一种进行基因表达研究的有效技术--小鼠全胚胎RNA原位杂交

目的　建立小鼠整体胚胎水平研究基因表达的方法。　方法　采用地高辛配基标记的造血相关基因 Runx1和神经发生相关基因 Runx3RNA探针 ,对 10 .5～ 14天小鼠全胚胎进行 RNA原位杂交 ,通过检测胚胎组织中 m RNA的存在状况来观察基因的表达。结果　在小鼠胚胎观察到 Runx1和 Runx3基因在不同组织中的清晰的杂交信号 ;不同探针和不同大小的胚胎需要不同的最适蛋白酶 K处理条件。　结论　小鼠全胚胎 RNA原位杂交技术是一种有效的研究基因表达的方法 ,可以从整体水平反映基因表达的全貌 ,在功能基因组学时代将具有很大的应用潜力 ,为基因表达研究提供了一种可与 L ac Z染色和免疫组织化学媲美的选择。蛋白酶 K处理条件是否适当是小鼠全胚胎 RNA原位杂交成功的关键因素。

Mouse whole mount RNA in situ hybridization:an effective technique for analyzing gene expression

ObjectiveTo set up a method of analyzing gene expression profile from mouse whole embryos.MethodsMouse whole mount RNA in situ hybridization(WM-ISH) of E10.5-E14 embryos was carried out by using digoxigenin-labeled Runx1 and Runx3 RNA probes and their expression profile was observed by detecting the existence and status of corresponding mRNAs in the embryonic tissues.ResultsClear hybridization signals were observed in different tissues and organs hybridized by Runx1 or Runx3 RNA probe. Different probes and ages of embryos had need of their own optimal proteinase K treatment conditions.ConclusionMouse whole mount RNA in situ hybridization is an effective method of analyzing gene expression. It is useful for revealing whole gene expression profile and has a great potentiality in the era of functional genomics. It provides an alternative method of studies on gene expression which is at least as good as LacZ staining and immunohistochemistry. The key factor of the success to mouse whole mount RNA in situ hybridization is whether the proteinase K treatment conditions are optimal or not.