【摘要】 目的利用抑制消减杂交方法筛选和鉴定某雄性激素不敏感综合征家系中1名可育患者与1名不育患者间的差异表达基因。方法分别以可育患者(MJ)和不育患者(ZGJ)的生殖器皮肤成纤维细胞(GSF)为实验方,构建正向和反向消减文库。通过菌落原位杂交、点杂交、Southern印迹法逐步筛选得到候选阳性克隆,利用Northern印迹法验证,并将获得的阳性克隆进行测序和同源性分析。结果构建了这两名患者GSF的正向和反向消减文库,筛选得到反向消减文库中2个Northern阳性克隆,以及两文库中11个无Northern杂交信号、可能代表低丰度转录本的候选克隆。测序和同源性分析显示2个Northern阳性克隆分别与自家趋化素(autotaxin-t)基因和钙结合蛋白S100A6基因高度同源。结论以上2个Northern阳性克隆以及11个无Northern杂交信号的克隆可能代表两患者GSF的差异表达基因,有助于阐明雄性激素不敏感综合征家系中患者表型多样性及育性保留的分子机制。更多还原

【Abstract】 Objective To screen and identify differentially expressed genes between a fertile patient and another infertile patient who belonged to a large Chinese pedigree affected with androgen insensitivity syndrome (AIS). Methods We constructed the forward and reversed subtracted libraries using genital skin fibroblasts(GSF),which were obtained from the fertile patient MJ and infertile patient ZGJ,as tester respectively. Candidate clones were screened with colony in situ hybridization,dot blot,and Southern blot analysis step by step and conformed with Northern blot analysis. The potential positive clones were sequenced and the homology of the sequences was analyzed. Results The forward and reversed subtracted libraries containing differentially expressed pattern of two GSF cell lines were constructed. Two positive clones identified by Northern blot were obtained in the reversed subtracted library. Eleven candidate clones from the two libraries that failed to hybridize with both RNA populations were obtained simultaneously,which might represent differentially expressed low abundance transcripts. Sequencing results and homology analysis demonstrated that the two positive cloneswere significantly homologous with the genes of autotaxin-t and calcium binding protein calcyclin (S100A6),respectively. Conclusions Two positive clones and eleven clones showing no hybridization signals may represent differentially expressed genes between the two GSFs. This finding may be useful to elucidate the molecular mechanisms leading to phenotypic variation and preserved fertility of the AIS pedigree.更多还原