化学遗传学策略确定了一种具有强大的临床效果的HCV NS5A抑制剂
Min Gao1, Richard E Nettles, Makonen Belema
1Department of Virology, Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, Connecticut 06492, USA.
Nature
|April 23, 2010
概括
一种名为BMS-790052的新药通过向NS5A蛋白来有效抑制C型肝炎病毒 (HCV) 复制. 这种直接作用的抗病毒药物在治疗慢性HCV感染方面表现有前途,提供了潜在的新疗法选择.
科学领域:
- 肝病学 肝病学是一种肝病学.
- 病毒学 病毒学
- 药理学 药理学是指药理学的学科.
背景情况:
- 慢性型肝炎病毒 (HCV) 感染影响全球近2亿人.
- 目前的治疗方法 (pegylated interferon-alpha和ribavirin) 的疗效有限 (持续病毒学反应<50%) 和耐受性差,特别是对1型病毒.
- 针对NS3蛋白酶或NS5B聚合酶的直接作用抗病毒药物正在开发中.
研究的目的:
- 描述BMS-790052,一种新的HCV NS5A蛋白小分子抑制剂.
- 在I期临床试验中评估BMS-790052的体外抗病毒活性和体内疗效.
主要方法:
- 在细胞培养中评估了BMS-790052对各种HCV基因型和JFH-1病毒的半最大有效度 (EC50).
- 在I期临床试验中,给患有慢性HCV感染的患者服用一次100mg的BMS-790052剂量.
- 在剂量后的多个时间点进行病毒载量测量和基因型分析.
主要成果:
- 在实验室中,BMS-790052对广泛的HCV基因型进行了皮科莫尔EC50值的检测.
- 一次100毫克的剂量导致1b基因型感染患者在24小时内平均3.3log(10) 减少病毒载量.
- 在一些患者中,病毒载量减少持续超过120小时.
- 基因型分析揭示了主要HCV变异在体外鉴定的位置上的替代.
结论:
- BMS-790052是首个临床验证的HCV NS5A蛋白的抑制剂.
- 抑制NS5A,一种非酶蛋白,是抑制HCV复制的可行策略.
- BMS-790052显示出作为慢性HCV感染组合疗法的组成部分的潜力.
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