Objective： To screen the proteins interacting with the Treg specification factor forkhead box protein P3 （FOXP3） by yeast two-hybrid system, Methods： Human FOXP3 gene was amplified by nest RT-PCR from peripheral blood mononuclear cells （PBMC） and inserted into plasmid pGBKT7 to construct the bait vector, then the self-activation and toxicity of the bait vector in host yeast strain AH109 were observed. Thereafter, a human liver cDNA library was screened by the bait vector. The positive clones were selected out by nutrient-deficient culture and back-hybridizing. The sequences from the candidate positive clones were blasted and analyzed by bioinformatics methods. Results： The constructed bait vector encoding FOXP3 was found no self-activation and toxicity in yeast AH109. Three proteins which interacted with FOXP3, including tumor protein D52, splicing factor 3b subunit 1 and hypothetical protein, were identified. Conclusion： Three new candidate proteins interacting with FOXP3 are selected out by this yeast two-hybrid system and library, which may facilitate the further study of FOXP3 in Treg.
Zhou Lina Wu Jun Luo Gaoxing He Weifeng Chen Xiwei Bo Ganping Yuan Shunzong Zhang Xiaorong Hu Xiaohong
目的近年来诊断急性排斥反应的发生,一直朝着寻找非侵入性的检测方向努力,尿液中的蛋白可以为肾脏疾病病理变化提供线索。本次实验的目的旨在建立肾移植术后病人尿蛋白二维电泳图谱。方法利用二维凝胶电泳(Two-dimensional Gel Electrophoresis,2-DE)技术,以固相pH梯度等电聚焦为第一向,改良等电聚焦的电压在3500V,总伏小时为14000 Vh;12%的SDS-PAGE进行第二向电泳,银染显色。结果得到了令人满意的肾移植术后发生急性排斥反应患者尿蛋白二维电泳图。结论此方法,可为后续利用蛋白质组技术,研究急性排斥反应诊断标志物提供可靠的技术支持。
