NATURE:艾滋病候选长效药物I期临床:注射一次可维持半年

2020-07-02 MedSci原创 MedSci原创

在1期临床研究中,单次皮下剂量的GS-6207(450mg)单药治疗,9天后血浆病毒载量平均转化降低lg2.2倍,此外,其在抗病毒活性浓度下血浆暴露持续超过6个月。

口服抗逆转录病毒药物为数以百万计的艾滋病毒感染者提供了可以拯救生命的治疗,并可通过接触前的给药预防新的感染。然而,由于多药耐药性,一些有长期治疗经历的艾滋病毒感染者的治疗选择有限或没有选择。此外,对每日口服治疗方案的临床依从性差会对治疗结果产生负面影响--这会导致病毒学失败、耐药性的产生和病毒传播--以及接触前预防的失败,导致新的感染。

因此,我们需要新的抗逆转录病毒类药物长效制剂,为有长期治疗经历的HIV感染者提供急需的治疗选择,另外还可以提高患者依从性。

在这里,研究人员描述了一种名为GS-6207的小分子,其可以破坏HIV 衣壳蛋白的功能,并由于其高效力,低体内系统清除率和皮下注射部位的缓慢释放动力学,适合长效治疗。

借鉴X射线晶体学信息,研究人员设计了GS-6207,使其在衣壳蛋白单体之间的保守界面上紧密结合,干扰衣壳蛋白介导的蛋白质之间的相互作用,而这些蛋白质对病毒复制周期的多个阶段是必不可少的。

GS-6207在皮摩尔浓度下对所测试的所有HIV-1亚型都具有抗病毒活性,并且与已批准的抗逆转录病毒药物具有高度的协同作用和无交叉耐药性。

在1期临床研究中,单次皮下剂量的GS-6207(450mg)单药治疗,9天后血浆病毒载量平均转化降低lg2.2倍,此外,其在抗病毒活性浓度下血浆暴露持续超过6个月。

这些结果为针对HIV衣壳蛋白功能的疗法提供了临床验证,并证明GS-6207作为长效药物治疗或预防HIV感染的潜力。

 

原始出处:

John O. Link et al. Clinical targeting of HIV capsid protein with a long-acting small molecule, NATURE (2020). 

 

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    2020-07-04 liye789132251
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