Effects of NS2B-NS3 protease and furin inhibition on West Nile and Dengue virus replication.

Effects of NS2B-NS3 protease and furin inhibition on West Nile and Dengue virus replication.
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DOI:
10.1080/14756366.2017.1306521
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发表时间:
2017-12
影响因子:
5.6
通讯作者:
Steinmetzer T
Steinmetzer T
中科院分区:
医学2区
文献类型:
--
作者:
Kouretova J;Hammamy MZ;Epp A;Hardes K;Kallis S;Zhang L;Hilgenfeld R;Bartenschlager R;Steinmetzer T

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西尼罗河病毒(WNV)和登革热病毒(DENV)的复制依赖于病毒NS2B-NS3蛋白酶和宿主酶弗林蛋白酶,它们成为潜在的药物靶标。用碱性苯丙氨酸类似物对我们之前描述的 WNV 蛋白酶抑制剂进行修饰,提供了对抗 WNV 和 DENV 蛋白酶效力降低的化合物。在第二个系列中,他们的脱羧P1-反式-(4-胍基)环己酰胺被精氨酰酰胺部分取代。化合物 4-(胍基甲基)-苯乙酰基-Lys-Lys-Arg-NH2 抑制 WNV 的 NS2B-NS3 蛋白酶,抑制常数为 0.11 µM。由于底物特异性的相似性,我们还测试了之前描述的多元弗林蛋白酶抑制剂的效力。它们的进一步修饰为嵌合抑制剂提供了针对 WNV 和 DENV 蛋白酶的额外效力。观察到特定弗林蛋白酶抑制剂对细胞培养物中 WNV 和 DENV 复制的强烈抑制作用,使病毒滴度降低高达 10,000 倍。这些研究表明,有效的弗林蛋白酶抑制剂可以阻止 DENV 和 WNV 的复制。
West Nile virus (WNV) and Dengue virus (DENV) replication depends on the viral NS2B-NS3 protease and the host enzyme furin, which emerged as potential drug targets. Modification of our previously described WNV protease inhibitors by basic phenylalanine analogs provided compounds with reduced potency against the WNV and DENV protease. In a second series, their decarboxylated P1-trans-(4-guanidino)cyclohexylamide was replaced by an arginyl-amide moiety. Compound 4-(guanidinomethyl)-phenylacetyl-Lys-Lys-Arg-NH2 inhibits the NS2B-NS3 protease of WNV with an inhibition constant of 0.11 µM. Due to the similarity in substrate specificity, we have also tested the potency of our previously described multibasic furin inhibitors. Their further modification provided chimeric inhibitors with additional potency against the WNV and DENV proteases. A strong inhibition of WNV and DENV replication in cell culture was observed for the specific furin inhibitors, which reduced virus titers up to 10,000-fold. These studies reveal that potent inhibitors of furin can block the replication of DENV and WNV.
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