{{'Search' | translate}}
 

MluI-HF

MluI-HF®

Company: New England Biolabs
Catalog#: R3198S
Bio-protocol()
Company-protocol()
Other protocol()

Multiplex T-cell Stimulation Assay Utilizing a T-cell Activation Reporter-based Detection System
Author:
Date:
2021-01-20
[Abstract]  

Immune tolerance and response are both largely driven by the interactions between the major histocompatibility complex (MHC) expressed by antigen presenting cells (APCs), T-cell receptors (TCRs) on T-cells, and their cognate antigens. Disordered interactions cause the pathogenesis of autoimmune diseases such as type 1 diabetes. Therefore, the identification of antigenic epitopes of autoreactive T-cells leads to important advances in therapeutics and biomarkers. Next-generation sequencing methods allow for the rapid identification of thousands of TCR clonotypes from single T-cells, and thus there is a need to determine cognate antigens for identified TCRs. This protocol describes a reporter system of T-cell activation where the fluorescent reporter protein ZsGreen-1 is driven by nuclear

...
[摘要]  [摘要] 免疫耐受和应答都很大程度上由抗原呈递细胞(APC)表达的主要组织相容性复合物(MHC),T细胞上的T细胞受体(TCR)及其同源抗原之间的相互作用驱动。相互作用障碍导致自身免疫性疾病(例如1型糖尿病)的发病机理。因此,鉴定自身反应性T细胞的抗原表位导致治疗和生物标志物的重要进展。下一代测序方法可从单个T细胞快速鉴定数千种TCR克隆型,因此需要确定已鉴定TCR的同源抗原。该协议描述了T细胞活化的报告系统,其中荧光报告蛋白ZsGreen-1由活化T细胞的核因子(NFAT)信号驱动并通过流式细胞仪读取。记者T细胞也组成性表达额外的一对荧光素tein作为识别物,允许同时多路复用多达8种不同的报告T细胞系,每种表达不同的目标TCR,可通过流式细胞仪区分。一旦制成TCR表达细胞系,仅需一个转导步骤即可将其无限期用于制备新的T细胞系。这种多路复用系统允许筛选TCR-抗原相互作用的数量,否则这些相互作用将是不切实际的,可在多种情况下使用(即,筛选单个抗原或抗原库),并可用于研究任何T细胞-MHC-抗原三分子相互作用。

[背景] T细胞,抗原呈递细胞(APC)及其同源抗原之间的相互作用是自身免疫性疾病(例如1型糖尿病)的主要事件(Michels等,2017; ...

Transfer of Large Contiguous DNA Fragments onto a Low Copy Plasmid or into the Bacterial Chromosome
Author:
Date:
2016-11-20
[Abstract]  Bacterial pathogenicity islands and other contiguous operons can be difficult to clone using conventional methods due to their large size. Here we describe a robust 3-step method to transfer large defined fragments of DNA from virulence plasmids or cosmids onto smaller autonomously replicating plasmids or directly into defined sites in the bacterial chromosome that incorporates endogenous yeast and λ Red homologous recombination systems. This methodology has been successfully used to isolate and integrate at least 31 kb of contiguous DNA and can be readily adapted for the recombineering of E. coli and its close relatives. [摘要]  由于其大尺寸,细菌致病性岛和其它连续操纵子可能难以使用常规方法克隆。在这里我们描述了一个强大的3步法从毒力质粒或粘粒转移大型定义的片段到更小的自主复制质粒或直接到细胞染色体,并入内源性酵母和λ红色同源重组系统的定义网站。该方法已经成功地用于分离和整合至少31kb的连续DNA,并且可以容易地适应于E的重组。大肠杆菌及其近亲。

[背景] 分离和繁殖大片DNA的能力大大扩展了基因网络和操纵子的研究。然而,用于该目的的传统使用的工程质粒,例如细菌人工染色体(BAC),虽然极其有用,但是受到DNA稳定性,拷贝数和复杂装配要求的问题的限制。或者,将构建体直接并入细菌染色体中通过减少由于存在多个基因拷贝引起的基因表达的变化以及确保基因的稳定维持而提供了优点,同时还避免了对抗生素选择的需要。这里描述的方法最初被设计为捕获和转移编码Shigella flexneri 3型分泌系统的31kb DNA操纵子到大肠杆菌染色体上(Reeves ...

Comments