| Isolation and High Throughput Flow Cytometric Apoptosis Assay of Human Neutrophils to Enable Compound Library Screening
|
|
Author:
Date:
2020-06-05
[Abstract] The study of human neutrophils in vitro is challenging due to their short half-life and propensity for activation. However, with careful handling and manipulation in the laboratory, they can be a powerful tool to investigate immune responses in health and disease. Here we describe a method for the isolation of human neutrophils from peripheral blood samples, followed by a high-throughput screen to assess the efficacy of a library of compounds in inducing neutrophil apoptosis, which may have therapeutic potential in neutrophil-driven diseases. This protocol is based on previously-published neutrophil isolation methods utilizing Dextran sedimentation of red blood cells followed by the separation of granulocytes with plasma/Percoll discontinuous gradient centrifugation. Yields of ~1 ...
[摘要] [摘要] 人类嗜中性粒细胞的研究 由于其半衰期短且易于活化，因此体外具有挑战性，然而，通过在实验室中的仔细处理和操纵，它们可以成为研究健康和疾病中免疫反应的有力工具。在此，我们介绍了一种分离方法外周血样本中的人类嗜中性粒细胞，然后进行高通量筛选，以评估化合物库诱导嗜中性粒细胞凋亡的功效，该化合物在嗜中性粒细胞驱动的疾病中可能具有治疗潜力。此规程基于先前发表的嗜中性粒细胞分离方法利用红细胞的葡聚糖沉降，接着用等离子体/粒细胞的分离的Percoll 〜1×10个的不连续梯度centrifugation.Yields 6 每嗜中性粒细胞毫升的血液，和>的纯度95个％嗜中性粒细胞是典型的。嗜中性粒细胞与经处理的激酶抑制剂文库，然后通过流式细胞仪评估中性粒细胞凋亡的速率。低通量用于高通量筛选人类原代免疫细胞，以鉴定具有修饰嗜中性粒细胞功能的化合物，并可根据需要进行修饰以评估其他表型。
[背景] 中性粒细胞是重要的先天免疫细胞与键的角色防御抵抗infection.They是短暂的细胞中，在感染和inflammat部位延长6-8小时循环典型的半衰期离子（萨默斯等人。 。，2010 ; Hidalgo。Et Al ...
|
|
|
| High Dimensional Functionomic Analysis of Human Hematopoietic Stem and Progenitor Cells at a Single Cell Level
|
|
Author:
Date:
2018-05-20
[Abstract] The ability to conduct investigation of cellular transcription, signaling, and function at the single-cell level has opened opportunities to examine heterogeneous populations at unprecedented resolutions. Although methods have been developed to evaluate high-dimensional transcriptomic and proteomic data (relating to cellular mRNA and protein), there has not been a method to evaluate corresponding high-dimensional functionomic data (relating to cellular functions) from single cells. Here, we present a protocol to quantitatively measure the differentiation potentials of single human hematopoietic stem and progenitor cells, and then cluster the cells according to these measurements. High dimensional functionomic analysis of cell potential allows cell function to be linked to molecular ...
[摘要] 在单细胞水平进行细胞转录，信号传导和功能调查的能力为以前所未有的决议研究异质人群开启了机会。 尽管已经开发了评估高维转录组学和蛋白质组学数据（与细胞mRNA和蛋白质有关）的方法，但尚未有方法从单个细胞评估相应的高维功能组学数据（与细胞功能有关）。 在这里，我们提出了一种方案来定量测量单个人造血干细胞和祖细胞的分化潜能，然后根据这些测量结果聚集细胞。 细胞电位的高维功能组分析允许细胞功能与相同祖细胞群体内的分子机制相关联。
【背景】单细胞水平的细胞转录，信号传导和功能单细胞测量技术的发展，以及流式细胞仪等先前存在的技术的发展，使得新镜头能够检测复杂的异质群体。这些方法产生大量数据，这可以借助于降维算法来解释，如使用Mpath，Monocole，PCA，Wishbone或扩散图算法在单细胞RNA-Seq上所示的（Paul等， 2016年;参见 et al。，2017），以及使用tSNE或PhenoGraph的CyTOF（Amir et al。，2013; Levine et al 。，2015）。
我们开发了这个协议，以允许在单细胞环境中对造血祖细胞的大规模培养物进行功能分析和随后的降维。在这个协议中，我们描述了在细胞因子的基质细胞培养物中培养人CD34 ...
|
|
|
| Differentiation of Human Induced Pluripotent Stem Cells (iPS Cells) and Embryonic Stem Cells (ES Cells) into Dendritic Cell (DC) Subsets
|
|
Author:
Date:
2017-08-05
[Abstract] Induced pluripotent stem cells (iPS cells) are engineered stem cells, which exhibit properties very similar to embryonic stem cells (ES cells; Takahashi and Yamanaka, 2016). Both iPS cells and ES cells have an extraordinary self-renewal capacity and can differentiate into all cell types of our body, including hematopoietic stem/progenitor cells and dendritic cells (DC) derived thereof. This makes iPS cells particularly well suited for studying molecular mechanisms of diseases, drug discovery and regenerative therapy (Grskovic et al., 2011; Bellin et al., 2012; Robinton and Daley, 2012).
DC are the major antigen presenting cells of the immune system and thus they are key players in modulating and directing immune responses (Merad et al., 2013). DC ...
[摘要] 诱导的多能干细胞（iPS细胞）是工程干细胞，其表现出与胚胎干细胞（ES细胞，Takahashi和Yamanaka，2016）非常相似的性质。 iPS细胞和ES细胞都具有非凡的自我更新能力，可以分化成我们身体的所有细胞类型，包括造血干细胞/祖细胞和源自其的树突状细胞（DC）。这使得iPS细胞特别适用于研究疾病，药物发现和再生治疗的分子机制（Grskovic等人，2011; Bellin等人，2012; Robinton和Daley，2012）。
＆NBSP; DC是免疫系统的主要抗原呈递细胞，因此它们是调节和引导免疫应答的关键参与者（Merad等人，2013）。 DC巡逻外周和界面组织（例如，肺，肠和皮肤）以检测入侵的病原体，并且在激活时，它们迁移到淋巴结以激活和引发淋巴细胞。
＆NBSP; DC包含具有功能专门子集的表型异质家族（Schlitzer和Ginhoux，2014）。通常，经典DC（cDC）和浆细胞样DC（pDC）是分别表现出典型的和等离子体细胞样的DC形态。 cDC识别许多病原体并在激活后分泌促炎细胞因子，而pDC专门检测细胞内病原体并分泌I型干扰素（Merad等，2013; Schlitzer和Ginhoux，2014）。在被称为CD141 Clec9a + cDC1和CD1c + ...
|
|
|