摘要
目的:克隆纤维连结蛋白(FN)启动子和检测其转录活性,并初步研究增加SV40增强子对其转录活性的影响。方法:从正常人gDNA中克隆FN启动子,驱动氯霉素乙酰转移酶报告基因表达,构建成有SV40增强子和无SV40增强子两个重组体报告载体。利用脂质体介导的转染技术导入HT1080细胞,检测各重组体的瞬时表达,确定克隆FN启动子转录活性和SV40增强子对其转录活性的影响。结果:克隆的FN启动子在HT1080细胞中活性比SV40启动子稍强,在加入SV40增强子时活性提高了约6倍。结论:成功的克隆FN启动子,在HT1080细胞中有活性,通过增加SV40增强子能大大提高其活性,为运用FN启动子和特异性靶细胞治疗各种遗传性疾病提供了一定基础。
AIM: To clone fibronectin (FN) promoter and identify its transcriptional activity combined with SV40 enhancer. METHODS: FN promoter was amplified from genomic DNA by PCR and cloned into pCat3 - basic and pCat3 - ehancer vector to drive CAT expression. They were transferred to HT1080 cells with lipofectin. Then the instant CAT expression of different plasids was detected and the FN promoter transcriptional activity and its activity when it was combined with SV40 enhancer were evaluated. RESULTS: The FN promoter was cloned successfully. Its transcriptional activity was slightly stronger than the activity of SV40 promoter. Combined with SV40 enhancer, its activity was improved by about six times. CONCLUSION: The FN promoter cloned by us has transcriptional activity. The activity is increased by adding SV40 enhancer. These will provide useful information for gene therapy for combined FN promoter to cure some heredity diseases.
出处
《中国病理生理杂志》
CAS
CSCD
北大核心
2006年第7期1272-1276,共5页
Chinese Journal of Pathophysiology
基金
湖北省自然科学基金资助项目(2005ABA079)