AG129小鼠——登革热病毒研究的好帮手
登革热病毒
干扰素(IFN)是一类具有多重生物学功能的细胞因子,主要分为I型、II型和III型[1]。I型和II型干扰素受体敲除小鼠(Ifnar1& Ifngr1 dKO mice,简称AG129)在研究抗病毒免疫反应和干扰素信号传导方面具有重要价值。AG129小鼠可被用于DENV的感染机制和疫苗效果。由于这些小鼠缺乏干扰素-α/β和-γ受体,它们对DENV高度敏感。研究表明老年AG129小鼠对DENV1-4血清亚型高度敏感,并且在适应后,会产生神经毒性菌株,这些菌株表现出复制增强、疾病严重程度加重、神经发病机制增加以及高致死率[2]。AG129小鼠可表现出人类 DENV 感染的关键特征,包括在脾脏中复制、明显的病毒血症、血管渗漏和血小板减少等严重疾病[3-5]。这使得它们成为评估登革热疫苗和抗病毒药物效果的重要模型。
参考文献
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