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在转基因K18-hACE2小鼠中,Omicron亚变体感染动力学和涅马特利维尔的有效性

Vijeta Sharma¹, Enriko Dolgov¹, Taylor Tillery¹

¹Center for Discovery and Innovation, Hackensack Meridian Health, 111 Ideation Way, Nutley, NJ 07110, USA.

International journal of molecular sciences

|October 16, 2025

概括

新的SARS-CoV-2 Omicron亚型如JN.1显示出快速的感染动力学和独特的免疫反应. 直接作用的抗病毒药物尼马特里尔维尔仍然有效,在对抗这些不断演变的变体的小鼠中显示出显著的病毒载量减少.

科学领域:

病毒学病毒学
免疫学免疫学免疫学
药理学药理学是指药理学的学科.

背景情况:

SARS-CoV-2 持续演变,导致Omicron亚型 (例如,JN.1,KP.3.1.1,LB.1) 具有增强的传染性和免疫逃避.
当前疫苗和单克隆抗体的有效性降低,需要探索直接作用抗病毒药物等替代疗法.

研究的目的:

调查最近的Omicron亚变体的复制动力学,免疫反应和治疗敏感性.
评估尼尔马特里尔维尔对这些新出现的SARS-CoV-2变种的疗效.

主要方法:

利用K18-hACE2转基因小鼠模型研究了三个Omicron亚型 (JN.1,KP.3.1.1,LB.1) 和WA1/2020父菌株.
监测病毒复制动力学,肺细胞因子/化学因子概况,以及对Nirmatrelvir的治疗反应.

主要成果:

与WA1/2020相比,Omicron亚型体表现出肺病毒标位的早期峰值 (感染后2天) 和加速的肺免疫反应.
涅玛特雷尔维尔治疗显著降低了子变异感染小鼠的肺病毒标位,显示出比对母菌株更大的疗效.

结论:

感染最近的Omicron亚型导致可预测的病毒载荷动态和强大的免疫激活.
尼尔马特里尔维尔对新出现的SARS-CoV-2 Omicron亚变体保持了显著的治疗疗效,这突显了它对抗病毒演变的重要性.

关键词:

尼尔马特里尔维尔 (Nirmatrelvir) 是一种欧米克朗子变体的子变体这就是SARS-CoV-2病毒.动物模型动物模型抗病毒药物是一种抗病毒药物.肺部免疫反应的免疫反应

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