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StemPro® Accutase® Cell Dissociation Reagent

Company: Gibco
Catalog#: A1110501
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An in vitro DNA Sensor-based Assay to Measure Receptor-specific Adhesion Forces of Eukaryotic Cells and Pathogens
Author:
Date:
2020-09-05
[Abstract]  Motility of eukaryotic cells or pathogens within tissues is mediated by the turnover of specific interactions with other cells or with the extracellular matrix. Biophysical characterization of these ligand-receptor adhesions helps to unravel the molecular mechanisms driving migration. Traction force microscopy or optical tweezers are typically used to measure the cellular forces exerted by cells on a substrate. However, the spatial resolution of traction force microscopy is limited to ~2 µm and performing experiments with optical traps is very time-consuming.

Here we present the production of biomimetic surfaces that enable specific cell adhesion via synthetic ligands and at the same time monitor the transmitted forces by using molecular tension sensors. The ligands were ...
[摘要]  [摘要 ] 组织内真核细胞或病原体的运动性是通过与其他细胞或细胞外基质特异性相互作用的转换来介导的。这些配体-受体粘附的生物物理特征有助于揭示驱动迁移的分子机制。牵引力显微镜或光学镊子通常用于测量细胞在基质上施加的细胞力。但是,牵引力显微镜的空间分辨率仅限于〜2 µm,使用光阱进行实验非常耗时。

在这里,我们介绍了仿生表面的生产,该表面能够通过合成配体实现特定的细胞粘附,同时通过使用分子张力传感器监控传递的力。将配体与双链DNA探针偶联,该探针具有确定的DNA解链力阈值。从而将pN范围内的受体介导力半定量转换为荧光信号,可以通过标准荧光显微镜在分辨率极限(〜0.2 µm)上检测到。

该测定的模块化设计允许改变所呈现的配体和DNA探针的机械强度,这为探测不同的真核细胞类型和病原体的粘附提供了多种可能性,此处以骨肉瘤细胞和伯氏疟原虫子孢子体为例。

[背景 ] 运动细胞和病原体以多种不同方式与环境相互作用(Parsons 等,2010; Nan ,2017; Muthinja 等,2018 )。例如,跨膜受体将单个细胞锚定在其环境中,并使其与其他细胞相互作用(Hynes ,1992)。整联蛋白是将细胞连接到细胞外基质的主要受体,它以双向方式传递力(Schoen et ...

Rapid Generation of Human Neuronal Cell Models Enabling Inducible Expression of Proteins-of-interest for Functional Studies
Author:
Date:
2020-05-05
[Abstract]  CRISPR-Cas9 technology has transformed the ability to edit genomic sequences and control gene expression with unprecedented ease and scale. However, precise genomic insertions of coding sequences using this technology remain time-consuming and inefficient because they require introducing adjacent single-strand cuts through Cas9 nickase action and invoking the host-encoded homology-directed repair program through the concomitant introduction of large repair templates. Here, we present a system for the rapid study of any protein-of-interest in two neuronal cell models following its inducible expression from the human AAVS1 safe harbor locus. With lox-flanked foundation cassettes in the AAVS1 site and a tailor-made plasmid for accepting coding sequences-of-interest in ... [摘要]  [摘要] CRISPR-Cas9技术以前所未有的简便性和规模改变了编辑基因组序列和控制基因表达的能力。但是,由于需要引入相邻的单链,因此使用该技术进行精确的基因组编码插入仍然很耗时且效率低下。通过减少Cas9切口酶的作用并通过同时引入大型修复模板来调用宿主编码的同源性指导的修复程序。在此,我们提出了一种系统,用于在其诱导后的两个神经元细胞模型中快速研究任何目的蛋白该系统可从人类AAVS1 安全港基因座表达,在AAVS1 位点具有lox侧翼的基础盒和定制的质粒以接受感兴趣的编码序列,该系统使研究人员能够为诱导型产生自己的神经元细胞模型任何编码表达序列不到一个月的时间。由于可用性Preinserted 增强型绿色的Fluo 可以与目标蛋白质融合的最新蛋白质(EGFP)编码序列,该系统可帮助功能研究通过活细胞显微镜以及利用非常有效的可用性进行的相互作用组分析来跟踪目标蛋白质EGFP捕获矩阵。

[背景] ...

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