| Production of Phenotypically Uniform Human Cerebral Organoids from Pluripotent Stem Cells
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Author:
Date:
2021-04-20
[Abstract] Recent advances in stem cell technology have allowed researchers to generate 3D cerebral organoids (COs) from human pluripotent stem cells (hPSCs). Indeed, COs have provided an unprecedented opportunity to model the developing human brain in a 3D context, and in turn, are suitable for addressing complex neurological questions by leveraging advancements in genetic engineering, high resolution microscopy, and tissue transcriptomics. However, the use of this model is limited by substantial variations in the overall morphology and cellular composition of organoids derived from the same pluripotent cell line. To address these limitations, we established a robust, high-efficiency protocol for the production of consistent COs by optimizing the initial phase of embryoid body (EB) formation and ...
[摘要] [摘要]在干细胞技术的最新进展已经使研究人员能够产生3D脑类器官由人多能干细胞（（COS）hPSCs ）。事实上，COS提供了一个前所未有的机会，发展人的大脑在3D场景模型，并反过来，适用于通过利用在进步，基因工程，高分辨率显微镜处理复杂的神经系统的问题，并组织转录。然而，在U SE 该模型的模型受到源自同一多能细胞系的类器官的整体形态和细胞组成的实质性变化的限制。为了解决这些限制，我们建立了坚固的，高-通过优化的初始阶段用于生产相一致的COS效率协议胚状体（EB）形成和神经诱导。使用该协议，采购员可以重复地与产生一个均匀的尺寸，形状，以及跨多个批次的细胞组合物。˚F urthermore，类器官的是发展了延长的时间段（3 - 6个月）显示建立的相对成熟的功能，包括电生理学活性的神经元，少突胶质细胞和祖细胞的产生。因此，该平台提供了可用于研究人脑发育和相关疾病的强大实验模型。
图形摘要：
多能干细胞对脑类器官发育的概述
[背景技术]在最新进展在体外从人多能干细胞（衍生3D脑类器官（COS）的发展hPSCs ...
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| Low-cost and High-throughput RNA-seq Library Preparation for Illumina Sequencing from Plant Tissue
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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 fragmentation to obtain desired size range, and library indexing to pool sequencing samples for multiplexing. Here, we present a high-quality and a high-throughput option for preparing libraries from ...
[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 ...
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