12 April 2018, Paris, France: The results of the first real-world studies assessing the effectiveness and safety of glecaprevir/pibrentasvir (G/P) in patients with chronic hepatitis C virus (HCV) infection have confirmed high rates of viral suppression and a favourable safety profile in patients receiving 8-16 weeks of treatment. Two real-world studies from Italy and Germany which will be presented at this week's International Liver Congress™ 2018 in Paris, France, reported high rates of sustained virological response (SVR), defined as undetectable HCV RNA, at 4 and 12 weeks after the end of treatment.
'The efficacy and safety of G/P as a treatment for HCV-infected patients have so far only been evaluated in controlled clinical trials', explained Dr Roberta D'Ambrosio from the University of Milan in Italy. 'Our real-world study involving more than 700 patients with chronic HCV infection confirmed that the effectiveness and safety profile of G/P were excellent across a range of different patient types'.
Glecaprevir (an NS3/4A protease inhibitor) coformulated with pibrentasvir (an NS5A inhibitor) is a relatively new direct-acting antiviral (DAA) combination that was approved in multiple countries during 2017 for the treatment of chronic HCV infection in adults.1 Phase 2 and 3 studies involving tightly defined patient groups with HCV infection have reported high rates of SVR12 and a favourable safety profile.1-6 Until now, no real-world studies with G/P in broader groups of patients with HCV infection have been reported.
The Italian study being presented this week is an interim analysis evaluating the outcomes of 723 consecutively treated patients within the Lombardy Navigator-II Network, with G/P administered according to the drug label. Of those with available data, 99.7% achieved SVR4 (346/347). HCV RNA was reported to be undetectable in 74% of patients at Week 4, and in 98% of patients at end of treatment for the entire cohort. The prevalence of treatment-related adverse events was low, mainly of mild severity, and only three patients discontinued G/P treatment prematurely.
The ongoing German real-world study, also being reported this week, evaluated 638 patients from the German Hepatitis C-Registry (DHC-R) who received G/P treatment according to the local label. Adult patients with HCV genotypes 1-6, with or without compensated cirrhosis, who were either treatment-naïve or treatment-experienced were included in this interim analysis. The majority of patients were treatment-naïve without cirrhosis and treated with 8 weeks of G/P.
According to Prof. Dr Thomas Berg from the University of Leipzig in Germany, who will present the study findings in Paris, among the 49 patients with available data, 100% achieved SVR12, excluding four patients who prematurely discontinued treatment for reasons other than virological failure. Of those four patients, two discontinued treatment due to adverse events. No grade 3 or higher elevations in alanine aminotransferase (ALT) have been observed.
'Our real-world study in patients receiving G/P in everyday clinical practice has yielded favourable effectiveness and safety results that were consistent with the clinical trial data', said Prof. Dr Thomas Berg. 'We have found G/P to be a very useful addition to our HCV treatment armamentarium as it simplifies treatment decisions for the majority of patients; G/P has the potential to expand the treated population and support the goal of HCV elimination'.
'These data are important because they confirm the high cure rates of more than 98% observed in Phase 3 trials', said Prof. Markus Cornberg from the Hannover Medical School, Germany, and EASL Governing Board Member. '8 weeks of therapy is possible for all naïve, non-cirrhotic patients, regardless of genotype, and although we still lack data in some difficult-to-treat genotype 3 patients, prevalence of these seems to be declining as shown by the German registry'.
About The International Liver Congress™
This annual congress is the biggest event in the EASL calendar, attracting scientific and medical experts from around the world to learn about the latest in liver research. Attending specialists present, share, debate and conclude on the latest science and research in hepatology, working to enhance the treatment and management of liver disease in clinical practice. This year, the congress is expected to attract approximately 10,000 delegates from all corners of the globe. The International Liver Congress™ 2018 will take place from 11¬-15 April 2018 at the Paris Convention Centre, Paris, France.
About The European Association for the Study of the Liver (EASL)
Since its foundation in 1966, this not-for-profit organization has grown to over 4,000 members from all over the world, including many of the leading hepatologists in Europe and beyond. EASL is the leading liver association in Europe, having evolved into a major European association with international influence, and with an impressive track record in promoting research in liver disease, supporting wider education and promoting changes in European liver policy.
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Onsite location reference
Session title: General Session II and Award Ceremony I
Time, date and location of session: 08.30-10.30, Friday 13 April 2018, Main Plenary
Presenter: Thomas Berg, Germany
Abstract: First real-world data on safety and effectiveness of glecaprevir/pibrentasvir for the treatment of patients with chronic hepatitis C virus infection: data from the German Hepatitis C-Registry
Session title: General Session III and Award Ceremony II
Time, date and location of session: 10.00-12.00, Saturday 14 April 2018, Main Plenary
Presenter: Roberta D'Ambrosio, Italy
Abstract: Real-life effectiveness and safety of glecaprevir/pibrentasvir among 723 Italian patients with chronic hepatitis C: the Navigator-II study
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4. Forns X, et al. Glecaprevir plus pibrentasvir for chronic hepatitis C virus genotype 1, 2, 4, 5, or 6 infection in adults with compensated cirrhosis (EXPEDITION-1): a single-arm, open-label, multicentre phase 3 trial. Lancet Infect Dis. 2017;17(10):1062-8.
5. Asselah T, et al. Efficacy of glecaprevir/pibrentasvir for 8 or 12 weeks in patients with hepatitis C virus genotype 2, 4, 5, or 6 infection without cirrhosis. Clin Gastroenterol Hepatol. 2018;16(3):417-26.
6. Kwo PY, et al. Glecaprevir and pibrentasvir yield high response rates in patients with HCV genotype 1-6 without cirrhosis. J Hepatol. 2017;67(2):263-71.