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24-well plate

Nunc TM细胞培养处理的多层

公司名称: Thermo Fisher Scientific
产品编号: 142475
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Uptake Assays in Xenopus laevis Oocytes Using Liquid Chromatography-mass Spectrometry to Detect Transport Activity
Author:
Date:
2017-10-20
[Abstract]  Xenopus laevis oocytes are a widely used model system for characterization of heterologously expressed secondary active transporters. Historically, researchers have relied on detecting transport activity by measuring accumulation of radiolabeled substrates by scintillation counting or of fluorescently labelled substrates by spectrofluorometric quantification. These techniques are, however, limited to substrates that are available as radiolabeled isotopes or to when the substrate is fluorescent. This prompted us to develop a transport assay where we could in principle detect transport ... [摘要]  非洲爪蟾卵母细胞是用于表征异源表达的第二活性转运蛋白的广泛使用的模型系统。历史上,研究人员依靠通过闪烁计数或荧光标记的底物通过分光荧光定量测量放射性标记底物的积累来检测运输活动。然而,这些技术仅限于可用作放射性标记的同位素的底物或当底物是荧光时。这促使我们开发了一种运输测定法,我们可以原则上检测任何有机代谢物的转运活性,无论其作为放射性标记的同位素或荧光性质如何。

在这个协议中,我们描述了X的使用。卵母细胞作为表达次要活性转运蛋白的异源宿主,以及如何进行摄取测定,然后通过液相色谱 - 质谱(LC-MS)检测和定量运输的代谢物。我们已经成功地使用这种方法来鉴定和表征称为硫代葡萄糖苷和氰基葡糖苷的植物防御代谢物的转运蛋白(Jørgensen等人,2017),然而该方法可用于表征任何转运蛋白底物可以通过LC-MS检测。

【背景】来自非洲爪蟾蛙(Xenopus laevis)的卵母细胞是用于异源表达和表征膜蛋白(即,转运蛋白和通道)的完整表达系统。 X。卵母细胞表达少量内源性膜蛋白,具有低的背景转运活性。此外,来自植物的次要活性转运蛋白(Boorer等人,1992; Theodoulou和Miller,1995; Nour-Eldin等人,2006),动物(Sumikawa 1981); ...

Analysis of Mitochondrial Transfer in Direct Co-cultures of Human Monocyte-derived Macrophages (MDM) and Mesenchymal Stem Cells (MSC)
Author:
Date:
2017-05-05
[Abstract]  Mesenchymal stem/stromal cells (MSC) are adult stem cells which have been shown to improve survival, enhance bacterial clearance and alleviate inflammation in pre-clinical models of acute respiratory distress syndrome (ARDS) and sepsis. These diseases are characterised by uncontrolled inflammation often underpinned by bacterial infection. The mechanisms of MSC immunomodulatory effects are not fully understood yet. We sought to investigate MSC cell contact-dependent communication with alveolar macrophages (AM), professional phagocytes which play an important role in the lung inflammatory ... [摘要]  间充质干/基质细胞(MSC)是成年干细胞,已被证明可以改善急性呼吸窘迫综合征(ARDS)和败血症临床前模型中的存活,增强细菌清除和减轻炎症。这些疾病的特征在于通常受细菌感染支持的不受控制的炎症。 MSC免疫调节作用的机制尚未完全了解。我们试图研究与肺泡巨噬细胞(AM),在肺炎症反应和抗菌防御中起重要作用的专业吞噬细胞的MSC细胞接触依赖性通信。通过使用基本的直接共培养系统,共聚焦显微镜和流式细胞术,我们通过隧道纳米管(TNT)显现并有效量化了MSC线粒体转移到AM。为了模拟人类AM,在粒细胞巨噬细胞集落刺激因子(GM-CSF)存在下,从人供体血液中分离原代单核细胞并分化成巨噬细胞(单核细胞衍生的巨噬细胞,MDM),从而允许适应AM样表型(de Almeida等人,2000; Guilliams等人,2013)。人骨髓衍生的MSC用线粒体特异性荧光染色标记,广泛洗涤,以1:20(MSC / ...

Robust Generation of Knock-in Cell Lines Using CRISPR-Cas9 and rAAV-assisted Repair Template Delivery
Author:
Date:
2017-04-05
[Abstract]  The programmable Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR)-associated nuclease 9 (Cas9) technology revolutionized genome editing by providing an efficient way to cut the genome at a desired location (Ledford, 2015). In mammalian cells, DNA lesions trigger the error-prone non-homologous end joining (NHEJ) DNA repair mechanism. However, in presence of a DNA repair template, Homology-Directed Repair (HDR) can occur leading to precise repair of the lesion site. This last process can be exploited to enable precise knock-in changes by introducing the desired genomic ... [摘要]  可编程集群定期间隔短回归度(CRISPR)相关核酸酶9(Cas9)技术通过提供在所需位置切割基因组的有效方式,彻底改变了基因组编辑(Ledford,2015)。 在哺乳动物细胞中,DNA损伤触发易发生非同源末端连接(NHEJ)DNA修复机制。 然而,在DNA修复模板的存在下,可以发生同源性定向修复(HDR),导致病变部位的精确修复。 可以利用最后的方法,通过在修复模板上引入所需的基因组改变来实现精确的敲入变化。 在本协议中,我们描述了使用重组腺相关病毒(rAAV)在人细胞系中进行基于CRISPR-Cas9的C-末端标签序列敲入的长修复模板(> 200个核苷酸)的递送。

尽管有关CRISPR-Cas9产生的敲门模型系统的大量报告,敲门砖报告仍然落后。由于许多应用,产生敲入细胞系仍然是基因组编辑的明显目标。敲入改变的引入通常依赖于修复模板DNA的存在,并且在位点特异性双链(ds)DNA断裂被引入接近改变位点的基因组中后,HDR修复机制的激活。不同的模板可以传送到修复机器,范围从含有广泛同源区域和可选选择盒的经典线性化载体到约200个核苷酸的单链(ss)DNA寡核苷酸(Chen等人, ...

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