Cell Res:清华大学谢道昕课题组昆虫媒介病毒研究取得重大突破!

2017-01-11 佚名 生物谷

图片来源:www.sciencedaily.com 最近,来自清华大学和加利福尼亚大学的研究人员通过研究揭开了特殊病毒蛋白的新功能,这种病毒蛋白或能控制宿主机体的气味来吸引更多的节肢动物媒介载体(比如蚊子)。研究者表示,我们发现,黄瓜花叶病毒能够操控植物宿主来释放气味吸引蚜虫,从而通过蚜虫来传播病毒,相关研究刊登于国际杂志Cell Research上。 黄瓜花叶病毒(cucumber

图片来源:www.sciencedaily.com

最近,来自清华大学和加利福尼亚大学的研究人员通过研究揭开了特殊病毒蛋白的新功能,这种病毒蛋白或能控制宿主机体的气味来吸引更多的节肢动物媒介载体(比如蚊子)。研究者表示,我们发现,黄瓜花叶病毒能够操控植物宿主来释放气味吸引蚜虫,从而通过蚜虫来传播病毒,相关研究刊登于国际杂志Cell Research上。

黄瓜花叶病毒(cucumber mosaic virus)能够快速扩散,并且对植物诱发不可逆的损伤,本文研究对于科学家们开发更多耐病植物提供了一定线索。研究者Shou-Wei Ding长期从事于RNA病毒的研究,他经常关注于研究病毒和宿主之间的相互作用机制。植物和人类机体中的多种重要疾病都是由病原体引发的,比如黄瓜花叶病毒和寨卡病毒,而这些病毒的传播也是通过节肢动物来完成的,而病原体的出现和作用往往会受到宿主和节肢动物媒介之间相互作用的影响。

植物中的RNA干扰往往会指导细胞产生抵御黄瓜花叶病毒的原始防御机制,此前研究人员发现,黄瓜花叶病毒中一种名为2b的蛋白质可以阻断植物细胞发起抗病毒的RNA干扰。本文研究中研究者基于此前的研究发现,某些病原体能够控制植物和动物宿主促使其释放特殊气味来吸引蚊子或蚜虫,从而促进病原体通过节肢动物媒介进行传播和扩散。然而研究人员并不清楚这种宿主操控背后存在的分子机制。

研究者指出,蚜虫传播的黄瓜花叶病毒能够利用2b蛋白来抑制植物中特殊的激素信号通路,从而使得蚜虫载体能够被受感染的植物所吸引,这种激素名为茉莉酸。研究者也首次发现,病毒效应蛋白或许能够作为一种吸引昆虫的载体来通过气味使得昆虫摄取植物,特殊的植物激素似乎能够作为主要的宿主因子来介导昆虫载体和受感染植物之间的相互作用。本文研究或为后期科学家们通过靶向作用病毒效应蛋白或吸引病毒载体到感染宿主中的特殊激素开发新型抵御病毒感染的策略提供了新的思路和研究基础。

原始出处:

Wu D, Qi T, Li WX, Tian H, Gao H, Wang J, Ge J, Yao R, Ren C, Wang XB, Liu Y, Kang L, Ding SW, Xie D.Viral effector protein manipulates host hormone signaling to attract insect vectors.Cell Res. 2017 Jan 6. doi: 10.1038/cr.2017.2.

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    2017-01-16 维他命
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    2017-05-20 zhanfl
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    2017-01-13 医生2397