Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.antiviral.2006.02.007
Title: Synthesis and the biological evaluation of 2-benzenesulfonylalkyl-5-substituted-sulfanyl-[1,3,4]-oxadiazoles as potential anti-hepatitis B virus agents
Authors: Chen, Y. 
Kong, K.H.
Ang, T.H.
Lam, Y. 
Tan, T.M.C. 
Bai, J. 
Li, Y.
Lim, S.G. 
Keywords: Antiviral activity
Hepatitis B virus
Hepatitis B virus-e antigen
Hepatitis B virus-s antigen
Oxadiazoles
Issue Date: 2006
Source: Chen, Y., Kong, K.H., Ang, T.H., Lam, Y., Tan, T.M.C., Bai, J., Li, Y., Lim, S.G. (2006). Synthesis and the biological evaluation of 2-benzenesulfonylalkyl-5-substituted-sulfanyl-[1,3,4]-oxadiazoles as potential anti-hepatitis B virus agents. Antiviral Research 71 (1) : 7-14. ScholarBank@NUS Repository. https://doi.org/10.1016/j.antiviral.2006.02.007
Abstract: Current treatments for chronic hepatitis B virus (HBV) infection include the use of interferon-α and of nucleoside analogs lamivudine, adefovir and entecavir. However, the use of interferon-α has many side effects while that of nucleosidic inhibitors can lead to the emergence of resistant viruses. Hence, new drugs for the treatment of HBV infection are still highly desired. Oxadiazoles have been observed to exhibit antiviral activities against RNA viruses. In this study, a facile synthesis of 2-benzenesulfonylalkyl-5-substituted-sulfanyl-[1,3,4]-oxadiazoles is reported. The compounds were then evaluated for their anti-HBV activity. 1-{2-[5-(1-Benzenesulfonyl-propyl)-[1,3,4]oxadiazol-2-yl-sulfanyl]-ethyl}-4-(2-methoxy-phenyl)-piperazine (1i) was able to inhibit the expression of the viral antigens, HBsAg and HBeAg in a concentration-dependent manner with no cytotoxic effects and without any effects on the expression of viral transcripts. Concentration- and time-dependent reductions in virion production were also observed. The inhibition of virion production was comparable to that of lamivudine and EC50 values of 1.63 and 2.96 μM were obtained for compound 1i and lamivudine, respectively. Thus, in addition to the antiviral effects on RNA viruses, oxadiazoles also have anti-HBV activities. © 2006 Elsevier B.V. All rights reserved.
Source Title: Antiviral Research
URI: http://scholarbank.nus.edu.sg/handle/10635/27081
ISSN: 01663542
DOI: 10.1016/j.antiviral.2006.02.007
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