{{'Search' | translate}}
 

CriterionTM Blotter With Plate Electrodes

具有平板电极的标准TM

Company: Bio-Rad Laboratories
Catalog#: 1704070
Bio-protocol()
Company-protocol()
Other protocol()

Isolation, Purification and Characterization of Exosomes from Fibroblast Cultures of Skeletal Muscle
Author:
Date:
2020-04-05
[Abstract]  Exosomes are dynamic nanovesicles secreted by virtually all cells and are present in all biological fluids. Given their highly heterogeneous content exosomes have been implicated in many physiological and pathological processes that they exert by influencing cell-cell and cell-ECM communication. In recent years an increasing number of methods have been established for the purification and characterization of exosomes. These include ultracentrifugation, ultrafiltration, size exclusion chromatography, immune capture and precipitation using a proprietary polymer. Here, we provide a protocol based on differential ultracentrifugation and sucrose density gradients tailored for the isolation of crude and ultra-pure exosomes from primary fibroblast cultures derived from adult mouse skeletal ... [摘要]  [摘要 ] 外来体是几乎所有细胞分泌的动态纳米囊泡,并存在于所有生物体液中。鉴于它们的异质含量很高,外泌体已牵涉到它们通过影响细胞-细胞和细胞-ECM通讯而发挥的许多生理和病理过程。近年来,已经建立了越来越多的方法外泌体的纯化和表征。其中包括超速离心,超滤,尺寸排阻色谱,免疫捕获和使用专有聚合物的沉淀。在这里,我们提供了基于差分超速离心和蔗糖密度梯度的协议,该协议专门用于从成年小鼠骨骼肌衍生的原代成纤维细胞培养物中分离粗制和超纯外泌体。可以对该协议进行修改和修改,以从各种组织和体液中分离和表征外泌体。


背景 ] ë xosomes是单膜,异质纳米囊泡直径范围从30至150nm,secre 由所有细胞和存在于几乎所有的体液泰德。外泌体中存在的可溶性和膜大分子,mRNA,microRNA的光谱取决于代谢状态以及分泌这些纳米囊泡的细胞的发育起源。由于它们的货物组成,外泌体可以启动接收细胞中的信号传导途径,并参与了发育,免疫和正常组织生理的维持。在神经退行性疾病,纤维化和癌症等疾病条件下,它们被证明可以触发和传播病理刺激(Rackov 等,2018; Gurunathan 等,2019; van de Vlekkert 等,2019)。在这里,我们描述了从成年小鼠腓肠肌(GA)肌肉建立的成纤维细胞培养物中纯化外泌体的方案(van de Vlekkert ...

Liposome Flotation Assay for Studying Interactions Between Rubella Virus Particles and Lipid Membranes
Author:
Date:
2018-08-20
[Abstract]  Rubella virus (RuV) is an enveloped, positive-sense single-stranded RNA virus that is pathogenic to humans. RuV binds to the target cell via the viral envelope protein E1, but the specific receptor molecules on the target cell are yet to be fully elucidated. Here, we describe a protocol for liposome flotation assay to study direct interactions between RuV particles and lipid membranes in a qualitative manner. Interactions are examined by a Nycodenz density gradient fractionation using UV-inactivated RuV particles and fluorescent-labeled liposomes consisting of pure lipids. Fractionated RuV particles are detected using standard sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) followed by Western blot analysis for viral proteins. On the Nycodenz gradient, RuV particles ... [摘要]  风疹病毒(RuV)是一种包膜的正义单链RNA病毒,对人类具有致病性。 RuV通过病毒包膜蛋白E1与靶细胞结合,但靶细胞上的特异性受体分子尚未完全阐明。在这里,我们描述了脂质体浮选测定的方案,以定性方式研究RuV颗粒和脂质膜之间的直接相互作用。使用UV-灭活的RuV颗粒和由纯脂质组成的荧光标记的脂质体通过Nycodenz密度梯度分级检查相互作用。使用标准十二烷基硫酸钠 - 聚丙烯酰胺凝胶电泳(SDS-PAGE)检测分级的RuV颗粒,然后对病毒蛋白进行Western印迹分析。在Nycodenz梯度上,与未结合的RuV颗粒相比,与脂质体结合的RuV颗粒转移至较低密度的部分。使用该方案,我们提供了令人信服的证据,即在中性pH下以钙依赖性方式,RuV颗粒与某些细胞类型中含有鞘磷脂(SM)和胆固醇的脂质膜结合。

【背景】 风疹病毒是“风疹”的致病因子,“风疹”是一种急性且相对轻微的全身性感染和“先天性风疹综合征”,一种导致严重出生缺陷的转胎胎儿感染(Hobman,2013)。阐明RuV进入的分子机制对于了解病毒病理学和帮助开发抗RuV药物是必不可少的。虽然以前的研究表明宿主细胞的膜脂质作为RuV受体(Mastromarino et al。,1989和1990; DuBois et ...

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 alteration on the repair template. In this protocol we describe the delivery of long repair templates (> 200 nucleotides) using recombinant Adeno Associated Virus (rAAV) for CRISPR-Cas9-based knock-in of a ... [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, ...

Comments