Inhibiting HTLV-1 Protease: A Viable Antiviral Target.

Inhibiting HTLV-1 Protease: A Viable Antiviral Target.
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DOI:
10.1021/acschembio.0c00975
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发表时间:
2021-03-19
影响因子:
4
通讯作者:
Schiffer CA
Schiffer CA
中科院分区:
生物学2区
文献类型:
--
作者:
Lockbaum GJ;Henes M;Talledge N;Rusere LN;Kosovrasti K;Nalivaika EA;Somasundaran M;Ali A;Mansky LM;Kurt Yilmaz N;Schiffer CA

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人类嗜T淋巴细胞病毒1型(HTLV-1)是一种逆转录病毒,可引起严重的麻痹性神经系统疾病和免疫紊乱以及癌症。据估计,全世界有2000万人感染了HTLV-1,在世界某些地区的患病率达到30%。与HIV-1形成鲜明对比的是,没有针对HTLV-1的直接作用的抗病毒药物(DAA)。HTLV-1的乙酰基蛋白酶是与HIV-1类似的二聚体,并加工病毒多蛋白以允许病毒成熟。我们报告说,FDA批准的HIV-1蛋白酶抑制剂达芦那韦(DRV)以0.8 μM的效力抑制该酶,并为针对HTLV-1的药物设计提供了一个支架。我们设计和合成的DRV类似物实现了对HTLV-1蛋白酶的亚微摩尔抑制,并在病毒成熟测定和慢性HTLV-1感染细胞系中抑制Gag加工。这些抑制剂与HTLV-1蛋白酶的共晶结构突出了未来抑制剂设计的机会。我们的研究结果表明,开发高效的HTLV-1蛋白酶抑制剂作为治疗剂对HTLV-1感染的承诺。
Human T-cell lymphotropic virus type 1 (HTLV-1) is a retrovirus that can cause severe paralytic neurologic disease and immune disorders as well as cancer. An estimated 20 million people worldwide are infected with HTLV-1, with prevalence reaching 30% in some parts of the world. In stark contrast to HIV-1, no direct acting antivirals (DAAs) exist against HTLV-1. The aspartyl protease of HTLV-1 is a dimer similar to that of HIV-1 and processes the viral polyprotein to permit viral maturation. We report that the FDA-approved HIV-1 protease inhibitor darunavir (DRV) inhibits the enzyme with 0.8 µM potency and provides a scaffold for drug design against HTLV-1. Analogs of DRV that we designed and synthesized achieved sub-micromolar inhibition against HTLV-1 protease and inhibited Gag processing in viral maturation assays and in a chronically HTLV-1 infected cell line. Cocrystal structures of these inhibitors with HTLV-1 protease highlight opportunities for future inhibitor design. Our results show promise toward developing highly potent HTLV-1 protease inhibitors as therapeutic agents against HTLV-1 infections.
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