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Viral suppression and cirrhosis regression with tenofovir disoproxil fumarate in Asians with chronic hepatitis B.

Author(s): Tsai NC(1), Marcellin P, Buti M, Washington MK, Lee SS, Chan S, Trinh H, Flaherty JF, Kitrinos KM, Dinh P, Charuworn P, Subramanian GM, Gane E.

Affiliation(s): Author information: (1)Department of Medicine, Queens Medical Center, University of Hawaii at Manoa, 550 S. Beretania Street, POB III #405, Honolulu, HI, 96734, USA, naoky@hawaii.edu.

Publication date & source: 2015, Dig Dis Sci. , 60(1):260-8

BACKGROUND: Chronic hepatitis B (CHB) is a major public health concern, particularly in endemic areas like Asia-Pacific. Sustained virologic suppression correlates with regression of histologic fibrosis and cirrhosis. AIM: This study evaluated efficacy and safety of tenofovir disoproxil fumarate (TDF) in Asian patients through 240 weeks of treatment. METHODS: Post hoc analysis of the Asian subpopulation from two phase 3 clinical studies was performed. Following a 48-week randomized, double-blind evaluation of once-daily TDF versus once-daily adefovir dipivoxil, open-label TDF for up to 240 weeks was evaluated. Patients with both baseline and week 240 liver biopsies were evaluated for histologic changes. RESULTS: At baseline, 189/641 (29 %) patients randomized were Asian. Sixty-eight percent of Asian patients were male; 50 % were hepatitis B e antigen (HBeAg)-positive. At week 240, similar proportions of Asian (88 %) and non-Asian (87 %) patients demonstrated improvement in liver histology, and 19/22 (86 %) Asian patients with baseline cirrhosis were no longer cirrhotic. By modified intent-to-treat analysis, 74 % of Asian patients and 76 % of non-Asian patients had HBV DNA <400 copies/mL at the end of week 240 (P = 0.602). No differences were seen in HBeAg loss or seroconversion in Asian versus non-Asian patients. No Asian patient experienced hepatitis B surface antigen loss. Safety and tolerability of TDF through week 240, including changes in renal function and in hip/spine bone mineral density (from weeks 192 to 240), were comparable between Asian and non-Asian patients. CONCLUSIONS: Long-term virologic and histologic efficacy and safety of TDF are comparable in Asian and non-Asian CHB patients.

Page last updated: 2015-08-10

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