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HIV-1 fusion inhibitors targeting the membrane-proximal external region of Env spikes.
Nature Chemical Biology ( IF 12.9 ) Pub Date : 2020-03-09 , DOI: 10.1038/s41589-020-0496-y
Tianshu Xiao 1 , Gary Frey 1, 2 , Qingshan Fu 3 , Christy L Lavine 4 , David A Scott 5 , Michael S Seaman 4 , James J Chou 3 , Bing Chen 1
Affiliation  

Combination antiretroviral therapy has transformed HIV-1 infection, once a fatal illness, into a manageable chronic condition. Drug resistance, severe side effects and treatment noncompliance bring challenges to combination antiretroviral therapy implementation in clinical settings and indicate the need for additional molecular targets. Here, we have identified several small-molecule fusion inhibitors, guided by a neutralizing antibody, against an extensively studied vaccine target-the membrane proximal external region (MPER) of the HIV-1 envelope spike. These compounds specifically inhibit the HIV-1 envelope-mediated membrane fusion by blocking CD4-induced conformational changes. An NMR structure of one compound complexed with a trimeric MPER construct reveals that the compound partially inserts into a hydrophobic pocket formed exclusively by the MPER residues, thereby stabilizing its prefusion conformation. These results suggest that the MPER is a potential therapeutic target for developing fusion inhibitors and that strategies employing an antibody-guided search for novel therapeutics may be applied to other human diseases.

中文翻译:

HIV-1 融合抑制剂靶向 Env 尖峰的近膜外部区域。

联合抗逆转录病毒疗法已将 HIV-1 感染从曾经致命的疾病转变为可控制的慢性病。耐药性、严重的副作用和治疗不依从性给临床环境中联合抗逆转录病毒疗法的实施带来了挑战,并表明需要额外的分子靶点。在这里,我们已经确定了几种小分子融合抑制剂,由中和抗体引导,针对广泛研究的疫苗靶点 - HIV-1 包膜尖峰的膜近端外部区域 (MPER)。这些化合物通过阻断 CD4 诱导的构象变化来特异性抑制 HIV-1 包膜介导的膜融合。与三聚体 MPER 构建体复合的一种化合物的 NMR 结构表明,该化合物部分插入到仅由 MPER 残基形成的疏水口袋中,从而稳定其融合前构象。这些结果表明 MPER 是开发融合抑制剂的潜在治疗靶点,并且采用抗体引导寻找新疗法的策略可能适用于其他人类疾病。
更新日期:2020-04-24
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