干扰素诱导的蛋白质IFIT2需要RNA结合活性和神经元表达,以保护小鼠免受鼻内囊泡性口腔炎病毒感染
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Rescue of Recombinant Newcastle Disease Virus from cDNA
Published on: October 11, 2013
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Darshana Poddar1, Nikhil Sharma1, Tomoaki Ogino2
1Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA.
mBio
|June 18, 2024
概括
干扰素诱导的蛋白质IFIT2对于保护大脑免受RNA病毒感染至关重要. 它的RNA结合能力对于这种抗病毒防御至关重要,特别是在神经元细胞中.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 神经科学是一个神经科学.
背景情况:
- 干扰素 (IFN) 系统是对哺乳动物病毒感染的关键防御.
- 由IFN刺激的基因编码介导抗病毒效应的蛋白质.
- IFIT2 (干扰素诱导的四基重复蛋白2) 是一种RNA结合蛋白,已知可以防止神经向RNA病毒.
研究的目的:
- 研究IFIT2在神经细胞中对病毒神经病变发生的作用.
- 为了确定IFIT2的RNA结合活性是否对其体内抗病毒功能至关重要.
主要方法:
- 生成一个有条件的淘汰赛小鼠模型,以消灭Ifit2表达,特别是在神经元细胞.
- 产生一种表达突变IFIT2蛋白不能结合RNA的小鼠模型.
- 这些小鼠模型通过鼻内和皮下途径感染囊泡性口腔炎病毒 (VSV).
主要成果:
- 在神经元细胞中Ifit2的消去使得小鼠在鼻内VSV感染后容易发生神经病变.
- 表达非RNA结合突变IFIT2的小鼠与Ifit2淘汰的小鼠一样容易感染VSV.
- 在鼻内和皮下感染途径之间观察到敏感性差异.
结论:
- IFIT2的RNA结合活性对于防止由鼻内VSV感染引起的神经疾病至关重要.
- 神经Ifit2诱导是干扰素抗病毒功能的必要条件.
- IFIT2通过其RNA结合能力而不是酶活性,作为抗病毒蛋白质起作用.
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