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Nextera PCR

公司名称: Illumina
产品编号: FC-121-1030
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DigiTAG–a RNA Sequencing Approach to Analyze Transcriptomes of Rare Cell Populations in Drosophila melanogaster
Author:
Date:
2020-11-05
[Abstract]  

Cell-type specific transcriptional programs underlie the development and maintenance of organs. Not only distinct cell types within a tissue, even cells with supposedly identical cell fates show a high degree of transcriptional heterogeneity. Inevitable, low cell numbers are a major hurdle to study transcriptomes of pure cell populations. Here we describe DigiTAG, a high-throughput method that combines transposase fragmentation and molecular barcoding to retrieve high quality transcriptome data of rare cell types in Drosophila melanogaster. The protocol showcases how DigiTAG can be used to

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[摘要]  [摘要]细胞类型的特定转录程序是器官的发育和维持的基础。不仅组织内不同的细胞类型,甚至具有相同细胞命运的细胞也显示出高度的转录异质性。不可避免的是,低细胞数量是研究纯细胞群体转录组的主要障碍。在这里,我们介绍DigiTAG ,这是一种高通量方法,将转座酶片段化和分子条形码相结合,以检索果蝇中稀有细胞类型的高质量转录组数据。该协议展示了DigiTAG如何可用于分析果蝇幼虫的罕见神经干细胞(II型成神经细胞)的转录组 大脑,但也可以用于其他细胞类型或模型系统。

[背景]在发育过程中,不同细胞类型之间的过渡与组织稳态之间的关系是由大量转录因子及其诱导的转录变化所精心安排的。在过去的十年中,RNA测序(RNA- seq )已成为测量整个基因组转录动力学的经典方法(Stark等,2019)。组织上的大量RNA序列不允许研究不同细胞群体的转录网络,特别是稀有细胞类型的转录网络。因此,需要提供低输入样品高质量转录组的RNA- seq方案。

在果蝇中,有限的材料通常构成分析特定组织或细胞类型的障碍。果蝇神经干细胞(称为神经母细胞)很好地说明了这一点(Homem和Knoblich ,2012)。存在成神经细胞的几个不同的亚群。例如,在果蝇的幼虫大脑中,只有16种II型成神经细胞产生神经元,神经元支配了运动和感觉处理所需的大脑区域(Walsh and ...

Low-cost and High-throughput RNA-seq Library Preparation for Illumina Sequencing from Plant Tissue
Author:
Date:
2020-10-20
[Abstract]  Transcriptome analysis can provide clues to biological processes affected in different genetic backgrounds or/and under various conditions. The price of RNA sequencing (RNA-seq) has decreased enough so that medium- to large-scale transcriptome analyses in a range of conditions are feasible. However, the price and variety of options for library preparation of RNA-seq can still be daunting to those who would like to use RNA-seq for their first time or for a single experiment. Among the criteria for selecting a library preparation protocol are the method of RNA isolation, nucleotide ... [摘要]  [摘要] 转录组分析可以为不同遗传背景或不同条件下的生物学过程提供线索。RNA测序(RNA-seq)的价格已经下降到足够低的程度,因此在各种条件下进行中大规模转录组分析是可行的。然而,对于那些希望第一次使用RNA-seq或进行单个实验的人来说,RNA-seq库制备的价格和各种选择仍然是令人望而生畏的。选择文库制备方案的标准包括RNA分离方法、核苷酸片段化以获得所需的大小范围,以及文库索引以汇集测序样本进行多路复用。在这里,我们提出了一个高质量和高通量的选择,从多聚腺苷酸mRNA制备文库用于转录组分析。高质量和高通量的方案选择都包括通过磁珠使poly-A尾部沉淀,cDNA合成,然后通过Tn5介导的“标记”同时裂解和添加适配器的步骤。该方案的所有步骤均已通过拟南芥叶片和幼苗组织的验证,并简化为协同工作,在资金和时间上成本最低,因此旨在为转录组分析提供一个初学者友好的从开始到完成的RNA序列库制备。

[背景] 通过Southern印迹、expressed sequence ...

Adapting the Smart-seq2 Protocol for Robust Single Worm RNA-seq
Author:
Date:
2018-02-20
[Abstract]  Most nematodes are small worms that lack enough RNA for regular RNA-seq protocols without pooling hundred to thousand of individuals. We have adapted the Smart-seq2 protocol in order to sequence the transcriptome of an individual worm. While developed for individual Steinernema carpocapsae and Caenorhabditis elegans larvae as well as embryos, the protocol should be adaptable for other nematode species and small invertebrates. In addition, we describe how to analyze the RNA-seq results using the Galaxy online environment. We expect that this method will be useful for the ... [摘要]  大多数线虫是小蠕虫,缺乏足够的RNA用于常规的RNA-seq协议,而没有汇集成千上万的个体。 我们已经调整了Smart-seq2协议来排序单个蠕虫的转录组。 虽然针对Steinernema carpocapsae和Caenorhabditis elegans幼虫以及胚胎开发,但该方案应该适用于其他线虫物种和小无脊椎动物。 另外,我们介绍如何使用Galaxy在线环境分析RNA-seq结果。 我们预计这种方法将有助于研究野生型和突变体背景个体线虫的基因表达差异。

【背景】低输入RNA-seq方案和扩增试剂盒,例如Smart-seq(Takara Bio,USA,Inc)和SuperAmp(Miltenyl Biotec,Inc),已经越来越多地开发和商业化,作为对低输入RNA-基于小组织,单一微生物和单细胞的seq研究。这些研究经常探索并解决特定群体(例如细胞群体,复杂组织或微生物群体)的个体中的异源基因表达。针对微生物(如线虫)的低输入RNA-seq方案的改进和适应将通过允许在单一线虫水平上分析基因表达异质性而极大地有益于线虫领域。在这里,我们已经调整了单细胞RNA-seq方案Smart-seq2(Picelli等人,2013和2014; Trombetta等人,2014),对于单线虫RNA测序。我们成功地在昆虫寄生线虫Steinernema ...

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