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Deoxynucleotides (dNTPs)

dNTP集

Company: Thermo Fisher Scientific
Catalog#: 10297117
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In situ Hybridization (ISH) in Preparasitic and Parasitic Stages of the Plant-parasitic Nematode Meloidogyne spp.
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Date:
2018-03-20
[Abstract]  The spatio-temporal expression pattern of a gene provides important indications to better understand its biological function. In situ hybridization (ISH) uses a labeled complementary single-stranded RNA or DNA probe to localize gene transcripts in a whole organism, a whole organ or a section of tissue. We adapted the ISH technique to the plant parasite Meloidogyne spp. (root-knot nematode) to visualize RNAs both in free-living preparasitic juveniles and in parasitic stages settled in the plant tissues. We describe each step of the probe synthesis, digoxigenin (DIG) labeling, nematode extraction from plant tissue, and ISH procedure. [摘要]  基因的时空表达模式为更好地理解其生物学功能提供了重要的指示。 原位杂交(ISH)使用标记的互补单链RNA或DNA探针来定位整个生物体,整个器官或一部分组织中的基因转录物。 我们将ISH技术应用于植物寄生虫

【背景】到目前为止,植物寄生性线虫的稳定转化尚未成功。 ISH能够在整个装载的Meloidogyne spp中分析体内时空基因表达。线虫。这些根结线虫在土壤中以微小蚓状幼虫(J2)形式孵化并感染宿主植物根部。 J2s穿透根部并迁移到根部维管柱状细胞。幼虫定居在根部,发育成J3和J4寄生幼鱼,诱导分化专化饲养细胞。线虫最终发育成梨形雌性,将在根表面释放数百个卵。在这里,我们报告了一个详细的协议来检测准备性整体安装J2s和寄生阶段中的单个RNA分子。寄生虫阶段的ISH需要在感染根部提取线虫前一天采取额外的程序。我们描述了在线虫整个组织中使用地高辛(DIG)标记的cDNA探针检测转录物。

Preparation of Respiratory Syncytial Virus with High or Low Content of Defective Viral Particles and Their Purification from Viral Stocks
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Date:
2016-05-20
[Abstract]  Respiratory syncytial virus (RSV) belongs to the paramyxovirus family that includes many clinically relevant viruses, such as the human metapneumovirus and measles. RSV infection can cause severe disease in infants, the elderly, and some immunocompromised adults. During RSV replication, a series of truncated forms of the viral genome is generated. These truncated viral genomes are known as defective viral genomes (DVGs) and are generated by many viruses (Lazzarini et al., 1981; Rao and Huang, 1982; Prince et al., 1996; Sun et al., 2015; Tapia et al., 2013). DVGs can restrict the replication of the full-length virus and are the primary natural triggers of the innate immune response to RSV (Sun et al., 2015; Tapia et al., 2013). ... [摘要]  呼吸道合胞病毒(RSV)属于包括许多临床相关病毒(例如人偏肺病毒和麻疹)的副粘病毒家族。 RSV感染可以在婴儿,老年人和一些免疫受损的成人中引起严重的疾病。在RSV复制期间,产生一系列截短形式的病毒基因组。这些截短的病毒基因组被称为缺陷型病毒基因组(DVG),并且由许多病毒产生(Lazzarini等人,1981; Rao和Huang,1982; Prince等人, ,1996; Sun等人,2015; Tapia等人,2013)。 DVG可以限制全长病毒的复制,并且是针对RSV的先天免疫应答的主要天然触发因子(Sun等人,2015; Tapia等人 ,2013)。在这里,我们详细讨论如何准备具有高或低含量的DVG的RSV股票,以及如何从富含缺陷病毒颗粒的RSV原液中纯化含有DVG的缺陷病毒颗粒。这些程序可用于制备实验室研究所需的病毒原液和有缺陷的病毒颗粒。简言之,在HEp2细胞中产生不同的RSV种群,其通常用于在实验室中扩增该病毒。为了产生具有高含量DVG的RSV原液,HEp2细胞用高多重感染(MOI)多次感染,然后使用梯度离心纯化含有DVG的病毒颗粒。这里描述的方法具有四个部分:1.具有低DVG含量(RSV-LD)的种子RSV原种的扩增,2.具有高DVG含量(RSV-HD)的原种的产生,3.通过梯度离心,4.纯化DVG的表征。

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