Clinical and Molecular Hepatology (Jul 2025)

Switching to besifovir in patients with chronic hepatitis B receiving tenofovir disoproxil fumarate: A randomized trial

  • Hyung Joon Yim,
  • Yeon Seok Seo,
  • Ji Hoon Kim,
  • Won Kim,
  • Young Kul Jung,
  • Jae Young Jang,
  • Sae Hwan Lee,
  • Yun Soo Kim,
  • Chang Wook Kim,
  • Hyoung Su Kim,
  • Jae-Jun Shim,
  • Eun-Young Cho,
  • In Hee Kim,
  • Byung Seok Lee,
  • Jeong-Hoon Lee,
  • Byung Seok Kim,
  • Jeong Won Jang,
  • Hyun Woong Lee,
  • Jung Hyun Kwon,
  • Moon Young Kim,
  • Do Seon Song,
  • Jung Gil Park,
  • Yoon Seok Lee,
  • Eileen L. Yoon,
  • Han Ah Lee,
  • Seong Hee Kang,
  • Jin Mo Yang

DOI
https://doi.org/10.3350/cmh.2024.0819
Journal volume & issue
Vol. 31, no. 3
pp. 810 – 822

Abstract

Read online

Background/Aims Besifovir (BSV) showed comparable antiviral activity and superior safety profiles to tenofovir disoproxil fumarate (TDF) in treatment-naïve chronic hepatitis B (CHB). However, no data are available regarding the antiviral efficacy and safety of BSV in patients with CHB who switched from long-term TDF to BSV. This study aimed to evaluate the outcome of a 48-week BSV therapy in patients with CHB who switched from long-term TDF treatment. Methods In this non-inferiority trial, 153 CHB patients treated with TDF for ≥48 weeks who had hepatitis B virus (HBV) DNA 0.999), with a predefined margin of –0.18. The mean percentage changes in estimated glomerular filtration rates were slightly better in the BSV group (1.67±11.73%) than in the TDF group (–1.24±11.02%). The BSV group showed a significant improvement in bone turnover biomarkers compared to the TDF group; accordingly, hip and spine bone mineral density increased in the BSV group. Conclusions In patients with CHB receiving long-term TDF, switching to BSV may improve renal and bone safety with non-inferior antiviral efficacy compared to that of maintaining TDF.

Keywords