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BD regular bevel needles, 25 G x 1 in

BD常规斜角针,25 G x 1英寸

Company: BD
Catalog#: 305125
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Single-molecule RNA Fluorescence in situ Hybridization (smFISH) in Caenorhabditis elegans
Author:
Date:
2017-06-20
[Abstract]  Single-molecule RNA fluorescence in situ hybridization (smFISH) is a technique to visualize individual RNA molecules using multiple fluorescently-labeled oligonucleotide probes specific to the target RNA (Raj et al., 2008; Lee et al., 2016a). We adapted this technique to visualize RNAs in the C. elegans whole adult worm or its germline, which enabled simultaneous recording of nascent transcripts at active transcription sites and mature mRNAs in the cytoplasm (Lee et al., 2013 and 2016b). Here we describe each step of the smFISH procedure, reagents, and microscope settings optimized for C. elegans extruded gonads. [摘要]  单分子RNA荧光原位杂交(smFISH)是使用针对靶RNA特异性的多个荧光标记寡核苷酸探针来观察个体RNA分子的技术(Raj等人,2008; Lee等,2016a)。 我们调整了这种技术可视化线虫整个成虫或其种系中的RNA,其能够同时记录活跃转录位点的新生转录物和细胞质中的成熟mRNA(Lee等,2013和2016b)。 在这里,我们描述针对秀丽隐杆线虫挤压性腺优化的smFISH程序,试剂和显微镜设置的每个步骤。
【背景】smFISH能够在体内直接和精确地定量mRNA。 此外,通过复用smFISH探针,可以在同一细胞中同时测定多个RNA物种。 以前的出版物在线虫中使用了smFISH,但是这些研究使用了宽视野显微镜,其通常具有较低的空间分辨率并需要额外的图像处理(例如,图像去卷积)(Ji和van Oudenaarden,2012)。 在这里,我们描述了针对秀丽隐杆线虫组织优化的smFISH程序。 每个步骤都是详细的,包括使用共焦显微镜来获得精确的测量。 我们的协议最大限度地减少了样品与样品的变异性,并允许精确定量mRNA和新生转录物。

Reconstitution of Lymphopaenic Mice with Regulatory and Conventional T cell Subsets
Author:
Date:
2016-05-20
[Abstract]  Transfer of mature T cells into immunodeficient mice results in sub-optimal reconstitution of the peripheral T cell pool. Under lymphopenic conditions, dendritic cells are released from tonic control by regulatory T cells (Tregs), and consequently drive activation and proliferation of low affinity T cells specific for endogenous antigens. This oligoclonal proliferation results in a T cell population dominated by T cells possessing an effector/memory phenotype and a limited TCR repertoire. Oligoclonal expansion can be prevented by selectively reconstituting the Treg compartment prior to T cell transfer (Bolton et al., 2015). Reconstitution of the Treg compartment of lymphopenic mice has been tested in immunodeficient mouse strains such as Rag-1-/-or Rag-2-/- ... [摘要]  将成熟T细胞转移到免疫缺陷小鼠中导致外周T细胞库的次优重建。在淋巴细胞减少症状下,树突状细胞通过调节性T细胞(Tregs)从强直对照释放,并因此驱动对内源性抗原特异的低亲和力T细胞的激活和增殖。这种寡克隆增殖导致由具有效应/记忆表型和有限TCR库的T细胞支配的T细胞群。可以通过在T细胞转移之前选择性重建Treg区室来防止寡克隆扩增(Bolton等人,2015)。已经在免疫缺陷小鼠品系例如Rag-1 /或 Rag-2 -/- 中测试了淋巴细胞减少小鼠的Treg区室的重建。 小鼠,以及在通过致死性全身照射作为调节骨髓移植(BMT)的瞬时淋巴细胞减少的免疫小鼠中。将纯化的Treg转移到这些宿主中,结合用外源IL-2处理7天,足以重建Treg区室并减少树突细胞共刺激分子的表达,这是防止自身反应性T细胞不适当扩增的关键过程。在Treg重建后转移的T细胞不经历快速的自发增殖,而是进行慢的内稳态分裂以用天然T细胞重新增殖T细胞库,从而允许外周T细胞库的最佳重建。

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