Efficacy and Safety of Ombitasvir/Paritaprevir/Ritonavir ± Dasabuvir Regimen in Haemodialysis Patients With Hepatitis C Virus Infection: A Case Series

Sa？etak Background: Hepatitis C virus (HCV) infection is common among patients on haemodialysis (HD) therapy and is an important cause of morbidity and mortality. In patients with chronic kidney disease (CKD), the risks for negative outcomes are significantly higher in HCV-infected patients than in those without HCV infection, including progression to cirrhosis, hepatocellular carcinoma and liver-related mortality. Ombitasvir (OBV), paritaprevir (PTV), ritonavir (r), and dasabuvir (DSV) are all hepatically metabolized and, therefore, require no dose adjustment in patients with any degree of renal impairment. Aims: We studied the safety and efficacy of OBV/PTV/r + DSV in a small group of HCV infected patients on haemodialysis therapy. Methods: Treatment course with ombitasvir/paritaprevir/ritonavir and dasabuvir; (3-DAA regimen of OBV/PTV/r+DSV±RBV) was analysed. Pre-treatment evaluation of HCV infection included HCV RNA, genotype, and liver fibrosis assed by transient fibroelastography (FibroScan). The stage 5 CKD was defined as an eGFR of <15 mL/min/1.73 m2, respectively; those on haemodialysis were considered to have stage 5 CKD or end-stage renal disease (ESRD). Demographic data and concomitant medication were retrieved from patients’ records. The primary endpoint was sustained virologic response at post-treatment week 12 (SVR12). We collected data on on-treatment adverse events (AEs), serious AEs, and laboratory abnormalities. Results: Among 7 treated patients, 6 were male and 1 female, all were infected with genotype 1 (5 GT1b, 2 GT1a). Patient had compensated liver cirrhosis and six patients did not have liver cirrhosis, none were liver transplant recipients. All of seven patients completed 12 weeks of treatment and achieved SVR12. Concomitant medication had to be modified with the treatment initiation in 5 out of 7 patients. One of the patients presented with a significant decrease in haemoglobin level, white blood cell and platelet count during the treatment period. The most frequent adverse events were nausea, diarrhoea. Adverse events were primarily mild, and no patient discontinued treatment due to an AE. Conclusions: Treatment with OBV/PTV/r +DSV ± RBV was well-tolerated and resulted in high rates of SVR12 (100%) for patients with HCV GT1b/1a on haemodialysis