期刊
JOURNAL OF MEDICINAL CHEMISTRY
卷 54, 期 9, 页码 3260-3267出版社
AMER CHEMICAL SOC
DOI: 10.1021/jm101554k
关键词
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资金
- National Institutes of Health [5U01-A1 082211]
Smallpox was globally eradicated 30 years ago by vaccination. The recent threat of bioterrorism demands the development of improved vaccines and novel therapeutics to effectively preclude a reemergence of smallpox. One new therapeutic target is the vaccinia poxvirus processivity complex, comprising D4 and A20 proteins that enable the viral E9 DNA polymerase to synthesize extended strands. Five compounds identified from an AlphaScreen assay designed to disrupt A20:D4 binding were shown to be effective in: (i) blocking vaccinia processive DNA synthesis in vitro, (ii) preventing cellular infection with minimal cytotoxicity, and (iii) binding to D4, as evidenced by ThermoFluor. The EC50 values for inhibition of viral infectivity ranged from 9.6 to 23 mu M with corresponding selectivity indices (cytotoxicity CC50/viral infectivity EC50) of 3.9 to 17.8. The five compounds are thus potential therapeutics capable of halting smallpox DNA synthesis and infectivity through disruptive action against a component of the vaccinia processivity complex.
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