3-Hydroxypyrimidine-2,4-diones as Selective Active Site Inhibitors of HIV Reverse Transcriptase-Associated RNase H: Design, Synthesis, and Biochemical Evaluations
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- 作者：Jing Tang ; Feng Liu ; Eva Nagy ; Lena Miller ; Karen A. Kirby ; Daniel J. Wilson ; Bulan Wu ; Stefan G. Sarafianos ; Michael A. Parniak ; Zhengqiang Wang
- 刊名：Journal of Medicinal Chemistry
- 出版年：2016
- 出版时间：March 24, 2016
- 年：2016
- 卷：59
- 期：6
- 页码：2648-2659
- 全文大小：538K
- ISSN：1520-4804
文摘
Human immunodeficiency virus (HIV) reverse transcriptase (RT) associated ribonuclease H (RNase H) remains an unvalidated antiviral target. A major challenge of specifically targeting HIV RNase H arises from the general lack of selectivity over RT polymerase (pol) and integrase (IN) strand transfer (ST) inhibitions. We report herein the synthesis and biochemical evaluations of three novel 3-hydroxypyrimidine-2,4-dione (HPD) subtypes carefully designed to achieve selective RNase H inhibition. Biochemical studies showed the two subtypes with an N-1 methyl group (9 and 10) inhibited RNase H in low micromolar range without siginificantly inhibiting RT polymerase, whereas the N-1 unsubstituted subtype 11 inhibited RNase H in submicromolar range and RT polymerase in low micromolar range. Subtype 11 also exhibited substantially reduced inhibition in the HIV-1 INST assay and no significant cytotoxicity in the cell viability assay, suggesting that it may be amenable to further structure–activity relationship (SAR) for identifying RNase H inhibitors with antiviral activity.