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Medium 199

中199

Company: Sigma-Aldrich
Catalog#: M0650
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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 - ...

Construction of FWPV Chimaeric MVA
Author:
Date:
2015-01-05
[Abstract]  Construction of chimaeric MVA is a useful tool with which to study gene function of related viruses. The protocol given here describes MVA chimaeras containing genes from Fowlpox virus (FWPV), although this can be applied to DNA derived from other organisms. There are a number of steps required to make the chimaeric MVA: 1) Purification of viral particles; 2) Extraction of DNA from purified viral particles; 3) Assembly of linear recombination templates; 4) Transfection of linear recombination templates; 5) Selection of chimaeric MVA.
Note: This procedure uses live virus, and should be conducted using Good Microbiological Practice, in accordance with international and national biocontainment requirements. This procedure also involves Genetic Modification of microorganisms, and ...
[摘要]  嵌合MVA的构建是研究相关病毒的基因功能的有用工具。 本文给出的方案描述了含有来自鸡痘病毒(FWPV)的基因的MVA嵌合体,尽管这可以应用于来自其他生物体的DNA。 制备嵌合MVA需要许多步骤:1)病毒颗粒的纯化; 2)从纯化的病毒颗粒中提取DNA; 3)装配线性重组模板; 4)线性重组模板的转染; 5)嵌合MVA的选择。
注意:此程序使用活病毒,并应根据国际和国家生物承诺要求使用良好微生物实践进行。 该程序还涉及微生物的遗传修饰,并且在开始前应获得适当的安全批准。

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