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Paraformaldehyde

Company: EMD Millipore
Catalog#: 104005
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Isolation and Cultivation of Primary Brain Endothelial Cells from Adult Mice
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Date:
2017-05-20
[Abstract]  Brain endothelial cells are the major building block of the blood-brain barrier. To study the role of brain endothelial cells in vitro, the isolation of primary cells is of critical value. Here, we describe a protocol in which vessel fragments are isolated from adult mice. After density centrifugation and mild digestion of the fragments, outgrowing endothelial cells are selected by puromycin treatment and grown to confluence within one week. [摘要]  脑内皮细胞是血脑屏障的主要组成部分。 为了研究脑内皮细胞在体外的作用,原代细胞的分离是临床价值。 在这里,我们描述了一种方案,其中血管片段与成年小鼠分离。 在密度离心和片段的温和消化后,通过嘌呤霉素处理选择出生长的内皮细胞,并在一周内生长至汇合。
【背景】血脑屏障保护大脑免受细胞和物质的不受控制的侵入。 这主要是由脑内皮细胞形成的屏障组成的紧密和粘附连接限制细胞旁运输。
该方案被开发以克服维持其关键特征的小鼠脑内皮细胞系的有限可用性,例如表达足够量的紧密连接蛋白如闭合蛋白,ZO-1或紧密连接蛋白-5以诱导高跨内皮细胞抗性。
此外,从内含基因修饰的小鼠中分离脑内皮细胞可以在体外研究基因特异性功能。
使用这种方法,我们以前补充了体内研究,证明NF-κB信号在脑内皮细胞中维持正常血脑屏障功能的重要性(Ridder等,2015)。

RNase Sensitivity Screening for Nuclear Bodies with RNA Scaffolds in Mammalian Cells
Author:
Date:
2017-04-20
[Abstract]  The mammalian cell nucleus is highly organized and contains membraneless nuclear bodies (NBs) characterized by distinct resident factors. The NBs are thought to serve as sites for biogenesis and storage of certain RNA and protein factors as well as assembly of ribonucleoprotein complexes. Some NBs are formed with architectural RNAs (arcRNAs) as their structural scaffolds and additional NBs likely remain unidentified in mammalian cells. Here, we describe an experimental protocol to search for new NBs built on certain arcRNAs. RNase-sensitive NBs were identified by monitoring nuclear foci visualized by tagging thousands of human cDNA products. [摘要]  哺乳动物细胞核高度组织,包含以不同的居民因素为特征的无膜核体(NBs)。 NB被认为是用于某些RNA和蛋白质因子的生物发生和储存的位点以及核糖核蛋白复合物的组装。 一些NB由构建的RNA(arcRNA)形成,作为它们的结构性支架,另外的NB可能在哺乳动物细胞中保持不明。 在这里,我们描述了一个实验协议来搜索建立在某些arcRNA上的新NB。 通过监测通过标记数千个人类cDNA产物可视化的核病灶来鉴定RNase敏感性NB。
【背景】哺乳动物细胞核是高度组织的,由称为核体(NB)的多个不同的亚结构组成。迄今为止,已经将15个NB鉴定为含有各种蛋白质和RNA因子的亚核膜无颗粒结构,其中许多颗粒结构用作特异性RNA,蛋白质和/或核糖核蛋白(RNP)复合物的生物发生,成熟,储存和螯合的位点Mao et al。,2011; Sleeman and Trinkle-Mulcahy,2014)(表1)。
一些NB被构建在称为结构RNA(arcRNA)的特定长非编码RNA(lncRNA)上,其定义为NB的结构核心(Chujo等,2016)。 arcRNA依赖的NB由与arcRNA相互作用的许多RNA结合蛋白组成。最显着的例子是由几种特征性RNA结合蛋白组成的寄生虫斑(Fox等,2002; ...

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