摘要
目的 用分子克隆方法构建靶基因为CD4的microRNA的GFP报告载体,并观察其对MT4细胞CD4分子表达的影响.方法 在microRNA在线预测软件中寻找靶基因为CD4的microRNA.设计hsa-mir-181a基因引物,PCR后将产物与T载体连接,双酶切后与pEGFP-N1载体连接.用菌液PCR及测序鉴定正确连接入pEGFP-N1载体.测序正确后电转染MT4细胞系.用荧光定量PCR检测microRNA表达,流式分析检测CD4分子表达.结果 hsa-mir-181a为靶基因为CD4的microRNA.所构建载体测序结果证明连接产物正确.转染细胞后建靶基因为CD4的microRNA稳定表达,并能够使MT4细胞CD4表达下调.结论 表达靶基因为CD4的microRNA的GFP报告基因表达载体构建成功,并且能够抑制CD4分子的表达.本研究为microRNA成为潜在的抗HIV基因治疗工具提供了体外实验的依据.
Objective To construct expressing vector of microRNA with molecular cloning methods which target CD4 and electroporating the vector to the MT4 cell to determine its effect to CD4 expression.Methods Predict a microRNA can target CD4.Linking the pre-mir-181a PCR products to T vector,then cloning into the pEGFP-N1 vector after enzyme digestion.To test the integrity through the colony PCR and sequencing analysis.Electroporating the vector to MT4 cell,using FACS to test the CD4 expression.Results Hsa-mir-181a is able to target CD4.The sequence of the construct was correct.The hsa-mir-181a is stable expressing in MT4 after electroporating with the vector and MT4 cell CD4 was down-regulated.Conclusion The construct can be stable expressing hsa-mir-181a in MT4 cell and down-regulating the CD4 expressing.This method can be utilized as a novel intervention to the HIV fusion,it shows potential as a gene therapy tool in vitro.
出处
《中华微生物学和免疫学杂志》
CAS
CSCD
北大核心
2011年第11期1000-1006,共7页
Chinese Journal of Microbiology and Immunology
基金
国家重点基础研究发展计划（973计划）（2006CB404200）
