# Treatment with Direct-Acting Antivirals in Patients with HCV Infection After Liver Transplantation

## TL;DR

This study shows that direct-acting antivirals are highly effective and safe for treating hepatitis C in liver transplant patients in real-world settings.

## Contribution

The study provides real-world evidence on DAA effectiveness and safety in liver transplant recipients with chronic HCV.

## Key findings

- 96.4% of patients achieved sustained virologic response in intention-to-treat analysis.
- Treatment was well tolerated with only five serious adverse events reported.
- No significant differences in effectiveness or safety were found based on time since transplantation.

## Abstract

Background/Objectives: Direct-acting antivirals (DAAs) have revolutionized the management of chronic hepatitis C virus (HCV) infection. However, real-world data on the effectiveness and safety of DAA therapy in patients with history orthotopic liver transplantation (OLTx) remain limited. This study aimed to evaluate the clinical characteristics, effectiveness, and safety of DAA therapy in liver transplant recipients with chronic hepatitis C in a nationwide, real-world cohort. Methods: A retrospective analysis was performed of all consecutive adult patients who underwent OLTx before starting DAA therapy between July 2015 and December 2024 within the EpiTer-2 project, which included 20,586 patients treated because of chronic hepatitis C. Results: A total of 141 patients participated in the study, with most of them being men (66%) and aged 50 years or older. Most patients (80%) had comorbidities, and nearly a quarter of the population had cirrhosis of the transplanted liver at the start of antiviral therapy. The median time from OLTx to initiation of antiviral therapy was 24 months. Overall, SVR was achieved in 96.4% of patients in the intention-to-treat analysis and in 98.6% after excluding patients lost to follow-up. The treatment was well tolerated. Serious adverse events were reported in five patients. During DAA treatment and 12 weeks of follow-up after treatment, two deaths were reported. Subgroup analysis by time from OLTx to antiviral therapy (≤24 vs. >24 months) revealed no differences in effectiveness and safety despite some baseline clinical variations. Conclusions: DAA therapy in liver transplant recipients with chronic HCV infection is highly effective and well-tolerated.