| Isolation of Rice Stripe Virus Preparation from Viruliferous Small Brown Planthoppers and Mechanic Inoculation on Rice
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Author:
Date:
2017-11-05
[Abstract] Tenuiviruses can infect the plants of the family Poaceae, and cause serious loss of crops, particularly rice and maize, in South-Eastern Asian countries. Tenuiviruses usually depend on insect vectors for their transmission and cannot be transmitted between plants through wounds or abrasions. Rice stripe virus (RSV), a typical member of tenuiviruses, is efficiently transmitted by the small brown planthopper Laodelphax striatellus in a persistent-propagative manner to cause rice stripe disease. Here we presented a convenient method, the midrib micro-injection, to mechanically inoculate insect-derived RSV into rice leaves for conducting pathogenicity assay on rice plants.
[摘要] 细菌病毒可以感染禾本科植物，并在东南亚国家造成严重的作物损失，特别是稻米和玉米。 病毒通常依靠昆虫载体传播，不能通过伤口或擦伤传播。 水稻条纹病毒（RSV）是典型的tenuiviruses的成员，以持续繁殖的方式被小型褐飞虱灰飞虱高效率地传播，导致水稻条纹病。 在这里，我们提出了一种方便的方法，即中微量注射，以机械方式将昆虫来源的RSV接种到水稻叶中，以对水稻植物进行致病性测定。
【背景】除非通过根据不同的实验细节从1％至90％的完全不同的传输速率进行血管穿刺接种（Louie，1995; Hogenhout等人，2008），否则不能将机器接种到植物中。至于RSV，机械传播通常失败或产生低感染率（Ling，1972）。特别地，从病变植物注射RSV粗提物后，传播率仅为6％（Okuyama and Asuyama，1959）。在这项工作中提到的中微注射方法将RSV传播率提高到17％。虽然机械传播RSV的发生率仍远低于昆虫载体传播（53％），但是我们的方法为持续繁殖的植物病毒的机械接种提供了便利的方法。此外，基于这种方法，可以在受感染的植物宿主中更精确地确定持续增殖植物病毒的复制和基因表达，而不受昆虫即接种剂量和昆虫蛋白质的干扰。
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| Virus Infection and Titration of SARS-CoV in Mouse Lung
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Author:
Date:
2014-03-20
[Abstract] Two critical steps when investigating an animal model of a virus infection are consistently successfully infecting animals and accurately determining viral titers in tissue throughout the course of infection. Here we discuss in detail how to infect mice with SARS-CoV and then quantify the titer of virus in the lung.
[摘要] 当研究病毒感染的动物模型时的两个关键步骤一致地成功感染动物并在整个感染过程中精确测定组织中的病毒滴度。 在这里我们详细讨论如何感染小鼠与SARS-CoV，然后量化病毒在肺中的效价。
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| Cell Surface Protein Biotinylation and Analysis
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Author:
Date:
2013-08-20
[Abstract] A great way to specifically isolate and quantify proteins in the cell surface membrane is to take advantage of the biotinylation technique. It consists of labeling cell surface proteins with a biotin reagent before lysing the cells, and isolating these tagged proteins by NeutrAvidin pull-down. Then, the samples are subjected to SDS-PAGE separation, transferred to PVDF membranes and probed with specific antibodies. Quantification of cell surface expression is accomplished by densitometric measurement of the bands corresponding to the protein of interest and subsequent normalization by a membrane protein (as control).
[摘要] 特异性分离和定量细胞表面膜中的蛋白质的好方法是利用生物素化技术。 它包括在裂解细胞之前用生物素试剂标记细胞表面蛋白，并通过NeutrAvidin下拉分离这些标记的蛋白。 然后，将样品进行SDS-PAGE分离，转移至PVDF膜并用特异性抗体探测。 细胞表面表达的定量通过密度测量对应于感兴趣的蛋白质的条带并随后通过膜蛋白质（作为对照）标准化来完成。
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