Sellar S, Davis JS, Young M, Braund A, Farrell GC, Blunn A, Harding D, Ralton L, Muller K, Davison SA, Shaw D, Wood M, Hajkowicz K, Skolen R, Davies J, Tate-Baker J, Doyle A, Tuma R, Hazeldine S, Lam W, Edmiston N, Zohrab K, Pratt W, Watson B, Zekry A, Stephens C, Clark PJ, Day M, Park G, Kim H, Wilson M, McGarity B, Menzies N, Russell D, Lam T, Boyd P, Kok J, George J, Douglas MW. Hepatitis C Virus Antiviral Drug Resistance and Salvage Therapy Outcomes Across Australia. Open Forum Infect Dis 2024; 11:ofae155. [PMID: 38651137 PMCID: PMC11034952 DOI: 10.1093/ofid/ofae155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Accepted: 03/15/2024] [Indexed: 04/25/2024] Open
Abstract
Background Hepatitis C virus (HCV) infection can now be cured with well-tolerated direct-acting antiviral (DAA) therapy. However, a potential barrier to HCV elimination is the emergence of resistance-associated substitutions (RASs) that reduce the efficacy of antiviral drugs, but real-world studies assessing the clinical impact of RASs are limited. Here, an analysis of the impact of RASs on retreatment outcomes for different salvage regimens in patients nationally who failed first-line DAA therapy is reported. Methods We collected data from 363 Australian patients who failed first-line DAA therapy, including: age, sex, fibrosis stage, HCV genotype, NS3/NS5A/NS5B RASs, details of failed first-line regimen, subsequent salvage regimens, and treatment outcome. Results Of 240 patients who were initially retreated as per protocol, 210 (87.5%) achieved sustained virologic response (SVR) and 30 (12.5%) relapsed or did not respond. The SVR rate for salvage regimens that included sofosbuvir/velpatasvir/voxilaprevir was 94.3% (n = 140), sofosbuvir/velpatasvir 75.0% (n = 52), elbasvir/grazoprevir 81.6% (n = 38), and glecaprevir/pibrentasvir 84.6% (n = 13). NS5A RASs were present in 71.0% (n = 210) of patients who achieved SVR and in 66.7% (n = 30) of patients who subsequently relapsed. NS3 RASs were detected in 20 patients (20%) in the SVR group and 1 patient in the relapse group. NS5B RASs were observed in only 3 patients. Cirrhosis was a predictor of relapse after retreatment, as was previous treatment with sofosbuvir/velpatasvir. Conclusions In our cohort, the SVR rate for sofosbuvir/velpatasvir/voxilaprevir was higher than with other salvage regimens. The presence of NS5A, NS5B, or NS3 RASs did not appear to negatively influence retreatment outcomes.
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Affiliation(s)
- Dao Sen Wang
- Storr Liver Centre, The Westmead Institute for Medical Research, The University of Sydney and Westmead Hospital, Sydney, NSW, Australia
| | - Amy Phu
- Storr Liver Centre, The Westmead Institute for Medical Research, The University of Sydney and Westmead Hospital, Sydney, NSW, Australia
| | - Kristen McKee
- Storr Liver Centre, The Westmead Institute for Medical Research, The University of Sydney and Westmead Hospital, Sydney, NSW, Australia
| | - Simone I Strasser
- AW Morrow Gastroenterology and Liver Centre, The University of Sydney and Royal Prince Alfred Hospital, Camperdown, NSW, Australia
| | - Sinead Sheils
- AW Morrow Gastroenterology and Liver Centre, The University of Sydney and Royal Prince Alfred Hospital, Camperdown, NSW, Australia
| | - Martin Weltman
- Department of Gastroenterology and Hepatology, Nepean Hospital, Kingswood, NSW, Australia
| | - Sue Sellar
- Department of Gastroenterology and Hepatology, Nepean Hospital, Kingswood, NSW, Australia
| | - Joshua S Davis
- Department of Infectious Diseases, University of Newcastle and John Hunter Hospital, Newcastle, NSW, Australia
| | - Mel Young
- Department of Infectious Diseases, University of Newcastle and John Hunter Hospital, Newcastle, NSW, Australia
| | - Alicia Braund
- Department of Gastroenterology and Hepatology, Gold Coast University Hospital, Southport, QLD, Australia
| | - Geoffrey C Farrell
- Department of Gastroenterology and Hepatology, Australian National University and The Canberra Hospital, Canberra, ACT, Australia
| | - Anne Blunn
- Department of Gastroenterology and Hepatology, Australian National University and The Canberra Hospital, Canberra, ACT, Australia
| | - Damian Harding
- Department of Gastroenterology and Hepatology, Lyell McEwin Hospital, Elizabeth Vale, SA, Australia
| | - Lucy Ralton
- Department of Gastroenterology and Hepatology, Lyell McEwin Hospital, Elizabeth Vale, SA, Australia
| | - Kate Muller
- Department of Gastroenterology and Hepatology, Flinders Medical Centreand Flinders University, Adelaide, SA, Australia
| | - Scott A Davison
- Department of Gastroenterology and Hepatology, University of New South Wales and Liverpool Hospital, Liverpool, NSW, Australia
| | - David Shaw
- Department of Infectious Diseases, Royal Adelaide Hospital, Adelaide, SA, Australia
| | - Marnie Wood
- Infectious Diseases Unit, Royal Brisbane and Women's Hospital, Brisbane, QLD, Australia
| | - Krispin Hajkowicz
- Infectious Diseases Unit, Royal Brisbane and Women's Hospital, Brisbane, QLD, Australia
| | - Richard Skolen
- Infectious Diseases Unit, Royal Brisbane and Women's Hospital, Brisbane, QLD, Australia
| | - Jane Davies
- Menzies School of Health Research and Royal Darwin Hospital, Darwin, NT, Australia
| | - Jaclyn Tate-Baker
- Menzies School of Health Research and Royal Darwin Hospital, Darwin, NT, Australia
| | - Adam Doyle
- Department of Gastroenterology and Hepatology, Royal Perth Hospital, Perth, WA, Australia
| | - Rhoda Tuma
- Department of Gastroenterology and Hepatology, Royal Perth Hospital, Perth, WA, Australia
| | - Simon Hazeldine
- Department of Gastroenterology and Hepatology, Fiona Stanley Hospital, Murdoch, WA, Australia
| | - Wendy Lam
- Department of Gastroenterology and Hepatology, Fiona Stanley Hospital, Murdoch, WA, Australia
| | - Natalie Edmiston
- Department of Gastroenterology and Hepatology, School of Medicine, Western Sydney University, Sydney, NSW, Australia
| | - Krista Zohrab
- Department of Gastroenterology and Hepatology, School of Medicine, Western Sydney University, Sydney, NSW, Australia
| | - William Pratt
- Department of Medicine, Shoalhaven Hospital, Nowra, NSW, Australia
| | - Belinda Watson
- Department of Medicine, Shoalhaven Hospital, Nowra, NSW, Australia
| | - Amany Zekry
- Department of Gastroenterology and Hepatology, St George Hospital, Kogarah, NSW, Australia
| | - Carlie Stephens
- Department of Gastroenterology and Hepatology, St George Hospital, Kogarah, NSW, Australia
| | - Paul J Clark
- Rockhampton Blood Borne Virus & Sexual Health Service and School of Medicine, University of Brisbane, Brisbane, QLD, Australia
| | - Melany Day
- Rockhampton Blood Borne Virus & Sexual Health Service and School of Medicine, University of Brisbane, Brisbane, QLD, Australia
| | - Gordon Park
- Department of Gastroenterology and Hepatology, Royal North Shore Hospital, St Leonards, NSW, Australia
| | - Hami Kim
- Department of Gastroenterology and Hepatology, Royal North Shore Hospital, St Leonards, NSW, Australia
| | - Mark Wilson
- Department of Gastroenterology and Hepatology, Royal Hobart Hospital, Hobart, TAS, Australia
| | | | | | - Darren Russell
- Cairns Sexual Health Service and James Cook University Cairns, St Cairns City, QLD, Australia
| | - Thao Lam
- Department of Drug Health, Western Sydney Local Health District, Westmead, NSW, Australia
| | - Peter Boyd
- Department of Medicine, Cairns Hospital, Cairns, QLD, Australia
| | - Jen Kok
- Centre for Infectious Diseases and Microbiology Laboratory Services, NSW Health Pathology-Institute of Clinical Pathology and Medical Research, Westmead Hospital, Westmead, NSW, Australia
| | - Jacob George
- Storr Liver Centre, The Westmead Institute for Medical Research, The University of Sydney and Westmead Hospital, Sydney, NSW, Australia
| | - Mark W Douglas
- Storr Liver Centre, The Westmead Institute for Medical Research, The University of Sydney and Westmead Hospital, Sydney, NSW, Australia
- Centre for Infectious Diseases and Microbiology, Sydney Infectious Diseases Institute, The University of Sydney at Westmead Hospital, Sydney, NSW, Australia
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