Research Information System
Hepatology Forum, vol.7, no.1, pp.26-31, 2026 (Scopus)
Background and Aim: This study aimed to determine the efficacy and safety of tenofovir alafenamide fumarate (TAF) prophylaxis in hepatitis B virus (HBV)-infected or HBV-experienced individuals with benign and ma-lignant diseases receiving chemo/immunosuppressive or biological modifier therapy. Materials and Methods: This is a multicenter, observational study in which data from 13 centers were reviewed and entered into a standardized electronic case report form. Results: A total of 158 individuals who received TAF prophylaxis were included in the analysis. Before starting the prophylaxis, 51 individuals were hepatitis B surface antigen positive, while 107 were HBV-experi-enced. Thirty patients had detectable HBV DNA levels. Twelve of them had abnormal serum alanine aminotransferase levels. Forty patients were switched to TAF. Solid tumors (34%) were the most common primary disease types. The median follow-up period was 17.2 months. From baseline to the end of the follow-up period, none of the patients had clinical, biochemical, or serological evidence of HBV reactivation under TAF prophylaxis. The virological response rate was 87%. HBV suppression was well maintained after switching in the 40 patients who were switched to TAF treatment. All patients maintained their chemo/ immunosuppressive therapy without interruption. TAF prophylaxis was well tolerated. No drug discontinuation due to adverse effects was observed. No HBV-related morbidity or mortality was observed during the TAF prophylaxis. No significant differences were found in the glo-merular filtration rate change or hypophosphatemia during TAF pro-phylaxis, but the serum triglyceride levels were significantly increased (p=0.019). Conclusion: TAF prophylaxis is effective, safe, and tolerable in preventing chemo/immunosuppressive or biological modifier-induced HBV reactivation in HBV-infected or HBV-experienced individuals.