Structure:美国科学家揭示HCV病毒耐药的新机制

2018-10-17 Etrgh 病毒学界

据统计,在全球大概有7500万的人群感染丙型肝炎病毒(HCV)。而且,超过80%的人群因为感染了HCV而发展为慢性肝疾病,并不断恶化导致肝硬化及肝癌。

据统计,在全球大概有7500万的人群感染丙型肝炎病毒(HCV)。而且,超过80%的人群因为感染了HCV而发展为慢性肝疾病,并不断恶化导致肝硬化及肝癌。尽管目前已经开发了多种能够通过抑制HCV蛋白酶(PI)有效治疗的HCV感染的药物,但由于HCV病毒为RNA病毒,容易发生突变而产生耐药性且其耐药机制尚未完全弄清楚。近日,来自美国的科学家们在《Cell》杂志上发表了一篇题为“Molecular Mechanism of Resistance in a Clinically SignificantDouble-Mutant Variant of HCV NS3/4A Protease”的文章。

该文章通过使用抑制试验、共结晶结构分析及分子动力学模拟试验的方法深度揭示了目前临床上用于治疗HCV感染的酶抑制剂药物如依巴司韦(grazoprevir)、帕利瑞韦(paritaprevir)和丹诺普韦(Danoprevir)无法有效抑制病毒增殖的分子机制。



研究成果证实,HCV出现Y56H/D168A双重替代突变是导致病毒耐药的重要原因。该研究成果在进一步揭示临床上HCV抑制剂失效的原因的同时,也为临床抗HCV新药的开发提供了新的研究方向。

原始出处:Matthew AN1, Leidner F1, Newton A2, et al. Molecular Mechanism of Resistance in a Clinically Significant Double-Mutant Variant of HCV NS3/4A Protease. Structure. 2018 Oct 2;26(10):1360-1372.e5. 

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    2019-07-08 日月
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    2018-10-19 kafei

    学习了谢谢

    0

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    2018-10-18 ymljack

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