IgA肾病肾阴虚证cDNA文库的构建

目的应用抑制性消减杂交(suppression subtractive hybridization,SSH)技术构建汉族人IgA肾病肾阴虚证cDNA消减文库。方法选择IgA肾病且中医辨证为肾阴虚证的患者以及正常人作为其对照组,进行正向和反向消减杂交。采用TrizolBD法提取总RNA,用SMART技术逆转录并扩增总cDNA,用RsaⅠ酶切基因组cDNA成大小不等的片段,分别与两种不同的接头连接,进行2次消减杂交及2次抑制性PCR,然后将PCR产物与U载体连接,经蓝白斑筛选后,再用PCR方法插入片段筛选出阳性重组质粒,构建IgA肾病肾阴虚证消减文库。结果用SSH方法筛选出了IgA肾病肾阴虚证的差异cDNA片段,其中正向消减文库共获得325个阳性克隆,反向消减文库获得306个阳性克隆,从而成功地构建了IgA肾病肾阴虚证的cDNA消减文库。结论SSH技术能够快速有效地分离差异cDNA片段,成功构建了IgA肾病肾阴虚证的cDNA文库,为进一步克隆肾阴虚证的相关基因奠定了基础。

Establishment of cDNA Substractive Library from Kidney-yin Deficiency Patients with IgA Nephropathy

Objective To construct cDNA substractive library from kidney-yin deficiency patients with IgA nephropathy by suppression subtractive hybridization (SSH). Method Total RNAs from normal and disease patients were isolated using Trizol BD. cDNA was produced by SMART RT-PCR. SSH was used to obtain genes associated with kidney-yin deficiency of IgA nephropathy by comparing blood cDNA of patients with kidney-yin deficiency of IgA nephropathy (as Tester or Driver) with normal blood cDNA (as Tester or Driver). After...