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Company: Thermo Scientific Fisher
Catalog#: 14190169
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Isolation and Culture of Mouse Lung ILC2s
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Date:
2018-10-05
[Abstract]  Group 2 Innate Lymphoid Cells (ILC2) play an important role in immune responses at barrier surfaces, notably in the lung during airway allergic inflammation or asthma. Several studies have described methods to isolate ILC2s from wild-type naive mice, most of them using cell sorting to obtain a pure population. Here, we describe in detail, a simple, efficient method for isolation and culture of lung mouse ILC2s. Lungs from Rag2-/- mice pretreated with IL-33 are collected and processed into single cell suspensions. Lymphoid cells are then recovered by density gradient separation. Lin-CD45+ cells are selected by depletion of lineage positive cells followed by positive selection of CD45+ cells. Culture of the isolated cells for several days ... [摘要]  第2组先天性淋巴细胞(ILC2)在屏障表面,特别是在气道过敏性炎症或哮喘期间的肺中的免疫应答中起重要作用。一些研究已经描述了从野生型幼稚小鼠中分离ILC2的方法,其中大多数使用细胞分选来获得纯种群。在这里,我们详细描述了一种简单有效的肺小鼠ILC2分离和培养方法。收集用IL-33预处理的 Rag2 - / - 小鼠的肺并加工成单细胞悬浮液。然后通过密度梯度分离回收淋巴样细胞。通过耗尽谱系阳性细胞然后阳性选择CD45 + 细胞来选择Lin - CD45 + 细胞。将分离的细胞培养数天导致高度纯化的ILC2群体表达典型的细胞表面标志物(CD90.2,Sca1,CD25,CD127和IL-33R)。这些细胞可在培养物中扩增长达10天,并用于多种离体测定或体内过继转移实验。
【背景】第2组先天性淋巴细胞(ILC2)是组织驻留细胞,其在抗寄生虫先天免疫以及过敏性炎症的发展中起关键作用。它们通过产生大量的2型细胞因子IL-5和IL-13对上皮细胞衍生的细胞因子如白细胞介素-33(IL-33)起反应,后者又诱导嗜酸性粒细胞增多和粘液产生(Cayrol和Girard,2018)。为了更好地表征这些细胞的功能和调节,许多组通过荧光激活细胞分选(FACS)从野生型小鼠(WT)的肺中分选ILC2。由于稳定状态下肺中存在的ILC2数量较少,因此该方法导致纯化细胞的产量较低(每只小鼠1×10 ...

Human Endothelial Cell Spheroid-based Sprouting Angiogenesis Assay in Collagen
Author:
Date:
2018-09-05
[Abstract]  Angiogenesis, the formation of new blood vessels from pre-existing ones plays an important role during organ development, regeneration and tumor progression. The spheroid-based sprouting assay is a well-established and robust method to study the influence of genetic alterations or pharmacological compounds on capillary-like tube formation of primary cultured endothelial cells. A major advantage of this assay is the possibility to study angiogenesis in a 3D environment. Endothelial cells are cultured as hanging drops to form spheroids. Those spheroids are embedded into a collagen matrix and tube formation is analyzed 24 h later. By analyzing sprout number and sprout length the effects of genetic manipulation or drug treatment on angiogenesis can be investigated. [摘要]  血管生成,从先前存在的血管形成新血管在器官发育,再生和肿瘤进展中起重要作用。 基于球体的发芽测定法是一种成熟且稳健的方法,用于研究遗传改变或药理学化合物对原代培养的内皮细胞的毛细血管样管形成的影响。 该测定的主要优点是可以在3D环境中研究血管生成。 将内皮细胞培养为悬滴以形成球状体。 将这些球状体嵌入胶原基质中,24小时后分析管形成。 通过分析发芽数和发芽长度,可以研究遗传操作或药物治疗对血管生成的影响。

【背景】血管为器官提供氧气和营养。在不再满足局部需求的情况下,细胞分泌血管内皮生长因子(VEGF)以诱导新血管的形成。新的容器芽由一个由茎细胞牵引的前端细胞组成(Potente和Makinen,2017)。血管生成在生理条件下(例如,肌肉和脂肪组织的生长)以及病理条件(例如,伤口愈合,黄斑变性和肿瘤生长)发生。因此,非常需要破译协调血管生成的基本机制并测试干扰病理性血管生成的化合物。

基于球体的发芽试验由Thomas Korff博士和Hellmut Augustin博士在90年代后期开发(Korff和Augustin,1999),使研究人员能够快速研究药物或基因操作对发芽血管生成的影响。稳健的方式(Heiss et al。,2015)。基于球体的发芽测定的一个重要优点是分析3D环境中的芽形成。这促进内皮细胞之间的细胞 - ...

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