Structure-Based Tetravalent Zanamivir with Potent Inhibitory Activity against Drug-Resistant Influenza Viruses----中国科学院微生物研究所

科研成果

论文题目:	Structure-Based Tetravalent Zanamivir with Potent Inhibitory Activity against Drug-Resistant Influenza Viruses
作者:	Fu Lifeng, Bi Yuhai, Wu Yan, Zhang Shanshan, Qi Jianxun, Li Yan, Lu Xuancheng, Zhang Zhenning, Lv Xun, Yan Jinghua, Gao George F, and Li Xuebing.
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刊物名称:	J Med Chem
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年份:	2016
影响因子:	5.624
论文下载:	http://pubs.acs.org/doi/abs/10.1021/acs.jmedchem.6b00537
摘要:	Zanamivir and oseltamivir are principal influenza antiviral drugs that target viral neuraminidase (NA), but resistant viruses containing mutant NAs with diminished drug affinity are increasingly emerging. Using the structural knowledge of both drug-binding sites and their spatial arrangement on the homotetrameric NA, we have developed a tetravalent zanamivir (TZ) molecule that exhibited marked increases in NA binding affinity, inhibition of NA enzyme activity, and in vitro plus in vivo antiviral efficacy over zanamivir. TZ functioned against both human seasonal H3N2 and avian H7N9 viruses, including drug-resistant mutants. Crystal structure of a resistant N9 NA in complex with TZ explained the function, which showed that four zanamivir residues simultaneously bound to all four monomers of NA. The design method of TZ described in this study may be useful to develop drugs or ligands that target proteins with multiple binding sites. The potent anti-influenza activity of TZ makes it attractive for further development.