rAAV2/1-Acrp30病毒的纯化、扩增与活性检测

目的 将大鼠脂联素基因(Acrp30)克隆到腺相关病毒(AAV)载体中,经包装、纯化、扩增后获得rAAV2/1-Aerp30病毒,并进行活性检测.方法 筛选阳性克隆获得pSNAV2.0-Acrp30,EcoR Ⅰ/Sal Ⅰ双酶切鉴定,并行测序.转染BHK21细胞,G418筛选培养,获得抗药克隆细胞株.HSV1-re/△UL2感染,包装此细胞株并收获病毒载体rAAV2/1-Acrp30.行DNA斑点杂交法测定病毒滴度,SDS-PAGE分析判断病毒纯度,Western blot法检测目的 蛋白脂联素在HEK293细胞中的表达活性.结果 PCR电泳及酶切鉴定表明,pSNAV2.0-Acrp30重组成功,基因测序显示装入pSNAV2.0质粒中的Acrp30基因正确.rAAV2/1-Acrp30病毒的大致滴度为1.0×1012μg/ml,HEK293细胞分泌蛋白浓度为50 ng/ml,病毒载体纯度在95%以上.结论 实验获得的脂联素病毒载体滴度高、感染性好,可试用于GK(Goto-Kakizaki)大鼠脂联素转基因治疗.

Clearing, amplification and activity detection of the recombinant adeno-associated virus vector2/1with adiponectin

Objective To clear, amplify and detect the activity of the recombinant adeno-assoeiated virus vector with adiponectin( rAAV2/1-Aerp30 ). Methods Recombinant plasmid pSNAV2.0-Acrp30 was obtained. The recombinant plasmid was then transfected into BHK21 cells using LipofectAMINETM 2000. The G418 resistant cells were obtained consequently. These cells were infected with HSVI-rc/△UL2 which has the function of packaging and copying recombinant AAV. After purification, the construction of recombinant rAAV2/1-Aerp30 was collected. Results The construction of recombinant pSNAV2.0-Acrp30 was confirmed by PCR electrophoresis and digestion with restriction enzyme. The gene sequencing showed that the recombinant pSNAV2.0-Acrp30 was correct. The virus titer was about 1.0×1012 μg/ml. The purity f the recombinant AAV2/1 was fairly high using the SDS-PAGE method. Conclusion With this method, rAAV2/-Aerp30 with high virus titers and purity can be acquired successfully and it can meet the demands of the experimental study of Acrp30 gene therapy of GK rats.