Notch1胞内结构域慢病毒表达载体及干扰载体的构建  

Construction of the N1ICD lentiviral over-expression and interference vectors

作　　者：周学亮[1] 刘季春[1] 

机构地区：[1]南昌大学第一附属医院心血管外科,江西南昌330006

出　　处：《南方医科大学学报》2015年第5期692-696,共5页Journal of Southern Medical University

基　　金：国家自然科学基金(81260024);江西省自然科学基金(20122BAB205026;20132BAB205033)~~

摘　　要：目的构建高滴度大鼠N1ICD慢病毒过表达载体(LV-N1ICD)及N1ICD慢病毒干扰载体(LV-N1ICD-sh RNA)。方法以大鼠c DNA文库为模板,PCR法扩增N1ICD,通过定向克隆构建p GC-FU-N1ICD-3Flag穿梭质粒;设计4对N1ICD-sh RNA寡核苷酸序列,以构建GVC112-N1ICD-sh RNA干扰质粒,将p GC-FU-N1ICD-3Flag和GVC112-N1ICD-sh RNA共转293T细胞,检测Flag的表达,筛选理想的GVC112-N1ICD-sh RNA干扰质粒。将p GC-FU-N1ICD-3Flag或GVC112-N1ICD-sh RNA与p Helper 1.0、p Helper 2.0共转293T细胞,以包装LV-N1ICD和LV-N1ICD-sh RNA,分别利用Real-time PCR、药物筛选法进行病毒滴度测定。LV-N1ICD及LV-N1ICD-sh RNA分别感染H9c2心肌细胞,利用CCK-8检测细胞活力。结果 p GC-FU-N1ICD-3Flag和GVC112-N1ICD-sh RNA质粒经PCR、基因测序及Western-blotting验证构建成功,与p Helper 1.0、p Helper 2.0共转293T细胞后,取上清浓缩,分别获得高滴度LV-N1ICD和LV-N1ICD-sh RNA。LV-N1ICD可明显提高心肌细胞活力,LV-N1ICDsh RNA可降低心肌细胞活力。结论 LV-N1ICD和LV-N1ICD-sh RNA包装成功,具有Notch1信号通路生物学功能。Objective To construct rat N1ICD lentiviral over-expression vector （LV-N1ICD） and N1ICD lentivirus interference vector （LV-N1ICD-shRNA. Methods With the rat cDNA as a template, the N1ICD fragment was amplified by PCR to construct pGC-FU-N1ICD-3Flag shuttle plasmid by directly clone. Four pairs of N1ICD-shRNA oligonucleotide sequences were syn-thesized to construct the GVC112-N1ICD-shRNA interference plasmid. pGC-FU-N1ICD-3Flag and GVC112-N1ICD-shRNA plasmids were co-transfected into 293T cells to screen for the best interference plasmid in the 4 GVC112-N1ICD-shRNA plasmids by detecting Flag expression. pGC-FU-N1ICD-3Flag or GVC112-N1ICD-shRNA plasmid along with with pHelper 1.0 and pHelper 2.0 plasmids were co-transfect into 293T cells to package LV-N1ICD and LV-N1ICD-shRNA, and the virus titer was determined by real-time PCR and drug screening method, respectively. H9c2 cells infected with LV-N1ICD and LV-N1ICD-shRNA respectively were assessed for cell viability using CCK-8 assay. Results pGC-FU-N1ICD-3Flag and GVC112-N1ICD-shRNA plasmid were verified by PCR, gene sequencing and Western blotting. Co-transfection of the plasmids with pHelper 1.0, and pHelper 2.0 plasmids into 293T cells obtained high-titer LV-N1ICD and LV-N1ICD-shRNA. LV-N1ICD was capable of promoting the cell viability and LV-N1ICD-shRNA produced an opposite effect. Conclusion The vectors LV-N1ICD and LV-N1ICD-shRNA have been successfully constructed and packaged, which have the biological functions of Notch1 signaling.

关 键 词：NOTCH信号通路 胞内结构域 慢病毒 质粒构建 RNA干扰 病毒包装 

分 类 号：R373[医药卫生—病原生物学]