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DAPI

Company: Molecular Probes
Catalog#: D1306
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Ligand and Carbohydrate Engagement (LACE) Assay and Fluorescence Quantification on Murine Neural Tissue
Author:
Date:
2021-03-20
[Abstract]  

The interaction between cell surface heparan sulphate and diffusible ligands such as FGFs is of vital importance for downstream signaling, however, there are few techniques that can be used to investigate this binding event. The ligand and carbohydrate engagement (LACE) assay is a powerful tool which can be used to probe the molecular interaction between heparan sulphate and diffusible ligands and can detect changes in binding that may occur following genetic or pharmacological intervention. In this protocol we describe an FGF17:FGFR1 LACE assay performed on embryonic mouse brain tissue. We also describe the method we have used to quantify changes in fluorescent LACE signal in response to altered HS sulphation.

[摘要]  [摘要]细胞表面硫酸乙酰肝素与可扩散配体(例如FGFs)之间的相互作用对于下游信号传导至关重要,但是,很少有技术可用于研究这种结合事件。配体和碳水化合物结合(LACE)分析是一种功能强大的工具,可用于探测硫酸乙酰肝素与可扩散配体之间的分子相互作用,并可检测在遗传或药理学干预后可能发生的结合变化。在此协议中,我们描述了在胚胎小鼠脑组织上进行的FGF17:FGFR1 LACE分析。我们还描述了我们用来量化荧光LACE信号响应HS硫酸盐改变的变化的方法。


[背景]硫酸乙酰肝素(HS)是一种细胞外基质和细胞表面糖胺聚糖分子,可通过硫酸化进行广泛修饰。HS与包括FGF,Wnt,BMP和Slits在内的多种具有重要发展意义的信号分子相互作用。例如,在FGF信号传导期间,HS充当共受体,促进FGF配体与细胞表面FGFR受体的结合。此形成HS:FGF:FGFR需要复杂的对FGF信号发生(阿伦等人,2001) 。已显示HS的差异硫酸化会影响FGF配体与其FGFR细胞表面受体的结合。在我们最近的论文中,我们使用了配体和碳水化合物结合(LACE)分析方法来检测HS和FGF蛋白之间的相互作用(Clegg et ...

A Pulse–chase EdU Method for Detection of Cell Division Orientation in Arabidopsis and Juncus prismatocarpus Leaf Primordia
Author:
Date:
2021-01-05
[Abstract]  In plants, the morphological diversity of leaves is largely determined by cell division, especially cell division orientation. Whereas cell division itself is easily monitored, the detection and quantification of cell division orientation are difficult. The few existing methods for detection and quantification of cell division orientation are either inefficient or laborious. Here, we describe a pulse-chase strategy using a 5-ethynyl-2’-deoxyuridine (EdU) labeling assay. Plant tissues are first incubated with EdU for a short period (pulse), followed by a long incubation without EdU (chase). Using this method, the positions of daughter cells are easily detected and can be used to quantify cell division orientation. Our protocol is rapid and very efficient for quantitative analysis of ... [摘要]  [摘要]在植物中,叶片的形态多样性在很大程度上取决于细胞分裂,尤其是细胞分裂方向。尽管细胞分裂本身很容易监测,但是细胞分裂方向的检测和定量却很困难。现有的几种检测和定量细胞分裂方向的方法要么效率低下要么费力。在这里,我们描述了使用5-乙炔基-2'-脱氧尿苷(EdU )标记测定的脉冲追踪策略。首先将植物组织与EdU一起短时间(脉冲)孵育,然后在没有EdU的情况下长时间孵育(追逐)。使用这种方法,子细胞的位置易于检测,可用于量化细胞分裂方向。我们的协议可以快速有效地定量分析细胞分裂方向,并且可以同时应用于模型植物和非模型植物。

图形摘要:

通过脉冲追逐EdU方法清晰可见的植物细胞分裂对


[背景]植物细胞通过细胞壁彼此附接,并且不能迁移。因此,在叶片发育的早期,组织化,定向的细胞分裂在很大程度上决定了成熟叶片的形状。迄今为止,还没有报道用于有效和快速检测和定量细胞分裂取向的方法。现有方法包括使用ap CYCB1; 1 :: GUS (β-葡萄糖醛酸糖苷酶)报告基因线(末期)可视化子核(末期)(Horiguchi et al。,2011)或使用4',6-diamidino可视化纺锤状赤道(中期) -2-苯基吲哚(DAPI)染色(Fukushima et ...

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