对病毒与宿主蛋白相互作用的比较绘制揭示了登革热和寨卡病毒的发病机制
Priya S Shah1, Nichole Link2, Gwendolyn M Jang3
1Department of Cellular and Molecular Pharmacology, University of California San Francisco, San Francisco, CA, USA; Department of Microbiology and Immunology, University of California San Francisco, San Francisco, CA, USA; Quantitative Biosciences Institute (QBI), University of California San Francisco, San Francisco, CA, USA; The J. David Gladstone Institutes, San Francisco, CA, USA.
Cell
|December 15, 2018
概括
蚊子传播的黄病毒如登革热和寨卡病毒通过蛋白质相互作用劫持细胞. 向SEC61抑制病毒复制,而寨卡蛋白相互作用解释了小头症,提供了新的治疗途径.
科学领域:
- 病毒学
- 分子生物学
- 遗传学
背景情况:
- 蚊子传播的黄病毒,如登革热病毒 (DENV) 和寨卡病毒 (ZIKV),对全球健康构成重大风险.
- 了解病毒-宿主蛋白-蛋白相互作用 (PPI) 对于阐明弗拉维病毒复制和致病性至关重要.
研究的目的:
- 在人类和蚊子细胞中对DENV和ZIKV的flavivirus宿主PPI进行比较映射.
- 确定保存和病毒特异性相互作用以获得机制性见解.
- 研究确定的相互作用在病毒复制和发病过程中的作用,包括小头症.
主要方法:
- 使用亲和净化质谱法 (AP-MS) 来识别DENV和ZIKV宿主PPI.
- 用SEC61的化学调节来评估其对病毒复制的影响.
- 使用Drosophila模型研究与ANKLE2相关的ZIKV NS4A诱导的小头症.
主要成果:
- 通过抑制PAF1C转录复合体,保存的PPI显示了flavivirus NS5蛋白抑制干扰素刺激的基因.
- 化学抑制SEC61有效地减少了人类和蚊子细胞中的DENV和ZIKV复制.
- 确定了NS4A和ANKLE2之间的ZIKV特异性相互作用,并且ZIKV NS4A被证明会在依赖ANKLE2的Drosophila中引起小头症.
结论:
- 对PPI进行比较的绘制为弗拉维病毒机制提供了有价值的生物学见解.
- 针对保存的相互作用,如涉及NS5和PAF1C,或像SEC61这样的宿主因素,呈现出潜在的治疗策略.
- 在体内模型中验证的ZIKV NS4A-ANKLE2相互作用提供了将寨卡病毒感染与小头症联系起来的特定机制.
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