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A chemical method for fast and sensitive detection of DNA synthesis in vivo

机译:一种快速灵敏地检测体内DNA合成的化学方法

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We have developed a method to detect DNA synthesis in proliferating cells, based on the incorporation of 5-ethynyl-2'-deoxyuri-dine (EdU) and its subsequent detection by a fluorescent azide through a Cu(I)-catalyzed [3 + 2] cycloaddition reaction ("click" chemistry). Detection of the EdU label is highly sensitive and can be accomplished in minutes. The small size of the fluorescent azides used for detection results in a high degree of specimen penetration, allowing the staining of whole-mount preparations of large tissue and organ explants. In contrast to BrdU, the method does not require sample fixation or DNA denaturation and permits good structural preservation. We demonstrate the use of the method in cultured cells and in the intestine and brain of whole animals.
机译:我们开发了一种方法,用于检测增殖细胞中的DNA合成,该方法是基于5-乙炔基2'-脱氧尿嘧啶(EdU)的掺入以及随后的荧光叠氮化物通过Cu(I)催化的[3 + 2]环加成反应(“点击”化学反应)。 EdU标签的检测高度敏感,可以在几分钟内完成。用于检测的小尺寸荧光叠氮化物导致高度的样品渗透,可对大型组织和器官外植体的整装制剂进行染色。与BrdU相比,该方法不需要样品固定或DNA变性,并且可以保持良好的结构。我们证明了该方法在整个动物的培养细胞以及肠和脑中的使用。

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