Real-world safety and effectiveness of ombitasvir/paritaprevir/ritonavir ± dasabuvir ± ribavirin in hepatitis C virus genotype 1- and 4-infected patients with diverse comorbidities and comedications: A pooled analysis of post-marketing observational studies from 13 countries

Experience with direct-acting antivirals in genotype 1-5 infected chronic hepatitis C patients in Turkey

BACKGROUND

Hepatitis C virus (HCV) can cause chronic liver disease, hepatic cirrhosis, hepatocellular carcinoma, liver transplantation, and death. Early diagnosis and treatment are thus vital.

OBJECTIVES

We aimed to investigate the sustained virological response (SVR) rates in chronic hepatitis C patients infected with different genotypes, receiving different direct-acting antiviral treatments (DAAs).

DESIGN

Retrospective, observational SETTING: Clinic for infectious diseases and clinical microbiology PATIENTS AND METHODS: Patients diagnosed with chronic hepatitis C who applied to our outpatient clinic between January 2016 and November 2022 and were treated with a DAA were included in the study. Treatment responses were evaluated after each patient was treated with either ledipasvir plus sofosbuvir (LDV/SOF), LDV/SOF + ribavirin (RBV), SOF+RBV, ombitasvir/paritaprevir/ritonavir plus dasabuvir (OBV/PTV/r±DSV) ±RBV, or glecaprevir plus pibrentasvir (GLE/PIB).

MAIN OUTCOME MEASURES

Sustained virological response (SVR) rates at 12 weeks (SVR12) post-treatment.

SAMPLE SIZE

360 patients.

RESULTS

Of 360 patients who met the inclusion criteria, 218 (60.6%) were male and 142 (39.4%) were female with no statistically significant differences in SVR between sexes (P=.252). Nearly all had a SVR (n=353, 98.1%). The median (IQR) age of the patients was 56 (30.3) years. There were 42 (11.7%), 199 (55.3%), 4 (1.1%), 106 (29.4%), 8 (2.2%) and 1 (0.3%) patient with genotypes 1a, 1b, 2, 3, 4 and 5, respectively, and SVR12 did not differ significantly between genotypes (P=.066). SVR12 response was higher in 246 (68.3%) non-injecting drug users compared to 114 (31.7%) injecting drug users (P=.005). The SVR12 response was achieved in 100% of patients with genotypes 1a, 2, 4, and 5. SVR12 response could not be obtained in 1 of 199 genotype 1b patients and 6 of 106 genotype 3 patients. The common feature of 6 reinfection patients with genotype 3 was that they were using intravenous drugs. These 6 patients were reinfected due to their continued intravenous drug use.

CONCLUSION

In conclusion, DAAs provide high SVR12 rates in cirrhotic/non-cirrhotic, pegylated interferon-naive/experienced patient groups and in patients infected with all genotypes. DAAs have a high SVR12 rate in patients with chronic hepatitis C.

LIMITATIONS

Retrospective, single-center.

Decade of optimizing therapy with direct-acting antiviral drugs and the changing profile of patients with chronic hepatitis C

Chronic infection with the hepatitis C virus (HCV) remains a major health problem affecting approximately 58 million people worldwide. In the era of interferon (IFN)-based regimens, patients particularly infected with genotypes 1 and 4 achieved a low response rate. The implementation of direct-acting antivirals changed the landscape of HCV treatment. The increase in effectiveness provided us with the hope of eliminating HCV as a significant public threat by 2030. In the following years, there was an observed improvement in the treatment of HCV with genotype-specific regimens and highly effective pangenotypic options that are the most recent stage of the revolution. The optimization of therapy was accompanied by changes in the patient profile from the beginning of the IFN-free era over time. Patients treated with antiviral therapies were younger in successive periods, less burdened with comorbidities and comedications, more frequently treatment-naïve and had less advanced liver disease. Before the IFN-free era, specific subpopulations such as patients with HCV/HIV coinfection, those with a history of previous treatment, patients with renal impairment or with cirrhosis had lower chances for a virologic response. Currently, these populations should no longer be considered difficult to treat. Despite the high effectiveness of HCV therapy, there is a small percentage of patients with treatment failure. However, they can be effectively retreated with pangenotypic rescue regimens.

Five-Year Follow-Up of Cured HCV Patients under Real-World Interferon-Free Therapy

(1) Background: Treatment of hepatitis C virus (HCV) infections with direct-acting antivirals (DAA) has demonstrated high efficacy and an excellent safety profile. The cured patients showed a sustained virological response and improved liver function, but also a continued risk of hepatocellular carcinoma (HCC) during the 2-3 years of follow-up after treatment; (2) Methods: A total of 192 patients out of 209 of the primary AMBER study were analyzed five years after treatment with ombitasvir/paritaprevir/ritonavir with or without dasabuvir and with or without ribavirin. Results: We confirmed that HCV clearance after DAA treatment is stable regardless of baseline liver fibrosis. We found that sustained virologic response is associated with a gradual but significant reduction in liver stiffness over 5 years. Liver function improved during the first 2 years of follow-up and remained stable thereafter. The risk of death due to HCC as well as death due to HCV persists through 5 years of follow-up after successful DAA treatment. However, in non-cirrhotic patients, it appears to clear up 3 years after treatment; (3) Conclusions: Monitoring for more than 5 years after curing HCV infection is necessary to assess the long-term risk of possible development of HCC, especially in patients with cirrhosis of the liver.

Liver cT1 decreases following direct-acting antiviral therapy in patients with chronic hepatitis C virus

PURPOSE

Direct-acting antiviral therapies (DAAs) for treatment of chronic hepatitis C virus (HCV) have excellent rates of viral eradication, but their effect on regression of liver fibrosis is unclear. The primary aim was to use magnetic resonance imaging (MRI) and spectroscopy (MRS) to evaluate changes in liver fibrosis, liver fat and liver iron content (LIC) in patients with chronic HCV following treatment with DAAs.

METHODS

In this prospective study, 15 patients with chronic HCV due to start treatment with DAAs and with transient elastography (TE) > 8 kPa were recruited consecutively. Patients underwent MRI and MRS at baseline (before treatment), and at 24 weeks and 48 weeks after the end of treatment (EoT) for the measurement of liver cT1 (fibroinflammation), liver fat and T2* (LIC).

RESULTS

All patients achieved a sustained virological response. Liver cT1 showed significant decreases from baseline to 24 weeks post EoT (876 vs 806 ms, p = 0.002, n = 15), baseline to 48 weeks post EoT (876 vs 788 ms, p = 0.0002, n = 13) and 24 weeks post EoT to 48 weeks post EoT (806 vs 788 ms, p = 0.016, n = 13). Between baseline and 48 weeks EoT significant reduction in liver fat (5.17% vs 2.65%, p = 0.027) and an increase in reported LIC (0.913 vs 0.950 mg/g, p = 0.021) was observed.

CONCLUSION

Liver cT1 decreases in patients with chronic HCV undergoing successful DAA treatment. The relatively fast reduction in cT1 suggests a reduction in inflammation rather than regression of fibrosis.

Glecaprevir/pibrentasvir is safe and effective in hepatitis C patients with cirrhosis: Real-world data from the German Hepatitis C-Registry

Glecaprevir/pibrentasvir is a pangenotypic direct-acting antiviral regimen approved for treating chronic hepatitis C virus. Real-world use of protease-inhibitor-containing regimens requires further evaluation in patients with cirrhosis. We evaluated the real-world safety and effectiveness of glecaprevir/pibrentasvir in patients with cirrhosis from the German Hepatitis C-Registry who initiated treatment between 2 August 2017 and 30 June 2019. Overall, 131 patients received 12-week (on-label) treatment and 51 received 8-week (off-label) treatment. No patient discontinued treatment due to adverse events. Four patients had serious adverse events; none were considered related to glecaprevir/pibrentasvir. Two patients had total bilirubin > 5 × upper limit of normal (ULN) during treatment. Three patients had alanine aminotransferase and three patients had aspartate aminotransferase > 3 × ULN. Rates of sustained virologic response were 100% (86/86) for 86 patients with available data. Glecaprevir/pibrentasvir treatment was well-tolerated and highly effective in patients with chronic hepatitis C and cirrhosis in real-world practice.