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Oxoid Skim Milk Powder

Company: Thermo Fisher Scientific
Catalog#: LP0031B
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Rice Ragged Stunt Virus Propagation and Infection on Rice Plants
Author:
Date:
2018-10-20
[Abstract]  Virus inoculation is a basic experimental procedure to evaluate the resistance of a rice variety or a transgenic material upon virus infection. We recently demonstrated that Rice Ragged Stunt Virus (RRSV), an oryzavirus that is transmitted by brown planthopper (BPH), can suppress jasmonic acid-mediated antiviral defense through the induction of microRNA319 and facilitate virus infection in rice. To verify this, we performed virus inoculation experiments on wild-type rice plants and miR319-TCP21-associated transgenic rice plants through a modified group inoculation method. Here, we presented the detailed procedure of RRSV propagation and infection process on rice plants. [摘要]  病毒接种是评估水稻品种或转基因材料对病毒感染的抗性的基本实验程序。 我们最近证明,由褐飞虱(BPH)传播的 Rice Ragged Stunt Virus >(RRSV)是一种 oryzavirus >,可以通过诱导抑制茉莉酸介导的抗病毒防御 microRNA319并促进水稻中的病毒感染。 为了验证这一点,我们通过改良的组接种方法对野生型水稻植物和miR319-TCP21相关的转基因水稻植物进行了病毒接种实验。 在这里,我们介绍了水稻植物RRSV繁殖和感染过程的详细程序。
【背景】研究病毒发病机制和筛选抗病毒水稻品种已经在克服水稻病毒病和保持粮食安全方面做了大量工作。 在该领域中,病毒接种是评估转基因材料或水稻品种的抗性的必要且可靠的方法。 水稻粗糙特技病毒>(RRSV)可以在许多亚洲国家以持续繁殖的方式通过褐飞虱传播水稻褴褛特技病(Ling et al。>,1978; Hibino,1979)。 两种经典方法,包括单苗接种和组接种,已用于进行病毒接种实验(Zhang et al。>,2013)。 通过修改传统的群体接种方法,我们提供了一种与自然感染条件非常相似的便捷方法。

Deoxycholate Fractionation of Fibronectin (FN) and Biotinylation Assay to Measure Recycled FN Fibrils in Epithelial Cells
Author:
Date:
2018-08-20
[Abstract]  Fibronectin (FN) is an extracellular matrix protein that is secreted by many cell types and binds predominantly to the cell surface receptor Integrin α5β1. Integrin α5β1 binding initiates the step-wise assembly of FN into fibrils, a process called fibrillogenesis. We and several others have demonstrated critical effects of fibrillogenesis on cell migration and metastasis. While immunostaining and microscopy methods help visualize FN incorporation into fibrils, with each fibril being at least 3 μm in length, the first study that developed a method to biochemically fractionate FN to quantify fibril incorporated FN was published by Jean Schwarzbauer’s group in 1996. Our protocol was adapted from the original publication, and has been tested on multiple cell types including as shown here in ... [摘要]  纤连蛋白(FN)是一种细胞外基质蛋白,由许多细胞类型分泌,主要与细胞表面受体整合素α5β1结合。整合素α5β1结合启动FN逐步组装成原纤维,这一过程称为原纤维形成。我们和其他几个人已经证明了原纤维形成对细胞迁移和转移的关键作用。虽然免疫染色和显微镜方法有助于可视化FN掺入原纤维,每个原纤维的长度至少为3μm,但是第一项研究开发了一种生物化学分离FN以量化原纤维并入FN的方法,由Jean Schwarzbauer小组于1996年出版。我们的方案改编自原始出版物,并已在多种细胞类型上进行测试,包括如此处所示的MCF10A乳腺上皮细胞和Caki-1肾癌上皮细胞。使用两种洗涤剂提取物,将细胞FN分离成不溶于洗涤剂或掺入原纤维的FN和可溶性FN或未掺入的级分。为了确定原纤维形成是否利用FN的再循环池,我们使用了生物素标记的FN(FN-生物素)再循环测定,其已经从先前的研究中修改。使用再循环测定和脱氧胆酸盐分离方法的组合,可以定量地证明在不同实验条件下细胞中原纤维形成的程度,并确定原纤维形成的FN来源

【背景】 纤连蛋白(FN)是普遍产生的细胞外基质(ECM)组分(Uitto et al。,1989; Mao和Schwarzbauer,2005)。纤连蛋白库是转录产生的,可以通过几种生长因子如TGF-β1增加(Yokoi et al。,2002; Mimura ...

Isolation of Rice Stripe Virus Preparation from Viruliferous Small Brown Planthoppers and Mechanic Inoculation on Rice
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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