Rebrikov D V, Britanova O V, Gurskaya N G, Lukyanov K A, Tarabykin V S, Lukyanov S A
Shemiakin and Ovchinnikov Institute of Bioorganic Chemistry RAS, Miklukho-Maklaya 16/10, 117871 Moscow, Russia.
Nucleic Acids Res. 2000 Oct 15;28(20):E90. doi: 10.1093/nar/28.20.e90.
Suppression subtractive hybridization (SSH) is one of the most powerful and popular methods for isolating differentially expressed transcripts. However, SSH-generated libraries typically contain some background clones representing non-differentially expressed transcripts. To overcome this problem we developed a simple procedure that substantially decreases the number of background clones. This method is based on the following difference between target and background cDNAs: each kind of background molecule has only one orientation with respect to the two different flanking adapter sequences used in SSH, while truly differentially expressed target cDNA fragments are represented by both sequence orientations. The described method selects the molecules that arose due to hybridization of such mirror-orientated molecules. The efficiency of this method was demonstrated in both model and real experimental subtractions.
抑制性消减杂交(SSH)是分离差异表达转录本最强大且最常用的方法之一。然而,SSH产生的文库通常包含一些代表非差异表达转录本的背景克隆。为克服这一问题,我们开发了一种简单的程序,可大幅减少背景克隆的数量。该方法基于目标cDNA与背景cDNA之间的以下差异:每种背景分子相对于SSH中使用的两种不同侧翼接头序列仅有一种方向,而真正差异表达的目标cDNA片段由两种序列方向代表。所描述的方法选择由这种镜像方向分子杂交产生的分子。该方法的效率在模型和实际实验消减中均得到了证明。