顶体素结合蛋白真核表达载体的构建及其在肝癌细胞株的表达

Construction of eukaryotic expression vector encoding ACRBP and its expression in hepatocarcinoma cells

目的:构建ACRBP真核表达载体,建立稳定表达ACRBP的人肝癌细胞株,为后继研究该基因的功能奠定基础。方法:以pMAL-C2/ACRBP重组质粒作为模板进行PCR,扩增出ACRBP编码区cDNA,并与真核表达载体pEGFP-N1连接,构建pEGFP-N1/ACRBP重组质粒。通过Fugene HD将该重组质粒转染至ACRBP表达阴性的肝癌细胞株HepG2,经G418筛选阳性克隆获得稳定转染株。RT-PCR和免疫组织化学方法检测HepG2细胞中ACRBP的表达情况。结果:pEG-FP-N1/ACRBP真核表达载体经测序证实插入序列完全正确;ACRBP基因已经稳定转染至HepG2细胞中并获得表达。结论:成功构建了pEGFP-N1/ACRBP真核表达载体并将其转染HepG2后,能稳定地表达ACRBP。

AIM： To construct the eukaryotic expression vector pEGFP-N1/ACRBP and stably express ACRBP in human hepatocarcinoma cells, providing functional clues for ACRBP. METHODS： A recombinant plasmid pMAL-C2/ACRBP was used as a template to amplify ACRBP cDNA. The PCR product was ligated into an eukaryotic expression vector pEGFP-N1 to construct a recombinant plasmid pEGFP-N1/ACRBP. Then the pEGFP-N1/ACRBP was transfected by Fugene HD into ACRBP-negative HepG2 cells. The stably transfected clones were selected by G418. RT-PCR and immunohistochemistry were used to detect the expression of ACRBP in HepG2 cells. RESULTS： The eukaryotic expression vector pEGFP-N1/ACRBP was constructed and confirmed by sequencing. The stably transfected HepG2 cells expressed ACRBP. CONCLUSION： The eukaryotic expression vector pEGFP-N1/ACRBP has been successfully constructed and transfected into HepG2 cells, resulting in stable expression of ACRBP.