Inhibition of hepatitis C virus replication by arsenic trioxide

Der Ren Hwang, Yuan Chin Tsai, Jin Ching Lee, Kuo Kuei Huang, Ren Kuo Lin, Chia Hua Ho, Jeng Min Chiou, Ying Ting Lin, John T A Hsu, Chau Ting Yeh

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)


Hepatitis C virus (HCV) is a serious global problem, and present therapeutics are inadequate to cure HCV infection. In the present study, various antiviral assays show that AS2O3 at submicromolar concentrations is capable of inhibiting HCV replication. The 50% effective concentration (EC50) of AS2O3 required to inhibit HCV replication was 0.35 μM when it was determined by a reporter-based HCV replication assay, and the EC50 was below 0.2 μM when it was determined by quantitative reverse transcription-PCR analysis. As2O3 did not cause cellular toxicity at this concentration, as revealed by an MTS [3-(4,5-dimethylthiozol-2-yl)-5-(3- carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium, inner salt] assay. A combination of AS2O3 and alpha interferon exerted synergistic effects against HCV, as revealed by a multiple linear logistic model and isobologram analysis. Furthermore, in an alternative HCV antiviral system that may recapitulate additional steps involved in HCV infection and replication, AS2O3 at 0.3 μM totally abolished the HCV signal, whereas alpha interferon at a high dose (5,000 IU/ml) only partially suppressed the HCV signal. The study highlights the indications for use of a novel class of anti-HCV agent. Further elucidation of the exact antiviral mechanism of AS2O3 may lead to the development of agents with potent activities against HCV or related viruses.

Original languageEnglish
Pages (from-to)2876-2882
Number of pages7
JournalAntimicrobial Agents and Chemotherapy
Issue number8
Publication statusPublished - Aug 2004
Externally publishedYes

ASJC Scopus subject areas

  • Pharmacology (medical)
  • Infectious Diseases
  • Pharmacology


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