Long-term Safety and Efficacy of Tenofovir Amibufenamide in Patients With HBeAg-positive or HBeAg-negative Chronic Hepatitis B - a Multicenter, Open-label Follow-up Study
Long-term Safety and Efficacy of Tenofovir Amibufenamide in Patients With HBeAg-positive or HBeAg-negative Chronic Hepatitis B - a Multicenter, Open-label Follow-up Study
Tenofovir amibufenamide (TMF) is a novel prodrug of tenofovir that has been widely used in mainland China for the treatment of chronic hepatitis B (CHB). The previous registrational study (NCT03903796) has established the non-inferior virologic efficacy of TMF to tenofovir disoproxil fumarate (TDF), while demonstrating higher rates of alanine aminotransferase (ALT) normalization and improved bone and renal safety profiles. This study presented the long-term efficacy and safety of TMF in a phase IV study.
Participants from the Phase III registrational trial of TMF were enrolled and followed for another seven years, starting at week 144 in the Phase III study as the baseline. Once-daily oral dose of 25 mg TMF were maintained in all participants. Clinical assessments were conducted every 24 weeks. The primary efficacy endpoint was the percentage of patients with serum HBV DNA levels below the quantification limit at week (144+) 96.
Inclusion Criteria:
Exclusion Criteria:
1) Completion of HS-10234-301 pivotal Phase III clinical study Interruption of TMF treatment for more than 24 weeks or continuous use of alternative, commercially available hepatitis B antivirals for more than 24 weeks (Participants who have discontinued TMF for more than 24 weeks can only be enrolled in this study after investigator evaluation and confirmation) 2）Evidence of hepatocellular carcinoma (e.g. as evidenced by recent imaging). 3)significant bone disease (e.g. osteomalacia, chronic osteomyelitis, osteogenesis imperfecta, osteochrondroses), or multiple bone fractures.
4）Currently receiving therapy with immunomodulators (e.g. corticosteroids), investigational agents, nephrotoxic agents, or agents capable of modifying renal excretion.
5）Known hypersensitivity to study drugs, metabolites, or formulation excipients.
6) In the investigator's judgment, current alcohol or substance abuse may interfere with the subject's compliance with the study requirements 7）Current alcohol or substance abuse judged by the investigator to potentially interfere with participant compliance.