摘要
目的 构建4个针对乙型肝炎病毒(HBV)S基因序列的小发夹RNA(shRNA)表达载体,作用于增强型绿色荧光蛋白(EGFP)和HBV S基因融合表达载体,观察shRNA对融合蛋白的抑制作用,筛选出有效靶位。 方法 利用pAVU6+27质粒,设计并构建4个shRNA表达载体,与融合表达载体共转染AD293细胞,荧光显微镜下观察融合蛋白的荧光表达情况并通过流式细胞仪分析shRNA对融合蛋白的抑制作用。同时,逆转录聚合酶链反应法验证其筛选的有效性。 结果 成功构建shRNA表达载体和HBs-EGFP融合表达载体;4组shRNA表达载体均可不同程度抑制融合基因的表达,其中以579位点最有效,荧光表达抑制率为69.8％,RNA水平抑制率为74.6％。 结论 筛选出有效抑制HBV S基因的siRNA靶位。
Objective To find some effective short interfering RNA's sites targeting HBV surface gene sequence using shRNA expression vectors. Methods Four shRNA expression vectors targeting HBV surface gene sequence were constructed based on pAVU6 + 27 vector, and cotransfected into AD293 cells with HBs-EGFP fusion gene plasmid. The changes of HBs-EGFP image were detected by FACS and microscopy. The HBs-EGFP mRNA expression was evaluated by RT-PCR. Results Four shRNA expression vectors and HBs-EGFP fusion gene plasmid were successfully constructed. pAVU6 + 4sh579 vector inhibited the HBs-EGFP expression by 69.8% in AD293 and suppressed the HBs-EGFP mRNA expression by 74.6%. Conclusions The results showed that the 579 site of HBV surface gene sequence was an effective target and pAVU6 + 4sh579 vector could suppress the HBs-EGFP expression in AD293 cells.
出处
《中华肝脏病杂志》
CAS
CSCD
2004年第9期515-518,共4页
Chinese Journal of Hepatology
基金
国家自然科学基金(30371270)
浙江省科技厅重大项目(2003C13015)
