| Advances in Proximity Ligation in situ Hybridization (PLISH)
|
|
Author:
Date:
2020-11-05
[Abstract] Understanding tissues in the context of development, maintenance and disease requires determining the molecular profiles of individual cells within their native in vivo spatial context. We developed a Proximity Ligation in situ Hybridization technology (PLISH) that enables quantitative measurement of single cell gene expression in intact tissues, which we have now updated. By recording spatial information for every profiled cell, PLISH enables retrospective mapping of distinct cell classes and inference of their in vivo interactions. PLISH has high sensitivity, specificity and signal to noise ratio. It is also rapid, scalable, and does not require expertise in molecular biology so it can be easily adopted by basic and clinical researchers.
[摘要] [摘要]在发育,维持和疾病的背景下了解组织需要确定单个细胞在其天然体内空间范围内的分子谱。我们开发了一种邻近连接原位杂交技术(PLISH),该技术能够定量测量完整组织中单细胞基因的表达,现已更新。通过记录每个分析细胞的空间信息,PLISH可以回顾性绘制不同细胞类别并推断其体内 互动。PLISH具有很高的灵敏度,特异性和信噪比。它也快速,可扩展,并且不需要分子生物学方面的专门知识,因此基础和临床研究人员可以轻松地采用它。
[背景技术]我们最近开发了一种复用原位称为PLISH(邻位连接杂交技术原位杂交)(Nagendran等人,2018)。PLISH与其他现有的空间转录组学技术不同,因为它结合了高性能,快速多路复用,低成本和技术简单性(Wilbrey -Clark等人,2020年)。可以通过自动计算完整的冷冻或石蜡包埋组织中单细胞表达图谱来分析PLISH结果,它与同时进行的免疫染色兼容。
...
|
|
|
| TetR Regulated in vivo Repression Technology to Identify Conditional Gene Silencing in Genetically Engineerable Bacteria Using Vibrio cholerae Murine Infections as Model System
|
|
Author:
Date:
2020-10-05
[Abstract] Investigation of bacterial gene regulation upon environmental changes is still a challenging task. For example, Vibrio cholerae, a pathogen of the human gastrointestinal tract, faces diverse transient conditions in different compartments upon oral ingestion. Genetic reporter systems have been demonstrated to be extremely powerful tools to unravel gene regulation events in complex conditions, but so far focused mainly on gene induction. Herein, we describe the TetR-controlled recombination-based in vivo expression technology TRIVET, which allows detection of gene silencing events. TRIVET resembles a modified variant of the in vivo expression technology (IVET) as well as recombination-based in vivo expression technology (RIVET), which were used to ...
[摘要] [摘要]研究细菌基因对环境变化的调控仍然是一项艰巨的任务。例如,人胃肠道的病原体霍乱弧菌在口服后会在不同的隔室中遇到各种短暂的状况。事实证明,遗传报告系统是揭示复杂条件下基因调控事件的极有力工具,但到目前为止,它主要集中在基因诱导上。在本文中,我们描述了基于TetR控制的重组的体内表达技术TRIVET,该技术可检测基因沉默事件。TRIVET类似于体内表达技术(IVET)以及基于重组的体内变异体 表达技术(RIVET),用于鉴定宿主定殖过程中几种细菌的条件基因诱导。像它的前辈一样,TRIVET是一个基于单细胞的报告系统,可以通过耐药谱的表型变化以时空方式分析细菌基因的阻遏。简而言之,无启动子的tetR (编码转录阻遏物TetR)可通过转座子诱变随机地整合到细菌基因组中,或通过同源重组在目标启动子的下游特异性整合到细菌基因组中。的TetR导致的去阻遏的转录表达的减少的TetR控制解离TNPR,这反过来又导致切除ö F A Ñ抗生素抗性盒(也称为RES-盒)和改变的电阻曲线可观察到的通过划线上氨苄青霉素和卡那霉素板。然后可以将这种改变量化为抗性和非抗性分离株之间的比例。此外,新引入的第二报道基因,promot erless ...
|
|
|
| HIV-CRISPR: A CRISPR/Cas9 Screening Method to Identify Genes Affecting HIV Replication
|
|
Author:
Date:
2020-05-05
[Abstract] Screening with CRISPR/Cas9 technology has already led to significant discoveries in the fields of cancer biology, cell biology and virology. Because of the relatively low false discovery rates and the ability to perform high-throughput, pooled approaches, it has rapidly become the assay of choice for screening studies, including whole-genome screens. Here, we describe a CRISPR screening protocol that allows for efficient screening of the entire life cycle of HIV-1 through packaging of the HIV-CRISPR lentiviral genomes by infecting HIV-1 virus in trans.
[摘要] [摘要 ] CRISPR / Cas9技术的筛选已经在癌症生物学,细胞生物学和病毒学领域引起了重大发现。由于相对较低的错误发现率和执行高通量,合并方法的能力,它发展迅速。成为筛选研究(包括全基因组筛选)的首选检测方法。在此,我们描述了一种CRISPR筛选方案,该方案可通过感染HIV-CRISPR慢病毒基因组来包装,从而有效筛选HIV-1的整个生命周期。病毒1 在 跨。
[背景] 遗传筛选是鉴定影响包括人类免疫缺陷病毒(HIV)在内的病毒复制的新基因的有力工具。鉴定对HIV感染重要的宿主基因有助于增强对HIV复制,进化,传播和发病机制的认识,这是关键利益所在。特别是在过去十年中,通常是干扰素(IFN)刺激基因(ISG)的HIV限制因子的发现已成为逆转录病毒学领域的关键发展。限制因子已集中在过度表达筛选上,以鉴定作用广泛的抗病毒ISG (Schoggins 等,2011)或专门针对HIV的因子(Kane 等,2016)。通过转染对HIV限制因子进行了全基因组筛选siRNA的池池在靶细胞(刘等人,2011年)。然而,这些方法缺乏稳健性,Versa的钛Lity,和高通量方面 因此,我们使用CRISPR / Cas9技术开发了一种创新的ap 方法,并依靠HIV交叉包装通过CRISPR / Cas9文库转导的细胞中表达的慢病毒基因组的能力(OhAinle ...
|
|
|